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Print warning when attempting to use swizzling in outmask

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oreo639 2023-10-04 23:25:47 -07:00 committed by fincs
parent 82cf7d95fe
commit d522455ea5
1 changed files with 4 additions and 0 deletions
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4
source/picasso_assembler.cpp
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@ -548,9 +548,13 @@ static int maskFromSwizzling(int sw, bool reverse = true)
{
sw >>= 1; // get rid of negation bit
int out = 0;
int prevbitid = 4;
for (int i = 0; i < 4; i ++)
{
int bitid = (sw>>(i*2))&3;
if (bitid > prevbitid)
fprintf(stderr, "%s:%d: warning: arbitrary swizzling has no effect for destination mask\n", curFile, curLine);
prevbitid=bitid;
if (reverse) bitid = 3 - bitid;
out |= BIT(bitid);
}