Module: Mesa
Branch: master
Commit: 1e105741f1e0ae4946febb41c844ed5741a54ec1
URL:
http://cgit.freedesktop.org/mesa/mesa/commit/?id=1e105741f1e0ae4946febb41c844ed5741a54ec1
Author: Brian Paul <bri...@vmware.com>
Date: Thu Apr 7 13:41:52 2011 -0600
util: simplify bit shifting in util_cpu_detect()
---
src/gallium/auxiliary/util/u_cpu_detect.c | 22 +++++++++++-----------
1 files changed, 11 insertions(+), 11 deletions(-)
diff --git a/src/gallium/auxiliary/util/u_cpu_detect.c
b/src/gallium/auxiliary/util/u_cpu_detect.c
index 32519b1..c9d5a9e 100644
--- a/src/gallium/auxiliary/util/u_cpu_detect.c
+++ b/src/gallium/auxiliary/util/u_cpu_detect.c
@@ -270,13 +270,13 @@ util_cpu_detect(void)
util_cpu_caps.x86_cpu_type = 8 + ((regs2[0] >> 20) & 255); /* use
extended family (P4, IA64) */
/* general feature flags */
- util_cpu_caps.has_tsc = (regs2[3] & (1 << 8 )) >> 8; /*
0x0000010 */
- util_cpu_caps.has_mmx = (regs2[3] & (1 << 23 )) >> 23; /*
0x0800000 */
- util_cpu_caps.has_sse = (regs2[3] & (1 << 25 )) >> 25; /*
0x2000000 */
- util_cpu_caps.has_sse2 = (regs2[3] & (1 << 26 )) >> 26; /*
0x4000000 */
- util_cpu_caps.has_sse3 = (regs2[2] & (1)); /* 0x0000001 */
- util_cpu_caps.has_ssse3 = (regs2[2] & (1 << 9 )) >> 9; /*
0x0000020 */
- util_cpu_caps.has_sse4_1 = (regs2[2] & (1 << 19)) >> 19;
+ util_cpu_caps.has_tsc = (regs2[3] >> 8) & 1; /* 0x0000010 */
+ util_cpu_caps.has_mmx = (regs2[3] >> 23) & 1; /* 0x0800000 */
+ util_cpu_caps.has_sse = (regs2[3] >> 25) & 1; /* 0x2000000 */
+ util_cpu_caps.has_sse2 = (regs2[3] >> 26) & 1; /* 0x4000000 */
+ util_cpu_caps.has_sse3 = (regs2[2] >> 0) & 1; /* 0x0000001 */
+ util_cpu_caps.has_ssse3 = (regs2[2] >> 9) & 1; /* 0x0000020 */
+ util_cpu_caps.has_sse4_1 = (regs2[2] >> 19) & 1;
util_cpu_caps.has_mmx2 = util_cpu_caps.has_sse; /* SSE cpus
supports mmxext too */
cacheline = ((regs2[1] >> 8) & 0xFF) * 8;
@@ -290,10 +290,10 @@ util_cpu_detect(void)
cpuid(0x80000001, regs2);
- util_cpu_caps.has_mmx |= (regs2[3] & (1 << 23 )) >> 23; /* 0x0800000
*/
- util_cpu_caps.has_mmx2 |= (regs2[3] & (1 << 22 )) >> 22; /* 0x400000
*/
- util_cpu_caps.has_3dnow = (regs2[3] & (1 << 31 )) >> 31; /*
0x80000000 */
- util_cpu_caps.has_3dnow_ext = (regs2[3] & (1 << 30 )) >> 30;
+ util_cpu_caps.has_mmx |= (regs2[3] >> 23) & 1;
+ util_cpu_caps.has_mmx2 |= (regs2[3] >> 22) & 1;
+ util_cpu_caps.has_3dnow = (regs2[3] >> 31) & 1;
+ util_cpu_caps.has_3dnow_ext = (regs2[3] >> 30) & 1;
}
if (regs[0] >= 0x80000006) {
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