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graphics: implement RDNA2 D16 image packing

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This commit is contained in:
nmzik
2026-08-20 18:06:43 +02:00
parent 1190d5de7d
commit 129c64235f
8 changed files with 168 additions and 21 deletions
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src/graphics/shader/recompiler/backend/spirv/spirvEmitterImage.cpp
+68 -7
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@@ -14,6 +14,13 @@ uint32_t DmaskComponentIndex(uint32_t dmask, uint32_t component) {
return index;
}
uint32_t DmaskComponent(uint32_t dmask, uint32_t index) {
for (uint32_t component = 0; component < 4u; component++) {
if (((dmask >> component) & 1u) != 0u && index-- == 0u) return component;
}
return 0u;
}
uint32_t ImageGatherComponent(uint32_t dmask) {
switch (dmask) {
case 0x2u: return 1;
@@ -191,7 +198,49 @@ uint32_t FloatBits(ValueEmitContext& ctx, uint32_t value) {
return Unary(ctx.state, OpBitcast, TypeU32(ctx.state), value);
}
uint32_t ResultVector(ValueEmitContext& ctx, uint32_t value, bool integer, bool dref) {
uint32_t ResultVector(ValueEmitContext& ctx, uint32_t value, bool integer, bool dref,
const IR::MemoryInfo& mem, bool gather = false) {
if (mem.data_bits == 16u) {
uint32_t packed[4] = {ConstantU32(ctx.state, 0), ConstantU32(ctx.state, 0),
ConstantU32(ctx.state, 0), ConstantU32(ctx.state, 0)};
const auto scalar = [&](uint32_t index) {
if (dref) return value;
const auto component = gather ? index : DmaskComponent(mem.dmask, index);
const auto result = ctx.state.builder.AllocateId();
ctx.state.builder.AddFunction(
{OpCompositeExtract, integer ? TypeU32(ctx.state) : TypeF32(ctx.state), result,
value, component});
return result;
};
for (uint32_t word = 0; word < mem.data_dwords; word++) {
const auto low_index = word * 2u;
const auto high_index = low_index + 1u;
const auto low = scalar(low_index);
const auto high = high_index < mem.component_count
? scalar(high_index)
: (integer ? ConstantU32(ctx.state, 0) : ZeroF32(ctx.state));
if (integer) {
const auto mask = ConstantU32(ctx.state, 0xffffu);
packed[word] = Binary(
ctx.state, OpBitwiseOr, TypeU32(ctx.state),
Binary(ctx.state, OpBitwiseAnd, TypeU32(ctx.state), low, mask),
Binary(ctx.state, OpShiftLeftLogical, TypeU32(ctx.state),
Binary(ctx.state, OpBitwiseAnd, TypeU32(ctx.state), high, mask),
ConstantU32(ctx.state, 16u)));
} else {
const auto pair = ctx.state.builder.AllocateId();
ctx.state.builder.AddFunction(
{OpCompositeConstruct, TypeF32Vector(ctx.state, 2), pair, low, high});
packed[word] = ctx.state.builder.AllocateId();
ctx.state.builder.AddFunction({OpExtInst, TypeU32(ctx.state), packed[word],
GlslStd450(ctx.state), GlslPackHalf2x16, pair});
}
}
const auto result = ctx.state.builder.AllocateId();
ctx.state.builder.AddFunction({OpCompositeConstruct, TypeU32Vector(ctx.state, 4), result,
packed[0], packed[1], packed[2], packed[3]});
return result;
}
uint32_t component[4] {};
for (uint32_t index = 0; index < 4u; index++) {
if (dref) {
@@ -319,9 +368,21 @@ uint32_t StoreTexel(ValueEmitContext& ctx, const IR::MemoryInfo& mem, uint32_t d
const auto packed_index = DmaskComponentIndex(dmask, source);
raw = ctx.state.builder.AllocateId();
ctx.state.builder.AddFunction(
{OpCompositeExtract, TypeU32(ctx.state), raw, data, packed_index});
{OpCompositeExtract, TypeU32(ctx.state), raw, data,
mem.data_bits == 16u ? packed_index / 2u : packed_index});
if (mem.data_bits == 16u) {
if ((packed_index & 1u) != 0u) {
raw = Binary(ctx.state, OpShiftRightLogical, TypeU32(ctx.state), raw,
ConstantU32(ctx.state, 16u));
}
raw = Binary(ctx.state, OpBitwiseAnd, TypeU32(ctx.state), raw,
ConstantU32(ctx.state, 0xffffu));
}
}
values[component] = integer ? raw : Unary(ctx.state, OpBitcast, TypeF32(ctx.state), raw);
values[component] = integer ? raw
: mem.data_bits == 16u ? EmitF16BitsToF32(ctx.state, raw)
: Unary(ctx.state, OpBitcast,
TypeF32(ctx.state), raw);
}
const auto texel = ctx.state.builder.AllocateId();
ctx.state.builder.AddFunction(
@@ -407,7 +468,7 @@ bool EmitValueImage(ValueEmitContext& ctx, const IR::Inst& inst) {
integer ? TypeU32Vector(state, 4) : TypeF32Vector(state, 4), color,
image, coord, ImageOperandsLodMask, LodU32(ctx, mem, *address, view)});
}
return ResultVector(ctx, color, integer, false);
return ResultVector(ctx, color, integer, false, mem);
}));
return true;
}
@@ -459,7 +520,7 @@ bool EmitValueImage(ValueEmitContext& ctx, const IR::Inst& inst) {
words.push_back(PackedOffset(ctx, mem, *address, layout, view));
}
state.builder.AddFunction(words);
ctx.Define(inst, ResultVector(ctx, sample, integer && !dref, false));
ctx.Define(inst, ResultVector(ctx, sample, integer && !dref, false, mem, true));
return true;
}
const bool explicit_lod = HasFlag(mem, Decoder::ImageSampleFlagDerivative) ||
@@ -509,7 +570,7 @@ bool EmitValueImage(ValueEmitContext& ctx, const IR::Inst& inst) {
};
const auto& image = state.program.info.images[mem.resource];
if (image.indirect_root != mem.resource) {
ctx.Define(inst, ResultVector(ctx, EmitSample(mem.resource), integer, dref));
ctx.Define(inst, ResultVector(ctx, EmitSample(mem.resource), integer, dref, mem));
return true;
}
const auto* handle = image_arg.ResolveInstruction();
@@ -600,7 +661,7 @@ bool EmitValueImage(ValueEmitContext& ctx, const IR::Inst& inst) {
}
EmitLabel(state, merge_label);
state.builder.AddFunction(phi_words);
ctx.Define(inst, ResultVector(ctx, phi_words[2], integer, dref));
ctx.Define(inst, ResultVector(ctx, phi_words[2], integer, dref, mem));
return true;
}
const auto atomic_opcode = ImageAtomicOpcode(op);
src/graphics/shader/recompiler/frontend/decode/ImageOps.cpp
+9 -1
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@@ -310,6 +310,7 @@ void DecodeMimg(uint32_t pc, std::span<const uint32_t> code, uint32_t word_index
const uint32_t srsrc = (word1 >> 16u) & 0x1fu;
const uint32_t ssamp = (word1 >> 21u) & 0x1fu;
const bool a16 = ((word1 >> 30u) & 0x1u) != 0u;
const bool d16 = ((word1 >> 31u) & 0x1u) != 0u;
const auto* sample = LookupSample(opcode);
const auto* gather = LookupGather(opcode);
const auto* atomic = LookupAtomic(opcode);
@@ -321,7 +322,9 @@ void DecodeMimg(uint32_t pc, std::span<const uint32_t> code, uint32_t word_index
inst.opcode_id = opcode;
inst.opcode = DecodeMimgOpcode(opcode, sample, gather, atomic);
inst.dmask = (word0 >> 8u) & 0xfu;
inst.data_dwords = gather != nullptr ? 4u : CountDmaskComponents(inst.dmask);
inst.data_components = gather != nullptr ? 4u : CountDmaskComponents(inst.dmask);
inst.data_bits = d16 ? 16u : 32u;
inst.data_dwords = d16 ? (inst.data_components + 1u) / 2u : inst.data_components;
inst.glc = ((word0 >> 13u) & 1u) != 0;
inst.slc = ((word0 >> 25u) & 1u) != 0;
inst.image_sample_flags = DecodeMimgSampleFlags(sample, gather);
@@ -344,6 +347,11 @@ void DecodeMimg(uint32_t pc, std::span<const uint32_t> code, uint32_t word_index
SetUnsupported(inst, Family::MIMG, opcode,
"MIMG image gather requires exactly one dmask bit");
}
const bool supports_d16 = sample != nullptr || gather != nullptr || opcode == 0x00u ||
opcode == 0x01u || opcode == 0x08u || opcode == 0x09u;
if (d16 && !supports_d16) {
SetUnsupported(inst, Family::MIMG, opcode, "MIMG opcode does not support D16 data");
}
DecodeVectorGpr(vdata, inst.dst);
DecodeVectorGpr(vaddr, inst.src0);
src/graphics/shader/recompiler/frontend/decode/ShaderDecoder.cpp
+3
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@@ -154,6 +154,9 @@ std::string FormatMimg(const Instruction& inst) {
OperandToString(inst.dst).c_str(), OperandToString(inst.src0).c_str(),
OperandToString(inst.src1).c_str(), OperandToString(inst.src2).c_str(),
inst.dmask, ImageDimensionToString(inst.image_dimension));
if (inst.data_bits == 16u) {
text += " d16=1";
}
switch (inst.opcode) {
case Opcode::IMAGE_SAMPLE:
case Opcode::IMAGE_GATHER4_LZ:
src/graphics/shader/recompiler/frontend/decode/ShaderDecoder.h
+1
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@@ -648,6 +648,7 @@ struct Instruction {
uint32_t offset = 0;
uint32_t secondary_offset = 0;
uint32_t dmask = 0;
uint32_t data_components = 0;
uint32_t data_dwords = 1;
uint32_t data_bits = 32;
uint32_t data_format = 0;
src/graphics/shader/recompiler/frontend/translate/Memory.cpp
+16 -8
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@@ -94,9 +94,17 @@ IR::Value Translator::ConstructU32x4(const IR::Operand& base, uint32_t count) {
{components[0], components[1], components[2], components[3]});
}
void Translator::WriteImageComponents(const IR::Operand& dst, IR::Value value, uint32_t dmask,
uint32_t component_limit) {
const auto mask = dmask != 0u ? dmask : 1u;
void Translator::WriteImageComponents(const IR::Operand& dst, IR::Value value,
const IR::MemoryInfo& memory, uint32_t component_limit) {
if (memory.data_bits == 16u) {
for (uint32_t index = 0; index < memory.data_dwords; index++) {
WriteOperand(OffsetOperand(dst, index),
ir.Emit(IR::ValueOpcode::CompositeExtractU32x4,
{value, IR::Value(index)}));
}
return;
}
const auto mask = memory.dmask != 0u ? memory.dmask : 1u;
uint32_t dst_index = 0;
for (uint32_t component = 0; component < component_limit; component++) {
if (((mask >> component) & 1u) == 0u) {
@@ -435,20 +443,20 @@ bool Translator::TranslateImageMemory(const IR::Instruction& inst) {
case IR::Opcode::ImageGetResinfo: {
const auto result =
ir.Emit(IR::ValueOpcode::ImageQueryDimensions, {resource, address}, flags);
WriteImageComponents(inst.dst, result, inst.memory.dmask, 4u);
WriteImageComponents(inst.dst, result, inst.memory, 4u);
return true;
}
case IR::Opcode::ImageGetLod: {
const auto sampler = GetSamplerResource(inst.memory);
const auto result =
ir.Emit(IR::ValueOpcode::ImageQueryLod, {resource, sampler, address}, flags);
WriteImageComponents(inst.dst, result, inst.memory.dmask, 2u);
WriteImageComponents(inst.dst, result, inst.memory, 2u);
return true;
}
case IR::Opcode::ImageLoad: {
const auto result =
ir.Emit(IR::ValueOpcode::ImageRead, {resource, address, ir.GetExec()}, flags);
WriteImageComponents(inst.dst, result, inst.memory.dmask, 4u);
WriteImageComponents(inst.dst, result, inst.memory, 4u);
return true;
}
case IR::Opcode::ImageStore: {
@@ -465,7 +473,7 @@ bool Translator::TranslateImageMemory(const IR::Instruction& inst) {
const auto result = ir.Emit(opcode, {resource, sampler, address}, flags);
const bool dref =
(inst.memory.image_sample_flags & Decoder::ImageSampleFlagCompare) != 0u;
if (inst.op == IR::Opcode::ImageSample && dref) {
if (inst.op == IR::Opcode::ImageSample && dref && inst.memory.data_bits != 16u) {
const auto component =
ir.Emit(IR::ValueOpcode::CompositeExtractU32x4, {result, IR::Value(0u)});
for (uint32_t index = 0; index < inst.memory.data_dwords; index++) {
@@ -478,7 +486,7 @@ bool Translator::TranslateImageMemory(const IR::Instruction& inst) {
{result, IR::Value(index)}));
}
} else {
WriteImageComponents(inst.dst, result, inst.memory.dmask, 4u);
WriteImageComponents(inst.dst, result, inst.memory, 4u);
}
return true;
}
src/graphics/shader/recompiler/frontend/translate/Translator.h
+2 -2
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@@ -75,8 +75,8 @@ private:
IR::Value GetSamplerResource(const IR::MemoryInfo& memory);
IR::Value MakeImageAddress(const IR::Instruction& inst, const IR::Operand& base);
IR::Value ConstructU32x4(const IR::Operand& base, uint32_t count);
void WriteImageComponents(const IR::Operand& dst, IR::Value value, uint32_t dmask,
uint32_t component_limit);
void WriteImageComponents(const IR::Operand& dst, IR::Value value,
const IR::MemoryInfo& memory, uint32_t component_limit);
IR::ValueOpcode ImageAtomicOpcode(IR::Opcode opcode);
BufferAddress ReadBufferAddress(const IR::Instruction& inst, uint32_t source_offset);
IR::U32 WidenSubdword(IR::Value value, uint32_t bits, bool sign);
src/graphics/shader/recompiler/ir/ShaderIR.cpp
+2 -1
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@@ -211,7 +211,8 @@ MemoryInfo MemoryInfoFromDecoded(const Decoder::Instruction& decoded, ResourceKi
mem.dmask = decoded.dmask;
mem.data_dwords = decoded.data_dwords;
mem.data_bits = decoded.data_bits;
mem.component_count = decoded.data_dwords;
mem.component_count = decoded.data_components != 0u ? decoded.data_components
: decoded.data_dwords;
mem.data_format = decoded.data_format;
mem.number_format = decoded.number_format;
mem.image_sample_flags = decoded.image_sample_flags;