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Unpack Snorm 2x16

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Mahmoud Adel 2025-04-25 01:51:23 +03:00 committed by GitHub
parent 31bd2c639d
commit cee375fd3e
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1 changed files with 10 additions and 0 deletions
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src/shader_recompiler/backend/spirv/emit_spirv_bitwise_conversion.cpp
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@ -108,6 +108,16 @@ Id EmitUnpackSnorm2x16(EmitContext& ctx, Id value) {
return ctx.OpUnpackSnorm2x16(ctx.F32[2], value);
}
Id EmitUnpackSnormNz2x16(EmitContext& ctx, Id value) {
const auto [x, y] = ExtractBitFields<true>(ctx, value, R(0, 16), R(16, 16));
const auto unpacked{ctx.OpCompositeConstruct(ctx.S32[2], x, y)};
constexpr s32 N = std::numeric_limits<u16>::max();
const Id numerator = ctx.OpIAdd(ctx.S32[2], unpacked, ctx.ConstS32(N / 2, N / 2));
const Id denom = ctx.ConstS32(N - 1, N - 1);
const Id result = ctx.OpConvertSToF(ctx.F32[2], ctx.OpUDiv(ctx.S32[2], numerator, denom));
return ctx.OpFma(ctx.F32[2], result, ctx.ConstF32(2.0f, 2.0f), ctx.ConstF32(-1.0f, -1.0f));
}
Id EmitPackUint2x16(EmitContext& ctx, Id value) {
const auto unpacked{ctx.OpBitcast(ctx.U32[2], value)};
const auto [x, y] = ExtractComposite<2>(ctx, ctx.U32, unpacked);