1// Copyright 2020 Google LLC 2// 3// This source code is licensed under the BSD-style license found in the 4// LICENSE file in the root directory of this source tree. 5 6$assert BATCH_TILE % 8 == 0 7$assert BATCH_TILE >= 8 8$ABC = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ" 9#include <assert.h> 10 11#include <immintrin.h> 12 13#include <xnnpack/common.h> 14#include <xnnpack/vunary.h> 15 16 17static const int32_t mask_table[14] = {-1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0}; 18 19void xnn_f32_vsqrt_ukernel__avx_sqrt_x${BATCH_TILE}( 20 size_t n, 21 const float* x, 22 float* y, 23 const union xnn_f32_sqrt_params params[restrict XNN_MIN_ELEMENTS(1)]) 24{ 25 assert(n != 0); 26 assert(n % sizeof(float) == 0); 27 28 $if BATCH_TILE > 8: 29 for (; n >= ${BATCH_TILE} * sizeof(float); n -= ${BATCH_TILE} * sizeof(float)) { 30 const __m256 vx${ABC[0:8]} = _mm256_loadu_ps(x); 31 $for N in range(8, BATCH_TILE, 8): 32 const __m256 vx${ABC[N:N+8]} = _mm256_loadu_ps(x + ${N}); 33 x += ${BATCH_TILE}; 34 35 $for N in range(0, BATCH_TILE, 8): 36 const __m256 vy${ABC[N:N+8]} = _mm256_sqrt_ps(vx${ABC[N:N+8]}); 37 38 _mm256_storeu_ps(y, vy${ABC[0:8]}); 39 $for N in range(8, BATCH_TILE, 8): 40 _mm256_storeu_ps(y + ${N}, vy${ABC[N:N+8]}); 41 y += ${BATCH_TILE}; 42 } 43 for (; n >= 8 * sizeof(float); n -= 8 * sizeof(float)) { 44 const __m256 vx = _mm256_loadu_ps(x); 45 x += 8; 46 const __m256 vy = _mm256_sqrt_ps(vx); 47 _mm256_storeu_ps(y, vy); 48 y += 8; 49 } 50 if XNN_UNLIKELY(n != 0) { 51 assert(n >= 1 * sizeof(float)); 52 assert(n <= 7 * sizeof(float)); 53 __m256i vmask = _mm256_loadu_si256((const __m256i*) ((uintptr_t) &mask_table[7] - n)); 54 55 const __m256 vx = _mm256_maskload_ps(x, vmask); 56 const __m256 vy = _mm256_sqrt_ps(vx); 57 58 // _mm256_maskstore_ps(y, vmask, vy) could be used here, but triggers msan failures (probably an msan bug). 59 __m128 vy_lo = _mm256_castps256_ps128(vy); 60 if (n & (4 * sizeof(float))) { 61 _mm_storeu_ps(y, vy_lo); 62 vy_lo = _mm256_extractf128_ps(vy, 1); 63 y += 4; 64 } 65 if (n & (2 * sizeof(float))) { 66 _mm_storel_pi((__m64*) y, vy_lo); 67 vy_lo = _mm_movehl_ps(vy_lo, vy_lo); 68 y += 2; 69 } 70 if (n & (1 * sizeof(float))) { 71 _mm_store_ss(y, vy_lo); 72 } 73 } 74} 75