1 // Auto-generated file. Do not edit!
2 // Template: src/qu8-gemm/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/gemm.h>
15 #include <xnnpack/math.h>
16
17
xnn_qu8_gemm_minmax_rndnu_ukernel_2x8c4__neondot(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_rndnu_ukernel_2x8c4__neondot(
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)]) XNN_OOB_READS
29 {
30 assert(mr != 0);
31 assert(mr <= 2);
32 assert(nc != 0);
33 assert(kc != 0);
34 assert(kc % sizeof(uint8_t) == 0);
35 assert(a != NULL);
36 assert(w != NULL);
37 assert(c != NULL);
38
39 kc = round_up_po2(kc, 4 * sizeof(uint8_t));
40 const uint8_t* a0 = a;
41 uint8_t* c0 = c;
42 const uint8_t* a1 = (const uint8_t*) ((uintptr_t) a0 + a_stride);
43 uint8_t* c1 = (uint8_t*) ((uintptr_t) c0 + cm_stride);
44 if XNN_UNPREDICTABLE(mr != 2) {
45 a1 = a0;
46 c1 = c0;
47 }
48
49 const uint8x8_t va_zero_point = vld1_dup_u8(¶ms->rndnu_neon.kernel_zero_point[0]);
50
51 // Loop over groups of 8 columns.
52 do {
53 // Initialize accumulators with bias. 8 bias values are loaded from the
54 // weight matrix, at the start of the group of 8 columns.
55 uint32x4_t vpacc0x0123 = vld1q_u32(w); w = (const void*) ((const uint32_t*) w + 4);
56 uint32x4_t vpacc0x4567 = vld1q_u32(w); w = (const void*) ((const uint32_t*) w + 4);
57 uint32x4_t vpacc1x0123 = vpacc0x0123;
58 uint32x4_t vpacc1x4567 = vpacc0x4567;
59 uint32x2_t vnacc0 = vmov_n_u32(0);
60 uint32x2_t vnacc1 = vmov_n_u32(0);
61
62 // Inner accumulation loop along the 8 columns.
63 size_t k = kc;
64 // 2x partial unrolled loop to load 8 bytes at a time.
65 while (k >= 8 * sizeof(uint8_t)) {
66 // Load a 2x8 block of activations.
67 const uint8x8_t va0x01234567 = vld1_u8(a0); a0 += 8;
68 const uint8x8_t va1x01234567 = vld1_u8(a1); a1 += 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: 2x8 * 8x8 --> 2x8.
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 vnacc1 = vdot_u32(vnacc1, va_zero_point, va1x01234567);
83 vpacc1x0123 = vdotq_lane_u32(vpacc1x0123, vb0123x0123, va1x01234567, 0);
84 vpacc1x4567 = vdotq_lane_u32(vpacc1x4567, vb0123x4567, va1x01234567, 0);
85 vpacc1x0123 = vdotq_lane_u32(vpacc1x0123, vb4567x0123, va1x01234567, 1);
86 vpacc1x4567 = vdotq_lane_u32(vpacc1x4567, vb4567x4567, va1x01234567, 1);
87
88 k -= 8 * sizeof(uint8_t);
89 }
90 // Handle up to 4 final positions of `k`
91 if XNN_UNLIKELY(k != 0) {
92 // Load a 2x4 block of activations.
93 const uint8x8_t va0x01234567 = vreinterpret_u8_u32(vld1_lane_u32((const void*) a0, vmov_n_u32(0), 0)); a0 += 4;
94 const uint8x8_t va1x01234567 = vreinterpret_u8_u32(vld1_lane_u32((const void*) a1, vmov_n_u32(0), 0)); a1 += 4;
95
96 // Load a 4x8 block of weights.
97 const uint8x16_t vb0123x0123 = vld1q_u8(w); w = (const void*) ((const uint8_t*) w + 16);
98 const uint8x16_t vb0123x4567 = vld1q_u8(w); w = (const void*) ((const uint8_t*) w + 16);
99
100 // Multiply-accumulate: 2x4 * 4x8 --> 2x8.
101 vnacc0 = vdot_u32(vnacc0, va_zero_point, va0x01234567);
102 vpacc0x0123 = vdotq_lane_u32(vpacc0x0123, vb0123x0123, va0x01234567, 0);
103 vpacc0x4567 = vdotq_lane_u32(vpacc0x4567, vb0123x4567, va0x01234567, 0);
104 vnacc1 = vdot_u32(vnacc1, va_zero_point, va1x01234567);
105 vpacc1x0123 = vdotq_lane_u32(vpacc1x0123, vb0123x0123, va1x01234567, 0);
106 vpacc1x4567 = vdotq_lane_u32(vpacc1x4567, vb0123x4567, va1x01234567, 0);
107 }
108
109 // Subtract zero point from accumulators.
110 vnacc0 = vpadd_u32(vnacc0, vnacc0);
111 const uint32x4_t vnacc0x0123 = vcombine_u32(vnacc0, vnacc0);
112 int32x4_t vacc0x0123 = vreinterpretq_s32_u32(vsubq_u32(vpacc0x0123, vnacc0x0123));
113 int32x4_t vacc0x4567 = vreinterpretq_s32_u32(vsubq_u32(vpacc0x4567, vnacc0x0123));
114 vnacc1 = vpadd_u32(vnacc1, vnacc1);
115 const uint32x4_t vnacc1x0123 = vcombine_u32(vnacc1, vnacc1);
116 int32x4_t vacc1x0123 = vreinterpretq_s32_u32(vsubq_u32(vpacc1x0123, vnacc1x0123));
117 int32x4_t vacc1x4567 = vreinterpretq_s32_u32(vsubq_u32(vpacc1x4567, vnacc1x0123));
118
119 const int32x4_t vright_pre_shift = vld1q_dup_s32(¶ms->rndnu_neon.right_pre_shift);
120 const int32x4_t vmultiplier = vld1q_dup_s32(¶ms->rndnu_neon.multiplier);
121 const int32x4_t vright_post_shift = vld1q_dup_s32(¶ms->rndnu_neon.right_post_shift);
122
123 vacc0x0123 = vshlq_s32(vacc0x0123, vright_pre_shift);
124 vacc0x4567 = vshlq_s32(vacc0x4567, vright_pre_shift);
125 vacc1x0123 = vshlq_s32(vacc1x0123, vright_pre_shift);
126 vacc1x4567 = vshlq_s32(vacc1x4567, vright_pre_shift);
127
128 vacc0x0123 = vqdmulhq_s32(vacc0x0123, vmultiplier);
129 vacc0x4567 = vqdmulhq_s32(vacc0x4567, vmultiplier);
130 vacc1x0123 = vqdmulhq_s32(vacc1x0123, vmultiplier);
131 vacc1x4567 = vqdmulhq_s32(vacc1x4567, vmultiplier);
132
133 vacc0x0123 = vrshlq_s32(vacc0x0123, vright_post_shift);
134 vacc0x4567 = vrshlq_s32(vacc0x4567, vright_post_shift);
135 vacc1x0123 = vrshlq_s32(vacc1x0123, vright_post_shift);
136 vacc1x4567 = vrshlq_s32(vacc1x4567, vright_post_shift);
137
138 const int16x8_t voutput_zero_point = vld1q_dup_s16(¶ms->rndnu_neon.output_zero_point);
139 #if XNN_ARCH_ARM64
140 const int16x8_t vacc0x01234567 = vqaddq_s16(vqmovn_high_s32(vqmovn_s32(vacc0x0123), vacc0x4567), voutput_zero_point);
141 const int16x8_t vacc1x01234567 = vqaddq_s16(vqmovn_high_s32(vqmovn_s32(vacc1x0123), vacc1x4567), voutput_zero_point);
142
143 uint8x16_t vout0x01234567_1x01234567 = vqmovun_high_s16(vqmovun_s16(vacc0x01234567), vacc1x01234567);
144 #else
145 const int16x8_t vacc0x01234567 = vqaddq_s16(vcombine_s16(vqmovn_s32(vacc0x0123), vqmovn_s32(vacc0x4567)), voutput_zero_point);
146 const int16x8_t vacc1x01234567 = vqaddq_s16(vcombine_s16(vqmovn_s32(vacc1x0123), vqmovn_s32(vacc1x4567)), voutput_zero_point);
147
148 uint8x16_t vout0x01234567_1x01234567 = vcombine_u8(vqmovun_s16(vacc0x01234567), vqmovun_s16(vacc1x01234567));
149 #endif
150 const uint8x16_t voutput_min = vld1q_dup_u8(¶ms->rndnu_neon.output_min);
151 const uint8x16_t voutput_max = vld1q_dup_u8(¶ms->rndnu_neon.output_max);
152
153 vout0x01234567_1x01234567 = vmaxq_u8(vout0x01234567_1x01234567, voutput_min);
154
155 vout0x01234567_1x01234567 = vminq_u8(vout0x01234567_1x01234567, voutput_max);
156
157 if (nc >= 8) {
158 vst1_u8(c0 + 0, vget_low_u8(vout0x01234567_1x01234567));
159 vst1_u8(c1 + 0, vget_high_u8(vout0x01234567_1x01234567));
160
161 c0 = (uint8_t*) ((uintptr_t) c0 + cn_stride);
162 c1 = (uint8_t*) ((uintptr_t) c1 + cn_stride);
163
164 a0 = (const uint8_t*) ((uintptr_t) a0 - kc);
165 a1 = (const uint8_t*) ((uintptr_t) a1 - kc);
166
167 nc -= 8;
168 } else {
169 if (nc & 4) {
170 vst1q_lane_u32((void*) c0, vreinterpretq_u32_u8(vout0x01234567_1x01234567), 0); c0 += 4;
171 vst1q_lane_u32((void*) c1, vreinterpretq_u32_u8(vout0x01234567_1x01234567), 2); c1 += 4;
172 vout0x01234567_1x01234567 = vextq_u8(vout0x01234567_1x01234567, vout0x01234567_1x01234567, 4);
173 }
174 if (nc & 2) {
175 vst1q_lane_u16((void*) c0, vreinterpretq_u16_u8(vout0x01234567_1x01234567), 0); c0 += 2;
176 vst1q_lane_u16((void*) c1, vreinterpretq_u16_u8(vout0x01234567_1x01234567), 4); c1 += 2;
177 vout0x01234567_1x01234567 = vextq_u8(vout0x01234567_1x01234567, vout0x01234567_1x01234567, 2);
178 }
179 if (nc & 1) {
180 vst1q_lane_u8(c0, vout0x01234567_1x01234567, 0);
181 vst1q_lane_u8(c1, vout0x01234567_1x01234567, 8);
182 }
183
184 nc = 0;
185 }
186 } while (nc != 0);
187 }
188