1 // Auto-generated file. Do not edit!
2 // Template: src/f16-f32-vcvt/neonfp16.c.in
3 // Generator: tools/xngen
4 //
5 // Copyright 2021 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/vcvt.h>
16
17
xnn_f16_f32_vcvt_ukernel__neonfp16_x16(size_t n,const void * input,float * output,const union xnn_f16_f32_cvt_params params[restrict XNN_MIN_ELEMENTS (1)])18 void xnn_f16_f32_vcvt_ukernel__neonfp16_x16(
19 size_t n,
20 const void* input,
21 float* output,
22 const union xnn_f16_f32_cvt_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
23 {
24 assert(n != 0);
25 assert(n % sizeof(uint16_t) == 0);
26 assert(input != NULL);
27 assert(output != NULL);
28
29 const uint16_t* i = (const uint16_t*) input;
30 for (; n >= 16 * sizeof(uint16_t); n -= 16 * sizeof(uint16_t)) {
31 const float16x8_t vh0 = vreinterpretq_f16_u16(vld1q_u16(i)); i += 8;
32 const float16x8_t vh1 = vreinterpretq_f16_u16(vld1q_u16(i)); i += 8;
33
34 const float32x4_t vf0 = vcvt_f32_f16(vget_low_f16(vh0));
35 const float32x4_t vf1 = vcvt_f32_f16(vget_high_f16(vh0));
36 const float32x4_t vf2 = vcvt_f32_f16(vget_low_f16(vh1));
37 const float32x4_t vf3 = vcvt_f32_f16(vget_high_f16(vh1));
38
39 vst1q_f32(output, vf0); output += 4;
40 vst1q_f32(output, vf1); output += 4;
41 vst1q_f32(output, vf2); output += 4;
42 vst1q_f32(output, vf3); output += 4;
43 }
44 for (; n >= 8 * sizeof(uint16_t); n -= 8 * sizeof(uint16_t)) {
45 const float16x8_t vh = vreinterpretq_f16_u16(vld1q_u16(i)); i += 8;
46
47 const float32x4_t vf_lo = vcvt_f32_f16(vget_low_f16(vh));
48 const float32x4_t vf_hi = vcvt_f32_f16(vget_high_f16(vh));
49
50 vst1q_f32(output, vf_lo); output += 4;
51 vst1q_f32(output, vf_hi); output += 4;
52 }
53 if XNN_UNLIKELY(n != 0) {
54 assert(n >= 1 * sizeof(uint16_t));
55 assert(n <= 7 * sizeof(uint16_t));
56 const float16x8_t vh = vreinterpretq_f16_u16(vld1q_u16(i)); i += 8;
57
58 float32x4_t vf = vcvt_f32_f16(vget_low_f16(vh));
59 if (n & (4 * sizeof(uint16_t))) {
60 vst1q_f32(output, vf); output += 4;
61 vf = vcvt_f32_f16(vget_high_f16(vh));
62 }
63 float32x2_t vf_lo = vget_low_f32(vf);
64 if (n & (2 * sizeof(uint16_t))) {
65 vst1_f32(output, vf_lo); output += 2;
66 vf_lo = vget_high_f32(vf);
67 }
68 if (n & (1 * sizeof(uint16_t))) {
69 vst1_lane_f32(output, vf_lo, 0);
70 }
71 }
72 }
73