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Diffstat (limited to 'src/core/NEON/kernels/arm_gemm/transforms/a64_block16_interleave4_8bit.hpp')
| -rw-r--r-- | src/core/NEON/kernels/arm_gemm/transforms/a64_block16_interleave4_8bit.hpp | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/src/core/NEON/kernels/arm_gemm/transforms/a64_block16_interleave4_8bit.hpp b/src/core/NEON/kernels/arm_gemm/transforms/a64_block16_interleave4_8bit.hpp new file mode 100644 index 0000000000..8d61f15cec --- /dev/null +++ b/src/core/NEON/kernels/arm_gemm/transforms/a64_block16_interleave4_8bit.hpp @@ -0,0 +1,131 @@ +/* + * Copyright (c) 2017-2018 ARM Limited. + * + * SPDX-License-Identifier: MIT + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +#pragma once + +#ifdef __aarch64__ + +#include <arm_neon.h> + +#include "../asmlib.hpp" +#include "../utils.hpp" + +template <> +template <typename T> +void TransformImpl<4, 16, false, 1, 1>::Transform(T *out, const T *in, int ldin, int y0, int ymax, int k0, int kmax) +{ + uint8_t *outptr = (uint8_t *)out; + const uint8_t *inptr = (uint8_t *)in; + + uint8_t zerobuff[16]; + + for(int y = y0; y < ymax; y += 4) + { + const uint8_t *inptr0 = inptr + y * ldin + k0; + const uint8_t *inptr1 = inptr0 + ldin; + const uint8_t *inptr2 = inptr1 + ldin; + const uint8_t *inptr3 = inptr2 + ldin; + + prefetch_2x(inptr0); + prefetch_2x(inptr1); + prefetch_2x(inptr2); + prefetch_2x(inptr3); + + int x = (kmax - k0); + for(; x > 15; x -= 16) + { + /* Cope with ragged cases by copying from a buffer of zeroes instead */ + if((y + 3) >= ymax) + { + switch((y + 3) - ymax) + { + /* Everything falls through in here */ + case 2: + inptr1 = zerobuff; + case 1: + inptr2 = zerobuff; + case 0: + inptr3 = zerobuff; + break; + + default: + UNREACHABLE("Impossible."); + } + } + + __asm __volatile( + "LDR q0, [%[inptr0]], #16\n" ASM_PREFETCH("[%[inptr0], #176]") "LDR q1, [%[inptr1]], #16\n" ASM_PREFETCH("[%[inptr1], #176]") + "STP q0, q1, [%[outptr]], #32\n" + "LDR q0, [%[inptr2]], #16\n" ASM_PREFETCH("[%[inptr2], #176]") "LDR q1, [%[inptr3]], #16\n" ASM_PREFETCH("[%[inptr3], #176]") "STP q0, q1, [%[outptr]], #32\n" + : [inptr0] "+r"(inptr0), [inptr1] "+r"(inptr1), [inptr2] "+r"(inptr2), [inptr3] "+r"(inptr3), + [outptr] "+r"(outptr) + : + : "v0", "v1"); + } + + if(x > 0) + { + /* Need to duplicate this here, in case we didn't run the main loop. */ + if((y + 3) >= ymax) + { + switch((y + 3) - ymax) + { + /* Everything falls through in here */ + case 2: + inptr1 = zerobuff; + case 1: + inptr2 = zerobuff; + case 0: + inptr3 = zerobuff; + break; + + default: + UNREACHABLE("Impossible."); + } + } + + /* We have to write out 16 values, copy as many legal values as there are and pad with 0 */ + auto f = [&outptr, x](const uint8_t *&p) + { + for(int i = 0; i < 16; i++) + { + if(i < x) + { + *outptr++ = *p++; + } + else + { + *outptr++ = 0; + } + } + }; + + f(inptr0); + f(inptr1); + f(inptr2); + f(inptr3); + } + } +} + +#endif // __aarch64__
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