1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/cairo/libpixman/src/pixman-ppc.c Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,155 @@
1.4 +/*
1.5 + * Copyright © 2000 SuSE, Inc.
1.6 + * Copyright © 2007 Red Hat, Inc.
1.7 + *
1.8 + * Permission to use, copy, modify, distribute, and sell this software and its
1.9 + * documentation for any purpose is hereby granted without fee, provided that
1.10 + * the above copyright notice appear in all copies and that both that
1.11 + * copyright notice and this permission notice appear in supporting
1.12 + * documentation, and that the name of SuSE not be used in advertising or
1.13 + * publicity pertaining to distribution of the software without specific,
1.14 + * written prior permission. SuSE makes no representations about the
1.15 + * suitability of this software for any purpose. It is provided "as is"
1.16 + * without express or implied warranty.
1.17 + *
1.18 + * SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
1.19 + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE
1.20 + * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
1.21 + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
1.22 + * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
1.23 + * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1.24 + */
1.25 +#ifdef HAVE_CONFIG_H
1.26 +#include <config.h>
1.27 +#endif
1.28 +
1.29 +#include "pixman-private.h"
1.30 +
1.31 +#ifdef USE_VMX
1.32 +
1.33 +/* The CPU detection code needs to be in a file not compiled with
1.34 + * "-maltivec -mabi=altivec", as gcc would try to save vector register
1.35 + * across function calls causing SIGILL on cpus without Altivec/vmx.
1.36 + */
1.37 +#ifdef __APPLE__
1.38 +#include <sys/sysctl.h>
1.39 +
1.40 +static pixman_bool_t
1.41 +pixman_have_vmx (void)
1.42 +{
1.43 + int error, have_vmx;
1.44 + size_t length = sizeof(have_vmx);
1.45 +
1.46 + error = sysctlbyname ("hw.optional.altivec", &have_vmx, &length, NULL, 0);
1.47 +
1.48 + if (error)
1.49 + return FALSE;
1.50 +
1.51 + return have_vmx;
1.52 +}
1.53 +
1.54 +#elif defined (__OpenBSD__)
1.55 +#include <sys/param.h>
1.56 +#include <sys/sysctl.h>
1.57 +#include <machine/cpu.h>
1.58 +
1.59 +static pixman_bool_t
1.60 +pixman_have_vmx (void)
1.61 +{
1.62 + int error, have_vmx;
1.63 + int mib[2] = { CTL_MACHDEP, CPU_ALTIVEC };
1.64 + size_t length = sizeof(have_vmx);
1.65 +
1.66 + error = sysctl (mib, 2, &have_vmx, &length, NULL, 0);
1.67 +
1.68 + if (error != 0)
1.69 + return FALSE;
1.70 +
1.71 + return have_vmx;
1.72 +}
1.73 +
1.74 +#elif defined (__linux__)
1.75 +
1.76 +#include <sys/types.h>
1.77 +#include <sys/stat.h>
1.78 +#include <fcntl.h>
1.79 +#include <unistd.h>
1.80 +#include <stdio.h>
1.81 +#include <linux/auxvec.h>
1.82 +#include <asm/cputable.h>
1.83 +
1.84 +static pixman_bool_t
1.85 +pixman_have_vmx (void)
1.86 +{
1.87 + int have_vmx = FALSE;
1.88 + int fd;
1.89 + struct
1.90 + {
1.91 + unsigned long type;
1.92 + unsigned long value;
1.93 + } aux;
1.94 +
1.95 + fd = open ("/proc/self/auxv", O_RDONLY);
1.96 + if (fd >= 0)
1.97 + {
1.98 + while (read (fd, &aux, sizeof (aux)) == sizeof (aux))
1.99 + {
1.100 + if (aux.type == AT_HWCAP && (aux.value & PPC_FEATURE_HAS_ALTIVEC))
1.101 + {
1.102 + have_vmx = TRUE;
1.103 + break;
1.104 + }
1.105 + }
1.106 +
1.107 + close (fd);
1.108 + }
1.109 +
1.110 + return have_vmx;
1.111 +}
1.112 +
1.113 +#else /* !__APPLE__ && !__OpenBSD__ && !__linux__ */
1.114 +#include <signal.h>
1.115 +#include <setjmp.h>
1.116 +
1.117 +static jmp_buf jump_env;
1.118 +
1.119 +static void
1.120 +vmx_test (int sig,
1.121 + siginfo_t *si,
1.122 + void * unused)
1.123 +{
1.124 + longjmp (jump_env, 1);
1.125 +}
1.126 +
1.127 +static pixman_bool_t
1.128 +pixman_have_vmx (void)
1.129 +{
1.130 + struct sigaction sa, osa;
1.131 + int jmp_result;
1.132 +
1.133 + sa.sa_flags = SA_SIGINFO;
1.134 + sigemptyset (&sa.sa_mask);
1.135 + sa.sa_sigaction = vmx_test;
1.136 + sigaction (SIGILL, &sa, &osa);
1.137 + jmp_result = setjmp (jump_env);
1.138 + if (jmp_result == 0)
1.139 + {
1.140 + asm volatile ( "vor 0, 0, 0" );
1.141 + }
1.142 + sigaction (SIGILL, &osa, NULL);
1.143 + return (jmp_result == 0);
1.144 +}
1.145 +
1.146 +#endif /* __APPLE__ */
1.147 +#endif /* USE_VMX */
1.148 +
1.149 +pixman_implementation_t *
1.150 +_pixman_ppc_get_implementations (pixman_implementation_t *imp)
1.151 +{
1.152 +#ifdef USE_VMX
1.153 + if (!_pixman_disabled ("vmx") && pixman_have_vmx ())
1.154 + imp = _pixman_implementation_create_vmx (imp);
1.155 +#endif
1.156 +
1.157 + return imp;
1.158 +}
