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$ABC = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ" 9#include <assert.h> 10 11#include <arm_neon.h> 12 13#include <xnnpack/common.h> 14#include <xnnpack/math.h> 15#include <xnnpack/vunary.h> 16 17 18void xnn_f32_vrndd_ukernel__neon_x${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_DISABLE_TSAN 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 const uint32x4_t vone = vreinterpretq_u32_f32(vmovq_n_f32(1.0f)); 29 for (; n >= ${BATCH_TILE} * sizeof(float); n -= ${BATCH_TILE} * sizeof(float)) { 30 $for N in range(0, BATCH_TILE, 4): 31 const float32x4_t vx${ABC[N:N+4]} = vld1q_f32(x); x += 4; 32 33 $for N in range(0, BATCH_TILE, 4): 34 const int32x4_t vintx${ABC[N:N+4]} = vcvtq_s32_f32(vx${ABC[N:N+4]}); 35 36 $for N in range(0, BATCH_TILE, 4): 37 uint32x4_t vrndmask${ABC[N:N+4]} = vcaltq_f32(vx${ABC[N:N+4]}, vintegral_threshold); 38 39 $for N in range(0, BATCH_TILE, 4): 40 const float32x4_t vprerndx${ABC[N:N+4]} = vcvtq_f32_s32(vintx${ABC[N:N+4]}); 41 42 $for N in range(0, BATCH_TILE, 4): 43 vrndmask${ABC[N:N+4]} = vbicq_u32(vrndmask${ABC[N:N+4]}, vmovq_n_u32(UINT32_C(0x80000000))); 44 45 $for N in range(0, BATCH_TILE, 4): 46 const float32x4_t vrndx${ABC[N:N+4]} = vbslq_f32(vrndmask${ABC[N:N+4]}, vprerndx${ABC[N:N+4]}, vx${ABC[N:N+4]}); 47 48 $for N in range(0, BATCH_TILE, 4): 49 const uint32x4_t vadjmask${ABC[N:N+4]} = vcgtq_f32(vrndx${ABC[N:N+4]}, vx${ABC[N:N+4]}); 50 51 $for N in range(0, BATCH_TILE, 4): 52 const float32x4_t vadjrndx${ABC[N:N+4]} = vreinterpretq_f32_u32(vandq_u32(vadjmask${ABC[N:N+4]}, vone)); 53 54 $for N in range(0, BATCH_TILE, 4): 55 const float32x4_t vy${ABC[N:N+4]} = vsubq_f32(vrndx${ABC[N:N+4]}, vadjrndx${ABC[N:N+4]}); 56 57 $for N in range(0, BATCH_TILE, 4): 58 vst1q_f32(y, vy${ABC[N:N+4]}); y += 4; 59 } 60 $if BATCH_TILE > 4: 61 for (; n >= 4 * sizeof(float); n -= 4 * sizeof(float)) { 62 const float32x4_t vx = vld1q_f32(x); x += 4; 63 const int32x4_t vintx = vcvtq_s32_f32(vx); 64 uint32x4_t vrndmask = vcaltq_f32(vx, vintegral_threshold); 65 const float32x4_t vprerndx = vcvtq_f32_s32(vintx); 66 vrndmask = vbicq_u32(vrndmask, vmovq_n_u32(UINT32_C(0x80000000))); 67 const float32x4_t vrndx = vbslq_f32(vrndmask, vprerndx, vx); 68 const uint32x4_t vadjmask = vcgtq_f32(vrndx, vx); 69 const float32x4_t vadjrndx = vreinterpretq_f32_u32(vandq_u32(vadjmask, vone)); 70 const float32x4_t vy = vsubq_f32(vrndx, vadjrndx); 71 vst1q_f32(y, vy); y += 4; 72 } 73 if XNN_UNLIKELY(n != 0) { 74 const float32x4_t vx = vld1q_f32(x); 75 const int32x4_t vintx = vcvtq_s32_f32(vx); 76 uint32x4_t vrndmask = vcaltq_f32(vx, vintegral_threshold); 77 const float32x4_t vprerndx = vcvtq_f32_s32(vintx); 78 vrndmask = vbicq_u32(vrndmask, vmovq_n_u32(UINT32_C(0x80000000))); 79 const float32x4_t vrndx = vbslq_f32(vrndmask, vprerndx, vx); 80 const uint32x4_t vadjmask = vcgtq_f32(vrndx, vx); 81 const float32x4_t vadjrndx = vreinterpretq_f32_u32(vandq_u32(vadjmask, vone)); 82 const float32x4_t vy = vsubq_f32(vrndx, vadjrndx); 83 float32x2_t vy_lo = vget_low_f32(vy); 84 if (n & (2 * sizeof(float))) { 85 vst1_f32(y, vy_lo); y += 2; 86 vy_lo = vget_high_f32(vy); 87 } 88 if (n & (1 * sizeof(float))) { 89 vst1_lane_f32(y, vy_lo, 0); 90 } 91 } 92} 93