File size: 1,594 Bytes
57c3a10 | 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 | /*
* Copyright (c) 2024 by FlashInfer team.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef FLASHINFER_FRAG_LAYOUT_SWIZZLE_CUH_
#define FLASHINFER_FRAG_LAYOUT_SWIZZLE_CUH_
#include <cuda_runtime.h>
#include <cstdint>
__device__ __forceinline__ uint32_t frag_layout_swizzle_16b_to_8b(uint32_t x) {
uint32_t tmp = __shfl_xor_sync(0xffffffff, x, 0x1);
x = __byte_perm(x, tmp, ((threadIdx.x & 0x1) == 0) ? 0x5410 : 0x3276);
tmp = __shfl_xor_sync(0xffffffff, x, 0x2);
x = __byte_perm(x, tmp, ((threadIdx.x & 0x2) == 0) ? 0x5410 : 0x3276);
return x;
}
__device__ __forceinline__ uint32_t frag_layout_swizzle_16b_to_8b_trans(uint32_t x) {
uint32_t tmp = __shfl_xor_sync(0xffffffff, x, 0x4);
x = __byte_perm(x, tmp, ((threadIdx.x & 0x4) == 0) ? 0x6420 : 0x3175);
tmp = __shfl_xor_sync(0xffffffff, x, 0x8);
x = __byte_perm(x, tmp, ((threadIdx.x & 0x8) == 0) ? 0x5410 : 0x3276);
tmp = __shfl_xor_sync(0xffffffff, x, 0x10);
x = __byte_perm(x, tmp, ((threadIdx.x & 0x10) == 0) ? 0x5410 : 0x3276);
return x;
}
#endif // FLASHINFER_FRAG_LAYOUT_SWIZZLE_CUH_
|