/*****************************************************************************
* cpu.c: CPU detection code
*****************************************************************************
- * Copyright (C) 1998-2004 the VideoLAN team
+ * Copyright (C) 1998-2004 VLC authors and VideoLAN
* $Id$
*
* Authors: Samuel Hocevar <sam@zoy.org>
* Christophe Massiot <massiot@via.ecp.fr>
* Eugenio Jarosiewicz <ej0@cise.ufl.eduEujenio>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
*
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
#include <vlc_common.h>
#include <vlc_cpu.h>
+#include "libvlc.h"
+
+#include <assert.h>
+#ifndef __linux__
#include <sys/types.h>
#ifndef WIN32
#include <unistd.h>
#else
#include <errno.h>
#endif
-#include <assert.h>
#ifdef __APPLE__
#include <sys/sysctl.h>
#endif
-#include "libvlc.h"
+#if defined(__OpenBSD__) && defined(__powerpc__)
+#include <sys/param.h>
+#include <sys/sysctl.h>
+#include <machine/cpu.h>
+#endif
static uint32_t cpu_flags;
-#if defined( __i386__ ) || defined( __x86_64__ ) || defined( __powerpc__ ) \
- || defined( __ppc__ ) || defined( __ppc64__ ) || defined( __powerpc64__ )
-# if !defined( WIN32 ) && !defined( __OS2__ )
-static bool check_OS_capability( const char *psz_capability, pid_t pid )
+#if defined (__i386__) || defined (__x86_64__) || defined (__powerpc__) \
+ || defined (__ppc__) || defined (__ppc64__) || defined (__powerpc64__)
+# if !defined (WIN32) && !defined (__OS2__)
+static bool vlc_CPU_check (const char *name, void (*func) (void))
{
- int status;
+ pid_t pid = fork();
- if( pid == -1 )
- return false; /* fail safe :-/ */
+ switch (pid)
+ {
+ case 0:
+ signal (SIGILL, SIG_DFL);
+ func ();
+ //__asm__ __volatile__ ( code : : input );
+ _exit (0);
+ case -1:
+ return false;
+ }
+ //i_capabilities |= (flag);
+ int status;
while( waitpid( pid, &status, 0 ) == -1 );
if( WIFEXITED( status ) && WEXITSTATUS( status ) == 0 )
return true;
- fprintf( stderr, "warning: your CPU has %s instructions, but not your "
- "operating system.\n", psz_capability );
+ fprintf (stderr, "Warning: your CPU has %s instructions, but not your "
+ "operating system.\n", name);
fprintf( stderr, " some optimizations will be disabled unless "
"you upgrade your OS\n" );
return false;
}
-# define check_capability(name, flag, code, input) \
- do { \
- pid_t pid = fork(); \
- if( pid == 0 ) \
- { \
- signal(SIGILL, SIG_DFL); \
- __asm__ __volatile__ ( code : : input ); \
- _exit(0); \
- } \
- if( check_OS_capability((name), pid )) \
- i_capabilities |= (flag); \
- } while(0)
-
-# else /* WIN32 || __OS2__ */
-# define check_capability(name, flag, code, input) \
- i_capabilities |= (flag);
-# endif
+#if defined (CAN_COMPILE_SSE) && !defined (__SSE__)
+VLC_SSE static void SSE_test (void)
+{
+ asm volatile ("xorps %%xmm0,%%xmm0\n" : : : "xmm0", "xmm1");
+}
+#endif
+#if defined (CAN_COMPILE_SSE2) && !defined (__SSE2__)
+VLC_SSE static void SSE2_test (void)
+{
+ asm volatile ("movupd %%xmm0, %%xmm0\n" : : : "xmm0", "xmm1");
+}
+#endif
+#if defined (CAN_COMPILE_SSE3) && !defined (__SSE3__)
+VLC_SSE static void SSE3_test (void)
+{
+ asm volatile ("movsldup %%xmm1, %%xmm0\n" : : : "xmm0", "xmm1");
+}
+#endif
+#if defined (CAN_COMPILE_SSSE3) && !defined (__SSSE3__)
+VLC_SSE static void SSSE3_test (void)
+{
+ asm volatile ("pabsw %%xmm1, %%xmm0\n" : : : "xmm0", "xmm1");
+}
+#endif
+#if defined (CAN_COMPILE_SSE4_1) && !defined (__SSE4_1__)
+VLC_SSE static void SSE4_1_test (void)
+{
+ asm volatile ("pmaxsb %%xmm1, %%xmm0\n" : : : "xmm0", "xmm1");
+}
+#endif
+#if defined (CAN_COMPILE_SSE4_2) && !defined (__SSE4_2__)
+VLC_SSE static void SSE4_2_test (void)
+{
+ asm volatile ("pcmpgtq %%xmm1, %%xmm0\n" : : : "xmm0", "xmm1");
+}
+#endif
+#if defined (CAN_COMPILE_3DNOW) && !defined (__3dNOW__)
+VLC_MMX static void ThreeD_Now_test (void)
+{
+ asm volatile ("pfadd %%mm0,%%mm0\n" "femms\n" : : : "mm0");
+}
+#endif
+
+#if defined (CAN_COMPILE_ALTIVEC)
+static void Altivec_test (void)
+{
+ asm volatile ("mtspr 256, %0\n" "vand %%v0, %%v0, %%v0\n" : : "r" (-1));
+}
+#endif
+
+#else /* WIN32 || __OS2__ */
+# define vlc_CPU_check(name, func) (1)
+#endif
#endif
/**
i_capabilities |= CPU_CAPABILITY_MMXEXT;
# ifdef CAN_COMPILE_SSE
- check_capability( "SSE", CPU_CAPABILITY_SSE,
- "xorps %%xmm0,%%xmm0\n", );
+ if (vlc_CPU_check ("SSE", SSE_test))
+ i_capabilities |= CPU_CAPABILITY_SSE;
# endif
}
# endif
# if defined (__SSE2__)
i_capabilities |= CPU_CAPABILITY_SSE2;
# elif defined (CAN_COMPILE_SSE2)
- if( i_edx & 0x04000000 )
- check_capability( "SSE2", CPU_CAPABILITY_SSE2,
- "movupd %%xmm0, %%xmm0\n", );
+ if ((i_edx & 0x04000000) && vlc_CPU_check ("SSE2", SSE2_test))
+ i_capabilities |= CPU_CAPABILITY_SSE2;
# endif
# if defined (__SSE3__)
i_capabilities |= CPU_CAPABILITY_SSE3;
# elif defined (CAN_COMPILE_SSE3)
- if( i_ecx & 0x00000001 )
- check_capability( "SSE3", CPU_CAPABILITY_SSE3,
- "movsldup %%xmm1, %%xmm0\n", );
+ if ((i_ecx & 0x00000001) && vlc_CPU_check ("SSE3", SSE3_test))
+ i_capabilities |= CPU_CAPABILITY_SSE3;
# endif
# if defined (__SSSE3__)
i_capabilities |= CPU_CAPABILITY_SSSE3;
# elif defined (CAN_COMPILE_SSSE3)
- if( i_ecx & 0x00000200 )
- check_capability( "SSSE3", CPU_CAPABILITY_SSSE3,
- "pabsw %%xmm1, %%xmm0\n", );
+ if ((i_ecx & 0x00000200) && vlc_CPU_check ("SSSE3", SSSE3_test))
+ i_capabilities |= CPU_CAPABILITY_SSSE3;
# endif
# if defined (__SSE4_1__)
i_capabilities |= CPU_CAPABILITY_SSE4_1;
# elif defined (CAN_COMPILE_SSE4_1)
- if( i_ecx & 0x00080000 )
- check_capability( "SSE4.1", CPU_CAPABILITY_SSE4_1,
- "pmaxsb %%xmm1, %%xmm0\n", );
+ if ((i_ecx & 0x00080000) && vlc_CPU_check ("SSE4.1", SSE4_1_test))
+ i_capabilities |= CPU_CAPABILITY_SSE4_1;
# endif
# if defined (__SSE4_2__)
i_capabilities |= CPU_CAPABILITY_SSE4_2;
# elif defined (CAN_COMPILE_SSE4_2)
- if( i_ecx & 0x00100000 )
- check_capability( "SSE4.2", CPU_CAPABILITY_SSE4_2,
- "pcmpgtq %%xmm1, %%xmm0\n", );
+ if ((i_ecx & 0x00100000) && vlc_CPU_check ("SSE4.2", SSE4_2_test))
+ i_capabilities |= CPU_CAPABILITY_SSE4_2;
# endif
/* test for additional capabilities */
# if defined (__3dNOW__)
i_capabilities |= CPU_CAPABILITY_3DNOW;
# elif defined (CAN_COMPILE_3DNOW)
- if( i_edx & 0x80000000 )
- check_capability( "3D Now!", CPU_CAPABILITY_3DNOW,
- "pfadd %%mm0,%%mm0\n" "femms\n", );
+ if ((i_edx & 0x80000000) && vlc_CPU_check ("3D Now!", ThreeD_Now_test))
+ i_capabilities |= CPU_CAPABILITY_3DNOW;
# endif
if( b_amd && ( i_edx & 0x00400000 ) )
}
out:
-#elif defined (__arm__)
-
-# if defined (__ARM_NEON__)
- i_capabilities |= CPU_CAPABILITY_NEON;
-# elif defined (CAN_COMPILE_NEON)
-# define NEED_RUNTIME_CPU_CHECK 1
-# endif
-
-# ifdef NEED_RUNTIME_CPU_CHECK
-# if defined (__linux__)
- FILE *info = fopen ("/proc/cpuinfo", "rt");
- if (info != NULL)
- {
- char *line = NULL;
- size_t linelen = 0;
-
- while (getline (&line, &linelen, info) != -1)
- {
- const char *cap;
-
- if (strncmp (line, "Features\t:", 10))
- continue;
-
- /* TODO: detect other CPU features when we use them */
-# if defined (CAN_COMPILE_NEON) && !defined (__ARM_NEON__)
- cap = strstr (line + 10, " neon");
- if (cap != NULL && (cap[5] == '\0' || cap[5] == ' '))
- i_capabilities |= CPU_CAPABILITY_NEON;
-# endif
- break;
- }
- fclose (info);
- free (line);
- }
-# else
-# warning Run-time CPU detection missing: optimizations disabled!
-# endif
-# endif
-
#elif defined( __powerpc__ ) || defined( __ppc__ ) || defined( __powerpc64__ ) \
|| defined( __ppc64__ )
i_capabilities |= CPU_CAPABILITY_ALTIVEC;
# elif defined( CAN_COMPILE_ALTIVEC )
- check_capability( "Altivec", CPU_CAPABILITY_ALTIVEC,
- "mtspr 256, %0\n\t"
- "vand %%v0, %%v0, %%v0",
- "r" (-1));
+ if (vlc_CPU_check ("Altivec", Altivec_test))
+ i_capabilities |= CPU_CAPABILITY_ALTIVEC;
# endif
#endif
return cpu_flags;
}
+#endif
void vlc_CPU_dump (vlc_object_t *obj)
{
#elif defined (__arm__)
PRINT_CAPABILITY(CPU_CAPABILITY_NEON, "NEONv1");
+#else
+ (void) flags;
+
#endif
#if HAVE_FPU
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