author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 16 Apr 2010 16:46:38 +0300 | |
changeset 18 | 47c74d1534e1 |
permissions | -rw-r--r-- |
18
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/* |
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* LIBOIL - Library of Optimized Inner Loops |
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* Copyright (c) 2003,2004 David A. Schleef <ds@schleef.org> |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, |
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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|
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#ifdef HAVE_CONFIG_H |
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#include "config.h" |
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#endif |
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#include <liboil/liboilfunction.h> |
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#include <liboil/liboildebug.h> |
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#include <liboil/liboilcpu.h> |
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#include <liboil/liboilfault.h> |
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#include <liboil/liboilutils.h> |
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|
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#if defined(__linux__) |
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#include <linux/auxvec.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <fcntl.h> |
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#include <unistd.h> |
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#include <stdio.h> |
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#ifndef PPC_FEATURE_HAS_ALTIVEC |
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/* From linux-2.6/include/asm-powerpc/cputable.h */ |
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#define PPC_FEATURE_HAS_ALTIVEC 0x10000000 |
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#endif |
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#endif |
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#if defined(__APPLE__) |
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#include <sys/types.h> |
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#include <sys/sysctl.h> |
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#endif |
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#if defined(__FreeBSD__) |
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#include <sys/types.h> |
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#include <sys/sysctl.h> |
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#endif |
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/***** powerpc *****/ |
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static unsigned long |
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oil_profile_stamp_tb(void) |
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{ |
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unsigned long ts; |
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__asm__ __volatile__("mftb %0\n" : "=r" (ts)); |
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return ts; |
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} |
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#if !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__) && !defined(__APPLE__) && !defined(__linux__) |
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static void |
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test_altivec (void * ignored) |
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{ |
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asm volatile ("vor v0, v0, v0\n"); |
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} |
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#endif |
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#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
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static void |
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oil_check_altivec_sysctl_freebsd (void) |
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{ |
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int ret, av; |
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size_t len; |
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len = sizeof(av); |
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ret = sysctlbyname("hw.altivec", &av, &len, NULL, 0); |
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if (!ret && av) { |
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oil_cpu_flags |= OIL_IMPL_FLAG_ALTIVEC; |
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} |
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} |
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#endif |
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#if defined(__APPLE__) |
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static void |
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oil_check_altivec_sysctl_darwin (void) |
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{ |
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int ret, vu; |
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size_t len; |
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103 |
len = sizeof(vu); |
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|
104 |
ret = sysctlbyname("hw.vectorunit", &vu, &len, NULL, 0); |
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|
105 |
if (!ret && vu) { |
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|
106 |
oil_cpu_flags |= OIL_IMPL_FLAG_ALTIVEC; |
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107 |
} |
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108 |
} |
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109 |
#endif |
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|
110 |
|
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111 |
#if defined(__linux__) |
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112 |
static void |
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113 |
oil_check_altivec_proc_auxv (void) |
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114 |
{ |
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115 |
static int available = -1; |
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116 |
int new_avail = 0; |
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117 |
unsigned long buf[64]; |
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118 |
ssize_t count; |
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119 |
int fd, i; |
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120 |
|
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121 |
/* Flags already set */ |
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122 |
if (available != -1) { |
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123 |
return; |
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124 |
} |
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125 |
|
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126 |
fd = open("/proc/self/auxv", O_RDONLY); |
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127 |
if (fd < 0) { |
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128 |
goto out; |
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129 |
} |
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130 |
|
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131 |
more: |
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132 |
count = read(fd, buf, sizeof(buf)); |
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133 |
if (count < 0) { |
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134 |
goto out_close; |
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135 |
} |
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|
136 |
|
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137 |
for (i=0; i < (count / sizeof(unsigned long)); i += 2) { |
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Revision: 201011
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|
138 |
if (buf[i] == AT_HWCAP) { |
47c74d1534e1
Revision: 201011
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|
139 |
new_avail = !!(buf[i+1] & PPC_FEATURE_HAS_ALTIVEC); |
47c74d1534e1
Revision: 201011
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|
140 |
goto out_close; |
47c74d1534e1
Revision: 201011
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parents:
diff
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|
141 |
} else if (buf[i] == AT_NULL) { |
47c74d1534e1
Revision: 201011
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parents:
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|
142 |
goto out_close; |
47c74d1534e1
Revision: 201011
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diff
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|
143 |
} |
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Revision: 201011
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|
144 |
} |
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|
145 |
|
47c74d1534e1
Revision: 201011
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parents:
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|
146 |
if (count == sizeof(buf)) { |
47c74d1534e1
Revision: 201011
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|
147 |
goto more; |
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|
148 |
} |
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|
149 |
|
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Revision: 201011
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|
150 |
out_close: |
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Revision: 201011
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|
151 |
close(fd); |
47c74d1534e1
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|
152 |
|
47c74d1534e1
Revision: 201011
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|
153 |
out: |
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|
154 |
available = new_avail; |
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Revision: 201011
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|
155 |
if (available) { |
47c74d1534e1
Revision: 201011
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|
156 |
oil_cpu_flags |= OIL_IMPL_FLAG_ALTIVEC; |
47c74d1534e1
Revision: 201011
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|
157 |
} |
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|
158 |
} |
47c74d1534e1
Revision: 201011
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|
159 |
#endif |
47c74d1534e1
Revision: 201011
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parents:
diff
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|
160 |
|
47c74d1534e1
Revision: 201011
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|
161 |
#if !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__) && !defined(__APPLE__) && !defined(__linux__) |
47c74d1534e1
Revision: 201011
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|
162 |
static void |
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Revision: 201011
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|
163 |
oil_check_altivec_fault (void) |
47c74d1534e1
Revision: 201011
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|
164 |
{ |
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|
165 |
oil_fault_check_enable (); |
47c74d1534e1
Revision: 201011
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|
166 |
if (oil_fault_check_try(test_altivec, NULL)) { |
47c74d1534e1
Revision: 201011
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|
167 |
OIL_DEBUG ("cpu flag altivec"); |
47c74d1534e1
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|
168 |
oil_cpu_flags |= OIL_IMPL_FLAG_ALTIVEC; |
47c74d1534e1
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|
169 |
} |
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|
170 |
oil_fault_check_disable (); |
47c74d1534e1
Revision: 201011
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|
171 |
} |
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|
172 |
#endif |
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|
173 |
|
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|
174 |
void |
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Revision: 201011
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|
175 |
oil_cpu_detect_arch(void) |
47c74d1534e1
Revision: 201011
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|
176 |
{ |
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|
177 |
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
47c74d1534e1
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|
178 |
oil_check_altivec_sysctl_freebsd(); |
47c74d1534e1
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|
179 |
#elif defined(__APPLE__) |
47c74d1534e1
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|
180 |
oil_check_altivec_sysctl_darwin(); |
47c74d1534e1
Revision: 201011
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|
181 |
#elif defined(__linux__) |
47c74d1534e1
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|
182 |
oil_check_altivec_proc_auxv(); |
47c74d1534e1
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|
183 |
#else |
47c74d1534e1
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|
184 |
oil_check_altivec_fault(); |
47c74d1534e1
Revision: 201011
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|
185 |
#endif |
47c74d1534e1
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|
186 |
|
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Revision: 201011
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|
187 |
_oil_profile_stamp = oil_profile_stamp_tb; |
47c74d1534e1
Revision: 201011
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|
188 |
} |
47c74d1534e1
Revision: 201011
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diff
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|
189 |
|
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Revision: 201011
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diff
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|
190 |
|
47c74d1534e1
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parents:
diff
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|
191 |