1 /**************************************************************************
3 * Copyright 2008 Dennis Smit
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:
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
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.
25 **************************************************************************/
29 * CPU feature detection.
32 * @author Based on the work of Eric Anholt <anholt@FreeBSD.org>
35 #include "pipe/p_config.h"
38 #include "u_cpu_detect.h"
40 #if defined(PIPE_ARCH_PPC)
41 #if defined(PIPE_OS_APPLE)
42 #include <sys/sysctl.h>
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>
55 #if defined(PIPE_OS_FREEBSD)
56 #include <sys/types.h>
57 #include <sys/sysctl.h>
60 #if defined(PIPE_OS_LINUX)
68 #if defined(PIPE_OS_WINDOWS)
70 #if defined(PIPE_CC_MSVC)
77 DEBUG_GET_ONCE_BOOL_OPTION(dump_cpu
, "GALLIUM_DUMP_CPU", FALSE
)
81 struct util_cpu_caps util_cpu_caps
;
83 #if defined(PIPE_ARCH_X86) || defined(PIPE_ARCH_X86_64)
84 static int has_cpuid(void);
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;
93 sigill_handler(int sig
)
95 if (!__lv_powerpc_canjump
) {
96 signal (sig
, SIG_DFL
);
100 __lv_powerpc_canjump
= 0;
101 longjmp(__lv_powerpc_jmpbuf
, 1);
105 #if defined(PIPE_ARCH_PPC)
107 check_os_altivec_support(void)
109 #if defined(PIPE_OS_APPLE)
110 int sels
[2] = {CTL_HW
, HW_VECTORUNIT
};
112 int len
= sizeof (has_vu
);
115 err
= sysctl(sels
, 2, &has_vu
, &len
, NULL
, 0);
119 util_cpu_caps
.has_altivec
= 1;
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
);
129 __lv_powerpc_canjump
= 1;
133 "vand %%v0, %%v0, %%v0"
137 signal(SIGILL
, SIG_DFL
);
138 util_cpu_caps
.has_altivec
= 1;
140 #endif /* !PIPE_OS_APPLE */
142 #endif /* PIPE_ARCH_PPC */
145 #if defined(PIPE_ARCH_X86) || defined (PIPE_ARCH_X86_64)
146 static int has_cpuid(void)
148 #if defined(PIPE_ARCH_X86)
149 #if defined(PIPE_OS_GCC)
156 "xorl $0x200000, %0\n"
170 #elif defined(PIPE_ARCH_X86_64)
179 * @sa cpuid.h included in gcc-4.3 onwards.
180 * @sa http://msdn.microsoft.com/en-us/library/hskdteyh.aspx
183 cpuid(uint32_t ax
, uint32_t *p
)
185 #if defined(PIPE_CC_GCC) && defined(PIPE_ARCH_X86)
187 "xchgl %%ebx, %1\n\t"
196 #elif defined(PIPE_CC_GCC) && defined(PIPE_ARCH_X86_64)
205 #elif defined(PIPE_CC_MSVC)
216 * @sa cpuid.h included in gcc-4.4 onwards.
217 * @sa http://msdn.microsoft.com/en-us/library/hskdteyh%28v=vs.90%29.aspx
220 cpuid_count(uint32_t ax
, uint32_t cx
, uint32_t *p
)
222 #if defined(PIPE_CC_GCC) && defined(PIPE_ARCH_X86)
224 "xchgl %%ebx, %1\n\t"
233 #elif defined(PIPE_CC_GCC) && defined(PIPE_ARCH_X86_64)
242 #elif defined(PIPE_CC_MSVC)
243 __cpuidex(p
, ax
, cx
);
253 static inline uint64_t xgetbv(void)
255 #if defined(PIPE_CC_GCC)
259 ".byte 0x0f, 0x01, 0xd0" // xgetbv isn't supported on gcc < 4.4
265 return ((uint64_t)edx
<< 32) | eax
;
266 #elif defined(PIPE_CC_MSVC) && defined(_MSC_FULL_VER) && defined(_XCR_XFEATURE_ENABLED_MASK)
267 return _xgetbv(_XCR_XFEATURE_ENABLED_MASK
);
274 #if defined(PIPE_ARCH_X86)
275 PIPE_ALIGN_STACK
static inline boolean
sse2_has_daz(void)
280 uint32_t pad2
[128-8];
281 } PIPE_ALIGN_VAR(16) fxarea
;
283 fxarea
.mxcsr_mask
= 0;
284 #if defined(PIPE_CC_GCC)
285 __asm
__volatile ("fxsave %0" : "+m" (fxarea
));
286 #elif (defined(PIPE_CC_MSVC) && _MSC_VER >= 1700) || defined(PIPE_CC_ICL)
287 /* 1700 = Visual Studio 2012 */
290 fxarea
.mxcsr_mask
= 0;
292 return !!(fxarea
.mxcsr_mask
& (1 << 6));
296 #endif /* X86 or X86_64 */
299 util_cpu_detect(void)
301 static boolean util_cpu_detect_initialized
= FALSE
;
303 if(util_cpu_detect_initialized
)
306 memset(&util_cpu_caps
, 0, sizeof util_cpu_caps
);
308 /* Count the number of CPUs in system */
309 #if defined(PIPE_OS_WINDOWS)
311 SYSTEM_INFO system_info
;
312 GetSystemInfo(&system_info
);
313 util_cpu_caps
.nr_cpus
= system_info
.dwNumberOfProcessors
;
315 #elif defined(PIPE_OS_UNIX) && defined(_SC_NPROCESSORS_ONLN)
316 util_cpu_caps
.nr_cpus
= sysconf(_SC_NPROCESSORS_ONLN
);
317 if (util_cpu_caps
.nr_cpus
== -1)
318 util_cpu_caps
.nr_cpus
= 1;
319 #elif defined(PIPE_OS_BSD)
328 sysctl(mib
, 2, &ncpu
, &len
, NULL
, 0);
329 util_cpu_caps
.nr_cpus
= ncpu
;
332 util_cpu_caps
.nr_cpus
= 1;
335 /* Make the fallback cacheline size nonzero so that it can be
336 * safely passed to align().
338 util_cpu_caps
.cacheline
= sizeof(void *);
340 #if defined(PIPE_ARCH_X86) || defined(PIPE_ARCH_X86_64)
345 util_cpu_caps
.cacheline
= 32;
347 /* Get max cpuid level */
348 cpuid(0x00000000, regs
);
350 if (regs
[0] >= 0x00000001) {
351 unsigned int cacheline
;
353 cpuid (0x00000001, regs2
);
355 util_cpu_caps
.x86_cpu_type
= (regs2
[0] >> 8) & 0xf;
356 if (util_cpu_caps
.x86_cpu_type
== 0xf)
357 util_cpu_caps
.x86_cpu_type
= 8 + ((regs2
[0] >> 20) & 255); /* use extended family (P4, IA64) */
359 /* general feature flags */
360 util_cpu_caps
.has_tsc
= (regs2
[3] >> 4) & 1; /* 0x0000010 */
361 util_cpu_caps
.has_mmx
= (regs2
[3] >> 23) & 1; /* 0x0800000 */
362 util_cpu_caps
.has_sse
= (regs2
[3] >> 25) & 1; /* 0x2000000 */
363 util_cpu_caps
.has_sse2
= (regs2
[3] >> 26) & 1; /* 0x4000000 */
364 util_cpu_caps
.has_sse3
= (regs2
[2] >> 0) & 1; /* 0x0000001 */
365 util_cpu_caps
.has_ssse3
= (regs2
[2] >> 9) & 1; /* 0x0000020 */
366 util_cpu_caps
.has_sse4_1
= (regs2
[2] >> 19) & 1;
367 util_cpu_caps
.has_sse4_2
= (regs2
[2] >> 20) & 1;
368 util_cpu_caps
.has_popcnt
= (regs2
[2] >> 23) & 1;
369 util_cpu_caps
.has_avx
= ((regs2
[2] >> 28) & 1) && // AVX
370 ((regs2
[2] >> 27) & 1) && // OSXSAVE
371 ((xgetbv() & 6) == 6); // XMM & YMM
372 util_cpu_caps
.has_f16c
= ((regs2
[2] >> 29) & 1) && util_cpu_caps
.has_avx
;
373 util_cpu_caps
.has_mmx2
= util_cpu_caps
.has_sse
; /* SSE cpus supports mmxext too */
374 #if defined(PIPE_ARCH_X86_64)
375 util_cpu_caps
.has_daz
= 1;
377 util_cpu_caps
.has_daz
= util_cpu_caps
.has_sse3
||
378 (util_cpu_caps
.has_sse2
&& sse2_has_daz());
381 cacheline
= ((regs2
[1] >> 8) & 0xFF) * 8;
383 util_cpu_caps
.cacheline
= cacheline
;
385 if (util_cpu_caps
.has_avx
&& regs
[0] >= 0x00000007) {
387 cpuid_count(0x00000007, 0x00000000, regs7
);
388 util_cpu_caps
.has_avx2
= (regs7
[1] >> 5) & 1;
391 if (regs
[1] == 0x756e6547 && regs
[2] == 0x6c65746e && regs
[3] == 0x49656e69) {
393 util_cpu_caps
.has_intel
= 1;
396 cpuid(0x80000000, regs
);
398 if (regs
[0] >= 0x80000001) {
400 cpuid(0x80000001, regs2
);
402 util_cpu_caps
.has_mmx
|= (regs2
[3] >> 23) & 1;
403 util_cpu_caps
.has_mmx2
|= (regs2
[3] >> 22) & 1;
404 util_cpu_caps
.has_3dnow
= (regs2
[3] >> 31) & 1;
405 util_cpu_caps
.has_3dnow_ext
= (regs2
[3] >> 30) & 1;
407 util_cpu_caps
.has_xop
= util_cpu_caps
.has_avx
&&
408 ((regs2
[2] >> 11) & 1);
411 if (regs
[0] >= 0x80000006) {
412 /* should we really do this if the clflush size above worked? */
413 unsigned int cacheline
;
414 cpuid(0x80000006, regs2
);
415 cacheline
= regs2
[2] & 0xFF;
417 util_cpu_caps
.cacheline
= cacheline
;
420 if (!util_cpu_caps
.has_sse
) {
421 util_cpu_caps
.has_sse2
= 0;
422 util_cpu_caps
.has_sse3
= 0;
423 util_cpu_caps
.has_ssse3
= 0;
424 util_cpu_caps
.has_sse4_1
= 0;
427 #endif /* PIPE_ARCH_X86 || PIPE_ARCH_X86_64 */
429 #if defined(PIPE_ARCH_PPC)
430 check_os_altivec_support();
431 #endif /* PIPE_ARCH_PPC */
434 if (debug_get_option_dump_cpu()) {
435 debug_printf("util_cpu_caps.nr_cpus = %u\n", util_cpu_caps
.nr_cpus
);
437 debug_printf("util_cpu_caps.x86_cpu_type = %u\n", util_cpu_caps
.x86_cpu_type
);
438 debug_printf("util_cpu_caps.cacheline = %u\n", util_cpu_caps
.cacheline
);
440 debug_printf("util_cpu_caps.has_tsc = %u\n", util_cpu_caps
.has_tsc
);
441 debug_printf("util_cpu_caps.has_mmx = %u\n", util_cpu_caps
.has_mmx
);
442 debug_printf("util_cpu_caps.has_mmx2 = %u\n", util_cpu_caps
.has_mmx2
);
443 debug_printf("util_cpu_caps.has_sse = %u\n", util_cpu_caps
.has_sse
);
444 debug_printf("util_cpu_caps.has_sse2 = %u\n", util_cpu_caps
.has_sse2
);
445 debug_printf("util_cpu_caps.has_sse3 = %u\n", util_cpu_caps
.has_sse3
);
446 debug_printf("util_cpu_caps.has_ssse3 = %u\n", util_cpu_caps
.has_ssse3
);
447 debug_printf("util_cpu_caps.has_sse4_1 = %u\n", util_cpu_caps
.has_sse4_1
);
448 debug_printf("util_cpu_caps.has_sse4_2 = %u\n", util_cpu_caps
.has_sse4_2
);
449 debug_printf("util_cpu_caps.has_avx = %u\n", util_cpu_caps
.has_avx
);
450 debug_printf("util_cpu_caps.has_avx2 = %u\n", util_cpu_caps
.has_avx2
);
451 debug_printf("util_cpu_caps.has_f16c = %u\n", util_cpu_caps
.has_f16c
);
452 debug_printf("util_cpu_caps.has_popcnt = %u\n", util_cpu_caps
.has_popcnt
);
453 debug_printf("util_cpu_caps.has_3dnow = %u\n", util_cpu_caps
.has_3dnow
);
454 debug_printf("util_cpu_caps.has_3dnow_ext = %u\n", util_cpu_caps
.has_3dnow_ext
);
455 debug_printf("util_cpu_caps.has_xop = %u\n", util_cpu_caps
.has_xop
);
456 debug_printf("util_cpu_caps.has_altivec = %u\n", util_cpu_caps
.has_altivec
);
457 debug_printf("util_cpu_caps.has_daz = %u\n", util_cpu_caps
.has_daz
);
461 util_cpu_detect_initialized
= TRUE
;