Mesa (main): util/prim_restart: use more direct conversion for restart index
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Mon Jun 14 22:53:04 UTC 2021
Module: Mesa
Branch: main
Commit: 14ab4e9a9b24e14a1f54aefa0d6835319ad7e0f3
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=14ab4e9a9b24e14a1f54aefa0d6835319ad7e0f3
Author: Mike Blumenkrantz <michael.blumenkrantz at gmail.com>
Date: Mon Jun 14 15:20:58 2021 -0400
util/prim_restart: use more direct conversion for restart index
Reviewed-by: Marek Olšák <marek.olsak at amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11363>
---
src/gallium/auxiliary/util/u_prim_restart.h | 10 ++--------
1 file changed, 2 insertions(+), 8 deletions(-)
diff --git a/src/gallium/auxiliary/util/u_prim_restart.h b/src/gallium/auxiliary/util/u_prim_restart.h
index 453c1281d8d..e4c8b6fd29f 100644
--- a/src/gallium/auxiliary/util/u_prim_restart.h
+++ b/src/gallium/auxiliary/util/u_prim_restart.h
@@ -63,14 +63,8 @@ util_draw_vbo_without_prim_restart(struct pipe_context *context,
static inline unsigned
util_prim_restart_index_from_size(unsigned index_size)
{
- if (index_size == 1)
- return 0xff;
- if (index_size == 2)
- return 0xffff;
- if (index_size == 4)
- return 0xffffffff;
- unreachable("unknown index size passed");
- return 0;
+ /* 1 -> 0xff, 2 -> 0xffff, 4 -> 0xffffffff */
+ return 0xffffffffu >> 8 * (4 - index_size);
}
#ifdef __cplusplus
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