diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2013-10-08 09:40:34 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2013-10-08 09:40:34 +0100 |
| commit | 082c08789cf9a8c0cc2bf44d0fee579b96c0798f (patch) | |
| tree | 85e06a4aeacef4cc54dd8dccad088d910d8be3c7 /src/sna/sna_trapezoids_imprecise.c | |
| parent | 06a8ad9690590a605b1564012d062b98c60546a6 (diff) | |
sna: Rework the num_threads refinement to avoid the division
We can replace the division by a multiplication.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'src/sna/sna_trapezoids_imprecise.c')
| -rw-r--r-- | src/sna/sna_trapezoids_imprecise.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/sna/sna_trapezoids_imprecise.c b/src/sna/sna_trapezoids_imprecise.c index 4809e9cc..3624dd63 100644 --- a/src/sna/sna_trapezoids_imprecise.c +++ b/src/sna/sna_trapezoids_imprecise.c @@ -1982,7 +1982,7 @@ imprecise_trapezoid_span_converter(struct sna *sna, y = clip.extents.y1; h = clip.extents.y2 - clip.extents.y1; h = (h + num_threads - 1) / num_threads; - num_threads = (clip.extents.y2 - clip.extents.y1 + h - 1) / h; + num_threads -= (num_threads-1) * h >= clip.extents.y2 - clip.extents.y1; for (n = 1; n < num_threads; n++) { threads[n] = threads[0]; @@ -2841,7 +2841,7 @@ trapezoid_span_inplace__x8r8g8b8(CARD8 op, y = region.extents.y1; h = region.extents.y2 - region.extents.y1; h = (h + num_threads - 1) / num_threads; - num_threads = (region.extents.y2 - region.extents.y1 + h - 1) / h; + num_threads -= (num_threads-1) * h >= region.extents.y2 - region.extents.y1; for (n = 1; n < num_threads; n++) { threads[n] = threads[0]; @@ -3112,7 +3112,7 @@ imprecise_trapezoid_span_inplace(struct sna *sna, y = region.extents.y1; h = region.extents.y2 - region.extents.y1; h = (h + num_threads - 1) / num_threads; - num_threads = (region.extents.y2 - region.extents.y1 + h - 1) / h; + num_threads -= (num_threads-1) * h >= region.extents.y2 - region.extents.y1; for (n = 1; n < num_threads; n++) { threads[n] = threads[0]; |