1 // Auto-generated file. Do not edit!
2 // Template: src/qs8-igemm/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/gemm.h>
14 #include <xnnpack/unaligned.h>
15
16
xnn_qs8_igemm_minmax_fp32_ukernel_2x2__scalar_imagic(size_t mr,size_t nc,size_t kc,size_t ks,const int8_t ** restrict a,const void * restrict w,int8_t * restrict c,size_t cm_stride,size_t cn_stride,size_t a_offset,const int8_t * zero,const union xnn_qs8_conv_minmax_params params[restrict XNN_MIN_ELEMENTS (1)])17 void xnn_qs8_igemm_minmax_fp32_ukernel_2x2__scalar_imagic(
18 size_t mr,
19 size_t nc,
20 size_t kc,
21 size_t ks,
22 const int8_t**restrict a,
23 const void*restrict w,
24 int8_t*restrict c,
25 size_t cm_stride,
26 size_t cn_stride,
27 size_t a_offset,
28 const int8_t* zero,
29 const union xnn_qs8_conv_minmax_params params[restrict XNN_MIN_ELEMENTS(1)])
30 {
31 assert(mr != 0);
32 assert(mr <= 2);
33 assert(nc != 0);
34 assert(kc != 0);
35 assert(ks != 0);
36 assert(ks % (2 * sizeof(void*)) == 0);
37 assert(a != NULL);
38 assert(w != NULL);
39 assert(c != NULL);
40
41 int8_t* c0 = c;
42 int8_t* c1 = (int8_t*) ((uintptr_t) c0 + cm_stride);
43 if XNN_UNPREDICTABLE(mr != 2) {
44 c1 = c0;
45 }
46
47 do {
48 int32_t vacc0x0 = unaligned_indexed_load_s32(w, 0);
49 int32_t vacc0x1 = unaligned_indexed_load_s32(w, 1);
50 int32_t vacc1x0 = vacc0x0;
51 int32_t vacc1x1 = vacc0x1;
52 w = (const void*) ((const int32_t*) w + 2);
53
54 size_t p = ks;
55 do {
56 const int8_t* restrict a0 = a[0];
57 assert(a0 != NULL);
58 if XNN_UNPREDICTABLE(a0 != zero) {
59 a0 = (const int8_t*) ((uintptr_t) a0 + a_offset);
60 }
61 const int8_t* restrict a1 = a[1];
62 assert(a1 != NULL);
63 if XNN_UNPREDICTABLE(a1 != zero) {
64 a1 = (const int8_t*) ((uintptr_t) a1 + a_offset);
65 }
66 a += 2;
67
68 size_t k = kc;
69 do {
70 const int32_t va0 = (int32_t) *a0++;
71 const int32_t va1 = (int32_t) *a1++;
72
73 const int32_t vb0 = (int32_t) ((const int8_t*) w)[0];
74 const int32_t vb1 = (int32_t) ((const int8_t*) w)[1];
75 w = (const void*) ((const int8_t*) w + 2);
76
77 vacc0x0 += va0 * vb0;
78 vacc0x1 += va0 * vb1;
79 vacc1x0 += va1 * vb0;
80 vacc1x1 += va1 * vb1;
81
82 k -= sizeof(int8_t);
83 } while (k != 0);
84 p -= 2 * sizeof(void*);
85 } while (p != 0);
86
87 float vfpacc0x0 = (float) vacc0x0;
88 float vfpacc0x1 = (float) vacc0x1;
89 float vfpacc1x0 = (float) vacc1x0;
90 float vfpacc1x1 = (float) vacc1x1;
91
92 const float vscale = params->fp32_scalar_imagic.scale;
93 vfpacc0x0 *= vscale;
94 vfpacc0x1 *= vscale;
95 vfpacc1x0 *= vscale;
96 vfpacc1x1 *= vscale;
97
98 const float vmagic_bias = params->fp32_scalar_imagic.magic_bias;
99 vfpacc0x0 += vmagic_bias;
100 vfpacc0x1 += vmagic_bias;
101 vfpacc1x0 += vmagic_bias;
102 vfpacc1x1 += vmagic_bias;
103
104 int32_t vout0x0 = (int32_t) float_as_uint32(vfpacc0x0);
105 int32_t vout0x1 = (int32_t) float_as_uint32(vfpacc0x1);
106 int32_t vout1x0 = (int32_t) float_as_uint32(vfpacc1x0);
107 int32_t vout1x1 = (int32_t) float_as_uint32(vfpacc1x1);
108
109 const int32_t vmagic_min = params->fp32_scalar_imagic.magic_min;
110 vout0x0 = math_max_s32(vout0x0, vmagic_min);
111 vout0x1 = math_max_s32(vout0x1, vmagic_min);
112 vout1x0 = math_max_s32(vout1x0, vmagic_min);
113 vout1x1 = math_max_s32(vout1x1, vmagic_min);
114
115 const int32_t vmagic_max = params->fp32_scalar_imagic.magic_max;
116 vout0x0 = math_min_s32(vout0x0, vmagic_max);
117 vout0x1 = math_min_s32(vout0x1, vmagic_max);
118 vout1x0 = math_min_s32(vout1x0, vmagic_max);
119 vout1x1 = math_min_s32(vout1x1, vmagic_max);
120
121 const int32_t vmagic_bias_less_zero_point = params->fp32_scalar_imagic.magic_bias_less_zero_point;
122 vout0x0 -= vmagic_bias_less_zero_point;
123 vout0x1 -= vmagic_bias_less_zero_point;
124 vout1x0 -= vmagic_bias_less_zero_point;
125 vout1x1 -= vmagic_bias_less_zero_point;
126
127 if XNN_LIKELY(nc >= 2) {
128 c1[0] = (int8_t) vout1x0;
129 c1[1] = (int8_t) vout1x1;
130 c0[0] = (int8_t) vout0x0;
131 c0[1] = (int8_t) vout0x1;
132
133 c1 = (int8_t*) ((uintptr_t) c1 + cn_stride);
134 c0 = (int8_t*) ((uintptr_t) c0 + cn_stride);
135
136 a = (const int8_t**restrict) ((uintptr_t) a - ks);
137 nc -= 2;
138 } else {
139 if (nc & 1) {
140 c1[0] = (int8_t) vout1x0;
141 c0[0] = (int8_t) vout0x0;
142 }
143
144 nc = 0;
145 }
146 } while (nc != 0);
147 }
148