Ryujinx/Ryujinx.Graphics.Shader/CodeGen/Glsl/HelperFunctions/ShuffleUp.glsl
gdkchan 416dc8fde4
Fix out-of-bounds shader thread shuffle (#2605)
* Fix out-of-bounds shader thread shuffle

* Shader cache version bump
2021-08-30 14:02:40 -03:00

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GLSL

float Helper_ShuffleUp(float x, uint index, uint mask, out bool valid)
{
uint segMask = (mask >> 8) & 0x1fu;
uint minThreadId = gl_SubGroupInvocationARB & segMask;
uint srcThreadId = gl_SubGroupInvocationARB - index;
valid = int(srcThreadId) >= int(minThreadId);
float v = readInvocationARB(x, srcThreadId);
return valid ? v : x;
}