From a287ab2020f0b657d3cebfe5676fcacbe17e585c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marek=20Ol=C5=A1=C3=A1k?= <marek.olsak@amd.com>
Date: Thu, 19 Nov 2020 01:08:33 -0500
Subject: [PATCH] radeonsi: use util_logbase2 instead of division by index_size

Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7721>
---
 src/gallium/drivers/radeonsi/si_state_draw.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/gallium/drivers/radeonsi/si_state_draw.c b/src/gallium/drivers/radeonsi/si_state_draw.c
index 5390672f2fc..f3c88dde610 100644
--- a/src/gallium/drivers/radeonsi/si_state_draw.c
+++ b/src/gallium/drivers/radeonsi/si_state_draw.c
@@ -862,7 +862,7 @@ static void si_emit_draw_packets(struct si_context *sctx, const struct pipe_draw
       }
 
       if (original_index_size) {
-         index_max_size = (indexbuf->width0 - index_offset) / original_index_size;
+         index_max_size = (indexbuf->width0 - index_offset) >> util_logbase2(original_index_size);
          /* Skip draw calls with 0-sized index buffers.
           * They cause a hang on some chips, like Navi10-14.
           */