1 // Auto-generated file. Do not edit!
2 // Template: src/qs8-vmul/scalar.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/math.h>
13 #include <xnnpack/vmul.h>
14
15
xnn_qs8_vmul_minmax_fp32_ukernel__scalar_x4(size_t n,const int8_t * input_a,const int8_t * input_b,int8_t * output,const union xnn_qs8_mul_minmax_params params[restrict XNN_MIN_ELEMENTS (1)])16 void xnn_qs8_vmul_minmax_fp32_ukernel__scalar_x4(
17 size_t n,
18 const int8_t* input_a,
19 const int8_t* input_b,
20 int8_t* output,
21 const union xnn_qs8_mul_minmax_params params[restrict XNN_MIN_ELEMENTS(1)])
22 {
23 const int32_t va_zero_point = params->fp32_scalar.a_zero_point;
24 const int32_t vb_zero_point = params->fp32_scalar.b_zero_point;
25 const float vscale = params->fp32_scalar.scale;
26 const float voutput_min_less_zero_point = params->fp32_scalar.output_min_less_zero_point;
27 const float voutput_max_less_zero_point = params->fp32_scalar.output_max_less_zero_point;
28 const float vmagic_bias = params->fp32_scalar.magic_bias;
29 const int32_t vmagic_bias_less_output_zero_point = params->fp32_scalar.magic_bias_less_output_zero_point;
30
31 for (; n >= 4 * sizeof(int8_t); n -= 4 * sizeof(int8_t)) {
32 const int32_t va0 = input_a[0] - va_zero_point;
33 const int32_t va1 = input_a[1] - va_zero_point;
34 const int32_t va2 = input_a[2] - va_zero_point;
35 const int32_t va3 = input_a[3] - va_zero_point;
36 input_a += 4;
37
38 const int32_t vb0 = input_b[0] - vb_zero_point;
39 const int32_t vb1 = input_b[1] - vb_zero_point;
40 const int32_t vb2 = input_b[2] - vb_zero_point;
41 const int32_t vb3 = input_b[3] - vb_zero_point;
42 input_b += 4;
43
44 const int32_t vacc0 = va0 * vb0;
45 const int32_t vacc1 = va1 * vb1;
46 const int32_t vacc2 = va2 * vb2;
47 const int32_t vacc3 = va3 * vb3;
48
49 float vfpacc0 = (float) vacc0 * vscale;
50 float vfpacc1 = (float) vacc1 * vscale;
51 float vfpacc2 = (float) vacc2 * vscale;
52 float vfpacc3 = (float) vacc3 * vscale;
53
54 vfpacc0 = math_max_f32(vfpacc0, voutput_min_less_zero_point);
55 vfpacc1 = math_max_f32(vfpacc1, voutput_min_less_zero_point);
56 vfpacc2 = math_max_f32(vfpacc2, voutput_min_less_zero_point);
57 vfpacc3 = math_max_f32(vfpacc3, voutput_min_less_zero_point);
58
59 vfpacc0 = math_min_f32(vfpacc0, voutput_max_less_zero_point);
60 vfpacc1 = math_min_f32(vfpacc1, voutput_max_less_zero_point);
61 vfpacc2 = math_min_f32(vfpacc2, voutput_max_less_zero_point);
62 vfpacc3 = math_min_f32(vfpacc3, voutput_max_less_zero_point);
63
64 vfpacc0 += vmagic_bias;
65 vfpacc1 += vmagic_bias;
66 vfpacc2 += vmagic_bias;
67 vfpacc3 += vmagic_bias;
68
69 const int32_t vout0 = (int32_t) float_as_uint32(vfpacc0) - vmagic_bias_less_output_zero_point;
70 const int32_t vout1 = (int32_t) float_as_uint32(vfpacc1) - vmagic_bias_less_output_zero_point;
71 const int32_t vout2 = (int32_t) float_as_uint32(vfpacc2) - vmagic_bias_less_output_zero_point;
72 const int32_t vout3 = (int32_t) float_as_uint32(vfpacc3) - vmagic_bias_less_output_zero_point;
73
74 output[0] = (int8_t) vout0;
75 output[1] = (int8_t) vout1;
76 output[2] = (int8_t) vout2;
77 output[3] = (int8_t) vout3;
78 output += 4;
79 }
80 if XNN_UNLIKELY(n != 0) {
81 do {
82 const int32_t va = (int32_t) *input_a++ - va_zero_point;
83 const int32_t vb = (int32_t) *input_b++ - vb_zero_point;
84 const int32_t vacc = va * vb;
85
86 float vfpacc = (float) vacc * vscale;
87 vfpacc = math_max_f32(vfpacc, voutput_min_less_zero_point);
88 vfpacc = math_min_f32(vfpacc, voutput_max_less_zero_point);
89 vfpacc += vmagic_bias;
90 const int32_t vout = (int32_t) float_as_uint32(vfpacc) - vmagic_bias_less_output_zero_point;
91 *output++ = (int8_t) vout;
92
93 n -= sizeof(int8_t);
94 } while (n != 0);
95 }
96 }
97