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shader: classify native half values with shared operand decoding

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This commit is contained in:
nmzik
2026-10-05 15:31:47 +04:00
parent 1d41ddb378
commit 7a0e1dafd7
13 changed files with 208 additions and 81 deletions
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src/graphics/shader/recompiler/frontend/translate/Compare.cpp
+7 -5
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@@ -72,11 +72,13 @@ void Translator::EmitFloatOrderedCompare(const Decoder::Instruction& inst, bool
EmitCompareResult(inst, ordered ? ir.LogicalNot(unordered) : unordered, false, cmpx);
}
void Translator::EmitFloatClassCompare(const Decoder::Instruction& inst, bool cmpx) {
const auto value = ReadOperand(inst.src0, IR::Type::F32);
const auto mask = ReadOperand(inst.src1, IR::Type::U32);
EmitCompareResult(inst, IR::U1(ir.Emit(IR::ValueOpcode::FPCmpClass32, {value, mask})), false,
cmpx);
void Translator::EmitFloatClassCompare(const Decoder::Instruction& inst, bool cmpx, bool half) {
const auto value = half ? IR::Value(Read16LaneBits(inst.src0, false))
: ReadOperand(inst.src0, IR::Type::F32);
const auto mask = half ? IR::Value(Read16LaneBits(inst.src1, false))
: ReadOperand(inst.src1, IR::Type::U32);
const auto opcode = half ? IR::ValueOpcode::FPCmpClass16 : IR::ValueOpcode::FPCmpClass32;
EmitCompareResult(inst, IR::U1(ir.Emit(opcode, {value, mask})), false, cmpx);
}
} // namespace Libs::Graphics::ShaderRecompiler::Frontend
src/graphics/shader/recompiler/frontend/translate/Float.cpp
+4 -4
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@@ -8,13 +8,13 @@ namespace Libs::Graphics::ShaderRecompiler::Frontend {
void Translator::PackedFloat16(const Decoder::Instruction& inst, IR::ValueOpcode opcode,
bool accumulator, bool quiet_snan) {
const auto translate_lane = [&](bool high) {
const auto lhs = ReadF16LaneAsF32(inst.src0, high, true);
const auto rhs = ReadF16LaneAsF32(inst.src1, high, true);
const auto lhs = ReadF16LaneAsF32(inst.src0, high);
const auto rhs = ReadF16LaneAsF32(inst.src1, high);
IR::F32 result;
if (accumulator) {
result = IR::F32(ir.Emit(opcode, {lhs, rhs, ReadF16LaneAsF32(inst.dst, high, true)}));
result = IR::F32(ir.Emit(opcode, {lhs, rhs, ReadF16LaneAsF32(inst.dst, high)}));
} else if (inst.src_count == 3u) {
result = IR::F32(ir.Emit(opcode, {lhs, rhs, ReadF16LaneAsF32(inst.src2, high, true)}));
result = IR::F32(ir.Emit(opcode, {lhs, rhs, ReadF16LaneAsF32(inst.src2, high)}));
} else {
result = IR::F32(ir.Emit(opcode, {lhs, rhs}));
}
src/graphics/shader/recompiler/frontend/translate/Translate.cpp
+30 -59
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@@ -503,41 +503,11 @@ IR::U64 Translator::ReadU64(const Decoder::Operand& operand) {
return IR::U64(ReadOperand(operand, IR::Type::U64));
}
IR::F32 Translator::ReadF16LaneAsF32(const Decoder::Operand& operand, bool high_lane, bool packed) {
if (operand.kind == Decoder::OperandKind::FloatInlineConstant) {
const bool use_zero = packed && (high_lane ? operand.op_sel_hi : operand.op_sel);
auto value = use_zero ? IR::F32(IR::Value::F32(0.0f))
: ir.BitCastF32(IR::U32(IR::Value(operand.value)));
const auto half = IR::F16(ir.Emit(IR::ValueOpcode::ConvertF16F32, {value}));
value = IR::F32(ir.Emit(IR::ValueOpcode::ConvertF32F16, {half}));
if (operand.absolute) {
value = IR::F32(ir.Emit(IR::ValueOpcode::FPAbs32, {value}));
}
if (high_lane ? operand.negate_hi : operand.negate) {
value = IR::F32(ir.Emit(IR::ValueOpcode::FPNeg32, {value}));
}
return value;
}
auto raw_operand = operand;
raw_operand.sdwa_sel = 6;
raw_operand.sdwa_sext = false;
const auto bits = ApplyBitSourceModifiers(raw_operand, ReadRawU32(operand));
uint32_t offset = (high_lane ? operand.op_sel_hi : operand.op_sel) ? 16u : 0u;
if (operand.sdwa_sel == 4u || operand.sdwa_sel == 5u) {
offset = operand.sdwa_sel == 5u ? 16u : 0u;
}
const auto half_u32 = IR::U32(
ir.Emit(IR::ValueOpcode::BitFieldUExtract, {bits, IR::Value(offset), IR::Value(16u)}));
const auto half_u16 = IR::U16(ir.Emit(IR::ValueOpcode::ConvertU16U32, {half_u32}));
IR::F32 Translator::ReadF16LaneAsF32(const Decoder::Operand& operand, bool high_lane) {
const auto bits = Read16LaneBits(operand, high_lane);
const auto half_u16 = IR::U16(ir.Emit(IR::ValueOpcode::ConvertU16U32, {bits}));
const auto half = IR::F16(ir.Emit(IR::ValueOpcode::BitCastF16U16, {half_u16}));
auto value = IR::F32(ir.Emit(IR::ValueOpcode::ConvertF32F16, {half}));
if (operand.absolute) {
value = IR::F32(ir.Emit(IR::ValueOpcode::FPAbs32, {value}));
}
if (high_lane ? operand.negate_hi : operand.negate) {
value = IR::F32(ir.Emit(IR::ValueOpcode::FPNeg32, {value}));
}
return value;
return IR::F32(ir.Emit(IR::ValueOpcode::ConvertF32F16, {half}));
}
IR::F32 Translator::ReadF16AsF32(const Decoder::Operand& operand) {
@@ -555,29 +525,6 @@ IR::F32 Translator::ReadMixF32(const Decoder::Operand& operand) {
return IR::F32(ReadOperand(value_operand, IR::Type::F32));
}
IR::U32 Translator::ReadU16LaneRaw(const Decoder::Operand& operand, bool high_lane) {
auto raw_operand = operand;
raw_operand.sdwa_sel = 6;
raw_operand.sdwa_sext = false;
const auto bits = ApplyBitSourceModifiers(raw_operand, ReadRawU32(operand));
uint32_t offset = (high_lane ? operand.op_sel_hi : operand.op_sel) ? 16u : 0u;
uint32_t width = 16u;
if (operand.sdwa_sel <= 3u) {
offset = operand.sdwa_sel * 8u;
width = 8u;
} else if (operand.sdwa_sel == 4u || operand.sdwa_sel == 5u) {
offset = operand.sdwa_sel == 5u ? 16u : 0u;
}
if (width == 8u && operand.sdwa_sext) {
// Extend the selected byte into the 16-bit operand before halfword modifiers.
const auto value = IR::U32(
ir.Emit(IR::ValueOpcode::BitFieldSExtract, {bits, IR::Value(offset), IR::Value(width)}));
return ir.BitwiseAnd(value, IR::U32(IR::Value(0xffffu)));
}
return IR::U32(
ir.Emit(IR::ValueOpcode::BitFieldUExtract, {bits, IR::Value(offset), IR::Value(width)}));
}
IR::U32 Translator::ReadU16LaneAsU32(const Decoder::Operand& operand, bool high_lane,
bool sign_extend) {
auto value = Read16LaneBits(operand, high_lane);
@@ -593,12 +540,36 @@ IR::U32 Translator::ReadU16AsU32(const Decoder::Operand& operand, bool sign_exte
}
IR::U32 Translator::Read16LaneBits(const Decoder::Operand& operand, bool high_lane) {
auto value = ReadU16LaneRaw(operand, high_lane);
auto raw_operand = operand;
raw_operand.sdwa_sel = 6;
raw_operand.sdwa_sext = false;
auto bits = ReadRawU32(operand);
if (operand.kind == Decoder::OperandKind::FloatInlineConstant) {
// Inline floats encode the operand's width before SDWA or OP_SEL selects bits.
const auto half = IR::F16(ir.Emit(IR::ValueOpcode::ConvertF16F32, {ir.BitCastF32(bits)}));
const auto half_bits = IR::U16(ir.Emit(IR::ValueOpcode::BitCastU16F16, {half}));
bits = IR::U32(ir.Emit(IR::ValueOpcode::ConvertU32U16, {half_bits}));
}
bits = ApplyBitSourceModifiers(raw_operand, bits);
uint32_t offset = (high_lane ? operand.op_sel_hi : operand.op_sel) ? 16u : 0u;
uint32_t width = 16u;
if (operand.sdwa_sel <= 3u) {
offset = operand.sdwa_sel * 8u;
width = 8u;
} else if (operand.sdwa_sel == 4u || operand.sdwa_sel == 5u) {
offset = operand.sdwa_sel == 5u ? 16u : 0u;
}
const auto extract = width == 8u && operand.sdwa_sext
? IR::ValueOpcode::BitFieldSExtract
: IR::ValueOpcode::BitFieldUExtract;
auto value = IR::U32(ir.Emit(extract, {bits, IR::Value(offset), IR::Value(width)}));
if (width == 8u && operand.sdwa_sext) {
value = ir.BitwiseAnd(value, IR::U32(IR::Value(0xffffu)));
}
if (operand.absolute) {
value = ir.BitwiseAnd(value, IR::U32(IR::Value(0x7fffu)));
}
if (high_lane ? operand.negate_hi : operand.negate) {
// RDNA2 source NEG flips the sign bit, including packed integer operands.
value = ir.BitwiseXor(value, IR::U32(IR::Value(0x8000u)));
}
return value;
src/graphics/shader/recompiler/frontend/translate/Translator.h
+2 -3
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@@ -40,10 +40,9 @@ private:
IR::U32 ReadU32(const Decoder::Operand& operand);
std::array<IR::U32, 2> ReadU32Pair(const Decoder::Operand& operand);
IR::U64 ReadU64(const Decoder::Operand& operand);
IR::F32 ReadF16LaneAsF32(const Decoder::Operand& operand, bool high_lane, bool packed = false);
IR::F32 ReadF16LaneAsF32(const Decoder::Operand& operand, bool high_lane);
IR::F32 ReadF16AsF32(const Decoder::Operand& operand);
IR::F32 ReadMixF32(const Decoder::Operand& operand);
IR::U32 ReadU16LaneRaw(const Decoder::Operand& operand, bool high_lane);
IR::U32 ReadU16LaneAsU32(const Decoder::Operand& operand, bool high_lane, bool sign_extend);
IR::U32 ReadU16AsU32(const Decoder::Operand& operand, bool sign_extend);
IR::U32 Read16LaneBits(const Decoder::Operand& operand, bool high_lane);
@@ -127,7 +126,7 @@ private:
void EmitFloatCompare(const Decoder::Instruction& inst, IR::ValueOpcode opcode, bool half,
bool cmpx);
void EmitFloatOrderedCompare(const Decoder::Instruction& inst, bool ordered, bool cmpx);
void EmitFloatClassCompare(const Decoder::Instruction& inst, bool cmpx);
void EmitFloatClassCompare(const Decoder::Instruction& inst, bool cmpx, bool half = false);
void V_CVT_F32_UBYTE(const Decoder::Instruction& inst, uint32_t byte_index);
void V_CVT_F32_U32(const Decoder::Instruction& inst);
void V_CVT_F32_I32(const Decoder::Instruction& inst);
src/graphics/shader/recompiler/frontend/translate/Vector.cpp
+1
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@@ -346,6 +346,7 @@ void Translator::EmitVector(const Decoder::Instruction& inst) {
case O::V_CMPX_O_F32: EmitFloatOrderedCompare(inst, true, true); return;
case O::V_CMP_CLASS_F32: EmitFloatClassCompare(inst, false); return;
case O::V_CMPX_CLASS_F32: EmitFloatClassCompare(inst, true); return;
case O::V_CMPX_CLASS_F16: EmitFloatClassCompare(inst, true, true); return;
case O::V_CVT_F32_UBYTE0: V_CVT_F32_UBYTE(inst, 0); return;
case O::V_CVT_F32_UBYTE1: V_CVT_F32_UBYTE(inst, 1); return;