1 /************************************************************************** 2 * 3 * Copyright 2008 Dennis Smit 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * on the rights to use, copy, modify, merge, publish, distribute, sub 10 * license, and/or sell copies of the Software, and to permit persons to whom 11 * the Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice (including the next 14 * paragraph) shall be included in all copies or substantial portions of the 15 * Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 20 * AUTHORS, COPYRIGHT HOLDERS, AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, 21 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 22 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 23 * USE OR OTHER DEALINGS IN THE SOFTWARE. 24 * 25 **************************************************************************/ 26 27 /** 28 * @file 29 * CPU feature detection. 30 * 31 * @author Dennis Smit 32 * @author Based on the work of Eric Anholt <anholt (at) FreeBSD.org> 33 */ 34 35 #include "pipe/p_config.h" 36 37 #include "u_debug.h" 38 #include "u_cpu_detect.h" 39 40 #if defined(PIPE_ARCH_PPC) 41 #if defined(PIPE_OS_APPLE) 42 #include <sys/sysctl.h> 43 #else 44 #include <signal.h> 45 #include <setjmp.h> 46 #endif 47 #endif 48 49 #if defined(PIPE_OS_NETBSD) || defined(PIPE_OS_OPENBSD) 50 #include <sys/param.h> 51 #include <sys/sysctl.h> 52 #include <machine/cpu.h> 53 #endif 54 55 #if defined(PIPE_OS_FREEBSD) 56 #include <sys/types.h> 57 #include <sys/sysctl.h> 58 #endif 59 60 #if defined(PIPE_OS_LINUX) 61 #include <signal.h> 62 #endif 63 64 #ifdef PIPE_OS_UNIX 65 #include <unistd.h> 66 #endif 67 68 #if defined(PIPE_OS_WINDOWS) 69 #include <windows.h> 70 #if defined(MSVC) 71 #include <intrin.h> 72 #endif 73 #endif 74 75 76 #ifdef DEBUG 77 DEBUG_GET_ONCE_BOOL_OPTION(dump_cpu, "GALLIUM_DUMP_CPU", FALSE) 78 #endif 79 80 81 struct util_cpu_caps util_cpu_caps; 82 83 #if defined(PIPE_ARCH_X86) || defined(PIPE_ARCH_X86_64) 84 static int has_cpuid(void); 85 #endif 86 87 88 #if defined(PIPE_ARCH_PPC) && !defined(PIPE_OS_APPLE) 89 static jmp_buf __lv_powerpc_jmpbuf; 90 static volatile sig_atomic_t __lv_powerpc_canjump = 0; 91 92 static void 93 sigill_handler(int sig) 94 { 95 if (!__lv_powerpc_canjump) { 96 signal (sig, SIG_DFL); 97 raise (sig); 98 } 99 100 __lv_powerpc_canjump = 0; 101 longjmp(__lv_powerpc_jmpbuf, 1); 102 } 103 #endif 104 105 #if defined(PIPE_ARCH_PPC) 106 static void 107 check_os_altivec_support(void) 108 { 109 #if defined(PIPE_OS_APPLE) 110 int sels[2] = {CTL_HW, HW_VECTORUNIT}; 111 int has_vu = 0; 112 int len = sizeof (has_vu); 113 int err; 114 115 err = sysctl(sels, 2, &has_vu, &len, NULL, 0); 116 117 if (err == 0) { 118 if (has_vu != 0) { 119 util_cpu_caps.has_altivec = 1; 120 } 121 } 122 #else /* !PIPE_OS_APPLE */ 123 /* not on Apple/Darwin, do it the brute-force way */ 124 /* this is borrowed from the libmpeg2 library */ 125 signal(SIGILL, sigill_handler); 126 if (setjmp(__lv_powerpc_jmpbuf)) { 127 signal(SIGILL, SIG_DFL); 128 } else { 129 __lv_powerpc_canjump = 1; 130 131 __asm __volatile 132 ("mtspr 256, %0\n\t" 133 "vand %%v0, %%v0, %%v0" 134 : 135 : "r" (-1)); 136 137 signal(SIGILL, SIG_DFL); 138 util_cpu_caps.has_altivec = 1; 139 } 140 #endif /* !PIPE_OS_APPLE */ 141 } 142 #endif /* PIPE_ARCH_PPC */ 143 144 145 #if defined(PIPE_ARCH_X86) || defined (PIPE_ARCH_X86_64) 146 static int has_cpuid(void) 147 { 148 #if defined(PIPE_ARCH_X86) 149 #if defined(PIPE_OS_GCC) 150 int a, c; 151 152 __asm __volatile 153 ("pushf\n" 154 "popl %0\n" 155 "movl %0, %1\n" 156 "xorl $0x200000, %0\n" 157 "push %0\n" 158 "popf\n" 159 "pushf\n" 160 "popl %0\n" 161 : "=a" (a), "=c" (c) 162 : 163 : "cc"); 164 165 return a != c; 166 #else 167 /* FIXME */ 168 return 1; 169 #endif 170 #elif defined(PIPE_ARCH_X86_64) 171 return 1; 172 #else 173 return 0; 174 #endif 175 } 176 177 178 /** 179 * @sa cpuid.h included in gcc-4.3 onwards. 180 * @sa http://msdn.microsoft.com/en-us/library/hskdteyh.aspx 181 */ 182 static INLINE void 183 cpuid(uint32_t ax, uint32_t *p) 184 { 185 #if defined(PIPE_CC_GCC) && defined(PIPE_ARCH_X86) 186 __asm __volatile ( 187 "xchgl %%ebx, %1\n\t" 188 "cpuid\n\t" 189 "xchgl %%ebx, %1" 190 : "=a" (p[0]), 191 "=S" (p[1]), 192 "=c" (p[2]), 193 "=d" (p[3]) 194 : "0" (ax) 195 ); 196 #elif defined(PIPE_CC_GCC) && defined(PIPE_ARCH_X86_64) 197 __asm __volatile ( 198 "cpuid\n\t" 199 : "=a" (p[0]), 200 "=b" (p[1]), 201 "=c" (p[2]), 202 "=d" (p[3]) 203 : "0" (ax) 204 ); 205 #elif defined(PIPE_CC_MSVC) 206 __cpuid(p, ax); 207 #else 208 p[0] = 0; 209 p[1] = 0; 210 p[2] = 0; 211 p[3] = 0; 212 #endif 213 } 214 #endif /* X86 or X86_64 */ 215 216 void 217 util_cpu_detect(void) 218 { 219 static boolean util_cpu_detect_initialized = FALSE; 220 221 if(util_cpu_detect_initialized) 222 return; 223 224 memset(&util_cpu_caps, 0, sizeof util_cpu_caps); 225 226 /* Count the number of CPUs in system */ 227 #if defined(PIPE_OS_WINDOWS) 228 { 229 SYSTEM_INFO system_info; 230 GetSystemInfo(&system_info); 231 util_cpu_caps.nr_cpus = system_info.dwNumberOfProcessors; 232 } 233 #elif defined(PIPE_OS_UNIX) && defined(_SC_NPROCESSORS_ONLN) 234 util_cpu_caps.nr_cpus = sysconf(_SC_NPROCESSORS_ONLN); 235 if (util_cpu_caps.nr_cpus == -1) 236 util_cpu_caps.nr_cpus = 1; 237 #elif defined(PIPE_OS_BSD) 238 { 239 int mib[2], ncpu; 240 int len; 241 242 mib[0] = CTL_HW; 243 mib[1] = HW_NCPU; 244 245 len = sizeof (ncpu); 246 sysctl(mib, 2, &ncpu, &len, NULL, 0); 247 util_cpu_caps.nr_cpus = ncpu; 248 } 249 #else 250 util_cpu_caps.nr_cpus = 1; 251 #endif 252 253 #if defined(PIPE_ARCH_X86) || defined(PIPE_ARCH_X86_64) 254 if (has_cpuid()) { 255 uint32_t regs[4]; 256 uint32_t regs2[4]; 257 258 util_cpu_caps.cacheline = 32; 259 260 /* Get max cpuid level */ 261 cpuid(0x00000000, regs); 262 263 if (regs[0] >= 0x00000001) { 264 unsigned int cacheline; 265 266 cpuid (0x00000001, regs2); 267 268 util_cpu_caps.x86_cpu_type = (regs2[0] >> 8) & 0xf; 269 if (util_cpu_caps.x86_cpu_type == 0xf) 270 util_cpu_caps.x86_cpu_type = 8 + ((regs2[0] >> 20) & 255); /* use extended family (P4, IA64) */ 271 272 /* general feature flags */ 273 util_cpu_caps.has_tsc = (regs2[3] >> 8) & 1; /* 0x0000010 */ 274 util_cpu_caps.has_mmx = (regs2[3] >> 23) & 1; /* 0x0800000 */ 275 util_cpu_caps.has_sse = (regs2[3] >> 25) & 1; /* 0x2000000 */ 276 util_cpu_caps.has_sse2 = (regs2[3] >> 26) & 1; /* 0x4000000 */ 277 util_cpu_caps.has_sse3 = (regs2[2] >> 0) & 1; /* 0x0000001 */ 278 util_cpu_caps.has_ssse3 = (regs2[2] >> 9) & 1; /* 0x0000020 */ 279 util_cpu_caps.has_sse4_1 = (regs2[2] >> 19) & 1; 280 util_cpu_caps.has_sse4_2 = (regs2[2] >> 20) & 1; 281 util_cpu_caps.has_avx = (regs2[2] >> 28) & 1; 282 util_cpu_caps.has_mmx2 = util_cpu_caps.has_sse; /* SSE cpus supports mmxext too */ 283 284 cacheline = ((regs2[1] >> 8) & 0xFF) * 8; 285 if (cacheline > 0) 286 util_cpu_caps.cacheline = cacheline; 287 } 288 289 cpuid(0x80000000, regs); 290 291 if (regs[0] >= 0x80000001) { 292 293 cpuid(0x80000001, regs2); 294 295 util_cpu_caps.has_mmx |= (regs2[3] >> 23) & 1; 296 util_cpu_caps.has_mmx2 |= (regs2[3] >> 22) & 1; 297 util_cpu_caps.has_3dnow = (regs2[3] >> 31) & 1; 298 util_cpu_caps.has_3dnow_ext = (regs2[3] >> 30) & 1; 299 } 300 301 if (regs[0] >= 0x80000006) { 302 cpuid(0x80000006, regs2); 303 util_cpu_caps.cacheline = regs2[2] & 0xFF; 304 } 305 306 if (!util_cpu_caps.has_sse) { 307 util_cpu_caps.has_sse2 = 0; 308 util_cpu_caps.has_sse3 = 0; 309 util_cpu_caps.has_ssse3 = 0; 310 util_cpu_caps.has_sse4_1 = 0; 311 } 312 } 313 #endif /* PIPE_ARCH_X86 || PIPE_ARCH_X86_64 */ 314 315 #if defined(PIPE_ARCH_PPC) 316 check_os_altivec_support(); 317 #endif /* PIPE_ARCH_PPC */ 318 319 #ifdef DEBUG 320 if (debug_get_option_dump_cpu()) { 321 debug_printf("util_cpu_caps.nr_cpus = %u\n", util_cpu_caps.nr_cpus); 322 323 debug_printf("util_cpu_caps.x86_cpu_type = %u\n", util_cpu_caps.x86_cpu_type); 324 debug_printf("util_cpu_caps.cacheline = %u\n", util_cpu_caps.cacheline); 325 326 debug_printf("util_cpu_caps.has_tsc = %u\n", util_cpu_caps.has_tsc); 327 debug_printf("util_cpu_caps.has_mmx = %u\n", util_cpu_caps.has_mmx); 328 debug_printf("util_cpu_caps.has_mmx2 = %u\n", util_cpu_caps.has_mmx2); 329 debug_printf("util_cpu_caps.has_sse = %u\n", util_cpu_caps.has_sse); 330 debug_printf("util_cpu_caps.has_sse2 = %u\n", util_cpu_caps.has_sse2); 331 debug_printf("util_cpu_caps.has_sse3 = %u\n", util_cpu_caps.has_sse3); 332 debug_printf("util_cpu_caps.has_ssse3 = %u\n", util_cpu_caps.has_ssse3); 333 debug_printf("util_cpu_caps.has_sse4_1 = %u\n", util_cpu_caps.has_sse4_1); 334 debug_printf("util_cpu_caps.has_sse4_2 = %u\n", util_cpu_caps.has_sse4_2); 335 debug_printf("util_cpu_caps.has_avx = %u\n", util_cpu_caps.has_avx); 336 debug_printf("util_cpu_caps.has_3dnow = %u\n", util_cpu_caps.has_3dnow); 337 debug_printf("util_cpu_caps.has_3dnow_ext = %u\n", util_cpu_caps.has_3dnow_ext); 338 debug_printf("util_cpu_caps.has_altivec = %u\n", util_cpu_caps.has_altivec); 339 } 340 #endif 341 342 util_cpu_detect_initialized = TRUE; 343 } 344
