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Fix: correct MULT/MULTU rd-register write and EI/DI COP0 Status bit (#72)

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* fix: MULT/MULTU now write rd in addition to HI/LO (R5900 extension)

* fix: EI/DI instructions now toggle COP0 Status bit 16 (EIE) instead of bit 0 (IE)
This commit is contained in:
Aslan Hud
2026-02-21 16:21:16 +01:00
committed by GitHub
parent d7701f9ea7
commit 130b8d2583
1 changed files with 4 additions and 4 deletions
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ps2xRecomp/src/lib/code_generator.cpp
+4 -4
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@@ -964,9 +964,9 @@ namespace ps2recomp
case SPECIAL_MTLO:
return fmt::format("ctx->lo = GPR_U32(ctx, {});", inst.rs);
case SPECIAL_MULT:
return fmt::format("{{ int64_t result = (int64_t)GPR_S32(ctx, {}) * (int64_t)GPR_S32(ctx, {}); ctx->lo = (uint32_t)result; ctx->hi = (uint32_t)(result >> 32); }}", inst.rs, inst.rt);
return fmt::format("{{ int64_t result = (int64_t)GPR_S32(ctx, {}) * (int64_t)GPR_S32(ctx, {}); ctx->lo = (uint32_t)result; ctx->hi = (uint32_t)(result >> 32); SET_GPR_S32(ctx, {}, (int32_t)(uint32_t)result); }}", inst.rs, inst.rt, inst.rd);
case SPECIAL_MULTU:
return fmt::format("{{ uint64_t result = (uint64_t)GPR_U32(ctx, {}) * (uint64_t)GPR_U32(ctx, {}); ctx->lo = (uint32_t)result; ctx->hi = (uint32_t)(result >> 32); }}", inst.rs, inst.rt);
return fmt::format("{{ uint64_t result = (uint64_t)GPR_U32(ctx, {}) * (uint64_t)GPR_U32(ctx, {}); ctx->lo = (uint32_t)result; ctx->hi = (uint32_t)(result >> 32); SET_GPR_U32(ctx, {}, (uint32_t)result); }}", inst.rs, inst.rt, inst.rd);
case SPECIAL_DIV:
return fmt::format("{{ int32_t divisor = GPR_S32(ctx, {}); "
" int32_t dividend = GPR_S32(ctx, {}); "
@@ -1258,9 +1258,9 @@ namespace ps2recomp
"return;" // Stop execution in this recompiled block
);
case COP0_CO_EI:
return fmt::format("ctx->cop0_status |= 0x1; // Enable interrupts");
return fmt::format("ctx->cop0_status |= 0x10000; // Enable interrupts");
case COP0_CO_DI:
return fmt::format("ctx->cop0_status &= ~0x1; // Disable interrupts");
return fmt::format("ctx->cop0_status &= ~0x10000; // Disable interrupts");
default:
return fmt::format("// Unhandled COP0 CO-OP: 0x{:X}", function);
}