1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
|
# detect-intrinsics.cmake -- Detect compiler intrinsics support
# Licensed under the Zlib license, see LICENSE.md for details
macro(check_acle_compiler_flag)
if(NOT NATIVEFLAG)
if(CMAKE_C_COMPILER_ID MATCHES "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang")
check_c_compiler_flag("-march=armv8-a+crc" HAVE_MARCH_ARMV8_CRC)
if(HAVE_MARCH_ARMV8_CRC)
set(ACLEFLAG "-march=armv8-a+crc" CACHE INTERNAL "Compiler option to enable ACLE support")
else()
check_c_compiler_flag("-march=armv8-a+crc+simd" HAVE_MARCH_ARMV8_CRC_SIMD)
if(HAVE_MARCH_ARMV8_CRC_SIMD)
set(ACLEFLAG "-march=armv8-a+crc+simd" CACHE INTERNAL "Compiler option to enable ACLE support")
endif()
endif()
endif()
endif()
# Check whether compiler supports ARMv8 CRC intrinsics
set(CMAKE_REQUIRED_FLAGS "${ACLEFLAG} ${NATIVEFLAG} ${ZNOLTOFLAG}")
check_c_source_compiles(
"#if defined(_MSC_VER)
#include <intrin.h>
#else
#include <arm_acle.h>
#endif
unsigned int f(unsigned int a, unsigned int b) {
return __crc32w(a, b);
}
int main(void) { return 0; }"
HAVE_ACLE_FLAG
)
set(CMAKE_REQUIRED_FLAGS)
endmacro()
macro(check_armv6_compiler_flag)
if(NOT NATIVEFLAG)
if(CMAKE_C_COMPILER_ID MATCHES "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang")
check_c_compiler_flag("-march=armv6" HAVE_MARCH_ARMV6)
if(HAVE_MARCH_ARMV6)
set(ARMV6FLAG "-march=armv6" CACHE INTERNAL "Compiler option to enable ARMv6 support")
endif()
endif()
endif()
# Check whether compiler supports ARMv6 inline asm
set(CMAKE_REQUIRED_FLAGS "${ARMV6FLAG} ${NATIVEFLAG} ${ZNOLTOFLAG}")
check_c_source_compiles(
"unsigned int f(unsigned int a, unsigned int b) {
unsigned int c;
__asm__ __volatile__ ( \"uqsub16 %0, %1, %2\" : \"=r\" (c) : \"r\" (a), \"r\" (b) );
return (int)c;
}
int main(void) { return f(1,2); }"
HAVE_ARMV6_INLINE_ASM
)
# Check whether compiler supports ARMv6 intrinsics
check_c_source_compiles(
"#if defined(_MSC_VER)
#include <intrin.h>
#else
#include <arm_acle.h>
#endif
unsigned int f(unsigned int a, unsigned int b) {
#if defined(_MSC_VER)
return _arm_uqsub16(a, b);
#else
return __uqsub16(a, b);
#endif
}
int main(void) { return f(1,2); }"
HAVE_ARMV6_INTRIN
)
set(CMAKE_REQUIRED_FLAGS)
endmacro()
macro(check_avx512_intrinsics)
if(NOT NATIVEFLAG)
if(CMAKE_C_COMPILER_ID MATCHES "Intel")
if(CMAKE_HOST_UNIX OR APPLE)
set(AVX512FLAG "-mavx512f -mavx512dq -mavx512bw -mavx512vl -mbmi2")
else()
set(AVX512FLAG "/arch:AVX512")
endif()
elseif(CMAKE_C_COMPILER_ID MATCHES "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang")
# For CPUs that can benefit from AVX512, it seems GCC generates suboptimal
# instruction scheduling unless you specify a reasonable -mtune= target
set(AVX512FLAG "-mavx512f -mavx512dq -mavx512bw -mavx512vl -mbmi2")
if(NOT MSVC)
check_c_compiler_flag("-mtune=cascadelake" HAVE_CASCADE_LAKE)
if(HAVE_CASCADE_LAKE)
set(AVX512FLAG "${AVX512FLAG} -mtune=cascadelake")
else()
set(AVX512FLAG "${AVX512FLAG} -mtune=skylake-avx512")
endif()
unset(HAVE_CASCADE_LAKE)
endif()
elseif(MSVC)
set(AVX512FLAG "/arch:AVX512")
endif()
endif()
# Check whether compiler supports AVX512 intrinsics
set(CMAKE_REQUIRED_FLAGS "${AVX512FLAG} ${NATIVEFLAG} ${ZNOLTOFLAG}")
check_c_source_compiles(
"#include <immintrin.h>
__m512i f(__m512i y) {
__m512i x = _mm512_set1_epi8(2);
return _mm512_sub_epi8(x, y);
}
int main(void) { return 0; }"
HAVE_AVX512_INTRIN
)
endmacro()
macro(check_avx512vnni_intrinsics)
if(NOT NATIVEFLAG)
if(CMAKE_C_COMPILER_ID MATCHES "Intel")
if(CMAKE_HOST_UNIX OR APPLE OR CMAKE_C_COMPILER_ID MATCHES "IntelLLVM")
set(AVX512VNNIFLAG "-mavx512f -mavx512dq -mavx512bw -mavx512vl -mavx512vnni -mbmi2")
else()
set(AVX512VNNIFLAG "/arch:AVX512")
endif()
elseif(CMAKE_C_COMPILER_ID MATCHES "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang")
set(AVX512VNNIFLAG "-mavx512f -mavx512dq -mavx512bw -mavx512vl -mavx512vnni -mbmi2")
if(NOT MSVC)
check_c_compiler_flag("-mtune=cascadelake" HAVE_CASCADE_LAKE)
if(HAVE_CASCADE_LAKE)
set(AVX512VNNIFLAG "${AVX512VNNIFLAG} -mtune=cascadelake")
else()
set(AVX512VNNIFLAG "${AVX512VNNIFLAG} -mtune=skylake-avx512")
endif()
unset(HAVE_CASCADE_LAKE)
endif()
elseif(MSVC)
set(AVX512VNNIFLAG "/arch:AVX512")
endif()
endif()
# Check whether compiler supports AVX512vnni intrinsics
set(CMAKE_REQUIRED_FLAGS "${AVX512VNNIFLAG} ${NATIVEFLAG} ${ZNOLTOFLAG}")
check_c_source_compiles(
"#include <immintrin.h>
__m512i f(__m512i x, __m512i y) {
__m512i z = _mm512_setzero_epi32();
return _mm512_dpbusd_epi32(z, x, y);
}
int main(void) { return 0; }"
HAVE_AVX512VNNI_INTRIN
)
set(CMAKE_REQUIRED_FLAGS)
endmacro()
macro(check_avx2_intrinsics)
if(NOT NATIVEFLAG)
if(CMAKE_C_COMPILER_ID MATCHES "Intel")
if(CMAKE_HOST_UNIX OR APPLE)
set(AVX2FLAG "-mavx2 -mbmi2")
else()
set(AVX2FLAG "/arch:AVX2")
endif()
elseif(CMAKE_C_COMPILER_ID MATCHES "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang")
set(AVX2FLAG "-mavx2 -mbmi2")
elseif(MSVC)
set(AVX2FLAG "/arch:AVX2")
endif()
endif()
# Check whether compiler supports AVX2 intrinics
set(CMAKE_REQUIRED_FLAGS "${AVX2FLAG} ${NATIVEFLAG} ${ZNOLTOFLAG}")
check_c_source_compiles(
"#include <immintrin.h>
__m256i f(__m256i x) {
const __m256i y = _mm256_set1_epi16(1);
return _mm256_subs_epu16(x, y);
}
int main(void) { return 0; }"
HAVE_AVX2_INTRIN
)
set(CMAKE_REQUIRED_FLAGS)
endmacro()
macro(check_neon_compiler_flag)
if(NOT NATIVEFLAG)
if(CMAKE_C_COMPILER_ID MATCHES "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang")
if("${ARCH}" MATCHES "aarch64")
set(NEONFLAG "-march=armv8-a+simd")
else()
set(NEONFLAG "-mfpu=neon")
endif()
endif()
endif()
# Check whether compiler supports NEON flag
set(CMAKE_REQUIRED_FLAGS "${NEONFLAG} ${NATIVEFLAG} ${ZNOLTOFLAG}")
check_c_source_compiles(
"#if defined(_M_ARM64) || defined(_M_ARM64EC)
# include <arm64_neon.h>
#else
# include <arm_neon.h>
#endif
int main() { return 0; }"
NEON_AVAILABLE FAIL_REGEX "not supported")
# Check whether compiler native flag is enough for NEON support
# Some GCC versions don't enable FPU (vector unit) when using -march=native
if(NEON_AVAILABLE AND NATIVEFLAG AND (NOT "${ARCH}" MATCHES "aarch64"))
check_c_source_compiles(
"#include <arm_neon.h>
uint8x16_t f(uint8x16_t x, uint8x16_t y) {
return vaddq_u8(x, y);
}
int main(int argc, char* argv[]) {
uint8x16_t a = vdupq_n_u8(argc);
uint8x16_t b = vdupq_n_u8(argc);
uint8x16_t result = f(a, b);
return result[0];
}"
ARM_NEON_SUPPORT_NATIVE
)
if(NOT ARM_NEON_SUPPORT_NATIVE)
set(CMAKE_REQUIRED_FLAGS "${NATIVEFLAG} -mfpu=neon ${ZNOLTOFLAG}")
check_c_source_compiles(
"#include <arm_neon.h>
uint8x16_t f(uint8x16_t x, uint8x16_t y) {
return vaddq_u8(x, y);
}
int main(int argc, char* argv[]) {
uint8x16_t a = vdupq_n_u8(argc);
uint8x16_t b = vdupq_n_u8(argc);
uint8x16_t result = f(a, b);
return result[0];
}"
ARM_NEON_SUPPORT_NATIVE_MFPU
)
if(ARM_NEON_SUPPORT_NATIVE_MFPU)
set(NEONFLAG "-mfpu=neon")
else()
# Remove local NEON_AVAILABLE variable and overwrite the cache
unset(NEON_AVAILABLE)
set(NEON_AVAILABLE "" CACHE INTERNAL "NEON support available" FORCE)
endif()
endif()
endif()
set(CMAKE_REQUIRED_FLAGS)
endmacro()
macro(check_neon_ld4_intrinsics)
if(NOT NATIVEFLAG)
if(CMAKE_C_COMPILER_ID MATCHES "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang")
if("${ARCH}" MATCHES "aarch64")
set(NEONFLAG "-march=armv8-a+simd")
else()
set(NEONFLAG "-mfpu=neon")
endif()
endif()
endif()
# Check whether compiler supports loading 4 neon vecs into a register range
set(CMAKE_REQUIRED_FLAGS "${NEONFLAG} ${NATIVEFLAG} ${ZNOLTOFLAG}")
check_c_source_compiles(
"#if defined(_MSC_VER) && (defined(_M_ARM64) || defined(_M_ARM64EC))
# include <arm64_neon.h>
#else
# include <arm_neon.h>
#endif
int32x4x4_t f(int var[16]) { return vld1q_s32_x4(var); }
int main(void) { return 0; }"
NEON_HAS_LD4)
set(CMAKE_REQUIRED_FLAGS)
endmacro()
macro(check_pclmulqdq_intrinsics)
if(NOT NATIVEFLAG)
if(CMAKE_C_COMPILER_ID MATCHES "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang" OR CMAKE_C_COMPILER_ID MATCHES "IntelLLVM")
set(PCLMULFLAG "-mpclmul")
endif()
endif()
# Check whether compiler supports PCLMULQDQ intrinsics
if(NOT (APPLE AND "${ARCH}" MATCHES "i386"))
# The pclmul code currently crashes on Mac in 32bit mode. Avoid for now.
set(CMAKE_REQUIRED_FLAGS "${PCLMULFLAG} ${NATIVEFLAG} ${ZNOLTOFLAG}")
check_c_source_compiles(
"#include <immintrin.h>
#include <wmmintrin.h>
__m128i f(__m128i a, __m128i b) { return _mm_clmulepi64_si128(a, b, 0x10); }
int main(void) { return 0; }"
HAVE_PCLMULQDQ_INTRIN
)
set(CMAKE_REQUIRED_FLAGS)
else()
set(HAVE_PCLMULQDQ_INTRIN OFF)
endif()
endmacro()
macro(check_vpclmulqdq_intrinsics)
if(NOT NATIVEFLAG)
if(CMAKE_C_COMPILER_ID MATCHES "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang" OR CMAKE_C_COMPILER_ID MATCHES "IntelLLVM")
set(VPCLMULFLAG "-mvpclmulqdq -mavx512f")
endif()
endif()
# Check whether compiler supports VPCLMULQDQ intrinsics
if(NOT (APPLE AND "${ARCH}" MATCHES "i386"))
set(CMAKE_REQUIRED_FLAGS "${VPCLMULFLAG} ${NATIVEFLAG} ${ZNOLTOFLAG}")
check_c_source_compiles(
"#include <immintrin.h>
#include <wmmintrin.h>
__m512i f(__m512i a) {
__m512i b = _mm512_setzero_si512();
return _mm512_clmulepi64_epi128(a, b, 0x10);
}
int main(void) { return 0; }"
HAVE_VPCLMULQDQ_INTRIN
)
set(CMAKE_REQUIRED_FLAGS)
else()
set(HAVE_VPCLMULQDQ_INTRIN OFF)
endif()
endmacro()
macro(check_ppc_intrinsics)
# Check if compiler supports AltiVec
set(CMAKE_REQUIRED_FLAGS "-maltivec ${ZNOLTOFLAG}")
check_c_source_compiles(
"#include <altivec.h>
int main(void)
{
vector int a = vec_splats(0);
vector int b = vec_splats(0);
a = vec_add(a, b);
return 0;
}"
HAVE_ALTIVEC
)
set(CMAKE_REQUIRED_FLAGS)
if(HAVE_ALTIVEC)
set(PPCFLAGS "-maltivec")
endif()
set(CMAKE_REQUIRED_FLAGS "-maltivec -mno-vsx ${ZNOLTOFLAG}")
check_c_source_compiles(
"#include <altivec.h>
int main(void)
{
vector int a = vec_splats(0);
vector int b = vec_splats(0);
a = vec_add(a, b);
return 0;
}"
HAVE_NOVSX
)
set(CMAKE_REQUIRED_FLAGS)
if(HAVE_NOVSX)
set(PPCFLAGS "${PPCFLAGS} -mno-vsx")
endif()
# Check if we have what we need for AltiVec optimizations
set(CMAKE_REQUIRED_FLAGS "${PPCFLAGS} ${NATIVEFLAG} ${ZNOLTOFLAG}")
check_c_source_compiles(
"#include <sys/auxv.h>
#ifdef __FreeBSD__
#include <machine/cpu.h>
#endif
int main() {
#ifdef __FreeBSD__
unsigned long hwcap;
elf_aux_info(AT_HWCAP, &hwcap, sizeof(hwcap));
return (hwcap & PPC_FEATURE_HAS_ALTIVEC);
#else
return (getauxval(AT_HWCAP) & PPC_FEATURE_HAS_ALTIVEC);
#endif
}"
HAVE_VMX
)
set(CMAKE_REQUIRED_FLAGS)
endmacro()
macro(check_power8_intrinsics)
if(NOT NATIVEFLAG)
if(CMAKE_C_COMPILER_ID MATCHES "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang")
set(POWER8FLAG "-mcpu=power8")
endif()
endif()
# Check if we have what we need for POWER8 optimizations
set(CMAKE_REQUIRED_FLAGS "${POWER8FLAG} ${NATIVEFLAG} ${ZNOLTOFLAG}")
check_c_source_compiles(
"#include <sys/auxv.h>
#ifdef __FreeBSD__
#include <machine/cpu.h>
#endif
int main() {
#ifdef __FreeBSD__
unsigned long hwcap;
elf_aux_info(AT_HWCAP2, &hwcap, sizeof(hwcap));
return (hwcap & PPC_FEATURE2_ARCH_2_07);
#else
return (getauxval(AT_HWCAP2) & PPC_FEATURE2_ARCH_2_07);
#endif
}"
HAVE_POWER8_INTRIN
)
if(NOT HAVE_POWER8_INTRIN AND HAVE_LINUX_AUXVEC_H)
check_c_source_compiles(
"#include <sys/auxv.h>
#include <linux/auxvec.h>
int main() {
return (getauxval(AT_HWCAP2) & PPC_FEATURE2_ARCH_2_07);
}"
HAVE_POWER8_INTRIN2
)
if(HAVE_POWER8_INTRIN2)
set(POWER8_NEED_AUXVEC_H 1)
set(HAVE_POWER8_INTRIN ${HAVE_POWER8_INTRIN2} CACHE INTERNAL "Have POWER8 intrinsics" FORCE)
unset(HAVE_POWER8_INTRIN2 CACHE)
endif()
endif()
set(CMAKE_REQUIRED_FLAGS)
endmacro()
macro(check_rvv_intrinsics)
if(NOT NATIVEFLAG)
if(CMAKE_C_COMPILER_ID MATCHES "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang")
set(RISCVFLAG "-march=rv64gcv")
endif()
endif()
# Check whether compiler supports RVV
set(CMAKE_REQUIRED_FLAGS "${RISCVFLAG} ${NATIVEFLAG} ${ZNOLTOFLAG}")
check_c_source_compiles(
"#include <riscv_vector.h>
int main() {
return 0;
}"
HAVE_RVV_INTRIN
)
set(CMAKE_REQUIRED_FLAGS)
endmacro()
macro(check_s390_intrinsics)
check_c_source_compiles(
"#include <sys/auxv.h>
#ifndef HWCAP_S390_VXRS
#define HWCAP_S390_VXRS (1 << 11)
#endif
int main() {
return (getauxval(AT_HWCAP) & HWCAP_S390_VXRS);
}"
HAVE_S390_INTRIN
)
endmacro()
macro(check_power9_intrinsics)
if(NOT NATIVEFLAG)
if(CMAKE_C_COMPILER_ID MATCHES "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang")
set(POWER9FLAG "-mcpu=power9")
endif()
endif()
# Check if we have what we need for POWER9 optimizations
set(CMAKE_REQUIRED_FLAGS "${POWER9FLAG} ${NATIVEFLAG} ${ZNOLTOFLAG}")
check_c_source_compiles(
"#include <sys/auxv.h>
#ifdef __FreeBSD__
#include <machine/cpu.h>
#endif
int main() {
#ifdef __FreeBSD__
unsigned long hwcap;
elf_aux_info(AT_HWCAP2, &hwcap, sizeof(hwcap));
return (hwcap & PPC_FEATURE2_ARCH_3_00);
#else
return (getauxval(AT_HWCAP2) & PPC_FEATURE2_ARCH_3_00);
#endif
}"
HAVE_POWER9_INTRIN
)
if(NOT HAVE_POWER9_INTRIN AND HAVE_LINUX_AUXVEC_H)
check_c_source_compiles(
"#include <sys/auxv.h>
#include <linux/auxvec.h>
int main() {
return (getauxval(AT_HWCAP2) & PPC_FEATURE2_ARCH_3_00);
}"
HAVE_POWER9_INTRIN2
)
if(HAVE_POWER9_INTRIN2)
set(POWER9_NEED_AUXVEC_H 1)
set(HAVE_POWER9_INTRIN ${HAVE_POWER9_INTRIN2} CACHE INTERNAL "Have POWER9 intrinsics" FORCE)
unset(HAVE_POWER9_INTRIN2 CACHE)
endif()
endif()
set(CMAKE_REQUIRED_FLAGS)
endmacro()
macro(check_sse2_intrinsics)
if(NOT NATIVEFLAG)
if(CMAKE_C_COMPILER_ID MATCHES "Intel")
if(CMAKE_HOST_UNIX OR APPLE)
set(SSE2FLAG "-msse2")
else()
set(SSE2FLAG "/arch:SSE2")
endif()
elseif(MSVC)
if(NOT "${ARCH}" MATCHES "x86_64")
set(SSE2FLAG "/arch:SSE2")
endif()
elseif(CMAKE_C_COMPILER_ID MATCHES "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang")
set(SSE2FLAG "-msse2")
endif()
endif()
# Check whether compiler supports SSE2 intrinsics
set(CMAKE_REQUIRED_FLAGS "${SSE2FLAG} ${NATIVEFLAG} ${ZNOLTOFLAG}")
check_c_source_compiles(
"#include <immintrin.h>
__m128i f(__m128i x, __m128i y) { return _mm_sad_epu8(x, y); }
int main(void) { return 0; }"
HAVE_SSE2_INTRIN
)
set(CMAKE_REQUIRED_FLAGS)
endmacro()
macro(check_ssse3_intrinsics)
if(NOT NATIVEFLAG)
if(CMAKE_C_COMPILER_ID MATCHES "Intel")
if(CMAKE_HOST_UNIX OR APPLE)
set(SSSE3FLAG "-mssse3")
else()
set(SSSE3FLAG "/arch:SSSE3")
endif()
elseif(CMAKE_C_COMPILER_ID MATCHES "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang")
set(SSSE3FLAG "-mssse3")
endif()
endif()
# Check whether compiler supports SSSE3 intrinsics
set(CMAKE_REQUIRED_FLAGS "${SSSE3FLAG} ${NATIVEFLAG} ${ZNOLTOFLAG}")
check_c_source_compiles(
"#include <immintrin.h>
__m128i f(__m128i u) {
__m128i v = _mm_set1_epi32(1);
return _mm_hadd_epi32(u, v);
}
int main(void) { return 0; }"
HAVE_SSSE3_INTRIN
)
endmacro()
macro(check_sse42_intrinsics)
if(NOT NATIVEFLAG)
if(CMAKE_C_COMPILER_ID MATCHES "Intel")
if(CMAKE_HOST_UNIX OR APPLE)
set(SSE42FLAG "-msse4.2")
else()
set(SSE42FLAG "/arch:SSE4.2")
endif()
elseif(CMAKE_C_COMPILER_ID MATCHES "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang")
set(SSE42FLAG "-msse4.2")
endif()
endif()
# Check whether compiler supports SSE4.2 intrinsics
set(CMAKE_REQUIRED_FLAGS "${SSE42FLAG} ${NATIVEFLAG} ${ZNOLTOFLAG}")
check_c_source_compiles(
"#include <nmmintrin.h>
unsigned int f(unsigned int a, unsigned int b) { return _mm_crc32_u32(a, b); }
int main(void) { return 0; }"
HAVE_SSE42_INTRIN
)
set(CMAKE_REQUIRED_FLAGS)
endmacro()
macro(check_vgfma_intrinsics)
if(NOT NATIVEFLAG)
set(VGFMAFLAG "-march=z13")
if(CMAKE_C_COMPILER_ID MATCHES "GNU")
set(VGFMAFLAG "${VGFMAFLAG} -mzarch")
endif()
if(CMAKE_C_COMPILER_ID MATCHES "Clang")
set(VGFMAFLAG "${VGFMAFLAG} -fzvector")
endif()
endif()
# Check whether compiler supports "VECTOR GALOIS FIELD MULTIPLY SUM AND ACCUMULATE" intrinsic
set(CMAKE_REQUIRED_FLAGS "${VGFMAFLAG} ${NATIVEFLAG} ${ZNOLTOFLAG}")
check_c_source_compiles(
"#include <vecintrin.h>
int main(void) {
unsigned long long a __attribute__((vector_size(16))) = { 0 };
unsigned long long b __attribute__((vector_size(16))) = { 0 };
unsigned char c __attribute__((vector_size(16))) = { 0 };
c = vec_gfmsum_accum_128(a, b, c);
return c[0];
}"
HAVE_VGFMA_INTRIN FAIL_REGEX "not supported")
set(CMAKE_REQUIRED_FLAGS)
endmacro()
macro(check_xsave_intrinsics)
if(NOT NATIVEFLAG AND NOT MSVC AND NOT CMAKE_C_COMPILER_ID MATCHES "Intel")
set(XSAVEFLAG "-mxsave")
endif()
set(CMAKE_REQUIRED_FLAGS "${XSAVEFLAG} ${NATIVEFLAG} ${ZNOLTOFLAG}")
check_c_source_compiles(
"#ifdef _MSC_VER
# include <intrin.h>
#elif __GNUC__ == 8 && __GNUC_MINOR__ > 1
# include <xsaveintrin.h>
#else
# include <immintrin.h>
#endif
unsigned int f(unsigned int a) { return (int) _xgetbv(a); }
int main(void) { return 0; }"
HAVE_XSAVE_INTRIN FAIL_REGEX "not supported")
set(CMAKE_REQUIRED_FLAGS)
endmacro()
|
