misc/cpu.c

   1 /*
   2  * What processor?
   3  *
   4  * Copyright 1995,1997 Morten Welinder
   5  * Copyright 1997-1998 Marcus Meissner
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include "config.h"
  23 #include "wine/port.h"
  24
  25 #ifdef HAVE_SYS_PARAM_H
  26 # include <sys/param.h>
  27 #endif
  28 #ifdef HAVE_SYS_SYSCTL_H
  29 # include <sys/sysctl.h>
  30 #endif
  31 #ifdef HAVE_MACHINE_CPU_H
  32 # include <machine/cpu.h>
  33 #endif
  34
  35 #include <ctype.h>
  36 #include <string.h>
  37 #include <stdio.h>
  38 #include <stdlib.h>
  39 #ifdef HAVE_SYS_TIME_H
  40 # include <sys/time.h>
  41 #endif
  42
  43
  44 #define NONAMELESSUNION
  45 #define NONAMELESSSTRUCT
  46 #include "winbase.h"
  47 #include "winnt.h"
  48 #include "winternl.h"
  49 #include "winerror.h"
  50 #include "wine/unicode.h"
  51 #include "wine/debug.h"
  52
  53 WINE_DEFAULT_DEBUG_CHANNEL(reg);
  54
  55 #define AUTH    0x68747541      /* "Auth" */
  56 #define ENTI    0x69746e65      /* "enti" */
  57 #define CAMD    0x444d4163      /* "cAMD" */
  58
  59 /* Calls cpuid with an eax of 'ax' and returns the 16 bytes in *p
  60  * We are compiled with -fPIC, so we can't clobber ebx.
  61  */
  62 static inline void do_cpuid(int ax, int *p)
  63 {
  64 #ifdef __i386__
  65         __asm__("pushl %%ebx\n\t"
  66                 "cpuid\n\t"
  67                 "movl %%ebx, %%esi\n\t"
  68                 "popl %%ebx"
  69                 : "=a" (p[0]), "=S" (p[1]), "=c" (p[2]), "=d" (p[3])
  70                 :  "0" (ax));
  71 #endif
  72 }
  73
  74 /* From xf86info havecpuid.c 1.11 */
  75 static inline int have_cpuid(void)
  76 {
  77 #ifdef __i386__
  78         unsigned int f1, f2;
  79         __asm__("pushfl\n\t"
  80                 "pushfl\n\t"
  81                 "popl %0\n\t"
  82                 "movl %0,%1\n\t"
  83                 "xorl %2,%0\n\t"
  84                 "pushl %0\n\t"
  85                 "popfl\n\t"
  86                 "pushfl\n\t"
  87                 "popl %0\n\t"
  88                 "popfl"
  89                 : "=&r" (f1), "=&r" (f2)
  90                 : "ir" (0x00200000));
  91         return ((f1^f2) & 0x00200000) != 0;
  92 #else
  93         return 0;
  94 #endif
  95 }
  96
  97 static BYTE PF[64] = {0,};
  98 static ULONGLONG cpuHz = 1000000000; /* default to a 1GHz */
  99
 100 static void create_registry_keys( const SYSTEM_INFO *info )
 101 {
 102     static const WCHAR SystemW[] = {'M','a','c','h','i','n','e','\\',
 103                                     'H','a','r','d','w','a','r','e','\\',
 104                                     'D','e','s','c','r','i','p','t','i','o','n','\\',
 105                                     'S','y','s','t','e','m',0};
 106     static const WCHAR fpuW[] = {'F','l','o','a','t','i','n','g','P','o','i','n','t','P','r','o','c','e','s','s','o','r',0};
 107     static const WCHAR cpuW[] = {'C','e','n','t','r','a','l','P','r','o','c','e','s','s','o','r',0};
 108     static const WCHAR IdentifierW[] = {'I','d','e','n','t','i','f','i','e','r',0};
 109     static const WCHAR SysidW[] = {'A','T',' ','c','o','m','p','a','t','i','b','l','e',0};
 110     static const WCHAR mhzKeyW[] = {'~','M','H','z',0};
 111
 112     int i;
 113     HKEY hkey, system_key, cpu_key;
 114     OBJECT_ATTRIBUTES attr;
 115     UNICODE_STRING nameW, valueW;
 116
 117     attr.Length = sizeof(attr);
 118     attr.RootDirectory = 0;
 119     attr.ObjectName = &nameW;
 120     attr.Attributes = 0;
 121     attr.SecurityDescriptor = NULL;
 122     attr.SecurityQualityOfService = NULL;
 123
 124     RtlInitUnicodeString( &nameW, SystemW );
 125     if (NtCreateKey( &system_key, KEY_ALL_ACCESS, &attr, 0, NULL, 0, NULL )) return;
 126
 127     RtlInitUnicodeString( &valueW, IdentifierW );
 128     NtSetValueKey( system_key, &valueW, 0, REG_SZ, SysidW, (strlenW(SysidW)+1) * sizeof(WCHAR) );
 129
 130     attr.RootDirectory = system_key;
 131     RtlInitUnicodeString( &nameW, fpuW );
 132     if (!NtCreateKey( &hkey, KEY_ALL_ACCESS, &attr, 0, NULL, 0, NULL )) NtClose( hkey );
 133
 134     RtlInitUnicodeString( &nameW, cpuW );
 135     if (!NtCreateKey( &cpu_key, KEY_ALL_ACCESS, &attr, 0, NULL, 0, NULL ))
 136     {
 137         for (i = 0; i < info->dwNumberOfProcessors; i++)
 138         {
 139             char num[10], id[20];
 140
 141             attr.RootDirectory = cpu_key;
 142             sprintf( num, "%d", i );
 143             RtlCreateUnicodeStringFromAsciiz( &nameW, num );
 144             if (!NtCreateKey( &hkey, KEY_ALL_ACCESS, &attr, 0, NULL, 0, NULL ))
 145             {
 146                 WCHAR idW[20];
 147                 DWORD cpuMHz = cpuHz / 1000000;
 148
 149                 sprintf( id, "CPU %ld", info->dwProcessorType );
 150                 RtlMultiByteToUnicodeN( idW, sizeof(idW), NULL, id, strlen(id)+1 );
 151                 NtSetValueKey( hkey, &valueW, 0, REG_SZ, idW, (strlenW(idW)+1)*sizeof(WCHAR) );
 152
 153                 RtlInitUnicodeString( &valueW, mhzKeyW );
 154                 NtSetValueKey( hkey, &valueW, 0, REG_DWORD, &cpuMHz, sizeof(DWORD) );
 155                 NtClose( hkey );
 156             }
 157             RtlFreeUnicodeString( &nameW );
 158         }
 159         NtClose( cpu_key );
 160     }
 161     NtClose( system_key );
 162 }
 163
 164 /****************************************************************************
 165  *              QueryPerformanceCounter (KERNEL32.@)
 166  */
 167 BOOL WINAPI QueryPerformanceCounter(PLARGE_INTEGER counter)
 168 {
 169     struct timeval tv;
 170
 171 #if defined(__i386__) && defined(__GNUC__)
 172     if (IsProcessorFeaturePresent( PF_RDTSC_INSTRUCTION_AVAILABLE )) {
 173         /* i586 optimized version */
 174         __asm__ __volatile__ ( "rdtsc"
 175                                : "=a" (counter->s.LowPart), "=d" (counter->s.HighPart) );
 176         counter->QuadPart = counter->QuadPart / 1000; /* see below */
 177         return TRUE;
 178     }
 179 #endif
 180
 181     /* fall back to generic routine (ie, for i386, i486) */
 182     gettimeofday( &tv, NULL );
 183     counter->QuadPart = (LONGLONG)tv.tv_usec + (LONGLONG)tv.tv_sec * 1000000;
 184     return TRUE;
 185 }
 186
 187
 188 /****************************************************************************
 189  *              QueryPerformanceFrequency (KERNEL32.@)
 190  */
 191 BOOL WINAPI QueryPerformanceFrequency(PLARGE_INTEGER frequency)
 192 {
 193 #if defined(__i386__) && defined(__GNUC__)
 194     if (IsProcessorFeaturePresent( PF_RDTSC_INSTRUCTION_AVAILABLE )) {
 195         /* The way Windows calculates this value is unclear, however simply using the CPU frequency
 196            gives a value out by approximately a thousand. That can cause some applications to crash,
 197            so we divide here to make our number more similar to the one Windows gives  */
 198         frequency->QuadPart = cpuHz / 1000;
 199         return TRUE;
 200     }
 201 #endif
 202     frequency->s.LowPart  = 1000000;
 203     frequency->s.HighPart = 0;
 204     return TRUE;
 205 }
 206
 207
 208 /***********************************************************************
 209  *                      GetSystemInfo                   [KERNEL32.@]
 210  *
 211  * Gets the current system information.
 212  *
 213  * On the first call it creates cached values, so it doesn't have to determine
 214  * them repeatedly. On Linux, the /proc/cpuinfo special file is used.
 215  *
 216  * It creates a registry subhierarchy, looking like:
 217  * \HARDWARE\DESCRIPTION\System\CentralProcessor\<processornumber>\
 218  *                                                      Identifier (CPU x86)
 219  * Note that there is a hierarchy for every processor installed, so this
 220  * supports multiprocessor systems. This is done like Win95 does it, I think.
 221  *
 222  * It also creates a cached flag array for IsProcessorFeaturePresent().
 223  *
 224  * No NULL ptr check for LPSYSTEM_INFO in Win9x.
 225  *
 226  * RETURNS
 227  *      nothing, really
 228  */
 229 VOID WINAPI GetSystemInfo(
 230         LPSYSTEM_INFO si        /* [out] system information */
 231 ) {
 232         static int cache = 0;
 233         static SYSTEM_INFO cachedsi;
 234
 235         TRACE("si=0x%p\n", si);
 236         if (cache) {
 237                 memcpy(si,&cachedsi,sizeof(*si));
 238                 return;
 239         }
 240         memset(PF,0,sizeof(PF));
 241
 242         /* choose sensible defaults ...
 243          * FIXME: perhaps overrideable with precompiler flags?
 244          */
 245         cachedsi.u.s.wProcessorArchitecture     = PROCESSOR_ARCHITECTURE_INTEL;
 246         cachedsi.dwPageSize                     = getpagesize();
 247
 248         /* FIXME: the two entries below should be computed somehow... */
 249         cachedsi.lpMinimumApplicationAddress    = (void *)0x00010000;
 250         cachedsi.lpMaximumApplicationAddress    = (void *)0x7FFFFFFF;
 251         cachedsi.dwActiveProcessorMask          = 1;
 252         cachedsi.dwNumberOfProcessors           = 1;
 253         cachedsi.dwProcessorType                = PROCESSOR_INTEL_PENTIUM;
 254         cachedsi.dwAllocationGranularity        = 0x10000;
 255         cachedsi.wProcessorLevel                = 5; /* 586 */
 256         cachedsi.wProcessorRevision             = 0;
 257
 258         cache = 1; /* even if there is no more info, we now have a cacheentry */
 259         memcpy(si,&cachedsi,sizeof(*si));
 260
 261         /* Hmm, reasonable processor feature defaults? */
 262
 263 #ifdef linux
 264         {
 265         char line[200];
 266         FILE *f = fopen ("/proc/cpuinfo", "r");
 267
 268         if (!f)
 269                 return;
 270         while (fgets(line,200,f)!=NULL) {
 271                 char    *s,*value;
 272
 273                 /* NOTE: the ':' is the only character we can rely on */
 274                 if (!(value = strchr(line,':')))
 275                         continue;
 276
 277                 /* terminate the valuename */
 278                 s = value - 1;
 279                 while ((s >= line) && ((*s == ' ') || (*s == '\t'))) s--;
 280                 *(s + 1) = '\0';
 281
 282                 /* and strip leading spaces from value */
 283                 value += 1;
 284                 while (*value==' ') value++;
 285                 if ((s=strchr(value,'\n')))
 286                         *s='\0';
 287
 288                 /* 2.1 method */
 289                 if (!strcasecmp(line, "cpu family")) {
 290                         if (isdigit (value[0])) {
 291                                 switch (value[0] - '0') {
 292                                 case 3: cachedsi.dwProcessorType = PROCESSOR_INTEL_386;
 293                                         cachedsi.wProcessorLevel= 3;
 294                                         break;
 295                                 case 4: cachedsi.dwProcessorType = PROCESSOR_INTEL_486;
 296                                         cachedsi.wProcessorLevel= 4;
 297                                         break;
 298                                 case 5:
 299                                 case 6: /* PPro/2/3 has same info as P1 */
 300                                         cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
 301                                         cachedsi.wProcessorLevel= 5;
 302                                         break;
 303                                 case 1: /* two-figure levels */
 304                                     if (value[1] == '5')
 305                                     {
 306                                         cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
 307                                         cachedsi.wProcessorLevel= 5;
 308                                         break;
 309                                     }
 310                                     /* fall through */
 311                                 default:
 312                                         FIXME("unknown cpu family '%s', please report ! (-> setting to 386)\n", value);
 313                                         break;
 314                                 }
 315                         }
 316                         continue;
 317                 }
 318                 /* old 2.0 method */
 319                 if (!strcasecmp(line, "cpu")) {
 320                         if (    isdigit (value[0]) && value[1] == '8' &&
 321                                 value[2] == '6' && value[3] == 0
 322                         ) {
 323                                 switch (value[0] - '0') {
 324                                 case 3: cachedsi.dwProcessorType = PROCESSOR_INTEL_386;
 325                                         cachedsi.wProcessorLevel= 3;
 326                                         break;
 327                                 case 4: cachedsi.dwProcessorType = PROCESSOR_INTEL_486;
 328                                         cachedsi.wProcessorLevel= 4;
 329                                         break;
 330                                 case 5:
 331                                 case 6: /* PPro/2/3 has same info as P1 */
 332                                         cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
 333                                         cachedsi.wProcessorLevel= 5;
 334                                         break;
 335                                 default:
 336                                         FIXME("unknown Linux 2.0 cpu family '%s', please report ! (-> setting to 386)\n", value);
 337                                         break;
 338                                 }
 339                         }
 340                         continue;
 341                 }
 342                 if (!strcasecmp(line,"fdiv_bug")) {
 343                         if (!strncasecmp(value,"yes",3))
 344                                 PF[PF_FLOATING_POINT_PRECISION_ERRATA] = TRUE;
 345
 346                         continue;
 347                 }
 348                 if (!strcasecmp(line,"fpu")) {
 349                         if (!strncasecmp(value,"no",2))
 350                                 PF[PF_FLOATING_POINT_EMULATED] = TRUE;
 351
 352                         continue;
 353                 }
 354                 if (!strcasecmp(line,"processor")) {
 355                         /* processor number counts up... */
 356                         unsigned int x;
 357
 358                         if (sscanf(value,"%d",&x))
 359                                 if (x+1>cachedsi.dwNumberOfProcessors)
 360                                         cachedsi.dwNumberOfProcessors=x+1;
 361
 362                         continue;
 363                 }
 364                 if (!strcasecmp(line,"stepping")) {
 365                         int     x;
 366
 367                         if (sscanf(value,"%d",&x))
 368                                 cachedsi.wProcessorRevision = x;
 369
 370                         continue;
 371                 }
 372                 if (!strcasecmp(line, "cpu MHz")) {
 373                         double cmz;
 374                         if (sscanf( value, "%lf", &cmz ) == 1) {
 375                                 /* SYSTEMINFO doesn't have a slot for cpu speed, so store in a global */
 376                                 cpuHz = cmz * 1000 * 1000;
 377                                 TRACE("CPU speed read as %lld\n", cpuHz);
 378                         }
 379                         continue;
 380                 }
 381                 if (    !strcasecmp(line,"flags")       ||
 382                         !strcasecmp(line,"features")
 383                 ) {
 384                         if (strstr(value,"cx8"))
 385                                 PF[PF_COMPARE_EXCHANGE_DOUBLE] = TRUE;
 386                         if (strstr(value,"mmx"))
 387                                 PF[PF_MMX_INSTRUCTIONS_AVAILABLE] = TRUE;
 388                         if (strstr(value,"tsc"))
 389                                 PF[PF_RDTSC_INSTRUCTION_AVAILABLE] = TRUE;
 390                         if (strstr(value,"3dnow"))
 391                                 PF[PF_3DNOW_INSTRUCTIONS_AVAILABLE] = TRUE;
 392                         /* This will also catch sse2, but we have sse itself
 393                          * if we have sse2, so no problem */
 394                         if (strstr(value,"sse"))
 395                                 PF[PF_XMMI_INSTRUCTIONS_AVAILABLE] = TRUE;
 396                         if (strstr(value,"sse2"))
 397                                 PF[PF_XMMI64_INSTRUCTIONS_AVAILABLE] = TRUE;
 398                         if (strstr(value,"pae"))
 399                                 PF[PF_PAE_ENABLED] = TRUE;
 400
 401                         continue;
 402                 }
 403         }
 404         fclose (f);
 405         }
 406         memcpy(si,&cachedsi,sizeof(*si));
 407 #elif defined (__NetBSD__)
 408         {
 409              int mib[2];
 410              int value[2];
 411              char model[256];
 412              char *cpuclass;
 413              FILE *f = fopen ("/var/run/dmesg.boot", "r");
 414
 415              /* first deduce as much as possible from the sysctls */
 416              mib[0] = CTL_MACHDEP;
 417 #ifdef CPU_FPU_PRESENT
 418              mib[1] = CPU_FPU_PRESENT;
 419              value[1] = sizeof(int);
 420              if (sysctl(mib, 2, value, value+1, NULL, 0) >= 0)
 421                  if (value) PF[PF_FLOATING_POINT_EMULATED] = FALSE;
 422                  else       PF[PF_FLOATING_POINT_EMULATED] = TRUE;
 423 #endif
 424 #ifdef CPU_SSE
 425              mib[1] = CPU_SSE;   /* this should imply MMX */
 426              value[1] = sizeof(int);
 427              if (sysctl(mib, 2, value, value+1, NULL, 0) >= 0)
 428                  if (value) PF[PF_MMX_INSTRUCTIONS_AVAILABLE] = TRUE;
 429 #endif
 430 #ifdef CPU_SSE2
 431              mib[1] = CPU_SSE2;  /* this should imply MMX */
 432              value[1] = sizeof(int);
 433              if (sysctl(mib, 2, value, value+1, NULL, 0) >= 0)
 434                  if (value) PF[PF_MMX_INSTRUCTIONS_AVAILABLE] = TRUE;
 435 #endif
 436              mib[0] = CTL_HW;
 437              mib[1] = HW_NCPU;
 438              value[1] = sizeof(int);
 439              if (sysctl(mib, 2, value, value+1, NULL, 0) >= 0)
 440                  if (value[0] > cachedsi.dwNumberOfProcessors)
 441                     cachedsi.dwNumberOfProcessors = value[0];
 442              mib[1] = HW_MODEL;
 443              value[1] = 255;
 444              if (sysctl(mib, 2, model, value+1, NULL, 0) >= 0) {
 445                   model[value[1]] = '\0'; /* just in case */
 446                   cpuclass = strstr(model, "-class");
 447                   if (cpuclass != NULL) {
 448                        while(cpuclass > model && cpuclass[0] != '(') cpuclass--;
 449                        if (!strncmp(cpuclass+1, "386", 3)) {
 450                             cachedsi.dwProcessorType = PROCESSOR_INTEL_386;
 451                             cachedsi.wProcessorLevel= 3;
 452                        }
 453                        if (!strncmp(cpuclass+1, "486", 3)) {
 454                             cachedsi.dwProcessorType = PROCESSOR_INTEL_486;
 455                             cachedsi.wProcessorLevel= 4;
 456                        }
 457                        if (!strncmp(cpuclass+1, "586", 3)) {
 458                             cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
 459                             cachedsi.wProcessorLevel= 5;
 460                        }
 461                        if (!strncmp(cpuclass+1, "686", 3)) {
 462                             cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
 463                             cachedsi.wProcessorLevel= 5;
 464                             /* this should imply MMX */
 465                             PF[PF_MMX_INSTRUCTIONS_AVAILABLE] = TRUE;
 466                        }
 467                   }
 468              }
 469
 470              /* it may be worth reading from /var/run/dmesg.boot for
 471                 additional information such as CX8, MMX and TSC
 472                 (however this information should be considered less
 473                  reliable than that from the sysctl calls) */
 474              if (f != NULL)
 475              {
 476                  while (fgets(model, 255, f) != NULL) {
 477                         if (sscanf(model,"cpu%d: features %x<", value, value+1) == 2) {
 478                             /* we could scan the string but it is easier
 479                                to test the bits directly */
 480                             if (value[1] & 0x1)
 481                                 PF[PF_FLOATING_POINT_EMULATED] = TRUE;
 482                             if (value[1] & 0x10)
 483                                 PF[PF_RDTSC_INSTRUCTION_AVAILABLE] = TRUE;
 484                             if (value[1] & 0x100)
 485                                 PF[PF_COMPARE_EXCHANGE_DOUBLE] = TRUE;
 486                             if (value[1] & 0x800000)
 487                                 PF[PF_MMX_INSTRUCTIONS_AVAILABLE] = TRUE;
 488
 489                             break;
 490                         }
 491                  }
 492                  fclose(f);
 493              }
 494
 495         }
 496         memcpy(si,&cachedsi,sizeof(*si));
 497 #elif defined(__FreeBSD__)
 498         {
 499         unsigned int regs[4], regs2[4];
 500         int ret, len, num;
 501         if (!have_cpuid())
 502                 regs[0] = 0;                    /* No cpuid support -- skip the rest */
 503         else
 504                 do_cpuid(0x00000000, regs);     /* get standard cpuid level and vendor name */
 505         if (regs[0]>=0x00000001) {              /* Check for supported cpuid version */
 506                 do_cpuid(0x00000001, regs2);    /* get cpu features */
 507                 switch ((regs2[0] >> 8)&0xf) {  /* cpu family */
 508                 case 3: cachedsi.dwProcessorType = PROCESSOR_INTEL_386;
 509                         cachedsi.wProcessorLevel = 3;
 510                         break;
 511                 case 4: cachedsi.dwProcessorType = PROCESSOR_INTEL_486;
 512                         cachedsi.wProcessorLevel = 4;
 513                         break;
 514                 case 5:
 515                 case 6:
 516                 case 15: /* PPro/2/3/4 has same info as P1 */
 517                         cachedsi.dwProcessorType = PROCESSOR_INTEL_PENTIUM;
 518                         cachedsi.wProcessorLevel = 5;
 519                         break;
 520                 default:
 521                         FIXME("unknown FreeBSD cpu family %d, please report! (-> setting to 386)\n", \
 522                                 (regs2[0] >> 8)&0xf);
 523                         break;
 524                 }
 525                 PF[PF_FLOATING_POINT_EMULATED]     = !(regs2[3] & 1);
 526                 PF[PF_RDTSC_INSTRUCTION_AVAILABLE] = (regs2[3] & (1 << 4 )) >> 4;
 527                 PF[PF_COMPARE_EXCHANGE_DOUBLE]     = (regs2[3] & (1 << 8 )) >> 8;
 528                 PF[PF_MMX_INSTRUCTIONS_AVAILABLE]  = (regs2[3] & (1 << 23)) >> 23;
 529                 /* Check for OS support of SSE -- Is this used, and should it be sse1 or sse2? */
 530                 /*len = sizeof(num);
 531                 ret = sysctlbyname("hw.instruction_sse", &num, &len, NULL, 0);
 532                 if (!ret)
 533                         PF[PF_XMMI_INSTRUCTIONS_AVAILABLE] = num;*/
 534
 535                 if (regs[1] == AUTH &&
 536                     regs[3] == ENTI &&
 537                     regs[2] == CAMD) {
 538                         do_cpuid(0x80000000, regs);             /* get vendor cpuid level */
 539                         if (regs[0]>=0x80000001) {
 540                                 do_cpuid(0x80000001, regs2);    /* get vendor features */
 541                                 PF[PF_3DNOW_INSTRUCTIONS_AVAILABLE] =
 542                                     (regs2[3] & (1 << 31 )) >> 31;
 543                         }
 544                 }
 545         }
 546         len = sizeof(num);
 547         ret = sysctlbyname("hw.ncpu", &num, &len, NULL, 0);
 548         if (!ret)
 549                 cachedsi.dwNumberOfProcessors = num;
 550         }
 551         memcpy(si,&cachedsi,sizeof(*si));
 552 #else
 553         FIXME("not yet supported on this system\n");
 554 #endif
 555         TRACE("<- CPU arch %d, res'd %d, pagesize %ld, minappaddr %p, maxappaddr %p,"
 556               " act.cpumask %08lx, numcpus %ld, CPU type %ld, allocgran. %ld, CPU level %d, CPU rev %d\n",
 557               si->u.s.wProcessorArchitecture, si->u.s.wReserved, si->dwPageSize,
 558               si->lpMinimumApplicationAddress, si->lpMaximumApplicationAddress,
 559               si->dwActiveProcessorMask, si->dwNumberOfProcessors, si->dwProcessorType,
 560               si->dwAllocationGranularity, si->wProcessorLevel, si->wProcessorRevision);
 561
 562         create_registry_keys( &cachedsi );
 563 }
 564
 565
 566 /***********************************************************************
 567  *                      IsProcessorFeaturePresent       [KERNEL32.@]
 568  * RETURNS:
 569  *      TRUE if processor feature present
 570  *      FALSE otherwise
 571  */
 572 BOOL WINAPI IsProcessorFeaturePresent (
 573         DWORD feature   /* [in] feature number, see PF_ defines */
 574 ) {
 575   SYSTEM_INFO si;
 576   GetSystemInfo (&si); /* To ensure the information is loaded and cached */
 577
 578   if (feature < 64)
 579     return PF[feature];
 580   else
 581     return FALSE;
 582 }