Commit | Line | Data |
---|---|---|
08e2be29 MW |
1 | /* -*-c-*- |
2 | * | |
3 | * CPU-specific dispatch | |
4 | * | |
5 | * (c) 2015 Straylight/Edgeware | |
6 | */ | |
7 | ||
8 | /*----- Licensing notice --------------------------------------------------* | |
9 | * | |
10 | * This file is part of Catacomb. | |
11 | * | |
12 | * Catacomb is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU Library General Public License as | |
14 | * published by the Free Software Foundation; either version 2 of the | |
15 | * License, or (at your option) any later version. | |
16 | * | |
17 | * Catacomb is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU Library General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU Library General Public | |
23 | * License along with Catacomb; if not, write to the Free | |
24 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, | |
25 | * MA 02111-1307, USA. | |
26 | */ | |
27 | ||
28 | /*----- Header files ------------------------------------------------------*/ | |
29 | ||
30 | #include "config.h" | |
31 | ||
0ed9f882 | 32 | #include <assert.h> |
08e2be29 | 33 | #include <ctype.h> |
fac645f7 MW |
34 | #include <stdarg.h> |
35 | #include <stdio.h> | |
08e2be29 MW |
36 | #include <stdlib.h> |
37 | #include <string.h> | |
38 | ||
39 | #include <mLib/macros.h> | |
40 | ||
41 | #include "dispatch.h" | |
42 | ||
d26ad211 | 43 | /*----- Intel x86/AMD64 feature probing -----------------------------------*/ |
08e2be29 | 44 | |
0f23f75f | 45 | #if CPUFAM_X86 || CPUFAM_AMD64 |
08e2be29 | 46 | |
0ed9f882 MW |
47 | enum { |
48 | CPUID_1_D, /* eax = 1 => edx&?? */ | |
7680f863 MW |
49 | # define CPUID1D_SSE2 (1u << 26) |
50 | # define CPUID1D_FXSR (1u << 24) | |
0ed9f882 MW |
51 | |
52 | CPUID_1_C, /* eax = 1 => ecx&?? */ | |
9e6a4409 MW |
53 | # define CPUID1C_PCLMUL (1u << 1) |
54 | # define CPUID1C_SSSE3 (1u << 9) | |
7680f863 | 55 | # define CPUID1C_AESNI (1u << 25) |
b9b279b4 | 56 | # define CPUID1C_AVX (1u << 28) |
d25653be | 57 | # define CPUID1C_RDRAND (1u << 30) |
08e2be29 | 58 | |
0ed9f882 MW |
59 | }; |
60 | ||
08e2be29 | 61 | struct cpuid { unsigned a, b, c, d; }; |
a3ad4421 MW |
62 | extern int dispatch_x86ish_cpuid(struct cpuid *, unsigned a, unsigned c); |
63 | extern int dispatch_x86ish_xmmregisters_p(void); | |
1b07c4f3 | 64 | extern int dispatch_x86ish_rdrand(unsigned op, unsigned *); |
08e2be29 MW |
65 | |
66 | static void cpuid(struct cpuid *cc, unsigned a, unsigned c) | |
67 | { | |
a3ad4421 MW |
68 | int rc = dispatch_x86ish_cpuid(cc, a, c); |
69 | if (rc) | |
fac645f7 | 70 | dispatch_debug("CPUID instruction not available"); |
a3ad4421 MW |
71 | else |
72 | dispatch_debug("CPUID(%08x, %08x) -> %08x, %08x, %08x, %08x", | |
73 | a, c, cc->a, cc->b, cc->c, cc->d); | |
08e2be29 MW |
74 | } |
75 | ||
76 | static unsigned cpuid_maxleaf(void) | |
77 | { struct cpuid c; cpuid(&c, 0, 0); return (c.a); } | |
78 | ||
0ed9f882 | 79 | /* --- @cpuid_feature_p@ --- * |
11b17977 | 80 | * |
0ed9f882 MW |
81 | * Arguments: @unsigned leaf@ = leaf to look up |
82 | * @unsigned bits@ = bits to check | |
11b17977 | 83 | * |
0ed9f882 MW |
84 | * Returns: Nonzero if all the requested bits are set in the requested |
85 | * CPUID result. | |
11b17977 MW |
86 | */ |
87 | ||
0ed9f882 | 88 | static int cpuid_feature_p(unsigned leaf, unsigned bits) |
08e2be29 MW |
89 | { |
90 | struct cpuid c; | |
0ed9f882 MW |
91 | unsigned r; |
92 | ||
93 | switch (leaf) { | |
94 | case CPUID_1_D: | |
95 | if (cpuid_maxleaf() < 1) return (0); | |
96 | cpuid(&c, 1, 0); r = c.d; | |
97 | break; | |
98 | case CPUID_1_C: | |
99 | if (cpuid_maxleaf() < 1) return (0); | |
100 | cpuid(&c, 1, 0); r = c.c; | |
101 | break; | |
102 | default: | |
103 | assert(!"unknown cpuid leaf"); | |
104 | } | |
105 | return ((r&bits) == bits); | |
08e2be29 MW |
106 | } |
107 | ||
11b17977 MW |
108 | /* --- @xmm_registers_available_p@ --- * |
109 | * | |
110 | * Arguments: --- | |
111 | * | |
112 | * Returns: Nonzero if the operating system has made the XMM registers | |
113 | * available for use. | |
114 | */ | |
115 | ||
acbe16df MW |
116 | static int xmm_registers_available_p(void) |
117 | { | |
a3ad4421 MW |
118 | int f = dispatch_x86ish_xmmregisters_p(); |
119 | ||
0f23f75f | 120 | dispatch_debug("XMM registers %savailable", f ? "" : "not "); |
acbe16df | 121 | return (f); |
acbe16df MW |
122 | } |
123 | ||
35b1eba8 MW |
124 | /* --- @rdrand_works_p@ --- * |
125 | * | |
126 | * | |
127 | * Arguments: --- | |
128 | * | |
129 | * Returns: Nonzero if the `rdrand' instruction actually works. Assumes | |
130 | * that it's already been verified to be safe to issue. | |
131 | */ | |
132 | ||
1b07c4f3 MW |
133 | enum { OP_RDRAND, OP_RDSEED }; |
134 | ||
135 | static int rdrand_works_p(unsigned op) | |
35b1eba8 MW |
136 | { |
137 | unsigned ref, x, i; | |
1b07c4f3 MW |
138 | const char *what; |
139 | ||
140 | switch (op) { | |
141 | case OP_RDRAND: what = "RDRAND"; break; | |
142 | default: assert(!"unexpected op"); | |
143 | } | |
35b1eba8 MW |
144 | |
145 | /* Check that it doesn't always give the same answer. Try four times: this | |
146 | * will fail with probability %$2^{-128}$% with a truly random generator, | |
147 | * which seems fair enough. | |
148 | */ | |
1b07c4f3 | 149 | if (dispatch_x86ish_rdrand(op, &ref)) goto fail; |
35b1eba8 | 150 | for (i = 0; i < 4; i++) { |
1b07c4f3 | 151 | if (dispatch_x86ish_rdrand(op, &x)) goto fail; |
35b1eba8 MW |
152 | if (x != ref) goto not_stuck; |
153 | } | |
1b07c4f3 | 154 | dispatch_debug("%s always returns 0x%08x!", what, ref); |
35b1eba8 MW |
155 | return (0); |
156 | ||
157 | not_stuck: | |
1b07c4f3 | 158 | dispatch_debug("%s instruction looks plausible", what); |
35b1eba8 MW |
159 | return (1); |
160 | ||
161 | fail: | |
1b07c4f3 | 162 | dispatch_debug("%s instruction fails too often", what); |
35b1eba8 MW |
163 | return (0); |
164 | } | |
165 | ||
08e2be29 MW |
166 | #endif |
167 | ||
a02a22d4 MW |
168 | /*----- General feature probing using auxiliary vectors -------------------*/ |
169 | ||
170 | /* Try to find the system's definitions for auxiliary vector entries. */ | |
171 | #ifdef HAVE_SYS_AUXV_H | |
172 | # include <sys/auxv.h> | |
a0e9bb8a MW |
173 | #endif |
174 | #ifdef HAVE_LINUX_AUXVEC_H | |
175 | # include <linux/auxvec.h> | |
176 | #endif | |
177 | #ifdef HAVE_ASM_HWCAP_H | |
178 | # include <asm/hwcap.h> | |
a02a22d4 MW |
179 | #endif |
180 | ||
181 | /* The type of entries in the auxiliary vector. I'm assuming that `unsigned | |
182 | * long' matches each platform's word length; if this is false then we'll | |
183 | * need some host-specific tweaking here. | |
184 | */ | |
185 | union auxval { long i; unsigned long u; const void *p; }; | |
186 | struct auxentry { unsigned long type; union auxval value; }; | |
187 | ||
188 | /* Register each CPU family's interest in the auxiliary vector. Make sure | |
189 | * that the necessary entry types are defined. This is primarily ordered by | |
190 | * entry type to minimize duplication. | |
191 | */ | |
61bd904b MW |
192 | #if defined(AT_HWCAP) && CPUFAM_ARMEL |
193 | # define WANT_ANY 1 | |
194 | # define WANT_AT_HWCAP(_) _(AT_HWCAP, u, hwcap) | |
195 | #endif | |
a02a22d4 | 196 | |
e492db88 MW |
197 | #if defined(AT_HWCAP) && CPUFAM_ARM64 |
198 | # define WANT_ANY 1 | |
199 | # define WANT_AT_HWCAP(_) _(AT_HWCAP, u, hwcap) | |
200 | #endif | |
201 | ||
26e182fc MW |
202 | #if defined(AT_HWCAP2) && CPUFAM_ARMEL |
203 | # define WANT_ANY 1 | |
204 | # define WANT_AT_HWCAP2(_) _(AT_HWCAP2, u, hwcap2) | |
205 | #endif | |
206 | ||
a02a22d4 MW |
207 | /* If we couldn't find any interesting entries then we can switch all of this |
208 | * machinery off. Also do that if we have no means for atomic updates. | |
209 | */ | |
210 | #if WANT_ANY && CPU_DISPATCH_P | |
211 | ||
212 | /* The main output of this section is a bitmask of detected features. The | |
213 | * least significant bit will be set if we've tried to probe. Always access | |
214 | * this using `DISPATCH_LOAD' and `DISPATCH_STORE'. | |
215 | */ | |
216 | static unsigned hwcaps = 0; | |
217 | ||
218 | /* For each potentially interesting type which turned out not to exist or be | |
219 | * wanted, define a dummy macro for the sake of the next step. | |
220 | */ | |
221 | #ifndef WANT_AT_HWCAP | |
222 | # define WANT_AT_HWCAP(_) | |
223 | #endif | |
f013a4f2 MW |
224 | #ifndef WANT_AT_HWCAP2 |
225 | # define WANT_AT_HWCAP2(_) | |
226 | #endif | |
a02a22d4 MW |
227 | |
228 | /* For each CPU family, define two lists. | |
229 | * | |
230 | * * `WANTAUX' is a list of the `WANT_AT_MUMBLE' macros which the CPU | |
231 | * family tried to register interest in above. Each entry contains the | |
232 | * interesting auxiliary vector entry type, the name of the union branch | |
233 | * for its value, and the name of the slot in `struct auxprobe' in which | |
234 | * to store the value. | |
235 | * | |
236 | * * `CAPMAP' is a list describing the output features which the CPU family | |
237 | * intends to satisfy from the auxiliary vector. Each entry contains a | |
238 | * feature name suffix, and the token name (for `check_env'). | |
239 | */ | |
61bd904b MW |
240 | #if CPUFAM_ARMEL |
241 | # define WANTAUX(_) \ | |
26e182fc MW |
242 | WANT_AT_HWCAP(_) \ |
243 | WANT_AT_HWCAP2(_) | |
61bd904b MW |
244 | # define CAPMAP(_) \ |
245 | _(ARM_VFP, "arm:vfp") \ | |
246 | _(ARM_NEON, "arm:neon") \ | |
247 | _(ARM_V4, "arm:v4") \ | |
26e182fc | 248 | _(ARM_D32, "arm:d32") \ |
9e6a4409 MW |
249 | _(ARM_AES, "arm:aes") \ |
250 | _(ARM_PMULL, "arm:pmull") | |
61bd904b | 251 | #endif |
e492db88 MW |
252 | #if CPUFAM_ARM64 |
253 | # define WANTAUX(_) \ | |
254 | WANT_AT_HWCAP(_) | |
255 | # define CAPMAP(_) \ | |
cb7f92c4 | 256 | _(ARM_NEON, "arm:neon") \ |
9e6a4409 MW |
257 | _(ARM_AES, "arm:aes") \ |
258 | _(ARM_PMULL, "arm:pmull") | |
e492db88 | 259 | #endif |
a02a22d4 MW |
260 | |
261 | /* Build the bitmask for `hwcaps' from the `CAPMAP' list. */ | |
262 | enum { | |
263 | HFI_PROBED = 0, | |
264 | #define HFI__ENUM(feat, tok) HFI_##feat, | |
265 | CAPMAP(HFI__ENUM) | |
266 | #undef HFI__ENUM | |
267 | HFI__END | |
268 | }; | |
269 | enum { | |
270 | HF_PROBED = 1, | |
271 | #define HF__FLAG(feat, tok) HF_##feat = 1 << HFI_##feat, | |
272 | CAPMAP(HF__FLAG) | |
273 | #undef HF__FLAG | |
274 | HF__END | |
275 | }; | |
276 | ||
277 | /* Build a structure in which we can capture the interesting data from the | |
278 | * auxiliary vector. | |
279 | */ | |
280 | #define AUXUTYPE_i long | |
281 | #define AUXUTYPE_u unsigned long | |
282 | #define AUXUTYPE_p const void * | |
283 | struct auxprobe { | |
284 | #define AUXPROBE__SLOT(type, ubranch, slot) AUXUTYPE_##ubranch slot; | |
285 | WANTAUX(AUXPROBE__SLOT) | |
286 | #undef AUXPROBE_SLOT | |
287 | }; | |
288 | ||
289 | /* --- @probe_hwcaps@ --- * | |
290 | * | |
291 | * Arguments: --- | |
292 | * | |
293 | * Returns: --- | |
294 | * | |
295 | * Use: Attempt to find the auxiliary vector (which is well hidden) | |
296 | * and discover interesting features from it. | |
297 | */ | |
298 | ||
299 | static void probe_hwcaps(void) | |
300 | { | |
301 | unsigned hw = HF_PROBED; | |
302 | struct auxprobe probed = { 0 }; | |
303 | ||
304 | /* Populate `probed' with the information we manage to retrieve from the | |
305 | * auxiliary vector. Slots we couldn't find are left zero-valued. | |
306 | */ | |
307 | #if defined(HAVE_GETAUXVAL) | |
308 | /* Shiny new libc lets us request individual entry types. This is almost | |
309 | * too easy. | |
310 | */ | |
84850eec MW |
311 | # define CAP__GET(type, ubranch, slot) \ |
312 | probed.slot = (AUXUTYPE_##ubranch)getauxval(type); | |
a02a22d4 MW |
313 | WANTAUX(CAP__GET) |
314 | #else | |
315 | /* Otherwise we're a bit stuck, really. Modern Linux kernels make a copy | |
316 | * of the vector available in `/procc' so we could try that. | |
317 | * | |
318 | * The usual place is stuck on the end of the environment vector, but that | |
319 | * may well have moved, and we have no way of telling whether it has or | |
320 | * whether there was ever an auxiliary vector there at all; so don't do | |
321 | * that. | |
322 | */ | |
323 | { | |
324 | FILE *fp = 0; | |
325 | unsigned char *p = 0, *q = 0; | |
326 | const struct auxentry *a; | |
327 | size_t sz, off, n; | |
328 | ||
329 | /* Open the file and read it into a memory chunk. */ | |
330 | if ((fp = fopen("/proc/self/auxv", "rb")) == 0) goto clean; | |
331 | sz = 4096; off = 0; | |
332 | if ((p = malloc(sz)) == 0) goto clean; | |
333 | for (;;) { | |
334 | n = fread(p + off, 1, sz - off, fp); | |
335 | off += n; | |
336 | if (off < sz) break; | |
337 | sz *= 2; if ((q = realloc(p, sz)) == 0) break; | |
338 | p = q; | |
339 | } | |
340 | ||
341 | /* Work through the vector (or as much of it as we found) and extract the | |
342 | * types we're interested in. | |
343 | */ | |
344 | for (a = (const struct auxentry *)p, | |
345 | n = sz/sizeof(struct auxentry); | |
346 | n--; a++) { | |
347 | switch (a->type) { | |
348 | #define CAP__SWITCH(type, ubranch, slot) \ | |
349 | case type: probed.slot = a->value.ubranch; break; | |
350 | WANTAUX(CAP__SWITCH) | |
dfcb2a0b | 351 | case AT_NULL: goto clean; |
a02a22d4 MW |
352 | } |
353 | } | |
354 | ||
355 | clean: | |
356 | if (p) free(p); | |
357 | if (fp) fclose(fp); | |
358 | } | |
359 | #endif | |
360 | ||
361 | /* Each CPU family now has to pick through what was found and stashed in | |
362 | * `probed', and set the appropriate flag bits in `hw'. | |
363 | */ | |
61bd904b MW |
364 | #if CPUFAM_ARMEL |
365 | if (probed.hwcap & HWCAP_VFPv3) hw |= HF_ARM_VFP; | |
366 | if (probed.hwcap & HWCAP_NEON) hw |= HF_ARM_NEON; | |
367 | if (probed.hwcap & HWCAP_VFPD32) hw |= HF_ARM_D32; | |
368 | if (probed.hwcap & HWCAP_VFPv4) hw |= HF_ARM_V4; | |
26e182fc MW |
369 | # ifdef HWCAP2_AES |
370 | if (probed.hwcap2 & HWCAP2_AES) hw |= HF_ARM_AES; | |
371 | # endif | |
9e6a4409 MW |
372 | # ifdef HWCAP2_PMULL |
373 | if (probed.hwcap2 & HWCAP2_PMULL) hw |= HF_ARM_PMULL; | |
374 | # endif | |
61bd904b | 375 | #endif |
e492db88 | 376 | #if CPUFAM_ARM64 |
cb7f92c4 | 377 | if (probed.hwcap & HWCAP_ASIMD) hw |= HF_ARM_NEON; |
e492db88 | 378 | if (probed.hwcap & HWCAP_AES) hw |= HF_ARM_AES; |
9e6a4409 | 379 | if (probed.hwcap & HWCAP_PMULL) hw |= HF_ARM_PMULL; |
e492db88 | 380 | #endif |
a02a22d4 MW |
381 | |
382 | /* Store the bitmask of features we probed for everyone to see. */ | |
383 | DISPATCH_STORE(hwcaps, hw); | |
384 | ||
385 | /* Finally, make a report about the things we found. (Doing this earlier | |
386 | * will pointlessly widen the window in which multiple threads will do the | |
387 | * above auxiliary-vector probing.) | |
388 | */ | |
389 | #define CAP__DEBUG(feat, tok) \ | |
390 | dispatch_debug("check auxv for feature `%s': %s", tok, \ | |
391 | hw & HF_##feat ? "available" : "absent"); | |
392 | CAPMAP(CAP__DEBUG) | |
393 | #undef CAP__DEBUG | |
394 | } | |
395 | ||
396 | /* --- @get_hwcaps@ --- * | |
397 | * | |
398 | * Arguments: --- | |
399 | * | |
400 | * Returns: A mask of hardware capabilities and other features, as probed | |
401 | * from the auxiliary vector. | |
402 | */ | |
403 | ||
404 | static unsigned get_hwcaps(void) | |
405 | { | |
406 | unsigned hw; | |
407 | ||
408 | DISPATCH_LOAD(hwcaps, hw); | |
409 | if (!(hwcaps & HF_PROBED)) { probe_hwcaps(); DISPATCH_LOAD(hwcaps, hw); } | |
410 | return (hw); | |
411 | } | |
412 | ||
413 | #endif | |
414 | ||
d26ad211 MW |
415 | /*----- External interface ------------------------------------------------*/ |
416 | ||
fac645f7 MW |
417 | /* --- @dispatch_debug@ --- * |
418 | * | |
419 | * Arguments: @const char *fmt@ = a format string | |
420 | * @...@ = additional arguments | |
421 | * | |
422 | * Returns: --- | |
423 | * | |
424 | * Use: Writes a formatted message to standard output if dispatch | |
425 | * debugging is enabled. | |
426 | */ | |
427 | ||
428 | void dispatch_debug(const char *fmt, ...) | |
429 | { | |
430 | va_list ap; | |
431 | const char *e = getenv("CATACOMB_CPUDISPATCH_DEBUG"); | |
432 | ||
433 | if (e && *e != 'n' && *e != '0') { | |
434 | va_start(ap, fmt); | |
435 | fputs("Catacomb CPUDISPATCH: ", stderr); | |
436 | vfprintf(stderr, fmt, ap); | |
437 | fputc('\n', stderr); | |
438 | va_end(ap); | |
439 | } | |
440 | } | |
441 | ||
08e2be29 MW |
442 | /* --- @check_env@ --- * |
443 | * | |
444 | * Arguments: @const char *ftok@ = feature token | |
445 | * | |
446 | * Returns: Zero if the feature is forced off; positive if it's forced | |
447 | * on; negative if the user hasn't decided. | |
448 | * | |
449 | * Use: Checks the environment variable `CATACOMB_CPUFEAT' for the | |
450 | * feature token @ftok@. The variable, if it exists, should be | |
451 | * a space-separated sequence of `+tok' and `-tok' items. These | |
452 | * tokens may end in `*', which matches any suffix. | |
453 | */ | |
454 | ||
455 | static int IGNORABLE check_env(const char *ftok) | |
456 | { | |
457 | const char *p, *q, *pp; | |
458 | int d; | |
459 | ||
460 | p = getenv("CATACOMB_CPUFEAT"); | |
461 | if (!p) return (-1); | |
462 | ||
463 | for (;;) { | |
141c1284 | 464 | while (ISSPACE(*p)) p++; |
08e2be29 MW |
465 | if (!*p) return (-1); |
466 | switch (*p) { | |
467 | case '+': d = +1; p++; break; | |
468 | case '-': d = 0; p++; break; | |
469 | default: d = -1; break; | |
470 | } | |
141c1284 | 471 | for (q = p; *q && !ISSPACE(*q); q++); |
08e2be29 MW |
472 | if (d >= 0) { |
473 | for (pp = ftok; p < q && *pp && *p == *pp; p++, pp++); | |
474 | if ((p == q && !*pp) || (*p == '*' && p + 1 == q)) return (d); | |
475 | } | |
476 | p = q; | |
477 | } | |
478 | return (-1); | |
479 | } | |
480 | ||
481 | /* --- @cpu_feature_p@ --- * | |
482 | * | |
483 | * Arguments: @unsigned feat@ = a @CPUFEAT_...@ code | |
484 | * | |
485 | * Returns: Nonzero if the feature is available. | |
486 | */ | |
487 | ||
488 | #include <stdio.h> | |
489 | ||
fac645f7 MW |
490 | static int IGNORABLE |
491 | feat_debug(const char *ftok, const char *check, int verdict) | |
492 | { | |
493 | if (verdict >= 0) { | |
494 | dispatch_debug("feature `%s': %s -> %s", ftok, check, | |
495 | verdict ? "available" : "absent"); | |
496 | } | |
497 | return (verdict); | |
498 | } | |
499 | ||
08e2be29 MW |
500 | int cpu_feature_p(int feat) |
501 | { | |
502 | int IGNORABLE f; | |
503 | IGNORE(f); | |
fac645f7 | 504 | #define CASE_CPUFEAT(feat, ftok, cond) case CPUFEAT_##feat: \ |
bb52c31d | 505 | if ((f = feat_debug(ftok, "environment override", check_env(ftok))) >= 0) \ |
fac645f7 MW |
506 | return (f); \ |
507 | else \ | |
508 | return (feat_debug(ftok, "runtime probe", cond)); | |
08e2be29 MW |
509 | |
510 | switch (feat) { | |
0f23f75f | 511 | #if CPUFAM_X86 || CPUFAM_AMD64 |
fac645f7 | 512 | CASE_CPUFEAT(X86_SSE2, "x86:sse2", |
0ed9f882 | 513 | cpuid_feature_p(CPUID_1_D, CPUID1D_SSE2) && |
4fab22c2 | 514 | xmm_registers_available_p()); |
fac645f7 | 515 | CASE_CPUFEAT(X86_AESNI, "x86:aesni", |
0ed9f882 | 516 | cpuid_feature_p(CPUID_1_D, CPUID1C_AESNI) && |
4fab22c2 | 517 | xmm_registers_available_p()); |
d25653be | 518 | CASE_CPUFEAT(X86_RDRAND, "x86:rdrand", |
0ed9f882 | 519 | cpuid_feature_p(CPUID_1_C, CPUID1C_RDRAND) && |
1b07c4f3 | 520 | rdrand_works_p(OP_RDRAND)); |
b9b279b4 | 521 | CASE_CPUFEAT(X86_AVX, "x86:avx", |
0ed9f882 | 522 | cpuid_feature_p(CPUID_1_C, CPUID1C_AVX) && |
6af2607b | 523 | xmm_registers_available_p()); |
9e6a4409 | 524 | CASE_CPUFEAT(X86_SSSE3, "x86:ssse3", |
0ed9f882 | 525 | cpuid_feature_p(CPUID_1_C, CPUID1C_SSSE3) && |
6af2607b | 526 | xmm_registers_available_p()); |
9e6a4409 | 527 | CASE_CPUFEAT(X86_PCLMUL, "x86:pclmul", |
0ed9f882 | 528 | cpuid_feature_p(CPUID_1_C, CPUID1C_PCLMUL) && |
6af2607b | 529 | xmm_registers_available_p()); |
08e2be29 | 530 | #endif |
a02a22d4 MW |
531 | #ifdef CAPMAP |
532 | # define FEATP__CASE(feat, tok) \ | |
0aec0658 | 533 | CASE_CPUFEAT(feat, tok, get_hwcaps() & HF_##feat) |
a02a22d4 MW |
534 | CAPMAP(FEATP__CASE) |
535 | #undef FEATP__CASE | |
536 | #endif | |
08e2be29 | 537 | default: |
fac645f7 | 538 | dispatch_debug("denying unknown feature %d", feat); |
08e2be29 MW |
539 | return (0); |
540 | } | |
fac645f7 | 541 | #undef CASE_CPUFEAT |
08e2be29 MW |
542 | } |
543 | ||
544 | /*----- That's all, folks -------------------------------------------------*/ |