1 /*===--- __clang_cuda_intrinsics.h - Device-side CUDA intrinsic wrappers ---===
2 *
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to deal
5 * in the Software without restriction, including without limitation the rights
6 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
7 * copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
9 *
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
18 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
19 * THE SOFTWARE.
20 *
21 *===-----------------------------------------------------------------------===
22 */
23 #ifndef __CLANG_CUDA_INTRINSICS_H__
24 #define __CLANG_CUDA_INTRINSICS_H__
25 #ifndef __CUDA__
26 #error "This file is for CUDA compilation only."
27 #endif
28
29 // sm_30 intrinsics: __shfl_{up,down,xor}.
30
31 #define __SM_30_INTRINSICS_H__
32 #define __SM_30_INTRINSICS_HPP__
33
34 #if !defined(__CUDA_ARCH__) || __CUDA_ARCH__ >= 300
35
36 #pragma push_macro("__MAKE_SHUFFLES")
37 #define __MAKE_SHUFFLES(__FnName, __IntIntrinsic, __FloatIntrinsic, __Mask, \
38 __Type) \
39 inline __device__ int __FnName(int __val, __Type __offset, \
40 int __width = warpSize) { \
41 return __IntIntrinsic(__val, __offset, \
42 ((warpSize - __width) << 8) | (__Mask)); \
43 } \
44 inline __device__ float __FnName(float __val, __Type __offset, \
45 int __width = warpSize) { \
46 return __FloatIntrinsic(__val, __offset, \
47 ((warpSize - __width) << 8) | (__Mask)); \
48 } \
49 inline __device__ unsigned int __FnName(unsigned int __val, __Type __offset, \
50 int __width = warpSize) { \
51 return static_cast<unsigned int>( \
52 ::__FnName(static_cast<int>(__val), __offset, __width)); \
53 } \
54 inline __device__ long long __FnName(long long __val, __Type __offset, \
55 int __width = warpSize) { \
56 struct __Bits { \
57 int __a, __b; \
58 }; \
59 _Static_assert(sizeof(__val) == sizeof(__Bits)); \
60 _Static_assert(sizeof(__Bits) == 2 * sizeof(int)); \
61 __Bits __tmp; \
62 memcpy(&__val, &__tmp, sizeof(__val)); \
63 __tmp.__a = ::__FnName(__tmp.__a, __offset, __width); \
64 __tmp.__b = ::__FnName(__tmp.__b, __offset, __width); \
65 long long __ret; \
66 memcpy(&__ret, &__tmp, sizeof(__tmp)); \
67 return __ret; \
68 } \
69 inline __device__ long __FnName(long __val, __Type __offset, \
70 int __width = warpSize) { \
71 _Static_assert(sizeof(long) == sizeof(long long) || \
72 sizeof(long) == sizeof(int)); \
73 if (sizeof(long) == sizeof(long long)) { \
74 return static_cast<long>( \
75 ::__FnName(static_cast<long long>(__val), __offset, __width)); \
76 } else if (sizeof(long) == sizeof(int)) { \
77 return static_cast<long>( \
78 ::__FnName(static_cast<int>(__val), __offset, __width)); \
79 } \
80 } \
81 inline __device__ unsigned long __FnName( \
82 unsigned long __val, __Type __offset, int __width = warpSize) { \
83 return static_cast<unsigned long>( \
84 ::__FnName(static_cast<long>(__val), __offset, __width)); \
85 } \
86 inline __device__ unsigned long long __FnName( \
87 unsigned long long __val, __Type __offset, int __width = warpSize) { \
88 return static_cast<unsigned long long>(::__FnName( \
89 static_cast<unsigned long long>(__val), __offset, __width)); \
90 } \
91 inline __device__ double __FnName(double __val, __Type __offset, \
92 int __width = warpSize) { \
93 long long __tmp; \
94 _Static_assert(sizeof(__tmp) == sizeof(__val)); \
95 memcpy(&__tmp, &__val, sizeof(__val)); \
96 __tmp = ::__FnName(__tmp, __offset, __width); \
97 double __ret; \
98 memcpy(&__ret, &__tmp, sizeof(__ret)); \
99 return __ret; \
100 }
101
102 __MAKE_SHUFFLES(__shfl, __nvvm_shfl_idx_i32, __nvvm_shfl_idx_f32, 0x1f, int);
103 // We use 0 rather than 31 as our mask, because shfl.up applies to lanes >=
104 // maxLane.
105 __MAKE_SHUFFLES(__shfl_up, __nvvm_shfl_up_i32, __nvvm_shfl_up_f32, 0,
106 unsigned int);
107 __MAKE_SHUFFLES(__shfl_down, __nvvm_shfl_down_i32, __nvvm_shfl_down_f32, 0x1f,
108 unsigned int);
109 __MAKE_SHUFFLES(__shfl_xor, __nvvm_shfl_bfly_i32, __nvvm_shfl_bfly_f32, 0x1f,
110 int);
111 #pragma pop_macro("__MAKE_SHUFFLES")
112
113 #endif // !defined(__CUDA_ARCH__) || __CUDA_ARCH__ >= 300
114
115 #if CUDA_VERSION >= 9000
116 #if (!defined(__CUDA_ARCH__) || __CUDA_ARCH__ >= 300)
117 // __shfl_sync_* variants available in CUDA-9
118 #pragma push_macro("__MAKE_SYNC_SHUFFLES")
119 #define __MAKE_SYNC_SHUFFLES(__FnName, __IntIntrinsic, __FloatIntrinsic, \
120 __Mask, __Type) \
121 inline __device__ int __FnName(unsigned int __mask, int __val, \
122 __Type __offset, int __width = warpSize) { \
123 return __IntIntrinsic(__mask, __val, __offset, \
124 ((warpSize - __width) << 8) | (__Mask)); \
125 } \
126 inline __device__ float __FnName(unsigned int __mask, float __val, \
127 __Type __offset, int __width = warpSize) { \
128 return __FloatIntrinsic(__mask, __val, __offset, \
129 ((warpSize - __width) << 8) | (__Mask)); \
130 } \
131 inline __device__ unsigned int __FnName(unsigned int __mask, \
132 unsigned int __val, __Type __offset, \
133 int __width = warpSize) { \
134 return static_cast<unsigned int>( \
135 ::__FnName(__mask, static_cast<int>(__val), __offset, __width)); \
136 } \
137 inline __device__ long long __FnName(unsigned int __mask, long long __val, \
138 __Type __offset, \
139 int __width = warpSize) { \
140 struct __Bits { \
141 int __a, __b; \
142 }; \
143 _Static_assert(sizeof(__val) == sizeof(__Bits)); \
144 _Static_assert(sizeof(__Bits) == 2 * sizeof(int)); \
145 __Bits __tmp; \
146 memcpy(&__val, &__tmp, sizeof(__val)); \
147 __tmp.__a = ::__FnName(__mask, __tmp.__a, __offset, __width); \
148 __tmp.__b = ::__FnName(__mask, __tmp.__b, __offset, __width); \
149 long long __ret; \
150 memcpy(&__ret, &__tmp, sizeof(__tmp)); \
151 return __ret; \
152 } \
153 inline __device__ unsigned long long __FnName( \
154 unsigned int __mask, unsigned long long __val, __Type __offset, \
155 int __width = warpSize) { \
156 return static_cast<unsigned long long>(::__FnName( \
157 __mask, static_cast<unsigned long long>(__val), __offset, __width)); \
158 } \
159 inline __device__ long __FnName(unsigned int __mask, long __val, \
160 __Type __offset, int __width = warpSize) { \
161 _Static_assert(sizeof(long) == sizeof(long long) || \
162 sizeof(long) == sizeof(int)); \
163 if (sizeof(long) == sizeof(long long)) { \
164 return static_cast<long>(::__FnName( \
165 __mask, static_cast<long long>(__val), __offset, __width)); \
166 } else if (sizeof(long) == sizeof(int)) { \
167 return static_cast<long>( \
168 ::__FnName(__mask, static_cast<int>(__val), __offset, __width)); \
169 } \
170 } \
171 inline __device__ unsigned long __FnName( \
172 unsigned int __mask, unsigned long __val, __Type __offset, \
173 int __width = warpSize) { \
174 return static_cast<unsigned long>( \
175 ::__FnName(__mask, static_cast<long>(__val), __offset, __width)); \
176 } \
177 inline __device__ double __FnName(unsigned int __mask, double __val, \
178 __Type __offset, int __width = warpSize) { \
179 long long __tmp; \
180 _Static_assert(sizeof(__tmp) == sizeof(__val)); \
181 memcpy(&__tmp, &__val, sizeof(__val)); \
182 __tmp = ::__FnName(__mask, __tmp, __offset, __width); \
183 double __ret; \
184 memcpy(&__ret, &__tmp, sizeof(__ret)); \
185 return __ret; \
186 }
187 __MAKE_SYNC_SHUFFLES(__shfl_sync, __nvvm_shfl_sync_idx_i32,
188 __nvvm_shfl_sync_idx_f32, 0x1f, int);
189 // We use 0 rather than 31 as our mask, because shfl.up applies to lanes >=
190 // maxLane.
191 __MAKE_SYNC_SHUFFLES(__shfl_up_sync, __nvvm_shfl_sync_up_i32,
192 __nvvm_shfl_sync_up_f32, 0, unsigned int);
193 __MAKE_SYNC_SHUFFLES(__shfl_down_sync, __nvvm_shfl_sync_down_i32,
194 __nvvm_shfl_sync_down_f32, 0x1f, unsigned int);
195 __MAKE_SYNC_SHUFFLES(__shfl_xor_sync, __nvvm_shfl_sync_bfly_i32,
196 __nvvm_shfl_sync_bfly_f32, 0x1f, int);
197 #pragma pop_macro("__MAKE_SYNC_SHUFFLES")
198
199 inline __device__ void __syncwarp(unsigned int mask = 0xffffffff) {
200 return __nvvm_bar_warp_sync(mask);
201 }
202
__barrier_sync(unsigned int id)203 inline __device__ void __barrier_sync(unsigned int id) {
204 __nvvm_barrier_sync(id);
205 }
206
__barrier_sync_count(unsigned int id,unsigned int count)207 inline __device__ void __barrier_sync_count(unsigned int id,
208 unsigned int count) {
209 __nvvm_barrier_sync_cnt(id, count);
210 }
211
__all_sync(unsigned int mask,int pred)212 inline __device__ int __all_sync(unsigned int mask, int pred) {
213 return __nvvm_vote_all_sync(mask, pred);
214 }
215
__any_sync(unsigned int mask,int pred)216 inline __device__ int __any_sync(unsigned int mask, int pred) {
217 return __nvvm_vote_any_sync(mask, pred);
218 }
219
__uni_sync(unsigned int mask,int pred)220 inline __device__ int __uni_sync(unsigned int mask, int pred) {
221 return __nvvm_vote_uni_sync(mask, pred);
222 }
223
__ballot_sync(unsigned int mask,int pred)224 inline __device__ unsigned int __ballot_sync(unsigned int mask, int pred) {
225 return __nvvm_vote_ballot_sync(mask, pred);
226 }
227
__activemask()228 inline __device__ unsigned int __activemask() { return __nvvm_vote_ballot(1); }
229
__fns(unsigned mask,unsigned base,int offset)230 inline __device__ unsigned int __fns(unsigned mask, unsigned base, int offset) {
231 return __nvvm_fns(mask, base, offset);
232 }
233
234 #endif // !defined(__CUDA_ARCH__) || __CUDA_ARCH__ >= 300
235
236 // Define __match* builtins CUDA-9 headers expect to see.
237 #if !defined(__CUDA_ARCH__) || __CUDA_ARCH__ >= 700
__match32_any_sync(unsigned int mask,unsigned int value)238 inline __device__ unsigned int __match32_any_sync(unsigned int mask,
239 unsigned int value) {
240 return __nvvm_match_any_sync_i32(mask, value);
241 }
242
243 inline __device__ unsigned long long
__match64_any_sync(unsigned int mask,unsigned long long value)244 __match64_any_sync(unsigned int mask, unsigned long long value) {
245 return __nvvm_match_any_sync_i64(mask, value);
246 }
247
248 inline __device__ unsigned int
__match32_all_sync(unsigned int mask,unsigned int value,int * pred)249 __match32_all_sync(unsigned int mask, unsigned int value, int *pred) {
250 return __nvvm_match_all_sync_i32p(mask, value, pred);
251 }
252
253 inline __device__ unsigned long long
__match64_all_sync(unsigned int mask,unsigned long long value,int * pred)254 __match64_all_sync(unsigned int mask, unsigned long long value, int *pred) {
255 return __nvvm_match_all_sync_i64p(mask, value, pred);
256 }
257 #include "crt/sm_70_rt.hpp"
258
259 #endif // !defined(__CUDA_ARCH__) || __CUDA_ARCH__ >= 700
260 #endif // __CUDA_VERSION >= 9000
261
262 // sm_32 intrinsics: __ldg and __funnelshift_{l,lc,r,rc}.
263
264 // Prevent the vanilla sm_32 intrinsics header from being included.
265 #define __SM_32_INTRINSICS_H__
266 #define __SM_32_INTRINSICS_HPP__
267
268 #if !defined(__CUDA_ARCH__) || __CUDA_ARCH__ >= 320
269
__ldg(const char * ptr)270 inline __device__ char __ldg(const char *ptr) { return __nvvm_ldg_c(ptr); }
__ldg(const short * ptr)271 inline __device__ short __ldg(const short *ptr) { return __nvvm_ldg_s(ptr); }
__ldg(const int * ptr)272 inline __device__ int __ldg(const int *ptr) { return __nvvm_ldg_i(ptr); }
__ldg(const long * ptr)273 inline __device__ long __ldg(const long *ptr) { return __nvvm_ldg_l(ptr); }
__ldg(const long long * ptr)274 inline __device__ long long __ldg(const long long *ptr) {
275 return __nvvm_ldg_ll(ptr);
276 }
__ldg(const unsigned char * ptr)277 inline __device__ unsigned char __ldg(const unsigned char *ptr) {
278 return __nvvm_ldg_uc(ptr);
279 }
__ldg(const signed char * ptr)280 inline __device__ signed char __ldg(const signed char *ptr) {
281 return __nvvm_ldg_uc((const unsigned char *)ptr);
282 }
__ldg(const unsigned short * ptr)283 inline __device__ unsigned short __ldg(const unsigned short *ptr) {
284 return __nvvm_ldg_us(ptr);
285 }
__ldg(const unsigned int * ptr)286 inline __device__ unsigned int __ldg(const unsigned int *ptr) {
287 return __nvvm_ldg_ui(ptr);
288 }
__ldg(const unsigned long * ptr)289 inline __device__ unsigned long __ldg(const unsigned long *ptr) {
290 return __nvvm_ldg_ul(ptr);
291 }
__ldg(const unsigned long long * ptr)292 inline __device__ unsigned long long __ldg(const unsigned long long *ptr) {
293 return __nvvm_ldg_ull(ptr);
294 }
__ldg(const float * ptr)295 inline __device__ float __ldg(const float *ptr) { return __nvvm_ldg_f(ptr); }
__ldg(const double * ptr)296 inline __device__ double __ldg(const double *ptr) { return __nvvm_ldg_d(ptr); }
297
__ldg(const char2 * ptr)298 inline __device__ char2 __ldg(const char2 *ptr) {
299 typedef char c2 __attribute__((ext_vector_type(2)));
300 // We can assume that ptr is aligned at least to char2's alignment, but the
301 // load will assume that ptr is aligned to char2's alignment. This is only
302 // safe if alignof(c2) <= alignof(char2).
303 c2 rv = __nvvm_ldg_c2(reinterpret_cast<const c2 *>(ptr));
304 char2 ret;
305 ret.x = rv[0];
306 ret.y = rv[1];
307 return ret;
308 }
__ldg(const char4 * ptr)309 inline __device__ char4 __ldg(const char4 *ptr) {
310 typedef char c4 __attribute__((ext_vector_type(4)));
311 c4 rv = __nvvm_ldg_c4(reinterpret_cast<const c4 *>(ptr));
312 char4 ret;
313 ret.x = rv[0];
314 ret.y = rv[1];
315 ret.z = rv[2];
316 ret.w = rv[3];
317 return ret;
318 }
__ldg(const short2 * ptr)319 inline __device__ short2 __ldg(const short2 *ptr) {
320 typedef short s2 __attribute__((ext_vector_type(2)));
321 s2 rv = __nvvm_ldg_s2(reinterpret_cast<const s2 *>(ptr));
322 short2 ret;
323 ret.x = rv[0];
324 ret.y = rv[1];
325 return ret;
326 }
__ldg(const short4 * ptr)327 inline __device__ short4 __ldg(const short4 *ptr) {
328 typedef short s4 __attribute__((ext_vector_type(4)));
329 s4 rv = __nvvm_ldg_s4(reinterpret_cast<const s4 *>(ptr));
330 short4 ret;
331 ret.x = rv[0];
332 ret.y = rv[1];
333 ret.z = rv[2];
334 ret.w = rv[3];
335 return ret;
336 }
__ldg(const int2 * ptr)337 inline __device__ int2 __ldg(const int2 *ptr) {
338 typedef int i2 __attribute__((ext_vector_type(2)));
339 i2 rv = __nvvm_ldg_i2(reinterpret_cast<const i2 *>(ptr));
340 int2 ret;
341 ret.x = rv[0];
342 ret.y = rv[1];
343 return ret;
344 }
__ldg(const int4 * ptr)345 inline __device__ int4 __ldg(const int4 *ptr) {
346 typedef int i4 __attribute__((ext_vector_type(4)));
347 i4 rv = __nvvm_ldg_i4(reinterpret_cast<const i4 *>(ptr));
348 int4 ret;
349 ret.x = rv[0];
350 ret.y = rv[1];
351 ret.z = rv[2];
352 ret.w = rv[3];
353 return ret;
354 }
__ldg(const longlong2 * ptr)355 inline __device__ longlong2 __ldg(const longlong2 *ptr) {
356 typedef long long ll2 __attribute__((ext_vector_type(2)));
357 ll2 rv = __nvvm_ldg_ll2(reinterpret_cast<const ll2 *>(ptr));
358 longlong2 ret;
359 ret.x = rv[0];
360 ret.y = rv[1];
361 return ret;
362 }
363
__ldg(const uchar2 * ptr)364 inline __device__ uchar2 __ldg(const uchar2 *ptr) {
365 typedef unsigned char uc2 __attribute__((ext_vector_type(2)));
366 uc2 rv = __nvvm_ldg_uc2(reinterpret_cast<const uc2 *>(ptr));
367 uchar2 ret;
368 ret.x = rv[0];
369 ret.y = rv[1];
370 return ret;
371 }
__ldg(const uchar4 * ptr)372 inline __device__ uchar4 __ldg(const uchar4 *ptr) {
373 typedef unsigned char uc4 __attribute__((ext_vector_type(4)));
374 uc4 rv = __nvvm_ldg_uc4(reinterpret_cast<const uc4 *>(ptr));
375 uchar4 ret;
376 ret.x = rv[0];
377 ret.y = rv[1];
378 ret.z = rv[2];
379 ret.w = rv[3];
380 return ret;
381 }
__ldg(const ushort2 * ptr)382 inline __device__ ushort2 __ldg(const ushort2 *ptr) {
383 typedef unsigned short us2 __attribute__((ext_vector_type(2)));
384 us2 rv = __nvvm_ldg_us2(reinterpret_cast<const us2 *>(ptr));
385 ushort2 ret;
386 ret.x = rv[0];
387 ret.y = rv[1];
388 return ret;
389 }
__ldg(const ushort4 * ptr)390 inline __device__ ushort4 __ldg(const ushort4 *ptr) {
391 typedef unsigned short us4 __attribute__((ext_vector_type(4)));
392 us4 rv = __nvvm_ldg_us4(reinterpret_cast<const us4 *>(ptr));
393 ushort4 ret;
394 ret.x = rv[0];
395 ret.y = rv[1];
396 ret.z = rv[2];
397 ret.w = rv[3];
398 return ret;
399 }
__ldg(const uint2 * ptr)400 inline __device__ uint2 __ldg(const uint2 *ptr) {
401 typedef unsigned int ui2 __attribute__((ext_vector_type(2)));
402 ui2 rv = __nvvm_ldg_ui2(reinterpret_cast<const ui2 *>(ptr));
403 uint2 ret;
404 ret.x = rv[0];
405 ret.y = rv[1];
406 return ret;
407 }
__ldg(const uint4 * ptr)408 inline __device__ uint4 __ldg(const uint4 *ptr) {
409 typedef unsigned int ui4 __attribute__((ext_vector_type(4)));
410 ui4 rv = __nvvm_ldg_ui4(reinterpret_cast<const ui4 *>(ptr));
411 uint4 ret;
412 ret.x = rv[0];
413 ret.y = rv[1];
414 ret.z = rv[2];
415 ret.w = rv[3];
416 return ret;
417 }
__ldg(const ulonglong2 * ptr)418 inline __device__ ulonglong2 __ldg(const ulonglong2 *ptr) {
419 typedef unsigned long long ull2 __attribute__((ext_vector_type(2)));
420 ull2 rv = __nvvm_ldg_ull2(reinterpret_cast<const ull2 *>(ptr));
421 ulonglong2 ret;
422 ret.x = rv[0];
423 ret.y = rv[1];
424 return ret;
425 }
426
__ldg(const float2 * ptr)427 inline __device__ float2 __ldg(const float2 *ptr) {
428 typedef float f2 __attribute__((ext_vector_type(2)));
429 f2 rv = __nvvm_ldg_f2(reinterpret_cast<const f2 *>(ptr));
430 float2 ret;
431 ret.x = rv[0];
432 ret.y = rv[1];
433 return ret;
434 }
__ldg(const float4 * ptr)435 inline __device__ float4 __ldg(const float4 *ptr) {
436 typedef float f4 __attribute__((ext_vector_type(4)));
437 f4 rv = __nvvm_ldg_f4(reinterpret_cast<const f4 *>(ptr));
438 float4 ret;
439 ret.x = rv[0];
440 ret.y = rv[1];
441 ret.z = rv[2];
442 ret.w = rv[3];
443 return ret;
444 }
__ldg(const double2 * ptr)445 inline __device__ double2 __ldg(const double2 *ptr) {
446 typedef double d2 __attribute__((ext_vector_type(2)));
447 d2 rv = __nvvm_ldg_d2(reinterpret_cast<const d2 *>(ptr));
448 double2 ret;
449 ret.x = rv[0];
450 ret.y = rv[1];
451 return ret;
452 }
453
454 // TODO: Implement these as intrinsics, so the backend can work its magic on
455 // these. Alternatively, we could implement these as plain C and try to get
456 // llvm to recognize the relevant patterns.
__funnelshift_l(unsigned low32,unsigned high32,unsigned shiftWidth)457 inline __device__ unsigned __funnelshift_l(unsigned low32, unsigned high32,
458 unsigned shiftWidth) {
459 unsigned result;
460 asm("shf.l.wrap.b32 %0, %1, %2, %3;"
461 : "=r"(result)
462 : "r"(low32), "r"(high32), "r"(shiftWidth));
463 return result;
464 }
__funnelshift_lc(unsigned low32,unsigned high32,unsigned shiftWidth)465 inline __device__ unsigned __funnelshift_lc(unsigned low32, unsigned high32,
466 unsigned shiftWidth) {
467 unsigned result;
468 asm("shf.l.clamp.b32 %0, %1, %2, %3;"
469 : "=r"(result)
470 : "r"(low32), "r"(high32), "r"(shiftWidth));
471 return result;
472 }
__funnelshift_r(unsigned low32,unsigned high32,unsigned shiftWidth)473 inline __device__ unsigned __funnelshift_r(unsigned low32, unsigned high32,
474 unsigned shiftWidth) {
475 unsigned result;
476 asm("shf.r.wrap.b32 %0, %1, %2, %3;"
477 : "=r"(result)
478 : "r"(low32), "r"(high32), "r"(shiftWidth));
479 return result;
480 }
__funnelshift_rc(unsigned low32,unsigned high32,unsigned shiftWidth)481 inline __device__ unsigned __funnelshift_rc(unsigned low32, unsigned high32,
482 unsigned shiftWidth) {
483 unsigned ret;
484 asm("shf.r.clamp.b32 %0, %1, %2, %3;"
485 : "=r"(ret)
486 : "r"(low32), "r"(high32), "r"(shiftWidth));
487 return ret;
488 }
489
490 #endif // !defined(__CUDA_ARCH__) || __CUDA_ARCH__ >= 320
491
492 #endif // defined(__CLANG_CUDA_INTRINSICS_H__)
493