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Replace a few mod-by-power-of-2 operations with bit masking, since ORCA/C wasn't optimizing them

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This commit is contained in:
Stephen Heumann 2015-09-26 00:33:08 -05:00
parent 8ee57096d2
commit 8861cb4a3a
1 changed files with 3 additions and 3 deletions
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6
mouse.cc
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@ -234,7 +234,7 @@ void DoCursor (void) {
*(imageLine + n) ^= 0xFF; /* Reverse color */
*(imageLine + n) &= *(maskLine + n);
}
if (rectWidth % 2) {
if (rectWidth & 0x01) {
*(imageLine + n) = coltab320[*(dataPtr++)] & 0xF0;
*(imageLine + n) ^= 0xFF; /* Reverse color */
*(imageLine + n) &= *(maskLine + n);
@ -270,9 +270,9 @@ void DoCursor (void) {
*(imageLine + n) &= *(maskLine + n);
}
if (rectWidth % 4) {
if (rectWidth & 0x03) {
*(imageLine + n) = 0;
for (j = 0; j < rectWidth % 4; j++) {
for (j = 0; j < (rectWidth & 0x03); j++) {
*(imageLine + n) += coltab640[*(dataPtr++)] & (0xC0 >> j*2);
}
*(imageLine + n) ^= 0xFF; /* Reverse color */