1 // Auto-generated file. Do not edit!
2 // Template: src/f16-vhswish/neonfp16arith.c.in
3 // Generator: tools/xngen
4 //
5 // Copyright 2020 Google LLC
6 //
7 // This source code is licensed under the BSD-style license found in the
8 // LICENSE file in the root directory of this source tree.
9
10 #include <assert.h>
11
12 #include <arm_neon.h>
13
14 #include <xnnpack/common.h>
15 #include <xnnpack/vunary.h>
16
17
xnn_f16_vhswish_ukernel__neonfp16arith_x8(size_t n,const void * restrict x_ptr,void * restrict y_ptr,const union xnn_f16_hswish_params params[restrict XNN_MIN_ELEMENTS (1)])18 void xnn_f16_vhswish_ukernel__neonfp16arith_x8(
19 size_t n,
20 const void* restrict x_ptr,
21 void* restrict y_ptr,
22 const union xnn_f16_hswish_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
23 {
24 assert(n != 0);
25 assert(n % sizeof(__fp16) == 0);
26
27 const __fp16* x = (const __fp16*) x_ptr;
28 __fp16* y = (__fp16*) y_ptr;
29
30 const float16x8_t vsixth = vreinterpretq_f16_u16(vld1q_dup_u16(¶ms->neon.sixth));
31 const float16x8_t vthree = vreinterpretq_f16_u16(vld1q_dup_u16(¶ms->neon.three));
32 const int16x8_t vsix = vreinterpretq_s16_u16(vld1q_dup_u16(¶ms->neon.six));
33 const int16x8_t vzero = vdupq_n_s16(0);
34
35 for (; n >= 8 * sizeof(__fp16); n -= 8 * sizeof(__fp16)) {
36 float16x8_t vx = vld1q_f16(x); x += 8;
37 float16x8_t vacc = vaddq_f16(vx, vthree);
38 vx = vmulq_f16(vx, vsixth);
39 vacc = vreinterpretq_f16_s16(vmaxq_s16(vreinterpretq_s16_f16(vacc), vzero));
40 vacc = vreinterpretq_f16_s16(vminq_s16(vreinterpretq_s16_f16(vacc), vsix));
41 vacc = vmulq_f16(vacc, vx);
42 vst1q_f16(y, vacc); y += 8;
43 }
44 if XNN_UNLIKELY(n != 0) {
45 float16x8_t vx = vld1q_f16(x);
46 float16x8_t vacc = vaddq_f16(vx, vthree);
47 vx = vmulq_f16(vx, vsixth);
48 vacc = vreinterpretq_f16_s16(vmaxq_s16(vreinterpretq_s16_f16(vacc), vzero));
49 vacc = vreinterpretq_f16_s16(vminq_s16(vreinterpretq_s16_f16(vacc), vsix));
50 vacc = vmulq_f16(vacc, vx);
51
52 float16x4_t vacc_lo = vget_low_f16(vacc);
53 if (n & (4 * sizeof(__fp16))) {
54 vst1_f16(y, vacc_lo); y += 4;
55 vacc_lo = vget_high_f16(vacc);
56 }
57 if (n & (2 * sizeof(__fp16))) {
58 vst1_lane_u32((void*) y, vreinterpret_u32_f16(vacc_lo), 0); y += 2;
59 vacc_lo = vext_f16(vacc_lo, vacc_lo, 2);
60 }
61 if (n & (1 * sizeof(__fp16))) {
62 vst1_lane_f16(y, vacc_lo, 0);
63 }
64 }
65 }
66