40141ffddf
Based on CTS testing, math optimizations between MSL and Vulkan are inconsistent. In some cases, enabling MSL's fast-math compilation option matches Vulkan's math results. In other cases, disabling it does. Broadly enabling or disabling fast-math across all shaders results in some CTS test failures either way. To fix this, selectively enable/disable fast-math optimizations in the MSL code, using metal::fast and metal::precise function namespaces, where supported, and the [[clang::optnone]] function attribute otherwise. Adjust SPIRV-Cross unit test reference shaders to accommodate these changes.
46 lines
914 B
GLSL
46 lines
914 B
GLSL
#include <metal_stdlib>
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#include <simd/simd.h>
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using namespace metal;
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struct Light
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{
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packed_float3 Position;
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float Radius;
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float4 Color;
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};
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struct UBO
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{
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float4x4 uMVP;
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Light lights[4];
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};
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struct main0_out
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{
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float4 vColor [[user(locn0)]];
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float4 gl_Position [[position]];
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};
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struct main0_in
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{
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float4 aVertex [[attribute(0)]];
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float3 aNormal [[attribute(1)]];
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};
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vertex main0_out main0(main0_in in [[stage_in]], constant UBO& _21 [[buffer(0)]])
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{
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main0_out out = {};
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out.gl_Position = _21.uMVP * in.aVertex;
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out.vColor = float4(0.0);
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for (int _82 = 0; _82 < 4; )
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{
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float3 _54 = in.aVertex.xyz - float3(_21.lights[_82].Position);
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out.vColor += ((_21.lights[_82].Color * fast::clamp(1.0 - (length(_54) / _21.lights[_82].Radius), 0.0, 1.0)) * dot(in.aNormal, fast::normalize(_54)));
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_82++;
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continue;
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}
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return out;
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}
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