1 // Auto-generated file. Do not edit!
2 // Template: src/f32-qs8-vcvt/scalar-fmagic.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 <xnnpack/common.h>
13 #include <xnnpack/math.h>
14 #include <xnnpack/vcvt.h>
15
16 #include <fp16.h>
17
18
xnn_f32_qu8_vcvt_ukernel__scalar_fmagic_x2(size_t n,const float * x,uint8_t * y,const union xnn_f32_qu8_cvt_params params[restrict XNN_MIN_ELEMENTS (1)])19 void xnn_f32_qu8_vcvt_ukernel__scalar_fmagic_x2(
20 size_t n,
21 const float* x,
22 uint8_t* y,
23 const union xnn_f32_qu8_cvt_params params[restrict XNN_MIN_ELEMENTS(1)])
24 {
25 assert(n != 0);
26 assert(n % sizeof(float) == 0);
27 assert(x != NULL);
28 assert(y != NULL);
29
30 const float vscale = params->scalar_fmagic.scale;
31 const float voutput_min_less_zero_point = params->scalar_fmagic.output_min_less_zero_point;
32 const float voutput_max_less_zero_point = params->scalar_fmagic.output_max_less_zero_point;
33 const float vmagic_bias = params->scalar_fmagic.magic_bias;
34 const int32_t vmagic_bias_less_zero_point = params->scalar_fmagic.magic_bias_less_zero_point;
35
36 for (; n >= 2 * sizeof(float); n -= 2 * sizeof(float)) {
37 float vx0 = x[0];
38 float vx1 = x[1];
39 x += 2;
40
41 vx0 *= vscale;
42 vx1 *= vscale;
43
44 vx0 = math_max_f32(vx0, voutput_min_less_zero_point);
45 vx1 = math_max_f32(vx1, voutput_min_less_zero_point);
46
47 vx0 = math_min_f32(vx0, voutput_max_less_zero_point);
48 vx1 = math_min_f32(vx1, voutput_max_less_zero_point);
49
50 vx0 += vmagic_bias;
51 vx1 += vmagic_bias;
52
53 int32_t vy0 = (int32_t) fp32_to_bits(vx0);
54 int32_t vy1 = (int32_t) fp32_to_bits(vx1);
55
56 vy0 -= vmagic_bias_less_zero_point;
57 vy1 -= vmagic_bias_less_zero_point;
58
59 y[0] = (uint8_t) vy0;
60 y[1] = (uint8_t) vy1;
61 y += 2;
62 }
63 if XNN_UNLIKELY(n != 0) {
64 float vx = *x;
65 vx *= vscale;
66 vx = math_max_f32(vx, voutput_min_less_zero_point);
67 vx = math_min_f32(vx, voutput_max_less_zero_point);
68 vx += vmagic_bias;
69
70 int32_t vy = (int32_t) fp32_to_bits(vx);
71 vy -= vmagic_bias_less_zero_point;
72
73 *y = (uint8_t) vy;
74 }
75 }
76