X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fmisc%2Fcpu.c;h=eca79b5911178ec05fd82c46f7c368b4c7d83ff7;hb=31268f2df54a433f2b50440bb504546bd19ed16a;hp=fb705a249f4f3a677f9dfca9cf7c1225baa0df7c;hpb=933d6755d4cd316745feb90601451e4f07ee2340;p=vlc diff --git a/src/misc/cpu.c b/src/misc/cpu.c index fb705a249f..eca79b5911 100644 --- a/src/misc/cpu.c +++ b/src/misc/cpu.c @@ -1,26 +1,26 @@ /***************************************************************************** * cpu.c: CPU detection code ***************************************************************************** - * Copyright (C) 1998-2004 the VideoLAN team + * Copyright (C) 1998-2004 VLC authors and VideoLAN * $Id$ * * Authors: Samuel Hocevar * Christophe Massiot * Eugenio Jarosiewicz * - * 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. *****************************************************************************/ /***************************************************************************** @@ -32,9 +32,13 @@ #include #include +#include "libvlc.h" + +#include +#ifndef __linux__ #include -#ifndef WIN32 +#ifndef _WIN32 #include #include #include @@ -42,59 +46,83 @@ #include #endif -#include "libvlc.h" +#ifdef __APPLE__ +#include +#endif +#ifdef __ANDROID__ +#include +#endif -#if defined(__APPLE__) && (defined(__ppc__) || defined(__ppc64__)) +#if defined(__OpenBSD__) && defined(__powerpc__) +#include #include +#include #endif -#if defined( __i386__ ) || defined( __x86_64__ ) || defined( __powerpc__ ) \ - || defined( __ppc__ ) || defined( __ppc64__ ) || defined( __powerpc64__ ) -# ifndef WIN32 -static bool check_OS_capability( const char *psz_capability, pid_t pid ) +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 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) \ - do { \ - pid_t pid = fork(); \ - if( pid == 0 ) \ - { \ - signal(SIGILL, SIG_DFL); \ - __asm__ __volatile__ ( code : : ); \ - _exit(0); \ - } \ - if( check_OS_capability((name), pid )) \ - i_capabilities |= (flag); \ - } while(0) - -# else /* WIN32 */ -# define check_capability(name, flag, code) \ - 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_3DNOW) +VLC_MMX static void ThreeD_Now_test (void) +{ + asm volatile ("pfadd %%mm0,%%mm0\n" "femms\n" : : : "mm0"); +} #endif -/***************************************************************************** - * CPUCapabilities: get the CPU capabilities - ***************************************************************************** - * This function is called to list extensions the CPU may have. - *****************************************************************************/ -uint32_t CPUCapabilities( void ) +#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 + +/** + * Determines the CPU capabilities and stores them in cpu_flags. + * The result can be retrieved with vlc_CPU(). + */ +void vlc_CPU_init (void) { uint32_t i_capabilities = 0; @@ -103,29 +131,21 @@ uint32_t CPUCapabilities( void ) bool b_amd; /* Needed for x86 CPU capabilities detection */ -# if defined( __x86_64__ ) -# define cpuid( reg ) \ - asm volatile ( "cpuid\n\t" \ - "movl %%ebx,%1\n\t" \ - : "=a" ( i_eax ), \ - "=b" ( i_ebx ), \ - "=c" ( i_ecx ), \ - "=d" ( i_edx ) \ - : "a" ( reg ) \ - : "cc" ); -# else -# define cpuid( reg ) \ - asm volatile ( "push %%ebx\n\t" \ - "cpuid\n\t" \ - "movl %%ebx,%1\n\t" \ - "pop %%ebx\n\t" \ - : "=a" ( i_eax ), \ - "=r" ( i_ebx ), \ - "=c" ( i_ecx ), \ - "=d" ( i_edx ) \ - : "a" ( reg ) \ - : "cc" ); -# endif +# if defined (__i386__) && defined (__PIC__) +# define cpuid(reg) \ + asm volatile ("xchgl %%ebx,%1\n\t" \ + "cpuid\n\t" \ + "xchgl %%ebx,%1\n\t" \ + : "=a" (i_eax), "=r" (i_ebx), "=c" (i_ecx), "=d" (i_edx) \ + : "a" (reg) \ + : "cc"); +# else +# define cpuid(reg) \ + asm volatile ("cpuid\n\t" \ + : "=a" (i_eax), "=b" (i_ebx), "=c" (i_ecx), "=d" (i_edx) \ + : "a" (reg) \ + : "cc"); +# endif /* Check if the OS really supports the requested instructions */ # if defined (__i386__) && !defined (__i486__) && !defined (__i586__) \ && !defined (__i686__) && !defined (__pentium4__) \ @@ -171,61 +191,27 @@ uint32_t CPUCapabilities( void ) if( ! (i_edx & 0x00800000) ) goto out; # endif - i_capabilities |= CPU_CAPABILITY_MMX; + i_capabilities |= VLC_CPU_MMX; -# if defined (__SSE__) - i_capabilities |= CPU_CAPABILITY_MMXEXT | CPU_CAPABILITY_SSE; -# else if( i_edx & 0x02000000 ) + i_capabilities |= VLC_CPU_MMXEXT; +# if defined (CAN_COMPILE_SSE) && !defined (__SSE__) + if (( i_edx & 0x02000000 ) && vlc_CPU_check ("SSE", SSE_test)) +# endif { - i_capabilities |= CPU_CAPABILITY_MMXEXT; - -# ifdef CAN_COMPILE_SSE - check_capability( "SSE", CPU_CAPABILITY_SSE, - "xorps %%xmm0,%%xmm0\n" ); -# endif + /*if( i_edx & 0x02000000 )*/ + i_capabilities |= VLC_CPU_SSE; + if (i_edx & 0x04000000) + i_capabilities |= VLC_CPU_SSE2; + if (i_ecx & 0x00000001) + i_capabilities |= VLC_CPU_SSE3; + if (i_ecx & 0x00000200) + i_capabilities |= VLC_CPU_SSSE3; + if (i_ecx & 0x00080000) + i_capabilities |= VLC_CPU_SSE4_1; + if (i_ecx & 0x00100000) + i_capabilities |= VLC_CPU_SSE4_2; } -# 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" ); -# 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" ); -# 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" ); -# 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" ); -# 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" ); -# endif /* test for additional capabilities */ cpuid( 0x80000000 ); @@ -236,166 +222,95 @@ uint32_t CPUCapabilities( void ) /* list these additional capabilities */ cpuid( 0x80000001 ); -# 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 defined (CAN_COMPILE_3DNOW) && !defined (__3dNOW__) + if ((i_edx & 0x80000000) && vlc_CPU_check ("3D Now!", ThreeD_Now_test)) # endif + i_capabilities |= VLC_CPU_3dNOW; if( b_amd && ( i_edx & 0x00400000 ) ) - { - i_capabilities |= CPU_CAPABILITY_MMXEXT; - } + i_capabilities |= VLC_CPU_MMXEXT; out: -#elif defined( __arm__ ) -# if defined( __ARM_NEON__ ) - i_capabilities |= CPU_CAPABILITY_NEON; -# endif - #elif defined( __powerpc__ ) || defined( __ppc__ ) || defined( __powerpc64__ ) \ || defined( __ppc64__ ) -# if defined(__APPLE__) +# if defined(__APPLE__) || defined(__OpenBSD__) +# if defined(__OpenBSD__) + int selectors[2] = { CTL_MACHDEP, CPU_ALTIVEC }; +# else int selectors[2] = { CTL_HW, HW_VECTORUNIT }; +# endif int i_has_altivec = 0; size_t i_length = sizeof( i_has_altivec ); int i_error = sysctl( selectors, 2, &i_has_altivec, &i_length, NULL, 0); if( i_error == 0 && i_has_altivec != 0 ) - i_capabilities |= CPU_CAPABILITY_ALTIVEC; + i_capabilities |= VLC_CPU_ALTIVEC; # elif defined( CAN_COMPILE_ALTIVEC ) - pid_t pid = fork(); - if( pid == 0 ) - { - signal(SIGILL, SIG_DFL); - asm volatile ("mtspr 256, %0\n\t" - "vand %%v0, %%v0, %%v0" - : - : "r" (-1)); - _exit(0); - } - - if( check_OS_capability( "Altivec", pid ) ) - i_capabilities |= CPU_CAPABILITY_ALTIVEC; + if (vlc_CPU_check ("Altivec", Altivec_test)) + i_capabilities |= VLC_CPU_ALTIVEC; # endif -#endif - return i_capabilities; -} - -uint32_t cpu_flags = 0; +#elif defined ( __arm__) +# ifdef __ANDROID__ + if (android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_NEON) + i_capabilities |= VLC_CPU_ARM_NEON; +# endif +#endif -/***************************************************************************** - * vlc_CPU: get pre-computed CPU capability flags - ****************************************************************************/ -unsigned vlc_CPU (void) -{ - return cpu_flags; + cpu_flags = i_capabilities; } -const struct -{ - uint32_t value; - char name[12]; -} cap_dirs[] = { -#if defined ( __i386__ ) || defined ( __x86_64__ ) - { CPU_CAPABILITY_MMX, "mmx" }, - { CPU_CAPABILITY_MMXEXT, "mmxext" }, - { CPU_CAPABILITY_3DNOW, "3dnow" }, - { CPU_CAPABILITY_SSE, "sse" }, -#endif -#if defined (__ppc__) || defined (__ppc64__) || defined (__powerpc__) - { CPU_CAPABILITY_ALTIVEC, "altivec" }, -#endif -#if defined (__arm__) - { CPU_CAPABILITY_NEON, "arm_neon" }, -#endif -}; - /** - * Return the number of available logical CPU. + * Retrieves pre-computed CPU capability flags */ -unsigned vlc_GetCPUCount(void) +unsigned vlc_CPU (void) { -#ifdef WIN32 - DWORD process_mask; - DWORD system_mask; - if (!GetProcessAffinityMask(GetCurrentProcess(), &process_mask, &system_mask)) - return 1; - - unsigned count = 0; - while (system_mask) { - count++; - system_mask >>= 1; - } - return count; -#elif HAVE_SCHED_GETAFFINITY - cpu_set_t cpu; - CPU_ZERO(&cpu); - if (sched_getaffinity(0, sizeof(cpu), &cpu) < 0) - return 1; - unsigned count = 0; - for (unsigned i = 0; i < CPU_SETSIZE; i++) - count += CPU_ISSET(i, &cpu) != 0; - return count; -#else -# warning "vlc_GetCPUCount is not implemented for your platform" - return 1; +/* On Windows and OS/2, + * initialized from DllMain() and _DLL_InitTerm() respectively, instead */ +#if !defined(_WIN32) && !defined(__OS2__) + static pthread_once_t once = PTHREAD_ONCE_INIT; + pthread_once (&once, vlc_CPU_init); #endif + return cpu_flags; } +#endif -/** - * Check if a directory name contains usable plugins w.r.t. the hardware - * capabilities. Loading a plugin when the hardware has insufficient - * capabilities may lead to illegal instructions (SIGILL) and must be avoided. - * - * @param name the name of the directory (not the path) - * - * @return true if the hardware has sufficient capabilities or the directory - * does not require any special capability; false if the running hardware has - * insufficient capabilities. - */ -bool vlc_CPU_CheckPluginDir (const char *name) +void vlc_CPU_dump (vlc_object_t *obj) { - const unsigned flags = vlc_CPU (); - for (size_t i = 0; i < sizeof (cap_dirs) / sizeof (cap_dirs[0]); i++) - { - if (strcmp (name, cap_dirs[i].name)) - continue; - return (flags & cap_dirs[i].value) != 0; - } - return true; -} + char buf[200], *p = buf; + +#if defined (__i386__) || defined (__x86_64__) + if (vlc_CPU_MMX()) p += sprintf (p, "MMX "); + if (vlc_CPU_MMXEXT()) p += sprintf (p, "MMXEXT "); + if (vlc_CPU_SSE()) p += sprintf (p, "SSE "); + if (vlc_CPU_SSE2()) p += sprintf (p, "SSE2 "); + if (vlc_CPU_SSE3()) p += sprintf (p, "SSE3 "); + if (vlc_CPU_SSSE3()) p += sprintf (p, "SSSE3 "); + if (vlc_CPU_SSE4_1()) p += sprintf (p, "SSE4.1 "); + if (vlc_CPU_SSE4_2()) p += sprintf (p, "SSE4.2 "); + if (vlc_CPU_SSE4A()) p += sprintf (p, "SSE4A "); + if (vlc_CPU_AVX()) p += sprintf (p, "AVX "); + if (vlc_CPU_AVX2()) p += sprintf (p, "AVX "); + if (vlc_CPU_3dNOW()) p += sprintf (p, "3DNow! "); + if (vlc_CPU_XOP()) p += sprintf (p, "XOP "); + if (vlc_CPU_FMA4()) p += sprintf (p, "FMA4 "); + +#elif defined (__powerpc__) || defined (__ppc__) || defined (__ppc64__) + if (vlc_CPU_ALTIVEC()) p += sprintf (p, "AltiVec"); + +#elif defined (__arm__) + if (vlc_CPU_ARM_NEON()) p += sprintf (p, "ARM_NEON "); -static vlc_memcpy_t pf_vlc_memcpy = memcpy; -static vlc_memset_t pf_vlc_memset = memset; - -void vlc_fastmem_register (vlc_memcpy_t cpy, vlc_memset_t set) -{ - if (cpy) - pf_vlc_memcpy = cpy; - if (set) - pf_vlc_memset = set; -} +#endif -/** - * vlc_memcpy: fast CPU-dependent memcpy - */ -void *vlc_memcpy (void *tgt, const void *src, size_t n) -{ - return pf_vlc_memcpy (tgt, src, n); -} +#if HAVE_FPU + p += sprintf (p, "FPU "); +#endif -/** - * vlc_memset: fast CPU-dependent memset - */ -void *vlc_memset (void *tgt, int c, size_t n) -{ - return pf_vlc_memset (tgt, c, n); + if (p > buf) + msg_Dbg (obj, "CPU has capabilities %s", buf); }