aboutsummaryrefslogtreecommitdiff
path: root/target-i386/cc_helper.c
diff options
context:
space:
mode:
Diffstat (limited to 'target-i386/cc_helper.c')
-rw-r--r--target-i386/cc_helper.c387
1 files changed, 387 insertions, 0 deletions
diff --git a/target-i386/cc_helper.c b/target-i386/cc_helper.c
new file mode 100644
index 0000000000..ff654bc5ed
--- /dev/null
+++ b/target-i386/cc_helper.c
@@ -0,0 +1,387 @@
+/*
+ * x86 condition code helpers
+ *
+ * Copyright (c) 2003 Fabrice Bellard
+ *
+ * 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 "cpu.h"
+#include "dyngen-exec.h"
+#include "helper.h"
+
+const uint8_t parity_table[256] = {
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
+ 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
+};
+
+#define SHIFT 0
+#include "cc_helper_template.h"
+#undef SHIFT
+
+#define SHIFT 1
+#include "cc_helper_template.h"
+#undef SHIFT
+
+#define SHIFT 2
+#include "cc_helper_template.h"
+#undef SHIFT
+
+#ifdef TARGET_X86_64
+
+#define SHIFT 3
+#include "cc_helper_template.h"
+#undef SHIFT
+
+#endif
+
+static int compute_all_eflags(void)
+{
+ return CC_SRC;
+}
+
+static int compute_c_eflags(void)
+{
+ return CC_SRC & CC_C;
+}
+
+uint32_t helper_cc_compute_all(int op)
+{
+ switch (op) {
+ default: /* should never happen */
+ return 0;
+
+ case CC_OP_EFLAGS:
+ return compute_all_eflags();
+
+ case CC_OP_MULB:
+ return compute_all_mulb();
+ case CC_OP_MULW:
+ return compute_all_mulw();
+ case CC_OP_MULL:
+ return compute_all_mull();
+
+ case CC_OP_ADDB:
+ return compute_all_addb();
+ case CC_OP_ADDW:
+ return compute_all_addw();
+ case CC_OP_ADDL:
+ return compute_all_addl();
+
+ case CC_OP_ADCB:
+ return compute_all_adcb();
+ case CC_OP_ADCW:
+ return compute_all_adcw();
+ case CC_OP_ADCL:
+ return compute_all_adcl();
+
+ case CC_OP_SUBB:
+ return compute_all_subb();
+ case CC_OP_SUBW:
+ return compute_all_subw();
+ case CC_OP_SUBL:
+ return compute_all_subl();
+
+ case CC_OP_SBBB:
+ return compute_all_sbbb();
+ case CC_OP_SBBW:
+ return compute_all_sbbw();
+ case CC_OP_SBBL:
+ return compute_all_sbbl();
+
+ case CC_OP_LOGICB:
+ return compute_all_logicb();
+ case CC_OP_LOGICW:
+ return compute_all_logicw();
+ case CC_OP_LOGICL:
+ return compute_all_logicl();
+
+ case CC_OP_INCB:
+ return compute_all_incb();
+ case CC_OP_INCW:
+ return compute_all_incw();
+ case CC_OP_INCL:
+ return compute_all_incl();
+
+ case CC_OP_DECB:
+ return compute_all_decb();
+ case CC_OP_DECW:
+ return compute_all_decw();
+ case CC_OP_DECL:
+ return compute_all_decl();
+
+ case CC_OP_SHLB:
+ return compute_all_shlb();
+ case CC_OP_SHLW:
+ return compute_all_shlw();
+ case CC_OP_SHLL:
+ return compute_all_shll();
+
+ case CC_OP_SARB:
+ return compute_all_sarb();
+ case CC_OP_SARW:
+ return compute_all_sarw();
+ case CC_OP_SARL:
+ return compute_all_sarl();
+
+#ifdef TARGET_X86_64
+ case CC_OP_MULQ:
+ return compute_all_mulq();
+
+ case CC_OP_ADDQ:
+ return compute_all_addq();
+
+ case CC_OP_ADCQ:
+ return compute_all_adcq();
+
+ case CC_OP_SUBQ:
+ return compute_all_subq();
+
+ case CC_OP_SBBQ:
+ return compute_all_sbbq();
+
+ case CC_OP_LOGICQ:
+ return compute_all_logicq();
+
+ case CC_OP_INCQ:
+ return compute_all_incq();
+
+ case CC_OP_DECQ:
+ return compute_all_decq();
+
+ case CC_OP_SHLQ:
+ return compute_all_shlq();
+
+ case CC_OP_SARQ:
+ return compute_all_sarq();
+#endif
+ }
+}
+
+uint32_t cpu_cc_compute_all(CPUX86State *env1, int op)
+{
+ CPUX86State *saved_env;
+ uint32_t ret;
+
+ saved_env = env;
+ env = env1;
+ ret = helper_cc_compute_all(op);
+ env = saved_env;
+ return ret;
+}
+
+uint32_t helper_cc_compute_c(int op)
+{
+ switch (op) {
+ default: /* should never happen */
+ return 0;
+
+ case CC_OP_EFLAGS:
+ return compute_c_eflags();
+
+ case CC_OP_MULB:
+ return compute_c_mull();
+ case CC_OP_MULW:
+ return compute_c_mull();
+ case CC_OP_MULL:
+ return compute_c_mull();
+
+ case CC_OP_ADDB:
+ return compute_c_addb();
+ case CC_OP_ADDW:
+ return compute_c_addw();
+ case CC_OP_ADDL:
+ return compute_c_addl();
+
+ case CC_OP_ADCB:
+ return compute_c_adcb();
+ case CC_OP_ADCW:
+ return compute_c_adcw();
+ case CC_OP_ADCL:
+ return compute_c_adcl();
+
+ case CC_OP_SUBB:
+ return compute_c_subb();
+ case CC_OP_SUBW:
+ return compute_c_subw();
+ case CC_OP_SUBL:
+ return compute_c_subl();
+
+ case CC_OP_SBBB:
+ return compute_c_sbbb();
+ case CC_OP_SBBW:
+ return compute_c_sbbw();
+ case CC_OP_SBBL:
+ return compute_c_sbbl();
+
+ case CC_OP_LOGICB:
+ return compute_c_logicb();
+ case CC_OP_LOGICW:
+ return compute_c_logicw();
+ case CC_OP_LOGICL:
+ return compute_c_logicl();
+
+ case CC_OP_INCB:
+ return compute_c_incl();
+ case CC_OP_INCW:
+ return compute_c_incl();
+ case CC_OP_INCL:
+ return compute_c_incl();
+
+ case CC_OP_DECB:
+ return compute_c_incl();
+ case CC_OP_DECW:
+ return compute_c_incl();
+ case CC_OP_DECL:
+ return compute_c_incl();
+
+ case CC_OP_SHLB:
+ return compute_c_shlb();
+ case CC_OP_SHLW:
+ return compute_c_shlw();
+ case CC_OP_SHLL:
+ return compute_c_shll();
+
+ case CC_OP_SARB:
+ return compute_c_sarl();
+ case CC_OP_SARW:
+ return compute_c_sarl();
+ case CC_OP_SARL:
+ return compute_c_sarl();
+
+#ifdef TARGET_X86_64
+ case CC_OP_MULQ:
+ return compute_c_mull();
+
+ case CC_OP_ADDQ:
+ return compute_c_addq();
+
+ case CC_OP_ADCQ:
+ return compute_c_adcq();
+
+ case CC_OP_SUBQ:
+ return compute_c_subq();
+
+ case CC_OP_SBBQ:
+ return compute_c_sbbq();
+
+ case CC_OP_LOGICQ:
+ return compute_c_logicq();
+
+ case CC_OP_INCQ:
+ return compute_c_incl();
+
+ case CC_OP_DECQ:
+ return compute_c_incl();
+
+ case CC_OP_SHLQ:
+ return compute_c_shlq();
+
+ case CC_OP_SARQ:
+ return compute_c_sarl();
+#endif
+ }
+}
+
+void helper_write_eflags(target_ulong t0, uint32_t update_mask)
+{
+ cpu_load_eflags(env, t0, update_mask);
+}
+
+target_ulong helper_read_eflags(void)
+{
+ uint32_t eflags;
+
+ eflags = helper_cc_compute_all(CC_OP);
+ eflags |= (DF & DF_MASK);
+ eflags |= env->eflags & ~(VM_MASK | RF_MASK);
+ return eflags;
+}
+
+void helper_clts(void)
+{
+ env->cr[0] &= ~CR0_TS_MASK;
+ env->hflags &= ~HF_TS_MASK;
+}
+
+void helper_reset_rf(void)
+{
+ env->eflags &= ~RF_MASK;
+}
+
+void helper_cli(void)
+{
+ env->eflags &= ~IF_MASK;
+}
+
+void helper_sti(void)
+{
+ env->eflags |= IF_MASK;
+}
+
+#if 0
+/* vm86plus instructions */
+void helper_cli_vm(void)
+{
+ env->eflags &= ~VIF_MASK;
+}
+
+void helper_sti_vm(void)
+{
+ env->eflags |= VIF_MASK;
+ if (env->eflags & VIP_MASK) {
+ raise_exception(env, EXCP0D_GPF);
+ }
+}
+#endif
+
+void helper_set_inhibit_irq(void)
+{
+ env->hflags |= HF_INHIBIT_IRQ_MASK;
+}
+
+void helper_reset_inhibit_irq(void)
+{
+ env->hflags &= ~HF_INHIBIT_IRQ_MASK;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-23 10:57:45 +0000