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Ryujinx/Ryujinx.Graphics.Shader/CodeGen/Glsl/HelperFunctions/SwizzleAdd.glsl
gdkchan f08a280ade
Use shader subgroup extensions if shader ballot is not supported (#2627)
* Use shader subgroup extensions if shader ballot is not supported

* Shader cache version bump + cleanup

* The type is still required on the table
2021-09-19 14:38:39 +02:00

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GLSL

float Helper_SwizzleAdd(float x, float y, int mask)
{
vec4 xLut = vec4(1.0, -1.0, 1.0, 0.0);
vec4 yLut = vec4(1.0, 1.0, -1.0, 1.0);
int lutIdx = mask >> int($SUBGROUP_INVOCATION$ & 3u) * 2;
return x * xLut[lutIdx] + y * yLut[lutIdx];
}