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-rw-r--r--target/m68k/Makefile.objs3
-rw-r--r--target/m68k/cpu-qom.h52
-rw-r--r--target/m68k/cpu.c324
-rw-r--r--target/m68k/cpu.h308
-rw-r--r--target/m68k/gdbstub.c76
-rw-r--r--target/m68k/helper.c810
-rw-r--r--target/m68k/helper.h49
-rw-r--r--target/m68k/m68k-semi.c462
-rw-r--r--target/m68k/op_helper.c229
-rw-r--r--target/m68k/qregs.def13
-rw-r--r--target/m68k/translate.c3595
11 files changed, 5921 insertions, 0 deletions
diff --git a/target/m68k/Makefile.objs b/target/m68k/Makefile.objs
new file mode 100644
index 0000000000..02cf616a78
--- /dev/null
+++ b/target/m68k/Makefile.objs
@@ -0,0 +1,3 @@
+obj-y += m68k-semi.o
+obj-y += translate.o op_helper.o helper.o cpu.o
+obj-y += gdbstub.o
diff --git a/target/m68k/cpu-qom.h b/target/m68k/cpu-qom.h
new file mode 100644
index 0000000000..9885bba317
--- /dev/null
+++ b/target/m68k/cpu-qom.h
@@ -0,0 +1,52 @@
+/*
+ * QEMU Motorola 68k CPU
+ *
+ * Copyright (c) 2012 SUSE LINUX Products GmbH
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see
+ * <http://www.gnu.org/licenses/lgpl-2.1.html>
+ */
+#ifndef QEMU_M68K_CPU_QOM_H
+#define QEMU_M68K_CPU_QOM_H
+
+#include "qom/cpu.h"
+
+#define TYPE_M68K_CPU "m68k-cpu"
+
+#define M68K_CPU_CLASS(klass) \
+ OBJECT_CLASS_CHECK(M68kCPUClass, (klass), TYPE_M68K_CPU)
+#define M68K_CPU(obj) \
+ OBJECT_CHECK(M68kCPU, (obj), TYPE_M68K_CPU)
+#define M68K_CPU_GET_CLASS(obj) \
+ OBJECT_GET_CLASS(M68kCPUClass, (obj), TYPE_M68K_CPU)
+
+/**
+ * M68kCPUClass:
+ * @parent_realize: The parent class' realize handler.
+ * @parent_reset: The parent class' reset handler.
+ *
+ * A Motorola 68k CPU model.
+ */
+typedef struct M68kCPUClass {
+ /*< private >*/
+ CPUClass parent_class;
+ /*< public >*/
+
+ DeviceRealize parent_realize;
+ void (*parent_reset)(CPUState *cpu);
+} M68kCPUClass;
+
+typedef struct M68kCPU M68kCPU;
+
+#endif
diff --git a/target/m68k/cpu.c b/target/m68k/cpu.c
new file mode 100644
index 0000000000..ba17480098
--- /dev/null
+++ b/target/m68k/cpu.c
@@ -0,0 +1,324 @@
+/*
+ * QEMU Motorola 68k CPU
+ *
+ * Copyright (c) 2012 SUSE LINUX Products GmbH
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see
+ * <http://www.gnu.org/licenses/lgpl-2.1.html>
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "cpu.h"
+#include "qemu-common.h"
+#include "migration/vmstate.h"
+#include "exec/exec-all.h"
+
+
+static void m68k_cpu_set_pc(CPUState *cs, vaddr value)
+{
+ M68kCPU *cpu = M68K_CPU(cs);
+
+ cpu->env.pc = value;
+}
+
+static bool m68k_cpu_has_work(CPUState *cs)
+{
+ return cs->interrupt_request & CPU_INTERRUPT_HARD;
+}
+
+static void m68k_set_feature(CPUM68KState *env, int feature)
+{
+ env->features |= (1u << feature);
+}
+
+/* CPUClass::reset() */
+static void m68k_cpu_reset(CPUState *s)
+{
+ M68kCPU *cpu = M68K_CPU(s);
+ M68kCPUClass *mcc = M68K_CPU_GET_CLASS(cpu);
+ CPUM68KState *env = &cpu->env;
+
+ mcc->parent_reset(s);
+
+ memset(env, 0, offsetof(CPUM68KState, features));
+#if !defined(CONFIG_USER_ONLY)
+ env->sr = 0x2700;
+#endif
+ m68k_switch_sp(env);
+ /* ??? FP regs should be initialized to NaN. */
+ cpu_m68k_set_ccr(env, 0);
+ /* TODO: We should set PC from the interrupt vector. */
+ env->pc = 0;
+ tlb_flush(s, 1);
+}
+
+static void m68k_cpu_disas_set_info(CPUState *s, disassemble_info *info)
+{
+ M68kCPU *cpu = M68K_CPU(s);
+ CPUM68KState *env = &cpu->env;
+ info->print_insn = print_insn_m68k;
+ if (m68k_feature(env, M68K_FEATURE_M68000)) {
+ info->mach = bfd_mach_m68040;
+ }
+}
+
+/* CPU models */
+
+static ObjectClass *m68k_cpu_class_by_name(const char *cpu_model)
+{
+ ObjectClass *oc;
+ char *typename;
+
+ if (cpu_model == NULL) {
+ return NULL;
+ }
+
+ typename = g_strdup_printf("%s-" TYPE_M68K_CPU, cpu_model);
+ oc = object_class_by_name(typename);
+ g_free(typename);
+ if (oc != NULL && (object_class_dynamic_cast(oc, TYPE_M68K_CPU) == NULL ||
+ object_class_is_abstract(oc))) {
+ return NULL;
+ }
+ return oc;
+}
+
+static void m5206_cpu_initfn(Object *obj)
+{
+ M68kCPU *cpu = M68K_CPU(obj);
+ CPUM68KState *env = &cpu->env;
+
+ m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
+}
+
+static void m68000_cpu_initfn(Object *obj)
+{
+ M68kCPU *cpu = M68K_CPU(obj);
+ CPUM68KState *env = &cpu->env;
+
+ m68k_set_feature(env, M68K_FEATURE_M68000);
+ m68k_set_feature(env, M68K_FEATURE_USP);
+ m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
+}
+
+static void m68020_cpu_initfn(Object *obj)
+{
+ M68kCPU *cpu = M68K_CPU(obj);
+ CPUM68KState *env = &cpu->env;
+
+ m68k_set_feature(env, M68K_FEATURE_M68000);
+ m68k_set_feature(env, M68K_FEATURE_USP);
+ m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
+ m68k_set_feature(env, M68K_FEATURE_QUAD_MULDIV);
+ m68k_set_feature(env, M68K_FEATURE_BRAL);
+ m68k_set_feature(env, M68K_FEATURE_BCCL);
+ m68k_set_feature(env, M68K_FEATURE_BITFIELD);
+ m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
+ m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX);
+ m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV);
+ m68k_set_feature(env, M68K_FEATURE_FPU);
+ m68k_set_feature(env, M68K_FEATURE_CAS);
+ m68k_set_feature(env, M68K_FEATURE_BKPT);
+}
+#define m68030_cpu_initfn m68020_cpu_initfn
+#define m68040_cpu_initfn m68020_cpu_initfn
+
+static void m68060_cpu_initfn(Object *obj)
+{
+ M68kCPU *cpu = M68K_CPU(obj);
+ CPUM68KState *env = &cpu->env;
+
+ m68k_set_feature(env, M68K_FEATURE_M68000);
+ m68k_set_feature(env, M68K_FEATURE_USP);
+ m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
+ m68k_set_feature(env, M68K_FEATURE_BRAL);
+ m68k_set_feature(env, M68K_FEATURE_BCCL);
+ m68k_set_feature(env, M68K_FEATURE_BITFIELD);
+ m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
+ m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX);
+ m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV);
+ m68k_set_feature(env, M68K_FEATURE_FPU);
+ m68k_set_feature(env, M68K_FEATURE_CAS);
+ m68k_set_feature(env, M68K_FEATURE_BKPT);
+}
+
+static void m5208_cpu_initfn(Object *obj)
+{
+ M68kCPU *cpu = M68K_CPU(obj);
+ CPUM68KState *env = &cpu->env;
+
+ m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
+ m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
+ m68k_set_feature(env, M68K_FEATURE_BRAL);
+ m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
+ m68k_set_feature(env, M68K_FEATURE_USP);
+}
+
+static void cfv4e_cpu_initfn(Object *obj)
+{
+ M68kCPU *cpu = M68K_CPU(obj);
+ CPUM68KState *env = &cpu->env;
+
+ m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
+ m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
+ m68k_set_feature(env, M68K_FEATURE_BRAL);
+ m68k_set_feature(env, M68K_FEATURE_CF_FPU);
+ m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
+ m68k_set_feature(env, M68K_FEATURE_USP);
+}
+
+static void any_cpu_initfn(Object *obj)
+{
+ M68kCPU *cpu = M68K_CPU(obj);
+ CPUM68KState *env = &cpu->env;
+
+ m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
+ m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
+ m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
+ m68k_set_feature(env, M68K_FEATURE_BRAL);
+ m68k_set_feature(env, M68K_FEATURE_CF_FPU);
+ /* MAC and EMAC are mututally exclusive, so pick EMAC.
+ It's mostly backwards compatible. */
+ m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
+ m68k_set_feature(env, M68K_FEATURE_CF_EMAC_B);
+ m68k_set_feature(env, M68K_FEATURE_USP);
+ m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
+ m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
+}
+
+typedef struct M68kCPUInfo {
+ const char *name;
+ void (*instance_init)(Object *obj);
+} M68kCPUInfo;
+
+static const M68kCPUInfo m68k_cpus[] = {
+ { .name = "m68000", .instance_init = m68000_cpu_initfn },
+ { .name = "m68020", .instance_init = m68020_cpu_initfn },
+ { .name = "m68030", .instance_init = m68030_cpu_initfn },
+ { .name = "m68040", .instance_init = m68040_cpu_initfn },
+ { .name = "m68060", .instance_init = m68060_cpu_initfn },
+ { .name = "m5206", .instance_init = m5206_cpu_initfn },
+ { .name = "m5208", .instance_init = m5208_cpu_initfn },
+ { .name = "cfv4e", .instance_init = cfv4e_cpu_initfn },
+ { .name = "any", .instance_init = any_cpu_initfn },
+};
+
+static void m68k_cpu_realizefn(DeviceState *dev, Error **errp)
+{
+ CPUState *cs = CPU(dev);
+ M68kCPU *cpu = M68K_CPU(dev);
+ M68kCPUClass *mcc = M68K_CPU_GET_CLASS(dev);
+ Error *local_err = NULL;
+
+ cpu_exec_realizefn(cs, &local_err);
+ if (local_err != NULL) {
+ error_propagate(errp, local_err);
+ return;
+ }
+
+ m68k_cpu_init_gdb(cpu);
+
+ cpu_reset(cs);
+ qemu_init_vcpu(cs);
+
+ mcc->parent_realize(dev, errp);
+}
+
+static void m68k_cpu_initfn(Object *obj)
+{
+ CPUState *cs = CPU(obj);
+ M68kCPU *cpu = M68K_CPU(obj);
+ CPUM68KState *env = &cpu->env;
+ static bool inited;
+
+ cs->env_ptr = env;
+
+ if (tcg_enabled() && !inited) {
+ inited = true;
+ m68k_tcg_init();
+ }
+}
+
+static const VMStateDescription vmstate_m68k_cpu = {
+ .name = "cpu",
+ .unmigratable = 1,
+};
+
+static void m68k_cpu_class_init(ObjectClass *c, void *data)
+{
+ M68kCPUClass *mcc = M68K_CPU_CLASS(c);
+ CPUClass *cc = CPU_CLASS(c);
+ DeviceClass *dc = DEVICE_CLASS(c);
+
+ mcc->parent_realize = dc->realize;
+ dc->realize = m68k_cpu_realizefn;
+
+ mcc->parent_reset = cc->reset;
+ cc->reset = m68k_cpu_reset;
+
+ cc->class_by_name = m68k_cpu_class_by_name;
+ cc->has_work = m68k_cpu_has_work;
+ cc->do_interrupt = m68k_cpu_do_interrupt;
+ cc->cpu_exec_interrupt = m68k_cpu_exec_interrupt;
+ cc->dump_state = m68k_cpu_dump_state;
+ cc->set_pc = m68k_cpu_set_pc;
+ cc->gdb_read_register = m68k_cpu_gdb_read_register;
+ cc->gdb_write_register = m68k_cpu_gdb_write_register;
+#ifdef CONFIG_USER_ONLY
+ cc->handle_mmu_fault = m68k_cpu_handle_mmu_fault;
+#else
+ cc->get_phys_page_debug = m68k_cpu_get_phys_page_debug;
+#endif
+ cc->disas_set_info = m68k_cpu_disas_set_info;
+
+ cc->gdb_num_core_regs = 18;
+ cc->gdb_core_xml_file = "cf-core.xml";
+
+ dc->vmsd = &vmstate_m68k_cpu;
+}
+
+static void register_cpu_type(const M68kCPUInfo *info)
+{
+ TypeInfo type_info = {
+ .parent = TYPE_M68K_CPU,
+ .instance_init = info->instance_init,
+ };
+
+ type_info.name = g_strdup_printf("%s-" TYPE_M68K_CPU, info->name);
+ type_register(&type_info);
+ g_free((void *)type_info.name);
+}
+
+static const TypeInfo m68k_cpu_type_info = {
+ .name = TYPE_M68K_CPU,
+ .parent = TYPE_CPU,
+ .instance_size = sizeof(M68kCPU),
+ .instance_init = m68k_cpu_initfn,
+ .abstract = true,
+ .class_size = sizeof(M68kCPUClass),
+ .class_init = m68k_cpu_class_init,
+};
+
+static void m68k_cpu_register_types(void)
+{
+ int i;
+
+ type_register_static(&m68k_cpu_type_info);
+ for (i = 0; i < ARRAY_SIZE(m68k_cpus); i++) {
+ register_cpu_type(&m68k_cpus[i]);
+ }
+}
+
+type_init(m68k_cpu_register_types)
diff --git a/target/m68k/cpu.h b/target/m68k/cpu.h
new file mode 100644
index 0000000000..6dfb54eb70
--- /dev/null
+++ b/target/m68k/cpu.h
@@ -0,0 +1,308 @@
+/*
+ * m68k virtual CPU header
+ *
+ * Copyright (c) 2005-2007 CodeSourcery
+ * Written by Paul Brook
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef M68K_CPU_H
+#define M68K_CPU_H
+
+#define TARGET_LONG_BITS 32
+
+#define CPUArchState struct CPUM68KState
+
+#include "qemu-common.h"
+#include "exec/cpu-defs.h"
+#include "cpu-qom.h"
+#include "fpu/softfloat.h"
+
+#define OS_BYTE 0
+#define OS_WORD 1
+#define OS_LONG 2
+#define OS_SINGLE 3
+#define OS_DOUBLE 4
+#define OS_EXTENDED 5
+#define OS_PACKED 6
+
+#define MAX_QREGS 32
+
+#define EXCP_ACCESS 2 /* Access (MMU) error. */
+#define EXCP_ADDRESS 3 /* Address error. */
+#define EXCP_ILLEGAL 4 /* Illegal instruction. */
+#define EXCP_DIV0 5 /* Divide by zero */
+#define EXCP_PRIVILEGE 8 /* Privilege violation. */
+#define EXCP_TRACE 9
+#define EXCP_LINEA 10 /* Unimplemented line-A (MAC) opcode. */
+#define EXCP_LINEF 11 /* Unimplemented line-F (FPU) opcode. */
+#define EXCP_DEBUGNBP 12 /* Non-breakpoint debug interrupt. */
+#define EXCP_DEBEGBP 13 /* Breakpoint debug interrupt. */
+#define EXCP_FORMAT 14 /* RTE format error. */
+#define EXCP_UNINITIALIZED 15
+#define EXCP_TRAP0 32 /* User trap #0. */
+#define EXCP_TRAP15 47 /* User trap #15. */
+#define EXCP_UNSUPPORTED 61
+#define EXCP_ICE 13
+
+#define EXCP_RTE 0x100
+#define EXCP_HALT_INSN 0x101
+
+#define NB_MMU_MODES 2
+#define TARGET_INSN_START_EXTRA_WORDS 1
+
+typedef struct CPUM68KState {
+ uint32_t dregs[8];
+ uint32_t aregs[8];
+ uint32_t pc;
+ uint32_t sr;
+
+ /* SSP and USP. The current_sp is stored in aregs[7], the other here. */
+ int current_sp;
+ uint32_t sp[2];
+
+ /* Condition flags. */
+ uint32_t cc_op;
+ uint32_t cc_x; /* always 0/1 */
+ uint32_t cc_n; /* in bit 31 (i.e. negative) */
+ uint32_t cc_v; /* in bit 31, unused, or computed from cc_n and cc_v */
+ uint32_t cc_c; /* either 0/1, unused, or computed from cc_n and cc_v */
+ uint32_t cc_z; /* == 0 or unused */
+
+ float64 fregs[8];
+ float64 fp_result;
+ uint32_t fpcr;
+ uint32_t fpsr;
+ float_status fp_status;
+
+ uint64_t mactmp;
+ /* EMAC Hardware deals with 48-bit values composed of one 32-bit and
+ two 8-bit parts. We store a single 64-bit value and
+ rearrange/extend this when changing modes. */
+ uint64_t macc[4];
+ uint32_t macsr;
+ uint32_t mac_mask;
+
+ /* Temporary storage for DIV helpers. */
+ uint32_t div1;
+ uint32_t div2;
+
+ /* MMU status. */
+ struct {
+ uint32_t ar;
+ } mmu;
+
+ /* Control registers. */
+ uint32_t vbr;
+ uint32_t mbar;
+ uint32_t rambar0;
+ uint32_t cacr;
+
+ int pending_vector;
+ int pending_level;
+
+ uint32_t qregs[MAX_QREGS];
+
+ CPU_COMMON
+
+ /* Fields from here on are preserved across CPU reset. */
+ uint32_t features;
+} CPUM68KState;
+
+/**
+ * M68kCPU:
+ * @env: #CPUM68KState
+ *
+ * A Motorola 68k CPU.
+ */
+struct M68kCPU {
+ /*< private >*/
+ CPUState parent_obj;
+ /*< public >*/
+
+ CPUM68KState env;
+};
+
+static inline M68kCPU *m68k_env_get_cpu(CPUM68KState *env)
+{
+ return container_of(env, M68kCPU, env);
+}
+
+#define ENV_GET_CPU(e) CPU(m68k_env_get_cpu(e))
+
+#define ENV_OFFSET offsetof(M68kCPU, env)
+
+void m68k_cpu_do_interrupt(CPUState *cpu);
+bool m68k_cpu_exec_interrupt(CPUState *cpu, int int_req);
+void m68k_cpu_dump_state(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
+ int flags);
+hwaddr m68k_cpu_get_phys_page_debug(CPUState *cpu, vaddr addr);
+int m68k_cpu_gdb_read_register(CPUState *cpu, uint8_t *buf, int reg);
+int m68k_cpu_gdb_write_register(CPUState *cpu, uint8_t *buf, int reg);
+
+void m68k_tcg_init(void);
+void m68k_cpu_init_gdb(M68kCPU *cpu);
+M68kCPU *cpu_m68k_init(const char *cpu_model);
+/* you can call this signal handler from your SIGBUS and SIGSEGV
+ signal handlers to inform the virtual CPU of exceptions. non zero
+ is returned if the signal was handled by the virtual CPU. */
+int cpu_m68k_signal_handler(int host_signum, void *pinfo,
+ void *puc);
+uint32_t cpu_m68k_get_ccr(CPUM68KState *env);
+void cpu_m68k_set_ccr(CPUM68KState *env, uint32_t);
+
+
+/* Instead of computing the condition codes after each m68k instruction,
+ * QEMU just stores one operand (called CC_SRC), the result
+ * (called CC_DEST) and the type of operation (called CC_OP). When the
+ * condition codes are needed, the condition codes can be calculated
+ * using this information. Condition codes are not generated if they
+ * are only needed for conditional branches.
+ */
+typedef enum {
+ /* Translator only -- use env->cc_op. */
+ CC_OP_DYNAMIC = -1,
+
+ /* Each flag bit computed into cc_[xcnvz]. */
+ CC_OP_FLAGS,
+
+ /* X in cc_x, C = X, N in cc_n, Z in cc_n, V via cc_n/cc_v. */
+ CC_OP_ADDB, CC_OP_ADDW, CC_OP_ADDL,
+ CC_OP_SUBB, CC_OP_SUBW, CC_OP_SUBL,
+
+ /* X in cc_x, {N,Z,C,V} via cc_n/cc_v. */
+ CC_OP_CMPB, CC_OP_CMPW, CC_OP_CMPL,
+
+ /* X in cc_x, C = 0, V = 0, N in cc_n, Z in cc_n. */
+ CC_OP_LOGIC,
+
+ CC_OP_NB
+} CCOp;
+
+#define CCF_C 0x01
+#define CCF_V 0x02
+#define CCF_Z 0x04
+#define CCF_N 0x08
+#define CCF_X 0x10
+
+#define SR_I_SHIFT 8
+#define SR_I 0x0700
+#define SR_M 0x1000
+#define SR_S 0x2000
+#define SR_T 0x8000
+
+#define M68K_SSP 0
+#define M68K_USP 1
+
+/* CACR fields are implementation defined, but some bits are common. */
+#define M68K_CACR_EUSP 0x10
+
+#define MACSR_PAV0 0x100
+#define MACSR_OMC 0x080
+#define MACSR_SU 0x040
+#define MACSR_FI 0x020
+#define MACSR_RT 0x010
+#define MACSR_N 0x008
+#define MACSR_Z 0x004
+#define MACSR_V 0x002
+#define MACSR_EV 0x001
+
+void m68k_set_irq_level(M68kCPU *cpu, int level, uint8_t vector);
+void m68k_switch_sp(CPUM68KState *env);
+
+#define M68K_FPCR_PREC (1 << 6)
+
+void do_m68k_semihosting(CPUM68KState *env, int nr);
+
+/* There are 4 ColdFire core ISA revisions: A, A+, B and C.
+ Each feature covers the subset of instructions common to the
+ ISA revisions mentioned. */
+
+enum m68k_features {
+ M68K_FEATURE_M68000,
+ M68K_FEATURE_CF_ISA_A,
+ M68K_FEATURE_CF_ISA_B, /* (ISA B or C). */
+ M68K_FEATURE_CF_ISA_APLUSC, /* BIT/BITREV, FF1, STRLDSR (ISA A+ or C). */
+ M68K_FEATURE_BRAL, /* Long unconditional branch. (ISA A+ or B). */
+ M68K_FEATURE_CF_FPU,
+ M68K_FEATURE_CF_MAC,
+ M68K_FEATURE_CF_EMAC,
+ M68K_FEATURE_CF_EMAC_B, /* Revision B EMAC (dual accumulate). */
+ M68K_FEATURE_USP, /* User Stack Pointer. (ISA A+, B or C). */
+ M68K_FEATURE_EXT_FULL, /* 68020+ full extension word. */
+ M68K_FEATURE_WORD_INDEX, /* word sized address index registers. */
+ M68K_FEATURE_SCALED_INDEX, /* scaled address index registers. */
+ M68K_FEATURE_LONG_MULDIV, /* 32 bit multiply/divide. */
+ M68K_FEATURE_QUAD_MULDIV, /* 64 bit multiply/divide. */
+ M68K_FEATURE_BCCL, /* Long conditional branches. */
+ M68K_FEATURE_BITFIELD, /* Bit field insns. */
+ M68K_FEATURE_FPU,
+ M68K_FEATURE_CAS,
+ M68K_FEATURE_BKPT,
+};
+
+static inline int m68k_feature(CPUM68KState *env, int feature)
+{
+ return (env->features & (1u << feature)) != 0;
+}
+
+void m68k_cpu_list(FILE *f, fprintf_function cpu_fprintf);
+
+void register_m68k_insns (CPUM68KState *env);
+
+#ifdef CONFIG_USER_ONLY
+/* Coldfire Linux uses 8k pages
+ * and m68k linux uses 4k pages
+ * use the smaller one
+ */
+#define TARGET_PAGE_BITS 12
+#else
+/* Smallest TLB entry size is 1k. */
+#define TARGET_PAGE_BITS 10
+#endif
+
+#define TARGET_PHYS_ADDR_SPACE_BITS 32
+#define TARGET_VIRT_ADDR_SPACE_BITS 32
+
+#define cpu_init(cpu_model) CPU(cpu_m68k_init(cpu_model))
+
+#define cpu_signal_handler cpu_m68k_signal_handler
+#define cpu_list m68k_cpu_list
+
+/* MMU modes definitions */
+#define MMU_MODE0_SUFFIX _kernel
+#define MMU_MODE1_SUFFIX _user
+#define MMU_USER_IDX 1
+static inline int cpu_mmu_index (CPUM68KState *env, bool ifetch)
+{
+ return (env->sr & SR_S) == 0 ? 1 : 0;
+}
+
+int m68k_cpu_handle_mmu_fault(CPUState *cpu, vaddr address, int rw,
+ int mmu_idx);
+
+#include "exec/cpu-all.h"
+
+static inline void cpu_get_tb_cpu_state(CPUM68KState *env, target_ulong *pc,
+ target_ulong *cs_base, uint32_t *flags)
+{
+ *pc = env->pc;
+ *cs_base = 0;
+ *flags = (env->fpcr & M68K_FPCR_PREC) /* Bit 6 */
+ | (env->sr & SR_S) /* Bit 13 */
+ | ((env->macsr >> 4) & 0xf); /* Bits 0-3 */
+}
+
+#endif
diff --git a/target/m68k/gdbstub.c b/target/m68k/gdbstub.c
new file mode 100644
index 0000000000..c7f44c9bb3
--- /dev/null
+++ b/target/m68k/gdbstub.c
@@ -0,0 +1,76 @@
+/*
+ * m68k gdb server stub
+ *
+ * Copyright (c) 2003-2005 Fabrice Bellard
+ * Copyright (c) 2013 SUSE LINUX Products GmbH
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+#include "cpu.h"
+#include "exec/gdbstub.h"
+
+int m68k_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
+{
+ M68kCPU *cpu = M68K_CPU(cs);
+ CPUM68KState *env = &cpu->env;
+
+ if (n < 8) {
+ /* D0-D7 */
+ return gdb_get_reg32(mem_buf, env->dregs[n]);
+ } else if (n < 16) {
+ /* A0-A7 */
+ return gdb_get_reg32(mem_buf, env->aregs[n - 8]);
+ } else {
+ switch (n) {
+ case 16:
+ return gdb_get_reg32(mem_buf, env->sr);
+ case 17:
+ return gdb_get_reg32(mem_buf, env->pc);
+ }
+ }
+ /* FP registers not included here because they vary between
+ ColdFire and m68k. Use XML bits for these. */
+ return 0;
+}
+
+int m68k_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
+{
+ M68kCPU *cpu = M68K_CPU(cs);
+ CPUM68KState *env = &cpu->env;
+ uint32_t tmp;
+
+ tmp = ldl_p(mem_buf);
+
+ if (n < 8) {
+ /* D0-D7 */
+ env->dregs[n] = tmp;
+ } else if (n < 16) {
+ /* A0-A7 */
+ env->aregs[n - 8] = tmp;
+ } else {
+ switch (n) {
+ case 16:
+ env->sr = tmp;
+ break;
+ case 17:
+ env->pc = tmp;
+ break;
+ default:
+ return 0;
+ }
+ }
+ return 4;
+}
diff --git a/target/m68k/helper.c b/target/m68k/helper.c
new file mode 100644
index 0000000000..7aed9ffd2f
--- /dev/null
+++ b/target/m68k/helper.c
@@ -0,0 +1,810 @@
+/*
+ * m68k op helpers
+ *
+ * Copyright (c) 2006-2007 CodeSourcery
+ * Written by Paul Brook
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "cpu.h"
+#include "exec/exec-all.h"
+#include "exec/gdbstub.h"
+
+#include "exec/helper-proto.h"
+
+#define SIGNBIT (1u << 31)
+
+/* Sort alphabetically, except for "any". */
+static gint m68k_cpu_list_compare(gconstpointer a, gconstpointer b)
+{
+ ObjectClass *class_a = (ObjectClass *)a;
+ ObjectClass *class_b = (ObjectClass *)b;
+ const char *name_a, *name_b;
+
+ name_a = object_class_get_name(class_a);
+ name_b = object_class_get_name(class_b);
+ if (strcmp(name_a, "any-" TYPE_M68K_CPU) == 0) {
+ return 1;
+ } else if (strcmp(name_b, "any-" TYPE_M68K_CPU) == 0) {
+ return -1;
+ } else {
+ return strcasecmp(name_a, name_b);
+ }
+}
+
+static void m68k_cpu_list_entry(gpointer data, gpointer user_data)
+{
+ ObjectClass *c = data;
+ CPUListState *s = user_data;
+ const char *typename;
+ char *name;
+
+ typename = object_class_get_name(c);
+ name = g_strndup(typename, strlen(typename) - strlen("-" TYPE_M68K_CPU));
+ (*s->cpu_fprintf)(s->file, "%s\n",
+ name);
+ g_free(name);
+}
+
+void m68k_cpu_list(FILE *f, fprintf_function cpu_fprintf)
+{
+ CPUListState s = {
+ .file = f,
+ .cpu_fprintf = cpu_fprintf,
+ };
+ GSList *list;
+
+ list = object_class_get_list(TYPE_M68K_CPU, false);
+ list = g_slist_sort(list, m68k_cpu_list_compare);
+ g_slist_foreach(list, m68k_cpu_list_entry, &s);
+ g_slist_free(list);
+}
+
+static int fpu_gdb_get_reg(CPUM68KState *env, uint8_t *mem_buf, int n)
+{
+ if (n < 8) {
+ stfq_p(mem_buf, env->fregs[n]);
+ return 8;
+ }
+ if (n < 11) {
+ /* FP control registers (not implemented) */
+ memset(mem_buf, 0, 4);
+ return 4;
+ }
+ return 0;
+}
+
+static int fpu_gdb_set_reg(CPUM68KState *env, uint8_t *mem_buf, int n)
+{
+ if (n < 8) {
+ env->fregs[n] = ldfq_p(mem_buf);
+ return 8;
+ }
+ if (n < 11) {
+ /* FP control registers (not implemented) */
+ return 4;
+ }
+ return 0;
+}
+
+M68kCPU *cpu_m68k_init(const char *cpu_model)
+{
+ M68kCPU *cpu;
+ CPUM68KState *env;
+ ObjectClass *oc;
+
+ oc = cpu_class_by_name(TYPE_M68K_CPU, cpu_model);
+ if (oc == NULL) {
+ return NULL;
+ }
+ cpu = M68K_CPU(object_new(object_class_get_name(oc)));
+ env = &cpu->env;
+
+ register_m68k_insns(env);
+
+ object_property_set_bool(OBJECT(cpu), true, "realized", NULL);
+
+ return cpu;
+}
+
+void m68k_cpu_init_gdb(M68kCPU *cpu)
+{
+ CPUState *cs = CPU(cpu);
+ CPUM68KState *env = &cpu->env;
+
+ if (m68k_feature(env, M68K_FEATURE_CF_FPU)) {
+ gdb_register_coprocessor(cs, fpu_gdb_get_reg, fpu_gdb_set_reg,
+ 11, "cf-fp.xml", 18);
+ }
+ /* TODO: Add [E]MAC registers. */
+}
+
+void HELPER(movec)(CPUM68KState *env, uint32_t reg, uint32_t val)
+{
+ M68kCPU *cpu = m68k_env_get_cpu(env);
+
+ switch (reg) {
+ case 0x02: /* CACR */
+ env->cacr = val;
+ m68k_switch_sp(env);
+ break;
+ case 0x04: case 0x05: case 0x06: case 0x07: /* ACR[0-3] */
+ /* TODO: Implement Access Control Registers. */
+ break;
+ case 0x801: /* VBR */
+ env->vbr = val;
+ break;
+ /* TODO: Implement control registers. */
+ default:
+ cpu_abort(CPU(cpu), "Unimplemented control register write 0x%x = 0x%x\n",
+ reg, val);
+ }
+}
+
+void HELPER(set_macsr)(CPUM68KState *env, uint32_t val)
+{
+ uint32_t acc;
+ int8_t exthigh;
+ uint8_t extlow;
+ uint64_t regval;
+ int i;
+ if ((env->macsr ^ val) & (MACSR_FI | MACSR_SU)) {
+ for (i = 0; i < 4; i++) {
+ regval = env->macc[i];
+ exthigh = regval >> 40;
+ if (env->macsr & MACSR_FI) {
+ acc = regval >> 8;
+ extlow = regval;
+ } else {
+ acc = regval;
+ extlow = regval >> 32;
+ }
+ if (env->macsr & MACSR_FI) {
+ regval = (((uint64_t)acc) << 8) | extlow;
+ regval |= ((int64_t)exthigh) << 40;
+ } else if (env->macsr & MACSR_SU) {
+ regval = acc | (((int64_t)extlow) << 32);
+ regval |= ((int64_t)exthigh) << 40;
+ } else {
+ regval = acc | (((uint64_t)extlow) << 32);
+ regval |= ((uint64_t)(uint8_t)exthigh) << 40;
+ }
+ env->macc[i] = regval;
+ }
+ }
+ env->macsr = val;
+}
+
+void m68k_switch_sp(CPUM68KState *env)
+{
+ int new_sp;
+
+ env->sp[env->current_sp] = env->aregs[7];
+ new_sp = (env->sr & SR_S && env->cacr & M68K_CACR_EUSP)
+ ? M68K_SSP : M68K_USP;
+ env->aregs[7] = env->sp[new_sp];
+ env->current_sp = new_sp;
+}
+
+#if defined(CONFIG_USER_ONLY)
+
+int m68k_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
+ int mmu_idx)
+{
+ M68kCPU *cpu = M68K_CPU(cs);
+
+ cs->exception_index = EXCP_ACCESS;
+ cpu->env.mmu.ar = address;
+ return 1;
+}
+
+#else
+
+/* MMU */
+
+/* TODO: This will need fixing once the MMU is implemented. */
+hwaddr m68k_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
+{
+ return addr;
+}
+
+int m68k_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
+ int mmu_idx)
+{
+ int prot;
+
+ address &= TARGET_PAGE_MASK;
+ prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
+ tlb_set_page(cs, address, address, prot, mmu_idx, TARGET_PAGE_SIZE);
+ return 0;
+}
+
+/* Notify CPU of a pending interrupt. Prioritization and vectoring should
+ be handled by the interrupt controller. Real hardware only requests
+ the vector when the interrupt is acknowledged by the CPU. For
+ simplicitly we calculate it when the interrupt is signalled. */
+void m68k_set_irq_level(M68kCPU *cpu, int level, uint8_t vector)
+{
+ CPUState *cs = CPU(cpu);
+ CPUM68KState *env = &cpu->env;
+
+ env->pending_level = level;
+ env->pending_vector = vector;
+ if (level) {
+ cpu_interrupt(cs, CPU_INTERRUPT_HARD);
+ } else {
+ cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
+ }
+}
+
+#endif
+
+uint32_t HELPER(bitrev)(uint32_t x)
+{
+ x = ((x >> 1) & 0x55555555u) | ((x << 1) & 0xaaaaaaaau);
+ x = ((x >> 2) & 0x33333333u) | ((x << 2) & 0xccccccccu);
+ x = ((x >> 4) & 0x0f0f0f0fu) | ((x << 4) & 0xf0f0f0f0u);
+ return bswap32(x);
+}
+
+uint32_t HELPER(ff1)(uint32_t x)
+{
+ int n;
+ for (n = 32; x; n--)
+ x >>= 1;
+ return n;
+}
+
+uint32_t HELPER(sats)(uint32_t val, uint32_t v)
+{
+ /* The result has the opposite sign to the original value. */
+ if ((int32_t)v < 0) {
+ val = (((int32_t)val) >> 31) ^ SIGNBIT;
+ }
+ return val;
+}
+
+void HELPER(set_sr)(CPUM68KState *env, uint32_t val)
+{
+ env->sr = val & 0xffe0;
+ cpu_m68k_set_ccr(env, val);
+ m68k_switch_sp(env);
+}
+
+uint32_t HELPER(shl_cc)(CPUM68KState *env, uint32_t val, uint32_t shift)
+{
+ uint64_t result;
+
+ shift &= 63;
+ result = (uint64_t)val << shift;
+
+ env->cc_c = (result >> 32) & 1;
+ env->cc_n = result;
+ env->cc_z = result;
+ env->cc_v = 0;
+ env->cc_x = shift ? env->cc_c : env->cc_x;
+
+ return result;
+}
+
+uint32_t HELPER(shr_cc)(CPUM68KState *env, uint32_t val, uint32_t shift)
+{
+ uint64_t temp;
+ uint32_t result;
+
+ shift &= 63;
+ temp = (uint64_t)val << 32 >> shift;
+ result = temp >> 32;
+
+ env->cc_c = (temp >> 31) & 1;
+ env->cc_n = result;
+ env->cc_z = result;
+ env->cc_v = 0;
+ env->cc_x = shift ? env->cc_c : env->cc_x;
+
+ return result;
+}
+
+uint32_t HELPER(sar_cc)(CPUM68KState *env, uint32_t val, uint32_t shift)
+{
+ uint64_t temp;
+ uint32_t result;
+
+ shift &= 63;
+ temp = (int64_t)val << 32 >> shift;
+ result = temp >> 32;
+
+ env->cc_c = (temp >> 31) & 1;
+ env->cc_n = result;
+ env->cc_z = result;
+ env->cc_v = result ^ val;
+ env->cc_x = shift ? env->cc_c : env->cc_x;
+
+ return result;
+}
+
+/* FPU helpers. */
+uint32_t HELPER(f64_to_i32)(CPUM68KState *env, float64 val)
+{
+ return float64_to_int32(val, &env->fp_status);
+}
+
+float32 HELPER(f64_to_f32)(CPUM68KState *env, float64 val)
+{
+ return float64_to_float32(val, &env->fp_status);
+}
+
+float64 HELPER(i32_to_f64)(CPUM68KState *env, uint32_t val)
+{
+ return int32_to_float64(val, &env->fp_status);
+}
+
+float64 HELPER(f32_to_f64)(CPUM68KState *env, float32 val)
+{
+ return float32_to_float64(val, &env->fp_status);
+}
+
+float64 HELPER(iround_f64)(CPUM68KState *env, float64 val)
+{
+ return float64_round_to_int(val, &env->fp_status);
+}
+
+float64 HELPER(itrunc_f64)(CPUM68KState *env, float64 val)
+{
+ return float64_trunc_to_int(val, &env->fp_status);
+}
+
+float64 HELPER(sqrt_f64)(CPUM68KState *env, float64 val)
+{
+ return float64_sqrt(val, &env->fp_status);
+}
+
+float64 HELPER(abs_f64)(float64 val)
+{
+ return float64_abs(val);
+}
+
+float64 HELPER(chs_f64)(float64 val)
+{
+ return float64_chs(val);
+}
+
+float64 HELPER(add_f64)(CPUM68KState *env, float64 a, float64 b)
+{
+ return float64_add(a, b, &env->fp_status);
+}
+
+float64 HELPER(sub_f64)(CPUM68KState *env, float64 a, float64 b)
+{
+ return float64_sub(a, b, &env->fp_status);
+}
+
+float64 HELPER(mul_f64)(CPUM68KState *env, float64 a, float64 b)
+{
+ return float64_mul(a, b, &env->fp_status);
+}
+
+float64 HELPER(div_f64)(CPUM68KState *env, float64 a, float64 b)
+{
+ return float64_div(a, b, &env->fp_status);
+}
+
+float64 HELPER(sub_cmp_f64)(CPUM68KState *env, float64 a, float64 b)
+{
+ /* ??? This may incorrectly raise exceptions. */
+ /* ??? Should flush denormals to zero. */
+ float64 res;
+ res = float64_sub(a, b, &env->fp_status);
+ if (float64_is_quiet_nan(res, &env->fp_status)) {
+ /* +/-inf compares equal against itself, but sub returns nan. */
+ if (!float64_is_quiet_nan(a, &env->fp_status)
+ && !float64_is_quiet_nan(b, &env->fp_status)) {
+ res = float64_zero;
+ if (float64_lt_quiet(a, res, &env->fp_status))
+ res = float64_chs(res);
+ }
+ }
+ return res;
+}
+
+uint32_t HELPER(compare_f64)(CPUM68KState *env, float64 val)
+{
+ return float64_compare_quiet(val, float64_zero, &env->fp_status);
+}
+
+/* MAC unit. */
+/* FIXME: The MAC unit implementation is a bit of a mess. Some helpers
+ take values, others take register numbers and manipulate the contents
+ in-place. */
+void HELPER(mac_move)(CPUM68KState *env, uint32_t dest, uint32_t src)
+{
+ uint32_t mask;
+ env->macc[dest] = env->macc[src];
+ mask = MACSR_PAV0 << dest;
+ if (env->macsr & (MACSR_PAV0 << src))
+ env->macsr |= mask;
+ else
+ env->macsr &= ~mask;
+}
+
+uint64_t HELPER(macmuls)(CPUM68KState *env, uint32_t op1, uint32_t op2)
+{
+ int64_t product;
+ int64_t res;
+
+ product = (uint64_t)op1 * op2;
+ res = (product << 24) >> 24;
+ if (res != product) {
+ env->macsr |= MACSR_V;
+ if (env->macsr & MACSR_OMC) {
+ /* Make sure the accumulate operation overflows. */
+ if (product < 0)
+ res = ~(1ll << 50);
+ else
+ res = 1ll << 50;
+ }
+ }
+ return res;
+}
+
+uint64_t HELPER(macmulu)(CPUM68KState *env, uint32_t op1, uint32_t op2)
+{
+ uint64_t product;
+
+ product = (uint64_t)op1 * op2;
+ if (product & (0xffffffull << 40)) {
+ env->macsr |= MACSR_V;
+ if (env->macsr & MACSR_OMC) {
+ /* Make sure the accumulate operation overflows. */
+ product = 1ll << 50;
+ } else {
+ product &= ((1ull << 40) - 1);
+ }
+ }
+ return product;
+}
+
+uint64_t HELPER(macmulf)(CPUM68KState *env, uint32_t op1, uint32_t op2)
+{
+ uint64_t product;
+ uint32_t remainder;
+
+ product = (uint64_t)op1 * op2;
+ if (env->macsr & MACSR_RT) {
+ remainder = product & 0xffffff;
+ product >>= 24;
+ if (remainder > 0x800000)
+ product++;
+ else if (remainder == 0x800000)
+ product += (product & 1);
+ } else {
+ product >>= 24;
+ }
+ return product;
+}
+
+void HELPER(macsats)(CPUM68KState *env, uint32_t acc)
+{
+ int64_t tmp;
+ int64_t result;
+ tmp = env->macc[acc];
+ result = ((tmp << 16) >> 16);
+ if (result != tmp) {
+ env->macsr |= MACSR_V;
+ }
+ if (env->macsr & MACSR_V) {
+ env->macsr |= MACSR_PAV0 << acc;
+ if (env->macsr & MACSR_OMC) {
+ /* The result is saturated to 32 bits, despite overflow occurring
+ at 48 bits. Seems weird, but that's what the hardware docs
+ say. */
+ result = (result >> 63) ^ 0x7fffffff;
+ }
+ }
+ env->macc[acc] = result;
+}
+
+void HELPER(macsatu)(CPUM68KState *env, uint32_t acc)
+{
+ uint64_t val;
+
+ val = env->macc[acc];
+ if (val & (0xffffull << 48)) {
+ env->macsr |= MACSR_V;
+ }
+ if (env->macsr & MACSR_V) {
+ env->macsr |= MACSR_PAV0 << acc;
+ if (env->macsr & MACSR_OMC) {
+ if (val > (1ull << 53))
+ val = 0;
+ else
+ val = (1ull << 48) - 1;
+ } else {
+ val &= ((1ull << 48) - 1);
+ }
+ }
+ env->macc[acc] = val;
+}
+
+void HELPER(macsatf)(CPUM68KState *env, uint32_t acc)
+{
+ int64_t sum;
+ int64_t result;
+
+ sum = env->macc[acc];
+ result = (sum << 16) >> 16;
+ if (result != sum) {
+ env->macsr |= MACSR_V;
+ }
+ if (env->macsr & MACSR_V) {
+ env->macsr |= MACSR_PAV0 << acc;
+ if (env->macsr & MACSR_OMC) {
+ result = (result >> 63) ^ 0x7fffffffffffll;
+ }
+ }
+ env->macc[acc] = result;
+}
+
+void HELPER(mac_set_flags)(CPUM68KState *env, uint32_t acc)
+{
+ uint64_t val;
+ val = env->macc[acc];
+ if (val == 0) {
+ env->macsr |= MACSR_Z;
+ } else if (val & (1ull << 47)) {
+ env->macsr |= MACSR_N;
+ }
+ if (env->macsr & (MACSR_PAV0 << acc)) {
+ env->macsr |= MACSR_V;
+ }
+ if (env->macsr & MACSR_FI) {
+ val = ((int64_t)val) >> 40;
+ if (val != 0 && val != -1)
+ env->macsr |= MACSR_EV;
+ } else if (env->macsr & MACSR_SU) {
+ val = ((int64_t)val) >> 32;
+ if (val != 0 && val != -1)
+ env->macsr |= MACSR_EV;
+ } else {
+ if ((val >> 32) != 0)
+ env->macsr |= MACSR_EV;
+ }
+}
+
+#define EXTSIGN(val, index) ( \
+ (index == 0) ? (int8_t)(val) : ((index == 1) ? (int16_t)(val) : (val)) \
+)
+
+#define COMPUTE_CCR(op, x, n, z, v, c) { \
+ switch (op) { \
+ case CC_OP_FLAGS: \
+ /* Everything in place. */ \
+ break; \
+ case CC_OP_ADDB: \
+ case CC_OP_ADDW: \
+ case CC_OP_ADDL: \
+ res = n; \
+ src2 = v; \
+ src1 = EXTSIGN(res - src2, op - CC_OP_ADDB); \
+ c = x; \
+ z = n; \
+ v = (res ^ src1) & ~(src1 ^ src2); \
+ break; \
+ case CC_OP_SUBB: \
+ case CC_OP_SUBW: \
+ case CC_OP_SUBL: \
+ res = n; \
+ src2 = v; \
+ src1 = EXTSIGN(res + src2, op - CC_OP_SUBB); \
+ c = x; \
+ z = n; \
+ v = (res ^ src1) & (src1 ^ src2); \
+ break; \
+ case CC_OP_CMPB: \
+ case CC_OP_CMPW: \
+ case CC_OP_CMPL: \
+ src1 = n; \
+ src2 = v; \
+ res = EXTSIGN(src1 - src2, op - CC_OP_CMPB); \
+ n = res; \
+ z = res; \
+ c = src1 < src2; \
+ v = (res ^ src1) & (src1 ^ src2); \
+ break; \
+ case CC_OP_LOGIC: \
+ c = v = 0; \
+ z = n; \
+ break; \
+ default: \
+ cpu_abort(CPU(m68k_env_get_cpu(env)), "Bad CC_OP %d", op); \
+ } \
+} while (0)
+
+uint32_t cpu_m68k_get_ccr(CPUM68KState *env)
+{
+ uint32_t x, c, n, z, v;
+ uint32_t res, src1, src2;
+
+ x = env->cc_x;
+ n = env->cc_n;
+ z = env->cc_z;
+ v = env->cc_v;
+ c = env->cc_c;
+
+ COMPUTE_CCR(env->cc_op, x, n, z, v, c);
+
+ n = n >> 31;
+ z = (z == 0);
+ v = v >> 31;
+
+ return x * CCF_X + n * CCF_N + z * CCF_Z + v * CCF_V + c * CCF_C;
+}
+
+uint32_t HELPER(get_ccr)(CPUM68KState *env)
+{
+ return cpu_m68k_get_ccr(env);
+}
+
+void cpu_m68k_set_ccr(CPUM68KState *env, uint32_t ccr)
+{
+ env->cc_x = (ccr & CCF_X ? 1 : 0);
+ env->cc_n = (ccr & CCF_N ? -1 : 0);
+ env->cc_z = (ccr & CCF_Z ? 0 : 1);
+ env->cc_v = (ccr & CCF_V ? -1 : 0);
+ env->cc_c = (ccr & CCF_C ? 1 : 0);
+ env->cc_op = CC_OP_FLAGS;
+}
+
+void HELPER(set_ccr)(CPUM68KState *env, uint32_t ccr)
+{
+ cpu_m68k_set_ccr(env, ccr);
+}
+
+void HELPER(flush_flags)(CPUM68KState *env, uint32_t cc_op)
+{
+ uint32_t res, src1, src2;
+
+ COMPUTE_CCR(cc_op, env->cc_x, env->cc_n, env->cc_z, env->cc_v, env->cc_c);
+ env->cc_op = CC_OP_FLAGS;
+}
+
+uint32_t HELPER(get_macf)(CPUM68KState *env, uint64_t val)
+{
+ int rem;
+ uint32_t result;
+
+ if (env->macsr & MACSR_SU) {
+ /* 16-bit rounding. */
+ rem = val & 0xffffff;
+ val = (val >> 24) & 0xffffu;
+ if (rem > 0x800000)
+ val++;
+ else if (rem == 0x800000)
+ val += (val & 1);
+ } else if (env->macsr & MACSR_RT) {
+ /* 32-bit rounding. */
+ rem = val & 0xff;
+ val >>= 8;
+ if (rem > 0x80)
+ val++;
+ else if (rem == 0x80)
+ val += (val & 1);
+ } else {
+ /* No rounding. */
+ val >>= 8;
+ }
+ if (env->macsr & MACSR_OMC) {
+ /* Saturate. */
+ if (env->macsr & MACSR_SU) {
+ if (val != (uint16_t) val) {
+ result = ((val >> 63) ^ 0x7fff) & 0xffff;
+ } else {
+ result = val & 0xffff;
+ }
+ } else {
+ if (val != (uint32_t)val) {
+ result = ((uint32_t)(val >> 63) & 0x7fffffff);
+ } else {
+ result = (uint32_t)val;
+ }
+ }
+ } else {
+ /* No saturation. */
+ if (env->macsr & MACSR_SU) {
+ result = val & 0xffff;
+ } else {
+ result = (uint32_t)val;
+ }
+ }
+ return result;
+}
+
+uint32_t HELPER(get_macs)(uint64_t val)
+{
+ if (val == (int32_t)val) {
+ return (int32_t)val;
+ } else {
+ return (val >> 61) ^ ~SIGNBIT;
+ }
+}
+
+uint32_t HELPER(get_macu)(uint64_t val)
+{
+ if ((val >> 32) == 0) {
+ return (uint32_t)val;
+ } else {
+ return 0xffffffffu;
+ }
+}
+
+uint32_t HELPER(get_mac_extf)(CPUM68KState *env, uint32_t acc)
+{
+ uint32_t val;
+ val = env->macc[acc] & 0x00ff;
+ val |= (env->macc[acc] >> 32) & 0xff00;
+ val |= (env->macc[acc + 1] << 16) & 0x00ff0000;
+ val |= (env->macc[acc + 1] >> 16) & 0xff000000;
+ return val;
+}
+
+uint32_t HELPER(get_mac_exti)(CPUM68KState *env, uint32_t acc)
+{
+ uint32_t val;
+ val = (env->macc[acc] >> 32) & 0xffff;
+ val |= (env->macc[acc + 1] >> 16) & 0xffff0000;
+ return val;
+}
+
+void HELPER(set_mac_extf)(CPUM68KState *env, uint32_t val, uint32_t acc)
+{
+ int64_t res;
+ int32_t tmp;
+ res = env->macc[acc] & 0xffffffff00ull;
+ tmp = (int16_t)(val & 0xff00);
+ res |= ((int64_t)tmp) << 32;
+ res |= val & 0xff;
+ env->macc[acc] = res;
+ res = env->macc[acc + 1] & 0xffffffff00ull;
+ tmp = (val & 0xff000000);
+ res |= ((int64_t)tmp) << 16;
+ res |= (val >> 16) & 0xff;
+ env->macc[acc + 1] = res;
+}
+
+void HELPER(set_mac_exts)(CPUM68KState *env, uint32_t val, uint32_t acc)
+{
+ int64_t res;
+ int32_t tmp;
+ res = (uint32_t)env->macc[acc];
+ tmp = (int16_t)val;
+ res |= ((int64_t)tmp) << 32;
+ env->macc[acc] = res;
+ res = (uint32_t)env->macc[acc + 1];
+ tmp = val & 0xffff0000;
+ res |= (int64_t)tmp << 16;
+ env->macc[acc + 1] = res;
+}
+
+void HELPER(set_mac_extu)(CPUM68KState *env, uint32_t val, uint32_t acc)
+{
+ uint64_t res;
+ res = (uint32_t)env->macc[acc];
+ res |= ((uint64_t)(val & 0xffff)) << 32;
+ env->macc[acc] = res;
+ res = (uint32_t)env->macc[acc + 1];
+ res |= (uint64_t)(val & 0xffff0000) << 16;
+ env->macc[acc + 1] = res;
+}
diff --git a/target/m68k/helper.h b/target/m68k/helper.h
new file mode 100644
index 0000000000..2697e32d0b
--- /dev/null
+++ b/target/m68k/helper.h
@@ -0,0 +1,49 @@
+DEF_HELPER_1(bitrev, i32, i32)
+DEF_HELPER_1(ff1, i32, i32)
+DEF_HELPER_FLAGS_2(sats, TCG_CALL_NO_RWG_SE, i32, i32, i32)
+DEF_HELPER_2(divu, void, env, i32)
+DEF_HELPER_2(divs, void, env, i32)
+DEF_HELPER_3(shl_cc, i32, env, i32, i32)
+DEF_HELPER_3(shr_cc, i32, env, i32, i32)
+DEF_HELPER_3(sar_cc, i32, env, i32, i32)
+DEF_HELPER_2(set_sr, void, env, i32)
+DEF_HELPER_3(movec, void, env, i32, i32)
+
+DEF_HELPER_2(f64_to_i32, f32, env, f64)
+DEF_HELPER_2(f64_to_f32, f32, env, f64)
+DEF_HELPER_2(i32_to_f64, f64, env, i32)
+DEF_HELPER_2(f32_to_f64, f64, env, f32)
+DEF_HELPER_2(iround_f64, f64, env, f64)
+DEF_HELPER_2(itrunc_f64, f64, env, f64)
+DEF_HELPER_2(sqrt_f64, f64, env, f64)
+DEF_HELPER_1(abs_f64, f64, f64)
+DEF_HELPER_1(chs_f64, f64, f64)
+DEF_HELPER_3(add_f64, f64, env, f64, f64)
+DEF_HELPER_3(sub_f64, f64, env, f64, f64)
+DEF_HELPER_3(mul_f64, f64, env, f64, f64)
+DEF_HELPER_3(div_f64, f64, env, f64, f64)
+DEF_HELPER_3(sub_cmp_f64, f64, env, f64, f64)
+DEF_HELPER_2(compare_f64, i32, env, f64)
+
+DEF_HELPER_3(mac_move, void, env, i32, i32)
+DEF_HELPER_3(macmulf, i64, env, i32, i32)
+DEF_HELPER_3(macmuls, i64, env, i32, i32)
+DEF_HELPER_3(macmulu, i64, env, i32, i32)
+DEF_HELPER_2(macsats, void, env, i32)
+DEF_HELPER_2(macsatu, void, env, i32)
+DEF_HELPER_2(macsatf, void, env, i32)
+DEF_HELPER_2(mac_set_flags, void, env, i32)
+DEF_HELPER_2(set_macsr, void, env, i32)
+DEF_HELPER_2(get_macf, i32, env, i64)
+DEF_HELPER_1(get_macs, i32, i64)
+DEF_HELPER_1(get_macu, i32, i64)
+DEF_HELPER_2(get_mac_extf, i32, env, i32)
+DEF_HELPER_2(get_mac_exti, i32, env, i32)
+DEF_HELPER_3(set_mac_extf, void, env, i32, i32)
+DEF_HELPER_3(set_mac_exts, void, env, i32, i32)
+DEF_HELPER_3(set_mac_extu, void, env, i32, i32)
+
+DEF_HELPER_2(flush_flags, void, env, i32)
+DEF_HELPER_2(set_ccr, void, env, i32)
+DEF_HELPER_FLAGS_1(get_ccr, TCG_CALL_NO_WG_SE, i32, env)
+DEF_HELPER_2(raise_exception, void, env, i32)
diff --git a/target/m68k/m68k-semi.c b/target/m68k/m68k-semi.c
new file mode 100644
index 0000000000..1402145c8f
--- /dev/null
+++ b/target/m68k/m68k-semi.c
@@ -0,0 +1,462 @@
+/*
+ * m68k/ColdFire Semihosting syscall interface
+ *
+ * Copyright (c) 2005-2007 CodeSourcery.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+
+#include "cpu.h"
+#if defined(CONFIG_USER_ONLY)
+#include "qemu.h"
+#define SEMIHOSTING_HEAP_SIZE (128 * 1024 * 1024)
+#else
+#include "qemu-common.h"
+#include "exec/gdbstub.h"
+#include "exec/softmmu-semi.h"
+#endif
+#include "qemu/log.h"
+#include "sysemu/sysemu.h"
+
+#define HOSTED_EXIT 0
+#define HOSTED_INIT_SIM 1
+#define HOSTED_OPEN 2
+#define HOSTED_CLOSE 3
+#define HOSTED_READ 4
+#define HOSTED_WRITE 5
+#define HOSTED_LSEEK 6
+#define HOSTED_RENAME 7
+#define HOSTED_UNLINK 8
+#define HOSTED_STAT 9
+#define HOSTED_FSTAT 10
+#define HOSTED_GETTIMEOFDAY 11
+#define HOSTED_ISATTY 12
+#define HOSTED_SYSTEM 13
+
+typedef uint32_t gdb_mode_t;
+typedef uint32_t gdb_time_t;
+
+struct m68k_gdb_stat {
+ uint32_t gdb_st_dev; /* device */
+ uint32_t gdb_st_ino; /* inode */
+ gdb_mode_t gdb_st_mode; /* protection */
+ uint32_t gdb_st_nlink; /* number of hard links */
+ uint32_t gdb_st_uid; /* user ID of owner */
+ uint32_t gdb_st_gid; /* group ID of owner */
+ uint32_t gdb_st_rdev; /* device type (if inode device) */
+ uint64_t gdb_st_size; /* total size, in bytes */
+ uint64_t gdb_st_blksize; /* blocksize for filesystem I/O */
+ uint64_t gdb_st_blocks; /* number of blocks allocated */
+ gdb_time_t gdb_st_atime; /* time of last access */
+ gdb_time_t gdb_st_mtime; /* time of last modification */
+ gdb_time_t gdb_st_ctime; /* time of last change */
+} QEMU_PACKED;
+
+struct gdb_timeval {
+ gdb_time_t tv_sec; /* second */
+ uint64_t tv_usec; /* microsecond */
+} QEMU_PACKED;
+
+#define GDB_O_RDONLY 0x0
+#define GDB_O_WRONLY 0x1
+#define GDB_O_RDWR 0x2
+#define GDB_O_APPEND 0x8
+#define GDB_O_CREAT 0x200
+#define GDB_O_TRUNC 0x400
+#define GDB_O_EXCL 0x800
+
+static int translate_openflags(int flags)
+{
+ int hf;
+
+ if (flags & GDB_O_WRONLY)
+ hf = O_WRONLY;
+ else if (flags & GDB_O_RDWR)
+ hf = O_RDWR;
+ else
+ hf = O_RDONLY;
+
+ if (flags & GDB_O_APPEND) hf |= O_APPEND;
+ if (flags & GDB_O_CREAT) hf |= O_CREAT;
+ if (flags & GDB_O_TRUNC) hf |= O_TRUNC;
+ if (flags & GDB_O_EXCL) hf |= O_EXCL;
+
+ return hf;
+}
+
+static void translate_stat(CPUM68KState *env, target_ulong addr, struct stat *s)
+{
+ struct m68k_gdb_stat *p;
+
+ if (!(p = lock_user(VERIFY_WRITE, addr, sizeof(struct m68k_gdb_stat), 0)))
+ /* FIXME - should this return an error code? */
+ return;
+ p->gdb_st_dev = cpu_to_be32(s->st_dev);
+ p->gdb_st_ino = cpu_to_be32(s->st_ino);
+ p->gdb_st_mode = cpu_to_be32(s->st_mode);
+ p->gdb_st_nlink = cpu_to_be32(s->st_nlink);
+ p->gdb_st_uid = cpu_to_be32(s->st_uid);
+ p->gdb_st_gid = cpu_to_be32(s->st_gid);
+ p->gdb_st_rdev = cpu_to_be32(s->st_rdev);
+ p->gdb_st_size = cpu_to_be64(s->st_size);
+#ifdef _WIN32
+ /* Windows stat is missing some fields. */
+ p->gdb_st_blksize = 0;
+ p->gdb_st_blocks = 0;
+#else
+ p->gdb_st_blksize = cpu_to_be64(s->st_blksize);
+ p->gdb_st_blocks = cpu_to_be64(s->st_blocks);
+#endif
+ p->gdb_st_atime = cpu_to_be32(s->st_atime);
+ p->gdb_st_mtime = cpu_to_be32(s->st_mtime);
+ p->gdb_st_ctime = cpu_to_be32(s->st_ctime);
+ unlock_user(p, addr, sizeof(struct m68k_gdb_stat));
+}
+
+static void m68k_semi_return_u32(CPUM68KState *env, uint32_t ret, uint32_t err)
+{
+ target_ulong args = env->dregs[1];
+ if (put_user_u32(ret, args) ||
+ put_user_u32(err, args + 4)) {
+ /* The m68k semihosting ABI does not provide any way to report this
+ * error to the guest, so the best we can do is log it in qemu.
+ * It is always a guest error not to pass us a valid argument block.
+ */
+ qemu_log_mask(LOG_GUEST_ERROR, "m68k-semihosting: return value "
+ "discarded because argument block not writable\n");
+ }
+}
+
+static void m68k_semi_return_u64(CPUM68KState *env, uint64_t ret, uint32_t err)
+{
+ target_ulong args = env->dregs[1];
+ if (put_user_u32(ret >> 32, args) ||
+ put_user_u32(ret, args + 4) ||
+ put_user_u32(err, args + 8)) {
+ /* No way to report this via m68k semihosting ABI; just log it */
+ qemu_log_mask(LOG_GUEST_ERROR, "m68k-semihosting: return value "
+ "discarded because argument block not writable\n");
+ }
+}
+
+static int m68k_semi_is_fseek;
+
+static void m68k_semi_cb(CPUState *cs, target_ulong ret, target_ulong err)
+{
+ M68kCPU *cpu = M68K_CPU(cs);
+ CPUM68KState *env = &cpu->env;
+
+ if (m68k_semi_is_fseek) {
+ /* FIXME: We've already lost the high bits of the fseek
+ return value. */
+ m68k_semi_return_u64(env, ret, err);
+ m68k_semi_is_fseek = 0;
+ } else {
+ m68k_semi_return_u32(env, ret, err);
+ }
+}
+
+/* Read the input value from the argument block; fail the semihosting
+ * call if the memory read fails.
+ */
+#define GET_ARG(n) do { \
+ if (get_user_ual(arg ## n, args + (n) * 4)) { \
+ result = -1; \
+ errno = EFAULT; \
+ goto failed; \
+ } \
+} while (0)
+
+void do_m68k_semihosting(CPUM68KState *env, int nr)
+{
+ uint32_t args;
+ target_ulong arg0, arg1, arg2, arg3;
+ void *p;
+ void *q;
+ uint32_t len;
+ uint32_t result;
+
+ args = env->dregs[1];
+ switch (nr) {
+ case HOSTED_EXIT:
+ gdb_exit(env, env->dregs[0]);
+ exit(env->dregs[0]);
+ case HOSTED_OPEN:
+ GET_ARG(0);
+ GET_ARG(1);
+ GET_ARG(2);
+ GET_ARG(3);
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(m68k_semi_cb, "open,%s,%x,%x", arg0, (int)arg1,
+ arg2, arg3);
+ return;
+ } else {
+ p = lock_user_string(arg0);
+ if (!p) {
+ /* FIXME - check error code? */
+ result = -1;
+ } else {
+ result = open(p, translate_openflags(arg2), arg3);
+ unlock_user(p, arg0, 0);
+ }
+ }
+ break;
+ case HOSTED_CLOSE:
+ {
+ /* Ignore attempts to close stdin/out/err. */
+ GET_ARG(0);
+ int fd = arg0;
+ if (fd > 2) {
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(m68k_semi_cb, "close,%x", arg0);
+ return;
+ } else {
+ result = close(fd);
+ }
+ } else {
+ result = 0;
+ }
+ break;
+ }
+ case HOSTED_READ:
+ GET_ARG(0);
+ GET_ARG(1);
+ GET_ARG(2);
+ len = arg2;
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(m68k_semi_cb, "read,%x,%x,%x",
+ arg0, arg1, len);
+ return;
+ } else {
+ p = lock_user(VERIFY_WRITE, arg1, len, 0);
+ if (!p) {
+ /* FIXME - check error code? */
+ result = -1;
+ } else {
+ result = read(arg0, p, len);
+ unlock_user(p, arg1, len);
+ }
+ }
+ break;
+ case HOSTED_WRITE:
+ GET_ARG(0);
+ GET_ARG(1);
+ GET_ARG(2);
+ len = arg2;
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(m68k_semi_cb, "write,%x,%x,%x",
+ arg0, arg1, len);
+ return;
+ } else {
+ p = lock_user(VERIFY_READ, arg1, len, 1);
+ if (!p) {
+ /* FIXME - check error code? */
+ result = -1;
+ } else {
+ result = write(arg0, p, len);
+ unlock_user(p, arg0, 0);
+ }
+ }
+ break;
+ case HOSTED_LSEEK:
+ {
+ uint64_t off;
+ GET_ARG(0);
+ GET_ARG(1);
+ GET_ARG(2);
+ GET_ARG(3);
+ off = (uint32_t)arg2 | ((uint64_t)arg1 << 32);
+ if (use_gdb_syscalls()) {
+ m68k_semi_is_fseek = 1;
+ gdb_do_syscall(m68k_semi_cb, "fseek,%x,%lx,%x",
+ arg0, off, arg3);
+ } else {
+ off = lseek(arg0, off, arg3);
+ m68k_semi_return_u64(env, off, errno);
+ }
+ return;
+ }
+ case HOSTED_RENAME:
+ GET_ARG(0);
+ GET_ARG(1);
+ GET_ARG(2);
+ GET_ARG(3);
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(m68k_semi_cb, "rename,%s,%s",
+ arg0, (int)arg1, arg2, (int)arg3);
+ return;
+ } else {
+ p = lock_user_string(arg0);
+ q = lock_user_string(arg2);
+ if (!p || !q) {
+ /* FIXME - check error code? */
+ result = -1;
+ } else {
+ result = rename(p, q);
+ }
+ unlock_user(p, arg0, 0);
+ unlock_user(q, arg2, 0);
+ }
+ break;
+ case HOSTED_UNLINK:
+ GET_ARG(0);
+ GET_ARG(1);
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(m68k_semi_cb, "unlink,%s",
+ arg0, (int)arg1);
+ return;
+ } else {
+ p = lock_user_string(arg0);
+ if (!p) {
+ /* FIXME - check error code? */
+ result = -1;
+ } else {
+ result = unlink(p);
+ unlock_user(p, arg0, 0);
+ }
+ }
+ break;
+ case HOSTED_STAT:
+ GET_ARG(0);
+ GET_ARG(1);
+ GET_ARG(2);
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(m68k_semi_cb, "stat,%s,%x",
+ arg0, (int)arg1, arg2);
+ return;
+ } else {
+ struct stat s;
+ p = lock_user_string(arg0);
+ if (!p) {
+ /* FIXME - check error code? */
+ result = -1;
+ } else {
+ result = stat(p, &s);
+ unlock_user(p, arg0, 0);
+ }
+ if (result == 0) {
+ translate_stat(env, arg2, &s);
+ }
+ }
+ break;
+ case HOSTED_FSTAT:
+ GET_ARG(0);
+ GET_ARG(1);
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(m68k_semi_cb, "fstat,%x,%x",
+ arg0, arg1);
+ return;
+ } else {
+ struct stat s;
+ result = fstat(arg0, &s);
+ if (result == 0) {
+ translate_stat(env, arg1, &s);
+ }
+ }
+ break;
+ case HOSTED_GETTIMEOFDAY:
+ GET_ARG(0);
+ GET_ARG(1);
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(m68k_semi_cb, "gettimeofday,%x,%x",
+ arg0, arg1);
+ return;
+ } else {
+ qemu_timeval tv;
+ struct gdb_timeval *p;
+ result = qemu_gettimeofday(&tv);
+ if (result != 0) {
+ if (!(p = lock_user(VERIFY_WRITE,
+ arg0, sizeof(struct gdb_timeval), 0))) {
+ /* FIXME - check error code? */
+ result = -1;
+ } else {
+ p->tv_sec = cpu_to_be32(tv.tv_sec);
+ p->tv_usec = cpu_to_be64(tv.tv_usec);
+ unlock_user(p, arg0, sizeof(struct gdb_timeval));
+ }
+ }
+ }
+ break;
+ case HOSTED_ISATTY:
+ GET_ARG(0);
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(m68k_semi_cb, "isatty,%x", arg0);
+ return;
+ } else {
+ result = isatty(arg0);
+ }
+ break;
+ case HOSTED_SYSTEM:
+ GET_ARG(0);
+ GET_ARG(1);
+ if (use_gdb_syscalls()) {
+ gdb_do_syscall(m68k_semi_cb, "system,%s",
+ arg0, (int)arg1);
+ return;
+ } else {
+ p = lock_user_string(arg0);
+ if (!p) {
+ /* FIXME - check error code? */
+ result = -1;
+ } else {
+ result = system(p);
+ unlock_user(p, arg0, 0);
+ }
+ }
+ break;
+ case HOSTED_INIT_SIM:
+#if defined(CONFIG_USER_ONLY)
+ {
+ CPUState *cs = CPU(m68k_env_get_cpu(env));
+ TaskState *ts = cs->opaque;
+ /* Allocate the heap using sbrk. */
+ if (!ts->heap_limit) {
+ abi_ulong ret;
+ uint32_t size;
+ uint32_t base;
+
+ base = do_brk(0);
+ size = SEMIHOSTING_HEAP_SIZE;
+ /* Try a big heap, and reduce the size if that fails. */
+ for (;;) {
+ ret = do_brk(base + size);
+ if (ret >= (base + size)) {
+ break;
+ }
+ size >>= 1;
+ }
+ ts->heap_limit = base + size;
+ }
+ /* This call may happen before we have writable memory, so return
+ values directly in registers. */
+ env->dregs[1] = ts->heap_limit;
+ env->aregs[7] = ts->stack_base;
+ }
+#else
+ /* FIXME: This is wrong for boards where RAM does not start at
+ address zero. */
+ env->dregs[1] = ram_size;
+ env->aregs[7] = ram_size;
+#endif
+ return;
+ default:
+ cpu_abort(CPU(m68k_env_get_cpu(env)), "Unsupported semihosting syscall %d\n", nr);
+ result = 0;
+ }
+failed:
+ m68k_semi_return_u32(env, result, errno);
+}
diff --git a/target/m68k/op_helper.c b/target/m68k/op_helper.c
new file mode 100644
index 0000000000..48e02e4062
--- /dev/null
+++ b/target/m68k/op_helper.c
@@ -0,0 +1,229 @@
+/*
+ * M68K helper routines
+ *
+ * Copyright (c) 2007 CodeSourcery
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+#include "qemu/osdep.h"
+#include "cpu.h"
+#include "exec/helper-proto.h"
+#include "exec/exec-all.h"
+#include "exec/cpu_ldst.h"
+#include "exec/semihost.h"
+
+#if defined(CONFIG_USER_ONLY)
+
+void m68k_cpu_do_interrupt(CPUState *cs)
+{
+ cs->exception_index = -1;
+}
+
+static inline void do_interrupt_m68k_hardirq(CPUM68KState *env)
+{
+}
+
+#else
+
+/* Try to fill the TLB and return an exception if error. If retaddr is
+ NULL, it means that the function was called in C code (i.e. not
+ from generated code or from helper.c) */
+void tlb_fill(CPUState *cs, target_ulong addr, MMUAccessType access_type,
+ int mmu_idx, uintptr_t retaddr)
+{
+ int ret;
+
+ ret = m68k_cpu_handle_mmu_fault(cs, addr, access_type, mmu_idx);
+ if (unlikely(ret)) {
+ if (retaddr) {
+ /* now we have a real cpu fault */
+ cpu_restore_state(cs, retaddr);
+ }
+ cpu_loop_exit(cs);
+ }
+}
+
+static void do_rte(CPUM68KState *env)
+{
+ uint32_t sp;
+ uint32_t fmt;
+
+ sp = env->aregs[7];
+ fmt = cpu_ldl_kernel(env, sp);
+ env->pc = cpu_ldl_kernel(env, sp + 4);
+ sp |= (fmt >> 28) & 3;
+ env->aregs[7] = sp + 8;
+
+ helper_set_sr(env, fmt);
+}
+
+static void do_interrupt_all(CPUM68KState *env, int is_hw)
+{
+ CPUState *cs = CPU(m68k_env_get_cpu(env));
+ uint32_t sp;
+ uint32_t fmt;
+ uint32_t retaddr;
+ uint32_t vector;
+
+ fmt = 0;
+ retaddr = env->pc;
+
+ if (!is_hw) {
+ switch (cs->exception_index) {
+ case EXCP_RTE:
+ /* Return from an exception. */
+ do_rte(env);
+ return;
+ case EXCP_HALT_INSN:
+ if (semihosting_enabled()
+ && (env->sr & SR_S) != 0
+ && (env->pc & 3) == 0
+ && cpu_lduw_code(env, env->pc - 4) == 0x4e71
+ && cpu_ldl_code(env, env->pc) == 0x4e7bf000) {
+ env->pc += 4;
+ do_m68k_semihosting(env, env->dregs[0]);
+ return;
+ }
+ cs->halted = 1;
+ cs->exception_index = EXCP_HLT;
+ cpu_loop_exit(cs);
+ return;
+ }
+ if (cs->exception_index >= EXCP_TRAP0
+ && cs->exception_index <= EXCP_TRAP15) {
+ /* Move the PC after the trap instruction. */
+ retaddr += 2;
+ }
+ }
+
+ vector = cs->exception_index << 2;
+
+ fmt |= 0x40000000;
+ fmt |= vector << 16;
+ fmt |= env->sr;
+ fmt |= cpu_m68k_get_ccr(env);
+
+ env->sr |= SR_S;
+ if (is_hw) {
+ env->sr = (env->sr & ~SR_I) | (env->pending_level << SR_I_SHIFT);
+ env->sr &= ~SR_M;
+ }
+ m68k_switch_sp(env);
+ sp = env->aregs[7];
+ fmt |= (sp & 3) << 28;
+
+ /* ??? This could cause MMU faults. */
+ sp &= ~3;
+ sp -= 4;
+ cpu_stl_kernel(env, sp, retaddr);
+ sp -= 4;
+ cpu_stl_kernel(env, sp, fmt);
+ env->aregs[7] = sp;
+ /* Jump to vector. */
+ env->pc = cpu_ldl_kernel(env, env->vbr + vector);
+}
+
+void m68k_cpu_do_interrupt(CPUState *cs)
+{
+ M68kCPU *cpu = M68K_CPU(cs);
+ CPUM68KState *env = &cpu->env;
+
+ do_interrupt_all(env, 0);
+}
+
+static inline void do_interrupt_m68k_hardirq(CPUM68KState *env)
+{
+ do_interrupt_all(env, 1);
+}
+#endif
+
+bool m68k_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
+{
+ M68kCPU *cpu = M68K_CPU(cs);
+ CPUM68KState *env = &cpu->env;
+
+ if (interrupt_request & CPU_INTERRUPT_HARD
+ && ((env->sr & SR_I) >> SR_I_SHIFT) < env->pending_level) {
+ /* Real hardware gets the interrupt vector via an IACK cycle
+ at this point. Current emulated hardware doesn't rely on
+ this, so we provide/save the vector when the interrupt is
+ first signalled. */
+ cs->exception_index = env->pending_vector;
+ do_interrupt_m68k_hardirq(env);
+ return true;
+ }
+ return false;
+}
+
+static void raise_exception(CPUM68KState *env, int tt)
+{
+ CPUState *cs = CPU(m68k_env_get_cpu(env));
+
+ cs->exception_index = tt;
+ cpu_loop_exit(cs);
+}
+
+void HELPER(raise_exception)(CPUM68KState *env, uint32_t tt)
+{
+ raise_exception(env, tt);
+}
+
+void HELPER(divu)(CPUM68KState *env, uint32_t word)
+{
+ uint32_t num;
+ uint32_t den;
+ uint32_t quot;
+ uint32_t rem;
+
+ num = env->div1;
+ den = env->div2;
+ /* ??? This needs to make sure the throwing location is accurate. */
+ if (den == 0) {
+ raise_exception(env, EXCP_DIV0);
+ }
+ quot = num / den;
+ rem = num % den;
+
+ env->cc_v = (word && quot > 0xffff ? -1 : 0);
+ env->cc_z = quot;
+ env->cc_n = quot;
+ env->cc_c = 0;
+
+ env->div1 = quot;
+ env->div2 = rem;
+}
+
+void HELPER(divs)(CPUM68KState *env, uint32_t word)
+{
+ int32_t num;
+ int32_t den;
+ int32_t quot;
+ int32_t rem;
+
+ num = env->div1;
+ den = env->div2;
+ if (den == 0) {
+ raise_exception(env, EXCP_DIV0);
+ }
+ quot = num / den;
+ rem = num % den;
+
+ env->cc_v = (word && quot != (int16_t)quot ? -1 : 0);
+ env->cc_z = quot;
+ env->cc_n = quot;
+ env->cc_c = 0;
+
+ env->div1 = quot;
+ env->div2 = rem;
+}
diff --git a/target/m68k/qregs.def b/target/m68k/qregs.def
new file mode 100644
index 0000000000..156c0f558f
--- /dev/null
+++ b/target/m68k/qregs.def
@@ -0,0 +1,13 @@
+DEFF64(FP_RESULT, fp_result)
+DEFO32(PC, pc)
+DEFO32(SR, sr)
+DEFO32(CC_OP, cc_op)
+DEFO32(CC_X, cc_x)
+DEFO32(CC_C, cc_c)
+DEFO32(CC_N, cc_n)
+DEFO32(CC_V, cc_v)
+DEFO32(CC_Z, cc_z)
+DEFO32(DIV1, div1)
+DEFO32(DIV2, div2)
+DEFO32(MACSR, macsr)
+DEFO32(MAC_MASK, mac_mask)
diff --git a/target/m68k/translate.c b/target/m68k/translate.c
new file mode 100644
index 0000000000..d6ed883882
--- /dev/null
+++ b/target/m68k/translate.c
@@ -0,0 +1,3595 @@
+/*
+ * m68k translation
+ *
+ * Copyright (c) 2005-2007 CodeSourcery
+ * Written by Paul Brook
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "cpu.h"
+#include "disas/disas.h"
+#include "exec/exec-all.h"
+#include "tcg-op.h"
+#include "qemu/log.h"
+#include "exec/cpu_ldst.h"
+
+#include "exec/helper-proto.h"
+#include "exec/helper-gen.h"
+
+#include "trace-tcg.h"
+#include "exec/log.h"
+
+
+//#define DEBUG_DISPATCH 1
+
+/* Fake floating point. */
+#define tcg_gen_mov_f64 tcg_gen_mov_i64
+#define tcg_gen_qemu_ldf64 tcg_gen_qemu_ld64
+#define tcg_gen_qemu_stf64 tcg_gen_qemu_st64
+
+#define DEFO32(name, offset) static TCGv QREG_##name;
+#define DEFO64(name, offset) static TCGv_i64 QREG_##name;
+#define DEFF64(name, offset) static TCGv_i64 QREG_##name;
+#include "qregs.def"
+#undef DEFO32
+#undef DEFO64
+#undef DEFF64
+
+static TCGv_i32 cpu_halted;
+static TCGv_i32 cpu_exception_index;
+
+static TCGv_env cpu_env;
+
+static char cpu_reg_names[3*8*3 + 5*4];
+static TCGv cpu_dregs[8];
+static TCGv cpu_aregs[8];
+static TCGv_i64 cpu_fregs[8];
+static TCGv_i64 cpu_macc[4];
+
+#define REG(insn, pos) (((insn) >> (pos)) & 7)
+#define DREG(insn, pos) cpu_dregs[REG(insn, pos)]
+#define AREG(insn, pos) cpu_aregs[REG(insn, pos)]
+#define FREG(insn, pos) cpu_fregs[REG(insn, pos)]
+#define MACREG(acc) cpu_macc[acc]
+#define QREG_SP cpu_aregs[7]
+
+static TCGv NULL_QREG;
+#define IS_NULL_QREG(t) (TCGV_EQUAL(t, NULL_QREG))
+/* Used to distinguish stores from bad addressing modes. */
+static TCGv store_dummy;
+
+#include "exec/gen-icount.h"
+
+void m68k_tcg_init(void)
+{
+ char *p;
+ int i;
+
+ cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+ tcg_ctx.tcg_env = cpu_env;
+
+#define DEFO32(name, offset) \
+ QREG_##name = tcg_global_mem_new_i32(cpu_env, \
+ offsetof(CPUM68KState, offset), #name);
+#define DEFO64(name, offset) \
+ QREG_##name = tcg_global_mem_new_i64(cpu_env, \
+ offsetof(CPUM68KState, offset), #name);
+#define DEFF64(name, offset) DEFO64(name, offset)
+#include "qregs.def"
+#undef DEFO32
+#undef DEFO64
+#undef DEFF64
+
+ cpu_halted = tcg_global_mem_new_i32(cpu_env,
+ -offsetof(M68kCPU, env) +
+ offsetof(CPUState, halted), "HALTED");
+ cpu_exception_index = tcg_global_mem_new_i32(cpu_env,
+ -offsetof(M68kCPU, env) +
+ offsetof(CPUState, exception_index),
+ "EXCEPTION");
+
+ p = cpu_reg_names;
+ for (i = 0; i < 8; i++) {
+ sprintf(p, "D%d", i);
+ cpu_dregs[i] = tcg_global_mem_new(cpu_env,
+ offsetof(CPUM68KState, dregs[i]), p);
+ p += 3;
+ sprintf(p, "A%d", i);
+ cpu_aregs[i] = tcg_global_mem_new(cpu_env,
+ offsetof(CPUM68KState, aregs[i]), p);
+ p += 3;
+ sprintf(p, "F%d", i);
+ cpu_fregs[i] = tcg_global_mem_new_i64(cpu_env,
+ offsetof(CPUM68KState, fregs[i]), p);
+ p += 3;
+ }
+ for (i = 0; i < 4; i++) {
+ sprintf(p, "ACC%d", i);
+ cpu_macc[i] = tcg_global_mem_new_i64(cpu_env,
+ offsetof(CPUM68KState, macc[i]), p);
+ p += 5;
+ }
+
+ NULL_QREG = tcg_global_mem_new(cpu_env, -4, "NULL");
+ store_dummy = tcg_global_mem_new(cpu_env, -8, "NULL");
+}
+
+/* internal defines */
+typedef struct DisasContext {
+ CPUM68KState *env;
+ target_ulong insn_pc; /* Start of the current instruction. */
+ target_ulong pc;
+ int is_jmp;
+ CCOp cc_op; /* Current CC operation */
+ int cc_op_synced;
+ int user;
+ uint32_t fpcr;
+ struct TranslationBlock *tb;
+ int singlestep_enabled;
+ TCGv_i64 mactmp;
+ int done_mac;
+} DisasContext;
+
+#define DISAS_JUMP_NEXT 4
+
+#if defined(CONFIG_USER_ONLY)
+#define IS_USER(s) 1
+#else
+#define IS_USER(s) s->user
+#endif
+
+/* XXX: move that elsewhere */
+/* ??? Fix exceptions. */
+static void *gen_throws_exception;
+#define gen_last_qop NULL
+
+typedef void (*disas_proc)(CPUM68KState *env, DisasContext *s, uint16_t insn);
+
+#ifdef DEBUG_DISPATCH
+#define DISAS_INSN(name) \
+ static void real_disas_##name(CPUM68KState *env, DisasContext *s, \
+ uint16_t insn); \
+ static void disas_##name(CPUM68KState *env, DisasContext *s, \
+ uint16_t insn) \
+ { \
+ qemu_log("Dispatch " #name "\n"); \
+ real_disas_##name(env, s, insn); \
+ } \
+ static void real_disas_##name(CPUM68KState *env, DisasContext *s, \
+ uint16_t insn)
+#else
+#define DISAS_INSN(name) \
+ static void disas_##name(CPUM68KState *env, DisasContext *s, \
+ uint16_t insn)
+#endif
+
+static const uint8_t cc_op_live[CC_OP_NB] = {
+ [CC_OP_FLAGS] = CCF_C | CCF_V | CCF_Z | CCF_N | CCF_X,
+ [CC_OP_ADDB ... CC_OP_ADDL] = CCF_X | CCF_N | CCF_V,
+ [CC_OP_SUBB ... CC_OP_SUBL] = CCF_X | CCF_N | CCF_V,
+ [CC_OP_CMPB ... CC_OP_CMPL] = CCF_X | CCF_N | CCF_V,
+ [CC_OP_LOGIC] = CCF_X | CCF_N
+};
+
+static void set_cc_op(DisasContext *s, CCOp op)
+{
+ CCOp old_op = s->cc_op;
+ int dead;
+
+ if (old_op == op) {
+ return;
+ }
+ s->cc_op = op;
+ s->cc_op_synced = 0;
+
+ /* Discard CC computation that will no longer be used.
+ Note that X and N are never dead. */
+ dead = cc_op_live[old_op] & ~cc_op_live[op];
+ if (dead & CCF_C) {
+ tcg_gen_discard_i32(QREG_CC_C);
+ }
+ if (dead & CCF_Z) {
+ tcg_gen_discard_i32(QREG_CC_Z);
+ }
+ if (dead & CCF_V) {
+ tcg_gen_discard_i32(QREG_CC_V);
+ }
+}
+
+/* Update the CPU env CC_OP state. */
+static void update_cc_op(DisasContext *s)
+{
+ if (!s->cc_op_synced) {
+ s->cc_op_synced = 1;
+ tcg_gen_movi_i32(QREG_CC_OP, s->cc_op);
+ }
+}
+
+/* Generate a load from the specified address. Narrow values are
+ sign extended to full register width. */
+static inline TCGv gen_load(DisasContext * s, int opsize, TCGv addr, int sign)
+{
+ TCGv tmp;
+ int index = IS_USER(s);
+ tmp = tcg_temp_new_i32();
+ switch(opsize) {
+ case OS_BYTE:
+ if (sign)
+ tcg_gen_qemu_ld8s(tmp, addr, index);
+ else
+ tcg_gen_qemu_ld8u(tmp, addr, index);
+ break;
+ case OS_WORD:
+ if (sign)
+ tcg_gen_qemu_ld16s(tmp, addr, index);
+ else
+ tcg_gen_qemu_ld16u(tmp, addr, index);
+ break;
+ case OS_LONG:
+ case OS_SINGLE:
+ tcg_gen_qemu_ld32u(tmp, addr, index);
+ break;
+ default:
+ g_assert_not_reached();
+ }
+ gen_throws_exception = gen_last_qop;
+ return tmp;
+}
+
+static inline TCGv_i64 gen_load64(DisasContext * s, TCGv addr)
+{
+ TCGv_i64 tmp;
+ int index = IS_USER(s);
+ tmp = tcg_temp_new_i64();
+ tcg_gen_qemu_ldf64(tmp, addr, index);
+ gen_throws_exception = gen_last_qop;
+ return tmp;
+}
+
+/* Generate a store. */
+static inline void gen_store(DisasContext *s, int opsize, TCGv addr, TCGv val)
+{
+ int index = IS_USER(s);
+ switch(opsize) {
+ case OS_BYTE:
+ tcg_gen_qemu_st8(val, addr, index);
+ break;
+ case OS_WORD:
+ tcg_gen_qemu_st16(val, addr, index);
+ break;
+ case OS_LONG:
+ case OS_SINGLE:
+ tcg_gen_qemu_st32(val, addr, index);
+ break;
+ default:
+ g_assert_not_reached();
+ }
+ gen_throws_exception = gen_last_qop;
+}
+
+static inline void gen_store64(DisasContext *s, TCGv addr, TCGv_i64 val)
+{
+ int index = IS_USER(s);
+ tcg_gen_qemu_stf64(val, addr, index);
+ gen_throws_exception = gen_last_qop;
+}
+
+typedef enum {
+ EA_STORE,
+ EA_LOADU,
+ EA_LOADS
+} ea_what;
+
+/* Generate an unsigned load if VAL is 0 a signed load if val is -1,
+ otherwise generate a store. */
+static TCGv gen_ldst(DisasContext *s, int opsize, TCGv addr, TCGv val,
+ ea_what what)
+{
+ if (what == EA_STORE) {
+ gen_store(s, opsize, addr, val);
+ return store_dummy;
+ } else {
+ return gen_load(s, opsize, addr, what == EA_LOADS);
+ }
+}
+
+/* Read a 16-bit immediate constant */
+static inline uint16_t read_im16(CPUM68KState *env, DisasContext *s)
+{
+ uint16_t im;
+ im = cpu_lduw_code(env, s->pc);
+ s->pc += 2;
+ return im;
+}
+
+/* Read an 8-bit immediate constant */
+static inline uint8_t read_im8(CPUM68KState *env, DisasContext *s)
+{
+ return read_im16(env, s);
+}
+
+/* Read a 32-bit immediate constant. */
+static inline uint32_t read_im32(CPUM68KState *env, DisasContext *s)
+{
+ uint32_t im;
+ im = read_im16(env, s) << 16;
+ im |= 0xffff & read_im16(env, s);
+ return im;
+}
+
+/* Calculate and address index. */
+static TCGv gen_addr_index(uint16_t ext, TCGv tmp)
+{
+ TCGv add;
+ int scale;
+
+ add = (ext & 0x8000) ? AREG(ext, 12) : DREG(ext, 12);
+ if ((ext & 0x800) == 0) {
+ tcg_gen_ext16s_i32(tmp, add);
+ add = tmp;
+ }
+ scale = (ext >> 9) & 3;
+ if (scale != 0) {
+ tcg_gen_shli_i32(tmp, add, scale);
+ add = tmp;
+ }
+ return add;
+}
+
+/* Handle a base + index + displacement effective addresss.
+ A NULL_QREG base means pc-relative. */
+static TCGv gen_lea_indexed(CPUM68KState *env, DisasContext *s, TCGv base)
+{
+ uint32_t offset;
+ uint16_t ext;
+ TCGv add;
+ TCGv tmp;
+ uint32_t bd, od;
+
+ offset = s->pc;
+ ext = read_im16(env, s);
+
+ if ((ext & 0x800) == 0 && !m68k_feature(s->env, M68K_FEATURE_WORD_INDEX))
+ return NULL_QREG;
+
+ if (m68k_feature(s->env, M68K_FEATURE_M68000) &&
+ !m68k_feature(s->env, M68K_FEATURE_SCALED_INDEX)) {
+ ext &= ~(3 << 9);
+ }
+
+ if (ext & 0x100) {
+ /* full extension word format */
+ if (!m68k_feature(s->env, M68K_FEATURE_EXT_FULL))
+ return NULL_QREG;
+
+ if ((ext & 0x30) > 0x10) {
+ /* base displacement */
+ if ((ext & 0x30) == 0x20) {
+ bd = (int16_t)read_im16(env, s);
+ } else {
+ bd = read_im32(env, s);
+ }
+ } else {
+ bd = 0;
+ }
+ tmp = tcg_temp_new();
+ if ((ext & 0x44) == 0) {
+ /* pre-index */
+ add = gen_addr_index(ext, tmp);
+ } else {
+ add = NULL_QREG;
+ }
+ if ((ext & 0x80) == 0) {
+ /* base not suppressed */
+ if (IS_NULL_QREG(base)) {
+ base = tcg_const_i32(offset + bd);
+ bd = 0;
+ }
+ if (!IS_NULL_QREG(add)) {
+ tcg_gen_add_i32(tmp, add, base);
+ add = tmp;
+ } else {
+ add = base;
+ }
+ }
+ if (!IS_NULL_QREG(add)) {
+ if (bd != 0) {
+ tcg_gen_addi_i32(tmp, add, bd);
+ add = tmp;
+ }
+ } else {
+ add = tcg_const_i32(bd);
+ }
+ if ((ext & 3) != 0) {
+ /* memory indirect */
+ base = gen_load(s, OS_LONG, add, 0);
+ if ((ext & 0x44) == 4) {
+ add = gen_addr_index(ext, tmp);
+ tcg_gen_add_i32(tmp, add, base);
+ add = tmp;
+ } else {
+ add = base;
+ }
+ if ((ext & 3) > 1) {
+ /* outer displacement */
+ if ((ext & 3) == 2) {
+ od = (int16_t)read_im16(env, s);
+ } else {
+ od = read_im32(env, s);
+ }
+ } else {
+ od = 0;
+ }
+ if (od != 0) {
+ tcg_gen_addi_i32(tmp, add, od);
+ add = tmp;
+ }
+ }
+ } else {
+ /* brief extension word format */
+ tmp = tcg_temp_new();
+ add = gen_addr_index(ext, tmp);
+ if (!IS_NULL_QREG(base)) {
+ tcg_gen_add_i32(tmp, add, base);
+ if ((int8_t)ext)
+ tcg_gen_addi_i32(tmp, tmp, (int8_t)ext);
+ } else {
+ tcg_gen_addi_i32(tmp, add, offset + (int8_t)ext);
+ }
+ add = tmp;
+ }
+ return add;
+}
+
+/* Sign or zero extend a value. */
+
+static inline void gen_ext(TCGv res, TCGv val, int opsize, int sign)
+{
+ switch (opsize) {
+ case OS_BYTE:
+ if (sign) {
+ tcg_gen_ext8s_i32(res, val);
+ } else {
+ tcg_gen_ext8u_i32(res, val);
+ }
+ break;
+ case OS_WORD:
+ if (sign) {
+ tcg_gen_ext16s_i32(res, val);
+ } else {
+ tcg_gen_ext16u_i32(res, val);
+ }
+ break;
+ case OS_LONG:
+ tcg_gen_mov_i32(res, val);
+ break;
+ default:
+ g_assert_not_reached();
+ }
+}
+
+/* Evaluate all the CC flags. */
+
+static void gen_flush_flags(DisasContext *s)
+{
+ TCGv t0, t1;
+
+ switch (s->cc_op) {
+ case CC_OP_FLAGS:
+ return;
+
+ case CC_OP_ADDB:
+ case CC_OP_ADDW:
+ case CC_OP_ADDL:
+ tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X);
+ tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
+ /* Compute signed overflow for addition. */
+ t0 = tcg_temp_new();
+ t1 = tcg_temp_new();
+ tcg_gen_sub_i32(t0, QREG_CC_N, QREG_CC_V);
+ gen_ext(t0, t0, s->cc_op - CC_OP_ADDB, 1);
+ tcg_gen_xor_i32(t1, QREG_CC_N, QREG_CC_V);
+ tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, t0);
+ tcg_temp_free(t0);
+ tcg_gen_andc_i32(QREG_CC_V, t1, QREG_CC_V);
+ tcg_temp_free(t1);
+ break;
+
+ case CC_OP_SUBB:
+ case CC_OP_SUBW:
+ case CC_OP_SUBL:
+ tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X);
+ tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
+ /* Compute signed overflow for subtraction. */
+ t0 = tcg_temp_new();
+ t1 = tcg_temp_new();
+ tcg_gen_add_i32(t0, QREG_CC_N, QREG_CC_V);
+ gen_ext(t0, t0, s->cc_op - CC_OP_SUBB, 1);
+ tcg_gen_xor_i32(t1, QREG_CC_N, QREG_CC_V);
+ tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, t0);
+ tcg_temp_free(t0);
+ tcg_gen_and_i32(QREG_CC_V, QREG_CC_V, t1);
+ tcg_temp_free(t1);
+ break;
+
+ case CC_OP_CMPB:
+ case CC_OP_CMPW:
+ case CC_OP_CMPL:
+ tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_C, QREG_CC_N, QREG_CC_V);
+ tcg_gen_sub_i32(QREG_CC_Z, QREG_CC_N, QREG_CC_V);
+ gen_ext(QREG_CC_Z, QREG_CC_Z, s->cc_op - CC_OP_CMPB, 1);
+ /* Compute signed overflow for subtraction. */
+ t0 = tcg_temp_new();
+ tcg_gen_xor_i32(t0, QREG_CC_Z, QREG_CC_N);
+ tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, QREG_CC_N);
+ tcg_gen_and_i32(QREG_CC_V, QREG_CC_V, t0);
+ tcg_temp_free(t0);
+ tcg_gen_mov_i32(QREG_CC_N, QREG_CC_Z);
+ break;
+
+ case CC_OP_LOGIC:
+ tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N);
+ tcg_gen_movi_i32(QREG_CC_C, 0);
+ tcg_gen_movi_i32(QREG_CC_V, 0);
+ break;
+
+ case CC_OP_DYNAMIC:
+ gen_helper_flush_flags(cpu_env, QREG_CC_OP);
+ break;
+
+ default:
+ t0 = tcg_const_i32(s->cc_op);
+ gen_helper_flush_flags(cpu_env, t0);
+ tcg_temp_free(t0);
+ break;
+ }
+
+ /* Note that flush_flags also assigned to env->cc_op. */
+ s->cc_op = CC_OP_FLAGS;
+ s->cc_op_synced = 1;
+}
+
+static inline TCGv gen_extend(TCGv val, int opsize, int sign)
+{
+ TCGv tmp;
+
+ if (opsize == OS_LONG) {
+ tmp = val;
+ } else {
+ tmp = tcg_temp_new();
+ gen_ext(tmp, val, opsize, sign);
+ }
+
+ return tmp;
+}
+
+static void gen_logic_cc(DisasContext *s, TCGv val, int opsize)
+{
+ gen_ext(QREG_CC_N, val, opsize, 1);
+ set_cc_op(s, CC_OP_LOGIC);
+}
+
+static void gen_update_cc_cmp(DisasContext *s, TCGv dest, TCGv src, int opsize)
+{
+ tcg_gen_mov_i32(QREG_CC_N, dest);
+ tcg_gen_mov_i32(QREG_CC_V, src);
+ set_cc_op(s, CC_OP_CMPB + opsize);
+}
+
+static void gen_update_cc_add(TCGv dest, TCGv src, int opsize)
+{
+ gen_ext(QREG_CC_N, dest, opsize, 1);
+ tcg_gen_mov_i32(QREG_CC_V, src);
+}
+
+static inline int opsize_bytes(int opsize)
+{
+ switch (opsize) {
+ case OS_BYTE: return 1;
+ case OS_WORD: return 2;
+ case OS_LONG: return 4;
+ case OS_SINGLE: return 4;
+ case OS_DOUBLE: return 8;
+ case OS_EXTENDED: return 12;
+ case OS_PACKED: return 12;
+ default:
+ g_assert_not_reached();
+ }
+}
+
+static inline int insn_opsize(int insn)
+{
+ switch ((insn >> 6) & 3) {
+ case 0: return OS_BYTE;
+ case 1: return OS_WORD;
+ case 2: return OS_LONG;
+ default:
+ g_assert_not_reached();
+ }
+}
+
+/* Assign value to a register. If the width is less than the register width
+ only the low part of the register is set. */
+static void gen_partset_reg(int opsize, TCGv reg, TCGv val)
+{
+ TCGv tmp;
+ switch (opsize) {
+ case OS_BYTE:
+ tcg_gen_andi_i32(reg, reg, 0xffffff00);
+ tmp = tcg_temp_new();
+ tcg_gen_ext8u_i32(tmp, val);
+ tcg_gen_or_i32(reg, reg, tmp);
+ break;
+ case OS_WORD:
+ tcg_gen_andi_i32(reg, reg, 0xffff0000);
+ tmp = tcg_temp_new();
+ tcg_gen_ext16u_i32(tmp, val);
+ tcg_gen_or_i32(reg, reg, tmp);
+ break;
+ case OS_LONG:
+ case OS_SINGLE:
+ tcg_gen_mov_i32(reg, val);
+ break;
+ default:
+ g_assert_not_reached();
+ }
+}
+
+/* Generate code for an "effective address". Does not adjust the base
+ register for autoincrement addressing modes. */
+static TCGv gen_lea(CPUM68KState *env, DisasContext *s, uint16_t insn,
+ int opsize)
+{
+ TCGv reg;
+ TCGv tmp;
+ uint16_t ext;
+ uint32_t offset;
+
+ switch ((insn >> 3) & 7) {
+ case 0: /* Data register direct. */
+ case 1: /* Address register direct. */
+ return NULL_QREG;
+ case 2: /* Indirect register */
+ case 3: /* Indirect postincrement. */
+ return AREG(insn, 0);
+ case 4: /* Indirect predecrememnt. */
+ reg = AREG(insn, 0);
+ tmp = tcg_temp_new();
+ tcg_gen_subi_i32(tmp, reg, opsize_bytes(opsize));
+ return tmp;
+ case 5: /* Indirect displacement. */
+ reg = AREG(insn, 0);
+ tmp = tcg_temp_new();
+ ext = read_im16(env, s);
+ tcg_gen_addi_i32(tmp, reg, (int16_t)ext);
+ return tmp;
+ case 6: /* Indirect index + displacement. */
+ reg = AREG(insn, 0);
+ return gen_lea_indexed(env, s, reg);
+ case 7: /* Other */
+ switch (insn & 7) {
+ case 0: /* Absolute short. */
+ offset = (int16_t)read_im16(env, s);
+ return tcg_const_i32(offset);
+ case 1: /* Absolute long. */
+ offset = read_im32(env, s);
+ return tcg_const_i32(offset);
+ case 2: /* pc displacement */
+ offset = s->pc;
+ offset += (int16_t)read_im16(env, s);
+ return tcg_const_i32(offset);
+ case 3: /* pc index+displacement. */
+ return gen_lea_indexed(env, s, NULL_QREG);
+ case 4: /* Immediate. */
+ default:
+ return NULL_QREG;
+ }
+ }
+ /* Should never happen. */
+ return NULL_QREG;
+}
+
+/* Helper function for gen_ea. Reuse the computed address between the
+ for read/write operands. */
+static inline TCGv gen_ea_once(CPUM68KState *env, DisasContext *s,
+ uint16_t insn, int opsize, TCGv val,
+ TCGv *addrp, ea_what what)
+{
+ TCGv tmp;
+
+ if (addrp && what == EA_STORE) {
+ tmp = *addrp;
+ } else {
+ tmp = gen_lea(env, s, insn, opsize);
+ if (IS_NULL_QREG(tmp))
+ return tmp;
+ if (addrp)
+ *addrp = tmp;
+ }
+ return gen_ldst(s, opsize, tmp, val, what);
+}
+
+/* Generate code to load/store a value from/into an EA. If VAL > 0 this is
+ a write otherwise it is a read (0 == sign extend, -1 == zero extend).
+ ADDRP is non-null for readwrite operands. */
+static TCGv gen_ea(CPUM68KState *env, DisasContext *s, uint16_t insn,
+ int opsize, TCGv val, TCGv *addrp, ea_what what)
+{
+ TCGv reg;
+ TCGv result;
+ uint32_t offset;
+
+ switch ((insn >> 3) & 7) {
+ case 0: /* Data register direct. */
+ reg = DREG(insn, 0);
+ if (what == EA_STORE) {
+ gen_partset_reg(opsize, reg, val);
+ return store_dummy;
+ } else {
+ return gen_extend(reg, opsize, what == EA_LOADS);
+ }
+ case 1: /* Address register direct. */
+ reg = AREG(insn, 0);
+ if (what == EA_STORE) {
+ tcg_gen_mov_i32(reg, val);
+ return store_dummy;
+ } else {
+ return gen_extend(reg, opsize, what == EA_LOADS);
+ }
+ case 2: /* Indirect register */
+ reg = AREG(insn, 0);
+ return gen_ldst(s, opsize, reg, val, what);
+ case 3: /* Indirect postincrement. */
+ reg = AREG(insn, 0);
+ result = gen_ldst(s, opsize, reg, val, what);
+ /* ??? This is not exception safe. The instruction may still
+ fault after this point. */
+ if (what == EA_STORE || !addrp)
+ tcg_gen_addi_i32(reg, reg, opsize_bytes(opsize));
+ return result;
+ case 4: /* Indirect predecrememnt. */
+ {
+ TCGv tmp;
+ if (addrp && what == EA_STORE) {
+ tmp = *addrp;
+ } else {
+ tmp = gen_lea(env, s, insn, opsize);
+ if (IS_NULL_QREG(tmp))
+ return tmp;
+ if (addrp)
+ *addrp = tmp;
+ }
+ result = gen_ldst(s, opsize, tmp, val, what);
+ /* ??? This is not exception safe. The instruction may still
+ fault after this point. */
+ if (what == EA_STORE || !addrp) {
+ reg = AREG(insn, 0);
+ tcg_gen_mov_i32(reg, tmp);
+ }
+ }
+ return result;
+ case 5: /* Indirect displacement. */
+ case 6: /* Indirect index + displacement. */
+ return gen_ea_once(env, s, insn, opsize, val, addrp, what);
+ case 7: /* Other */
+ switch (insn & 7) {
+ case 0: /* Absolute short. */
+ case 1: /* Absolute long. */
+ case 2: /* pc displacement */
+ case 3: /* pc index+displacement. */
+ return gen_ea_once(env, s, insn, opsize, val, addrp, what);
+ case 4: /* Immediate. */
+ /* Sign extend values for consistency. */
+ switch (opsize) {
+ case OS_BYTE:
+ if (what == EA_LOADS) {
+ offset = (int8_t)read_im8(env, s);
+ } else {
+ offset = read_im8(env, s);
+ }
+ break;
+ case OS_WORD:
+ if (what == EA_LOADS) {
+ offset = (int16_t)read_im16(env, s);
+ } else {
+ offset = read_im16(env, s);
+ }
+ break;
+ case OS_LONG:
+ offset = read_im32(env, s);
+ break;
+ default:
+ g_assert_not_reached();
+ }
+ return tcg_const_i32(offset);
+ default:
+ return NULL_QREG;
+ }
+ }
+ /* Should never happen. */
+ return NULL_QREG;
+}
+
+typedef struct {
+ TCGCond tcond;
+ bool g1;
+ bool g2;
+ TCGv v1;
+ TCGv v2;
+} DisasCompare;
+
+static void gen_cc_cond(DisasCompare *c, DisasContext *s, int cond)
+{
+ TCGv tmp, tmp2;
+ TCGCond tcond;
+ CCOp op = s->cc_op;
+
+ /* The CC_OP_CMP form can handle most normal comparisons directly. */
+ if (op == CC_OP_CMPB || op == CC_OP_CMPW || op == CC_OP_CMPL) {
+ c->g1 = c->g2 = 1;
+ c->v1 = QREG_CC_N;
+ c->v2 = QREG_CC_V;
+ switch (cond) {
+ case 2: /* HI */
+ case 3: /* LS */
+ tcond = TCG_COND_LEU;
+ goto done;
+ case 4: /* CC */
+ case 5: /* CS */
+ tcond = TCG_COND_LTU;
+ goto done;
+ case 6: /* NE */
+ case 7: /* EQ */
+ tcond = TCG_COND_EQ;
+ goto done;
+ case 10: /* PL */
+ case 11: /* MI */
+ c->g1 = c->g2 = 0;
+ c->v2 = tcg_const_i32(0);
+ c->v1 = tmp = tcg_temp_new();
+ tcg_gen_sub_i32(tmp, QREG_CC_N, QREG_CC_V);
+ gen_ext(tmp, tmp, op - CC_OP_CMPB, 1);
+ /* fallthru */
+ case 12: /* GE */
+ case 13: /* LT */
+ tcond = TCG_COND_LT;
+ goto done;
+ case 14: /* GT */
+ case 15: /* LE */
+ tcond = TCG_COND_LE;
+ goto done;
+ }
+ }
+
+ c->g1 = 1;
+ c->g2 = 0;
+ c->v2 = tcg_const_i32(0);
+
+ switch (cond) {
+ case 0: /* T */
+ case 1: /* F */
+ c->v1 = c->v2;
+ tcond = TCG_COND_NEVER;
+ goto done;
+ case 14: /* GT (!(Z || (N ^ V))) */
+ case 15: /* LE (Z || (N ^ V)) */
+ /* Logic operations clear V, which simplifies LE to (Z || N),
+ and since Z and N are co-located, this becomes a normal
+ comparison vs N. */
+ if (op == CC_OP_LOGIC) {
+ c->v1 = QREG_CC_N;
+ tcond = TCG_COND_LE;
+ goto done;
+ }
+ break;
+ case 12: /* GE (!(N ^ V)) */
+ case 13: /* LT (N ^ V) */
+ /* Logic operations clear V, which simplifies this to N. */
+ if (op != CC_OP_LOGIC) {
+ break;
+ }
+ /* fallthru */
+ case 10: /* PL (!N) */
+ case 11: /* MI (N) */
+ /* Several cases represent N normally. */
+ if (op == CC_OP_ADDB || op == CC_OP_ADDW || op == CC_OP_ADDL ||
+ op == CC_OP_SUBB || op == CC_OP_SUBW || op == CC_OP_SUBL ||
+ op == CC_OP_LOGIC) {
+ c->v1 = QREG_CC_N;
+ tcond = TCG_COND_LT;
+ goto done;
+ }
+ break;
+ case 6: /* NE (!Z) */
+ case 7: /* EQ (Z) */
+ /* Some cases fold Z into N. */
+ if (op == CC_OP_ADDB || op == CC_OP_ADDW || op == CC_OP_ADDL ||
+ op == CC_OP_SUBB || op == CC_OP_SUBW || op == CC_OP_SUBL ||
+ op == CC_OP_LOGIC) {
+ tcond = TCG_COND_EQ;
+ c->v1 = QREG_CC_N;
+ goto done;
+ }
+ break;
+ case 4: /* CC (!C) */
+ case 5: /* CS (C) */
+ /* Some cases fold C into X. */
+ if (op == CC_OP_ADDB || op == CC_OP_ADDW || op == CC_OP_ADDL ||
+ op == CC_OP_ADDB || op == CC_OP_ADDW || op == CC_OP_ADDL) {
+ tcond = TCG_COND_NE;
+ c->v1 = QREG_CC_X;
+ goto done;
+ }
+ /* fallthru */
+ case 8: /* VC (!V) */
+ case 9: /* VS (V) */
+ /* Logic operations clear V and C. */
+ if (op == CC_OP_LOGIC) {
+ tcond = TCG_COND_NEVER;
+ c->v1 = c->v2;
+ goto done;
+ }
+ break;
+ }
+
+ /* Otherwise, flush flag state to CC_OP_FLAGS. */
+ gen_flush_flags(s);
+
+ switch (cond) {
+ case 0: /* T */
+ case 1: /* F */
+ default:
+ /* Invalid, or handled above. */
+ abort();
+ case 2: /* HI (!C && !Z) -> !(C || Z)*/
+ case 3: /* LS (C || Z) */
+ c->v1 = tmp = tcg_temp_new();
+ c->g1 = 0;
+ tcg_gen_setcond_i32(TCG_COND_EQ, tmp, QREG_CC_Z, c->v2);
+ tcg_gen_or_i32(tmp, tmp, QREG_CC_C);
+ tcond = TCG_COND_NE;
+ break;
+ case 4: /* CC (!C) */
+ case 5: /* CS (C) */
+ c->v1 = QREG_CC_C;
+ tcond = TCG_COND_NE;
+ break;
+ case 6: /* NE (!Z) */
+ case 7: /* EQ (Z) */
+ c->v1 = QREG_CC_Z;
+ tcond = TCG_COND_EQ;
+ break;
+ case 8: /* VC (!V) */
+ case 9: /* VS (V) */
+ c->v1 = QREG_CC_V;
+ tcond = TCG_COND_LT;
+ break;
+ case 10: /* PL (!N) */
+ case 11: /* MI (N) */
+ c->v1 = QREG_CC_N;
+ tcond = TCG_COND_LT;
+ break;
+ case 12: /* GE (!(N ^ V)) */
+ case 13: /* LT (N ^ V) */
+ c->v1 = tmp = tcg_temp_new();
+ c->g1 = 0;
+ tcg_gen_xor_i32(tmp, QREG_CC_N, QREG_CC_V);
+ tcond = TCG_COND_LT;
+ break;
+ case 14: /* GT (!(Z || (N ^ V))) */
+ case 15: /* LE (Z || (N ^ V)) */
+ c->v1 = tmp = tcg_temp_new();
+ c->g1 = 0;
+ tcg_gen_setcond_i32(TCG_COND_EQ, tmp, QREG_CC_Z, c->v2);
+ tcg_gen_neg_i32(tmp, tmp);
+ tmp2 = tcg_temp_new();
+ tcg_gen_xor_i32(tmp2, QREG_CC_N, QREG_CC_V);
+ tcg_gen_or_i32(tmp, tmp, tmp2);
+ tcg_temp_free(tmp2);
+ tcond = TCG_COND_LT;
+ break;
+ }
+
+ done:
+ if ((cond & 1) == 0) {
+ tcond = tcg_invert_cond(tcond);
+ }
+ c->tcond = tcond;
+}
+
+static void free_cond(DisasCompare *c)
+{
+ if (!c->g1) {
+ tcg_temp_free(c->v1);
+ }
+ if (!c->g2) {
+ tcg_temp_free(c->v2);
+ }
+}
+
+static void gen_jmpcc(DisasContext *s, int cond, TCGLabel *l1)
+{
+ DisasCompare c;
+
+ gen_cc_cond(&c, s, cond);
+ update_cc_op(s);
+ tcg_gen_brcond_i32(c.tcond, c.v1, c.v2, l1);
+ free_cond(&c);
+}
+
+/* Force a TB lookup after an instruction that changes the CPU state. */
+static void gen_lookup_tb(DisasContext *s)
+{
+ update_cc_op(s);
+ tcg_gen_movi_i32(QREG_PC, s->pc);
+ s->is_jmp = DISAS_UPDATE;
+}
+
+/* Generate a jump to an immediate address. */
+static void gen_jmp_im(DisasContext *s, uint32_t dest)
+{
+ update_cc_op(s);
+ tcg_gen_movi_i32(QREG_PC, dest);
+ s->is_jmp = DISAS_JUMP;
+}
+
+/* Generate a jump to the address in qreg DEST. */
+static void gen_jmp(DisasContext *s, TCGv dest)
+{
+ update_cc_op(s);
+ tcg_gen_mov_i32(QREG_PC, dest);
+ s->is_jmp = DISAS_JUMP;
+}
+
+static void gen_exception(DisasContext *s, uint32_t where, int nr)
+{
+ update_cc_op(s);
+ gen_jmp_im(s, where);
+ gen_helper_raise_exception(cpu_env, tcg_const_i32(nr));
+}
+
+static inline void gen_addr_fault(DisasContext *s)
+{
+ gen_exception(s, s->insn_pc, EXCP_ADDRESS);
+}
+
+#define SRC_EA(env, result, opsize, op_sign, addrp) do { \
+ result = gen_ea(env, s, insn, opsize, NULL_QREG, addrp, \
+ op_sign ? EA_LOADS : EA_LOADU); \
+ if (IS_NULL_QREG(result)) { \
+ gen_addr_fault(s); \
+ return; \
+ } \
+ } while (0)
+
+#define DEST_EA(env, insn, opsize, val, addrp) do { \
+ TCGv ea_result = gen_ea(env, s, insn, opsize, val, addrp, EA_STORE); \
+ if (IS_NULL_QREG(ea_result)) { \
+ gen_addr_fault(s); \
+ return; \
+ } \
+ } while (0)
+
+static inline bool use_goto_tb(DisasContext *s, uint32_t dest)
+{
+#ifndef CONFIG_USER_ONLY
+ return (s->tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK) ||
+ (s->insn_pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK);
+#else
+ return true;
+#endif
+}
+
+/* Generate a jump to an immediate address. */
+static void gen_jmp_tb(DisasContext *s, int n, uint32_t dest)
+{
+ if (unlikely(s->singlestep_enabled)) {
+ gen_exception(s, dest, EXCP_DEBUG);
+ } else if (use_goto_tb(s, dest)) {
+ tcg_gen_goto_tb(n);
+ tcg_gen_movi_i32(QREG_PC, dest);
+ tcg_gen_exit_tb((uintptr_t)s->tb + n);
+ } else {
+ gen_jmp_im(s, dest);
+ tcg_gen_exit_tb(0);
+ }
+ s->is_jmp = DISAS_TB_JUMP;
+}
+
+DISAS_INSN(scc)
+{
+ DisasCompare c;
+ int cond;
+ TCGv tmp;
+
+ cond = (insn >> 8) & 0xf;
+ gen_cc_cond(&c, s, cond);
+
+ tmp = tcg_temp_new();
+ tcg_gen_setcond_i32(c.tcond, tmp, c.v1, c.v2);
+ free_cond(&c);
+
+ tcg_gen_neg_i32(tmp, tmp);
+ DEST_EA(env, insn, OS_BYTE, tmp, NULL);
+ tcg_temp_free(tmp);
+}
+
+DISAS_INSN(dbcc)
+{
+ TCGLabel *l1;
+ TCGv reg;
+ TCGv tmp;
+ int16_t offset;
+ uint32_t base;
+
+ reg = DREG(insn, 0);
+ base = s->pc;
+ offset = (int16_t)read_im16(env, s);
+ l1 = gen_new_label();
+ gen_jmpcc(s, (insn >> 8) & 0xf, l1);
+
+ tmp = tcg_temp_new();
+ tcg_gen_ext16s_i32(tmp, reg);
+ tcg_gen_addi_i32(tmp, tmp, -1);
+ gen_partset_reg(OS_WORD, reg, tmp);
+ tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, -1, l1);
+ gen_jmp_tb(s, 1, base + offset);
+ gen_set_label(l1);
+ gen_jmp_tb(s, 0, s->pc);
+}
+
+DISAS_INSN(undef_mac)
+{
+ gen_exception(s, s->pc - 2, EXCP_LINEA);
+}
+
+DISAS_INSN(undef_fpu)
+{
+ gen_exception(s, s->pc - 2, EXCP_LINEF);
+}
+
+DISAS_INSN(undef)
+{
+ M68kCPU *cpu = m68k_env_get_cpu(env);
+
+ gen_exception(s, s->pc - 2, EXCP_UNSUPPORTED);
+ cpu_abort(CPU(cpu), "Illegal instruction: %04x @ %08x", insn, s->pc - 2);
+}
+
+DISAS_INSN(mulw)
+{
+ TCGv reg;
+ TCGv tmp;
+ TCGv src;
+ int sign;
+
+ sign = (insn & 0x100) != 0;
+ reg = DREG(insn, 9);
+ tmp = tcg_temp_new();
+ if (sign)
+ tcg_gen_ext16s_i32(tmp, reg);
+ else
+ tcg_gen_ext16u_i32(tmp, reg);
+ SRC_EA(env, src, OS_WORD, sign, NULL);
+ tcg_gen_mul_i32(tmp, tmp, src);
+ tcg_gen_mov_i32(reg, tmp);
+ gen_logic_cc(s, tmp, OS_LONG);
+}
+
+DISAS_INSN(divw)
+{
+ TCGv reg;
+ TCGv tmp;
+ TCGv src;
+ int sign;
+
+ sign = (insn & 0x100) != 0;
+ reg = DREG(insn, 9);
+ if (sign) {
+ tcg_gen_ext16s_i32(QREG_DIV1, reg);
+ } else {
+ tcg_gen_ext16u_i32(QREG_DIV1, reg);
+ }
+ SRC_EA(env, src, OS_WORD, sign, NULL);
+ tcg_gen_mov_i32(QREG_DIV2, src);
+ if (sign) {
+ gen_helper_divs(cpu_env, tcg_const_i32(1));
+ } else {
+ gen_helper_divu(cpu_env, tcg_const_i32(1));
+ }
+
+ tmp = tcg_temp_new();
+ src = tcg_temp_new();
+ tcg_gen_ext16u_i32(tmp, QREG_DIV1);
+ tcg_gen_shli_i32(src, QREG_DIV2, 16);
+ tcg_gen_or_i32(reg, tmp, src);
+
+ set_cc_op(s, CC_OP_FLAGS);
+}
+
+DISAS_INSN(divl)
+{
+ TCGv num;
+ TCGv den;
+ TCGv reg;
+ uint16_t ext;
+
+ ext = read_im16(env, s);
+ if (ext & 0x87f8) {
+ gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED);
+ return;
+ }
+ num = DREG(ext, 12);
+ reg = DREG(ext, 0);
+ tcg_gen_mov_i32(QREG_DIV1, num);
+ SRC_EA(env, den, OS_LONG, 0, NULL);
+ tcg_gen_mov_i32(QREG_DIV2, den);
+ if (ext & 0x0800) {
+ gen_helper_divs(cpu_env, tcg_const_i32(0));
+ } else {
+ gen_helper_divu(cpu_env, tcg_const_i32(0));
+ }
+ if ((ext & 7) == ((ext >> 12) & 7)) {
+ /* div */
+ tcg_gen_mov_i32 (reg, QREG_DIV1);
+ } else {
+ /* rem */
+ tcg_gen_mov_i32 (reg, QREG_DIV2);
+ }
+ set_cc_op(s, CC_OP_FLAGS);
+}
+
+DISAS_INSN(addsub)
+{
+ TCGv reg;
+ TCGv dest;
+ TCGv src;
+ TCGv tmp;
+ TCGv addr;
+ int add;
+ int opsize;
+
+ add = (insn & 0x4000) != 0;
+ opsize = insn_opsize(insn);
+ reg = gen_extend(DREG(insn, 9), opsize, 1);
+ dest = tcg_temp_new();
+ if (insn & 0x100) {
+ SRC_EA(env, tmp, opsize, 1, &addr);
+ src = reg;
+ } else {
+ tmp = reg;
+ SRC_EA(env, src, opsize, 1, NULL);
+ }
+ if (add) {
+ tcg_gen_add_i32(dest, tmp, src);
+ tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, src);
+ set_cc_op(s, CC_OP_ADDB + opsize);
+ } else {
+ tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, tmp, src);
+ tcg_gen_sub_i32(dest, tmp, src);
+ set_cc_op(s, CC_OP_SUBB + opsize);
+ }
+ gen_update_cc_add(dest, src, opsize);
+ if (insn & 0x100) {
+ DEST_EA(env, insn, opsize, dest, &addr);
+ } else {
+ gen_partset_reg(opsize, DREG(insn, 9), dest);
+ }
+ tcg_temp_free(dest);
+}
+
+/* Reverse the order of the bits in REG. */
+DISAS_INSN(bitrev)
+{
+ TCGv reg;
+ reg = DREG(insn, 0);
+ gen_helper_bitrev(reg, reg);
+}
+
+DISAS_INSN(bitop_reg)
+{
+ int opsize;
+ int op;
+ TCGv src1;
+ TCGv src2;
+ TCGv tmp;
+ TCGv addr;
+ TCGv dest;
+
+ if ((insn & 0x38) != 0)
+ opsize = OS_BYTE;
+ else
+ opsize = OS_LONG;
+ op = (insn >> 6) & 3;
+ SRC_EA(env, src1, opsize, 0, op ? &addr: NULL);
+
+ gen_flush_flags(s);
+ src2 = tcg_temp_new();
+ if (opsize == OS_BYTE)
+ tcg_gen_andi_i32(src2, DREG(insn, 9), 7);
+ else
+ tcg_gen_andi_i32(src2, DREG(insn, 9), 31);
+
+ tmp = tcg_const_i32(1);
+ tcg_gen_shl_i32(tmp, tmp, src2);
+ tcg_temp_free(src2);
+
+ tcg_gen_and_i32(QREG_CC_Z, src1, tmp);
+
+ dest = tcg_temp_new();
+ switch (op) {
+ case 1: /* bchg */
+ tcg_gen_xor_i32(dest, src1, tmp);
+ break;
+ case 2: /* bclr */
+ tcg_gen_andc_i32(dest, src1, tmp);
+ break;
+ case 3: /* bset */
+ tcg_gen_or_i32(dest, src1, tmp);
+ break;
+ default: /* btst */
+ break;
+ }
+ tcg_temp_free(tmp);
+ if (op) {
+ DEST_EA(env, insn, opsize, dest, &addr);
+ }
+ tcg_temp_free(dest);
+}
+
+DISAS_INSN(sats)
+{
+ TCGv reg;
+ reg = DREG(insn, 0);
+ gen_flush_flags(s);
+ gen_helper_sats(reg, reg, QREG_CC_V);
+ gen_logic_cc(s, reg, OS_LONG);
+}
+
+static void gen_push(DisasContext *s, TCGv val)
+{
+ TCGv tmp;
+
+ tmp = tcg_temp_new();
+ tcg_gen_subi_i32(tmp, QREG_SP, 4);
+ gen_store(s, OS_LONG, tmp, val);
+ tcg_gen_mov_i32(QREG_SP, tmp);
+}
+
+DISAS_INSN(movem)
+{
+ TCGv addr;
+ int i;
+ uint16_t mask;
+ TCGv reg;
+ TCGv tmp;
+ int is_load;
+
+ mask = read_im16(env, s);
+ tmp = gen_lea(env, s, insn, OS_LONG);
+ if (IS_NULL_QREG(tmp)) {
+ gen_addr_fault(s);
+ return;
+ }
+ addr = tcg_temp_new();
+ tcg_gen_mov_i32(addr, tmp);
+ is_load = ((insn & 0x0400) != 0);
+ for (i = 0; i < 16; i++, mask >>= 1) {
+ if (mask & 1) {
+ if (i < 8)
+ reg = DREG(i, 0);
+ else
+ reg = AREG(i, 0);
+ if (is_load) {
+ tmp = gen_load(s, OS_LONG, addr, 0);
+ tcg_gen_mov_i32(reg, tmp);
+ } else {
+ gen_store(s, OS_LONG, addr, reg);
+ }
+ if (mask != 1)
+ tcg_gen_addi_i32(addr, addr, 4);
+ }
+ }
+}
+
+DISAS_INSN(bitop_im)
+{
+ int opsize;
+ int op;
+ TCGv src1;
+ uint32_t mask;
+ int bitnum;
+ TCGv tmp;
+ TCGv addr;
+
+ if ((insn & 0x38) != 0)
+ opsize = OS_BYTE;
+ else
+ opsize = OS_LONG;
+ op = (insn >> 6) & 3;
+
+ bitnum = read_im16(env, s);
+ if (bitnum & 0xff00) {
+ disas_undef(env, s, insn);
+ return;
+ }
+
+ SRC_EA(env, src1, opsize, 0, op ? &addr: NULL);
+
+ gen_flush_flags(s);
+ if (opsize == OS_BYTE)
+ bitnum &= 7;
+ else
+ bitnum &= 31;
+ mask = 1 << bitnum;
+
+ tcg_gen_andi_i32(QREG_CC_Z, src1, mask);
+
+ if (op) {
+ tmp = tcg_temp_new();
+ switch (op) {
+ case 1: /* bchg */
+ tcg_gen_xori_i32(tmp, src1, mask);
+ break;
+ case 2: /* bclr */
+ tcg_gen_andi_i32(tmp, src1, ~mask);
+ break;
+ case 3: /* bset */
+ tcg_gen_ori_i32(tmp, src1, mask);
+ break;
+ default: /* btst */
+ break;
+ }
+ DEST_EA(env, insn, opsize, tmp, &addr);
+ tcg_temp_free(tmp);
+ }
+}
+
+DISAS_INSN(arith_im)
+{
+ int op;
+ TCGv im;
+ TCGv src1;
+ TCGv dest;
+ TCGv addr;
+ int opsize;
+
+ op = (insn >> 9) & 7;
+ opsize = insn_opsize(insn);
+ switch (opsize) {
+ case OS_BYTE:
+ im = tcg_const_i32((int8_t)read_im8(env, s));
+ break;
+ case OS_WORD:
+ im = tcg_const_i32((int16_t)read_im16(env, s));
+ break;
+ case OS_LONG:
+ im = tcg_const_i32(read_im32(env, s));
+ break;
+ default:
+ abort();
+ }
+ SRC_EA(env, src1, opsize, 1, (op == 6) ? NULL : &addr);
+ dest = tcg_temp_new();
+ switch (op) {
+ case 0: /* ori */
+ tcg_gen_or_i32(dest, src1, im);
+ gen_logic_cc(s, dest, opsize);
+ break;
+ case 1: /* andi */
+ tcg_gen_and_i32(dest, src1, im);
+ gen_logic_cc(s, dest, opsize);
+ break;
+ case 2: /* subi */
+ tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, src1, im);
+ tcg_gen_sub_i32(dest, src1, im);
+ gen_update_cc_add(dest, im, opsize);
+ set_cc_op(s, CC_OP_SUBB + opsize);
+ break;
+ case 3: /* addi */
+ tcg_gen_add_i32(dest, src1, im);
+ gen_update_cc_add(dest, im, opsize);
+ tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, im);
+ set_cc_op(s, CC_OP_ADDB + opsize);
+ break;
+ case 5: /* eori */
+ tcg_gen_xor_i32(dest, src1, im);
+ gen_logic_cc(s, dest, opsize);
+ break;
+ case 6: /* cmpi */
+ gen_update_cc_cmp(s, src1, im, opsize);
+ break;
+ default:
+ abort();
+ }
+ tcg_temp_free(im);
+ if (op != 6) {
+ DEST_EA(env, insn, opsize, dest, &addr);
+ }
+ tcg_temp_free(dest);
+}
+
+DISAS_INSN(byterev)
+{
+ TCGv reg;
+
+ reg = DREG(insn, 0);
+ tcg_gen_bswap32_i32(reg, reg);
+}
+
+DISAS_INSN(move)
+{
+ TCGv src;
+ TCGv dest;
+ int op;
+ int opsize;
+
+ switch (insn >> 12) {
+ case 1: /* move.b */
+ opsize = OS_BYTE;
+ break;
+ case 2: /* move.l */
+ opsize = OS_LONG;
+ break;
+ case 3: /* move.w */
+ opsize = OS_WORD;
+ break;
+ default:
+ abort();
+ }
+ SRC_EA(env, src, opsize, 1, NULL);
+ op = (insn >> 6) & 7;
+ if (op == 1) {
+ /* movea */
+ /* The value will already have been sign extended. */
+ dest = AREG(insn, 9);
+ tcg_gen_mov_i32(dest, src);
+ } else {
+ /* normal move */
+ uint16_t dest_ea;
+ dest_ea = ((insn >> 9) & 7) | (op << 3);
+ DEST_EA(env, dest_ea, opsize, src, NULL);
+ /* This will be correct because loads sign extend. */
+ gen_logic_cc(s, src, opsize);
+ }
+}
+
+DISAS_INSN(negx)
+{
+ TCGv z;
+ TCGv src;
+ TCGv addr;
+ int opsize;
+
+ opsize = insn_opsize(insn);
+ SRC_EA(env, src, opsize, 1, &addr);
+
+ gen_flush_flags(s); /* compute old Z */
+
+ /* Perform substract with borrow.
+ * (X, N) = -(src + X);
+ */
+
+ z = tcg_const_i32(0);
+ tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, src, z, QREG_CC_X, z);
+ tcg_gen_sub2_i32(QREG_CC_N, QREG_CC_X, z, z, QREG_CC_N, QREG_CC_X);
+ tcg_temp_free(z);
+ gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1);
+
+ tcg_gen_andi_i32(QREG_CC_X, QREG_CC_X, 1);
+
+ /* Compute signed-overflow for negation. The normal formula for
+ * subtraction is (res ^ src) & (src ^ dest), but with dest==0
+ * this simplies to res & src.
+ */
+
+ tcg_gen_and_i32(QREG_CC_V, QREG_CC_N, src);
+
+ /* Copy the rest of the results into place. */
+ tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_N); /* !Z is sticky */
+ tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X);
+
+ set_cc_op(s, CC_OP_FLAGS);
+
+ /* result is in QREG_CC_N */
+
+ DEST_EA(env, insn, opsize, QREG_CC_N, &addr);
+}
+
+DISAS_INSN(lea)
+{
+ TCGv reg;
+ TCGv tmp;
+
+ reg = AREG(insn, 9);
+ tmp = gen_lea(env, s, insn, OS_LONG);
+ if (IS_NULL_QREG(tmp)) {
+ gen_addr_fault(s);
+ return;
+ }
+ tcg_gen_mov_i32(reg, tmp);
+}
+
+DISAS_INSN(clr)
+{
+ int opsize;
+
+ opsize = insn_opsize(insn);
+ DEST_EA(env, insn, opsize, tcg_const_i32(0), NULL);
+ gen_logic_cc(s, tcg_const_i32(0), opsize);
+}
+
+static TCGv gen_get_ccr(DisasContext *s)
+{
+ TCGv dest;
+
+ gen_flush_flags(s);
+ update_cc_op(s);
+ dest = tcg_temp_new();
+ gen_helper_get_ccr(dest, cpu_env);
+ return dest;
+}
+
+DISAS_INSN(move_from_ccr)
+{
+ TCGv ccr;
+
+ ccr = gen_get_ccr(s);
+ DEST_EA(env, insn, OS_WORD, ccr, NULL);
+}
+
+DISAS_INSN(neg)
+{
+ TCGv src1;
+ TCGv dest;
+ TCGv addr;
+ int opsize;
+
+ opsize = insn_opsize(insn);
+ SRC_EA(env, src1, opsize, 1, &addr);
+ dest = tcg_temp_new();
+ tcg_gen_neg_i32(dest, src1);
+ set_cc_op(s, CC_OP_SUBB + opsize);
+ gen_update_cc_add(dest, src1, opsize);
+ tcg_gen_setcondi_i32(TCG_COND_NE, QREG_CC_X, dest, 0);
+ DEST_EA(env, insn, opsize, dest, &addr);
+ tcg_temp_free(dest);
+}
+
+static void gen_set_sr_im(DisasContext *s, uint16_t val, int ccr_only)
+{
+ if (ccr_only) {
+ tcg_gen_movi_i32(QREG_CC_C, val & CCF_C ? 1 : 0);
+ tcg_gen_movi_i32(QREG_CC_V, val & CCF_V ? -1 : 0);
+ tcg_gen_movi_i32(QREG_CC_Z, val & CCF_Z ? 0 : 1);
+ tcg_gen_movi_i32(QREG_CC_N, val & CCF_N ? -1 : 0);
+ tcg_gen_movi_i32(QREG_CC_X, val & CCF_X ? 1 : 0);
+ } else {
+ gen_helper_set_sr(cpu_env, tcg_const_i32(val));
+ }
+ set_cc_op(s, CC_OP_FLAGS);
+}
+
+static void gen_set_sr(CPUM68KState *env, DisasContext *s, uint16_t insn,
+ int ccr_only)
+{
+ if ((insn & 0x38) == 0) {
+ if (ccr_only) {
+ gen_helper_set_ccr(cpu_env, DREG(insn, 0));
+ } else {
+ gen_helper_set_sr(cpu_env, DREG(insn, 0));
+ }
+ set_cc_op(s, CC_OP_FLAGS);
+ } else if ((insn & 0x3f) == 0x3c) {
+ uint16_t val;
+ val = read_im16(env, s);
+ gen_set_sr_im(s, val, ccr_only);
+ } else {
+ disas_undef(env, s, insn);
+ }
+}
+
+
+DISAS_INSN(move_to_ccr)
+{
+ gen_set_sr(env, s, insn, 1);
+}
+
+DISAS_INSN(not)
+{
+ TCGv src1;
+ TCGv dest;
+ TCGv addr;
+ int opsize;
+
+ opsize = insn_opsize(insn);
+ SRC_EA(env, src1, opsize, 1, &addr);
+ dest = tcg_temp_new();
+ tcg_gen_not_i32(dest, src1);
+ DEST_EA(env, insn, opsize, dest, &addr);
+ gen_logic_cc(s, dest, opsize);
+}
+
+DISAS_INSN(swap)
+{
+ TCGv src1;
+ TCGv src2;
+ TCGv reg;
+
+ src1 = tcg_temp_new();
+ src2 = tcg_temp_new();
+ reg = DREG(insn, 0);
+ tcg_gen_shli_i32(src1, reg, 16);
+ tcg_gen_shri_i32(src2, reg, 16);
+ tcg_gen_or_i32(reg, src1, src2);
+ gen_logic_cc(s, reg, OS_LONG);
+}
+
+DISAS_INSN(bkpt)
+{
+ gen_exception(s, s->pc - 2, EXCP_DEBUG);
+}
+
+DISAS_INSN(pea)
+{
+ TCGv tmp;
+
+ tmp = gen_lea(env, s, insn, OS_LONG);
+ if (IS_NULL_QREG(tmp)) {
+ gen_addr_fault(s);
+ return;
+ }
+ gen_push(s, tmp);
+}
+
+DISAS_INSN(ext)
+{
+ int op;
+ TCGv reg;
+ TCGv tmp;
+
+ reg = DREG(insn, 0);
+ op = (insn >> 6) & 7;
+ tmp = tcg_temp_new();
+ if (op == 3)
+ tcg_gen_ext16s_i32(tmp, reg);
+ else
+ tcg_gen_ext8s_i32(tmp, reg);
+ if (op == 2)
+ gen_partset_reg(OS_WORD, reg, tmp);
+ else
+ tcg_gen_mov_i32(reg, tmp);
+ gen_logic_cc(s, tmp, OS_LONG);
+}
+
+DISAS_INSN(tst)
+{
+ int opsize;
+ TCGv tmp;
+
+ opsize = insn_opsize(insn);
+ SRC_EA(env, tmp, opsize, 1, NULL);
+ gen_logic_cc(s, tmp, opsize);
+}
+
+DISAS_INSN(pulse)
+{
+ /* Implemented as a NOP. */
+}
+
+DISAS_INSN(illegal)
+{
+ gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
+}
+
+/* ??? This should be atomic. */
+DISAS_INSN(tas)
+{
+ TCGv dest;
+ TCGv src1;
+ TCGv addr;
+
+ dest = tcg_temp_new();
+ SRC_EA(env, src1, OS_BYTE, 1, &addr);
+ gen_logic_cc(s, src1, OS_BYTE);
+ tcg_gen_ori_i32(dest, src1, 0x80);
+ DEST_EA(env, insn, OS_BYTE, dest, &addr);
+}
+
+DISAS_INSN(mull)
+{
+ uint16_t ext;
+ TCGv reg;
+ TCGv src1;
+ TCGv dest;
+
+ /* The upper 32 bits of the product are discarded, so
+ muls.l and mulu.l are functionally equivalent. */
+ ext = read_im16(env, s);
+ if (ext & 0x87ff) {
+ gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED);
+ return;
+ }
+ reg = DREG(ext, 12);
+ SRC_EA(env, src1, OS_LONG, 0, NULL);
+ dest = tcg_temp_new();
+ tcg_gen_mul_i32(dest, src1, reg);
+ tcg_gen_mov_i32(reg, dest);
+ /* Unlike m68k, coldfire always clears the overflow bit. */
+ gen_logic_cc(s, dest, OS_LONG);
+}
+
+static void gen_link(DisasContext *s, uint16_t insn, int32_t offset)
+{
+ TCGv reg;
+ TCGv tmp;
+
+ reg = AREG(insn, 0);
+ tmp = tcg_temp_new();
+ tcg_gen_subi_i32(tmp, QREG_SP, 4);
+ gen_store(s, OS_LONG, tmp, reg);
+ if ((insn & 7) != 7) {
+ tcg_gen_mov_i32(reg, tmp);
+ }
+ tcg_gen_addi_i32(QREG_SP, tmp, offset);
+ tcg_temp_free(tmp);
+}
+
+DISAS_INSN(link)
+{
+ int16_t offset;
+
+ offset = read_im16(env, s);
+ gen_link(s, insn, offset);
+}
+
+DISAS_INSN(linkl)
+{
+ int32_t offset;
+
+ offset = read_im32(env, s);
+ gen_link(s, insn, offset);
+}
+
+DISAS_INSN(unlk)
+{
+ TCGv src;
+ TCGv reg;
+ TCGv tmp;
+
+ src = tcg_temp_new();
+ reg = AREG(insn, 0);
+ tcg_gen_mov_i32(src, reg);
+ tmp = gen_load(s, OS_LONG, src, 0);
+ tcg_gen_mov_i32(reg, tmp);
+ tcg_gen_addi_i32(QREG_SP, src, 4);
+}
+
+DISAS_INSN(nop)
+{
+}
+
+DISAS_INSN(rts)
+{
+ TCGv tmp;
+
+ tmp = gen_load(s, OS_LONG, QREG_SP, 0);
+ tcg_gen_addi_i32(QREG_SP, QREG_SP, 4);
+ gen_jmp(s, tmp);
+}
+
+DISAS_INSN(jump)
+{
+ TCGv tmp;
+
+ /* Load the target address first to ensure correct exception
+ behavior. */
+ tmp = gen_lea(env, s, insn, OS_LONG);
+ if (IS_NULL_QREG(tmp)) {
+ gen_addr_fault(s);
+ return;
+ }
+ if ((insn & 0x40) == 0) {
+ /* jsr */
+ gen_push(s, tcg_const_i32(s->pc));
+ }
+ gen_jmp(s, tmp);
+}
+
+DISAS_INSN(addsubq)
+{
+ TCGv src;
+ TCGv dest;
+ TCGv val;
+ int imm;
+ TCGv addr;
+ int opsize;
+
+ if ((insn & 070) == 010) {
+ /* Operation on address register is always long. */
+ opsize = OS_LONG;
+ } else {
+ opsize = insn_opsize(insn);
+ }
+ SRC_EA(env, src, opsize, 1, &addr);
+ imm = (insn >> 9) & 7;
+ if (imm == 0) {
+ imm = 8;
+ }
+ val = tcg_const_i32(imm);
+ dest = tcg_temp_new();
+ tcg_gen_mov_i32(dest, src);
+ if ((insn & 0x38) == 0x08) {
+ /* Don't update condition codes if the destination is an
+ address register. */
+ if (insn & 0x0100) {
+ tcg_gen_sub_i32(dest, dest, val);
+ } else {
+ tcg_gen_add_i32(dest, dest, val);
+ }
+ } else {
+ if (insn & 0x0100) {
+ tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, val);
+ tcg_gen_sub_i32(dest, dest, val);
+ set_cc_op(s, CC_OP_SUBB + opsize);
+ } else {
+ tcg_gen_add_i32(dest, dest, val);
+ tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, val);
+ set_cc_op(s, CC_OP_ADDB + opsize);
+ }
+ gen_update_cc_add(dest, val, opsize);
+ }
+ DEST_EA(env, insn, opsize, dest, &addr);
+}
+
+DISAS_INSN(tpf)
+{
+ switch (insn & 7) {
+ case 2: /* One extension word. */
+ s->pc += 2;
+ break;
+ case 3: /* Two extension words. */
+ s->pc += 4;
+ break;
+ case 4: /* No extension words. */
+ break;
+ default:
+ disas_undef(env, s, insn);
+ }
+}
+
+DISAS_INSN(branch)
+{
+ int32_t offset;
+ uint32_t base;
+ int op;
+ TCGLabel *l1;
+
+ base = s->pc;
+ op = (insn >> 8) & 0xf;
+ offset = (int8_t)insn;
+ if (offset == 0) {
+ offset = (int16_t)read_im16(env, s);
+ } else if (offset == -1) {
+ offset = read_im32(env, s);
+ }
+ if (op == 1) {
+ /* bsr */
+ gen_push(s, tcg_const_i32(s->pc));
+ }
+ if (op > 1) {
+ /* Bcc */
+ l1 = gen_new_label();
+ gen_jmpcc(s, ((insn >> 8) & 0xf) ^ 1, l1);
+ gen_jmp_tb(s, 1, base + offset);
+ gen_set_label(l1);
+ gen_jmp_tb(s, 0, s->pc);
+ } else {
+ /* Unconditional branch. */
+ gen_jmp_tb(s, 0, base + offset);
+ }
+}
+
+DISAS_INSN(moveq)
+{
+ uint32_t val;
+
+ val = (int8_t)insn;
+ tcg_gen_movi_i32(DREG(insn, 9), val);
+ gen_logic_cc(s, tcg_const_i32(val), OS_LONG);
+}
+
+DISAS_INSN(mvzs)
+{
+ int opsize;
+ TCGv src;
+ TCGv reg;
+
+ if (insn & 0x40)
+ opsize = OS_WORD;
+ else
+ opsize = OS_BYTE;
+ SRC_EA(env, src, opsize, (insn & 0x80) == 0, NULL);
+ reg = DREG(insn, 9);
+ tcg_gen_mov_i32(reg, src);
+ gen_logic_cc(s, src, opsize);
+}
+
+DISAS_INSN(or)
+{
+ TCGv reg;
+ TCGv dest;
+ TCGv src;
+ TCGv addr;
+ int opsize;
+
+ opsize = insn_opsize(insn);
+ reg = gen_extend(DREG(insn, 9), opsize, 0);
+ dest = tcg_temp_new();
+ if (insn & 0x100) {
+ SRC_EA(env, src, opsize, 0, &addr);
+ tcg_gen_or_i32(dest, src, reg);
+ DEST_EA(env, insn, opsize, dest, &addr);
+ } else {
+ SRC_EA(env, src, opsize, 0, NULL);
+ tcg_gen_or_i32(dest, src, reg);
+ gen_partset_reg(opsize, DREG(insn, 9), dest);
+ }
+ gen_logic_cc(s, dest, opsize);
+}
+
+DISAS_INSN(suba)
+{
+ TCGv src;
+ TCGv reg;
+
+ SRC_EA(env, src, (insn & 0x100) ? OS_LONG : OS_WORD, 1, NULL);
+ reg = AREG(insn, 9);
+ tcg_gen_sub_i32(reg, reg, src);
+}
+
+static inline void gen_subx(DisasContext *s, TCGv src, TCGv dest, int opsize)
+{
+ TCGv tmp;
+
+ gen_flush_flags(s); /* compute old Z */
+
+ /* Perform substract with borrow.
+ * (X, N) = dest - (src + X);
+ */
+
+ tmp = tcg_const_i32(0);
+ tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, src, tmp, QREG_CC_X, tmp);
+ tcg_gen_sub2_i32(QREG_CC_N, QREG_CC_X, dest, tmp, QREG_CC_N, QREG_CC_X);
+ gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1);
+ tcg_gen_andi_i32(QREG_CC_X, QREG_CC_X, 1);
+
+ /* Compute signed-overflow for substract. */
+
+ tcg_gen_xor_i32(QREG_CC_V, QREG_CC_N, dest);
+ tcg_gen_xor_i32(tmp, dest, src);
+ tcg_gen_and_i32(QREG_CC_V, QREG_CC_V, tmp);
+ tcg_temp_free(tmp);
+
+ /* Copy the rest of the results into place. */
+ tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_N); /* !Z is sticky */
+ tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X);
+
+ set_cc_op(s, CC_OP_FLAGS);
+
+ /* result is in QREG_CC_N */
+}
+
+DISAS_INSN(subx_reg)
+{
+ TCGv dest;
+ TCGv src;
+ int opsize;
+
+ opsize = insn_opsize(insn);
+
+ src = gen_extend(DREG(insn, 0), opsize, 1);
+ dest = gen_extend(DREG(insn, 9), opsize, 1);
+
+ gen_subx(s, src, dest, opsize);
+
+ gen_partset_reg(opsize, DREG(insn, 9), QREG_CC_N);
+}
+
+DISAS_INSN(subx_mem)
+{
+ TCGv src;
+ TCGv addr_src;
+ TCGv dest;
+ TCGv addr_dest;
+ int opsize;
+
+ opsize = insn_opsize(insn);
+
+ addr_src = AREG(insn, 0);
+ tcg_gen_subi_i32(addr_src, addr_src, opsize);
+ src = gen_load(s, opsize, addr_src, 1);
+
+ addr_dest = AREG(insn, 9);
+ tcg_gen_subi_i32(addr_dest, addr_dest, opsize);
+ dest = gen_load(s, opsize, addr_dest, 1);
+
+ gen_subx(s, src, dest, opsize);
+
+ gen_store(s, opsize, addr_dest, QREG_CC_N);
+}
+
+DISAS_INSN(mov3q)
+{
+ TCGv src;
+ int val;
+
+ val = (insn >> 9) & 7;
+ if (val == 0)
+ val = -1;
+ src = tcg_const_i32(val);
+ gen_logic_cc(s, src, OS_LONG);
+ DEST_EA(env, insn, OS_LONG, src, NULL);
+}
+
+DISAS_INSN(cmp)
+{
+ TCGv src;
+ TCGv reg;
+ int opsize;
+
+ opsize = insn_opsize(insn);
+ SRC_EA(env, src, opsize, 1, NULL);
+ reg = gen_extend(DREG(insn, 9), opsize, 1);
+ gen_update_cc_cmp(s, reg, src, opsize);
+}
+
+DISAS_INSN(cmpa)
+{
+ int opsize;
+ TCGv src;
+ TCGv reg;
+
+ if (insn & 0x100) {
+ opsize = OS_LONG;
+ } else {
+ opsize = OS_WORD;
+ }
+ SRC_EA(env, src, opsize, 1, NULL);
+ reg = AREG(insn, 9);
+ gen_update_cc_cmp(s, reg, src, OS_LONG);
+}
+
+DISAS_INSN(eor)
+{
+ TCGv src;
+ TCGv dest;
+ TCGv addr;
+ int opsize;
+
+ opsize = insn_opsize(insn);
+
+ SRC_EA(env, src, opsize, 0, &addr);
+ dest = tcg_temp_new();
+ tcg_gen_xor_i32(dest, src, DREG(insn, 9));
+ gen_logic_cc(s, dest, opsize);
+ DEST_EA(env, insn, opsize, dest, &addr);
+}
+
+static void do_exg(TCGv reg1, TCGv reg2)
+{
+ TCGv temp = tcg_temp_new();
+ tcg_gen_mov_i32(temp, reg1);
+ tcg_gen_mov_i32(reg1, reg2);
+ tcg_gen_mov_i32(reg2, temp);
+ tcg_temp_free(temp);
+}
+
+DISAS_INSN(exg_dd)
+{
+ /* exchange Dx and Dy */
+ do_exg(DREG(insn, 9), DREG(insn, 0));
+}
+
+DISAS_INSN(exg_aa)
+{
+ /* exchange Ax and Ay */
+ do_exg(AREG(insn, 9), AREG(insn, 0));
+}
+
+DISAS_INSN(exg_da)
+{
+ /* exchange Dx and Ay */
+ do_exg(DREG(insn, 9), AREG(insn, 0));
+}
+
+DISAS_INSN(and)
+{
+ TCGv src;
+ TCGv reg;
+ TCGv dest;
+ TCGv addr;
+ int opsize;
+
+ dest = tcg_temp_new();
+
+ opsize = insn_opsize(insn);
+ reg = DREG(insn, 9);
+ if (insn & 0x100) {
+ SRC_EA(env, src, opsize, 0, &addr);
+ tcg_gen_and_i32(dest, src, reg);
+ DEST_EA(env, insn, opsize, dest, &addr);
+ } else {
+ SRC_EA(env, src, opsize, 0, NULL);
+ tcg_gen_and_i32(dest, src, reg);
+ gen_partset_reg(opsize, reg, dest);
+ }
+ tcg_temp_free(dest);
+ gen_logic_cc(s, dest, opsize);
+}
+
+DISAS_INSN(adda)
+{
+ TCGv src;
+ TCGv reg;
+
+ SRC_EA(env, src, (insn & 0x100) ? OS_LONG : OS_WORD, 1, NULL);
+ reg = AREG(insn, 9);
+ tcg_gen_add_i32(reg, reg, src);
+}
+
+static inline void gen_addx(DisasContext *s, TCGv src, TCGv dest, int opsize)
+{
+ TCGv tmp;
+
+ gen_flush_flags(s); /* compute old Z */
+
+ /* Perform addition with carry.
+ * (X, N) = src + dest + X;
+ */
+
+ tmp = tcg_const_i32(0);
+ tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, QREG_CC_X, tmp, dest, tmp);
+ tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, QREG_CC_N, QREG_CC_X, src, tmp);
+ gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1);
+
+ /* Compute signed-overflow for addition. */
+
+ tcg_gen_xor_i32(QREG_CC_V, QREG_CC_N, src);
+ tcg_gen_xor_i32(tmp, dest, src);
+ tcg_gen_andc_i32(QREG_CC_V, QREG_CC_V, tmp);
+ tcg_temp_free(tmp);
+
+ /* Copy the rest of the results into place. */
+ tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_N); /* !Z is sticky */
+ tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X);
+
+ set_cc_op(s, CC_OP_FLAGS);
+
+ /* result is in QREG_CC_N */
+}
+
+DISAS_INSN(addx_reg)
+{
+ TCGv dest;
+ TCGv src;
+ int opsize;
+
+ opsize = insn_opsize(insn);
+
+ dest = gen_extend(DREG(insn, 9), opsize, 1);
+ src = gen_extend(DREG(insn, 0), opsize, 1);
+
+ gen_addx(s, src, dest, opsize);
+
+ gen_partset_reg(opsize, DREG(insn, 9), QREG_CC_N);
+}
+
+DISAS_INSN(addx_mem)
+{
+ TCGv src;
+ TCGv addr_src;
+ TCGv dest;
+ TCGv addr_dest;
+ int opsize;
+
+ opsize = insn_opsize(insn);
+
+ addr_src = AREG(insn, 0);
+ tcg_gen_subi_i32(addr_src, addr_src, opsize_bytes(opsize));
+ src = gen_load(s, opsize, addr_src, 1);
+
+ addr_dest = AREG(insn, 9);
+ tcg_gen_subi_i32(addr_dest, addr_dest, opsize_bytes(opsize));
+ dest = gen_load(s, opsize, addr_dest, 1);
+
+ gen_addx(s, src, dest, opsize);
+
+ gen_store(s, opsize, addr_dest, QREG_CC_N);
+}
+
+/* TODO: This could be implemented without helper functions. */
+DISAS_INSN(shift_im)
+{
+ TCGv reg;
+ int tmp;
+ TCGv shift;
+
+ set_cc_op(s, CC_OP_FLAGS);
+
+ reg = DREG(insn, 0);
+ tmp = (insn >> 9) & 7;
+ if (tmp == 0)
+ tmp = 8;
+ shift = tcg_const_i32(tmp);
+ /* No need to flush flags becuse we know we will set C flag. */
+ if (insn & 0x100) {
+ gen_helper_shl_cc(reg, cpu_env, reg, shift);
+ } else {
+ if (insn & 8) {
+ gen_helper_shr_cc(reg, cpu_env, reg, shift);
+ } else {
+ gen_helper_sar_cc(reg, cpu_env, reg, shift);
+ }
+ }
+}
+
+DISAS_INSN(shift_reg)
+{
+ TCGv reg;
+ TCGv shift;
+
+ reg = DREG(insn, 0);
+ shift = DREG(insn, 9);
+ if (insn & 0x100) {
+ gen_helper_shl_cc(reg, cpu_env, reg, shift);
+ } else {
+ if (insn & 8) {
+ gen_helper_shr_cc(reg, cpu_env, reg, shift);
+ } else {
+ gen_helper_sar_cc(reg, cpu_env, reg, shift);
+ }
+ }
+ set_cc_op(s, CC_OP_FLAGS);
+}
+
+DISAS_INSN(ff1)
+{
+ TCGv reg;
+ reg = DREG(insn, 0);
+ gen_logic_cc(s, reg, OS_LONG);
+ gen_helper_ff1(reg, reg);
+}
+
+static TCGv gen_get_sr(DisasContext *s)
+{
+ TCGv ccr;
+ TCGv sr;
+
+ ccr = gen_get_ccr(s);
+ sr = tcg_temp_new();
+ tcg_gen_andi_i32(sr, QREG_SR, 0xffe0);
+ tcg_gen_or_i32(sr, sr, ccr);
+ return sr;
+}
+
+DISAS_INSN(strldsr)
+{
+ uint16_t ext;
+ uint32_t addr;
+
+ addr = s->pc - 2;
+ ext = read_im16(env, s);
+ if (ext != 0x46FC) {
+ gen_exception(s, addr, EXCP_UNSUPPORTED);
+ return;
+ }
+ ext = read_im16(env, s);
+ if (IS_USER(s) || (ext & SR_S) == 0) {
+ gen_exception(s, addr, EXCP_PRIVILEGE);
+ return;
+ }
+ gen_push(s, gen_get_sr(s));
+ gen_set_sr_im(s, ext, 0);
+}
+
+DISAS_INSN(move_from_sr)
+{
+ TCGv sr;
+
+ if (IS_USER(s) && !m68k_feature(env, M68K_FEATURE_M68000)) {
+ gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
+ return;
+ }
+ sr = gen_get_sr(s);
+ DEST_EA(env, insn, OS_WORD, sr, NULL);
+}
+
+DISAS_INSN(move_to_sr)
+{
+ if (IS_USER(s)) {
+ gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
+ return;
+ }
+ gen_set_sr(env, s, insn, 0);
+ gen_lookup_tb(s);
+}
+
+DISAS_INSN(move_from_usp)
+{
+ if (IS_USER(s)) {
+ gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
+ return;
+ }
+ tcg_gen_ld_i32(AREG(insn, 0), cpu_env,
+ offsetof(CPUM68KState, sp[M68K_USP]));
+}
+
+DISAS_INSN(move_to_usp)
+{
+ if (IS_USER(s)) {
+ gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
+ return;
+ }
+ tcg_gen_st_i32(AREG(insn, 0), cpu_env,
+ offsetof(CPUM68KState, sp[M68K_USP]));
+}
+
+DISAS_INSN(halt)
+{
+ gen_exception(s, s->pc, EXCP_HALT_INSN);
+}
+
+DISAS_INSN(stop)
+{
+ uint16_t ext;
+
+ if (IS_USER(s)) {
+ gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
+ return;
+ }
+
+ ext = read_im16(env, s);
+
+ gen_set_sr_im(s, ext, 0);
+ tcg_gen_movi_i32(cpu_halted, 1);
+ gen_exception(s, s->pc, EXCP_HLT);
+}
+
+DISAS_INSN(rte)
+{
+ if (IS_USER(s)) {
+ gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
+ return;
+ }
+ gen_exception(s, s->pc - 2, EXCP_RTE);
+}
+
+DISAS_INSN(movec)
+{
+ uint16_t ext;
+ TCGv reg;
+
+ if (IS_USER(s)) {
+ gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
+ return;
+ }
+
+ ext = read_im16(env, s);
+
+ if (ext & 0x8000) {
+ reg = AREG(ext, 12);
+ } else {
+ reg = DREG(ext, 12);
+ }
+ gen_helper_movec(cpu_env, tcg_const_i32(ext & 0xfff), reg);
+ gen_lookup_tb(s);
+}
+
+DISAS_INSN(intouch)
+{
+ if (IS_USER(s)) {
+ gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
+ return;
+ }
+ /* ICache fetch. Implement as no-op. */
+}
+
+DISAS_INSN(cpushl)
+{
+ if (IS_USER(s)) {
+ gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
+ return;
+ }
+ /* Cache push/invalidate. Implement as no-op. */
+}
+
+DISAS_INSN(wddata)
+{
+ gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
+}
+
+DISAS_INSN(wdebug)
+{
+ M68kCPU *cpu = m68k_env_get_cpu(env);
+
+ if (IS_USER(s)) {
+ gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
+ return;
+ }
+ /* TODO: Implement wdebug. */
+ cpu_abort(CPU(cpu), "WDEBUG not implemented");
+}
+
+DISAS_INSN(trap)
+{
+ gen_exception(s, s->pc - 2, EXCP_TRAP0 + (insn & 0xf));
+}
+
+/* ??? FP exceptions are not implemented. Most exceptions are deferred until
+ immediately before the next FP instruction is executed. */
+DISAS_INSN(fpu)
+{
+ uint16_t ext;
+ int32_t offset;
+ int opmode;
+ TCGv_i64 src;
+ TCGv_i64 dest;
+ TCGv_i64 res;
+ TCGv tmp32;
+ int round;
+ int set_dest;
+ int opsize;
+
+ ext = read_im16(env, s);
+ opmode = ext & 0x7f;
+ switch ((ext >> 13) & 7) {
+ case 0: case 2:
+ break;
+ case 1:
+ goto undef;
+ case 3: /* fmove out */
+ src = FREG(ext, 7);
+ tmp32 = tcg_temp_new_i32();
+ /* fmove */
+ /* ??? TODO: Proper behavior on overflow. */
+ switch ((ext >> 10) & 7) {
+ case 0:
+ opsize = OS_LONG;
+ gen_helper_f64_to_i32(tmp32, cpu_env, src);
+ break;
+ case 1:
+ opsize = OS_SINGLE;
+ gen_helper_f64_to_f32(tmp32, cpu_env, src);
+ break;
+ case 4:
+ opsize = OS_WORD;
+ gen_helper_f64_to_i32(tmp32, cpu_env, src);
+ break;
+ case 5: /* OS_DOUBLE */
+ tcg_gen_mov_i32(tmp32, AREG(insn, 0));
+ switch ((insn >> 3) & 7) {
+ case 2:
+ case 3:
+ break;
+ case 4:
+ tcg_gen_addi_i32(tmp32, tmp32, -8);
+ break;
+ case 5:
+ offset = cpu_ldsw_code(env, s->pc);
+ s->pc += 2;
+ tcg_gen_addi_i32(tmp32, tmp32, offset);
+ break;
+ default:
+ goto undef;
+ }
+ gen_store64(s, tmp32, src);
+ switch ((insn >> 3) & 7) {
+ case 3:
+ tcg_gen_addi_i32(tmp32, tmp32, 8);
+ tcg_gen_mov_i32(AREG(insn, 0), tmp32);
+ break;
+ case 4:
+ tcg_gen_mov_i32(AREG(insn, 0), tmp32);
+ break;
+ }
+ tcg_temp_free_i32(tmp32);
+ return;
+ case 6:
+ opsize = OS_BYTE;
+ gen_helper_f64_to_i32(tmp32, cpu_env, src);
+ break;
+ default:
+ goto undef;
+ }
+ DEST_EA(env, insn, opsize, tmp32, NULL);
+ tcg_temp_free_i32(tmp32);
+ return;
+ case 4: /* fmove to control register. */
+ switch ((ext >> 10) & 7) {
+ case 4: /* FPCR */
+ /* Not implemented. Ignore writes. */
+ break;
+ case 1: /* FPIAR */
+ case 2: /* FPSR */
+ default:
+ cpu_abort(NULL, "Unimplemented: fmove to control %d",
+ (ext >> 10) & 7);
+ }
+ break;
+ case 5: /* fmove from control register. */
+ switch ((ext >> 10) & 7) {
+ case 4: /* FPCR */
+ /* Not implemented. Always return zero. */
+ tmp32 = tcg_const_i32(0);
+ break;
+ case 1: /* FPIAR */
+ case 2: /* FPSR */
+ default:
+ cpu_abort(NULL, "Unimplemented: fmove from control %d",
+ (ext >> 10) & 7);
+ goto undef;
+ }
+ DEST_EA(env, insn, OS_LONG, tmp32, NULL);
+ break;
+ case 6: /* fmovem */
+ case 7:
+ {
+ TCGv addr;
+ uint16_t mask;
+ int i;
+ if ((ext & 0x1f00) != 0x1000 || (ext & 0xff) == 0)
+ goto undef;
+ tmp32 = gen_lea(env, s, insn, OS_LONG);
+ if (IS_NULL_QREG(tmp32)) {
+ gen_addr_fault(s);
+ return;
+ }
+ addr = tcg_temp_new_i32();
+ tcg_gen_mov_i32(addr, tmp32);
+ mask = 0x80;
+ for (i = 0; i < 8; i++) {
+ if (ext & mask) {
+ dest = FREG(i, 0);
+ if (ext & (1 << 13)) {
+ /* store */
+ tcg_gen_qemu_stf64(dest, addr, IS_USER(s));
+ } else {
+ /* load */
+ tcg_gen_qemu_ldf64(dest, addr, IS_USER(s));
+ }
+ if (ext & (mask - 1))
+ tcg_gen_addi_i32(addr, addr, 8);
+ }
+ mask >>= 1;
+ }
+ tcg_temp_free_i32(addr);
+ }
+ return;
+ }
+ if (ext & (1 << 14)) {
+ /* Source effective address. */
+ switch ((ext >> 10) & 7) {
+ case 0: opsize = OS_LONG; break;
+ case 1: opsize = OS_SINGLE; break;
+ case 4: opsize = OS_WORD; break;
+ case 5: opsize = OS_DOUBLE; break;
+ case 6: opsize = OS_BYTE; break;
+ default:
+ goto undef;
+ }
+ if (opsize == OS_DOUBLE) {
+ tmp32 = tcg_temp_new_i32();
+ tcg_gen_mov_i32(tmp32, AREG(insn, 0));
+ switch ((insn >> 3) & 7) {
+ case 2:
+ case 3:
+ break;
+ case 4:
+ tcg_gen_addi_i32(tmp32, tmp32, -8);
+ break;
+ case 5:
+ offset = cpu_ldsw_code(env, s->pc);
+ s->pc += 2;
+ tcg_gen_addi_i32(tmp32, tmp32, offset);
+ break;
+ case 7:
+ offset = cpu_ldsw_code(env, s->pc);
+ offset += s->pc - 2;
+ s->pc += 2;
+ tcg_gen_addi_i32(tmp32, tmp32, offset);
+ break;
+ default:
+ goto undef;
+ }
+ src = gen_load64(s, tmp32);
+ switch ((insn >> 3) & 7) {
+ case 3:
+ tcg_gen_addi_i32(tmp32, tmp32, 8);
+ tcg_gen_mov_i32(AREG(insn, 0), tmp32);
+ break;
+ case 4:
+ tcg_gen_mov_i32(AREG(insn, 0), tmp32);
+ break;
+ }
+ tcg_temp_free_i32(tmp32);
+ } else {
+ SRC_EA(env, tmp32, opsize, 1, NULL);
+ src = tcg_temp_new_i64();
+ switch (opsize) {
+ case OS_LONG:
+ case OS_WORD:
+ case OS_BYTE:
+ gen_helper_i32_to_f64(src, cpu_env, tmp32);
+ break;
+ case OS_SINGLE:
+ gen_helper_f32_to_f64(src, cpu_env, tmp32);
+ break;
+ }
+ }
+ } else {
+ /* Source register. */
+ src = FREG(ext, 10);
+ }
+ dest = FREG(ext, 7);
+ res = tcg_temp_new_i64();
+ if (opmode != 0x3a)
+ tcg_gen_mov_f64(res, dest);
+ round = 1;
+ set_dest = 1;
+ switch (opmode) {
+ case 0: case 0x40: case 0x44: /* fmove */
+ tcg_gen_mov_f64(res, src);
+ break;
+ case 1: /* fint */
+ gen_helper_iround_f64(res, cpu_env, src);
+ round = 0;
+ break;
+ case 3: /* fintrz */
+ gen_helper_itrunc_f64(res, cpu_env, src);
+ round = 0;
+ break;
+ case 4: case 0x41: case 0x45: /* fsqrt */
+ gen_helper_sqrt_f64(res, cpu_env, src);
+ break;
+ case 0x18: case 0x58: case 0x5c: /* fabs */
+ gen_helper_abs_f64(res, src);
+ break;
+ case 0x1a: case 0x5a: case 0x5e: /* fneg */
+ gen_helper_chs_f64(res, src);
+ break;
+ case 0x20: case 0x60: case 0x64: /* fdiv */
+ gen_helper_div_f64(res, cpu_env, res, src);
+ break;
+ case 0x22: case 0x62: case 0x66: /* fadd */
+ gen_helper_add_f64(res, cpu_env, res, src);
+ break;
+ case 0x23: case 0x63: case 0x67: /* fmul */
+ gen_helper_mul_f64(res, cpu_env, res, src);
+ break;
+ case 0x28: case 0x68: case 0x6c: /* fsub */
+ gen_helper_sub_f64(res, cpu_env, res, src);
+ break;
+ case 0x38: /* fcmp */
+ gen_helper_sub_cmp_f64(res, cpu_env, res, src);
+ set_dest = 0;
+ round = 0;
+ break;
+ case 0x3a: /* ftst */
+ tcg_gen_mov_f64(res, src);
+ set_dest = 0;
+ round = 0;
+ break;
+ default:
+ goto undef;
+ }
+ if (ext & (1 << 14)) {
+ tcg_temp_free_i64(src);
+ }
+ if (round) {
+ if (opmode & 0x40) {
+ if ((opmode & 0x4) != 0)
+ round = 0;
+ } else if ((s->fpcr & M68K_FPCR_PREC) == 0) {
+ round = 0;
+ }
+ }
+ if (round) {
+ TCGv tmp = tcg_temp_new_i32();
+ gen_helper_f64_to_f32(tmp, cpu_env, res);
+ gen_helper_f32_to_f64(res, cpu_env, tmp);
+ tcg_temp_free_i32(tmp);
+ }
+ tcg_gen_mov_f64(QREG_FP_RESULT, res);
+ if (set_dest) {
+ tcg_gen_mov_f64(dest, res);
+ }
+ tcg_temp_free_i64(res);
+ return;
+undef:
+ /* FIXME: Is this right for offset addressing modes? */
+ s->pc -= 2;
+ disas_undef_fpu(env, s, insn);
+}
+
+DISAS_INSN(fbcc)
+{
+ uint32_t offset;
+ uint32_t addr;
+ TCGv flag;
+ TCGLabel *l1;
+
+ addr = s->pc;
+ offset = cpu_ldsw_code(env, s->pc);
+ s->pc += 2;
+ if (insn & (1 << 6)) {
+ offset = (offset << 16) | read_im16(env, s);
+ }
+
+ l1 = gen_new_label();
+ /* TODO: Raise BSUN exception. */
+ flag = tcg_temp_new();
+ gen_helper_compare_f64(flag, cpu_env, QREG_FP_RESULT);
+ /* Jump to l1 if condition is true. */
+ switch (insn & 0xf) {
+ case 0: /* f */
+ break;
+ case 1: /* eq (=0) */
+ tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(0), l1);
+ break;
+ case 2: /* ogt (=1) */
+ tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(1), l1);
+ break;
+ case 3: /* oge (=0 or =1) */
+ tcg_gen_brcond_i32(TCG_COND_LEU, flag, tcg_const_i32(1), l1);
+ break;
+ case 4: /* olt (=-1) */
+ tcg_gen_brcond_i32(TCG_COND_LT, flag, tcg_const_i32(0), l1);
+ break;
+ case 5: /* ole (=-1 or =0) */
+ tcg_gen_brcond_i32(TCG_COND_LE, flag, tcg_const_i32(0), l1);
+ break;
+ case 6: /* ogl (=-1 or =1) */
+ tcg_gen_andi_i32(flag, flag, 1);
+ tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(0), l1);
+ break;
+ case 7: /* or (=2) */
+ tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(2), l1);
+ break;
+ case 8: /* un (<2) */
+ tcg_gen_brcond_i32(TCG_COND_LT, flag, tcg_const_i32(2), l1);
+ break;
+ case 9: /* ueq (=0 or =2) */
+ tcg_gen_andi_i32(flag, flag, 1);
+ tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(0), l1);
+ break;
+ case 10: /* ugt (>0) */
+ tcg_gen_brcond_i32(TCG_COND_GT, flag, tcg_const_i32(0), l1);
+ break;
+ case 11: /* uge (>=0) */
+ tcg_gen_brcond_i32(TCG_COND_GE, flag, tcg_const_i32(0), l1);
+ break;
+ case 12: /* ult (=-1 or =2) */
+ tcg_gen_brcond_i32(TCG_COND_GEU, flag, tcg_const_i32(2), l1);
+ break;
+ case 13: /* ule (!=1) */
+ tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(1), l1);
+ break;
+ case 14: /* ne (!=0) */
+ tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(0), l1);
+ break;
+ case 15: /* t */
+ tcg_gen_br(l1);
+ break;
+ }
+ gen_jmp_tb(s, 0, s->pc);
+ gen_set_label(l1);
+ gen_jmp_tb(s, 1, addr + offset);
+}
+
+DISAS_INSN(frestore)
+{
+ M68kCPU *cpu = m68k_env_get_cpu(env);
+
+ /* TODO: Implement frestore. */
+ cpu_abort(CPU(cpu), "FRESTORE not implemented");
+}
+
+DISAS_INSN(fsave)
+{
+ M68kCPU *cpu = m68k_env_get_cpu(env);
+
+ /* TODO: Implement fsave. */
+ cpu_abort(CPU(cpu), "FSAVE not implemented");
+}
+
+static inline TCGv gen_mac_extract_word(DisasContext *s, TCGv val, int upper)
+{
+ TCGv tmp = tcg_temp_new();
+ if (s->env->macsr & MACSR_FI) {
+ if (upper)
+ tcg_gen_andi_i32(tmp, val, 0xffff0000);
+ else
+ tcg_gen_shli_i32(tmp, val, 16);
+ } else if (s->env->macsr & MACSR_SU) {
+ if (upper)
+ tcg_gen_sari_i32(tmp, val, 16);
+ else
+ tcg_gen_ext16s_i32(tmp, val);
+ } else {
+ if (upper)
+ tcg_gen_shri_i32(tmp, val, 16);
+ else
+ tcg_gen_ext16u_i32(tmp, val);
+ }
+ return tmp;
+}
+
+static void gen_mac_clear_flags(void)
+{
+ tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR,
+ ~(MACSR_V | MACSR_Z | MACSR_N | MACSR_EV));
+}
+
+DISAS_INSN(mac)
+{
+ TCGv rx;
+ TCGv ry;
+ uint16_t ext;
+ int acc;
+ TCGv tmp;
+ TCGv addr;
+ TCGv loadval;
+ int dual;
+ TCGv saved_flags;
+
+ if (!s->done_mac) {
+ s->mactmp = tcg_temp_new_i64();
+ s->done_mac = 1;
+ }
+
+ ext = read_im16(env, s);
+
+ acc = ((insn >> 7) & 1) | ((ext >> 3) & 2);
+ dual = ((insn & 0x30) != 0 && (ext & 3) != 0);
+ if (dual && !m68k_feature(s->env, M68K_FEATURE_CF_EMAC_B)) {
+ disas_undef(env, s, insn);
+ return;
+ }
+ if (insn & 0x30) {
+ /* MAC with load. */
+ tmp = gen_lea(env, s, insn, OS_LONG);
+ addr = tcg_temp_new();
+ tcg_gen_and_i32(addr, tmp, QREG_MAC_MASK);
+ /* Load the value now to ensure correct exception behavior.
+ Perform writeback after reading the MAC inputs. */
+ loadval = gen_load(s, OS_LONG, addr, 0);
+
+ acc ^= 1;
+ rx = (ext & 0x8000) ? AREG(ext, 12) : DREG(insn, 12);
+ ry = (ext & 8) ? AREG(ext, 0) : DREG(ext, 0);
+ } else {
+ loadval = addr = NULL_QREG;
+ rx = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9);
+ ry = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
+ }
+
+ gen_mac_clear_flags();
+#if 0
+ l1 = -1;
+ /* Disabled because conditional branches clobber temporary vars. */
+ if ((s->env->macsr & MACSR_OMC) != 0 && !dual) {
+ /* Skip the multiply if we know we will ignore it. */
+ l1 = gen_new_label();
+ tmp = tcg_temp_new();
+ tcg_gen_andi_i32(tmp, QREG_MACSR, 1 << (acc + 8));
+ gen_op_jmp_nz32(tmp, l1);
+ }
+#endif
+
+ if ((ext & 0x0800) == 0) {
+ /* Word. */
+ rx = gen_mac_extract_word(s, rx, (ext & 0x80) != 0);
+ ry = gen_mac_extract_word(s, ry, (ext & 0x40) != 0);
+ }
+ if (s->env->macsr & MACSR_FI) {
+ gen_helper_macmulf(s->mactmp, cpu_env, rx, ry);
+ } else {
+ if (s->env->macsr & MACSR_SU)
+ gen_helper_macmuls(s->mactmp, cpu_env, rx, ry);
+ else
+ gen_helper_macmulu(s->mactmp, cpu_env, rx, ry);
+ switch ((ext >> 9) & 3) {
+ case 1:
+ tcg_gen_shli_i64(s->mactmp, s->mactmp, 1);
+ break;
+ case 3:
+ tcg_gen_shri_i64(s->mactmp, s->mactmp, 1);
+ break;
+ }
+ }
+
+ if (dual) {
+ /* Save the overflow flag from the multiply. */
+ saved_flags = tcg_temp_new();
+ tcg_gen_mov_i32(saved_flags, QREG_MACSR);
+ } else {
+ saved_flags = NULL_QREG;
+ }
+
+#if 0
+ /* Disabled because conditional branches clobber temporary vars. */
+ if ((s->env->macsr & MACSR_OMC) != 0 && dual) {
+ /* Skip the accumulate if the value is already saturated. */
+ l1 = gen_new_label();
+ tmp = tcg_temp_new();
+ gen_op_and32(tmp, QREG_MACSR, tcg_const_i32(MACSR_PAV0 << acc));
+ gen_op_jmp_nz32(tmp, l1);
+ }
+#endif
+
+ if (insn & 0x100)
+ tcg_gen_sub_i64(MACREG(acc), MACREG(acc), s->mactmp);
+ else
+ tcg_gen_add_i64(MACREG(acc), MACREG(acc), s->mactmp);
+
+ if (s->env->macsr & MACSR_FI)
+ gen_helper_macsatf(cpu_env, tcg_const_i32(acc));
+ else if (s->env->macsr & MACSR_SU)
+ gen_helper_macsats(cpu_env, tcg_const_i32(acc));
+ else
+ gen_helper_macsatu(cpu_env, tcg_const_i32(acc));
+
+#if 0
+ /* Disabled because conditional branches clobber temporary vars. */
+ if (l1 != -1)
+ gen_set_label(l1);
+#endif
+
+ if (dual) {
+ /* Dual accumulate variant. */
+ acc = (ext >> 2) & 3;
+ /* Restore the overflow flag from the multiplier. */
+ tcg_gen_mov_i32(QREG_MACSR, saved_flags);
+#if 0
+ /* Disabled because conditional branches clobber temporary vars. */
+ if ((s->env->macsr & MACSR_OMC) != 0) {
+ /* Skip the accumulate if the value is already saturated. */
+ l1 = gen_new_label();
+ tmp = tcg_temp_new();
+ gen_op_and32(tmp, QREG_MACSR, tcg_const_i32(MACSR_PAV0 << acc));
+ gen_op_jmp_nz32(tmp, l1);
+ }
+#endif
+ if (ext & 2)
+ tcg_gen_sub_i64(MACREG(acc), MACREG(acc), s->mactmp);
+ else
+ tcg_gen_add_i64(MACREG(acc), MACREG(acc), s->mactmp);
+ if (s->env->macsr & MACSR_FI)
+ gen_helper_macsatf(cpu_env, tcg_const_i32(acc));
+ else if (s->env->macsr & MACSR_SU)
+ gen_helper_macsats(cpu_env, tcg_const_i32(acc));
+ else
+ gen_helper_macsatu(cpu_env, tcg_const_i32(acc));
+#if 0
+ /* Disabled because conditional branches clobber temporary vars. */
+ if (l1 != -1)
+ gen_set_label(l1);
+#endif
+ }
+ gen_helper_mac_set_flags(cpu_env, tcg_const_i32(acc));
+
+ if (insn & 0x30) {
+ TCGv rw;
+ rw = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9);
+ tcg_gen_mov_i32(rw, loadval);
+ /* FIXME: Should address writeback happen with the masked or
+ unmasked value? */
+ switch ((insn >> 3) & 7) {
+ case 3: /* Post-increment. */
+ tcg_gen_addi_i32(AREG(insn, 0), addr, 4);
+ break;
+ case 4: /* Pre-decrement. */
+ tcg_gen_mov_i32(AREG(insn, 0), addr);
+ }
+ }
+}
+
+DISAS_INSN(from_mac)
+{
+ TCGv rx;
+ TCGv_i64 acc;
+ int accnum;
+
+ rx = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
+ accnum = (insn >> 9) & 3;
+ acc = MACREG(accnum);
+ if (s->env->macsr & MACSR_FI) {
+ gen_helper_get_macf(rx, cpu_env, acc);
+ } else if ((s->env->macsr & MACSR_OMC) == 0) {
+ tcg_gen_extrl_i64_i32(rx, acc);
+ } else if (s->env->macsr & MACSR_SU) {
+ gen_helper_get_macs(rx, acc);
+ } else {
+ gen_helper_get_macu(rx, acc);
+ }
+ if (insn & 0x40) {
+ tcg_gen_movi_i64(acc, 0);
+ tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR, ~(MACSR_PAV0 << accnum));
+ }
+}
+
+DISAS_INSN(move_mac)
+{
+ /* FIXME: This can be done without a helper. */
+ int src;
+ TCGv dest;
+ src = insn & 3;
+ dest = tcg_const_i32((insn >> 9) & 3);
+ gen_helper_mac_move(cpu_env, dest, tcg_const_i32(src));
+ gen_mac_clear_flags();
+ gen_helper_mac_set_flags(cpu_env, dest);
+}
+
+DISAS_INSN(from_macsr)
+{
+ TCGv reg;
+
+ reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
+ tcg_gen_mov_i32(reg, QREG_MACSR);
+}
+
+DISAS_INSN(from_mask)
+{
+ TCGv reg;
+ reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
+ tcg_gen_mov_i32(reg, QREG_MAC_MASK);
+}
+
+DISAS_INSN(from_mext)
+{
+ TCGv reg;
+ TCGv acc;
+ reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
+ acc = tcg_const_i32((insn & 0x400) ? 2 : 0);
+ if (s->env->macsr & MACSR_FI)
+ gen_helper_get_mac_extf(reg, cpu_env, acc);
+ else
+ gen_helper_get_mac_exti(reg, cpu_env, acc);
+}
+
+DISAS_INSN(macsr_to_ccr)
+{
+ TCGv tmp = tcg_temp_new();
+ tcg_gen_andi_i32(tmp, QREG_MACSR, 0xf);
+ gen_helper_set_sr(cpu_env, tmp);
+ tcg_temp_free(tmp);
+ set_cc_op(s, CC_OP_FLAGS);
+}
+
+DISAS_INSN(to_mac)
+{
+ TCGv_i64 acc;
+ TCGv val;
+ int accnum;
+ accnum = (insn >> 9) & 3;
+ acc = MACREG(accnum);
+ SRC_EA(env, val, OS_LONG, 0, NULL);
+ if (s->env->macsr & MACSR_FI) {
+ tcg_gen_ext_i32_i64(acc, val);
+ tcg_gen_shli_i64(acc, acc, 8);
+ } else if (s->env->macsr & MACSR_SU) {
+ tcg_gen_ext_i32_i64(acc, val);
+ } else {
+ tcg_gen_extu_i32_i64(acc, val);
+ }
+ tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR, ~(MACSR_PAV0 << accnum));
+ gen_mac_clear_flags();
+ gen_helper_mac_set_flags(cpu_env, tcg_const_i32(accnum));
+}
+
+DISAS_INSN(to_macsr)
+{
+ TCGv val;
+ SRC_EA(env, val, OS_LONG, 0, NULL);
+ gen_helper_set_macsr(cpu_env, val);
+ gen_lookup_tb(s);
+}
+
+DISAS_INSN(to_mask)
+{
+ TCGv val;
+ SRC_EA(env, val, OS_LONG, 0, NULL);
+ tcg_gen_ori_i32(QREG_MAC_MASK, val, 0xffff0000);
+}
+
+DISAS_INSN(to_mext)
+{
+ TCGv val;
+ TCGv acc;
+ SRC_EA(env, val, OS_LONG, 0, NULL);
+ acc = tcg_const_i32((insn & 0x400) ? 2 : 0);
+ if (s->env->macsr & MACSR_FI)
+ gen_helper_set_mac_extf(cpu_env, val, acc);
+ else if (s->env->macsr & MACSR_SU)
+ gen_helper_set_mac_exts(cpu_env, val, acc);
+ else
+ gen_helper_set_mac_extu(cpu_env, val, acc);
+}
+
+static disas_proc opcode_table[65536];
+
+static void
+register_opcode (disas_proc proc, uint16_t opcode, uint16_t mask)
+{
+ int i;
+ int from;
+ int to;
+
+ /* Sanity check. All set bits must be included in the mask. */
+ if (opcode & ~mask) {
+ fprintf(stderr,
+ "qemu internal error: bogus opcode definition %04x/%04x\n",
+ opcode, mask);
+ abort();
+ }
+ /* This could probably be cleverer. For now just optimize the case where
+ the top bits are known. */
+ /* Find the first zero bit in the mask. */
+ i = 0x8000;
+ while ((i & mask) != 0)
+ i >>= 1;
+ /* Iterate over all combinations of this and lower bits. */
+ if (i == 0)
+ i = 1;
+ else
+ i <<= 1;
+ from = opcode & ~(i - 1);
+ to = from + i;
+ for (i = from; i < to; i++) {
+ if ((i & mask) == opcode)
+ opcode_table[i] = proc;
+ }
+}
+
+/* Register m68k opcode handlers. Order is important.
+ Later insn override earlier ones. */
+void register_m68k_insns (CPUM68KState *env)
+{
+ /* Build the opcode table only once to avoid
+ multithreading issues. */
+ if (opcode_table[0] != NULL) {
+ return;
+ }
+
+ /* use BASE() for instruction available
+ * for CF_ISA_A and M68000.
+ */
+#define BASE(name, opcode, mask) \
+ register_opcode(disas_##name, 0x##opcode, 0x##mask)
+#define INSN(name, opcode, mask, feature) do { \
+ if (m68k_feature(env, M68K_FEATURE_##feature)) \
+ BASE(name, opcode, mask); \
+ } while(0)
+ BASE(undef, 0000, 0000);
+ INSN(arith_im, 0080, fff8, CF_ISA_A);
+ INSN(arith_im, 0000, ff00, M68000);
+ INSN(undef, 00c0, ffc0, M68000);
+ INSN(bitrev, 00c0, fff8, CF_ISA_APLUSC);
+ BASE(bitop_reg, 0100, f1c0);
+ BASE(bitop_reg, 0140, f1c0);
+ BASE(bitop_reg, 0180, f1c0);
+ BASE(bitop_reg, 01c0, f1c0);
+ INSN(arith_im, 0280, fff8, CF_ISA_A);
+ INSN(arith_im, 0200, ff00, M68000);
+ INSN(undef, 02c0, ffc0, M68000);
+ INSN(byterev, 02c0, fff8, CF_ISA_APLUSC);
+ INSN(arith_im, 0480, fff8, CF_ISA_A);
+ INSN(arith_im, 0400, ff00, M68000);
+ INSN(undef, 04c0, ffc0, M68000);
+ INSN(arith_im, 0600, ff00, M68000);
+ INSN(undef, 06c0, ffc0, M68000);
+ INSN(ff1, 04c0, fff8, CF_ISA_APLUSC);
+ INSN(arith_im, 0680, fff8, CF_ISA_A);
+ INSN(arith_im, 0c00, ff38, CF_ISA_A);
+ INSN(arith_im, 0c00, ff00, M68000);
+ BASE(bitop_im, 0800, ffc0);
+ BASE(bitop_im, 0840, ffc0);
+ BASE(bitop_im, 0880, ffc0);
+ BASE(bitop_im, 08c0, ffc0);
+ INSN(arith_im, 0a80, fff8, CF_ISA_A);
+ INSN(arith_im, 0a00, ff00, M68000);
+ BASE(move, 1000, f000);
+ BASE(move, 2000, f000);
+ BASE(move, 3000, f000);
+ INSN(strldsr, 40e7, ffff, CF_ISA_APLUSC);
+ INSN(negx, 4080, fff8, CF_ISA_A);
+ INSN(negx, 4000, ff00, M68000);
+ INSN(undef, 40c0, ffc0, M68000);
+ INSN(move_from_sr, 40c0, fff8, CF_ISA_A);
+ INSN(move_from_sr, 40c0, ffc0, M68000);
+ BASE(lea, 41c0, f1c0);
+ BASE(clr, 4200, ff00);
+ BASE(undef, 42c0, ffc0);
+ INSN(move_from_ccr, 42c0, fff8, CF_ISA_A);
+ INSN(move_from_ccr, 42c0, ffc0, M68000);
+ INSN(neg, 4480, fff8, CF_ISA_A);
+ INSN(neg, 4400, ff00, M68000);
+ INSN(undef, 44c0, ffc0, M68000);
+ BASE(move_to_ccr, 44c0, ffc0);
+ INSN(not, 4680, fff8, CF_ISA_A);
+ INSN(not, 4600, ff00, M68000);
+ INSN(undef, 46c0, ffc0, M68000);
+ INSN(move_to_sr, 46c0, ffc0, CF_ISA_A);
+ INSN(linkl, 4808, fff8, M68000);
+ BASE(pea, 4840, ffc0);
+ BASE(swap, 4840, fff8);
+ INSN(bkpt, 4848, fff8, BKPT);
+ BASE(movem, 48c0, fbc0);
+ BASE(ext, 4880, fff8);
+ BASE(ext, 48c0, fff8);
+ BASE(ext, 49c0, fff8);
+ BASE(tst, 4a00, ff00);
+ INSN(tas, 4ac0, ffc0, CF_ISA_B);
+ INSN(tas, 4ac0, ffc0, M68000);
+ INSN(halt, 4ac8, ffff, CF_ISA_A);
+ INSN(pulse, 4acc, ffff, CF_ISA_A);
+ BASE(illegal, 4afc, ffff);
+ INSN(mull, 4c00, ffc0, CF_ISA_A);
+ INSN(mull, 4c00, ffc0, LONG_MULDIV);
+ INSN(divl, 4c40, ffc0, CF_ISA_A);
+ INSN(divl, 4c40, ffc0, LONG_MULDIV);
+ INSN(sats, 4c80, fff8, CF_ISA_B);
+ BASE(trap, 4e40, fff0);
+ BASE(link, 4e50, fff8);
+ BASE(unlk, 4e58, fff8);
+ INSN(move_to_usp, 4e60, fff8, USP);
+ INSN(move_from_usp, 4e68, fff8, USP);
+ BASE(nop, 4e71, ffff);
+ BASE(stop, 4e72, ffff);
+ BASE(rte, 4e73, ffff);
+ BASE(rts, 4e75, ffff);
+ INSN(movec, 4e7b, ffff, CF_ISA_A);
+ BASE(jump, 4e80, ffc0);
+ BASE(jump, 4ec0, ffc0);
+ INSN(addsubq, 5000, f080, M68000);
+ BASE(addsubq, 5080, f0c0);
+ INSN(scc, 50c0, f0f8, CF_ISA_A); /* Scc.B Dx */
+ INSN(scc, 50c0, f0c0, M68000); /* Scc.B <EA> */
+ INSN(dbcc, 50c8, f0f8, M68000);
+ INSN(tpf, 51f8, fff8, CF_ISA_A);
+
+ /* Branch instructions. */
+ BASE(branch, 6000, f000);
+ /* Disable long branch instructions, then add back the ones we want. */
+ BASE(undef, 60ff, f0ff); /* All long branches. */
+ INSN(branch, 60ff, f0ff, CF_ISA_B);
+ INSN(undef, 60ff, ffff, CF_ISA_B); /* bra.l */
+ INSN(branch, 60ff, ffff, BRAL);
+ INSN(branch, 60ff, f0ff, BCCL);
+
+ BASE(moveq, 7000, f100);
+ INSN(mvzs, 7100, f100, CF_ISA_B);
+ BASE(or, 8000, f000);
+ BASE(divw, 80c0, f0c0);
+ BASE(addsub, 9000, f000);
+ INSN(undef, 90c0, f0c0, CF_ISA_A);
+ INSN(subx_reg, 9180, f1f8, CF_ISA_A);
+ INSN(subx_reg, 9100, f138, M68000);
+ INSN(subx_mem, 9108, f138, M68000);
+ INSN(suba, 91c0, f1c0, CF_ISA_A);
+ INSN(suba, 90c0, f0c0, M68000);
+
+ BASE(undef_mac, a000, f000);
+ INSN(mac, a000, f100, CF_EMAC);
+ INSN(from_mac, a180, f9b0, CF_EMAC);
+ INSN(move_mac, a110, f9fc, CF_EMAC);
+ INSN(from_macsr,a980, f9f0, CF_EMAC);
+ INSN(from_mask, ad80, fff0, CF_EMAC);
+ INSN(from_mext, ab80, fbf0, CF_EMAC);
+ INSN(macsr_to_ccr, a9c0, ffff, CF_EMAC);
+ INSN(to_mac, a100, f9c0, CF_EMAC);
+ INSN(to_macsr, a900, ffc0, CF_EMAC);
+ INSN(to_mext, ab00, fbc0, CF_EMAC);
+ INSN(to_mask, ad00, ffc0, CF_EMAC);
+
+ INSN(mov3q, a140, f1c0, CF_ISA_B);
+ INSN(cmp, b000, f1c0, CF_ISA_B); /* cmp.b */
+ INSN(cmp, b040, f1c0, CF_ISA_B); /* cmp.w */
+ INSN(cmpa, b0c0, f1c0, CF_ISA_B); /* cmpa.w */
+ INSN(cmp, b080, f1c0, CF_ISA_A);
+ INSN(cmpa, b1c0, f1c0, CF_ISA_A);
+ INSN(cmp, b000, f100, M68000);
+ INSN(eor, b100, f100, M68000);
+ INSN(cmpa, b0c0, f0c0, M68000);
+ INSN(eor, b180, f1c0, CF_ISA_A);
+ BASE(and, c000, f000);
+ INSN(exg_dd, c140, f1f8, M68000);
+ INSN(exg_aa, c148, f1f8, M68000);
+ INSN(exg_da, c188, f1f8, M68000);
+ BASE(mulw, c0c0, f0c0);
+ BASE(addsub, d000, f000);
+ INSN(undef, d0c0, f0c0, CF_ISA_A);
+ INSN(addx_reg, d180, f1f8, CF_ISA_A);
+ INSN(addx_reg, d100, f138, M68000);
+ INSN(addx_mem, d108, f138, M68000);
+ INSN(adda, d1c0, f1c0, CF_ISA_A);
+ INSN(adda, d0c0, f0c0, M68000);
+ INSN(shift_im, e080, f0f0, CF_ISA_A);
+ INSN(shift_reg, e0a0, f0f0, CF_ISA_A);
+ INSN(undef_fpu, f000, f000, CF_ISA_A);
+ INSN(fpu, f200, ffc0, CF_FPU);
+ INSN(fbcc, f280, ffc0, CF_FPU);
+ INSN(frestore, f340, ffc0, CF_FPU);
+ INSN(fsave, f340, ffc0, CF_FPU);
+ INSN(intouch, f340, ffc0, CF_ISA_A);
+ INSN(cpushl, f428, ff38, CF_ISA_A);
+ INSN(wddata, fb00, ff00, CF_ISA_A);
+ INSN(wdebug, fbc0, ffc0, CF_ISA_A);
+#undef INSN
+}
+
+/* ??? Some of this implementation is not exception safe. We should always
+ write back the result to memory before setting the condition codes. */
+static void disas_m68k_insn(CPUM68KState * env, DisasContext *s)
+{
+ uint16_t insn;
+
+ insn = read_im16(env, s);
+
+ opcode_table[insn](env, s, insn);
+}
+
+/* generate intermediate code for basic block 'tb'. */
+void gen_intermediate_code(CPUM68KState *env, TranslationBlock *tb)
+{
+ M68kCPU *cpu = m68k_env_get_cpu(env);
+ CPUState *cs = CPU(cpu);
+ DisasContext dc1, *dc = &dc1;
+ target_ulong pc_start;
+ int pc_offset;
+ int num_insns;
+ int max_insns;
+
+ /* generate intermediate code */
+ pc_start = tb->pc;
+
+ dc->tb = tb;
+
+ dc->env = env;
+ dc->is_jmp = DISAS_NEXT;
+ dc->pc = pc_start;
+ dc->cc_op = CC_OP_DYNAMIC;
+ dc->cc_op_synced = 1;
+ dc->singlestep_enabled = cs->singlestep_enabled;
+ dc->fpcr = env->fpcr;
+ dc->user = (env->sr & SR_S) == 0;
+ dc->done_mac = 0;
+ num_insns = 0;
+ max_insns = tb->cflags & CF_COUNT_MASK;
+ if (max_insns == 0) {
+ max_insns = CF_COUNT_MASK;
+ }
+ if (max_insns > TCG_MAX_INSNS) {
+ max_insns = TCG_MAX_INSNS;
+ }
+
+ gen_tb_start(tb);
+ do {
+ pc_offset = dc->pc - pc_start;
+ gen_throws_exception = NULL;
+ tcg_gen_insn_start(dc->pc, dc->cc_op);
+ num_insns++;
+
+ if (unlikely(cpu_breakpoint_test(cs, dc->pc, BP_ANY))) {
+ gen_exception(dc, dc->pc, EXCP_DEBUG);
+ dc->is_jmp = DISAS_JUMP;
+ /* The address covered by the breakpoint must be included in
+ [tb->pc, tb->pc + tb->size) in order to for it to be
+ properly cleared -- thus we increment the PC here so that
+ the logic setting tb->size below does the right thing. */
+ dc->pc += 2;
+ break;
+ }
+
+ if (num_insns == max_insns && (tb->cflags & CF_LAST_IO)) {
+ gen_io_start();
+ }
+
+ dc->insn_pc = dc->pc;
+ disas_m68k_insn(env, dc);
+ } while (!dc->is_jmp && !tcg_op_buf_full() &&
+ !cs->singlestep_enabled &&
+ !singlestep &&
+ (pc_offset) < (TARGET_PAGE_SIZE - 32) &&
+ num_insns < max_insns);
+
+ if (tb->cflags & CF_LAST_IO)
+ gen_io_end();
+ if (unlikely(cs->singlestep_enabled)) {
+ /* Make sure the pc is updated, and raise a debug exception. */
+ if (!dc->is_jmp) {
+ update_cc_op(dc);
+ tcg_gen_movi_i32(QREG_PC, dc->pc);
+ }
+ gen_helper_raise_exception(cpu_env, tcg_const_i32(EXCP_DEBUG));
+ } else {
+ switch(dc->is_jmp) {
+ case DISAS_NEXT:
+ update_cc_op(dc);
+ gen_jmp_tb(dc, 0, dc->pc);
+ break;
+ default:
+ case DISAS_JUMP:
+ case DISAS_UPDATE:
+ update_cc_op(dc);
+ /* indicate that the hash table must be used to find the next TB */
+ tcg_gen_exit_tb(0);
+ break;
+ case DISAS_TB_JUMP:
+ /* nothing more to generate */
+ break;
+ }
+ }
+ gen_tb_end(tb, num_insns);
+
+#ifdef DEBUG_DISAS
+ if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)
+ && qemu_log_in_addr_range(pc_start)) {
+ qemu_log_lock();
+ qemu_log("----------------\n");
+ qemu_log("IN: %s\n", lookup_symbol(pc_start));
+ log_target_disas(cs, pc_start, dc->pc - pc_start, 0);
+ qemu_log("\n");
+ qemu_log_unlock();
+ }
+#endif
+ tb->size = dc->pc - pc_start;
+ tb->icount = num_insns;
+}
+
+void m68k_cpu_dump_state(CPUState *cs, FILE *f, fprintf_function cpu_fprintf,
+ int flags)
+{
+ M68kCPU *cpu = M68K_CPU(cs);
+ CPUM68KState *env = &cpu->env;
+ int i;
+ uint16_t sr;
+ CPU_DoubleU u;
+ for (i = 0; i < 8; i++)
+ {
+ u.d = env->fregs[i];
+ cpu_fprintf(f, "D%d = %08x A%d = %08x F%d = %08x%08x (%12g)\n",
+ i, env->dregs[i], i, env->aregs[i],
+ i, u.l.upper, u.l.lower, *(double *)&u.d);
+ }
+ cpu_fprintf (f, "PC = %08x ", env->pc);
+ sr = env->sr | cpu_m68k_get_ccr(env);
+ cpu_fprintf(f, "SR = %04x %c%c%c%c%c ", sr, (sr & CCF_X) ? 'X' : '-',
+ (sr & CCF_N) ? 'N' : '-', (sr & CCF_Z) ? 'Z' : '-',
+ (sr & CCF_V) ? 'V' : '-', (sr & CCF_C) ? 'C' : '-');
+ cpu_fprintf (f, "FPRESULT = %12g\n", *(double *)&env->fp_result);
+}
+
+void restore_state_to_opc(CPUM68KState *env, TranslationBlock *tb,
+ target_ulong *data)
+{
+ int cc_op = data[1];
+ env->pc = data[0];
+ if (cc_op != CC_OP_DYNAMIC) {
+ env->cc_op = cc_op;
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-30 14:31:00 +0000