diff options
| -rw-r--r-- | tcg/tci.c | 111 |
1 files changed, 67 insertions, 44 deletions
@@ -83,6 +83,20 @@ static uint64_t tci_uint64(uint32_t high, uint32_t low) } #endif +/* Read constant byte from bytecode. */ +static uint8_t tci_read_b(const uint8_t **tb_ptr) +{ + return *(tb_ptr[0]++); +} + +/* Read register number from bytecode. */ +static TCGReg tci_read_r(const uint8_t **tb_ptr) +{ + uint8_t regno = tci_read_b(tb_ptr); + tci_assert(regno < TCG_TARGET_NB_REGS); + return regno; +} + /* Read constant (native size) from bytecode. */ static tcg_target_ulong tci_read_i(const uint8_t **tb_ptr) { @@ -161,6 +175,23 @@ static tcg_target_ulong tci_read_label(const uint8_t **tb_ptr) return label; } +/* + * Load sets of arguments all at once. The naming convention is: + * tci_args_<arguments> + * where arguments is a sequence of + * + * r = register + * s = signed ldst offset + */ + +static void tci_args_rrs(const uint8_t **tb_ptr, + TCGReg *r0, TCGReg *r1, int32_t *i2) +{ + *r0 = tci_read_r(tb_ptr); + *r1 = tci_read_r(tb_ptr); + *i2 = tci_read_s32(tb_ptr); +} + static bool tci_compare32(uint32_t u0, uint32_t u1, TCGCond condition) { bool result = false; @@ -311,6 +342,7 @@ uintptr_t QEMU_DISABLE_CFI tcg_qemu_tb_exec(CPUArchState *env, uint8_t op_size = tb_ptr[1]; const uint8_t *old_code_ptr = tb_ptr; #endif + TCGReg r0, r1; tcg_target_ulong t0; tcg_target_ulong t1; tcg_target_ulong t2; @@ -325,6 +357,8 @@ uintptr_t QEMU_DISABLE_CFI tcg_qemu_tb_exec(CPUArchState *env, uint64_t v64; #endif TCGMemOpIdx oi; + int32_t ofs; + void *ptr; /* Skip opcode and size entry. */ tb_ptr += 2; @@ -401,54 +435,46 @@ uintptr_t QEMU_DISABLE_CFI tcg_qemu_tb_exec(CPUArchState *env, /* Load/store operations (32 bit). */ CASE_32_64(ld8u) - t0 = *tb_ptr++; - t1 = tci_read_rval(regs, &tb_ptr); - t2 = tci_read_s32(&tb_ptr); - tci_write_reg(regs, t0, *(uint8_t *)(t1 + t2)); + tci_args_rrs(&tb_ptr, &r0, &r1, &ofs); + ptr = (void *)(regs[r1] + ofs); + regs[r0] = *(uint8_t *)ptr; break; CASE_32_64(ld8s) - t0 = *tb_ptr++; - t1 = tci_read_rval(regs, &tb_ptr); - t2 = tci_read_s32(&tb_ptr); - tci_write_reg(regs, t0, *(int8_t *)(t1 + t2)); + tci_args_rrs(&tb_ptr, &r0, &r1, &ofs); + ptr = (void *)(regs[r1] + ofs); + regs[r0] = *(int8_t *)ptr; break; CASE_32_64(ld16u) - t0 = *tb_ptr++; - t1 = tci_read_rval(regs, &tb_ptr); - t2 = tci_read_s32(&tb_ptr); - tci_write_reg(regs, t0, *(uint16_t *)(t1 + t2)); + tci_args_rrs(&tb_ptr, &r0, &r1, &ofs); + ptr = (void *)(regs[r1] + ofs); + regs[r0] = *(uint16_t *)ptr; break; CASE_32_64(ld16s) - t0 = *tb_ptr++; - t1 = tci_read_rval(regs, &tb_ptr); - t2 = tci_read_s32(&tb_ptr); - tci_write_reg(regs, t0, *(int16_t *)(t1 + t2)); + tci_args_rrs(&tb_ptr, &r0, &r1, &ofs); + ptr = (void *)(regs[r1] + ofs); + regs[r0] = *(int16_t *)ptr; break; case INDEX_op_ld_i32: CASE_64(ld32u) - t0 = *tb_ptr++; - t1 = tci_read_rval(regs, &tb_ptr); - t2 = tci_read_s32(&tb_ptr); - tci_write_reg(regs, t0, *(uint32_t *)(t1 + t2)); + tci_args_rrs(&tb_ptr, &r0, &r1, &ofs); + ptr = (void *)(regs[r1] + ofs); + regs[r0] = *(uint32_t *)ptr; break; CASE_32_64(st8) - t0 = tci_read_rval(regs, &tb_ptr); - t1 = tci_read_rval(regs, &tb_ptr); - t2 = tci_read_s32(&tb_ptr); - *(uint8_t *)(t1 + t2) = t0; + tci_args_rrs(&tb_ptr, &r0, &r1, &ofs); + ptr = (void *)(regs[r1] + ofs); + *(uint8_t *)ptr = regs[r0]; break; CASE_32_64(st16) - t0 = tci_read_rval(regs, &tb_ptr); - t1 = tci_read_rval(regs, &tb_ptr); - t2 = tci_read_s32(&tb_ptr); - *(uint16_t *)(t1 + t2) = t0; + tci_args_rrs(&tb_ptr, &r0, &r1, &ofs); + ptr = (void *)(regs[r1] + ofs); + *(uint16_t *)ptr = regs[r0]; break; case INDEX_op_st_i32: CASE_64(st32) - t0 = tci_read_rval(regs, &tb_ptr); - t1 = tci_read_rval(regs, &tb_ptr); - t2 = tci_read_s32(&tb_ptr); - *(uint32_t *)(t1 + t2) = t0; + tci_args_rrs(&tb_ptr, &r0, &r1, &ofs); + ptr = (void *)(regs[r1] + ofs); + *(uint32_t *)ptr = regs[r0]; break; /* Arithmetic operations (mixed 32/64 bit). */ @@ -673,22 +699,19 @@ uintptr_t QEMU_DISABLE_CFI tcg_qemu_tb_exec(CPUArchState *env, /* Load/store operations (64 bit). */ case INDEX_op_ld32s_i64: - t0 = *tb_ptr++; - t1 = tci_read_rval(regs, &tb_ptr); - t2 = tci_read_s32(&tb_ptr); - tci_write_reg(regs, t0, *(int32_t *)(t1 + t2)); + tci_args_rrs(&tb_ptr, &r0, &r1, &ofs); + ptr = (void *)(regs[r1] + ofs); + regs[r0] = *(int32_t *)ptr; break; case INDEX_op_ld_i64: - t0 = *tb_ptr++; - t1 = tci_read_rval(regs, &tb_ptr); - t2 = tci_read_s32(&tb_ptr); - tci_write_reg(regs, t0, *(uint64_t *)(t1 + t2)); + tci_args_rrs(&tb_ptr, &r0, &r1, &ofs); + ptr = (void *)(regs[r1] + ofs); + regs[r0] = *(uint64_t *)ptr; break; case INDEX_op_st_i64: - t0 = tci_read_rval(regs, &tb_ptr); - t1 = tci_read_rval(regs, &tb_ptr); - t2 = tci_read_s32(&tb_ptr); - *(uint64_t *)(t1 + t2) = t0; + tci_args_rrs(&tb_ptr, &r0, &r1, &ofs); + ptr = (void *)(regs[r1] + ofs); + *(uint64_t *)ptr = regs[r0]; break; /* Arithmetic operations (64 bit). */ |