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This commit is contained in:
SimoneN64
2023-08-13 10:42:12 +02:00
parent 180f07c23f
commit 63a10053f9
1 changed files with 29 additions and 14 deletions
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43
src/backend/core/JIT/instructions.cpp
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@@ -58,23 +58,37 @@ void JIT::daddiu(u32 instr) {
}
void JIT::div(u32 instr) {
movsxd(rax, dword[rdi + offsetof(Registers, gpr[RS(instr)])]); // dividend
movsxd(rcx, dword[rdi + offsetof(Registers, gpr[RS(instr)])]); // divisor
cmp(rcx, 0);
je("divisor==0");
CodeGenerator::div(rcx);
mov(qword[rdi + offsetof(Registers, lo)], eax);
mov(qword[rdi + offsetof(Registers, hi)], edx);
L("divisor==0");
mov(qword[rdi + offsetof(Registers, hi)], rax);
cmp(rax, 0);
jge("dividend>=0");
mov(qword[rdi + offsetof(Registers, lo)], s64(1));
L("dividend>=0");
mov(qword[rdi + offsetof(Registers, lo)], s64(-1));
}
void JIT::divu(u32 instr) {
mov(rax, dword[rdi + offsetof(Registers, gpr[RS(instr)])]);
mov(rcx, dword[rdi + offsetof(Registers, gpr[RS(instr)])]);
movsxd(rax, dword[rdi + offsetof(Registers, gpr[RS(instr)])]); // dividend
movsxd(rcx, dword[rdi + offsetof(Registers, gpr[RS(instr)])]); // divisor
cmp(rcx, 0);
je("");
if(divisor == 0) {
regs.lo = -1;
regs.hi = (s32)dividend;
} else {
s32 quotient = (s32)(dividend / divisor);
s32 remainder = (s32)(dividend % divisor);
regs.lo = quotient;
regs.hi = remainder;
}
je("divisor==0");
CodeGenerator::div(rcx);
mov(qword[rdi + offsetof(Registers, lo)], eax);
mov(qword[rdi + offsetof(Registers, hi)], edx);
L("divisor==0");
mov(qword[rdi + offsetof(Registers, hi)], rax);
mov(qword[rdi + offsetof(Registers, lo)], -1);
}
void JIT::ddiv(u32 instr) {
@@ -159,9 +173,10 @@ void JIT::bllink(u32 instr, bool cond) {
}
void JIT::lui(u32 instr) {
u64 val = s64((s16)instr);
u64 val = s64(s16(instr));
val <<= 16;
regs.gpr[RT(instr)] = val;
mov(qword[rdi + offsetof(Registers, gpr[RT(instr)])],
val);
}
void JIT::lb(u32 instr) {