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