Mirrors/cpu-emulator
1
0
Fork 0
mirror of https://github.com/tuz358/cpu-emulator.git synced 2025-12-18 13:04:35 +03:00
Code Issues Actions Packages Projects Releases Wiki Activity

Update cmp_eax_imm32(0x3d) instruction

Browse Source
This commit is contained in:
tuz358
2018-03-16 15:14:20 +09:00
parent 8553a6905b
commit f6a63b323a
1 changed files with 10 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files

35
instructions.cpp
View File

@@ -177,20 +177,13 @@ void Instructions::template_rm32_r32(int calc_type){
void Instructions::calc_rm32_r32_case0to2(uint32_t addr, uint32_t dst, int calc_type){
switch (calc_type) {
case ADD:
memory.write_uint32(addr, dst + this->registers[this->R]); break;
case OR:
memory.write_uint32(addr, dst | this->registers[this->R]); break;
case ADC:
memory.write_uint32(addr, dst + this->registers[this->R] + get_flag(CF)); break;
case SBB:
memory.write_uint32(addr, dst - (this->registers[this->R] + get_flag(CF))); break;
case AND:
memory.write_uint32(addr, dst & this->registers[this->R]); break;
case SUB:
memory.write_uint32(addr, dst - this->registers[this->R]); break;
case XOR:
memory.write_uint32(addr, dst ^ this->registers[this->R]); break;
case ADD: memory.write_uint32(addr, dst + this->registers[this->R]); break;
case OR: memory.write_uint32(addr, dst | this->registers[this->R]); break;
case ADC: memory.write_uint32(addr, dst + this->registers[this->R] + get_flag(CF)); break;
case SBB: memory.write_uint32(addr, dst - (this->registers[this->R] + get_flag(CF))); break;
case AND: memory.write_uint32(addr, dst & this->registers[this->R]); break;
case SUB: memory.write_uint32(addr, dst - this->registers[this->R]); break;
case XOR: memory.write_uint32(addr, dst ^ this->registers[this->R]); break;
case CMP:
// TODO: implement
break;
@@ -276,9 +269,7 @@ void Instructions::template_eax_imm32(int calc_type){
case AND: this->registers[0] &= imm32; break;
case SUB: this->registers[0] -= imm32; break;
case XOR: this->registers[0] ^= imm32; break;
case CMP:
// TODO: implement
break;
case CMP: set_flag(!(this->registers[0] - imm32), ZF); break;
default: break;
}
}
@@ -364,13 +355,7 @@ void Instructions::cmp_rm32_r32(){
}
}
void Instructions::cmp_eax_imm32(){
this->eip++;
uint32_t imm32 = memory.read_uint32(this->eip);
imm32 = swap_endian32(imm32);
uint32_t result = this->registers[0] - imm32;
set_flag(!result, ZF);
}
void Instructions::cmp_eax_imm32(){ this->template_eax_imm32(CMP); }
void Instructions::inc_eax(){ this->registers[0]++; }
void Instructions::inc_ecx(){ this->registers[1]++; }
@@ -784,7 +769,7 @@ void Instructions::mov_edi_imm32(){
this->registers[7] = imm32;
this->eip += 4;
}
j
void Instructions::ret(){
//printf("ret called.\n");
this->eip = memory.read_uint32(this->registers[4]);