third_party/zlib/x86.c - Issue 705053002: Enable zlib SIMD optimisations on Mac OS X builds

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Side by Side Diff: third_party/zlib/x86.c

Issue 705053002: Enable zlib SIMD optimisations on Mac OS X builds (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: Keep disabled on ios; initialise symbols so we're in the BSS Created 6 years, 1 month ago

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1 /*	1 /*

2 * x86 feature check	2 * x86 feature check

3 *	3 *

4 * Copyright (C) 2013 Intel Corporation. All rights reserved.	4 * Copyright (C) 2013 Intel Corporation. All rights reserved.

5 * Author:	5 * Author:

6 * Jim Kukunas	6 * Jim Kukunas

7 *	7 *

8 * For conditions of distribution and use, see copyright notice in zlib.h	8 * For conditions of distribution and use, see copyright notice in zlib.h

9 */	9 */

10	10

11 #include "x86.h"	11 #include "x86.h"

12	12

13 int x86_cpu_enable_simd;	13 int x86_cpu_enable_simd = 0;

14	14

15 #ifndef _MSC_VER	15 #ifndef _MSC_VER

16 #include <pthread.h>	16 #include <pthread.h>

17	17

18 pthread_once_t cpu_check_inited_once = PTHREAD_ONCE_INIT;	18 pthread_once_t cpu_check_inited_once = PTHREAD_ONCE_INIT;

19 static void _x86_check_features(void);	19 static void _x86_check_features(void);

20	20

21 void x86_check_features(void)	21 void x86_check_features(void)

22 {	22 {

23 pthread_once(&cpu_check_inited_once, _x86_check_features);	23 pthread_once(&cpu_check_inited_once, _x86_check_features);

(...skipping 79 matching lines...) Expand 10 before \| Expand all \| Expand 10 after Loading...
103	103

104 x86_cpu_has_sse2 = regs[3] & 0x4000000;	104 x86_cpu_has_sse2 = regs[3] & 0x4000000;

105 x86_cpu_has_sse42= regs[2] & 0x100000;	105 x86_cpu_has_sse42= regs[2] & 0x100000;

106 x86_cpu_has_pclmulqdq = regs[2] & 0x2;	106 x86_cpu_has_pclmulqdq = regs[2] & 0x2;

107	107

108 x86_cpu_enable_simd = x86_cpu_has_sse2 &&	108 x86_cpu_enable_simd = x86_cpu_has_sse2 &&

109 x86_cpu_has_sse42 &&	109 x86_cpu_has_sse42 &&

110 x86_cpu_has_pclmulqdq;	110 x86_cpu_has_pclmulqdq;

111 }	111 }

112 #endif /* _MSC_VER */	112 #endif /* _MSC_VER */

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