llvmpipe: improve the in/out test a little

Instead of:
  s = c + step
  m = s > 0
Do:
  m = step > c  (with negated c)

1 files changed, 2 insertions, 2 deletions

diff --git a/src/gallium/drivers/llvmpipe/lp_rast_tri.c b/src/gallium/drivers/llvmpipe/lp_rast_tri.c
index 9b1861223a..d6e8d6d5ab 100644
--- a/src/gallium/drivers/llvmpipe/lp_rast_tri.c
+++ b/src/gallium/drivers/llvmpipe/lp_rast_tri.c
@@ -90,7 +90,7 @@ block_full_4( struct lp_rasterizer_task *rast_task,
               int x, int y )
 {
    /* Set c1,c2,c3 to large values so the in/out test always passes */
-   const int32_t c1 = INT_MAX/2, c2 = INT_MAX/2, c3 = INT_MAX/2;
+   const int32_t c1 = INT_MIN/2, c2 = INT_MIN/2, c3 = INT_MIN/2;
    lp_rast_shade_quads(rast_task->rast,
                        rast_task->thread_index,
                        &tri->inputs, 
@@ -133,7 +133,7 @@ do_block_4( struct lp_rasterizer_task *rast_task,
                        rast_task->thread_index,
                        &tri->inputs, 
                        x, y,
-                       c1, c2, c3);
+                       -c1, -c2, -c3);
 }