Module: Mesa Branch: lp-binning Commit: 12ba9e99db51a4a9e2e28a0574ef59f6548d8a84 URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=12ba9e99db51a4a9e2e28a0574ef59f6548d8a84
Author: Brian Paul <[email protected]> Date: Fri Jan 15 11:26:35 2010 -0700 llvmpipe: added comment about lookup-tables vs. computation --- src/gallium/drivers/llvmpipe/lp_rast_tri.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/src/gallium/drivers/llvmpipe/lp_rast_tri.c b/src/gallium/drivers/llvmpipe/lp_rast_tri.c index 9c3f699..92769be 100644 --- a/src/gallium/drivers/llvmpipe/lp_rast_tri.c +++ b/src/gallium/drivers/llvmpipe/lp_rast_tri.c @@ -40,6 +40,9 @@ * Map an index in [0,15] to an x,y position, multiplied by 4. * This is used to get the position of each subtile in a 4x4 * grid of edge step values. + * Note: we can use some bit twiddling to compute these values instead + * of using a look-up table, but there's no measurable performance + * difference. */ static const int pos_table4[16][2] = { { 0, 0 }, _______________________________________________ mesa-commit mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/mesa-commit
