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$ABC = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ" 9#include <assert.h> 10 11#include <arm_neon.h> 12 13#include <xnnpack/vunary.h> 14#include <xnnpack/common.h> 15 16 17void xnn_f16_relu_ukernel__neonfp16arith_x${BATCH_TILE}( 18 size_t n, 19 const void* restrict x_ptr, 20 void* restrict y_ptr, 21 const struct xnn_f16_relu_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_DISABLE_TSAN 22{ 23 assert(n != 0); 24 assert(n % sizeof(__fp16) == 0); 25 assert(x_ptr != NULL); 26 assert(y_ptr != NULL); 27 28 const __fp16* x = (const __fp16*) x_ptr; 29 __fp16* y = (__fp16*) y_ptr; 30 31 const float16x8_t vzero = vmovq_n_f16(0); 32 33 for (; n >= ${BATCH_TILE} * sizeof(__fp16); n -= ${BATCH_TILE} * sizeof(__fp16)) { 34 $for N in range(0, BATCH_TILE, 8): 35 float16x8_t vacc${ABC[N:N+8]} = vld1q_f16(x); x += 8; 36 37 $for N in range(0, BATCH_TILE, 8): 38 vacc${ABC[N:N+8]} = vmaxq_f16(vacc${ABC[N:N+8]}, vzero); 39 40 $for N in range(0, BATCH_TILE, 8): 41 vst1q_f16(y, vacc${ABC[N:N+8]}); y += 8; 42 } 43 $if BATCH_TILE > 8: 44 for (; n >= 8 * sizeof(__fp16); n -= 8 * sizeof(__fp16)) { 45 float16x8_t vacc = vld1q_f16(x); x += 8; 46 vacc = vmaxq_f16(vacc, vzero); 47 vst1q_f16(y, vacc); y += 8; 48 } 49 if XNN_UNLIKELY(n != 0) { 50 float16x8_t vacc = vld1q_f16(x); 51 vacc = vmaxq_f16(vacc, vzero); 52 53 float16x4_t vacc_lo = vget_low_f16(vacc); 54 if (n & (4 * sizeof(__fp16))) { 55 vst1_f16(y, vacc_lo); y += 4; 56 vacc_lo = vget_high_f16(vacc); 57 } 58 if (n & (2 * sizeof(__fp16))) { 59 vst1_lane_u32(__builtin_assume_aligned(y, 1), vreinterpret_u32_f16(vacc_lo), 0); y += 2; 60 vacc_lo = vext_f16(vacc_lo, vacc_lo, 2); 61 } 62 if (n & (1 * sizeof(__fp16))) { 63 vst1_lane_f16(y, vacc_lo, 0); 64 } 65 } 66} 67