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1 // Auto-generated file. Do not edit!
2 //   Template: src/qs8-gemm/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 <fp16.h>
13 
14 #include <xnnpack/math.h>
15 #include <xnnpack/gemm.h>
16 
17 
xnn_qu8_gemm_minmax_fp32_ukernel_2x2__scalar_imagic(size_t mr,size_t nc,size_t kc,const uint8_t * restrict a,size_t a_stride,const void * restrict w,uint8_t * restrict c,size_t cm_stride,size_t cn_stride,const union xnn_qu8_conv_minmax_params params[restrict XNN_MIN_ELEMENTS (1)])18 void xnn_qu8_gemm_minmax_fp32_ukernel_2x2__scalar_imagic(
19     size_t mr,
20     size_t nc,
21     size_t kc,
22     const uint8_t* restrict a,
23     size_t a_stride,
24     const void* restrict w,
25     uint8_t* restrict c,
26     size_t cm_stride,
27     size_t cn_stride,
28     const union xnn_qu8_conv_minmax_params params[restrict XNN_MIN_ELEMENTS(1)])
29 {
30   assert(mr != 0);
31   assert(mr <= 2);
32   assert(nc != 0);
33   assert(kc != 0);
34 
35   const uint8_t* a0 = a;
36   uint8_t* c0 = c;
37   const uint8_t* a1 = (const uint8_t*) ((uintptr_t) a0 + a_stride);
38   uint8_t* c1 = (uint8_t*) ((uintptr_t) c0 + cm_stride);
39   if XNN_UNPREDICTABLE(mr != 2) {
40     a1 = a0;
41     c1 = c0;
42   }
43 
44   const int32_t vb_zero_point = params->fp32_scalar_imagic.kernel_zero_point;
45   do {
46     int32_t vacc0x0 = ((const int32_t*) w)[0];
47     int32_t vacc0x1 = ((const int32_t*) w)[1];
48     int32_t vacc1x0 = vacc0x0;
49     int32_t vacc1x1 = vacc0x1;
50     w = (const void*) ((const int32_t*) w + 2);
51 
52     size_t k = kc;
53     do {
54       const int32_t va0 = (int32_t) (uint32_t) *a0++;
55       const int32_t va1 = (int32_t) (uint32_t) *a1++;
56 
57       const int32_t vb0 = (int32_t) (uint32_t) ((const uint8_t*) w)[0] - vb_zero_point;
58       const int32_t vb1 = (int32_t) (uint32_t) ((const uint8_t*) w)[1] - vb_zero_point;
59       w = (const void*) ((const uint8_t*) w + 2);
60 
61       vacc0x0 += va0 * vb0;
62       vacc0x1 += va0 * vb1;
63       vacc1x0 += va1 * vb0;
64       vacc1x1 += va1 * vb1;
65 
66       k -= sizeof(uint8_t);
67     } while (k != 0);
68 
69     float vfpacc0x0 = (float) vacc0x0;
70     float vfpacc0x1 = (float) vacc0x1;
71     float vfpacc1x0 = (float) vacc1x0;
72     float vfpacc1x1 = (float) vacc1x1;
73 
74     const float vscale = params->fp32_scalar_imagic.scale;
75     vfpacc0x0 *= vscale;
76     vfpacc0x1 *= vscale;
77     vfpacc1x0 *= vscale;
78     vfpacc1x1 *= vscale;
79 
80     const float vmagic_bias = params->fp32_scalar_imagic.magic_bias;
81     vfpacc0x0 += vmagic_bias;
82     vfpacc0x1 += vmagic_bias;
83     vfpacc1x0 += vmagic_bias;
84     vfpacc1x1 += vmagic_bias;
85 
86     int32_t vout0x0 = (int32_t) fp32_to_bits(vfpacc0x0);
87     int32_t vout0x1 = (int32_t) fp32_to_bits(vfpacc0x1);
88     int32_t vout1x0 = (int32_t) fp32_to_bits(vfpacc1x0);
89     int32_t vout1x1 = (int32_t) fp32_to_bits(vfpacc1x1);
90 
91     const int32_t vmagic_min = params->fp32_scalar_imagic.magic_min;
92     vout0x0 = math_max_s32(vout0x0, vmagic_min);
93     vout0x1 = math_max_s32(vout0x1, vmagic_min);
94     vout1x0 = math_max_s32(vout1x0, vmagic_min);
95     vout1x1 = math_max_s32(vout1x1, vmagic_min);
96 
97     const int32_t vmagic_max = params->fp32_scalar_imagic.magic_max;
98     vout0x0 = math_min_s32(vout0x0, vmagic_max);
99     vout0x1 = math_min_s32(vout0x1, vmagic_max);
100     vout1x0 = math_min_s32(vout1x0, vmagic_max);
101     vout1x1 = math_min_s32(vout1x1, vmagic_max);
102 
103     const int32_t vmagic_bias_less_zero_point = params->fp32_scalar_imagic.magic_bias_less_zero_point;
104     vout0x0 -= vmagic_bias_less_zero_point;
105     vout0x1 -= vmagic_bias_less_zero_point;
106     vout1x0 -= vmagic_bias_less_zero_point;
107     vout1x1 -= vmagic_bias_less_zero_point;
108 
109     if XNN_LIKELY(nc >= 2) {
110       c0[0] = (uint8_t) vout0x0;
111       c0[1] = (uint8_t) vout0x1;
112       c1[0] = (uint8_t) vout1x0;
113       c1[1] = (uint8_t) vout1x1;
114 
115       a0 = (const uint8_t*) ((uintptr_t) a0 - kc);
116       a1 = (const uint8_t*) ((uintptr_t) a1 - kc);
117 
118       c0 = (uint8_t*) ((uintptr_t) c0 + cn_stride);
119       c1 = (uint8_t*) ((uintptr_t) c1 + cn_stride);
120 
121       nc -= 2;
122     } else {
123       if (nc & 1) {
124         c0[0] = (uint8_t) vout0x0;
125         c1[0] = (uint8_t) vout1x0;
126       }
127 
128       nc = 0;
129     }
130   } while (nc != 0);
131 }
132