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 <fp16.h>
13
14 #include <xnnpack/math.h>
15 #include <xnnpack/gemm.h>
16
17
xnn_qc8_igemm_minmax_fp32_ukernel_1x2__scalar_fmagic(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_minmax_params params[restrict XNN_MIN_ELEMENTS (1)])18 void xnn_qc8_igemm_minmax_fp32_ukernel_1x2__scalar_fmagic(
19 size_t mr,
20 size_t nc,
21 size_t kc,
22 size_t ks,
23 const int8_t**restrict a,
24 const void*restrict w,
25 int8_t*restrict c,
26 size_t cm_stride,
27 size_t cn_stride,
28 size_t a_offset,
29 const int8_t* zero,
30 const union xnn_qs8_minmax_params params[restrict XNN_MIN_ELEMENTS(1)])
31 {
32 assert(mr != 0);
33 assert(mr <= 1);
34 assert(nc != 0);
35 assert(kc != 0);
36 assert(ks != 0);
37 assert(ks % (1 * sizeof(void*)) == 0);
38 assert(a != NULL);
39 assert(w != NULL);
40 assert(c != NULL);
41
42 int8_t* c0 = c;
43
44 do {
45 int32_t vacc0x0 = ((const int32_t*) w)[0];
46 int32_t vacc0x1 = ((const int32_t*) w)[1];
47 w = (const void*) ((const int32_t*) w + 2);
48
49 size_t p = ks;
50 do {
51 const int8_t* restrict a0 = a[0];
52 assert(a0 != NULL);
53 if XNN_UNPREDICTABLE(a0 != zero) {
54 a0 = (const int8_t*) ((uintptr_t) a0 + a_offset);
55 }
56 a += 1;
57
58 size_t k = kc;
59 do {
60 const int32_t va0 = (int32_t) *a0++;
61
62 const int32_t vb0 = (int32_t) ((const int8_t*) w)[0];
63 const int32_t vb1 = (int32_t) ((const int8_t*) w)[1];
64 w = (const void*) ((const int8_t*) w + 2);
65
66 vacc0x0 += va0 * vb0;
67 vacc0x1 += va0 * vb1;
68
69 k -= sizeof(int8_t);
70 } while (k != 0);
71 p -= 1 * sizeof(void*);
72 } while (p != 0);
73
74 float vfpacc0x0 = (float) vacc0x0;
75 float vfpacc0x1 = (float) vacc0x1;
76
77 typedef XNN_UNALIGNED float unaligned_float;
78 const float vscale0 = ((const unaligned_float*) w)[0];
79 vfpacc0x0 *= vscale0;
80 const float vscale1 = ((const unaligned_float*) w)[1];
81 vfpacc0x1 *= vscale1;
82 w = (const void*) ((const float*) w + 2);
83
84 const float voutput_min_less_zero_point = params->scalar_fmagic.output_min_less_zero_point;
85 vfpacc0x0 = math_max_f32(vfpacc0x0, voutput_min_less_zero_point);
86 vfpacc0x1 = math_max_f32(vfpacc0x1, voutput_min_less_zero_point);
87
88 const float voutput_max_less_zero_point = params->scalar_fmagic.output_max_less_zero_point;
89 vfpacc0x0 = math_min_f32(vfpacc0x0, voutput_max_less_zero_point);
90 vfpacc0x1 = math_min_f32(vfpacc0x1, voutput_max_less_zero_point);
91
92 const float vmagic_bias = params->scalar_fmagic.magic_bias;
93 vfpacc0x0 += vmagic_bias;
94 vfpacc0x1 += vmagic_bias;
95
96 const int32_t vmagic_bias_less_output_zero_point = params->scalar_fmagic.magic_bias_less_output_zero_point;
97 int32_t vout0x0 = (int32_t) fp32_to_bits(vfpacc0x0) - vmagic_bias_less_output_zero_point;
98 int32_t vout0x1 = (int32_t) fp32_to_bits(vfpacc0x1) - vmagic_bias_less_output_zero_point;
99
100 if XNN_LIKELY(nc >= 2) {
101 c0[0] = (int8_t) vout0x0;
102 c0[1] = (int8_t) vout0x1;
103
104 c0 = (int8_t*) ((uintptr_t) c0 + cn_stride);
105
106 a = (const int8_t**restrict) ((uintptr_t) a - ks);
107 nc -= 2;
108 } else {
109 if (nc & 1) {
110 c0[0] = (int8_t) vout0x0;
111 }
112
113 nc = 0;
114 }
115 } while (nc != 0);
116 }
117