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swiftshader
Commit 6caf821a by Ben Clayton
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SpirvShader: Implement GLSLstd450Fma

Bug: b/126873455 Tests: dEQP-VK.glsl.builtin.function.common.fma.* Change-Id: I00e890a6a051b45bc552944ec5364f070ee3a768 Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/28629Tested-by: 's avatarBen Clayton <bclayton@google.com> Reviewed-by: 's avatarNicolas Capens <nicolascapens@google.com> Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
parent fc77af18
Showing with 20 additions and 0 deletions
src/Pipeline/SpirvShader.cpp
...@@ -50,6 +50,15 @@ namespace ...@@ -50,6 +50,15 @@ namespace
{ {
return NthBit32(bitCount) - sw::SIMD::UInt(1); return NthBit32(bitCount) - sw::SIMD::UInt(1);
} }
// Performs a fused-multiply add, returning a * b + c.
rr::RValue<sw::SIMD::Float> FMA(
rr::RValue<sw::SIMD::Float> const &a,
rr::RValue<sw::SIMD::Float> const &b,
rr::RValue<sw::SIMD::Float> const &c)
{
return a * b + c;
}
} }
namespace sw namespace sw
...@@ -3179,6 +3188,17 @@ namespace sw ...@@ -3179,6 +3188,17 @@ namespace sw
dst.move(1, HalfToFloatBits((val.UInt(0) & SIMD::UInt(0xFFFF0000)) >> 16)); dst.move(1, HalfToFloatBits((val.UInt(0) & SIMD::UInt(0xFFFF0000)) >> 16));
break; break;
} }
case GLSLstd450Fma:
{
auto a = GenericValue(this, routine, insn.word(5));
auto b = GenericValue(this, routine, insn.word(6));
auto c = GenericValue(this, routine, insn.word(7));
for (auto i = 0u; i < type.sizeInComponents; i++)
{
dst.move(i, FMA(a.Float(i), b.Float(i), c.Float(i)));
}
break;
}
case GLSLstd450Frexp: case GLSLstd450Frexp:
{ {
auto val = GenericValue(this, routine, insn.word(5)); auto val = GenericValue(this, routine, insn.word(5));
......
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