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$ABC = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ" 9#include <assert.h> 10 11#include <arm_neon.h> 12 13#include <xnnpack/common.h> 14#include <xnnpack/math.h> 15#include <xnnpack/vunary.h> 16 17 18void xnn_f32_vrndne_ukernel__neon_x${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 vmagic_number = 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 $for N in range(0, BATCH_TILE, 4): 33 const float32x4_t vabsx${ABC[N:N+4]} = vabsq_f32(vx${ABC[N:N+4]}); 34 uint32x4_t vrndmask${ABC[N:N+4]} = vcaltq_f32(vmagic_number, vx${ABC[N:N+4]}); 35 36 $for N in range(0, BATCH_TILE, 4): 37 float32x4_t vrndabsx${ABC[N:N+4]} = vaddq_f32(vabsx${ABC[N:N+4]}, vmagic_number); 38 39 $for N in range(0, BATCH_TILE, 4): 40 vrndmask${ABC[N:N+4]} = vorrq_u32(vrndmask${ABC[N:N+4]}, vmovq_n_u32(UINT32_C(0x80000000))); 41 42 $for N in range(0, BATCH_TILE, 4): 43 vrndabsx${ABC[N:N+4]} = vsubq_f32(vrndabsx${ABC[N:N+4]}, vmagic_number); 44 45 $for N in range(0, BATCH_TILE, 4): 46 const float32x4_t vy${ABC[N:N+4]} = vbslq_f32(vrndmask${ABC[N:N+4]}, vx${ABC[N:N+4]}, vrndabsx${ABC[N:N+4]}); 47 48 $for N in range(0, BATCH_TILE, 4): 49 vst1q_f32(y, vy${ABC[N:N+4]}); y += 4; 50 } 51 $if BATCH_TILE > 4: 52 for (; n >= 4 * sizeof(float); n -= 4 * sizeof(float)) { 53 const float32x4_t vx = vld1q_f32(x); x += 4; 54 const float32x4_t vabsx = vabsq_f32(vx); 55 uint32x4_t vrndmask = vcaltq_f32(vmagic_number, vx); 56 float32x4_t vrndabsx = vaddq_f32(vabsx, vmagic_number); 57 vrndmask = vorrq_u32(vrndmask, vmovq_n_u32(UINT32_C(0x80000000))); 58 vrndabsx = vsubq_f32(vrndabsx, vmagic_number); 59 const float32x4_t vy = vbslq_f32(vrndmask, vx, vrndabsx); 60 vst1q_f32(y, vy); y += 4; 61 } 62 if XNN_UNLIKELY(n != 0) { 63 const float32x4_t vx = vld1q_f32(x); 64 const float32x4_t vabsx = vabsq_f32(vx); 65 uint32x4_t vrndmask = vcaltq_f32(vmagic_number, vx); 66 float32x4_t vrndabsx = vaddq_f32(vabsx, vmagic_number); 67 vrndmask = vorrq_u32(vrndmask, vmovq_n_u32(UINT32_C(0x80000000))); 68 vrndabsx = vsubq_f32(vrndabsx, vmagic_number); 69 const float32x4_t vy = vbslq_f32(vrndmask, vx, vrndabsx); 70 float32x2_t vy_lo = vget_low_f32(vy); 71 if (n & (2 * sizeof(float))) { 72 vst1_f32(y, vy_lo); y += 2; 73 vy_lo = vget_high_f32(vy); 74 } 75 if (n & (1 * sizeof(float))) { 76 vst1_lane_f32(y, vy_lo, 0); 77 } 78 } 79} 80