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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/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
View File
@@ -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;