From: Akinobu Mita <akinobu.mita@gmail.com>
To: linux-kernel@vger.kernel.org, akpm@linux-foundation.org
Cc: Akinobu Mita <akinobu.mita@gmail.com>,
David Airlie <airlied@linux.ie>,
dri-devel@lists.freedesktop.org
Subject: [PATCH] drm/radeon: Use hweight32
Date: Fri, 9 Nov 2012 21:10:41 +0900 [thread overview]
Message-ID: <1352463043-9408-1-git-send-email-akinobu.mita@gmail.com> (raw)
Use hweight32 instead of counting for each bit
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: David Airlie <airlied@linux.ie>
Cc: dri-devel@lists.freedesktop.org
---
drivers/gpu/drm/radeon/r600.c | 8 +-------
drivers/gpu/drm/radeon/r600_cp.c | 7 +------
2 files changed, 2 insertions(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index cda280d..169ecc9 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -1424,13 +1424,7 @@ u32 r6xx_remap_render_backend(struct radeon_device *rdev,
int r600_count_pipe_bits(uint32_t val)
{
- int i, ret = 0;
-
- for (i = 0; i < 32; i++) {
- ret += val & 1;
- val >>= 1;
- }
- return ret;
+ return hweight32(val);
}
static void r600_gpu_init(struct radeon_device *rdev)
diff --git a/drivers/gpu/drm/radeon/r600_cp.c b/drivers/gpu/drm/radeon/r600_cp.c
index 2514123..be85f75 100644
--- a/drivers/gpu/drm/radeon/r600_cp.c
+++ b/drivers/gpu/drm/radeon/r600_cp.c
@@ -721,12 +721,7 @@ static u32 r600_get_tile_pipe_to_backend_map(u32 num_tile_pipes,
static int r600_count_pipe_bits(uint32_t val)
{
- int i, ret = 0;
- for (i = 0; i < 32; i++) {
- ret += val & 1;
- val >>= 1;
- }
- return ret;
+ return hweight32(val);
}
static void r600_gfx_init(struct drm_device *dev,
--
1.7.11.7
next reply other threads:[~2012-11-09 12:11 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-09 12:10 Akinobu Mita [this message]
2012-11-09 12:10 ` [PATCH] drm: use memchr_inv() Akinobu Mita
2012-11-09 12:10 ` [PATCH] drm/ttm: remove unneeded preempt_disable/enable Akinobu Mita
2012-11-14 8:54 ` Thomas Hellstrom
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