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$ABC = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
9#include <assert.h>
10
11#include <arm_neon.h>
12
13#include <xnnpack/clamp.h>
14#include <xnnpack/common.h>
15
16
17void xnn_f32_clamp_ukernel__neon_x${BATCH_TILE}(
18    size_t n,
19    const float* x,
20    float* y,
21    const union xnn_f32_minmax_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_DISABLE_TSAN
22{
23  assert(n != 0);
24  assert(n % sizeof(float) == 0);
25  assert(x != NULL);
26  assert(y != NULL);
27
28  const float32x4_t vy_min = vld1q_dup_f32(&params->scalar.min);
29  const float32x4_t vy_max = vld1q_dup_f32(&params->scalar.max);
30
31  for (; n >= ${BATCH_TILE} * sizeof(float); n -= ${BATCH_TILE} * sizeof(float)) {
32    $for N in range(0, BATCH_TILE, 4):
33      float32x4_t vacc${ABC[N:N+4]} = vld1q_f32(x); x += 4;
34
35    $for N in range(0, BATCH_TILE, 4):
36      vacc${ABC[N:N+4]} = vmaxq_f32(vacc${ABC[N:N+4]}, vy_min);
37
38    $for N in range(0, BATCH_TILE, 4):
39      vacc${ABC[N:N+4]} = vminq_f32(vacc${ABC[N:N+4]}, vy_max);
40
41    $for N in range(0, BATCH_TILE, 4):
42      vst1q_f32(y, vacc${ABC[N:N+4]}); y += 4;
43  }
44  $if BATCH_TILE > 4:
45    for (; n >= 4 * sizeof(float); n -= 4 * sizeof(float)) {
46      float32x4_t vacc = vld1q_f32(x); x += 4;
47      vacc = vmaxq_f32(vacc, vy_min);
48      vacc = vminq_f32(vacc, vy_max);
49      vst1q_f32(y, vacc); y += 4;
50    }
51  if XNN_UNLIKELY(n != 0) {
52    float32x4_t vacc = vld1q_f32(x);
53    vacc = vmaxq_f32(vacc, vy_min);
54    vacc = vminq_f32(vacc, vy_max);
55
56    float32x2_t vacc_lo = vget_low_f32(vacc);
57    if (n & (2 * sizeof(float))) {
58      vst1_f32(y, vacc_lo); y += 2;
59      vacc_lo = vget_high_f32(vacc);
60    }
61    if (n & (1 * sizeof(float))) {
62      vst1_lane_f32(y, vacc_lo, 0);
63    }
64  }
65}
66