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Implement SnormNz conversion (#2841)

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* +

* +

* Unpack Snorm 2x16

* +

* SintToSnormNz

* all is broken ig....

* review changes

* my stupid ass messed all while trying to resolve the conflicts..

* +

* +

* fix rebase

* clang-format fix (1)

* clang-format fix (2)

---------

Co-authored-by: squidbus <175574877+squidbus@users.noreply.github.com>
This commit is contained in:
Mahmoud Adel 2025-05-01 12:12:15 +03:00 • committed by GitHub
parent 4202d9d621
commit b0e4e87ff3
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6 changed files with 50 additions and 6 deletions
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26
src/shader_recompiler/ir/reinterpret.h
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@ -34,6 +34,18 @@ inline F32 ApplyReadNumberConversion(IREmitter& ir, const F32& value,
case AmdGpu::NumberConversion::UnormToUbnorm:
// Convert 0...1 to -1...1
return ir.FPSub(ir.FPMul(value, ir.Imm32(2.f)), ir.Imm32(1.f));
case AmdGpu::NumberConversion::Sint8ToSnormNz: {
const IR::U32 additon = ir.IAdd(ir.IMul(ir.BitCast<U32>(value), ir.Imm32(2)), ir.Imm32(1));
const IR::F32 left = ir.ConvertSToF(32, 32, additon);
const IR::F32 max = ir.Imm32(float(std::numeric_limits<u8>::max()));
return ir.FPDiv(left, max);
}
case AmdGpu::NumberConversion::Sint16ToSnormNz: {
const IR::U32 additon = ir.IAdd(ir.IMul(ir.BitCast<U32>(value), ir.Imm32(2)), ir.Imm32(1));
const IR::F32 left = ir.ConvertSToF(32, 32, additon);
const IR::F32 max = ir.Imm32(float(std::numeric_limits<u16>::max()));
return ir.FPDiv(left, max);
}
default:
UNREACHABLE();
}
@ -66,6 +78,20 @@ inline F32 ApplyWriteNumberConversion(IREmitter& ir, const F32& value,
case AmdGpu::NumberConversion::UnormToUbnorm:
// Convert -1...1 to 0...1
return ir.FPDiv(ir.FPAdd(value, ir.Imm32(1.f)), ir.Imm32(2.f));
case AmdGpu::NumberConversion::Sint8ToSnormNz: {
const IR::F32 max = ir.Imm32(float(std::numeric_limits<u8>::max()));
const IR::F32 mul = ir.FPMul(ir.FPClamp(value, ir.Imm32(-1.f), ir.Imm32(1.f)), max);
const IR::F32 left = ir.FPSub(mul, ir.Imm32(1.f));
const IR::U32 raw = ir.ConvertFToS(32, ir.FPDiv(left, ir.Imm32(2.f)));
return ir.BitCast<F32>(raw);
}
case AmdGpu::NumberConversion::Sint16ToSnormNz: {
const IR::F32 max = ir.Imm32(float(std::numeric_limits<u16>::max()));
const IR::F32 mul = ir.FPMul(ir.FPClamp(value, ir.Imm32(-1.f), ir.Imm32(1.f)), max);
const IR::F32 left = ir.FPSub(mul, ir.Imm32(1.f));
const IR::U32 raw = ir.ConvertFToS(32, ir.FPDiv(left, ir.Imm32(2.f)));
return ir.BitCast<F32>(raw);
}
default:
UNREACHABLE();
}