1 // Auto-generated file. Do not edit!
2 // Template: src/qs8-f32-vcvt/neon.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/intrinsics-polyfill.h>
16 #include <xnnpack/vcvt.h>
17
18
xnn_qu8_f32_vcvt_ukernel__neon_x16(size_t n,const uint8_t * x,float * y,const union xnn_qu8_f32_cvt_params params[restrict XNN_MIN_ELEMENTS (1)])19 void xnn_qu8_f32_vcvt_ukernel__neon_x16(
20 size_t n,
21 const uint8_t* x,
22 float* y,
23 const union xnn_qu8_f32_cvt_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
24 {
25 assert(n != 0);
26 assert(n % sizeof(uint8_t) == 0);
27 assert(x != NULL);
28 assert(y != NULL);
29
30 const int16x8_t vminus_zero_point = vreinterpretq_s16_u32(vld1q_dup_u32((const void*) params->neon.minus_zero_point));
31 const float32x4_t vscale = vld1q_dup_f32(¶ms->neon.scale);
32 for (; n >= 16 * sizeof(uint8_t); n -= 16 * sizeof(uint8_t)) {
33 const uint8x8_t vx01234567 = vld1_u8(x); x += 8;
34 const uint8x8_t vx89ABCDEF = vld1_u8(x); x += 8;
35
36 const int16x8_t vhx01234567 = vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(vminus_zero_point), vx01234567));
37 const int16x8_t vhx89ABCDEF = vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(vminus_zero_point), vx89ABCDEF));
38
39 const int32x4_t vwx0123 = vmovl_s16(vget_low_s16(vhx01234567));
40 const int32x4_t vwx4567 = vmovl_s16(vget_high_s16(vhx01234567));
41 const int32x4_t vwx89AB = vmovl_s16(vget_low_s16(vhx89ABCDEF));
42 const int32x4_t vwxCDEF = vmovl_s16(vget_high_s16(vhx89ABCDEF));
43
44 float32x4_t vy0123 = vcvtq_f32_s32(vwx0123);
45 float32x4_t vy4567 = vcvtq_f32_s32(vwx4567);
46 float32x4_t vy89AB = vcvtq_f32_s32(vwx89AB);
47 float32x4_t vyCDEF = vcvtq_f32_s32(vwxCDEF);
48
49 vy0123 = vmulq_f32(vy0123, vscale);
50 vy4567 = vmulq_f32(vy4567, vscale);
51 vy89AB = vmulq_f32(vy89AB, vscale);
52 vyCDEF = vmulq_f32(vyCDEF, vscale);
53
54 vst1q_f32(y, vy0123); y += 4;
55 vst1q_f32(y, vy4567); y += 4;
56 vst1q_f32(y, vy89AB); y += 4;
57 vst1q_f32(y, vyCDEF); y += 4;
58 }
59 for (; n >= 8 * sizeof(uint8_t); n -= 8 * sizeof(uint8_t)) {
60 const uint8x8_t vx = vld1_u8(x); x += 8;
61
62 const int16x8_t vhx = vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(vminus_zero_point), vx));
63
64 const int32x4_t vwx_lo = vmovl_s16(vget_low_s16(vhx));
65 const int32x4_t vwx_hi = vmovl_s16(vget_high_s16(vhx));
66
67 float32x4_t vy_lo = vcvtq_f32_s32(vwx_lo);
68 float32x4_t vy_hi = vcvtq_f32_s32(vwx_hi);
69
70 vy_lo = vmulq_f32(vy_lo, vscale);
71 vy_hi = vmulq_f32(vy_hi, vscale);
72
73 vst1q_f32(y, vy_lo); y += 4;
74 vst1q_f32(y, vy_hi); y += 4;
75 }
76 if XNN_UNLIKELY(n != 0) {
77 assert(n >= 1 * sizeof(uint8_t));
78 assert(n <= 7 * sizeof(uint8_t));
79
80 const uint8x8_t vx = vld1_u8(x);
81
82 const int16x8_t vhx = vreinterpretq_s16_u16(vaddw_u8(vreinterpretq_u16_s16(vminus_zero_point), vx));
83
84 const int32x4_t vwx_lo = vmovl_s16(vget_low_s16(vhx));
85 const int32x4_t vwx_hi = vmovl_s16(vget_high_s16(vhx));
86
87 float32x4_t vy = vcvtq_f32_s32(vwx_lo);
88 vy = vmulq_f32(vy, vscale);
89
90 if (n & (4 * sizeof(uint8_t))) {
91 vst1q_f32(y, vy); y += 4;
92 vy = vcvtq_f32_s32(vwx_hi);
93 vy = vmulq_f32(vy, vscale);
94 }
95 float32x2_t vy_lo = vget_low_f32(vy);
96 if (n & (2 * sizeof(uint8_t))) {
97 vst1_f32(y, vy_lo); y += 2;
98 vy_lo = vget_high_f32(vy);
99 }
100 if (n & (1 * sizeof(uint8_t))) {
101 vst1_lane_f32(y, vy_lo, 0);
102 }
103 }
104 }
105