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_x8(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_x8(
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 >= 8 * sizeof(uint16_t); n -= 8 * sizeof(uint16_t)) {
31 const float16x8_t vh = vreinterpretq_f16_u16(vld1q_u16(i)); i += 8;
32
33 const float32x4_t vf_lo = vcvt_f32_f16(vget_low_f16(vh));
34 const float32x4_t vf_hi = vcvt_f32_f16(vget_high_f16(vh));
35
36 vst1q_f32(output, vf_lo); output += 4;
37 vst1q_f32(output, vf_hi); output += 4;
38 }
39 if XNN_UNLIKELY(n != 0) {
40 assert(n >= 1 * sizeof(uint16_t));
41 assert(n <= 7 * sizeof(uint16_t));
42 const float16x8_t vh = vreinterpretq_f16_u16(vld1q_u16(i)); i += 8;
43
44 float32x4_t vf = vcvt_f32_f16(vget_low_f16(vh));
45 if (n & (4 * sizeof(uint16_t))) {
46 vst1q_f32(output, vf); output += 4;
47 vf = vcvt_f32_f16(vget_high_f16(vh));
48 }
49 float32x2_t vf_lo = vget_low_f32(vf);
50 if (n & (2 * sizeof(uint16_t))) {
51 vst1_f32(output, vf_lo); output += 2;
52 vf_lo = vget_high_f32(vf);
53 }
54 if (n & (1 * sizeof(uint16_t))) {
55 vst1_lane_f32(output, vf_lo, 0);
56 }
57 }
58 }
59