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Adjust doubleword multiply and divide implementations

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This commit is contained in:
Tharo 2024-05-11 19:02:10 +01:00
parent ee2e81eed2
commit 33aa2e3c49
1 changed files with 4 additions and 4 deletions
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8
src/recompilation.cpp
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@ -387,26 +387,26 @@ bool process_instruction(const RecompPort::Context& context, const RecompPort::C
print_line("result = S64(S32({}{})) * S64(S32({}{})); lo = S32(result >> 0); hi = S32(result >> 32)", ctx_gpr_prefix(rs), rs, ctx_gpr_prefix(rt), rt);
break;
case InstrId::cpu_dmult:
print_line("MUL128_S({}{}, {}{}, hi, lo)", ctx_gpr_prefix(rs), rs, ctx_gpr_prefix(rt), rt);
print_line("DMULT(S64({}{}), S64({}{}), &lo, &hi)", ctx_gpr_prefix(rs), rs, ctx_gpr_prefix(rt), rt);
break;
case InstrId::cpu_multu:
print_line("result = U64(U32({}{})) * U64(U32({}{})); lo = S32(result >> 0); hi = S32(result >> 32)", ctx_gpr_prefix(rs), rs, ctx_gpr_prefix(rt), rt);
break;
case InstrId::cpu_dmultu:
print_line("MUL128_U({}{}, {}{}, hi, lo)", ctx_gpr_prefix(rs), rs, ctx_gpr_prefix(rt), rt);
print_line("DMULTU(U64({}{}), U64({}{}), &lo, &hi)", ctx_gpr_prefix(rs), rs, ctx_gpr_prefix(rt), rt);
break;
case InstrId::cpu_div:
// Cast to 64-bits before division to prevent artihmetic exception for s32(0x80000000) / -1
print_line("lo = S32(S64(S32({}{})) / S64(S32({}{}))); hi = S32(S64(S32({}{})) % S64(S32({}{})))", ctx_gpr_prefix(rs), rs, ctx_gpr_prefix(rt), rt, ctx_gpr_prefix(rs), rs, ctx_gpr_prefix(rt), rt);
break;
case InstrId::cpu_ddiv:
print_line("lo = S64({}{}) / S64({}{}); hi = S64({}{}) % S64({}{})", ctx_gpr_prefix(rs), rs, ctx_gpr_prefix(rt), rt, ctx_gpr_prefix(rs), rs, ctx_gpr_prefix(rt), rt);
print_line("DDIV(S64({}{}), S64({}{}), &lo, &hi)", ctx_gpr_prefix(rs), rs, ctx_gpr_prefix(rt), rt);
break;
case InstrId::cpu_divu:
print_line("lo = S32(U32({}{}) / U32({}{})); hi = S32(U32({}{}) % U32({}{}))", ctx_gpr_prefix(rs), rs, ctx_gpr_prefix(rt), rt, ctx_gpr_prefix(rs), rs, ctx_gpr_prefix(rt), rt);
break;
case InstrId::cpu_ddivu:
print_line("lo = U64({}{}) / U64({}{}); hi = U64({}{}) % U64({}{})", ctx_gpr_prefix(rs), rs, ctx_gpr_prefix(rt), rt, ctx_gpr_prefix(rs), rs, ctx_gpr_prefix(rt), rt);
print_line("DDIVU(U64({}{}), U64({}{}), &lo, &hi)", ctx_gpr_prefix(rs), rs, ctx_gpr_prefix(rt), rt);
break;
case InstrId::cpu_mflo:
print_line("{}{} = lo", ctx_gpr_prefix(rd), rd);