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shader: write preserved SDWA fields with one bit-field insert and drop duplicate 16-bit masks

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nmzik committed 2026-10-21 22:52:14 +02:00
1 parent 10a852c2ac
commit aacf15fd0b
4 files changed
+15 -16
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src/graphics/shader/recompiler/frontend/translate/Translate.cpp
+9 -10
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@@ -296,15 +296,11 @@ void Translator::WriteRawU32(const Decoder::Operand& operand, IR::U32 value) {
value = ir.ShiftLeftLogical(extended, IR::U32(IR::Value(offset)));
break;
}
case 2: {
const uint32_t field_mask = width == 32u ? 0xffffffffu : (1u << width) - 1u;
const auto inserted =
ir.ShiftLeftLogical(ir.BitwiseAnd(value, IR::U32(IR::Value(field_mask))),
IR::U32(IR::Value(offset)));
const auto cleared = ir.BitwiseAnd(ReadRawU32(PlainOperand(operand)),
IR::U32(IR::Value(~(field_mask << offset))));
value = ir.BitwiseOr(cleared, inserted);
} break;
case 2:
value = IR::U32(ir.Emit(IR::ValueOpcode::BitFieldInsert,
{ReadRawU32(PlainOperand(operand)), value, IR::Value(offset),
IR::Value(width)}));
break;
default: EXIT("reserved SDWA DST_U mode");
}
}
@@ -453,7 +449,10 @@ void Translator::Write16Bits(const Decoder::Operand& operand, IR::U32 value) {
destination.omod = 0u;
destination.op_sel = false;
destination.clamp = false;
WriteRawU32(destination, ir.BitwiseAnd(value, IR::U32(IR::Value(0xffffu))));
// A field selector keeps only the field's bits; a full-dword SDWA selector zero-extends.
WriteRawU32(destination, destination.sdwa_sel == 6u
? ir.BitwiseAnd(value, IR::U32(IR::Value(0xffffu)))
: value);
}
void Translator::WriteF16(const Decoder::Operand& operand, IR::F32 value) {