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$ABC = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ" 9#include <assert.h> 10 11#include <arm_neon.h> 12 13#include <xnnpack/common.h> 14#include <xnnpack/vunary.h> 15 16 17void xnn_f16_vclamp_ukernel__neonfp16arith_x${BATCH_TILE}( 18 size_t n, 19 const void* restrict x_ptr, 20 void* restrict y_ptr, 21 const union xnn_f16_minmax_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS 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 vy_min = vreinterpretq_f16_u16(vld1q_dup_u16(¶ms->neon.min)); 32 const float16x8_t vy_max = vreinterpretq_f16_u16(vld1q_dup_u16(¶ms->neon.max)); 33 34 $if BATCH_TILE > 8: 35 for (; n >= ${BATCH_TILE} * sizeof(__fp16); n -= ${BATCH_TILE} * sizeof(__fp16)) { 36 $for N in range(0, BATCH_TILE, 8): 37 float16x8_t vacc${ABC[N:N+8]} = vld1q_f16(x); x += 8; 38 39 $for N in range(0, BATCH_TILE, 8): 40 vacc${ABC[N:N+8]} = vmaxq_f16(vacc${ABC[N:N+8]}, vy_min); 41 42 $for N in range(0, BATCH_TILE, 8): 43 vacc${ABC[N:N+8]} = vminq_f16(vacc${ABC[N:N+8]}, vy_max); 44 45 $for N in range(0, BATCH_TILE, 8): 46 vst1q_f16(y, vacc${ABC[N:N+8]}); y += 8; 47 } 48 for (; n >= 8 * sizeof(__fp16); n -= 8 * sizeof(__fp16)) { 49 float16x8_t vacc = vld1q_f16(x); x += 8; 50 vacc = vmaxq_f16(vacc, vy_min); 51 vacc = vminq_f16(vacc, vy_max); 52 vst1q_f16(y, vacc); y += 8; 53 } 54 if XNN_UNLIKELY(n != 0) { 55 float16x8_t vacc = vld1q_f16(x); 56 vacc = vmaxq_f16(vacc, vy_min); 57 vacc = vminq_f16(vacc, vy_max); 58 59 float16x4_t vacc_lo = vget_low_f16(vacc); 60 if (n & (4 * sizeof(__fp16))) { 61 vst1_f16(y, vacc_lo); y += 4; 62 vacc_lo = vget_high_f16(vacc); 63 } 64 if (n & (2 * sizeof(__fp16))) { 65 vst1_lane_u32((void*) y, vreinterpret_u32_f16(vacc_lo), 0); y += 2; 66 vacc_lo = vext_f16(vacc_lo, vacc_lo, 2); 67 } 68 if (n & (1 * sizeof(__fp16))) { 69 vst1_lane_f16(y, vacc_lo, 0); 70 } 71 } 72} 73