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_x8(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_x8(
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 >= 8 * sizeof(float); n -= 8 * sizeof(float)) {
31 const float32x4_t vf0 = vld1q_f32(input); input += 4;
32 const float32x4_t vf1 = vld1q_f32(input); input += 4;
33
34 const uint16x8_t vh0 = vreinterpretq_u16_f16(vcombine_f16(vcvt_f16_f32(vf0), vcvt_f16_f32(vf1)));
35
36 vst1q_u16(o, vh0); o += 8;
37 }
38 for (; n >= 4 * sizeof(float); n -= 4 * sizeof(float)) {
39 const float32x4_t vf = vld1q_f32(input); input += 4;
40
41 const uint16x4_t vh = vreinterpret_u16_f16(vcvt_f16_f32(vf));
42
43 vst1_u16(o, vh); o += 4;
44 }
45 if XNN_UNLIKELY(n != 0) {
46 assert(n % sizeof(float) == 0);
47 assert(n >= 1 * sizeof(float));
48 assert(n <= 3 * sizeof(float));
49 const float32x4_t vf = vld1q_f32(input);
50
51 uint16x4_t vh = vreinterpret_u16_f16(vcvt_f16_f32(vf));
52
53 if (n & (2 * sizeof(float))) {
54 vst1_lane_u32((void*) o, vreinterpret_u32_u16(vh), 0); o += 2;
55 vh = vext_u16(vh, vh, 2);
56 }
57 if (n & (1 * sizeof(float))) {
58 vst1_lane_u16(o, vh, 0);
59 }
60 }
61 }
62