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| author | Brian Paul <brianp@vmware.com> | 2009-12-01 16:24:16 -0700 |
|---|---|---|
| committer | Brian Paul <brianp@vmware.com> | 2009-12-01 16:24:19 -0700 |
| commit | 9c486774913f66c6496cd43cfd9dbd992c28d8cb (patch) | |
| tree | d2d5c262d85f2fd6697a5b553c6c94fe5bc65f81 | |
| parent | 6bde3e0fdfe4bfc3fee33ca0d1d8e13969eb8952 (diff) | |
llvmpipe: simplify mask computation
Make this a little easier to understand.
| -rw-r--r-- | src/gallium/drivers/llvmpipe/lp_rast_tri.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_rast_tri.c b/src/gallium/drivers/llvmpipe/lp_rast_tri.c index 9543b86ecd..f6cb628ed4 100644 --- a/src/gallium/drivers/llvmpipe/lp_rast_tri.c +++ b/src/gallium/drivers/llvmpipe/lp_rast_tri.c @@ -89,10 +89,12 @@ do_block_4( struct lp_rasterizer *rast, assert(x % 4 == 0); assert(y % 4 == 0); - for (i = 0; i < 16; i++) - mask |= (~(((c1 + tri->step[0][i]) | - (c2 + tri->step[1][i]) | - (c3 + tri->step[2][i])) >> 31)) & (1 << i); + for (i = 0; i < 16; i++) { + int any_negative = ((c1 + tri->step[0][i]) | + (c2 + tri->step[1][i]) | + (c3 + tri->step[2][i])) >> 31; + mask |= (~any_negative) & (1 << i); + } /* As we do trivial reject already, masks should rarely be all zero: */ |