27af716c3a
This roughly matches their semantics in SPIR-V and MSL. For `FMin`,
`FMax`, and `FClamp`, and the Metal functions `fast::min()`,
`fast::max()`, and `fast::clamp()`, the result is undefined if any
operand is NaN. For the 'N' operations and their corresponding MSL
`precise::` functions, the result is consistent with IEEE 754 (first
non-NaN wins; result is NaN if all operands are NaN).
We can only do this with 32-bit floats, though, because Metal only
provides these variants for `float`. `half` only has one variant of
these functions that is presumably consistent with IEEE 754. I guess
that's OK; the SPIR-V spec only says that `F{Min,Max,Clamp}` are
undefined for NaNs. Performance might suffer, though.
70 lines
2.2 KiB
GLSL
70 lines
2.2 KiB
GLSL
#include <metal_stdlib>
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#include <simd/simd.h>
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using namespace metal;
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struct main0_in
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{
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float v1 [[user(locn0)]];
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float2 v2 [[user(locn1)]];
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float3 v3 [[user(locn2)]];
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float4 v4 [[user(locn3)]];
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half h1 [[user(locn4)]];
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half2 h2 [[user(locn5)]];
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half3 h3 [[user(locn6)]];
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half4 h4 [[user(locn7)]];
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};
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fragment void main0(main0_in in [[stage_in]])
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{
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float res = fast::min(in.v1, in.v1);
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res = fast::max(in.v1, in.v1);
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res = fast::clamp(in.v1, in.v1, in.v1);
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res = precise::min(in.v1, in.v1);
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res = precise::max(in.v1, in.v1);
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res = precise::clamp(in.v1, in.v1, in.v1);
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float2 res2 = fast::min(in.v2, in.v2);
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res2 = fast::max(in.v2, in.v2);
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res2 = fast::clamp(in.v2, in.v2, in.v2);
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res2 = precise::min(in.v2, in.v2);
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res2 = precise::max(in.v2, in.v2);
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res2 = precise::clamp(in.v2, in.v2, in.v2);
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float3 res3 = fast::min(in.v3, in.v3);
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res3 = fast::max(in.v3, in.v3);
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res3 = fast::clamp(in.v3, in.v3, in.v3);
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res3 = precise::min(in.v3, in.v3);
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res3 = precise::max(in.v3, in.v3);
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res3 = precise::clamp(in.v3, in.v3, in.v3);
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float4 res4 = fast::min(in.v4, in.v4);
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res4 = fast::max(in.v4, in.v4);
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res4 = fast::clamp(in.v4, in.v4, in.v4);
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res4 = precise::min(in.v4, in.v4);
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res4 = precise::max(in.v4, in.v4);
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res4 = precise::clamp(in.v4, in.v4, in.v4);
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half hres = min(in.h1, in.h1);
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hres = max(in.h1, in.h1);
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hres = clamp(in.h1, in.h1, in.h1);
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hres = min(in.h1, in.h1);
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hres = max(in.h1, in.h1);
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hres = clamp(in.h1, in.h1, in.h1);
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half2 hres2 = min(in.h2, in.h2);
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hres2 = max(in.h2, in.h2);
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hres2 = clamp(in.h2, in.h2, in.h2);
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hres2 = min(in.h2, in.h2);
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hres2 = max(in.h2, in.h2);
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hres2 = clamp(in.h2, in.h2, in.h2);
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half3 hres3 = min(in.h3, in.h3);
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hres3 = max(in.h3, in.h3);
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hres3 = clamp(in.h3, in.h3, in.h3);
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hres3 = min(in.h3, in.h3);
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hres3 = max(in.h3, in.h3);
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hres3 = clamp(in.h3, in.h3, in.h3);
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half4 hres4 = min(in.h4, in.h4);
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hres4 = max(in.h4, in.h4);
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hres4 = clamp(in.h4, in.h4, in.h4);
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hres4 = min(in.h4, in.h4);
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hres4 = max(in.h4, in.h4);
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hres4 = clamp(in.h4, in.h4, in.h4);
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}
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