/* * AArch64 translation * * Copyright (c) 2013 Alexander Graf * * 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 . */ #include #include #include #include #include #include "cpu.h" #include "tcg-op.h" #include "qemu/log.h" #include "translate.h" #include "qemu/host-utils.h" #include "exec/gen-icount.h" #include "helper.h" #define GEN_HELPER 1 #include "helper.h" static TCGv_i64 cpu_X[32]; static TCGv_i64 cpu_pc; static TCGv_i32 cpu_NF, cpu_ZF, cpu_CF, cpu_VF; /* Load/store exclusive handling */ static TCGv_i64 cpu_exclusive_addr; static TCGv_i64 cpu_exclusive_val; static TCGv_i64 cpu_exclusive_high; #ifdef CONFIG_USER_ONLY static TCGv_i64 cpu_exclusive_test; static TCGv_i32 cpu_exclusive_info; #endif static const char *regnames[] = { "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7", "x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15", "x16", "x17", "x18", "x19", "x20", "x21", "x22", "x23", "x24", "x25", "x26", "x27", "x28", "x29", "lr", "sp" }; enum a64_shift_type { A64_SHIFT_TYPE_LSL = 0, A64_SHIFT_TYPE_LSR = 1, A64_SHIFT_TYPE_ASR = 2, A64_SHIFT_TYPE_ROR = 3 }; /* initialize TCG globals. */ void a64_translate_init(void) { int i; cpu_pc = tcg_global_mem_new_i64(TCG_AREG0, offsetof(CPUARMState, pc), "pc"); for (i = 0; i < 32; i++) { cpu_X[i] = tcg_global_mem_new_i64(TCG_AREG0, offsetof(CPUARMState, xregs[i]), regnames[i]); } cpu_NF = tcg_global_mem_new_i32(TCG_AREG0, offsetof(CPUARMState, NF), "NF"); cpu_ZF = tcg_global_mem_new_i32(TCG_AREG0, offsetof(CPUARMState, ZF), "ZF"); cpu_CF = tcg_global_mem_new_i32(TCG_AREG0, offsetof(CPUARMState, CF), "CF"); cpu_VF = tcg_global_mem_new_i32(TCG_AREG0, offsetof(CPUARMState, VF), "VF"); cpu_exclusive_addr = tcg_global_mem_new_i64(TCG_AREG0, offsetof(CPUARMState, exclusive_addr), "exclusive_addr"); cpu_exclusive_val = tcg_global_mem_new_i64(TCG_AREG0, offsetof(CPUARMState, exclusive_val), "exclusive_val"); cpu_exclusive_high = tcg_global_mem_new_i64(TCG_AREG0, offsetof(CPUARMState, exclusive_high), "exclusive_high"); #ifdef CONFIG_USER_ONLY cpu_exclusive_test = tcg_global_mem_new_i64(TCG_AREG0, offsetof(CPUARMState, exclusive_test), "exclusive_test"); cpu_exclusive_info = tcg_global_mem_new_i32(TCG_AREG0, offsetof(CPUARMState, exclusive_info), "exclusive_info"); #endif } void aarch64_cpu_dump_state(CPUState *cs, FILE *f, fprintf_function cpu_fprintf, int flags) { ARMCPU *cpu = ARM_CPU(cs); CPUARMState *env = &cpu->env; uint32_t psr = pstate_read(env); int i; cpu_fprintf(f, "PC=%016"PRIx64" SP=%016"PRIx64"\n", env->pc, env->xregs[31]); for (i = 0; i < 31; i++) { cpu_fprintf(f, "X%02d=%016"PRIx64, i, env->xregs[i]); if ((i % 4) == 3) { cpu_fprintf(f, "\n"); } else { cpu_fprintf(f, " "); } } cpu_fprintf(f, "PSTATE=%08x (flags %c%c%c%c)\n", psr, psr & PSTATE_N ? 'N' : '-', psr & PSTATE_Z ? 'Z' : '-', psr & PSTATE_C ? 'C' : '-', psr & PSTATE_V ? 'V' : '-'); cpu_fprintf(f, "\n"); if (flags & CPU_DUMP_FPU) { int numvfpregs = 32; for (i = 0; i < numvfpregs; i += 2) { uint64_t vlo = float64_val(env->vfp.regs[i * 2]); uint64_t vhi = float64_val(env->vfp.regs[(i * 2) + 1]); cpu_fprintf(f, "q%02d=%016" PRIx64 ":%016" PRIx64 " ", i, vhi, vlo); vlo = float64_val(env->vfp.regs[(i + 1) * 2]); vhi = float64_val(env->vfp.regs[((i + 1) * 2) + 1]); cpu_fprintf(f, "q%02d=%016" PRIx64 ":%016" PRIx64 "\n", i + 1, vhi, vlo); } cpu_fprintf(f, "FPCR: %08x FPSR: %08x\n", vfp_get_fpcr(env), vfp_get_fpsr(env)); } } static int get_mem_index(DisasContext *s) { #ifdef CONFIG_USER_ONLY return 1; #else return s->user; #endif } void gen_a64_set_pc_im(uint64_t val) { tcg_gen_movi_i64(cpu_pc, val); } static void gen_exception(int excp) { TCGv_i32 tmp = tcg_temp_new_i32(); tcg_gen_movi_i32(tmp, excp); gen_helper_exception(cpu_env, tmp); tcg_temp_free_i32(tmp); } static void gen_exception_insn(DisasContext *s, int offset, int excp) { gen_a64_set_pc_im(s->pc - offset); gen_exception(excp); s->is_jmp = DISAS_EXC; } static inline bool use_goto_tb(DisasContext *s, int n, uint64_t dest) { /* No direct tb linking with singlestep or deterministic io */ if (s->singlestep_enabled || (s->tb->cflags & CF_LAST_IO)) { return false; } /* Only link tbs from inside the same guest page */ if ((s->tb->pc & TARGET_PAGE_MASK) != (dest & TARGET_PAGE_MASK)) { return false; } return true; } static inline void gen_goto_tb(DisasContext *s, int n, uint64_t dest) { TranslationBlock *tb; tb = s->tb; if (use_goto_tb(s, n, dest)) { tcg_gen_goto_tb(n); gen_a64_set_pc_im(dest); tcg_gen_exit_tb((tcg_target_long)tb + n); s->is_jmp = DISAS_TB_JUMP; } else { gen_a64_set_pc_im(dest); if (s->singlestep_enabled) { gen_exception(EXCP_DEBUG); } tcg_gen_exit_tb(0); s->is_jmp = DISAS_JUMP; } } static void unallocated_encoding(DisasContext *s) { gen_exception_insn(s, 4, EXCP_UDEF); } #define unsupported_encoding(s, insn) \ do { \ qemu_log_mask(LOG_UNIMP, \ "%s:%d: unsupported instruction encoding 0x%08x " \ "at pc=%016" PRIx64 "\n", \ __FILE__, __LINE__, insn, s->pc - 4); \ unallocated_encoding(s); \ } while (0); static void init_tmp_a64_array(DisasContext *s) { #ifdef CONFIG_DEBUG_TCG int i; for (i = 0; i < ARRAY_SIZE(s->tmp_a64); i++) { TCGV_UNUSED_I64(s->tmp_a64[i]); } #endif s->tmp_a64_count = 0; } static void free_tmp_a64(DisasContext *s) { int i; for (i = 0; i < s->tmp_a64_count; i++) { tcg_temp_free_i64(s->tmp_a64[i]); } init_tmp_a64_array(s); } static TCGv_i64 new_tmp_a64(DisasContext *s) { assert(s->tmp_a64_count < TMP_A64_MAX); return s->tmp_a64[s->tmp_a64_count++] = tcg_temp_new_i64(); } static TCGv_i64 new_tmp_a64_zero(DisasContext *s) { TCGv_i64 t = new_tmp_a64(s); tcg_gen_movi_i64(t, 0); return t; } /* * Register access functions * * These functions are used for directly accessing a register in where * changes to the final register value are likely to be made. If you * need to use a register for temporary calculation (e.g. index type * operations) use the read_* form. * * B1.2.1 Register mappings * * In instruction register encoding 31 can refer to ZR (zero register) or * the SP (stack pointer) depending on context. In QEMU's case we map SP * to cpu_X[31] and ZR accesses to a temporary which can be discarded. * This is the point of the _sp forms. */ static TCGv_i64 cpu_reg(DisasContext *s, int reg) { if (reg == 31) { return new_tmp_a64_zero(s); } else { return cpu_X[reg]; } } /* register access for when 31 == SP */ static TCGv_i64 cpu_reg_sp(DisasContext *s, int reg) { return cpu_X[reg]; } /* read a cpu register in 32bit/64bit mode. Returns a TCGv_i64 * representing the register contents. This TCGv is an auto-freed * temporary so it need not be explicitly freed, and may be modified. */ static TCGv_i64 read_cpu_reg(DisasContext *s, int reg, int sf) { TCGv_i64 v = new_tmp_a64(s); if (reg != 31) { if (sf) { tcg_gen_mov_i64(v, cpu_X[reg]); } else { tcg_gen_ext32u_i64(v, cpu_X[reg]); } } else { tcg_gen_movi_i64(v, 0); } return v; } static TCGv_i64 read_cpu_reg_sp(DisasContext *s, int reg, int sf) { TCGv_i64 v = new_tmp_a64(s); if (sf) { tcg_gen_mov_i64(v, cpu_X[reg]); } else { tcg_gen_ext32u_i64(v, cpu_X[reg]); } return v; } /* Return the offset into CPUARMState of a slice (from * the least significant end) of FP register Qn (ie * Dn, Sn, Hn or Bn). * (Note that this is not the same mapping as for A32; see cpu.h) */ static inline int fp_reg_offset(int regno, TCGMemOp size) { int offs = offsetof(CPUARMState, vfp.regs[regno * 2]); #ifdef HOST_WORDS_BIGENDIAN offs += (8 - (1 << size)); #endif return offs; } /* Offset of the high half of the 128 bit vector Qn */ static inline int fp_reg_hi_offset(int regno) { return offsetof(CPUARMState, vfp.regs[regno * 2 + 1]); } /* Convenience accessors for reading and writing single and double * FP registers. Writing clears the upper parts of the associated * 128 bit vector register, as required by the architecture. * Note that unlike the GP register accessors, the values returned * by the read functions must be manually freed. */ static TCGv_i64 read_fp_dreg(DisasContext *s, int reg) { TCGv_i64 v = tcg_temp_new_i64(); tcg_gen_ld_i64(v, cpu_env, fp_reg_offset(reg, MO_64)); return v; } static TCGv_i32 read_fp_sreg(DisasContext *s, int reg) { TCGv_i32 v = tcg_temp_new_i32(); tcg_gen_ld_i32(v, cpu_env, fp_reg_offset(reg, MO_32)); return v; } static void write_fp_dreg(DisasContext *s, int reg, TCGv_i64 v) { TCGv_i64 tcg_zero = tcg_const_i64(0); tcg_gen_st_i64(v, cpu_env, fp_reg_offset(reg, MO_64)); tcg_gen_st_i64(tcg_zero, cpu_env, fp_reg_hi_offset(reg)); tcg_temp_free_i64(tcg_zero); } static void write_fp_sreg(DisasContext *s, int reg, TCGv_i32 v) { TCGv_i64 tmp = tcg_temp_new_i64(); tcg_gen_extu_i32_i64(tmp, v); write_fp_dreg(s, reg, tmp); tcg_temp_free_i64(tmp); } static TCGv_ptr get_fpstatus_ptr(void) { TCGv_ptr statusptr = tcg_temp_new_ptr(); int offset; /* In A64 all instructions (both FP and Neon) use the FPCR; * there is no equivalent of the A32 Neon "standard FPSCR value" * and all operations use vfp.fp_status. */ offset = offsetof(CPUARMState, vfp.fp_status); tcg_gen_addi_ptr(statusptr, cpu_env, offset); return statusptr; } /* Set ZF and NF based on a 64 bit result. This is alas fiddlier * than the 32 bit equivalent. */ static inline void gen_set_NZ64(TCGv_i64 result) { TCGv_i64 flag = tcg_temp_new_i64(); tcg_gen_setcondi_i64(TCG_COND_NE, flag, result, 0); tcg_gen_trunc_i64_i32(cpu_ZF, flag); tcg_gen_shri_i64(flag, result, 32); tcg_gen_trunc_i64_i32(cpu_NF, flag); tcg_temp_free_i64(flag); } /* Set NZCV as for a logical operation: NZ as per result, CV cleared. */ static inline void gen_logic_CC(int sf, TCGv_i64 result) { if (sf) { gen_set_NZ64(result); } else { tcg_gen_trunc_i64_i32(cpu_ZF, result); tcg_gen_trunc_i64_i32(cpu_NF, result); } tcg_gen_movi_i32(cpu_CF, 0); tcg_gen_movi_i32(cpu_VF, 0); } /* dest = T0 + T1; compute C, N, V and Z flags */ static void gen_add_CC(int sf, TCGv_i64 dest, TCGv_i64 t0, TCGv_i64 t1) { if (sf) { TCGv_i64 result, flag, tmp; result = tcg_temp_new_i64(); flag = tcg_temp_new_i64(); tmp = tcg_temp_new_i64(); tcg_gen_movi_i64(tmp, 0); tcg_gen_add2_i64(result, flag, t0, tmp, t1, tmp); tcg_gen_trunc_i64_i32(cpu_CF, flag); gen_set_NZ64(result); tcg_gen_xor_i64(flag, result, t0); tcg_gen_xor_i64(tmp, t0, t1); tcg_gen_andc_i64(flag, flag, tmp); tcg_temp_free_i64(tmp); tcg_gen_shri_i64(flag, flag, 32); tcg_gen_trunc_i64_i32(cpu_VF, flag); tcg_gen_mov_i64(dest, result); tcg_temp_free_i64(result); tcg_temp_free_i64(flag); } else { /* 32 bit arithmetic */ TCGv_i32 t0_32 = tcg_temp_new_i32(); TCGv_i32 t1_32 = tcg_temp_new_i32(); TCGv_i32 tmp = tcg_temp_new_i32(); tcg_gen_movi_i32(tmp, 0); tcg_gen_trunc_i64_i32(t0_32, t0); tcg_gen_trunc_i64_i32(t1_32, t1); tcg_gen_add2_i32(cpu_NF, cpu_CF, t0_32, tmp, t1_32, tmp); tcg_gen_mov_i32(cpu_ZF, cpu_NF); tcg_gen_xor_i32(cpu_VF, cpu_NF, t0_32); tcg_gen_xor_i32(tmp, t0_32, t1_32); tcg_gen_andc_i32(cpu_VF, cpu_VF, tmp); tcg_gen_extu_i32_i64(dest, cpu_NF); tcg_temp_free_i32(tmp); tcg_temp_free_i32(t0_32); tcg_temp_free_i32(t1_32); } } /* dest = T0 - T1; compute C, N, V and Z flags */ static void gen_sub_CC(int sf, TCGv_i64 dest, TCGv_i64 t0, TCGv_i64 t1) { if (sf) { /* 64 bit arithmetic */ TCGv_i64 result, flag, tmp; result = tcg_temp_new_i64(); flag = tcg_temp_new_i64(); tcg_gen_sub_i64(result, t0, t1); gen_set_NZ64(result); tcg_gen_setcond_i64(TCG_COND_GEU, flag, t0, t1); tcg_gen_trunc_i64_i32(cpu_CF, flag); tcg_gen_xor_i64(flag, result, t0); tmp = tcg_temp_new_i64(); tcg_gen_xor_i64(tmp, t0, t1); tcg_gen_and_i64(flag, flag, tmp); tcg_temp_free_i64(tmp); tcg_gen_shri_i64(flag, flag, 32); tcg_gen_trunc_i64_i32(cpu_VF, flag); tcg_gen_mov_i64(dest, result); tcg_temp_free_i64(flag); tcg_temp_free_i64(result); } else { /* 32 bit arithmetic */ TCGv_i32 t0_32 = tcg_temp_new_i32(); TCGv_i32 t1_32 = tcg_temp_new_i32(); TCGv_i32 tmp; tcg_gen_trunc_i64_i32(t0_32, t0); tcg_gen_trunc_i64_i32(t1_32, t1); tcg_gen_sub_i32(cpu_NF, t0_32, t1_32); tcg_gen_mov_i32(cpu_ZF, cpu_NF); tcg_gen_setcond_i32(TCG_COND_GEU, cpu_CF, t0_32, t1_32); tcg_gen_xor_i32(cpu_VF, cpu_NF, t0_32); tmp = tcg_temp_new_i32(); tcg_gen_xor_i32(tmp, t0_32, t1_32); tcg_temp_free_i32(t0_32); tcg_temp_free_i32(t1_32); tcg_gen_and_i32(cpu_VF, cpu_VF, tmp); tcg_temp_free_i32(tmp); tcg_gen_extu_i32_i64(dest, cpu_NF); } } /* dest = T0 + T1 + CF; do not compute flags. */ static void gen_adc(int sf, TCGv_i64 dest, TCGv_i64 t0, TCGv_i64 t1) { TCGv_i64 flag = tcg_temp_new_i64(); tcg_gen_extu_i32_i64(flag, cpu_CF); tcg_gen_add_i64(dest, t0, t1); tcg_gen_add_i64(dest, dest, flag); tcg_temp_free_i64(flag); if (!sf) { tcg_gen_ext32u_i64(dest, dest); } } /* dest = T0 + T1 + CF; compute C, N, V and Z flags. */ static void gen_adc_CC(int sf, TCGv_i64 dest, TCGv_i64 t0, TCGv_i64 t1) { if (sf) { TCGv_i64 result, cf_64, vf_64, tmp; result = tcg_temp_new_i64(); cf_64 = tcg_temp_new_i64(); vf_64 = tcg_temp_new_i64(); tmp = tcg_const_i64(0); tcg_gen_extu_i32_i64(cf_64, cpu_CF); tcg_gen_add2_i64(result, cf_64, t0, tmp, cf_64, tmp); tcg_gen_add2_i64(result, cf_64, result, cf_64, t1, tmp); tcg_gen_trunc_i64_i32(cpu_CF, cf_64); gen_set_NZ64(result); tcg_gen_xor_i64(vf_64, result, t0); tcg_gen_xor_i64(tmp, t0, t1); tcg_gen_andc_i64(vf_64, vf_64, tmp); tcg_gen_shri_i64(vf_64, vf_64, 32); tcg_gen_trunc_i64_i32(cpu_VF, vf_64); tcg_gen_mov_i64(dest, result); tcg_temp_free_i64(tmp); tcg_temp_free_i64(vf_64); tcg_temp_free_i64(cf_64); tcg_temp_free_i64(result); } else { TCGv_i32 t0_32, t1_32, tmp; t0_32 = tcg_temp_new_i32(); t1_32 = tcg_temp_new_i32(); tmp = tcg_const_i32(0); tcg_gen_trunc_i64_i32(t0_32, t0); tcg_gen_trunc_i64_i32(t1_32, t1); tcg_gen_add2_i32(cpu_NF, cpu_CF, t0_32, tmp, cpu_CF, tmp); tcg_gen_add2_i32(cpu_NF, cpu_CF, cpu_NF, cpu_CF, t1_32, tmp); tcg_gen_mov_i32(cpu_ZF, cpu_NF); tcg_gen_xor_i32(cpu_VF, cpu_NF, t0_32); tcg_gen_xor_i32(tmp, t0_32, t1_32); tcg_gen_andc_i32(cpu_VF, cpu_VF, tmp); tcg_gen_extu_i32_i64(dest, cpu_NF); tcg_temp_free_i32(tmp); tcg_temp_free_i32(t1_32); tcg_temp_free_i32(t0_32); } } /* * Load/Store generators */ /* * Store from GPR register to memory */ static void do_gpr_st(DisasContext *s, TCGv_i64 source, TCGv_i64 tcg_addr, int size) { g_assert(size <= 3); tcg_gen_qemu_st_i64(source, tcg_addr, get_mem_index(s), MO_TE + size); } /* * Load from memory to GPR register */ static void do_gpr_ld(DisasContext *s, TCGv_i64 dest, TCGv_i64 tcg_addr, int size, bool is_signed, bool extend) { TCGMemOp memop = MO_TE + size; g_assert(size <= 3); if (is_signed) { memop += MO_SIGN; } tcg_gen_qemu_ld_i64(dest, tcg_addr, get_mem_index(s), memop); if (extend && is_signed) { g_assert(size < 3); tcg_gen_ext32u_i64(dest, dest); } } /* * Store from FP register to memory */ static void do_fp_st(DisasContext *s, int srcidx, TCGv_i64 tcg_addr, int size) { /* This writes the bottom N bits of a 128 bit wide vector to memory */ TCGv_i64 tmp = tcg_temp_new_i64(); tcg_gen_ld_i64(tmp, cpu_env, fp_reg_offset(srcidx, MO_64)); if (size < 4) { tcg_gen_qemu_st_i64(tmp, tcg_addr, get_mem_index(s), MO_TE + size); } else { TCGv_i64 tcg_hiaddr = tcg_temp_new_i64(); tcg_gen_qemu_st_i64(tmp, tcg_addr, get_mem_index(s), MO_TEQ); tcg_gen_qemu_st64(tmp, tcg_addr, get_mem_index(s)); tcg_gen_ld_i64(tmp, cpu_env, fp_reg_hi_offset(srcidx)); tcg_gen_addi_i64(tcg_hiaddr, tcg_addr, 8); tcg_gen_qemu_st_i64(tmp, tcg_hiaddr, get_mem_index(s), MO_TEQ); tcg_temp_free_i64(tcg_hiaddr); } tcg_temp_free_i64(tmp); } /* * Load from memory to FP register */ static void do_fp_ld(DisasContext *s, int destidx, TCGv_i64 tcg_addr, int size) { /* This always zero-extends and writes to a full 128 bit wide vector */ TCGv_i64 tmplo = tcg_temp_new_i64(); TCGv_i64 tmphi; if (size < 4) { TCGMemOp memop = MO_TE + size; tmphi = tcg_const_i64(0); tcg_gen_qemu_ld_i64(tmplo, tcg_addr, get_mem_index(s), memop); } else { TCGv_i64 tcg_hiaddr; tmphi = tcg_temp_new_i64(); tcg_hiaddr = tcg_temp_new_i64(); tcg_gen_qemu_ld_i64(tmplo, tcg_addr, get_mem_index(s), MO_TEQ); tcg_gen_addi_i64(tcg_hiaddr, tcg_addr, 8); tcg_gen_qemu_ld_i64(tmphi, tcg_hiaddr, get_mem_index(s), MO_TEQ); tcg_temp_free_i64(tcg_hiaddr); } tcg_gen_st_i64(tmplo, cpu_env, fp_reg_offset(destidx, MO_64)); tcg_gen_st_i64(tmphi, cpu_env, fp_reg_hi_offset(destidx)); tcg_temp_free_i64(tmplo); tcg_temp_free_i64(tmphi); } /* * This utility function is for doing register extension with an * optional shift. You will likely want to pass a temporary for the * destination register. See DecodeRegExtend() in the ARM ARM. */ static void ext_and_shift_reg(TCGv_i64 tcg_out, TCGv_i64 tcg_in, int option, unsigned int shift) { int extsize = extract32(option, 0, 2); bool is_signed = extract32(option, 2, 1); if (is_signed) { switch (extsize) { case 0: tcg_gen_ext8s_i64(tcg_out, tcg_in); break; case 1: tcg_gen_ext16s_i64(tcg_out, tcg_in); break; case 2: tcg_gen_ext32s_i64(tcg_out, tcg_in); break; case 3: tcg_gen_mov_i64(tcg_out, tcg_in); break; } } else { switch (extsize) { case 0: tcg_gen_ext8u_i64(tcg_out, tcg_in); break; case 1: tcg_gen_ext16u_i64(tcg_out, tcg_in); break; case 2: tcg_gen_ext32u_i64(tcg_out, tcg_in); break; case 3: tcg_gen_mov_i64(tcg_out, tcg_in); break; } } if (shift) { tcg_gen_shli_i64(tcg_out, tcg_out, shift); } } static inline void gen_check_sp_alignment(DisasContext *s) { /* The AArch64 architecture mandates that (if enabled via PSTATE * or SCTLR bits) there is a check that SP is 16-aligned on every * SP-relative load or store (with an exception generated if it is not). * In line with general QEMU practice regarding misaligned accesses, * we omit these checks for the sake of guest program performance. * This function is provided as a hook so we can more easily add these * checks in future (possibly as a "favour catching guest program bugs * over speed" user selectable option). */ } /* * the instruction disassembly implemented here matches * the instruction encoding classifications in chapter 3 (C3) * of the ARM Architecture Reference Manual (DDI0487A_a) */ /* C3.2.7 Unconditional branch (immediate) * 31 30 26 25 0 * +----+-----------+-------------------------------------+ * | op | 0 0 1 0 1 | imm26 | * +----+-----------+-------------------------------------+ */ static void disas_uncond_b_imm(DisasContext *s, uint32_t insn) { uint64_t addr = s->pc + sextract32(insn, 0, 26) * 4 - 4; if (insn & (1 << 31)) { /* C5.6.26 BL Branch with link */ tcg_gen_movi_i64(cpu_reg(s, 30), s->pc); } /* C5.6.20 B Branch / C5.6.26 BL Branch with link */ gen_goto_tb(s, 0, addr); } /* C3.2.1 Compare & branch (immediate) * 31 30 25 24 23 5 4 0 * +----+-------------+----+---------------------+--------+ * | sf | 0 1 1 0 1 0 | op | imm19 | Rt | * +----+-------------+----+---------------------+--------+ */ static void disas_comp_b_imm(DisasContext *s, uint32_t insn) { unsigned int sf, op, rt; uint64_t addr; int label_match; TCGv_i64 tcg_cmp; sf = extract32(insn, 31, 1); op = extract32(insn, 24, 1); /* 0: CBZ; 1: CBNZ */ rt = extract32(insn, 0, 5); addr = s->pc + sextract32(insn, 5, 19) * 4 - 4; tcg_cmp = read_cpu_reg(s, rt, sf); label_match = gen_new_label(); tcg_gen_brcondi_i64(op ? TCG_COND_NE : TCG_COND_EQ, tcg_cmp, 0, label_match); gen_goto_tb(s, 0, s->pc); gen_set_label(label_match); gen_goto_tb(s, 1, addr); } /* C3.2.5 Test & branch (immediate) * 31 30 25 24 23 19 18 5 4 0 * +----+-------------+----+-------+-------------+------+ * | b5 | 0 1 1 0 1 1 | op | b40 | imm14 | Rt | * +----+-------------+----+-------+-------------+------+ */ static void disas_test_b_imm(DisasContext *s, uint32_t insn) { unsigned int bit_pos, op, rt; uint64_t addr; int label_match; TCGv_i64 tcg_cmp; bit_pos = (extract32(insn, 31, 1) << 5) | extract32(insn, 19, 5); op = extract32(insn, 24, 1); /* 0: TBZ; 1: TBNZ */ addr = s->pc + sextract32(insn, 5, 14) * 4 - 4; rt = extract32(insn, 0, 5); tcg_cmp = tcg_temp_new_i64(); tcg_gen_andi_i64(tcg_cmp, cpu_reg(s, rt), (1ULL << bit_pos)); label_match = gen_new_label(); tcg_gen_brcondi_i64(op ? TCG_COND_NE : TCG_COND_EQ, tcg_cmp, 0, label_match); tcg_temp_free_i64(tcg_cmp); gen_goto_tb(s, 0, s->pc); gen_set_label(label_match); gen_goto_tb(s, 1, addr); } /* C3.2.2 / C5.6.19 Conditional branch (immediate) * 31 25 24 23 5 4 3 0 * +---------------+----+---------------------+----+------+ * | 0 1 0 1 0 1 0 | o1 | imm19 | o0 | cond | * +---------------+----+---------------------+----+------+ */ static void disas_cond_b_imm(DisasContext *s, uint32_t insn) { unsigned int cond; uint64_t addr; if ((insn & (1 << 4)) || (insn & (1 << 24))) { unallocated_encoding(s); return; } addr = s->pc + sextract32(insn, 5, 19) * 4 - 4; cond = extract32(insn, 0, 4); if (cond < 0x0e) { /* genuinely conditional branches */ int label_match = gen_new_label(); arm_gen_test_cc(cond, label_match); gen_goto_tb(s, 0, s->pc); gen_set_label(label_match); gen_goto_tb(s, 1, addr); } else { /* 0xe and 0xf are both "always" conditions */ gen_goto_tb(s, 0, addr); } } /* C5.6.68 HINT */ static void handle_hint(DisasContext *s, uint32_t insn, unsigned int op1, unsigned int op2, unsigned int crm) { unsigned int selector = crm << 3 | op2; if (op1 != 3) { unallocated_encoding(s); return; } switch (selector) { case 0: /* NOP */ return; case 1: /* YIELD */ case 2: /* WFE */ case 3: /* WFI */ case 4: /* SEV */ case 5: /* SEVL */ /* we treat all as NOP at least for now */ return; default: /* default specified as NOP equivalent */ return; } } static void gen_clrex(DisasContext *s, uint32_t insn) { tcg_gen_movi_i64(cpu_exclusive_addr, -1); } /* CLREX, DSB, DMB, ISB */ static void handle_sync(DisasContext *s, uint32_t insn, unsigned int op1, unsigned int op2, unsigned int crm) { if (op1 != 3) { unallocated_encoding(s); return; } switch (op2) { case 2: /* CLREX */ gen_clrex(s, insn); return; case 4: /* DSB */ case 5: /* DMB */ case 6: /* ISB */ /* We don't emulate caches so barriers are no-ops */ return; default: unallocated_encoding(s); return; } } /* C5.6.130 MSR (immediate) - move immediate to processor state field */ static void handle_msr_i(DisasContext *s, uint32_t insn, unsigned int op1, unsigned int op2, unsigned int crm) { unsupported_encoding(s, insn); } static void gen_get_nzcv(TCGv_i64 tcg_rt) { TCGv_i32 tmp = tcg_temp_new_i32(); TCGv_i32 nzcv = tcg_temp_new_i32(); /* build bit 31, N */ tcg_gen_andi_i32(nzcv, cpu_NF, (1 << 31)); /* build bit 30, Z */ tcg_gen_setcondi_i32(TCG_COND_EQ, tmp, cpu_ZF, 0); tcg_gen_deposit_i32(nzcv, nzcv, tmp, 30, 1); /* build bit 29, C */ tcg_gen_deposit_i32(nzcv, nzcv, cpu_CF, 29, 1); /* build bit 28, V */ tcg_gen_shri_i32(tmp, cpu_VF, 31); tcg_gen_deposit_i32(nzcv, nzcv, tmp, 28, 1); /* generate result */ tcg_gen_extu_i32_i64(tcg_rt, nzcv); tcg_temp_free_i32(nzcv); tcg_temp_free_i32(tmp); } static void gen_set_nzcv(TCGv_i64 tcg_rt) { TCGv_i32 nzcv = tcg_temp_new_i32(); /* take NZCV from R[t] */ tcg_gen_trunc_i64_i32(nzcv, tcg_rt); /* bit 31, N */ tcg_gen_andi_i32(cpu_NF, nzcv, (1 << 31)); /* bit 30, Z */ tcg_gen_andi_i32(cpu_ZF, nzcv, (1 << 30)); tcg_gen_setcondi_i32(TCG_COND_EQ, cpu_ZF, cpu_ZF, 0); /* bit 29, C */ tcg_gen_andi_i32(cpu_CF, nzcv, (1 << 29)); tcg_gen_shri_i32(cpu_CF, cpu_CF, 29); /* bit 28, V */ tcg_gen_andi_i32(cpu_VF, nzcv, (1 << 28)); tcg_gen_shli_i32(cpu_VF, cpu_VF, 3); tcg_temp_free_i32(nzcv); } /* C5.6.129 MRS - move from system register * C5.6.131 MSR (register) - move to system register * C5.6.204 SYS * C5.6.205 SYSL * These are all essentially the same insn in 'read' and 'write' * versions, with varying op0 fields. */ static void handle_sys(DisasContext *s, uint32_t insn, bool isread, unsigned int op0, unsigned int op1, unsigned int op2, unsigned int crn, unsigned int crm, unsigned int rt) { const ARMCPRegInfo *ri; TCGv_i64 tcg_rt; ri = get_arm_cp_reginfo(s->cp_regs, ENCODE_AA64_CP_REG(CP_REG_ARM64_SYSREG_CP, crn, crm, op0, op1, op2)); if (!ri) { /* Unknown register */ unallocated_encoding(s); return; } /* Check access permissions */ if (!cp_access_ok(s->current_pl, ri, isread)) { unallocated_encoding(s); return; } /* Handle special cases first */ switch (ri->type & ~(ARM_CP_FLAG_MASK & ~ARM_CP_SPECIAL)) { case ARM_CP_NOP: return; case ARM_CP_NZCV: tcg_rt = cpu_reg(s, rt); if (isread) { gen_get_nzcv(tcg_rt); } else { gen_set_nzcv(tcg_rt); } return; default: break; } if (use_icount && (ri->type & ARM_CP_IO)) { gen_io_start(); } tcg_rt = cpu_reg(s, rt); if (isread) { if (ri->type & ARM_CP_CONST) { tcg_gen_movi_i64(tcg_rt, ri->resetvalue); } else if (ri->readfn) { TCGv_ptr tmpptr; gen_a64_set_pc_im(s->pc - 4); tmpptr = tcg_const_ptr(ri); gen_helper_get_cp_reg64(tcg_rt, cpu_env, tmpptr); tcg_temp_free_ptr(tmpptr); } else { tcg_gen_ld_i64(tcg_rt, cpu_env, ri->fieldoffset); } } else { if (ri->type & ARM_CP_CONST) { /* If not forbidden by access permissions, treat as WI */ return; } else if (ri->writefn) { TCGv_ptr tmpptr; gen_a64_set_pc_im(s->pc - 4); tmpptr = tcg_const_ptr(ri); gen_helper_set_cp_reg64(cpu_env, tmpptr, tcg_rt); tcg_temp_free_ptr(tmpptr); } else { tcg_gen_st_i64(tcg_rt, cpu_env, ri->fieldoffset); } } if (use_icount && (ri->type & ARM_CP_IO)) { /* I/O operations must end the TB here (whether read or write) */ gen_io_end(); s->is_jmp = DISAS_UPDATE; } else if (!isread && !(ri->type & ARM_CP_SUPPRESS_TB_END)) { /* We default to ending the TB on a coprocessor register write, * but allow this to be suppressed by the register definition * (usually only necessary to work around guest bugs). */ s->is_jmp = DISAS_UPDATE; } } /* C3.2.4 System * 31 22 21 20 19 18 16 15 12 11 8 7 5 4 0 * +---------------------+---+-----+-----+-------+-------+-----+------+ * | 1 1 0 1 0 1 0 1 0 0 | L | op0 | op1 | CRn | CRm | op2 | Rt | * +---------------------+---+-----+-----+-------+-------+-----+------+ */ static void disas_system(DisasContext *s, uint32_t insn) { unsigned int l, op0, op1, crn, crm, op2, rt; l = extract32(insn, 21, 1); op0 = extract32(insn, 19, 2); op1 = extract32(insn, 16, 3); crn = extract32(insn, 12, 4); crm = extract32(insn, 8, 4); op2 = extract32(insn, 5, 3); rt = extract32(insn, 0, 5); if (op0 == 0) { if (l || rt != 31) { unallocated_encoding(s); return; } switch (crn) { case 2: /* C5.6.68 HINT */ handle_hint(s, insn, op1, op2, crm); break; case 3: /* CLREX, DSB, DMB, ISB */ handle_sync(s, insn, op1, op2, crm); break; case 4: /* C5.6.130 MSR (immediate) */ handle_msr_i(s, insn, op1, op2, crm); break; default: unallocated_encoding(s); break; } return; } handle_sys(s, insn, l, op0, op1, op2, crn, crm, rt); } /* C3.2.3 Exception generation * * 31 24 23 21 20 5 4 2 1 0 * +-----------------+-----+------------------------+-----+----+ * | 1 1 0 1 0 1 0 0 | opc | imm16 | op2 | LL | * +-----------------------+------------------------+----------+ */ static void disas_exc(DisasContext *s, uint32_t insn) { int opc = extract32(insn, 21, 3); int op2_ll = extract32(insn, 0, 5); switch (opc) { case 0: /* SVC, HVC, SMC; since we don't support the Virtualization * or TrustZone extensions these all UNDEF except SVC. */ if (op2_ll != 1) { unallocated_encoding(s); break; } gen_exception_insn(s, 0, EXCP_SWI); break; case 1: if (op2_ll != 0) { unallocated_encoding(s); break; } /* BRK */ gen_exception_insn(s, 0, EXCP_BKPT); break; case 2: if (op2_ll != 0) { unallocated_encoding(s); break; } /* HLT */ unsupported_encoding(s, insn); break; case 5: if (op2_ll < 1 || op2_ll > 3) { unallocated_encoding(s); break; } /* DCPS1, DCPS2, DCPS3 */ unsupported_encoding(s, insn); break; default: unallocated_encoding(s); break; } } /* C3.2.7 Unconditional branch (register) * 31 25 24 21 20 16 15 10 9 5 4 0 * +---------------+-------+-------+-------+------+-------+ * | 1 1 0 1 0 1 1 | opc | op2 | op3 | Rn | op4 | * +---------------+-------+-------+-------+------+-------+ */ static void disas_uncond_b_reg(DisasContext *s, uint32_t insn) { unsigned int opc, op2, op3, rn, op4; opc = extract32(insn, 21, 4); op2 = extract32(insn, 16, 5); op3 = extract32(insn, 10, 6); rn = extract32(insn, 5, 5); op4 = extract32(insn, 0, 5); if (op4 != 0x0 || op3 != 0x0 || op2 != 0x1f) { unallocated_encoding(s); return; } switch (opc) { case 0: /* BR */ case 2: /* RET */ break; case 1: /* BLR */ tcg_gen_movi_i64(cpu_reg(s, 30), s->pc); break; case 4: /* ERET */ case 5: /* DRPS */ if (rn != 0x1f) { unallocated_encoding(s); } else { unsupported_encoding(s, insn); } return; default: unallocated_encoding(s); return; } tcg_gen_mov_i64(cpu_pc, cpu_reg(s, rn)); s->is_jmp = DISAS_JUMP; } /* C3.2 Branches, exception generating and system instructions */ static void disas_b_exc_sys(DisasContext *s, uint32_t insn) { switch (extract32(insn, 25, 7)) { case 0x0a: case 0x0b: case 0x4a: case 0x4b: /* Unconditional branch (immediate) */ disas_uncond_b_imm(s, insn); break; case 0x1a: case 0x5a: /* Compare & branch (immediate) */ disas_comp_b_imm(s, insn); break; case 0x1b: case 0x5b: /* Test & branch (immediate) */ disas_test_b_imm(s, insn); break; case 0x2a: /* Conditional branch (immediate) */ disas_cond_b_imm(s, insn); break; case 0x6a: /* Exception generation / System */ if (insn & (1 << 24)) { disas_system(s, insn); } else { disas_exc(s, insn); } break; case 0x6b: /* Unconditional branch (register) */ disas_uncond_b_reg(s, insn); break; default: unallocated_encoding(s); break; } } /* * Load/Store exclusive instructions are implemented by remembering * the value/address loaded, and seeing if these are the same * when the store is performed. This is not actually the architecturally * mandated semantics, but it works for typical guest code sequences * and avoids having to monitor regular stores. * * In system emulation mode only one CPU will be running at once, so * this sequence is effectively atomic. In user emulation mode we * throw an exception and handle the atomic operation elsewhere. */ static void gen_load_exclusive(DisasContext *s, int rt, int rt2, TCGv_i64 addr, int size, bool is_pair) { TCGv_i64 tmp = tcg_temp_new_i64(); TCGMemOp memop = MO_TE + size; g_assert(size <= 3); tcg_gen_qemu_ld_i64(tmp, addr, get_mem_index(s), memop); if (is_pair) { TCGv_i64 addr2 = tcg_temp_new_i64(); TCGv_i64 hitmp = tcg_temp_new_i64(); g_assert(size >= 2); tcg_gen_addi_i64(addr2, addr, 1 << size); tcg_gen_qemu_ld_i64(hitmp, addr2, get_mem_index(s), memop); tcg_temp_free_i64(addr2); tcg_gen_mov_i64(cpu_exclusive_high, hitmp); tcg_gen_mov_i64(cpu_reg(s, rt2), hitmp); tcg_temp_free_i64(hitmp); } tcg_gen_mov_i64(cpu_exclusive_val, tmp); tcg_gen_mov_i64(cpu_reg(s, rt), tmp); tcg_temp_free_i64(tmp); tcg_gen_mov_i64(cpu_exclusive_addr, addr); } #ifdef CONFIG_USER_ONLY static void gen_store_exclusive(DisasContext *s, int rd, int rt, int rt2, TCGv_i64 addr, int size, int is_pair) { tcg_gen_mov_i64(cpu_exclusive_test, addr); tcg_gen_movi_i32(cpu_exclusive_info, size | is_pair << 2 | (rd << 4) | (rt << 9) | (rt2 << 14)); gen_exception_insn(s, 4, EXCP_STREX); } #else static void gen_store_exclusive(DisasContext *s, int rd, int rt, int rt2, TCGv_i64 addr, int size, int is_pair) { qemu_log_mask(LOG_UNIMP, "%s:%d: system mode store_exclusive unsupported " "at pc=%016" PRIx64 "\n", __FILE__, __LINE__, s->pc - 4); } #endif /* C3.3.6 Load/store exclusive * * 31 30 29 24 23 22 21 20 16 15 14 10 9 5 4 0 * +-----+-------------+----+---+----+------+----+-------+------+------+ * | sz | 0 0 1 0 0 0 | o2 | L | o1 | Rs | o0 | Rt2 | Rn | Rt | * +-----+-------------+----+---+----+------+----+-------+------+------+ * * sz: 00 -> 8 bit, 01 -> 16 bit, 10 -> 32 bit, 11 -> 64 bit * L: 0 -> store, 1 -> load * o2: 0 -> exclusive, 1 -> not * o1: 0 -> single register, 1 -> register pair * o0: 1 -> load-acquire/store-release, 0 -> not * * o0 == 0 AND o2 == 1 is un-allocated * o1 == 1 is un-allocated except for 32 and 64 bit sizes */ static void disas_ldst_excl(DisasContext *s, uint32_t insn) { int rt = extract32(insn, 0, 5); int rn = extract32(insn, 5, 5); int rt2 = extract32(insn, 10, 5); int is_lasr = extract32(insn, 15, 1); int rs = extract32(insn, 16, 5); int is_pair = extract32(insn, 21, 1); int is_store = !extract32(insn, 22, 1); int is_excl = !extract32(insn, 23, 1); int size = extract32(insn, 30, 2); TCGv_i64 tcg_addr; if ((!is_excl && !is_lasr) || (is_pair && size < 2)) { unallocated_encoding(s); return; } if (rn == 31) { gen_check_sp_alignment(s); } tcg_addr = read_cpu_reg_sp(s, rn, 1); /* Note that since TCG is single threaded load-acquire/store-release * semantics require no extra if (is_lasr) { ... } handling. */ if (is_excl) { if (!is_store) { gen_load_exclusive(s, rt, rt2, tcg_addr, size, is_pair); } else { gen_store_exclusive(s, rs, rt, rt2, tcg_addr, size, is_pair); } } else { TCGv_i64 tcg_rt = cpu_reg(s, rt); if (is_store) { do_gpr_st(s, tcg_rt, tcg_addr, size); } else { do_gpr_ld(s, tcg_rt, tcg_addr, size, false, false); } if (is_pair) { TCGv_i64 tcg_rt2 = cpu_reg(s, rt); tcg_gen_addi_i64(tcg_addr, tcg_addr, 1 << size); if (is_store) { do_gpr_st(s, tcg_rt2, tcg_addr, size); } else { do_gpr_ld(s, tcg_rt2, tcg_addr, size, false, false); } } } } /* * C3.3.5 Load register (literal) * * 31 30 29 27 26 25 24 23 5 4 0 * +-----+-------+---+-----+-------------------+-------+ * | opc | 0 1 1 | V | 0 0 | imm19 | Rt | * +-----+-------+---+-----+-------------------+-------+ * * V: 1 -> vector (simd/fp) * opc (non-vector): 00 -> 32 bit, 01 -> 64 bit, * 10-> 32 bit signed, 11 -> prefetch * opc (vector): 00 -> 32 bit, 01 -> 64 bit, 10 -> 128 bit (11 unallocated) */ static void disas_ld_lit(DisasContext *s, uint32_t insn) { int rt = extract32(insn, 0, 5); int64_t imm = sextract32(insn, 5, 19) << 2; bool is_vector = extract32(insn, 26, 1); int opc = extract32(insn, 30, 2); bool is_signed = false; int size = 2; TCGv_i64 tcg_rt, tcg_addr; if (is_vector) { if (opc == 3) { unallocated_encoding(s); return; } size = 2 + opc; } else { if (opc == 3) { /* PRFM (literal) : prefetch */ return; } size = 2 + extract32(opc, 0, 1); is_signed = extract32(opc, 1, 1); } tcg_rt = cpu_reg(s, rt); tcg_addr = tcg_const_i64((s->pc - 4) + imm); if (is_vector) { do_fp_ld(s, rt, tcg_addr, size); } else { do_gpr_ld(s, tcg_rt, tcg_addr, size, is_signed, false); } tcg_temp_free_i64(tcg_addr); } /* * C5.6.80 LDNP (Load Pair - non-temporal hint) * C5.6.81 LDP (Load Pair - non vector) * C5.6.82 LDPSW (Load Pair Signed Word - non vector) * C5.6.176 STNP (Store Pair - non-temporal hint) * C5.6.177 STP (Store Pair - non vector) * C6.3.165 LDNP (Load Pair of SIMD&FP - non-temporal hint) * C6.3.165 LDP (Load Pair of SIMD&FP) * C6.3.284 STNP (Store Pair of SIMD&FP - non-temporal hint) * C6.3.284 STP (Store Pair of SIMD&FP) * * 31 30 29 27 26 25 24 23 22 21 15 14 10 9 5 4 0 * +-----+-------+---+---+-------+---+-----------------------------+ * | opc | 1 0 1 | V | 0 | index | L | imm7 | Rt2 | Rn | Rt | * +-----+-------+---+---+-------+---+-------+-------+------+------+ * * opc: LDP/STP/LDNP/STNP 00 -> 32 bit, 10 -> 64 bit * LDPSW 01 * LDP/STP/LDNP/STNP (SIMD) 00 -> 32 bit, 01 -> 64 bit, 10 -> 128 bit * V: 0 -> GPR, 1 -> Vector * idx: 00 -> signed offset with non-temporal hint, 01 -> post-index, * 10 -> signed offset, 11 -> pre-index * L: 0 -> Store 1 -> Load * * Rt, Rt2 = GPR or SIMD registers to be stored * Rn = general purpose register containing address * imm7 = signed offset (multiple of 4 or 8 depending on size) */ static void disas_ldst_pair(DisasContext *s, uint32_t insn) { int rt = extract32(insn, 0, 5); int rn = extract32(insn, 5, 5); int rt2 = extract32(insn, 10, 5); int64_t offset = sextract32(insn, 15, 7); int index = extract32(insn, 23, 2); bool is_vector = extract32(insn, 26, 1); bool is_load = extract32(insn, 22, 1); int opc = extract32(insn, 30, 2); bool is_signed = false; bool postindex = false; bool wback = false; TCGv_i64 tcg_addr; /* calculated address */ int size; if (opc == 3) { unallocated_encoding(s); return; } if (is_vector) { size = 2 + opc; } else { size = 2 + extract32(opc, 1, 1); is_signed = extract32(opc, 0, 1); if (!is_load && is_signed) { unallocated_encoding(s); return; } } switch (index) { case 1: /* post-index */ postindex = true; wback = true; break; case 0: /* signed offset with "non-temporal" hint. Since we don't emulate * caches we don't care about hints to the cache system about * data access patterns, and handle this identically to plain * signed offset. */ if (is_signed) { /* There is no non-temporal-hint version of LDPSW */ unallocated_encoding(s); return; } postindex = false; break; case 2: /* signed offset, rn not updated */ postindex = false; break; case 3: /* pre-index */ postindex = false; wback = true; break; } offset <<= size; if (rn == 31) { gen_check_sp_alignment(s); } tcg_addr = read_cpu_reg_sp(s, rn, 1); if (!postindex) { tcg_gen_addi_i64(tcg_addr, tcg_addr, offset); } if (is_vector) { if (is_load) { do_fp_ld(s, rt, tcg_addr, size); } else { do_fp_st(s, rt, tcg_addr, size); } } else { TCGv_i64 tcg_rt = cpu_reg(s, rt); if (is_load) { do_gpr_ld(s, tcg_rt, tcg_addr, size, is_signed, false); } else { do_gpr_st(s, tcg_rt, tcg_addr, size); } } tcg_gen_addi_i64(tcg_addr, tcg_addr, 1 << size); if (is_vector) { if (is_load) { do_fp_ld(s, rt2, tcg_addr, size); } else { do_fp_st(s, rt2, tcg_addr, size); } } else { TCGv_i64 tcg_rt2 = cpu_reg(s, rt2); if (is_load) { do_gpr_ld(s, tcg_rt2, tcg_addr, size, is_signed, false); } else { do_gpr_st(s, tcg_rt2, tcg_addr, size); } } if (wback) { if (postindex) { tcg_gen_addi_i64(tcg_addr, tcg_addr, offset - (1 << size)); } else { tcg_gen_subi_i64(tcg_addr, tcg_addr, 1 << size); } tcg_gen_mov_i64(cpu_reg_sp(s, rn), tcg_addr); } } /* * C3.3.8 Load/store (immediate post-indexed) * C3.3.9 Load/store (immediate pre-indexed) * C3.3.12 Load/store (unscaled immediate) * * 31 30 29 27 26 25 24 23 22 21 20 12 11 10 9 5 4 0 * +----+-------+---+-----+-----+---+--------+-----+------+------+ * |size| 1 1 1 | V | 0 0 | opc | 0 | imm9 | idx | Rn | Rt | * +----+-------+---+-----+-----+---+--------+-----+------+------+ * * idx = 01 -> post-indexed, 11 pre-indexed, 00 unscaled imm. (no writeback) * V = 0 -> non-vector * size: 00 -> 8 bit, 01 -> 16 bit, 10 -> 32 bit, 11 -> 64bit * opc: 00 -> store, 01 -> loadu, 10 -> loads 64, 11 -> loads 32 */ static void disas_ldst_reg_imm9(DisasContext *s, uint32_t insn) { int rt = extract32(insn, 0, 5); int rn = extract32(insn, 5, 5); int imm9 = sextract32(insn, 12, 9); int opc = extract32(insn, 22, 2); int size = extract32(insn, 30, 2); int idx = extract32(insn, 10, 2); bool is_signed = false; bool is_store = false; bool is_extended = false; bool is_vector = extract32(insn, 26, 1); bool post_index; bool writeback; TCGv_i64 tcg_addr; if (is_vector) { size |= (opc & 2) << 1; if (size > 4) { unallocated_encoding(s); return; } is_store = ((opc & 1) == 0); } else { if (size == 3 && opc == 2) { /* PRFM - prefetch */ return; } if (opc == 3 && size > 1) { unallocated_encoding(s); return; } is_store = (opc == 0); is_signed = opc & (1<<1); is_extended = (size < 3) && (opc & 1); } switch (idx) { case 0: post_index = false; writeback = false; break; case 1: post_index = true; writeback = true; break; case 3: post_index = false; writeback = true; break; case 2: g_assert(false); break; } if (rn == 31) { gen_check_sp_alignment(s); } tcg_addr = read_cpu_reg_sp(s, rn, 1); if (!post_index) { tcg_gen_addi_i64(tcg_addr, tcg_addr, imm9); } if (is_vector) { if (is_store) { do_fp_st(s, rt, tcg_addr, size); } else { do_fp_ld(s, rt, tcg_addr, size); } } else { TCGv_i64 tcg_rt = cpu_reg(s, rt); if (is_store) { do_gpr_st(s, tcg_rt, tcg_addr, size); } else { do_gpr_ld(s, tcg_rt, tcg_addr, size, is_signed, is_extended); } } if (writeback) { TCGv_i64 tcg_rn = cpu_reg_sp(s, rn); if (post_index) { tcg_gen_addi_i64(tcg_addr, tcg_addr, imm9); } tcg_gen_mov_i64(tcg_rn, tcg_addr); } } /* * C3.3.10 Load/store (register offset) * * 31 30 29 27 26 25 24 23 22 21 20 16 15 13 12 11 10 9 5 4 0 * +----+-------+---+-----+-----+---+------+-----+--+-----+----+----+ * |size| 1 1 1 | V | 0 0 | opc | 1 | Rm | opt | S| 1 0 | Rn | Rt | * +----+-------+---+-----+-----+---+------+-----+--+-----+----+----+ * * For non-vector: * size: 00-> byte, 01 -> 16 bit, 10 -> 32bit, 11 -> 64bit * opc: 00 -> store, 01 -> loadu, 10 -> loads 64, 11 -> loads 32 * For vector: * size is opc<1>:size<1:0> so 100 -> 128 bit; 110 and 111 unallocated * opc<0>: 0 -> store, 1 -> load * V: 1 -> vector/simd * opt: extend encoding (see DecodeRegExtend) * S: if S=1 then scale (essentially index by sizeof(size)) * Rt: register to transfer into/out of * Rn: address register or SP for base * Rm: offset register or ZR for offset */ static void disas_ldst_reg_roffset(DisasContext *s, uint32_t insn) { int rt = extract32(insn, 0, 5); int rn = extract32(insn, 5, 5); int shift = extract32(insn, 12, 1); int rm = extract32(insn, 16, 5); int opc = extract32(insn, 22, 2); int opt = extract32(insn, 13, 3); int size = extract32(insn, 30, 2); bool is_signed = false; bool is_store = false; bool is_extended = false; bool is_vector = extract32(insn, 26, 1); TCGv_i64 tcg_rm; TCGv_i64 tcg_addr; if (extract32(opt, 1, 1) == 0) { unallocated_encoding(s); return; } if (is_vector) { size |= (opc & 2) << 1; if (size > 4) { unallocated_encoding(s); return; } is_store = !extract32(opc, 0, 1); } else { if (size == 3 && opc == 2) { /* PRFM - prefetch */ return; } if (opc == 3 && size > 1) { unallocated_encoding(s); return; } is_store = (opc == 0); is_signed = extract32(opc, 1, 1); is_extended = (size < 3) && extract32(opc, 0, 1); } if (rn == 31) { gen_check_sp_alignment(s); } tcg_addr = read_cpu_reg_sp(s, rn, 1); tcg_rm = read_cpu_reg(s, rm, 1); ext_and_shift_reg(tcg_rm, tcg_rm, opt, shift ? size : 0); tcg_gen_add_i64(tcg_addr, tcg_addr, tcg_rm); if (is_vector) { if (is_store) { do_fp_st(s, rt, tcg_addr, size); } else { do_fp_ld(s, rt, tcg_addr, size); } } else { TCGv_i64 tcg_rt = cpu_reg(s, rt); if (is_store) { do_gpr_st(s, tcg_rt, tcg_addr, size); } else { do_gpr_ld(s, tcg_rt, tcg_addr, size, is_signed, is_extended); } } } /* * C3.3.13 Load/store (unsigned immediate) * * 31 30 29 27 26 25 24 23 22 21 10 9 5 * +----+-------+---+-----+-----+------------+-------+------+ * |size| 1 1 1 | V | 0 1 | opc | imm12 | Rn | Rt | * +----+-------+---+-----+-----+------------+-------+------+ * * For non-vector: * size: 00-> byte, 01 -> 16 bit, 10 -> 32bit, 11 -> 64bit * opc: 00 -> store, 01 -> loadu, 10 -> loads 64, 11 -> loads 32 * For vector: * size is opc<1>:size<1:0> so 100 -> 128 bit; 110 and 111 unallocated * opc<0>: 0 -> store, 1 -> load * Rn: base address register (inc SP) * Rt: target register */ static void disas_ldst_reg_unsigned_imm(DisasContext *s, uint32_t insn) { int rt = extract32(insn, 0, 5); int rn = extract32(insn, 5, 5); unsigned int imm12 = extract32(insn, 10, 12); bool is_vector = extract32(insn, 26, 1); int size = extract32(insn, 30, 2); int opc = extract32(insn, 22, 2); unsigned int offset; TCGv_i64 tcg_addr; bool is_store; bool is_signed = false; bool is_extended = false; if (is_vector) { size |= (opc & 2) << 1; if (size > 4) { unallocated_encoding(s); return; } is_store = !extract32(opc, 0, 1); } else { if (size == 3 && opc == 2) { /* PRFM - prefetch */ return; } if (opc == 3 && size > 1) { unallocated_encoding(s); return; } is_store = (opc == 0); is_signed = extract32(opc, 1, 1); is_extended = (size < 3) && extract32(opc, 0, 1); } if (rn == 31) { gen_check_sp_alignment(s); } tcg_addr = read_cpu_reg_sp(s, rn, 1); offset = imm12 << size; tcg_gen_addi_i64(tcg_addr, tcg_addr, offset); if (is_vector) { if (is_store) { do_fp_st(s, rt, tcg_addr, size); } else { do_fp_ld(s, rt, tcg_addr, size); } } else { TCGv_i64 tcg_rt = cpu_reg(s, rt); if (is_store) { do_gpr_st(s, tcg_rt, tcg_addr, size); } else { do_gpr_ld(s, tcg_rt, tcg_addr, size, is_signed, is_extended); } } } /* Load/store register (immediate forms) */ static void disas_ldst_reg_imm(DisasContext *s, uint32_t insn) { switch (extract32(insn, 10, 2)) { case 0: case 1: case 3: /* Load/store register (unscaled immediate) */ /* Load/store immediate pre/post-indexed */ disas_ldst_reg_imm9(s, insn); break; case 2: /* Load/store register unprivileged */ unsupported_encoding(s, insn); break; default: unallocated_encoding(s); break; } } /* Load/store register (all forms) */ static void disas_ldst_reg(DisasContext *s, uint32_t insn) { switch (extract32(insn, 24, 2)) { case 0: if (extract32(insn, 21, 1) == 1 && extract32(insn, 10, 2) == 2) { disas_ldst_reg_roffset(s, insn); } else { disas_ldst_reg_imm(s, insn); } break; case 1: disas_ldst_reg_unsigned_imm(s, insn); break; default: unallocated_encoding(s); break; } } /* AdvSIMD load/store multiple structures */ static void disas_ldst_multiple_struct(DisasContext *s, uint32_t insn) { unsupported_encoding(s, insn); } /* AdvSIMD load/store single structure */ static void disas_ldst_single_struct(DisasContext *s, uint32_t insn) { unsupported_encoding(s, insn); } /* C3.3 Loads and stores */ static void disas_ldst(DisasContext *s, uint32_t insn) { switch (extract32(insn, 24, 6)) { case 0x08: /* Load/store exclusive */ disas_ldst_excl(s, insn); break; case 0x18: case 0x1c: /* Load register (literal) */ disas_ld_lit(s, insn); break; case 0x28: case 0x29: case 0x2c: case 0x2d: /* Load/store pair (all forms) */ disas_ldst_pair(s, insn); break; case 0x38: case 0x39: case 0x3c: case 0x3d: /* Load/store register (all forms) */ disas_ldst_reg(s, insn); break; case 0x0c: /* AdvSIMD load/store multiple structures */ disas_ldst_multiple_struct(s, insn); break; case 0x0d: /* AdvSIMD load/store single structure */ disas_ldst_single_struct(s, insn); break; default: unallocated_encoding(s); break; } } /* C3.4.6 PC-rel. addressing * 31 30 29 28 24 23 5 4 0 * +----+-------+-----------+-------------------+------+ * | op | immlo | 1 0 0 0 0 | immhi | Rd | * +----+-------+-----------+-------------------+------+ */ static void disas_pc_rel_adr(DisasContext *s, uint32_t insn) { unsigned int page, rd; uint64_t base; int64_t offset; page = extract32(insn, 31, 1); /* SignExtend(immhi:immlo) -> offset */ offset = ((int64_t)sextract32(insn, 5, 19) << 2) | extract32(insn, 29, 2); rd = extract32(insn, 0, 5); base = s->pc - 4; if (page) { /* ADRP (page based) */ base &= ~0xfff; offset <<= 12; } tcg_gen_movi_i64(cpu_reg(s, rd), base + offset); } /* * C3.4.1 Add/subtract (immediate) * * 31 30 29 28 24 23 22 21 10 9 5 4 0 * +--+--+--+-----------+-----+-------------+-----+-----+ * |sf|op| S| 1 0 0 0 1 |shift| imm12 | Rn | Rd | * +--+--+--+-----------+-----+-------------+-----+-----+ * * sf: 0 -> 32bit, 1 -> 64bit * op: 0 -> add , 1 -> sub * S: 1 -> set flags * shift: 00 -> LSL imm by 0, 01 -> LSL imm by 12 */ static void disas_add_sub_imm(DisasContext *s, uint32_t insn) { int rd = extract32(insn, 0, 5); int rn = extract32(insn, 5, 5); uint64_t imm = extract32(insn, 10, 12); int shift = extract32(insn, 22, 2); bool setflags = extract32(insn, 29, 1); bool sub_op = extract32(insn, 30, 1); bool is_64bit = extract32(insn, 31, 1); TCGv_i64 tcg_rn = cpu_reg_sp(s, rn); TCGv_i64 tcg_rd = setflags ? cpu_reg(s, rd) : cpu_reg_sp(s, rd); TCGv_i64 tcg_result; switch (shift) { case 0x0: break; case 0x1: imm <<= 12; break; default: unallocated_encoding(s); return; } tcg_result = tcg_temp_new_i64(); if (!setflags) { if (sub_op) { tcg_gen_subi_i64(tcg_result, tcg_rn, imm); } else { tcg_gen_addi_i64(tcg_result, tcg_rn, imm); } } else { TCGv_i64 tcg_imm = tcg_const_i64(imm); if (sub_op) { gen_sub_CC(is_64bit, tcg_result, tcg_rn, tcg_imm); } else { gen_add_CC(is_64bit, tcg_result, tcg_rn, tcg_imm); } tcg_temp_free_i64(tcg_imm); } if (is_64bit) { tcg_gen_mov_i64(tcg_rd, tcg_result); } else { tcg_gen_ext32u_i64(tcg_rd, tcg_result); } tcg_temp_free_i64(tcg_result); } /* The input should be a value in the bottom e bits (with higher * bits zero); returns that value replicated into every element * of size e in a 64 bit integer. */ static uint64_t bitfield_replicate(uint64_t mask, unsigned int e) { assert(e != 0); while (e < 64) { mask |= mask << e; e *= 2; } return mask; } /* Return a value with the bottom len bits set (where 0 < len <= 64) */ static inline uint64_t bitmask64(unsigned int length) { assert(length > 0 && length <= 64); return ~0ULL >> (64 - length); } /* Simplified variant of pseudocode DecodeBitMasks() for the case where we * only require the wmask. Returns false if the imms/immr/immn are a reserved * value (ie should cause a guest UNDEF exception), and true if they are * valid, in which case the decoded bit pattern is written to result. */ static bool logic_imm_decode_wmask(uint64_t *result, unsigned int immn, unsigned int imms, unsigned int immr) { uint64_t mask; unsigned e, levels, s, r; int len; assert(immn < 2 && imms < 64 && immr < 64); /* The bit patterns we create here are 64 bit patterns which * are vectors of identical elements of size e = 2, 4, 8, 16, 32 or * 64 bits each. Each element contains the same value: a run * of between 1 and e-1 non-zero bits, rotated within the * element by between 0 and e-1 bits. * * The element size and run length are encoded into immn (1 bit) * and imms (6 bits) as follows: * 64 bit elements: immn = 1, imms = * 32 bit elements: immn = 0, imms = 0 : * 16 bit elements: immn = 0, imms = 10 : * 8 bit elements: immn = 0, imms = 110 : * 4 bit elements: immn = 0, imms = 1110 : * 2 bit elements: immn = 0, imms = 11110 : * Notice that immn = 0, imms = 11111x is the only combination * not covered by one of the above options; this is reserved. * Further, all-ones is a reserved pattern. * * In all cases the rotation is by immr % e (and immr is 6 bits). */ /* First determine the element size */ len = 31 - clz32((immn << 6) | (~imms & 0x3f)); if (len < 1) { /* This is the immn == 0, imms == 0x11111x case */ return false; } e = 1 << len; levels = e - 1; s = imms & levels; r = immr & levels; if (s == levels) { /* mustn't be all-ones. */ return false; } /* Create the value of one element: s+1 set bits rotated * by r within the element (which is e bits wide)... */ mask = bitmask64(s + 1); mask = (mask >> r) | (mask << (e - r)); /* ...then replicate the element over the whole 64 bit value */ mask = bitfield_replicate(mask, e); *result = mask; return true; } /* C3.4.4 Logical (immediate) * 31 30 29 28 23 22 21 16 15 10 9 5 4 0 * +----+-----+-------------+---+------+------+------+------+ * | sf | opc | 1 0 0 1 0 0 | N | immr | imms | Rn | Rd | * +----+-----+-------------+---+------+------+------+------+ */ static void disas_logic_imm(DisasContext *s, uint32_t insn) { unsigned int sf, opc, is_n, immr, imms, rn, rd; TCGv_i64 tcg_rd, tcg_rn; uint64_t wmask; bool is_and = false; sf = extract32(insn, 31, 1); opc = extract32(insn, 29, 2); is_n = extract32(insn, 22, 1); immr = extract32(insn, 16, 6); imms = extract32(insn, 10, 6); rn = extract32(insn, 5, 5); rd = extract32(insn, 0, 5); if (!sf && is_n) { unallocated_encoding(s); return; } if (opc == 0x3) { /* ANDS */ tcg_rd = cpu_reg(s, rd); } else { tcg_rd = cpu_reg_sp(s, rd); } tcg_rn = cpu_reg(s, rn); if (!logic_imm_decode_wmask(&wmask, is_n, imms, immr)) { /* some immediate field values are reserved */ unallocated_encoding(s); return; } if (!sf) { wmask &= 0xffffffff; } switch (opc) { case 0x3: /* ANDS */ case 0x0: /* AND */ tcg_gen_andi_i64(tcg_rd, tcg_rn, wmask); is_and = true; break; case 0x1: /* ORR */ tcg_gen_ori_i64(tcg_rd, tcg_rn, wmask); break; case 0x2: /* EOR */ tcg_gen_xori_i64(tcg_rd, tcg_rn, wmask); break; default: assert(FALSE); /* must handle all above */ break; } if (!sf && !is_and) { /* zero extend final result; we know we can skip this for AND * since the immediate had the high 32 bits clear. */ tcg_gen_ext32u_i64(tcg_rd, tcg_rd); } if (opc == 3) { /* ANDS */ gen_logic_CC(sf, tcg_rd); } } /* * C3.4.5 Move wide (immediate) * * 31 30 29 28 23 22 21 20 5 4 0 * +--+-----+-------------+-----+----------------+------+ * |sf| opc | 1 0 0 1 0 1 | hw | imm16 | Rd | * +--+-----+-------------+-----+----------------+------+ * * sf: 0 -> 32 bit, 1 -> 64 bit * opc: 00 -> N, 10 -> Z, 11 -> K * hw: shift/16 (0,16, and sf only 32, 48) */ static void disas_movw_imm(DisasContext *s, uint32_t insn) { int rd = extract32(insn, 0, 5); uint64_t imm = extract32(insn, 5, 16); int sf = extract32(insn, 31, 1); int opc = extract32(insn, 29, 2); int pos = extract32(insn, 21, 2) << 4; TCGv_i64 tcg_rd = cpu_reg(s, rd); TCGv_i64 tcg_imm; if (!sf && (pos >= 32)) { unallocated_encoding(s); return; } switch (opc) { case 0: /* MOVN */ case 2: /* MOVZ */ imm <<= pos; if (opc == 0) { imm = ~imm; } if (!sf) { imm &= 0xffffffffu; } tcg_gen_movi_i64(tcg_rd, imm); break; case 3: /* MOVK */ tcg_imm = tcg_const_i64(imm); tcg_gen_deposit_i64(tcg_rd, tcg_rd, tcg_imm, pos, 16); tcg_temp_free_i64(tcg_imm); if (!sf) { tcg_gen_ext32u_i64(tcg_rd, tcg_rd); } break; default: unallocated_encoding(s); break; } } /* C3.4.2 Bitfield * 31 30 29 28 23 22 21 16 15 10 9 5 4 0 * +----+-----+-------------+---+------+------+------+------+ * | sf | opc | 1 0 0 1 1 0 | N | immr | imms | Rn | Rd | * +----+-----+-------------+---+------+------+------+------+ */ static void disas_bitfield(DisasContext *s, uint32_t insn) { unsigned int sf, n, opc, ri, si, rn, rd, bitsize, pos, len; TCGv_i64 tcg_rd, tcg_tmp; sf = extract32(insn, 31, 1); opc = extract32(insn, 29, 2); n = extract32(insn, 22, 1); ri = extract32(insn, 16, 6); si = extract32(insn, 10, 6); rn = extract32(insn, 5, 5); rd = extract32(insn, 0, 5); bitsize = sf ? 64 : 32; if (sf != n || ri >= bitsize || si >= bitsize || opc > 2) { unallocated_encoding(s); return; } tcg_rd = cpu_reg(s, rd); tcg_tmp = read_cpu_reg(s, rn, sf); /* OPTME: probably worth recognizing common cases of ext{8,16,32}{u,s} */ if (opc != 1) { /* SBFM or UBFM */ tcg_gen_movi_i64(tcg_rd, 0); } /* do the bit move operation */ if (si >= ri) { /* Wd = Wn */ tcg_gen_shri_i64(tcg_tmp, tcg_tmp, ri); pos = 0; len = (si - ri) + 1; } else { /* Wd<32+s-r,32-r> = Wn */ pos = bitsize - ri; len = si + 1; } tcg_gen_deposit_i64(tcg_rd, tcg_rd, tcg_tmp, pos, len); if (opc == 0) { /* SBFM - sign extend the destination field */ tcg_gen_shli_i64(tcg_rd, tcg_rd, 64 - (pos + len)); tcg_gen_sari_i64(tcg_rd, tcg_rd, 64 - (pos + len)); } if (!sf) { /* zero extend final result */ tcg_gen_ext32u_i64(tcg_rd, tcg_rd); } } /* C3.4.3 Extract * 31 30 29 28 23 22 21 20 16 15 10 9 5 4 0 * +----+------+-------------+---+----+------+--------+------+------+ * | sf | op21 | 1 0 0 1 1 1 | N | o0 | Rm | imms | Rn | Rd | * +----+------+-------------+---+----+------+--------+------+------+ */ static void disas_extract(DisasContext *s, uint32_t insn) { unsigned int sf, n, rm, imm, rn, rd, bitsize, op21, op0; sf = extract32(insn, 31, 1); n = extract32(insn, 22, 1); rm = extract32(insn, 16, 5); imm = extract32(insn, 10, 6); rn = extract32(insn, 5, 5); rd = extract32(insn, 0, 5); op21 = extract32(insn, 29, 2); op0 = extract32(insn, 21, 1); bitsize = sf ? 64 : 32; if (sf != n || op21 || op0 || imm >= bitsize) { unallocated_encoding(s); } else { TCGv_i64 tcg_rd, tcg_rm, tcg_rn; tcg_rd = cpu_reg(s, rd); if (imm) { /* OPTME: we can special case rm==rn as a rotate */ tcg_rm = read_cpu_reg(s, rm, sf); tcg_rn = read_cpu_reg(s, rn, sf); tcg_gen_shri_i64(tcg_rm, tcg_rm, imm); tcg_gen_shli_i64(tcg_rn, tcg_rn, bitsize - imm); tcg_gen_or_i64(tcg_rd, tcg_rm, tcg_rn); if (!sf) { tcg_gen_ext32u_i64(tcg_rd, tcg_rd); } } else { /* tcg shl_i32/shl_i64 is undefined for 32/64 bit shifts, * so an extract from bit 0 is a special case. */ if (sf) { tcg_gen_mov_i64(tcg_rd, cpu_reg(s, rm)); } else { tcg_gen_ext32u_i64(tcg_rd, cpu_reg(s, rm)); } } } } /* C3.4 Data processing - immediate */ static void disas_data_proc_imm(DisasContext *s, uint32_t insn) { switch (extract32(insn, 23, 6)) { case 0x20: case 0x21: /* PC-rel. addressing */ disas_pc_rel_adr(s, insn); break; case 0x22: case 0x23: /* Add/subtract (immediate) */ disas_add_sub_imm(s, insn); break; case 0x24: /* Logical (immediate) */ disas_logic_imm(s, insn); break; case 0x25: /* Move wide (immediate) */ disas_movw_imm(s, insn); break; case 0x26: /* Bitfield */ disas_bitfield(s, insn); break; case 0x27: /* Extract */ disas_extract(s, insn); break; default: unallocated_encoding(s); break; } } /* Shift a TCGv src by TCGv shift_amount, put result in dst. * Note that it is the caller's responsibility to ensure that the * shift amount is in range (ie 0..31 or 0..63) and provide the ARM * mandated semantics for out of range shifts. */ static void shift_reg(TCGv_i64 dst, TCGv_i64 src, int sf, enum a64_shift_type shift_type, TCGv_i64 shift_amount) { switch (shift_type) { case A64_SHIFT_TYPE_LSL: tcg_gen_shl_i64(dst, src, shift_amount); break; case A64_SHIFT_TYPE_LSR: tcg_gen_shr_i64(dst, src, shift_amount); break; case A64_SHIFT_TYPE_ASR: if (!sf) { tcg_gen_ext32s_i64(dst, src); } tcg_gen_sar_i64(dst, sf ? src : dst, shift_amount); break; case A64_SHIFT_TYPE_ROR: if (sf) { tcg_gen_rotr_i64(dst, src, shift_amount); } else { TCGv_i32 t0, t1; t0 = tcg_temp_new_i32(); t1 = tcg_temp_new_i32(); tcg_gen_trunc_i64_i32(t0, src); tcg_gen_trunc_i64_i32(t1, shift_amount); tcg_gen_rotr_i32(t0, t0, t1); tcg_gen_extu_i32_i64(dst, t0); tcg_temp_free_i32(t0); tcg_temp_free_i32(t1); } break; default: assert(FALSE); /* all shift types should be handled */ break; } if (!sf) { /* zero extend final result */ tcg_gen_ext32u_i64(dst, dst); } } /* Shift a TCGv src by immediate, put result in dst. * The shift amount must be in range (this should always be true as the * relevant instructions will UNDEF on bad shift immediates). */ static void shift_reg_imm(TCGv_i64 dst, TCGv_i64 src, int sf, enum a64_shift_type shift_type, unsigned int shift_i) { assert(shift_i < (sf ? 64 : 32)); if (shift_i == 0) { tcg_gen_mov_i64(dst, src); } else { TCGv_i64 shift_const; shift_const = tcg_const_i64(shift_i); shift_reg(dst, src, sf, shift_type, shift_const); tcg_temp_free_i64(shift_const); } } /* C3.5.10 Logical (shifted register) * 31 30 29 28 24 23 22 21 20 16 15 10 9 5 4 0 * +----+-----+-----------+-------+---+------+--------+------+------+ * | sf | opc | 0 1 0 1 0 | shift | N | Rm | imm6 | Rn | Rd | * +----+-----+-----------+-------+---+------+--------+------+------+ */ static void disas_logic_reg(DisasContext *s, uint32_t insn) { TCGv_i64 tcg_rd, tcg_rn, tcg_rm; unsigned int sf, opc, shift_type, invert, rm, shift_amount, rn, rd; sf = extract32(insn, 31, 1); opc = extract32(insn, 29, 2); shift_type = extract32(insn, 22, 2); invert = extract32(insn, 21, 1); rm = extract32(insn, 16, 5); shift_amount = extract32(insn, 10, 6); rn = extract32(insn, 5, 5); rd = extract32(insn, 0, 5); if (!sf && (shift_amount & (1 << 5))) { unallocated_encoding(s); return; } tcg_rd = cpu_reg(s, rd); if (opc == 1 && shift_amount == 0 && shift_type == 0 && rn == 31) { /* Unshifted ORR and ORN with WZR/XZR is the standard encoding for * register-register MOV and MVN, so it is worth special casing. */ tcg_rm = cpu_reg(s, rm); if (invert) { tcg_gen_not_i64(tcg_rd, tcg_rm); if (!sf) { tcg_gen_ext32u_i64(tcg_rd, tcg_rd); } } else { if (sf) { tcg_gen_mov_i64(tcg_rd, tcg_rm); } else { tcg_gen_ext32u_i64(tcg_rd, tcg_rm); } } return; } tcg_rm = read_cpu_reg(s, rm, sf); if (shift_amount) { shift_reg_imm(tcg_rm, tcg_rm, sf, shift_type, shift_amount); } tcg_rn = cpu_reg(s, rn); switch (opc | (invert << 2)) { case 0: /* AND */ case 3: /* ANDS */ tcg_gen_and_i64(tcg_rd, tcg_rn, tcg_rm); break; case 1: /* ORR */ tcg_gen_or_i64(tcg_rd, tcg_rn, tcg_rm); break; case 2: /* EOR */ tcg_gen_xor_i64(tcg_rd, tcg_rn, tcg_rm); break; case 4: /* BIC */ case 7: /* BICS */ tcg_gen_andc_i64(tcg_rd, tcg_rn, tcg_rm); break; case 5: /* ORN */ tcg_gen_orc_i64(tcg_rd, tcg_rn, tcg_rm); break; case 6: /* EON */ tcg_gen_eqv_i64(tcg_rd, tcg_rn, tcg_rm); break; default: assert(FALSE); break; } if (!sf) { tcg_gen_ext32u_i64(tcg_rd, tcg_rd); } if (opc == 3) { gen_logic_CC(sf, tcg_rd); } } /* * C3.5.1 Add/subtract (extended register) * * 31|30|29|28 24|23 22|21|20 16|15 13|12 10|9 5|4 0| * +--+--+--+-----------+-----+--+-------+------+------+----+----+ * |sf|op| S| 0 1 0 1 1 | opt | 1| Rm |option| imm3 | Rn | Rd | * +--+--+--+-----------+-----+--+-------+------+------+----+----+ * * sf: 0 -> 32bit, 1 -> 64bit * op: 0 -> add , 1 -> sub * S: 1 -> set flags * opt: 00 * option: extension type (see DecodeRegExtend) * imm3: optional shift to Rm * * Rd = Rn + LSL(extend(Rm), amount) */ static void disas_add_sub_ext_reg(DisasContext *s, uint32_t insn) { int rd = extract32(insn, 0, 5); int rn = extract32(insn, 5, 5); int imm3 = extract32(insn, 10, 3); int option = extract32(insn, 13, 3); int rm = extract32(insn, 16, 5); bool setflags = extract32(insn, 29, 1); bool sub_op = extract32(insn, 30, 1); bool sf = extract32(insn, 31, 1); TCGv_i64 tcg_rm, tcg_rn; /* temps */ TCGv_i64 tcg_rd; TCGv_i64 tcg_result; if (imm3 > 4) { unallocated_encoding(s); return; } /* non-flag setting ops may use SP */ if (!setflags) { tcg_rn = read_cpu_reg_sp(s, rn, sf); tcg_rd = cpu_reg_sp(s, rd); } else { tcg_rn = read_cpu_reg(s, rn, sf); tcg_rd = cpu_reg(s, rd); } tcg_rm = read_cpu_reg(s, rm, sf); ext_and_shift_reg(tcg_rm, tcg_rm, option, imm3); tcg_result = tcg_temp_new_i64(); if (!setflags) { if (sub_op) { tcg_gen_sub_i64(tcg_result, tcg_rn, tcg_rm); } else { tcg_gen_add_i64(tcg_result, tcg_rn, tcg_rm); } } else { if (sub_op) { gen_sub_CC(sf, tcg_result, tcg_rn, tcg_rm); } else { gen_add_CC(sf, tcg_result, tcg_rn, tcg_rm); } } if (sf) { tcg_gen_mov_i64(tcg_rd, tcg_result); } else { tcg_gen_ext32u_i64(tcg_rd, tcg_result); } tcg_temp_free_i64(tcg_result); } /* * C3.5.2 Add/subtract (shifted register) * * 31 30 29 28 24 23 22 21 20 16 15 10 9 5 4 0 * +--+--+--+-----------+-----+--+-------+---------+------+------+ * |sf|op| S| 0 1 0 1 1 |shift| 0| Rm | imm6 | Rn | Rd | * +--+--+--+-----------+-----+--+-------+---------+------+------+ * * sf: 0 -> 32bit, 1 -> 64bit * op: 0 -> add , 1 -> sub * S: 1 -> set flags * shift: 00 -> LSL, 01 -> LSR, 10 -> ASR, 11 -> RESERVED * imm6: Shift amount to apply to Rm before the add/sub */ static void disas_add_sub_reg(DisasContext *s, uint32_t insn) { int rd = extract32(insn, 0, 5); int rn = extract32(insn, 5, 5); int imm6 = extract32(insn, 10, 6); int rm = extract32(insn, 16, 5); int shift_type = extract32(insn, 22, 2); bool setflags = extract32(insn, 29, 1); bool sub_op = extract32(insn, 30, 1); bool sf = extract32(insn, 31, 1); TCGv_i64 tcg_rd = cpu_reg(s, rd); TCGv_i64 tcg_rn, tcg_rm; TCGv_i64 tcg_result; if ((shift_type == 3) || (!sf && (imm6 > 31))) { unallocated_encoding(s); return; } tcg_rn = read_cpu_reg(s, rn, sf); tcg_rm = read_cpu_reg(s, rm, sf); shift_reg_imm(tcg_rm, tcg_rm, sf, shift_type, imm6); tcg_result = tcg_temp_new_i64(); if (!setflags) { if (sub_op) { tcg_gen_sub_i64(tcg_result, tcg_rn, tcg_rm); } else { tcg_gen_add_i64(tcg_result, tcg_rn, tcg_rm); } } else { if (sub_op) { gen_sub_CC(sf, tcg_result, tcg_rn, tcg_rm); } else { gen_add_CC(sf, tcg_result, tcg_rn, tcg_rm); } } if (sf) { tcg_gen_mov_i64(tcg_rd, tcg_result); } else { tcg_gen_ext32u_i64(tcg_rd, tcg_result); } tcg_temp_free_i64(tcg_result); } /* C3.5.9 Data-processing (3 source) 31 30 29 28 24 23 21 20 16 15 14 10 9 5 4 0 +--+------+-----------+------+------+----+------+------+------+ |sf| op54 | 1 1 0 1 1 | op31 | Rm | o0 | Ra | Rn | Rd | +--+------+-----------+------+------+----+------+------+------+ */ static void disas_data_proc_3src(DisasContext *s, uint32_t insn) { int rd = extract32(insn, 0, 5); int rn = extract32(insn, 5, 5); int ra = extract32(insn, 10, 5); int rm = extract32(insn, 16, 5); int op_id = (extract32(insn, 29, 3) << 4) | (extract32(insn, 21, 3) << 1) | extract32(insn, 15, 1); bool sf = extract32(insn, 31, 1); bool is_sub = extract32(op_id, 0, 1); bool is_high = extract32(op_id, 2, 1); bool is_signed = false; TCGv_i64 tcg_op1; TCGv_i64 tcg_op2; TCGv_i64 tcg_tmp; /* Note that op_id is sf:op54:op31:o0 so it includes the 32/64 size flag */ switch (op_id) { case 0x42: /* SMADDL */ case 0x43: /* SMSUBL */ case 0x44: /* SMULH */ is_signed = true; break; case 0x0: /* MADD (32bit) */ case 0x1: /* MSUB (32bit) */ case 0x40: /* MADD (64bit) */ case 0x41: /* MSUB (64bit) */ case 0x4a: /* UMADDL */ case 0x4b: /* UMSUBL */ case 0x4c: /* UMULH */ break; default: unallocated_encoding(s); return; } if (is_high) { TCGv_i64 low_bits = tcg_temp_new_i64(); /* low bits discarded */ TCGv_i64 tcg_rd = cpu_reg(s, rd); TCGv_i64 tcg_rn = cpu_reg(s, rn); TCGv_i64 tcg_rm = cpu_reg(s, rm); if (is_signed) { tcg_gen_muls2_i64(low_bits, tcg_rd, tcg_rn, tcg_rm); } else { tcg_gen_mulu2_i64(low_bits, tcg_rd, tcg_rn, tcg_rm); } tcg_temp_free_i64(low_bits); return; } tcg_op1 = tcg_temp_new_i64(); tcg_op2 = tcg_temp_new_i64(); tcg_tmp = tcg_temp_new_i64(); if (op_id < 0x42) { tcg_gen_mov_i64(tcg_op1, cpu_reg(s, rn)); tcg_gen_mov_i64(tcg_op2, cpu_reg(s, rm)); } else { if (is_signed) { tcg_gen_ext32s_i64(tcg_op1, cpu_reg(s, rn)); tcg_gen_ext32s_i64(tcg_op2, cpu_reg(s, rm)); } else { tcg_gen_ext32u_i64(tcg_op1, cpu_reg(s, rn)); tcg_gen_ext32u_i64(tcg_op2, cpu_reg(s, rm)); } } if (ra == 31 && !is_sub) { /* Special-case MADD with rA == XZR; it is the standard MUL alias */ tcg_gen_mul_i64(cpu_reg(s, rd), tcg_op1, tcg_op2); } else { tcg_gen_mul_i64(tcg_tmp, tcg_op1, tcg_op2); if (is_sub) { tcg_gen_sub_i64(cpu_reg(s, rd), cpu_reg(s, ra), tcg_tmp); } else { tcg_gen_add_i64(cpu_reg(s, rd), cpu_reg(s, ra), tcg_tmp); } } if (!sf) { tcg_gen_ext32u_i64(cpu_reg(s, rd), cpu_reg(s, rd)); } tcg_temp_free_i64(tcg_op1); tcg_temp_free_i64(tcg_op2); tcg_temp_free_i64(tcg_tmp); } /* C3.5.3 - Add/subtract (with carry) * 31 30 29 28 27 26 25 24 23 22 21 20 16 15 10 9 5 4 0 * +--+--+--+------------------------+------+---------+------+-----+ * |sf|op| S| 1 1 0 1 0 0 0 0 | rm | opcode2 | Rn | Rd | * +--+--+--+------------------------+------+---------+------+-----+ * [000000] */ static void disas_adc_sbc(DisasContext *s, uint32_t insn) { unsigned int sf, op, setflags, rm, rn, rd; TCGv_i64 tcg_y, tcg_rn, tcg_rd; if (extract32(insn, 10, 6) != 0) { unallocated_encoding(s); return; } sf = extract32(insn, 31, 1); op = extract32(insn, 30, 1); setflags = extract32(insn, 29, 1); rm = extract32(insn, 16, 5); rn = extract32(insn, 5, 5); rd = extract32(insn, 0, 5); tcg_rd = cpu_reg(s, rd); tcg_rn = cpu_reg(s, rn); if (op) { tcg_y = new_tmp_a64(s); tcg_gen_not_i64(tcg_y, cpu_reg(s, rm)); } else { tcg_y = cpu_reg(s, rm); } if (setflags) { gen_adc_CC(sf, tcg_rd, tcg_rn, tcg_y); } else { gen_adc(sf, tcg_rd, tcg_rn, tcg_y); } } /* C3.5.4 - C3.5.5 Conditional compare (immediate / register) * 31 30 29 28 27 26 25 24 23 22 21 20 16 15 12 11 10 9 5 4 3 0 * +--+--+--+------------------------+--------+------+----+--+------+--+-----+ * |sf|op| S| 1 1 0 1 0 0 1 0 |imm5/rm | cond |i/r |o2| Rn |o3|nzcv | * +--+--+--+------------------------+--------+------+----+--+------+--+-----+ * [1] y [0] [0] */ static void disas_cc(DisasContext *s, uint32_t insn) { unsigned int sf, op, y, cond, rn, nzcv, is_imm; int label_continue = -1; TCGv_i64 tcg_tmp, tcg_y, tcg_rn; if (!extract32(insn, 29, 1)) { unallocated_encoding(s); return; } if (insn & (1 << 10 | 1 << 4)) { unallocated_encoding(s); return; } sf = extract32(insn, 31, 1); op = extract32(insn, 30, 1); is_imm = extract32(insn, 11, 1); y = extract32(insn, 16, 5); /* y = rm (reg) or imm5 (imm) */ cond = extract32(insn, 12, 4); rn = extract32(insn, 5, 5); nzcv = extract32(insn, 0, 4); if (cond < 0x0e) { /* not always */ int label_match = gen_new_label(); label_continue = gen_new_label(); arm_gen_test_cc(cond, label_match); /* nomatch: */ tcg_tmp = tcg_temp_new_i64(); tcg_gen_movi_i64(tcg_tmp, nzcv << 28); gen_set_nzcv(tcg_tmp); tcg_temp_free_i64(tcg_tmp); tcg_gen_br(label_continue); gen_set_label(label_match); } /* match, or condition is always */ if (is_imm) { tcg_y = new_tmp_a64(s); tcg_gen_movi_i64(tcg_y, y); } else { tcg_y = cpu_reg(s, y); } tcg_rn = cpu_reg(s, rn); tcg_tmp = tcg_temp_new_i64(); if (op) { gen_sub_CC(sf, tcg_tmp, tcg_rn, tcg_y); } else { gen_add_CC(sf, tcg_tmp, tcg_rn, tcg_y); } tcg_temp_free_i64(tcg_tmp); if (cond < 0x0e) { /* continue */ gen_set_label(label_continue); } } /* C3.5.6 Conditional select * 31 30 29 28 21 20 16 15 12 11 10 9 5 4 0 * +----+----+---+-----------------+------+------+-----+------+------+ * | sf | op | S | 1 1 0 1 0 1 0 0 | Rm | cond | op2 | Rn | Rd | * +----+----+---+-----------------+------+------+-----+------+------+ */ static void disas_cond_select(DisasContext *s, uint32_t insn) { unsigned int sf, else_inv, rm, cond, else_inc, rn, rd; TCGv_i64 tcg_rd, tcg_src; if (extract32(insn, 29, 1) || extract32(insn, 11, 1)) { /* S == 1 or op2<1> == 1 */ unallocated_encoding(s); return; } sf = extract32(insn, 31, 1); else_inv = extract32(insn, 30, 1); rm = extract32(insn, 16, 5); cond = extract32(insn, 12, 4); else_inc = extract32(insn, 10, 1); rn = extract32(insn, 5, 5); rd = extract32(insn, 0, 5); if (rd == 31) { /* silly no-op write; until we use movcond we must special-case * this to avoid a dead temporary across basic blocks. */ return; } tcg_rd = cpu_reg(s, rd); if (cond >= 0x0e) { /* condition "always" */ tcg_src = read_cpu_reg(s, rn, sf); tcg_gen_mov_i64(tcg_rd, tcg_src); } else { /* OPTME: we could use movcond here, at the cost of duplicating * a lot of the arm_gen_test_cc() logic. */ int label_match = gen_new_label(); int label_continue = gen_new_label(); arm_gen_test_cc(cond, label_match); /* nomatch: */ tcg_src = cpu_reg(s, rm); if (else_inv && else_inc) { tcg_gen_neg_i64(tcg_rd, tcg_src); } else if (else_inv) { tcg_gen_not_i64(tcg_rd, tcg_src); } else if (else_inc) { tcg_gen_addi_i64(tcg_rd, tcg_src, 1); } else { tcg_gen_mov_i64(tcg_rd, tcg_src); } if (!sf) { tcg_gen_ext32u_i64(tcg_rd, tcg_rd); } tcg_gen_br(label_continue); /* match: */ gen_set_label(label_match); tcg_src = read_cpu_reg(s, rn, sf); tcg_gen_mov_i64(tcg_rd, tcg_src); /* continue: */ gen_set_label(label_continue); } } static void handle_clz(DisasContext *s, unsigned int sf, unsigned int rn, unsigned int rd) { TCGv_i64 tcg_rd, tcg_rn; tcg_rd = cpu_reg(s, rd); tcg_rn = cpu_reg(s, rn); if (sf) { gen_helper_clz64(tcg_rd, tcg_rn); } else { TCGv_i32 tcg_tmp32 = tcg_temp_new_i32(); tcg_gen_trunc_i64_i32(tcg_tmp32, tcg_rn); gen_helper_clz(tcg_tmp32, tcg_tmp32); tcg_gen_extu_i32_i64(tcg_rd, tcg_tmp32); tcg_temp_free_i32(tcg_tmp32); } } static void handle_cls(DisasContext *s, unsigned int sf, unsigned int rn, unsigned int rd) { TCGv_i64 tcg_rd, tcg_rn; tcg_rd = cpu_reg(s, rd); tcg_rn = cpu_reg(s, rn); if (sf) { gen_helper_cls64(tcg_rd, tcg_rn); } else { TCGv_i32 tcg_tmp32 = tcg_temp_new_i32(); tcg_gen_trunc_i64_i32(tcg_tmp32, tcg_rn); gen_helper_cls32(tcg_tmp32, tcg_tmp32); tcg_gen_extu_i32_i64(tcg_rd, tcg_tmp32); tcg_temp_free_i32(tcg_tmp32); } } static void handle_rbit(DisasContext *s, unsigned int sf, unsigned int rn, unsigned int rd) { TCGv_i64 tcg_rd, tcg_rn; tcg_rd = cpu_reg(s, rd); tcg_rn = cpu_reg(s, rn); if (sf) { gen_helper_rbit64(tcg_rd, tcg_rn); } else { TCGv_i32 tcg_tmp32 = tcg_temp_new_i32(); tcg_gen_trunc_i64_i32(tcg_tmp32, tcg_rn); gen_helper_rbit(tcg_tmp32, tcg_tmp32); tcg_gen_extu_i32_i64(tcg_rd, tcg_tmp32); tcg_temp_free_i32(tcg_tmp32); } } /* C5.6.149 REV with sf==1, opcode==3 ("REV64") */ static void handle_rev64(DisasContext *s, unsigned int sf, unsigned int rn, unsigned int rd) { if (!sf) { unallocated_encoding(s); return; } tcg_gen_bswap64_i64(cpu_reg(s, rd), cpu_reg(s, rn)); } /* C5.6.149 REV with sf==0, opcode==2 * C5.6.151 REV32 (sf==1, opcode==2) */ static void handle_rev32(DisasContext *s, unsigned int sf, unsigned int rn, unsigned int rd) { TCGv_i64 tcg_rd = cpu_reg(s, rd); if (sf) { TCGv_i64 tcg_tmp = tcg_temp_new_i64(); TCGv_i64 tcg_rn = read_cpu_reg(s, rn, sf); /* bswap32_i64 requires zero high word */ tcg_gen_ext32u_i64(tcg_tmp, tcg_rn); tcg_gen_bswap32_i64(tcg_rd, tcg_tmp); tcg_gen_shri_i64(tcg_tmp, tcg_rn, 32); tcg_gen_bswap32_i64(tcg_tmp, tcg_tmp); tcg_gen_concat32_i64(tcg_rd, tcg_rd, tcg_tmp); tcg_temp_free_i64(tcg_tmp); } else { tcg_gen_ext32u_i64(tcg_rd, cpu_reg(s, rn)); tcg_gen_bswap32_i64(tcg_rd, tcg_rd); } } /* C5.6.150 REV16 (opcode==1) */ static void handle_rev16(DisasContext *s, unsigned int sf, unsigned int rn, unsigned int rd) { TCGv_i64 tcg_rd = cpu_reg(s, rd); TCGv_i64 tcg_tmp = tcg_temp_new_i64(); TCGv_i64 tcg_rn = read_cpu_reg(s, rn, sf); tcg_gen_andi_i64(tcg_tmp, tcg_rn, 0xffff); tcg_gen_bswap16_i64(tcg_rd, tcg_tmp); tcg_gen_shri_i64(tcg_tmp, tcg_rn, 16); tcg_gen_andi_i64(tcg_tmp, tcg_tmp, 0xffff); tcg_gen_bswap16_i64(tcg_tmp, tcg_tmp); tcg_gen_deposit_i64(tcg_rd, tcg_rd, tcg_tmp, 16, 16); if (sf) { tcg_gen_shri_i64(tcg_tmp, tcg_rn, 32); tcg_gen_andi_i64(tcg_tmp, tcg_tmp, 0xffff); tcg_gen_bswap16_i64(tcg_tmp, tcg_tmp); tcg_gen_deposit_i64(tcg_rd, tcg_rd, tcg_tmp, 32, 16); tcg_gen_shri_i64(tcg_tmp, tcg_rn, 48); tcg_gen_bswap16_i64(tcg_tmp, tcg_tmp); tcg_gen_deposit_i64(tcg_rd, tcg_rd, tcg_tmp, 48, 16); } tcg_temp_free_i64(tcg_tmp); } /* C3.5.7 Data-processing (1 source) * 31 30 29 28 21 20 16 15 10 9 5 4 0 * +----+---+---+-----------------+---------+--------+------+------+ * | sf | 1 | S | 1 1 0 1 0 1 1 0 | opcode2 | opcode | Rn | Rd | * +----+---+---+-----------------+---------+--------+------+------+ */ static void disas_data_proc_1src(DisasContext *s, uint32_t insn) { unsigned int sf, opcode, rn, rd; if (extract32(insn, 29, 1) || extract32(insn, 16, 5)) { unallocated_encoding(s); return; } sf = extract32(insn, 31, 1); opcode = extract32(insn, 10, 6); rn = extract32(insn, 5, 5); rd = extract32(insn, 0, 5); switch (opcode) { case 0: /* RBIT */ handle_rbit(s, sf, rn, rd); break; case 1: /* REV16 */ handle_rev16(s, sf, rn, rd); break; case 2: /* REV32 */ handle_rev32(s, sf, rn, rd); break; case 3: /* REV64 */ handle_rev64(s, sf, rn, rd); break; case 4: /* CLZ */ handle_clz(s, sf, rn, rd); break; case 5: /* CLS */ handle_cls(s, sf, rn, rd); break; } } static void handle_div(DisasContext *s, bool is_signed, unsigned int sf, unsigned int rm, unsigned int rn, unsigned int rd) { TCGv_i64 tcg_n, tcg_m, tcg_rd; tcg_rd = cpu_reg(s, rd); if (!sf && is_signed) { tcg_n = new_tmp_a64(s); tcg_m = new_tmp_a64(s); tcg_gen_ext32s_i64(tcg_n, cpu_reg(s, rn)); tcg_gen_ext32s_i64(tcg_m, cpu_reg(s, rm)); } else { tcg_n = read_cpu_reg(s, rn, sf); tcg_m = read_cpu_reg(s, rm, sf); } if (is_signed) { gen_helper_sdiv64(tcg_rd, tcg_n, tcg_m); } else { gen_helper_udiv64(tcg_rd, tcg_n, tcg_m); } if (!sf) { /* zero extend final result */ tcg_gen_ext32u_i64(tcg_rd, tcg_rd); } } /* C5.6.115 LSLV, C5.6.118 LSRV, C5.6.17 ASRV, C5.6.154 RORV */ static void handle_shift_reg(DisasContext *s, enum a64_shift_type shift_type, unsigned int sf, unsigned int rm, unsigned int rn, unsigned int rd) { TCGv_i64 tcg_shift = tcg_temp_new_i64(); TCGv_i64 tcg_rd = cpu_reg(s, rd); TCGv_i64 tcg_rn = read_cpu_reg(s, rn, sf); tcg_gen_andi_i64(tcg_shift, cpu_reg(s, rm), sf ? 63 : 31); shift_reg(tcg_rd, tcg_rn, sf, shift_type, tcg_shift); tcg_temp_free_i64(tcg_shift); } /* C3.5.8 Data-processing (2 source) * 31 30 29 28 21 20 16 15 10 9 5 4 0 * +----+---+---+-----------------+------+--------+------+------+ * | sf | 0 | S | 1 1 0 1 0 1 1 0 | Rm | opcode | Rn | Rd | * +----+---+---+-----------------+------+--------+------+------+ */ static void disas_data_proc_2src(DisasContext *s, uint32_t insn) { unsigned int sf, rm, opcode, rn, rd; sf = extract32(insn, 31, 1); rm = extract32(insn, 16, 5); opcode = extract32(insn, 10, 6); rn = extract32(insn, 5, 5); rd = extract32(insn, 0, 5); if (extract32(insn, 29, 1)) { unallocated_encoding(s); return; } switch (opcode) { case 2: /* UDIV */ handle_div(s, false, sf, rm, rn, rd); break; case 3: /* SDIV */ handle_div(s, true, sf, rm, rn, rd); break; case 8: /* LSLV */ handle_shift_reg(s, A64_SHIFT_TYPE_LSL, sf, rm, rn, rd); break; case 9: /* LSRV */ handle_shift_reg(s, A64_SHIFT_TYPE_LSR, sf, rm, rn, rd); break; case 10: /* ASRV */ handle_shift_reg(s, A64_SHIFT_TYPE_ASR, sf, rm, rn, rd); break; case 11: /* RORV */ handle_shift_reg(s, A64_SHIFT_TYPE_ROR, sf, rm, rn, rd); break; case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23: /* CRC32 */ unsupported_encoding(s, insn); break; default: unallocated_encoding(s); break; } } /* C3.5 Data processing - register */ static void disas_data_proc_reg(DisasContext *s, uint32_t insn) { switch (extract32(insn, 24, 5)) { case 0x0a: /* Logical (shifted register) */ disas_logic_reg(s, insn); break; case 0x0b: /* Add/subtract */ if (insn & (1 << 21)) { /* (extended register) */ disas_add_sub_ext_reg(s, insn); } else { disas_add_sub_reg(s, insn); } break; case 0x1b: /* Data-processing (3 source) */ disas_data_proc_3src(s, insn); break; case 0x1a: switch (extract32(insn, 21, 3)) { case 0x0: /* Add/subtract (with carry) */ disas_adc_sbc(s, insn); break; case 0x2: /* Conditional compare */ disas_cc(s, insn); /* both imm and reg forms */ break; case 0x4: /* Conditional select */ disas_cond_select(s, insn); break; case 0x6: /* Data-processing */ if (insn & (1 << 30)) { /* (1 source) */ disas_data_proc_1src(s, insn); } else { /* (2 source) */ disas_data_proc_2src(s, insn); } break; default: unallocated_encoding(s); break; } break; default: unallocated_encoding(s); break; } } static void handle_fp_compare(DisasContext *s, bool is_double, unsigned int rn, unsigned int rm, bool cmp_with_zero, bool signal_all_nans) { TCGv_i64 tcg_flags = tcg_temp_new_i64(); TCGv_ptr fpst = get_fpstatus_ptr(); if (is_double) { TCGv_i64 tcg_vn, tcg_vm; tcg_vn = read_fp_dreg(s, rn); if (cmp_with_zero) { tcg_vm = tcg_const_i64(0); } else { tcg_vm = read_fp_dreg(s, rm); } if (signal_all_nans) { gen_helper_vfp_cmped_a64(tcg_flags, tcg_vn, tcg_vm, fpst); } else { gen_helper_vfp_cmpd_a64(tcg_flags, tcg_vn, tcg_vm, fpst); } tcg_temp_free_i64(tcg_vn); tcg_temp_free_i64(tcg_vm); } else { TCGv_i32 tcg_vn, tcg_vm; tcg_vn = read_fp_sreg(s, rn); if (cmp_with_zero) { tcg_vm = tcg_const_i32(0); } else { tcg_vm = read_fp_sreg(s, rm); } if (signal_all_nans) { gen_helper_vfp_cmpes_a64(tcg_flags, tcg_vn, tcg_vm, fpst); } else { gen_helper_vfp_cmps_a64(tcg_flags, tcg_vn, tcg_vm, fpst); } tcg_temp_free_i32(tcg_vn); tcg_temp_free_i32(tcg_vm); } tcg_temp_free_ptr(fpst); gen_set_nzcv(tcg_flags); tcg_temp_free_i64(tcg_flags); } /* C3.6.22 Floating point compare * 31 30 29 28 24 23 22 21 20 16 15 14 13 10 9 5 4 0 * +---+---+---+-----------+------+---+------+-----+---------+------+-------+ * | M | 0 | S | 1 1 1 1 0 | type | 1 | Rm | op | 1 0 0 0 | Rn | op2 | * +---+---+---+-----------+------+---+------+-----+---------+------+-------+ */ static void disas_fp_compare(DisasContext *s, uint32_t insn) { unsigned int mos, type, rm, op, rn, opc, op2r; mos = extract32(insn, 29, 3); type = extract32(insn, 22, 2); /* 0 = single, 1 = double */ rm = extract32(insn, 16, 5); op = extract32(insn, 14, 2); rn = extract32(insn, 5, 5); opc = extract32(insn, 3, 2); op2r = extract32(insn, 0, 3); if (mos || op || op2r || type > 1) { unallocated_encoding(s); return; } handle_fp_compare(s, type, rn, rm, opc & 1, opc & 2); } /* C3.6.23 Floating point conditional compare * 31 30 29 28 24 23 22 21 20 16 15 12 11 10 9 5 4 3 0 * +---+---+---+-----------+------+---+------+------+-----+------+----+------+ * | M | 0 | S | 1 1 1 1 0 | type | 1 | Rm | cond | 0 1 | Rn | op | nzcv | * +---+---+---+-----------+------+---+------+------+-----+------+----+------+ */ static void disas_fp_ccomp(DisasContext *s, uint32_t insn) { unsigned int mos, type, rm, cond, rn, op, nzcv; TCGv_i64 tcg_flags; int label_continue = -1; mos = extract32(insn, 29, 3); type = extract32(insn, 22, 2); /* 0 = single, 1 = double */ rm = extract32(insn, 16, 5); cond = extract32(insn, 12, 4); rn = extract32(insn, 5, 5); op = extract32(insn, 4, 1); nzcv = extract32(insn, 0, 4); if (mos || type > 1) { unallocated_encoding(s); return; } if (cond < 0x0e) { /* not always */ int label_match = gen_new_label(); label_continue = gen_new_label(); arm_gen_test_cc(cond, label_match); /* nomatch: */ tcg_flags = tcg_const_i64(nzcv << 28); gen_set_nzcv(tcg_flags); tcg_temp_free_i64(tcg_flags); tcg_gen_br(label_continue); gen_set_label(label_match); } handle_fp_compare(s, type, rn, rm, false, op); if (cond < 0x0e) { gen_set_label(label_continue); } } /* C3.6.24 Floating point conditional select * 31 30 29 28 24 23 22 21 20 16 15 12 11 10 9 5 4 0 * +---+---+---+-----------+------+---+------+------+-----+------+------+ * | M | 0 | S | 1 1 1 1 0 | type | 1 | Rm | cond | 1 1 | Rn | Rd | * +---+---+---+-----------+------+---+------+------+-----+------+------+ */ static void disas_fp_csel(DisasContext *s, uint32_t insn) { unsupported_encoding(s, insn); } /* C3.6.25 Floating point data-processing (1 source) * 31 30 29 28 24 23 22 21 20 15 14 10 9 5 4 0 * +---+---+---+-----------+------+---+--------+-----------+------+------+ * | M | 0 | S | 1 1 1 1 0 | type | 1 | opcode | 1 0 0 0 0 | Rn | Rd | * +---+---+---+-----------+------+---+--------+-----------+------+------+ */ static void disas_fp_1src(DisasContext *s, uint32_t insn) { unsupported_encoding(s, insn); } /* C3.6.26 Floating-point data-processing (2 source) - single precision */ static void handle_fp_2src_single(DisasContext *s, int opcode, int rd, int rn, int rm) { TCGv_i32 tcg_op1; TCGv_i32 tcg_op2; TCGv_i32 tcg_res; TCGv_ptr fpst; tcg_res = tcg_temp_new_i32(); fpst = get_fpstatus_ptr(); tcg_op1 = read_fp_sreg(s, rn); tcg_op2 = read_fp_sreg(s, rm); switch (opcode) { case 0x0: /* FMUL */ gen_helper_vfp_muls(tcg_res, tcg_op1, tcg_op2, fpst); break; case 0x1: /* FDIV */ gen_helper_vfp_divs(tcg_res, tcg_op1, tcg_op2, fpst); break; case 0x2: /* FADD */ gen_helper_vfp_adds(tcg_res, tcg_op1, tcg_op2, fpst); break; case 0x3: /* FSUB */ gen_helper_vfp_subs(tcg_res, tcg_op1, tcg_op2, fpst); break; case 0x4: /* FMAX */ gen_helper_vfp_maxs(tcg_res, tcg_op1, tcg_op2, fpst); break; case 0x5: /* FMIN */ gen_helper_vfp_mins(tcg_res, tcg_op1, tcg_op2, fpst); break; case 0x6: /* FMAXNM */ gen_helper_vfp_maxnums(tcg_res, tcg_op1, tcg_op2, fpst); break; case 0x7: /* FMINNM */ gen_helper_vfp_minnums(tcg_res, tcg_op1, tcg_op2, fpst); break; case 0x8: /* FNMUL */ gen_helper_vfp_muls(tcg_res, tcg_op1, tcg_op2, fpst); gen_helper_vfp_negs(tcg_res, tcg_res); break; } write_fp_sreg(s, rd, tcg_res); tcg_temp_free_ptr(fpst); tcg_temp_free_i32(tcg_op1); tcg_temp_free_i32(tcg_op2); tcg_temp_free_i32(tcg_res); } /* C3.6.26 Floating-point data-processing (2 source) - double precision */ static void handle_fp_2src_double(DisasContext *s, int opcode, int rd, int rn, int rm) { TCGv_i64 tcg_op1; TCGv_i64 tcg_op2; TCGv_i64 tcg_res; TCGv_ptr fpst; tcg_res = tcg_temp_new_i64(); fpst = get_fpstatus_ptr(); tcg_op1 = read_fp_dreg(s, rn); tcg_op2 = read_fp_dreg(s, rm); switch (opcode) { case 0x0: /* FMUL */ gen_helper_vfp_muld(tcg_res, tcg_op1, tcg_op2, fpst); break; case 0x1: /* FDIV */ gen_helper_vfp_divd(tcg_res, tcg_op1, tcg_op2, fpst); break; case 0x2: /* FADD */ gen_helper_vfp_addd(tcg_res, tcg_op1, tcg_op2, fpst); break; case 0x3: /* FSUB */ gen_helper_vfp_subd(tcg_res, tcg_op1, tcg_op2, fpst); break; case 0x4: /* FMAX */ gen_helper_vfp_maxd(tcg_res, tcg_op1, tcg_op2, fpst); break; case 0x5: /* FMIN */ gen_helper_vfp_mind(tcg_res, tcg_op1, tcg_op2, fpst); break; case 0x6: /* FMAXNM */ gen_helper_vfp_maxnumd(tcg_res, tcg_op1, tcg_op2, fpst); break; case 0x7: /* FMINNM */ gen_helper_vfp_minnumd(tcg_res, tcg_op1, tcg_op2, fpst); break; case 0x8: /* FNMUL */ gen_helper_vfp_muld(tcg_res, tcg_op1, tcg_op2, fpst); gen_helper_vfp_negd(tcg_res, tcg_res); break; } write_fp_dreg(s, rd, tcg_res); tcg_temp_free_ptr(fpst); tcg_temp_free_i64(tcg_op1); tcg_temp_free_i64(tcg_op2); tcg_temp_free_i64(tcg_res); } /* C3.6.26 Floating point data-processing (2 source) * 31 30 29 28 24 23 22 21 20 16 15 12 11 10 9 5 4 0 * +---+---+---+-----------+------+---+------+--------+-----+------+------+ * | M | 0 | S | 1 1 1 1 0 | type | 1 | Rm | opcode | 1 0 | Rn | Rd | * +---+---+---+-----------+------+---+------+--------+-----+------+------+ */ static void disas_fp_2src(DisasContext *s, uint32_t insn) { int type = extract32(insn, 22, 2); int rd = extract32(insn, 0, 5); int rn = extract32(insn, 5, 5); int rm = extract32(insn, 16, 5); int opcode = extract32(insn, 12, 4); if (opcode > 8) { unallocated_encoding(s); return; } switch (type) { case 0: handle_fp_2src_single(s, opcode, rd, rn, rm); break; case 1: handle_fp_2src_double(s, opcode, rd, rn, rm); break; default: unallocated_encoding(s); } } /* C3.6.27 Floating-point data-processing (3 source) - single precision */ static void handle_fp_3src_single(DisasContext *s, bool o0, bool o1, int rd, int rn, int rm, int ra) { TCGv_i32 tcg_op1, tcg_op2, tcg_op3; TCGv_i32 tcg_res = tcg_temp_new_i32(); TCGv_ptr fpst = get_fpstatus_ptr(); tcg_op1 = read_fp_sreg(s, rn); tcg_op2 = read_fp_sreg(s, rm); tcg_op3 = read_fp_sreg(s, ra); /* These are fused multiply-add, and must be done as one * floating point operation with no rounding between the * multiplication and addition steps. * NB that doing the negations here as separate steps is * correct : an input NaN should come out with its sign bit * flipped if it is a negated-input. */ if (o1 == true) { gen_helper_vfp_negs(tcg_op3, tcg_op3); } if (o0 != o1) { gen_helper_vfp_negs(tcg_op1, tcg_op1); } gen_helper_vfp_muladds(tcg_res, tcg_op1, tcg_op2, tcg_op3, fpst); write_fp_sreg(s, rd, tcg_res); tcg_temp_free_ptr(fpst); tcg_temp_free_i32(tcg_op1); tcg_temp_free_i32(tcg_op2); tcg_temp_free_i32(tcg_op3); tcg_temp_free_i32(tcg_res); } /* C3.6.27 Floating-point data-processing (3 source) - double precision */ static void handle_fp_3src_double(DisasContext *s, bool o0, bool o1, int rd, int rn, int rm, int ra) { TCGv_i64 tcg_op1, tcg_op2, tcg_op3; TCGv_i64 tcg_res = tcg_temp_new_i64(); TCGv_ptr fpst = get_fpstatus_ptr(); tcg_op1 = read_fp_dreg(s, rn); tcg_op2 = read_fp_dreg(s, rm); tcg_op3 = read_fp_dreg(s, ra); /* These are fused multiply-add, and must be done as one * floating point operation with no rounding between the * multiplication and addition steps. * NB that doing the negations here as separate steps is * correct : an input NaN should come out with its sign bit * flipped if it is a negated-input. */ if (o1 == true) { gen_helper_vfp_negd(tcg_op3, tcg_op3); } if (o0 != o1) { gen_helper_vfp_negd(tcg_op1, tcg_op1); } gen_helper_vfp_muladdd(tcg_res, tcg_op1, tcg_op2, tcg_op3, fpst); write_fp_dreg(s, rd, tcg_res); tcg_temp_free_ptr(fpst); tcg_temp_free_i64(tcg_op1); tcg_temp_free_i64(tcg_op2); tcg_temp_free_i64(tcg_op3); tcg_temp_free_i64(tcg_res); } /* C3.6.27 Floating point data-processing (3 source) * 31 30 29 28 24 23 22 21 20 16 15 14 10 9 5 4 0 * +---+---+---+-----------+------+----+------+----+------+------+------+ * | M | 0 | S | 1 1 1 1 1 | type | o1 | Rm | o0 | Ra | Rn | Rd | * +---+---+---+-----------+------+----+------+----+------+------+------+ */ static void disas_fp_3src(DisasContext *s, uint32_t insn) { int type = extract32(insn, 22, 2); int rd = extract32(insn, 0, 5); int rn = extract32(insn, 5, 5); int ra = extract32(insn, 10, 5); int rm = extract32(insn, 16, 5); bool o0 = extract32(insn, 15, 1); bool o1 = extract32(insn, 21, 1); switch (type) { case 0: handle_fp_3src_single(s, o0, o1, rd, rn, rm, ra); break; case 1: handle_fp_3src_double(s, o0, o1, rd, rn, rm, ra); break; default: unallocated_encoding(s); } } /* C3.6.28 Floating point immediate * 31 30 29 28 24 23 22 21 20 13 12 10 9 5 4 0 * +---+---+---+-----------+------+---+------------+-------+------+------+ * | M | 0 | S | 1 1 1 1 0 | type | 1 | imm8 | 1 0 0 | imm5 | Rd | * +---+---+---+-----------+------+---+------------+-------+------+------+ */ static void disas_fp_imm(DisasContext *s, uint32_t insn) { int rd = extract32(insn, 0, 5); int imm8 = extract32(insn, 13, 8); int is_double = extract32(insn, 22, 2); uint64_t imm; TCGv_i64 tcg_res; if (is_double > 1) { unallocated_encoding(s); return; } /* The imm8 encodes the sign bit, enough bits to represent * an exponent in the range 01....1xx to 10....0xx, * and the most significant 4 bits of the mantissa; see * VFPExpandImm() in the v8 ARM ARM. */ if (is_double) { imm = (extract32(imm8, 7, 1) ? 0x8000 : 0) | (extract32(imm8, 6, 1) ? 0x3fc0 : 0x4000) | extract32(imm8, 0, 6); imm <<= 48; } else { imm = (extract32(imm8, 7, 1) ? 0x8000 : 0) | (extract32(imm8, 6, 1) ? 0x3e00 : 0x4000) | (extract32(imm8, 0, 6) << 3); imm <<= 16; } tcg_res = tcg_const_i64(imm); write_fp_dreg(s, rd, tcg_res); tcg_temp_free_i64(tcg_res); } /* C3.6.29 Floating point <-> fixed point conversions * 31 30 29 28 24 23 22 21 20 19 18 16 15 10 9 5 4 0 * +----+---+---+-----------+------+---+-------+--------+-------+------+------+ * | sf | 0 | S | 1 1 1 1 0 | type | 0 | rmode | opcode | scale | Rn | Rd | * +----+---+---+-----------+------+---+-------+--------+-------+------+------+ */ static void disas_fp_fixed_conv(DisasContext *s, uint32_t insn) { unsupported_encoding(s, insn); } static void handle_fmov(DisasContext *s, int rd, int rn, int type, bool itof) { /* FMOV: gpr to or from float, double, or top half of quad fp reg, * without conversion. */ if (itof) { TCGv_i64 tcg_rn = cpu_reg(s, rn); switch (type) { case 0: { /* 32 bit */ TCGv_i64 tmp = tcg_temp_new_i64(); tcg_gen_ext32u_i64(tmp, tcg_rn); tcg_gen_st_i64(tmp, cpu_env, fp_reg_offset(rd, MO_64)); tcg_gen_movi_i64(tmp, 0); tcg_gen_st_i64(tmp, cpu_env, fp_reg_hi_offset(rd)); tcg_temp_free_i64(tmp); break; } case 1: { /* 64 bit */ TCGv_i64 tmp = tcg_const_i64(0); tcg_gen_st_i64(tcg_rn, cpu_env, fp_reg_offset(rd, MO_64)); tcg_gen_st_i64(tmp, cpu_env, fp_reg_hi_offset(rd)); tcg_temp_free_i64(tmp); break; } case 2: /* 64 bit to top half. */ tcg_gen_st_i64(tcg_rn, cpu_env, fp_reg_hi_offset(rd)); break; } } else { TCGv_i64 tcg_rd = cpu_reg(s, rd); switch (type) { case 0: /* 32 bit */ tcg_gen_ld32u_i64(tcg_rd, cpu_env, fp_reg_offset(rn, MO_32)); break; case 1: /* 64 bit */ tcg_gen_ld_i64(tcg_rd, cpu_env, fp_reg_offset(rn, MO_64)); break; case 2: /* 64 bits from top half */ tcg_gen_ld_i64(tcg_rd, cpu_env, fp_reg_hi_offset(rn)); break; } } } /* C3.6.30 Floating point <-> integer conversions * 31 30 29 28 24 23 22 21 20 19 18 16 15 10 9 5 4 0 * +----+---+---+-----------+------+---+-------+-----+-------------+----+----+ * | sf | 0 | S | 1 1 1 1 0 | type | 0 | rmode | opc | 0 0 0 0 0 0 | Rn | Rd | * +----+---+---+-----------+------+---+-------+-----+-------------+----+----+ */ static void disas_fp_int_conv(DisasContext *s, uint32_t insn) { int rd = extract32(insn, 0, 5); int rn = extract32(insn, 5, 5); int opcode = extract32(insn, 16, 3); int rmode = extract32(insn, 19, 2); int type = extract32(insn, 22, 2); bool sbit = extract32(insn, 29, 1); bool sf = extract32(insn, 31, 1); if (!sbit && (rmode < 2) && (opcode > 5)) { /* FMOV */ bool itof = opcode & 1; switch (sf << 3 | type << 1 | rmode) { case 0x0: /* 32 bit */ case 0xa: /* 64 bit */ case 0xd: /* 64 bit to top half of quad */ break; default: /* all other sf/type/rmode combinations are invalid */ unallocated_encoding(s); break; } handle_fmov(s, rd, rn, type, itof); } else { /* actual FP conversions */ unsupported_encoding(s, insn); } } /* FP-specific subcases of table C3-6 (SIMD and FP data processing) * 31 30 29 28 25 24 0 * +---+---+---+---------+-----------------------------+ * | | 0 | | 1 1 1 1 | | * +---+---+---+---------+-----------------------------+ */ static void disas_data_proc_fp(DisasContext *s, uint32_t insn) { if (extract32(insn, 24, 1)) { /* Floating point data-processing (3 source) */ disas_fp_3src(s, insn); } else if (extract32(insn, 21, 1) == 0) { /* Floating point to fixed point conversions */ disas_fp_fixed_conv(s, insn); } else { switch (extract32(insn, 10, 2)) { case 1: /* Floating point conditional compare */ disas_fp_ccomp(s, insn); break; case 2: /* Floating point data-processing (2 source) */ disas_fp_2src(s, insn); break; case 3: /* Floating point conditional select */ disas_fp_csel(s, insn); break; case 0: switch (ctz32(extract32(insn, 12, 4))) { case 0: /* [15:12] == xxx1 */ /* Floating point immediate */ disas_fp_imm(s, insn); break; case 1: /* [15:12] == xx10 */ /* Floating point compare */ disas_fp_compare(s, insn); break; case 2: /* [15:12] == x100 */ /* Floating point data-processing (1 source) */ disas_fp_1src(s, insn); break; case 3: /* [15:12] == 1000 */ unallocated_encoding(s); break; default: /* [15:12] == 0000 */ /* Floating point <-> integer conversions */ disas_fp_int_conv(s, insn); break; } break; } } } static void disas_data_proc_simd(DisasContext *s, uint32_t insn) { /* Note that this is called with all non-FP cases from * table C3-6 so it must UNDEF for entries not specifically * allocated to instructions in that table. */ unsupported_encoding(s, insn); } /* C3.6 Data processing - SIMD and floating point */ static void disas_data_proc_simd_fp(DisasContext *s, uint32_t insn) { if (extract32(insn, 28, 1) == 1 && extract32(insn, 30, 1) == 0) { disas_data_proc_fp(s, insn); } else { /* SIMD, including crypto */ disas_data_proc_simd(s, insn); } } /* C3.1 A64 instruction index by encoding */ static void disas_a64_insn(CPUARMState *env, DisasContext *s) { uint32_t insn; insn = arm_ldl_code(env, s->pc, s->bswap_code); s->insn = insn; s->pc += 4; switch (extract32(insn, 25, 4)) { case 0x0: case 0x1: case 0x2: case 0x3: /* UNALLOCATED */ unallocated_encoding(s); break; case 0x8: case 0x9: /* Data processing - immediate */ disas_data_proc_imm(s, insn); break; case 0xa: case 0xb: /* Branch, exception generation and system insns */ disas_b_exc_sys(s, insn); break; case 0x4: case 0x6: case 0xc: case 0xe: /* Loads and stores */ disas_ldst(s, insn); break; case 0x5: case 0xd: /* Data processing - register */ disas_data_proc_reg(s, insn); break; case 0x7: case 0xf: /* Data processing - SIMD and floating point */ disas_data_proc_simd_fp(s, insn); break; default: assert(FALSE); /* all 15 cases should be handled above */ break; } /* if we allocated any temporaries, free them here */ free_tmp_a64(s); } void gen_intermediate_code_internal_a64(ARMCPU *cpu, TranslationBlock *tb, bool search_pc) { CPUState *cs = CPU(cpu); CPUARMState *env = &cpu->env; DisasContext dc1, *dc = &dc1; CPUBreakpoint *bp; uint16_t *gen_opc_end; int j, lj; target_ulong pc_start; target_ulong next_page_start; int num_insns; int max_insns; pc_start = tb->pc; dc->tb = tb; gen_opc_end = tcg_ctx.gen_opc_buf + OPC_MAX_SIZE; dc->is_jmp = DISAS_NEXT; dc->pc = pc_start; dc->singlestep_enabled = cs->singlestep_enabled; dc->condjmp = 0; dc->aarch64 = 1; dc->thumb = 0; dc->bswap_code = 0; dc->condexec_mask = 0; dc->condexec_cond = 0; #if !defined(CONFIG_USER_ONLY) dc->user = 0; #endif dc->vfp_enabled = 0; dc->vec_len = 0; dc->vec_stride = 0; dc->cp_regs = cpu->cp_regs; dc->current_pl = arm_current_pl(env); init_tmp_a64_array(dc); next_page_start = (pc_start & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE; lj = -1; num_insns = 0; max_insns = tb->cflags & CF_COUNT_MASK; if (max_insns == 0) { max_insns = CF_COUNT_MASK; } gen_tb_start(); tcg_clear_temp_count(); do { if (unlikely(!QTAILQ_EMPTY(&env->breakpoints))) { QTAILQ_FOREACH(bp, &env->breakpoints, entry) { if (bp->pc == dc->pc) { gen_exception_insn(dc, 0, EXCP_DEBUG); /* Advance PC so that clearing the breakpoint will invalidate this TB. */ dc->pc += 2; goto done_generating; } } } if (search_pc) { j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf; if (lj < j) { lj++; while (lj < j) { tcg_ctx.gen_opc_instr_start[lj++] = 0; } } tcg_ctx.gen_opc_pc[lj] = dc->pc; tcg_ctx.gen_opc_instr_start[lj] = 1; tcg_ctx.gen_opc_icount[lj] = num_insns; } if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO)) { gen_io_start(); } if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP | CPU_LOG_TB_OP_OPT))) { tcg_gen_debug_insn_start(dc->pc); } disas_a64_insn(env, dc); if (tcg_check_temp_count()) { fprintf(stderr, "TCG temporary leak before "TARGET_FMT_lx"\n", dc->pc); } /* Translation stops when a conditional branch is encountered. * Otherwise the subsequent code could get translated several times. * Also stop translation when a page boundary is reached. This * ensures prefetch aborts occur at the right place. */ num_insns++; } while (!dc->is_jmp && tcg_ctx.gen_opc_ptr < gen_opc_end && !cs->singlestep_enabled && !singlestep && dc->pc < next_page_start && num_insns < max_insns); if (tb->cflags & CF_LAST_IO) { gen_io_end(); } if (unlikely(cs->singlestep_enabled) && dc->is_jmp != DISAS_EXC) { /* Note that this means single stepping WFI doesn't halt the CPU. * For conditional branch insns this is harmless unreachable code as * gen_goto_tb() has already handled emitting the debug exception * (and thus a tb-jump is not possible when singlestepping). */ assert(dc->is_jmp != DISAS_TB_JUMP); if (dc->is_jmp != DISAS_JUMP) { gen_a64_set_pc_im(dc->pc); } gen_exception(EXCP_DEBUG); } else { switch (dc->is_jmp) { case DISAS_NEXT: gen_goto_tb(dc, 1, dc->pc); break; default: case DISAS_UPDATE: gen_a64_set_pc_im(dc->pc); /* fall through */ case DISAS_JUMP: /* indicate that the hash table must be used to find the next TB */ tcg_gen_exit_tb(0); break; case DISAS_TB_JUMP: case DISAS_EXC: case DISAS_SWI: break; case DISAS_WFI: /* This is a special case because we don't want to just halt the CPU * if trying to debug across a WFI. */ gen_helper_wfi(cpu_env); break; } } done_generating: gen_tb_end(tb, num_insns); *tcg_ctx.gen_opc_ptr = INDEX_op_end; #ifdef DEBUG_DISAS if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) { qemu_log("----------------\n"); qemu_log("IN: %s\n", lookup_symbol(pc_start)); log_target_disas(env, pc_start, dc->pc - pc_start, dc->thumb | (dc->bswap_code << 1)); qemu_log("\n"); } #endif if (search_pc) { j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf; lj++; while (lj <= j) { tcg_ctx.gen_opc_instr_start[lj++] = 0; } } else { tb->size = dc->pc - pc_start; tb->icount = num_insns; } }