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Avoid dynamic branches when loading array constants.

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This commit is contained in:
Skyth 2024-11-20 23:17:28 +03:00
parent 11128441c6
commit 31513fbfbb
1 changed files with 8 additions and 3 deletions
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11
ShaderRecomp/shader_recompiler.cpp
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@ -1130,8 +1130,10 @@ void ShaderRecompiler::recompile(const uint8_t* shaderData, const std::string_vi
if (constantInfo->registerCount > 1) if (constantInfo->registerCount > 1)
{ {
println("#define {}(INDEX) ((INDEX) < {} ? vk::RawBufferLoad<float4>(g_PushConstants.{}ShaderConstants + ({} + (INDEX)) * 16, 0x10) : 0.0)", uint32_t tailCount = (isPixelShader ? 224 : 256) - constantInfo->registerIndex;
constantName, constantInfo->registerCount.get(), shaderName, constantInfo->registerIndex.get());
println("#define {}(INDEX) select((INDEX) < {}, vk::RawBufferLoad<float4>(g_PushConstants.{}ShaderConstants + ({} + min(INDEX, {})) * 16, 0x10), 0.0)",
constantName, tailCount, shaderName, constantInfo->registerIndex.get(), tailCount - 1);
} }
else else
{ {
@ -1185,7 +1187,10 @@ void ShaderRecompiler::recompile(const uint8_t* shaderData, const std::string_vi
println(" : packoffset(c{});", constantInfo->registerIndex.get()); println(" : packoffset(c{});", constantInfo->registerIndex.get());
if (constantInfo->registerCount > 1) if (constantInfo->registerCount > 1)
println("#define {0}(INDEX) ((INDEX) < {1} ? {0}[INDEX] : 0.0)", constantName, constantInfo->registerCount.get()); {
uint32_t tailCount = (isPixelShader ? 224 : 256) - constantInfo->registerIndex;
println("#define {0}(INDEX) select((INDEX) < {1}, {0}[min(INDEX, {2})], 0.0)", constantName, tailCount, tailCount - 1);
}
} }
} }