1 /*
2 * Copyright (c) 2017-2020 Arm Limited.
3 *
4 * SPDX-License-Identifier: MIT
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in all
14 * copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 */
24 #ifdef __aarch64__
25
26 #include <arm_neon.h>
27
28 #include "../../asmlib.hpp"
29
30 // Kernel implementation.
31 //
32 // Assume that "Apanel" points to a chunk of A blocks (each size 8xK) in read-order.
33 // Assume that "Bpanel" points to a chunk of B blocks (each size 12xK) in read-order.
34 // Assume that "Cpanel" points to a chunk of C output blocks (each size
35 // 12x8), the chunks being arranged in a row major fashion.
36 //
37 // Note that the intent of this is that either ablocks or bblocks will be 1
38 // - this construction allows the output loop to proceed in either order.
39
40 namespace arm_gemm {
41
a64_sgemm_asimd_8x12_x1(const float * Apanel,const float * Bpanel,float * Cpanel,int ablocks,int bblocks,int K)42 void a64_sgemm_asimd_8x12_x1(const float *Apanel, const float *Bpanel, float *Cpanel, int ablocks, int bblocks, int K) {
43 const float *a_ptr = Apanel;
44 float *c_ptr = Cpanel;
45
46 for (int yb=0; yb<ablocks; yb++) {
47 const float *a_ptr0 = a_ptr;
48 const float *b_ptr = Bpanel;
49
50 for (int xb=0; xb<bblocks; xb++) {
51 a_ptr = a_ptr0;
52 // Fix up for odd lengths - set a flag if K is odd, but make
53 // sure we round up the iteration count.
54 int oddk = (K & 1);
55 int k = ((K+1)/2) - 1;
56
57 register float32x4_t a0 asm("v0");
58 register float32x4_t a1 asm("v1");
59 register float32x4_t b0 asm("v2");
60 register float32x4_t b1 asm("v3");
61 register float32x4_t b2 asm("v4");
62
63 __asm __volatile (
64 // Initialize result registers, load initial operands, prime prefetches.
65 "movi v8.4s, #0x0\n"
66 "ldr %q[a0], [%[a_ptr]]\n"
67 "movi v9.4s, #0x0\n"
68 "ldr %q[b0], [%[b_ptr]]\n"
69 "movi v10.4s, #0x0\n"
70 "ldr %q[a1], [%[a_ptr], #16]\n"
71 "movi v11.4s, #0x0\n"
72 "ldr %q[b1], [%[b_ptr], #16]\n"
73 "movi v12.4s, #0x0\n"
74 ASM_PREFETCH("[%[b_ptr], #64]")
75 "movi v13.4s, #0x0\n"
76 ASM_PREFETCH("[%[a_ptr], #64]")
77 "movi v14.4s, #0x0\n"
78 ASM_PREFETCH("[%[b_ptr], #128]")
79 "movi v15.4s, #0x0\n"
80 ASM_PREFETCH("[%[a_ptr], #128]")
81 "movi v16.4s, #0x0\n"
82 ASM_PREFETCH("[%[b_ptr], #192]")
83 "movi v17.4s, #0x0\n"
84 ASM_PREFETCH("[%[b_ptr], #256]")
85 "movi v18.4s, #0x0\n"
86 ASM_PREFETCH("[%[a_ptr], #192]")
87 "movi v19.4s, #0x0\n"
88 ASM_PREFETCH("[%[b_ptr], #320]")
89 "movi v20.4s, #0x0\n"
90 ASM_PREFETCH("[%[a_ptr], #256]")
91 "movi v21.4s, #0x0\n"
92 ASM_PREFETCH("[%[b_ptr], #384]")
93 "movi v22.4s, #0x0\n"
94 "movi v23.4s, #0x0\n"
95 "movi v24.4s, #0x0\n"
96 "movi v25.4s, #0x0\n"
97 "movi v26.4s, #0x0\n"
98 "movi v27.4s, #0x0\n"
99 "movi v28.4s, #0x0\n"
100 "movi v29.4s, #0x0\n"
101 "movi v30.4s, #0x0\n"
102 "movi v31.4s, #0x0\n"
103
104 // Skip loop if we are doing zero iterations of it.
105 "cbz %w[k], 4f\n"
106
107 // Loop proper
108 "1:\n"
109 "fmla v8.4s , %[b0].4s, %[a0].s[0]\n"
110 "fmla v9.4s , %[b0].4s, %[a0].s[1]\n"
111 "ldr %q[b2], [%[b_ptr], #32]\n"
112 "fmla v10.4s, %[b0].4s, %[a0].s[2]\n"
113 "fmla v11.4s, %[b0].4s, %[a0].s[3]\n"
114 "fmla v12.4s, %[b0].4s, %[a1].s[0]\n"
115 "fmla v13.4s, %[b0].4s, %[a1].s[1]\n"
116 "fmla v14.4s, %[b0].4s, %[a1].s[2]\n"
117 "fmla v15.4s, %[b0].4s, %[a1].s[3]\n"
118 "ldr %q[b0], [%[b_ptr], #48]\n"
119
120 "fmla v16.4s, %[b1].4s, %[a0].s[0]\n"
121 "fmla v17.4s, %[b1].4s, %[a0].s[1]\n"
122 ASM_PREFETCH("[%[a_ptr], #320]")
123 "fmla v18.4s, %[b1].4s, %[a0].s[2]\n"
124 "fmla v19.4s, %[b1].4s, %[a0].s[3]\n"
125 "fmla v20.4s, %[b1].4s, %[a1].s[0]\n"
126 "fmla v21.4s, %[b1].4s, %[a1].s[1]\n"
127 "fmla v22.4s, %[b1].4s, %[a1].s[2]\n"
128 "fmla v23.4s, %[b1].4s, %[a1].s[3]\n"
129 "ldr %q[b1], [%[b_ptr], #64]\n"
130
131 "fmla v24.4s, %[b2].4s, %[a0].s[0]\n"
132 "fmla v25.4s, %[b2].4s, %[a0].s[1]\n"
133 ASM_PREFETCH("[%[b_ptr], #448]")
134 "fmla v26.4s, %[b2].4s, %[a0].s[2]\n"
135 "fmla v27.4s, %[b2].4s, %[a0].s[3]\n"
136 "ldr %q[a0], [%[a_ptr], #32]\n"
137 "fmla v28.4s, %[b2].4s, %[a1].s[0]\n"
138 "fmla v29.4s, %[b2].4s, %[a1].s[1]\n"
139 "fmla v30.4s, %[b2].4s, %[a1].s[2]\n"
140 "fmla v31.4s, %[b2].4s, %[a1].s[3]\n"
141 "ldr %q[a1], [%[a_ptr], #48]\n"
142
143 "fmla v8.4s , %[b0].4s, %[a0].s[0]\n"
144 "fmla v9.4s , %[b0].4s, %[a0].s[1]\n"
145 "ldr %q[b2], [%[b_ptr], #80]\n"
146 "fmla v10.4s, %[b0].4s, %[a0].s[2]\n"
147 "fmla v11.4s, %[b0].4s, %[a0].s[3]\n"
148 "fmla v12.4s, %[b0].4s, %[a1].s[0]\n"
149 "fmla v13.4s, %[b0].4s, %[a1].s[1]\n"
150 "fmla v14.4s, %[b0].4s, %[a1].s[2]\n"
151 "fmla v15.4s, %[b0].4s, %[a1].s[3]\n"
152 "ldr %q[b0], [%[b_ptr], #96]\n"
153
154 "fmla v16.4s, %[b1].4s, %[a0].s[0]\n"
155 "fmla v17.4s, %[b1].4s, %[a0].s[1]\n"
156 "fmla v18.4s, %[b1].4s, %[a0].s[2]\n"
157 "fmla v19.4s, %[b1].4s, %[a0].s[3]\n"
158 ASM_PREFETCH("[%[b_ptr], #512]")
159 "fmla v20.4s, %[b1].4s, %[a1].s[0]\n"
160 "fmla v21.4s, %[b1].4s, %[a1].s[1]\n"
161 "subs %w[k], %w[k], #1\n"
162 "fmla v22.4s, %[b1].4s, %[a1].s[2]\n"
163 "fmla v23.4s, %[b1].4s, %[a1].s[3]\n"
164 "ldr %q[b1], [%[b_ptr], #112]\n"
165
166 "fmla v24.4s, %[b2].4s, %[a0].s[0]\n"
167 "fmla v25.4s, %[b2].4s, %[a0].s[1]\n"
168 "add %[a_ptr], %[a_ptr], #64\n"
169 "fmla v26.4s, %[b2].4s, %[a0].s[2]\n"
170 "fmla v27.4s, %[b2].4s, %[a0].s[3]\n"
171 "ldr %q[a0], [%[a_ptr]]\n"
172 "fmla v28.4s, %[b2].4s, %[a1].s[0]\n"
173 "fmla v29.4s, %[b2].4s, %[a1].s[1]\n"
174 "add %[b_ptr], %[b_ptr], #96\n"
175 "fmla v30.4s, %[b2].4s, %[a1].s[2]\n"
176 "fmla v31.4s, %[b2].4s, %[a1].s[3]\n"
177 "ldr %q[a1], [%[a_ptr], #16]\n"
178 "bne 1b\n"
179
180 // Target to use when K is 1 or 2 (i.e. zero iterations of main loop)
181 "4:\n"
182
183 // Branch to alternative tail for odd K
184 "cbnz %w[oddk], 2f\n"
185
186 // Detached final iteration (even K)
187 "fmla v8.4s , %[b0].4s, %[a0].s[0]\n"
188 "fmla v9.4s , %[b0].4s, %[a0].s[1]\n"
189 "ldr %q[b2], [%[b_ptr], #32]\n"
190 "fmla v10.4s, %[b0].4s, %[a0].s[2]\n"
191 "fmla v11.4s, %[b0].4s, %[a0].s[3]\n"
192 "fmla v12.4s, %[b0].4s, %[a1].s[0]\n"
193 "fmla v13.4s, %[b0].4s, %[a1].s[1]\n"
194 "fmla v14.4s, %[b0].4s, %[a1].s[2]\n"
195 "fmla v15.4s, %[b0].4s, %[a1].s[3]\n"
196 "ldr %q[b0], [%[b_ptr], #48]\n"
197
198 "fmla v16.4s, %[b1].4s, %[a0].s[0]\n"
199 "fmla v17.4s, %[b1].4s, %[a0].s[1]\n"
200 "fmla v18.4s, %[b1].4s, %[a0].s[2]\n"
201 "fmla v19.4s, %[b1].4s, %[a0].s[3]\n"
202 "fmla v20.4s, %[b1].4s, %[a1].s[0]\n"
203 "fmla v21.4s, %[b1].4s, %[a1].s[1]\n"
204 "fmla v22.4s, %[b1].4s, %[a1].s[2]\n"
205 "fmla v23.4s, %[b1].4s, %[a1].s[3]\n"
206 "ldr %q[b1], [%[b_ptr], #64]\n"
207
208 "fmla v24.4s, %[b2].4s, %[a0].s[0]\n"
209 "fmla v25.4s, %[b2].4s, %[a0].s[1]\n"
210 "add %[a_ptr], %[a_ptr], #64\n"
211 "fmla v26.4s, %[b2].4s, %[a0].s[2]\n"
212 "fmla v27.4s, %[b2].4s, %[a0].s[3]\n"
213 "ldr %q[a0], [%[a_ptr], #-32]\n"
214 "fmla v28.4s, %[b2].4s, %[a1].s[0]\n"
215 "fmla v29.4s, %[b2].4s, %[a1].s[1]\n"
216 "add %[b_ptr], %[b_ptr], #96\n"
217 "fmla v30.4s, %[b2].4s, %[a1].s[2]\n"
218 "fmla v31.4s, %[b2].4s, %[a1].s[3]\n"
219 "ldr %q[a1], [%[a_ptr], #-16]\n"
220
221 "fmla v8.4s , %[b0].4s, %[a0].s[0]\n"
222 "fmla v16.4s, %[b1].4s, %[a0].s[0]\n"
223 "ldr %q[b2], [%[b_ptr], #-16]\n"
224 "fmla v9.4s , %[b0].4s, %[a0].s[1]\n"
225 "str q8, [%[c_ptr], #0]\n"
226 "fmla v17.4s, %[b1].4s, %[a0].s[1]\n"
227 "str q16, [%[c_ptr], #16]\n"
228 "fmla v24.4s, %[b2].4s, %[a0].s[0]\n"
229 "str q24, [%[c_ptr], #32]\n"
230
231 "fmla v25.4s, %[b2].4s, %[a0].s[1]\n"
232 "str q9, [%[c_ptr], #48]\n"
233 "fmla v10.4s, %[b0].4s, %[a0].s[2]\n"
234 "str q17, [%[c_ptr], #64]\n"
235 "fmla v18.4s, %[b1].4s, %[a0].s[2]\n"
236 "str q25, [%[c_ptr], #80]\n"
237 "fmla v26.4s, %[b2].4s, %[a0].s[2]\n"
238 "str q10, [%[c_ptr], #96]\n"
239
240 "fmla v11.4s, %[b0].4s, %[a0].s[3]\n"
241 "str q18, [%[c_ptr], #112]\n"
242 "fmla v19.4s, %[b1].4s, %[a0].s[3]\n"
243 "str q26, [%[c_ptr], #128]\n"
244 "fmla v27.4s, %[b2].4s, %[a0].s[3]\n"
245 "str q11, [%[c_ptr], #144]\n"
246
247 "fmla v12.4s, %[b0].4s, %[a1].s[0]\n"
248 "str q19, [%[c_ptr], #160]\n"
249 "fmla v20.4s, %[b1].4s, %[a1].s[0]\n"
250 "str q27, [%[c_ptr], #176]\n"
251 "fmla v28.4s, %[b2].4s, %[a1].s[0]\n"
252 "str q12, [%[c_ptr], #192]\n"
253
254 "fmla v13.4s, %[b0].4s, %[a1].s[1]\n"
255 "str q20, [%[c_ptr], #208]\n"
256 "fmla v21.4s, %[b1].4s, %[a1].s[1]\n"
257 "str q28, [%[c_ptr], #224]\n"
258 "fmla v29.4s, %[b2].4s, %[a1].s[1]\n"
259 "str q13, [%[c_ptr], #240]\n"
260
261 "fmla v14.4s, %[b0].4s, %[a1].s[2]\n"
262 "str q21, [%[c_ptr], #256]\n"
263 "fmla v22.4s, %[b1].4s, %[a1].s[2]\n"
264 "str q29, [%[c_ptr], #272]\n"
265 "fmla v30.4s, %[b2].4s, %[a1].s[2]\n"
266 "str q14, [%[c_ptr], #288]\n"
267
268 "fmla v15.4s, %[b0].4s, %[a1].s[3]\n"
269 "str q22, [%[c_ptr], #304]\n"
270 "fmla v23.4s, %[b1].4s, %[a1].s[3]\n"
271 "str q30, [%[c_ptr], #320]\n"
272 "fmla v31.4s, %[b2].4s, %[a1].s[3]\n"
273 "str q15, [%[c_ptr], #336]\n"
274
275 "b 3f\n"
276
277 // Detached final iteration (odd K)
278 "2:\n"
279 "fmla v8.4s , %[b0].4s, %[a0].s[0]\n"
280 "ldr %q[b2], [%[b_ptr], #32]\n"
281 "fmla v16.4s, %[b1].4s, %[a0].s[0]\n"
282 "fmla v9.4s , %[b0].4s, %[a0].s[1]\n"
283 "str q8, [%[c_ptr], #0]\n"
284 "fmla v17.4s, %[b1].4s, %[a0].s[1]\n"
285 "str q16, [%[c_ptr], #16]\n"
286 "fmla v24.4s, %[b2].4s, %[a0].s[0]\n"
287 "add %[b_ptr], %[b_ptr], #48\n"
288 "add %[a_ptr], %[a_ptr], #32\n"
289 "str q24, [%[c_ptr], #32]\n"
290 "fmla v25.4s, %[b2].4s, %[a0].s[1]\n"
291 "str q9, [%[c_ptr], #48]\n"
292
293 "fmla v10.4s, %[b0].4s, %[a0].s[2]\n"
294 "str q17, [%[c_ptr], #64]\n"
295 "fmla v18.4s, %[b1].4s, %[a0].s[2]\n"
296 "str q25, [%[c_ptr], #80]\n"
297 "fmla v26.4s, %[b2].4s, %[a0].s[2]\n"
298 "str q10, [%[c_ptr], #96]\n"
299
300 "fmla v11.4s, %[b0].4s, %[a0].s[3]\n"
301 "str q18, [%[c_ptr], #112]\n"
302 "fmla v19.4s, %[b1].4s, %[a0].s[3]\n"
303 "str q26, [%[c_ptr], #128]\n"
304 "fmla v27.4s, %[b2].4s, %[a0].s[3]\n"
305 "str q11, [%[c_ptr], #144]\n"
306
307 "fmla v12.4s, %[b0].4s, %[a1].s[0]\n"
308 "str q19, [%[c_ptr], #160]\n"
309 "fmla v20.4s, %[b1].4s, %[a1].s[0]\n"
310 "str q27, [%[c_ptr], #176]\n"
311 "fmla v28.4s, %[b2].4s, %[a1].s[0]\n"
312 "str q12, [%[c_ptr], #192]\n"
313
314 "fmla v13.4s, %[b0].4s, %[a1].s[1]\n"
315 "str q20, [%[c_ptr], #208]\n"
316 "fmla v21.4s, %[b1].4s, %[a1].s[1]\n"
317 "str q28, [%[c_ptr], #224]\n"
318 "fmla v29.4s, %[b2].4s, %[a1].s[1]\n"
319 "str q13, [%[c_ptr], #240]\n"
320
321 "fmla v14.4s, %[b0].4s, %[a1].s[2]\n"
322 "str q21, [%[c_ptr], #256]\n"
323 "fmla v22.4s, %[b1].4s, %[a1].s[2]\n"
324 "str q29, [%[c_ptr], #272]\n"
325 "fmla v30.4s, %[b2].4s, %[a1].s[2]\n"
326 "str q14, [%[c_ptr], #288]\n"
327
328 "fmla v15.4s, %[b0].4s, %[a1].s[3]\n"
329 "str q22, [%[c_ptr], #304]\n"
330 "fmla v23.4s, %[b1].4s, %[a1].s[3]\n"
331 "str q30, [%[c_ptr], #320]\n"
332 "fmla v31.4s, %[b2].4s, %[a1].s[3]\n"
333 "str q15, [%[c_ptr], #336]\n"
334
335 // Common tail
336 "3:\n"
337 "str q23, [%[c_ptr], #352]\n"
338 "str q31, [%[c_ptr], #368]\n"
339 "add %[c_ptr], %[c_ptr], #384\n"
340 :
341 [a_ptr] "+r" (a_ptr), [b_ptr] "+r" (b_ptr), [c_ptr] "+r" (c_ptr),
342 [a0] "+w" (a0), [a1] "+w" (a1),
343 [b0] "+w" (b0), [b1] "+w" (b1), [b2] "+w" (b2), [k] "+r" (k)
344 : [oddk] "r" (oddk)
345 : "x20", "x21", "v8", "v9", "v10", "v11", "v12", "v13", "v14", "v15", "v16", "v17", "v18",
346 "v19", "v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "v30", "v31", "cc"
347 );
348 }
349 }
350 }
351
352 } // namespace arm_gemm
353
354 #endif
355