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__wasm_fmagic_x3(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__wasm_fmagic_x3(
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 >= 3 * sizeof(float); n -= 3 * sizeof(float)) {
37 float vx0 = x[0];
38 float vx1 = x[1];
39 float vx2 = x[2];
40 x += 3;
41
42 vx0 *= vscale;
43 vx1 *= vscale;
44 vx2 *= vscale;
45
46 vx0 = __builtin_wasm_max_f32(vx0, voutput_min_less_zero_point);
47 vx1 = __builtin_wasm_max_f32(vx1, voutput_min_less_zero_point);
48 vx2 = __builtin_wasm_max_f32(vx2, voutput_min_less_zero_point);
49
50 vx0 = __builtin_wasm_min_f32(vx0, voutput_max_less_zero_point);
51 vx1 = __builtin_wasm_min_f32(vx1, voutput_max_less_zero_point);
52 vx2 = __builtin_wasm_min_f32(vx2, voutput_max_less_zero_point);
53
54 vx0 += vmagic_bias;
55 vx1 += vmagic_bias;
56 vx2 += vmagic_bias;
57
58 int32_t vy0 = (int32_t) fp32_to_bits(vx0);
59 int32_t vy1 = (int32_t) fp32_to_bits(vx1);
60 int32_t vy2 = (int32_t) fp32_to_bits(vx2);
61
62 vy0 -= vmagic_bias_less_zero_point;
63 vy1 -= vmagic_bias_less_zero_point;
64 vy2 -= vmagic_bias_less_zero_point;
65
66 y[0] = (uint8_t) vy0;
67 y[1] = (uint8_t) vy1;
68 y[2] = (uint8_t) vy2;
69 y += 3;
70 }
71 if XNN_UNLIKELY(n != 0) {
72 do {
73 float vx = *x++;
74 vx *= vscale;
75 vx = __builtin_wasm_max_f32(vx, voutput_min_less_zero_point);
76 vx = __builtin_wasm_min_f32(vx, voutput_max_less_zero_point);
77 vx += vmagic_bias;
78
79 int32_t vy = (int32_t) fp32_to_bits(vx);
80 vy -= vmagic_bias_less_zero_point;
81
82 *y++ = (uint8_t) vy;
83
84 n -= sizeof(float);
85 } while (n != 0);
86 }
87 }
88