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shader: elide bitcasts between identical physical types

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This commit is contained in:
nmzik
2026-10-13 00:53:23 +02:00
parent 7e884f55e0
commit 2f88a0a3b2
2 changed files with 23 additions and 6 deletions
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src/graphics/shader/recompiler/backend/spirv/spirvEmitterInstructions.h
+4 -3
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@@ -5,15 +5,17 @@
#include <bit>
namespace Libs::Graphics::ShaderRecompiler::Spirv::Emitter {
uint32_t EmitIdentity(ValueEmitContext& ctx, uint32_t value);
// Operand signatures distinguish SPIR-V IDs (uint32_t), raw literals/values
// (IR::Value), and instructions whose metadata or operand loads must stay lazy.
#define EMIT_NATIVE(name, opcode, type, ...) \
inline constexpr auto Emit##name = EmitNative<spv::opcode, IR::Type::type, __VA_ARGS__>;
EMIT_NATIVE(BitCastU16F16, OpBitcast, U32, uint32_t)
inline constexpr auto EmitBitCastU16F16 = EmitIdentity;
inline constexpr auto EmitBitCastF16U16 = EmitBitCastU16F16;
inline constexpr auto EmitConvertU32U16 = EmitBitCastU16F16;
inline constexpr auto EmitConvertU32U8 = EmitBitCastU16F16;
inline constexpr auto EmitBitCastU32F32 = EmitBitCastU16F16;
EMIT_NATIVE(BitCastU32F32, OpBitcast, U32, uint32_t)
EMIT_NATIVE(BitCastF32U32, OpBitcast, F32, uint32_t)
EMIT_NATIVE(BitCastU64F64, OpBitcast, U64, uint32_t)
EMIT_NATIVE(BitCastF64U64, OpBitcast, F64, uint32_t)
@@ -207,7 +209,6 @@ uint32_t EmitFPSin(EmitterState& state, uint32_t arg0);
uint32_t EmitFPCos(EmitterState& state, uint32_t arg0);
#undef EMIT_NATIVE
uint32_t EmitIdentity(ValueEmitContext& ctx, uint32_t value);
void EmitVoid(ValueEmitContext&);
inline constexpr auto EmitReference = EmitVoid;
inline constexpr auto EmitReferenceU32 = EmitVoid;