323 lines
13 KiB
C
323 lines
13 KiB
C
/*===--- __clang_cuda_intrinsics.h - Device-side CUDA intrinsic wrappers ---===
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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*===-----------------------------------------------------------------------===
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*/
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#ifndef __CLANG_CUDA_INTRINSICS_H__
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#define __CLANG_CUDA_INTRINSICS_H__
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#ifndef __CUDA__
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#error "This file is for CUDA compilation only."
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#endif
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// sm_30 intrinsics: __shfl_{up,down,xor}.
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#define __SM_30_INTRINSICS_H__
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#define __SM_30_INTRINSICS_HPP__
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#if !defined(__CUDA_ARCH__) || __CUDA_ARCH__ >= 300
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#pragma push_macro("__MAKE_SHUFFLES")
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#define __MAKE_SHUFFLES(__FnName, __IntIntrinsic, __FloatIntrinsic, __Mask) \
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inline __device__ int __FnName(int __val, int __offset, \
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int __width = warpSize) { \
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return __IntIntrinsic(__val, __offset, \
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((warpSize - __width) << 8) | (__Mask)); \
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} \
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inline __device__ float __FnName(float __val, int __offset, \
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int __width = warpSize) { \
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return __FloatIntrinsic(__val, __offset, \
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((warpSize - __width) << 8) | (__Mask)); \
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} \
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inline __device__ unsigned int __FnName(unsigned int __val, int __offset, \
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int __width = warpSize) { \
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return static_cast<unsigned int>( \
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::__FnName(static_cast<int>(__val), __offset, __width)); \
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} \
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inline __device__ long long __FnName(long long __val, int __offset, \
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int __width = warpSize) { \
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struct __Bits { \
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int __a, __b; \
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}; \
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_Static_assert(sizeof(__val) == sizeof(__Bits)); \
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_Static_assert(sizeof(__Bits) == 2 * sizeof(int)); \
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__Bits __tmp; \
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memcpy(&__val, &__tmp, sizeof(__val)); \
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__tmp.__a = ::__FnName(__tmp.__a, __offset, __width); \
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__tmp.__b = ::__FnName(__tmp.__b, __offset, __width); \
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long long __ret; \
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memcpy(&__ret, &__tmp, sizeof(__tmp)); \
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return __ret; \
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} \
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inline __device__ unsigned long long __FnName( \
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unsigned long long __val, int __offset, int __width = warpSize) { \
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return static_cast<unsigned long long>(::__FnName( \
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static_cast<unsigned long long>(__val), __offset, __width)); \
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} \
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inline __device__ double __FnName(double __val, int __offset, \
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int __width = warpSize) { \
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long long __tmp; \
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_Static_assert(sizeof(__tmp) == sizeof(__val)); \
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memcpy(&__tmp, &__val, sizeof(__val)); \
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__tmp = ::__FnName(__tmp, __offset, __width); \
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double __ret; \
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memcpy(&__ret, &__tmp, sizeof(__ret)); \
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return __ret; \
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}
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__MAKE_SHUFFLES(__shfl, __nvvm_shfl_idx_i32, __nvvm_shfl_idx_f32, 0x1f);
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// We use 0 rather than 31 as our mask, because shfl.up applies to lanes >=
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// maxLane.
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__MAKE_SHUFFLES(__shfl_up, __nvvm_shfl_up_i32, __nvvm_shfl_up_f32, 0);
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__MAKE_SHUFFLES(__shfl_down, __nvvm_shfl_down_i32, __nvvm_shfl_down_f32, 0x1f);
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__MAKE_SHUFFLES(__shfl_xor, __nvvm_shfl_bfly_i32, __nvvm_shfl_bfly_f32, 0x1f);
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#pragma pop_macro("__MAKE_SHUFFLES")
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#endif // !defined(__CUDA_ARCH__) || __CUDA_ARCH__ >= 300
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// sm_32 intrinsics: __ldg and __funnelshift_{l,lc,r,rc}.
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// Prevent the vanilla sm_32 intrinsics header from being included.
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#define __SM_32_INTRINSICS_H__
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#define __SM_32_INTRINSICS_HPP__
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#if !defined(__CUDA_ARCH__) || __CUDA_ARCH__ >= 320
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inline __device__ char __ldg(const char *ptr) { return __nvvm_ldg_c(ptr); }
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inline __device__ short __ldg(const short *ptr) { return __nvvm_ldg_s(ptr); }
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inline __device__ int __ldg(const int *ptr) { return __nvvm_ldg_i(ptr); }
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inline __device__ long __ldg(const long *ptr) { return __nvvm_ldg_l(ptr); }
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inline __device__ long long __ldg(const long long *ptr) {
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return __nvvm_ldg_ll(ptr);
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}
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inline __device__ unsigned char __ldg(const unsigned char *ptr) {
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return __nvvm_ldg_uc(ptr);
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}
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inline __device__ unsigned short __ldg(const unsigned short *ptr) {
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return __nvvm_ldg_us(ptr);
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}
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inline __device__ unsigned int __ldg(const unsigned int *ptr) {
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return __nvvm_ldg_ui(ptr);
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}
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inline __device__ unsigned long __ldg(const unsigned long *ptr) {
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return __nvvm_ldg_ul(ptr);
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}
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inline __device__ unsigned long long __ldg(const unsigned long long *ptr) {
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return __nvvm_ldg_ull(ptr);
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}
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inline __device__ float __ldg(const float *ptr) { return __nvvm_ldg_f(ptr); }
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inline __device__ double __ldg(const double *ptr) { return __nvvm_ldg_d(ptr); }
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inline __device__ char2 __ldg(const char2 *ptr) {
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typedef char c2 __attribute__((ext_vector_type(2)));
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// We can assume that ptr is aligned at least to char2's alignment, but the
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// load will assume that ptr is aligned to char2's alignment. This is only
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// safe if alignof(c2) <= alignof(char2).
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c2 rv = __nvvm_ldg_c2(reinterpret_cast<const c2 *>(ptr));
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char2 ret;
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ret.x = rv[0];
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ret.y = rv[1];
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return ret;
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}
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inline __device__ char4 __ldg(const char4 *ptr) {
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typedef char c4 __attribute__((ext_vector_type(4)));
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c4 rv = __nvvm_ldg_c4(reinterpret_cast<const c4 *>(ptr));
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char4 ret;
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ret.x = rv[0];
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ret.y = rv[1];
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ret.z = rv[2];
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ret.w = rv[3];
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return ret;
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}
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inline __device__ short2 __ldg(const short2 *ptr) {
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typedef short s2 __attribute__((ext_vector_type(2)));
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s2 rv = __nvvm_ldg_s2(reinterpret_cast<const s2 *>(ptr));
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short2 ret;
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ret.x = rv[0];
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ret.y = rv[1];
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return ret;
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}
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inline __device__ short4 __ldg(const short4 *ptr) {
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typedef short s4 __attribute__((ext_vector_type(4)));
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s4 rv = __nvvm_ldg_s4(reinterpret_cast<const s4 *>(ptr));
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short4 ret;
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ret.x = rv[0];
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ret.y = rv[1];
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ret.z = rv[2];
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ret.w = rv[3];
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return ret;
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}
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inline __device__ int2 __ldg(const int2 *ptr) {
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typedef int i2 __attribute__((ext_vector_type(2)));
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i2 rv = __nvvm_ldg_i2(reinterpret_cast<const i2 *>(ptr));
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int2 ret;
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ret.x = rv[0];
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ret.y = rv[1];
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return ret;
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}
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inline __device__ int4 __ldg(const int4 *ptr) {
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typedef int i4 __attribute__((ext_vector_type(4)));
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i4 rv = __nvvm_ldg_i4(reinterpret_cast<const i4 *>(ptr));
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int4 ret;
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ret.x = rv[0];
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ret.y = rv[1];
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ret.z = rv[2];
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ret.w = rv[3];
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return ret;
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}
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inline __device__ longlong2 __ldg(const longlong2 *ptr) {
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typedef long long ll2 __attribute__((ext_vector_type(2)));
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ll2 rv = __nvvm_ldg_ll2(reinterpret_cast<const ll2 *>(ptr));
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longlong2 ret;
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ret.x = rv[0];
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ret.y = rv[1];
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return ret;
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}
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inline __device__ uchar2 __ldg(const uchar2 *ptr) {
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typedef unsigned char uc2 __attribute__((ext_vector_type(2)));
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uc2 rv = __nvvm_ldg_uc2(reinterpret_cast<const uc2 *>(ptr));
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uchar2 ret;
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ret.x = rv[0];
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ret.y = rv[1];
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return ret;
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}
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inline __device__ uchar4 __ldg(const uchar4 *ptr) {
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typedef unsigned char uc4 __attribute__((ext_vector_type(4)));
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uc4 rv = __nvvm_ldg_uc4(reinterpret_cast<const uc4 *>(ptr));
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uchar4 ret;
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ret.x = rv[0];
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ret.y = rv[1];
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ret.z = rv[2];
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ret.w = rv[3];
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return ret;
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}
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inline __device__ ushort2 __ldg(const ushort2 *ptr) {
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typedef unsigned short us2 __attribute__((ext_vector_type(2)));
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us2 rv = __nvvm_ldg_us2(reinterpret_cast<const us2 *>(ptr));
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ushort2 ret;
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ret.x = rv[0];
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ret.y = rv[1];
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return ret;
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}
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inline __device__ ushort4 __ldg(const ushort4 *ptr) {
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typedef unsigned short us4 __attribute__((ext_vector_type(4)));
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us4 rv = __nvvm_ldg_us4(reinterpret_cast<const us4 *>(ptr));
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ushort4 ret;
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ret.x = rv[0];
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ret.y = rv[1];
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ret.z = rv[2];
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ret.w = rv[3];
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return ret;
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}
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inline __device__ uint2 __ldg(const uint2 *ptr) {
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typedef unsigned int ui2 __attribute__((ext_vector_type(2)));
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ui2 rv = __nvvm_ldg_ui2(reinterpret_cast<const ui2 *>(ptr));
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uint2 ret;
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ret.x = rv[0];
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ret.y = rv[1];
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return ret;
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}
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inline __device__ uint4 __ldg(const uint4 *ptr) {
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typedef unsigned int ui4 __attribute__((ext_vector_type(4)));
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ui4 rv = __nvvm_ldg_ui4(reinterpret_cast<const ui4 *>(ptr));
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uint4 ret;
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ret.x = rv[0];
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ret.y = rv[1];
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ret.z = rv[2];
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ret.w = rv[3];
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return ret;
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}
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inline __device__ ulonglong2 __ldg(const ulonglong2 *ptr) {
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typedef unsigned long long ull2 __attribute__((ext_vector_type(2)));
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ull2 rv = __nvvm_ldg_ull2(reinterpret_cast<const ull2 *>(ptr));
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ulonglong2 ret;
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ret.x = rv[0];
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ret.y = rv[1];
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return ret;
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}
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inline __device__ float2 __ldg(const float2 *ptr) {
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typedef float f2 __attribute__((ext_vector_type(2)));
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f2 rv = __nvvm_ldg_f2(reinterpret_cast<const f2 *>(ptr));
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float2 ret;
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ret.x = rv[0];
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ret.y = rv[1];
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return ret;
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}
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inline __device__ float4 __ldg(const float4 *ptr) {
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typedef float f4 __attribute__((ext_vector_type(4)));
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f4 rv = __nvvm_ldg_f4(reinterpret_cast<const f4 *>(ptr));
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float4 ret;
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ret.x = rv[0];
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ret.y = rv[1];
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ret.z = rv[2];
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ret.w = rv[3];
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return ret;
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}
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inline __device__ double2 __ldg(const double2 *ptr) {
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typedef double d2 __attribute__((ext_vector_type(2)));
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d2 rv = __nvvm_ldg_d2(reinterpret_cast<const d2 *>(ptr));
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double2 ret;
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ret.x = rv[0];
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ret.y = rv[1];
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return ret;
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}
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// TODO: Implement these as intrinsics, so the backend can work its magic on
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// these. Alternatively, we could implement these as plain C and try to get
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// llvm to recognize the relevant patterns.
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inline __device__ unsigned __funnelshift_l(unsigned low32, unsigned high32,
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unsigned shiftWidth) {
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unsigned result;
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asm("shf.l.wrap.b32 %0, %1, %2, %3;"
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: "=r"(result)
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: "r"(low32), "r"(high32), "r"(shiftWidth));
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return result;
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}
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inline __device__ unsigned __funnelshift_lc(unsigned low32, unsigned high32,
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unsigned shiftWidth) {
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unsigned result;
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asm("shf.l.clamp.b32 %0, %1, %2, %3;"
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: "=r"(result)
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: "r"(low32), "r"(high32), "r"(shiftWidth));
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return result;
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}
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inline __device__ unsigned __funnelshift_r(unsigned low32, unsigned high32,
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unsigned shiftWidth) {
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unsigned result;
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asm("shf.r.wrap.b32 %0, %1, %2, %3;"
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: "=r"(result)
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: "r"(low32), "r"(high32), "r"(shiftWidth));
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return result;
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}
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inline __device__ unsigned __funnelshift_rc(unsigned low32, unsigned high32,
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unsigned shiftWidth) {
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unsigned ret;
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asm("shf.r.clamp.b32 %0, %1, %2, %3;"
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: "=r"(ret)
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: "r"(low32), "r"(high32), "r"(shiftWidth));
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return ret;
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}
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#endif // !defined(__CUDA_ARCH__) || __CUDA_ARCH__ >= 320
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#endif // defined(__CLANG_CUDA_INTRINSICS_H__)
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