1 // Auto-generated file. Do not edit!
2 // Template: src/qu8-igemm/c4-neondot.c.in
3 // Generator: tools/xngen
4 //
5 // Copyright 2020 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 <arm_neon.h>
13
14 #include <xnnpack/igemm.h>
15 #include <xnnpack/math.h>
16
17
xnn_qu8_igemm_minmax_rndnu_ukernel_1x8c4__neondot(size_t mr,size_t nc,size_t kc,size_t ks,const uint8_t ** restrict a,const void * restrict w,uint8_t * restrict c,size_t cm_stride,size_t cn_stride,size_t a_offset,const uint8_t * zero,const union xnn_qu8_conv_minmax_params params[restrict XNN_MIN_ELEMENTS (1)])18 void xnn_qu8_igemm_minmax_rndnu_ukernel_1x8c4__neondot(
19 size_t mr,
20 size_t nc,
21 size_t kc,
22 size_t ks,
23 const uint8_t** restrict a,
24 const void* restrict w,
25 uint8_t* restrict c,
26 size_t cm_stride,
27 size_t cn_stride,
28 size_t a_offset,
29 const uint8_t* zero,
30 const union xnn_qu8_conv_minmax_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
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_offset % sizeof(uint8_t) == 0);
39 assert(a != NULL);
40 assert(w != NULL);
41 assert(c != NULL);
42
43 kc = round_up_po2(kc, 4 * sizeof(uint8_t));
44 uint8_t* c0 = c;
45
46 const uint8x8_t va_zero_point = vld1_dup_u8(¶ms->rndnu_neon.kernel_zero_point[0]);
47
48 do {
49 // Initialize accumulators with bias. 8 bias values are loaded from the
50 // weight matrix, at the start of the group of 8 columns.
51 uint32x4_t vpacc0x0123 = vld1q_u32(w); w = (const void*) ((const uint32_t*) w + 4);
52 uint32x4_t vpacc0x4567 = vld1q_u32(w); w = (const void*) ((const uint32_t*) w + 4);
53 uint32x2_t vnacc0 = vmov_n_u32(0);
54
55 size_t p = ks;
56 do {
57 const uint8_t* restrict a0 = a[0];
58 if XNN_UNPREDICTABLE(a0 != zero) {
59 a0 = (const uint8_t*) ((uintptr_t) a0 + a_offset);
60 }
61 a += 1;
62
63 // Inner accumulation loop along the 8 columns.
64 size_t k = kc;
65 // 2x partial unrolled loop to load 8 bytes at a time.
66 while (k >= 8 * sizeof(uint8_t)) {
67 // Load a 1x8 block of activations.
68 const uint8x8_t va0x01234567 = vld1_u8(a0); a0 += 8;
69
70 // Load a 8x8 block of weights.
71 const uint8x16_t vb0123x0123 = vld1q_u8(w); w = (const void*) ((const uint8_t*) w + 16);
72 const uint8x16_t vb0123x4567 = vld1q_u8(w); w = (const void*) ((const uint8_t*) w + 16);
73 const uint8x16_t vb4567x0123 = vld1q_u8(w); w = (const void*) ((const uint8_t*) w + 16);
74 const uint8x16_t vb4567x4567 = vld1q_u8(w); w = (const void*) ((const uint8_t*) w + 16);
75
76 // Multiply-accumulate: 1x8 * 8x8 --> 1x8.
77 vnacc0 = vdot_u32(vnacc0, va_zero_point, va0x01234567);
78 vpacc0x0123 = vdotq_lane_u32(vpacc0x0123, vb0123x0123, va0x01234567, 0);
79 vpacc0x4567 = vdotq_lane_u32(vpacc0x4567, vb0123x4567, va0x01234567, 0);
80 vpacc0x0123 = vdotq_lane_u32(vpacc0x0123, vb4567x0123, va0x01234567, 1);
81 vpacc0x4567 = vdotq_lane_u32(vpacc0x4567, vb4567x4567, va0x01234567, 1);
82
83 k -= 8 * sizeof(uint8_t);
84 }
85 // Handle up to 4 final positions of `k`
86 if XNN_UNLIKELY(k != 0) {
87 // Load a 1x4 block of activations.
88 const uint8x8_t va0x01234567 = vreinterpret_u8_u32(vld1_lane_u32((const void*) a0, vmov_n_u32(0), 0)); a0 += 4;
89
90 // Load a 4x8 block of weights.
91 const uint8x16_t vb0123x0123 = vld1q_u8(w); w = (const void*) ((const uint8_t*) w + 16);
92 const uint8x16_t vb0123x4567 = vld1q_u8(w); w = (const void*) ((const uint8_t*) w + 16);
93
94 // Multiply-accumulate: 1x4 * 4x8 --> 1x8.
95 vnacc0 = vdot_u32(vnacc0, va_zero_point, va0x01234567);
96 vpacc0x0123 = vdotq_lane_u32(vpacc0x0123, vb0123x0123, va0x01234567, 0);
97 vpacc0x4567 = vdotq_lane_u32(vpacc0x4567, vb0123x4567, va0x01234567, 0);
98 }
99 p -= 1 * sizeof(void*);
100 } while (p != 0);
101
102 // Subtract zero point from accumulators.
103 vnacc0 = vpadd_u32(vnacc0, vnacc0);
104 const uint32x4_t vnacc0x0123 = vcombine_u32(vnacc0, vnacc0);
105 int32x4_t vacc0x0123 = vreinterpretq_s32_u32(vsubq_u32(vpacc0x0123, vnacc0x0123));
106 int32x4_t vacc0x4567 = vreinterpretq_s32_u32(vsubq_u32(vpacc0x4567, vnacc0x0123));
107
108 const int32x4_t vright_pre_shift = vld1q_dup_s32(¶ms->rndnu_neon.right_pre_shift);
109 const int32x4_t vmultiplier = vld1q_dup_s32(¶ms->rndnu_neon.multiplier);
110 const int32x4_t vright_post_shift = vld1q_dup_s32(¶ms->rndnu_neon.right_post_shift);
111
112 vacc0x0123 = vshlq_s32(vacc0x0123, vright_pre_shift);
113 vacc0x4567 = vshlq_s32(vacc0x4567, vright_pre_shift);
114
115 vacc0x0123 = vqdmulhq_s32(vacc0x0123, vmultiplier);
116 vacc0x4567 = vqdmulhq_s32(vacc0x4567, vmultiplier);
117
118 vacc0x0123 = vrshlq_s32(vacc0x0123, vright_post_shift);
119 vacc0x4567 = vrshlq_s32(vacc0x4567, vright_post_shift);
120
121 const int16x8_t voutput_zero_point = vld1q_dup_s16(¶ms->rndnu_neon.output_zero_point);
122 #if XNN_ARCH_ARM64
123 const int16x8_t vacc0x01234567 = vqaddq_s16(vqmovn_high_s32(vqmovn_s32(vacc0x0123), vacc0x4567), voutput_zero_point);
124
125 uint8x8_t vout0x01234567 = vqmovun_s16(vacc0x01234567);
126 #else
127 const int16x8_t vacc0x01234567 = vqaddq_s16(vcombine_s16(vqmovn_s32(vacc0x0123), vqmovn_s32(vacc0x4567)), voutput_zero_point);
128
129 uint8x8_t vout0x01234567 = vqmovun_s16(vacc0x01234567);
130 #endif
131 const uint8x8_t voutput_min = vld1_dup_u8(¶ms->rndnu_neon.output_min);
132 const uint8x8_t voutput_max = vld1_dup_u8(¶ms->rndnu_neon.output_max);
133
134 vout0x01234567 = vmax_u8(vout0x01234567, voutput_min);
135
136 vout0x01234567 = vmin_u8(vout0x01234567, voutput_max);
137
138 if (nc >= 8) {
139 vst1_u8(c0 + 0, vout0x01234567);
140
141 c0 = (uint8_t*) ((uintptr_t) c0 + cn_stride);
142
143 a = (const uint8_t**restrict) ((uintptr_t) a - ks);
144
145 nc -= 8;
146 } else {
147 if (nc & 4) {
148 vst1_lane_u32((void*) c0, vreinterpret_u32_u8(vout0x01234567), 0); c0 += 4;
149 vout0x01234567 = vext_u8(vout0x01234567, vout0x01234567, 4);
150 }
151 if (nc & 2) {
152 vst1_lane_u16((void*) c0, vreinterpret_u16_u8(vout0x01234567), 0); c0 += 2;
153 vout0x01234567 = vext_u8(vout0x01234567, vout0x01234567, 2);
154 }
155 if (nc & 1) {
156 vst1_lane_u8(c0, vout0x01234567, 0);
157 }
158
159 nc = 0;
160 }
161 } while (nc != 0);
162 }
163