9 lines
355 B
GLSL
9 lines
355 B
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;
|
|
} |