1 // Auto-generated file. Do not edit!
2 // Template: src/f32-f16-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_f32_f16_vcvt_ukernel__neonfp16_x16(size_t n,const float * input,void * output,const union xnn_f32_f16_cvt_params params[restrict XNN_MIN_ELEMENTS (1)])18 void xnn_f32_f16_vcvt_ukernel__neonfp16_x16(
19 size_t n,
20 const float* input,
21 void* output,
22 const union xnn_f32_f16_cvt_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
23 {
24 assert(n != 0);
25 assert(n % sizeof(float) == 0);
26 assert(input != NULL);
27 assert(output != NULL);
28
29 uint16_t* o = (uint16_t*) output;
30 for (; n >= 16 * sizeof(float); n -= 16 * sizeof(float)) {
31 const float32x4_t vf0 = vld1q_f32(input); input += 4;
32 const float32x4_t vf1 = vld1q_f32(input); input += 4;
33 const float32x4_t vf2 = vld1q_f32(input); input += 4;
34 const float32x4_t vf3 = vld1q_f32(input); input += 4;
35
36 const uint16x8_t vh0 = vreinterpretq_u16_f16(vcombine_f16(vcvt_f16_f32(vf0), vcvt_f16_f32(vf1)));
37 const uint16x8_t vh1 = vreinterpretq_u16_f16(vcombine_f16(vcvt_f16_f32(vf2), vcvt_f16_f32(vf3)));
38
39 vst1q_u16(o, vh0); o += 8;
40 vst1q_u16(o, vh1); o += 8;
41 }
42 for (; n >= 4 * sizeof(float); n -= 4 * sizeof(float)) {
43 const float32x4_t vf = vld1q_f32(input); input += 4;
44
45 const uint16x4_t vh = vreinterpret_u16_f16(vcvt_f16_f32(vf));
46
47 vst1_u16(o, vh); o += 4;
48 }
49 if XNN_UNLIKELY(n != 0) {
50 assert(n % sizeof(float) == 0);
51 assert(n >= 1 * sizeof(float));
52 assert(n <= 3 * sizeof(float));
53 const float32x4_t vf = vld1q_f32(input);
54
55 uint16x4_t vh = vreinterpret_u16_f16(vcvt_f16_f32(vf));
56
57 if (n & (2 * sizeof(float))) {
58 vst1_lane_u32((void*) o, vreinterpret_u32_u16(vh), 0); o += 2;
59 vh = vext_u16(vh, vh, 2);
60 }
61 if (n & (1 * sizeof(float))) {
62 vst1_lane_u16(o, vh, 0);
63 }
64 }
65 }
66