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OpenMP for Transpose. Questionable Benefit

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wiredfool 2014-11-17 22:11:58 -08:00 committed by Eric Soroos
parent e4903e2abe
commit 0c9269d6e8
1 changed files with 6 additions and 3 deletions
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9
libImaging/Geometry.c
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@ -5,6 +5,7 @@
Rotating in chunks that fit in the cache can speed up rotation
8x on a modern CPU. A chunk size of 128 requires only 65k and is large enough
that the overhead from the extra loops are not apparent. */
#define ROTATE_CHUNK 512
#define ROTATE_SMALL_CHUNK 8
@ -163,11 +164,13 @@ ImagingTranspose(Imaging imOut, Imaging imIn)
ImagingSectionEnter(&cookie);
if (imIn->image8)
if (imIn->image8){
#pragma omp parallel for private(x,y,xx,yy,yysize,xxsize) shared(imIn,imOut) default(none) collapse(2)
TRANSPOSE(UINT8, image8)
else
} else {
#pragma omp parallel for private(x,y,xx,yy,yysize,xxsize) shared(imIn,imOut) default(none) collapse(2)
TRANSPOSE(INT32, image32)
}
ImagingSectionLeave(&cookie);
#undef TRANSPOSE