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$assert BATCH_TILE % 4 == 0 7$assert BATCH_TILE >= 4 8$ABC = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ" 9#include <assert.h> 10 11#include <arm_neon.h> 12 13#include <xnnpack/common.h> 14#include <xnnpack/math.h> 15#include <xnnpack/vunary.h> 16 17 18void xnn_f32_vrndz_ukernel__neon_x${BATCH_TILE}( 19 size_t n, 20 const float* x, 21 float* y, 22 const union xnn_f32_rnd_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS 23{ 24 assert(n != 0); 25 assert(n % sizeof(float) == 0); 26 27 const float32x4_t vintegral_threshold = vreinterpretq_f32_u32(vmovq_n_u32(UINT32_C(0x4B000000))); 28 for (; n >= ${BATCH_TILE} * sizeof(float); n -= ${BATCH_TILE} * sizeof(float)) { 29 $for N in range(0, BATCH_TILE, 4): 30 const float32x4_t vx${ABC[N:N+4]} = vld1q_f32(x); x += 4; 31 32 $for N in range(0, BATCH_TILE, 4): 33 const int32x4_t vintx${ABC[N:N+4]} = vcvtq_s32_f32(vx${ABC[N:N+4]}); 34 35 $for N in range(0, BATCH_TILE, 4): 36 uint32x4_t vrndmask${ABC[N:N+4]} = vcaltq_f32(vx${ABC[N:N+4]}, vintegral_threshold); 37 38 $for N in range(0, BATCH_TILE, 4): 39 const float32x4_t vrndx${ABC[N:N+4]} = vcvtq_f32_s32(vintx${ABC[N:N+4]}); 40 41 $for N in range(0, BATCH_TILE, 4): 42 vrndmask${ABC[N:N+4]} = vbicq_u32(vrndmask${ABC[N:N+4]}, vmovq_n_u32(UINT32_C(0x80000000))); 43 44 $for N in range(0, BATCH_TILE, 4): 45 const float32x4_t vy${ABC[N:N+4]} = vbslq_f32(vrndmask${ABC[N:N+4]}, vrndx${ABC[N:N+4]}, vx${ABC[N:N+4]}); 46 47 $for N in range(0, BATCH_TILE, 4): 48 vst1q_f32(y, vy${ABC[N:N+4]}); y += 4; 49 } 50 $if BATCH_TILE > 4: 51 for (; n >= 4 * sizeof(float); n -= 4 * sizeof(float)) { 52 const float32x4_t vx = vld1q_f32(x); x += 4; 53 const int32x4_t vintx = vcvtq_s32_f32(vx); 54 uint32x4_t vrndmask = vcaltq_f32(vx, vintegral_threshold); 55 const float32x4_t vrndx = vcvtq_f32_s32(vintx); 56 vrndmask = vbicq_u32(vrndmask, vmovq_n_u32(UINT32_C(0x80000000))); 57 const float32x4_t vy = vbslq_f32(vrndmask, vrndx, vx); 58 vst1q_f32(y, vy); y += 4; 59 } 60 if XNN_UNLIKELY(n != 0) { 61 const float32x4_t vx = vld1q_f32(x); 62 const int32x4_t vintx = vcvtq_s32_f32(vx); 63 uint32x4_t vrndmask = vcaltq_f32(vx, vintegral_threshold); 64 const float32x4_t vrndx = vcvtq_f32_s32(vintx); 65 vrndmask = vbicq_u32(vrndmask, vmovq_n_u32(UINT32_C(0x80000000))); 66 const float32x4_t vy = vbslq_f32(vrndmask, vrndx, vx); 67 float32x2_t vy_lo = vget_low_f32(vy); 68 if (n & (2 * sizeof(float))) { 69 vst1_f32(y, vy_lo); y += 2; 70 vy_lo = vget_high_f32(vy); 71 } 72 if (n & (1 * sizeof(float))) { 73 vst1_lane_f32(y, vy_lo, 0); 74 } 75 } 76} 77