Mirrors/cpu-emulator
1
0
Fork 0
mirror of https://github.com/tuz358/cpu-emulator.git synced 2025-12-18 21:14:35 +03:00
Code Issues Actions Packages Projects Releases Wiki Activity

Add sub_rm32_imm(0x81,0x83) instruction

Browse Source
This commit is contained in:
tuz358
2018-03-18 15:51:14 +09:00
parent b2838393aa
commit c00f7378b7
2 changed files with 21 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
include/instructions.h
View File

@@ -137,5 +137,6 @@ public:
void adc_rm32_imm(int imm_flag); void adc_rm32_imm(int imm_flag);
void sbb_rm32_imm(int imm_flag); void sbb_rm32_imm(int imm_flag);
void and_rm32_imm(int imm_flag); void and_rm32_imm(int imm_flag);
void sub_rm32_imm(int imm_flag);
void cmp_rm32_imm8(); void cmp_rm32_imm8();
}; };

22
instructions.cpp
View File

@@ -487,7 +487,7 @@ void Instructions::opcode_81(){
and_rm32_imm(IMM32); and_rm32_imm(IMM32);
break; break;
case 5: case 5:
// TODO: sub_rm32_imm32(); sub_rm32_imm(IMM32);
break; break;
case 6: case 6:
// TODO: xor_rm32_imm32(); // TODO: xor_rm32_imm32();
@@ -523,7 +523,7 @@ void Instructions::opcode_83(){
and_rm32_imm(IMM8); and_rm32_imm(IMM8);
break; break;
case 5: case 5:
// TODO: sub_rm32_imm8(); sub_rm32_imm(IMM8);
break; break;
case 6: case 6:
// TODO: xor_rm32_imm8(); // TODO: xor_rm32_imm8();
@@ -874,6 +874,24 @@ void Instructions::and_rm32_imm(int imm_flag){
this->eip++; this->eip++;
} }
void Instructions::sub_rm32_imm(int imm_flag){
//printf("sub_rm32_imm called.\n");
this->eip++;
if(imm_flag == IMM8){
uint8_t imm8 = memory.read_uint8(this->eip);
this->registers[this->M] -= imm8;
} else if(imm_flag == IMM32){
uint32_t imm32 = memory.read_uint32(this->eip);
imm32 = swap_endian32(imm32);
this->registers[this->M] -= imm32;
} else {
}
this->eip++;
}
void Instructions::cmp_rm32_imm8(){ void Instructions::cmp_rm32_imm8(){
//printf("cmp_rm32_imm8 called.\n"); //printf("cmp_rm32_imm8 called.\n");