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[mirror_qemu.git] / target / s390x / tcg / vec_int_helper.c
1 /*
2 * QEMU TCG support -- s390x vector integer instruction support
3 *
4 * Copyright (C) 2019 Red Hat Inc
5 *
6 * Authors:
7 * David Hildenbrand <david@redhat.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2 or later.
10 * See the COPYING file in the top-level directory.
11 */
12 #include "qemu/osdep.h"
13 #include "qemu-common.h"
14 #include "cpu.h"
15 #include "vec.h"
16 #include "exec/helper-proto.h"
17 #include "tcg/tcg-gvec-desc.h"
18
19 static bool s390_vec_is_zero(const S390Vector *v)
20 {
21 return !v->doubleword[0] && !v->doubleword[1];
22 }
23
24 static void s390_vec_xor(S390Vector *res, const S390Vector *a,
25 const S390Vector *b)
26 {
27 res->doubleword[0] = a->doubleword[0] ^ b->doubleword[0];
28 res->doubleword[1] = a->doubleword[1] ^ b->doubleword[1];
29 }
30
31 static void s390_vec_and(S390Vector *res, const S390Vector *a,
32 const S390Vector *b)
33 {
34 res->doubleword[0] = a->doubleword[0] & b->doubleword[0];
35 res->doubleword[1] = a->doubleword[1] & b->doubleword[1];
36 }
37
38 static bool s390_vec_equal(const S390Vector *a, const S390Vector *b)
39 {
40 return a->doubleword[0] == b->doubleword[0] &&
41 a->doubleword[1] == b->doubleword[1];
42 }
43
44 static void s390_vec_shl(S390Vector *d, const S390Vector *a, uint64_t count)
45 {
46 uint64_t tmp;
47
48 g_assert(count < 128);
49 if (count == 0) {
50 d->doubleword[0] = a->doubleword[0];
51 d->doubleword[1] = a->doubleword[1];
52 } else if (count == 64) {
53 d->doubleword[0] = a->doubleword[1];
54 d->doubleword[1] = 0;
55 } else if (count < 64) {
56 tmp = extract64(a->doubleword[1], 64 - count, count);
57 d->doubleword[1] = a->doubleword[1] << count;
58 d->doubleword[0] = (a->doubleword[0] << count) | tmp;
59 } else {
60 d->doubleword[0] = a->doubleword[1] << (count - 64);
61 d->doubleword[1] = 0;
62 }
63 }
64
65 static void s390_vec_sar(S390Vector *d, const S390Vector *a, uint64_t count)
66 {
67 uint64_t tmp;
68
69 if (count == 0) {
70 d->doubleword[0] = a->doubleword[0];
71 d->doubleword[1] = a->doubleword[1];
72 } else if (count == 64) {
73 tmp = (int64_t)a->doubleword[0] >> 63;
74 d->doubleword[1] = a->doubleword[0];
75 d->doubleword[0] = tmp;
76 } else if (count < 64) {
77 tmp = a->doubleword[1] >> count;
78 d->doubleword[1] = deposit64(tmp, 64 - count, count, a->doubleword[0]);
79 d->doubleword[0] = (int64_t)a->doubleword[0] >> count;
80 } else {
81 tmp = (int64_t)a->doubleword[0] >> 63;
82 d->doubleword[1] = (int64_t)a->doubleword[0] >> (count - 64);
83 d->doubleword[0] = tmp;
84 }
85 }
86
87 static void s390_vec_shr(S390Vector *d, const S390Vector *a, uint64_t count)
88 {
89 uint64_t tmp;
90
91 g_assert(count < 128);
92 if (count == 0) {
93 d->doubleword[0] = a->doubleword[0];
94 d->doubleword[1] = a->doubleword[1];
95 } else if (count == 64) {
96 d->doubleword[1] = a->doubleword[0];
97 d->doubleword[0] = 0;
98 } else if (count < 64) {
99 tmp = a->doubleword[1] >> count;
100 d->doubleword[1] = deposit64(tmp, 64 - count, count, a->doubleword[0]);
101 d->doubleword[0] = a->doubleword[0] >> count;
102 } else {
103 d->doubleword[1] = a->doubleword[0] >> (count - 64);
104 d->doubleword[0] = 0;
105 }
106 }
107 #define DEF_VAVG(BITS) \
108 void HELPER(gvec_vavg##BITS)(void *v1, const void *v2, const void *v3, \
109 uint32_t desc) \
110 { \
111 int i; \
112 \
113 for (i = 0; i < (128 / BITS); i++) { \
114 const int32_t a = (int##BITS##_t)s390_vec_read_element##BITS(v2, i); \
115 const int32_t b = (int##BITS##_t)s390_vec_read_element##BITS(v3, i); \
116 \
117 s390_vec_write_element##BITS(v1, i, (a + b + 1) >> 1); \
118 } \
119 }
120 DEF_VAVG(8)
121 DEF_VAVG(16)
122
123 #define DEF_VAVGL(BITS) \
124 void HELPER(gvec_vavgl##BITS)(void *v1, const void *v2, const void *v3, \
125 uint32_t desc) \
126 { \
127 int i; \
128 \
129 for (i = 0; i < (128 / BITS); i++) { \
130 const uint##BITS##_t a = s390_vec_read_element##BITS(v2, i); \
131 const uint##BITS##_t b = s390_vec_read_element##BITS(v3, i); \
132 \
133 s390_vec_write_element##BITS(v1, i, (a + b + 1) >> 1); \
134 } \
135 }
136 DEF_VAVGL(8)
137 DEF_VAVGL(16)
138
139 #define DEF_VCLZ(BITS) \
140 void HELPER(gvec_vclz##BITS)(void *v1, const void *v2, uint32_t desc) \
141 { \
142 int i; \
143 \
144 for (i = 0; i < (128 / BITS); i++) { \
145 const uint##BITS##_t a = s390_vec_read_element##BITS(v2, i); \
146 \
147 s390_vec_write_element##BITS(v1, i, clz32(a) - 32 + BITS); \
148 } \
149 }
150 DEF_VCLZ(8)
151 DEF_VCLZ(16)
152
153 #define DEF_VCTZ(BITS) \
154 void HELPER(gvec_vctz##BITS)(void *v1, const void *v2, uint32_t desc) \
155 { \
156 int i; \
157 \
158 for (i = 0; i < (128 / BITS); i++) { \
159 const uint##BITS##_t a = s390_vec_read_element##BITS(v2, i); \
160 \
161 s390_vec_write_element##BITS(v1, i, a ? ctz32(a) : BITS); \
162 } \
163 }
164 DEF_VCTZ(8)
165 DEF_VCTZ(16)
166
167 /* like binary multiplication, but XOR instead of addition */
168 #define DEF_GALOIS_MULTIPLY(BITS, TBITS) \
169 static uint##TBITS##_t galois_multiply##BITS(uint##TBITS##_t a, \
170 uint##TBITS##_t b) \
171 { \
172 uint##TBITS##_t res = 0; \
173 \
174 while (b) { \
175 if (b & 0x1) { \
176 res = res ^ a; \
177 } \
178 a = a << 1; \
179 b = b >> 1; \
180 } \
181 return res; \
182 }
183 DEF_GALOIS_MULTIPLY(8, 16)
184 DEF_GALOIS_MULTIPLY(16, 32)
185 DEF_GALOIS_MULTIPLY(32, 64)
186
187 static S390Vector galois_multiply64(uint64_t a, uint64_t b)
188 {
189 S390Vector res = {};
190 S390Vector va = {
191 .doubleword[1] = a,
192 };
193 S390Vector vb = {
194 .doubleword[1] = b,
195 };
196
197 while (!s390_vec_is_zero(&vb)) {
198 if (vb.doubleword[1] & 0x1) {
199 s390_vec_xor(&res, &res, &va);
200 }
201 s390_vec_shl(&va, &va, 1);
202 s390_vec_shr(&vb, &vb, 1);
203 }
204 return res;
205 }
206
207 #define DEF_VGFM(BITS, TBITS) \
208 void HELPER(gvec_vgfm##BITS)(void *v1, const void *v2, const void *v3, \
209 uint32_t desc) \
210 { \
211 int i; \
212 \
213 for (i = 0; i < (128 / TBITS); i++) { \
214 uint##BITS##_t a = s390_vec_read_element##BITS(v2, i * 2); \
215 uint##BITS##_t b = s390_vec_read_element##BITS(v3, i * 2); \
216 uint##TBITS##_t d = galois_multiply##BITS(a, b); \
217 \
218 a = s390_vec_read_element##BITS(v2, i * 2 + 1); \
219 b = s390_vec_read_element##BITS(v3, i * 2 + 1); \
220 d = d ^ galois_multiply32(a, b); \
221 s390_vec_write_element##TBITS(v1, i, d); \
222 } \
223 }
224 DEF_VGFM(8, 16)
225 DEF_VGFM(16, 32)
226 DEF_VGFM(32, 64)
227
228 void HELPER(gvec_vgfm64)(void *v1, const void *v2, const void *v3,
229 uint32_t desc)
230 {
231 S390Vector tmp1, tmp2;
232 uint64_t a, b;
233
234 a = s390_vec_read_element64(v2, 0);
235 b = s390_vec_read_element64(v3, 0);
236 tmp1 = galois_multiply64(a, b);
237 a = s390_vec_read_element64(v2, 1);
238 b = s390_vec_read_element64(v3, 1);
239 tmp2 = galois_multiply64(a, b);
240 s390_vec_xor(v1, &tmp1, &tmp2);
241 }
242
243 #define DEF_VGFMA(BITS, TBITS) \
244 void HELPER(gvec_vgfma##BITS)(void *v1, const void *v2, const void *v3, \
245 const void *v4, uint32_t desc) \
246 { \
247 int i; \
248 \
249 for (i = 0; i < (128 / TBITS); i++) { \
250 uint##BITS##_t a = s390_vec_read_element##BITS(v2, i * 2); \
251 uint##BITS##_t b = s390_vec_read_element##BITS(v3, i * 2); \
252 uint##TBITS##_t d = galois_multiply##BITS(a, b); \
253 \
254 a = s390_vec_read_element##BITS(v2, i * 2 + 1); \
255 b = s390_vec_read_element##BITS(v3, i * 2 + 1); \
256 d = d ^ galois_multiply32(a, b); \
257 d = d ^ s390_vec_read_element##TBITS(v4, i); \
258 s390_vec_write_element##TBITS(v1, i, d); \
259 } \
260 }
261 DEF_VGFMA(8, 16)
262 DEF_VGFMA(16, 32)
263 DEF_VGFMA(32, 64)
264
265 void HELPER(gvec_vgfma64)(void *v1, const void *v2, const void *v3,
266 const void *v4, uint32_t desc)
267 {
268 S390Vector tmp1, tmp2;
269 uint64_t a, b;
270
271 a = s390_vec_read_element64(v2, 0);
272 b = s390_vec_read_element64(v3, 0);
273 tmp1 = galois_multiply64(a, b);
274 a = s390_vec_read_element64(v2, 1);
275 b = s390_vec_read_element64(v3, 1);
276 tmp2 = galois_multiply64(a, b);
277 s390_vec_xor(&tmp1, &tmp1, &tmp2);
278 s390_vec_xor(v1, &tmp1, v4);
279 }
280
281 #define DEF_VMAL(BITS) \
282 void HELPER(gvec_vmal##BITS)(void *v1, const void *v2, const void *v3, \
283 const void *v4, uint32_t desc) \
284 { \
285 int i; \
286 \
287 for (i = 0; i < (128 / BITS); i++) { \
288 const uint##BITS##_t a = s390_vec_read_element##BITS(v2, i); \
289 const uint##BITS##_t b = s390_vec_read_element##BITS(v3, i); \
290 const uint##BITS##_t c = s390_vec_read_element##BITS(v4, i); \
291 \
292 s390_vec_write_element##BITS(v1, i, a * b + c); \
293 } \
294 }
295 DEF_VMAL(8)
296 DEF_VMAL(16)
297
298 #define DEF_VMAH(BITS) \
299 void HELPER(gvec_vmah##BITS)(void *v1, const void *v2, const void *v3, \
300 const void *v4, uint32_t desc) \
301 { \
302 int i; \
303 \
304 for (i = 0; i < (128 / BITS); i++) { \
305 const int32_t a = (int##BITS##_t)s390_vec_read_element##BITS(v2, i); \
306 const int32_t b = (int##BITS##_t)s390_vec_read_element##BITS(v3, i); \
307 const int32_t c = (int##BITS##_t)s390_vec_read_element##BITS(v4, i); \
308 \
309 s390_vec_write_element##BITS(v1, i, (a * b + c) >> BITS); \
310 } \
311 }
312 DEF_VMAH(8)
313 DEF_VMAH(16)
314
315 #define DEF_VMALH(BITS) \
316 void HELPER(gvec_vmalh##BITS)(void *v1, const void *v2, const void *v3, \
317 const void *v4, uint32_t desc) \
318 { \
319 int i; \
320 \
321 for (i = 0; i < (128 / BITS); i++) { \
322 const uint##BITS##_t a = s390_vec_read_element##BITS(v2, i); \
323 const uint##BITS##_t b = s390_vec_read_element##BITS(v3, i); \
324 const uint##BITS##_t c = s390_vec_read_element##BITS(v4, i); \
325 \
326 s390_vec_write_element##BITS(v1, i, (a * b + c) >> BITS); \
327 } \
328 }
329 DEF_VMALH(8)
330 DEF_VMALH(16)
331
332 #define DEF_VMAE(BITS, TBITS) \
333 void HELPER(gvec_vmae##BITS)(void *v1, const void *v2, const void *v3, \
334 const void *v4, uint32_t desc) \
335 { \
336 int i, j; \
337 \
338 for (i = 0, j = 0; i < (128 / TBITS); i++, j += 2) { \
339 int##TBITS##_t a = (int##BITS##_t)s390_vec_read_element##BITS(v2, j); \
340 int##TBITS##_t b = (int##BITS##_t)s390_vec_read_element##BITS(v3, j); \
341 int##TBITS##_t c = s390_vec_read_element##TBITS(v4, i); \
342 \
343 s390_vec_write_element##TBITS(v1, i, a * b + c); \
344 } \
345 }
346 DEF_VMAE(8, 16)
347 DEF_VMAE(16, 32)
348 DEF_VMAE(32, 64)
349
350 #define DEF_VMALE(BITS, TBITS) \
351 void HELPER(gvec_vmale##BITS)(void *v1, const void *v2, const void *v3, \
352 const void *v4, uint32_t desc) \
353 { \
354 int i, j; \
355 \
356 for (i = 0, j = 0; i < (128 / TBITS); i++, j += 2) { \
357 uint##TBITS##_t a = s390_vec_read_element##BITS(v2, j); \
358 uint##TBITS##_t b = s390_vec_read_element##BITS(v3, j); \
359 uint##TBITS##_t c = s390_vec_read_element##TBITS(v4, i); \
360 \
361 s390_vec_write_element##TBITS(v1, i, a * b + c); \
362 } \
363 }
364 DEF_VMALE(8, 16)
365 DEF_VMALE(16, 32)
366 DEF_VMALE(32, 64)
367
368 #define DEF_VMAO(BITS, TBITS) \
369 void HELPER(gvec_vmao##BITS)(void *v1, const void *v2, const void *v3, \
370 const void *v4, uint32_t desc) \
371 { \
372 int i, j; \
373 \
374 for (i = 0, j = 1; i < (128 / TBITS); i++, j += 2) { \
375 int##TBITS##_t a = (int##BITS##_t)s390_vec_read_element##BITS(v2, j); \
376 int##TBITS##_t b = (int##BITS##_t)s390_vec_read_element##BITS(v3, j); \
377 int##TBITS##_t c = s390_vec_read_element##TBITS(v4, i); \
378 \
379 s390_vec_write_element##TBITS(v1, i, a * b + c); \
380 } \
381 }
382 DEF_VMAO(8, 16)
383 DEF_VMAO(16, 32)
384 DEF_VMAO(32, 64)
385
386 #define DEF_VMALO(BITS, TBITS) \
387 void HELPER(gvec_vmalo##BITS)(void *v1, const void *v2, const void *v3, \
388 const void *v4, uint32_t desc) \
389 { \
390 int i, j; \
391 \
392 for (i = 0, j = 1; i < (128 / TBITS); i++, j += 2) { \
393 uint##TBITS##_t a = s390_vec_read_element##BITS(v2, j); \
394 uint##TBITS##_t b = s390_vec_read_element##BITS(v3, j); \
395 uint##TBITS##_t c = s390_vec_read_element##TBITS(v4, i); \
396 \
397 s390_vec_write_element##TBITS(v1, i, a * b + c); \
398 } \
399 }
400 DEF_VMALO(8, 16)
401 DEF_VMALO(16, 32)
402 DEF_VMALO(32, 64)
403
404 #define DEF_VMH(BITS) \
405 void HELPER(gvec_vmh##BITS)(void *v1, const void *v2, const void *v3, \
406 uint32_t desc) \
407 { \
408 int i; \
409 \
410 for (i = 0; i < (128 / BITS); i++) { \
411 const int32_t a = (int##BITS##_t)s390_vec_read_element##BITS(v2, i); \
412 const int32_t b = (int##BITS##_t)s390_vec_read_element##BITS(v3, i); \
413 \
414 s390_vec_write_element##BITS(v1, i, (a * b) >> BITS); \
415 } \
416 }
417 DEF_VMH(8)
418 DEF_VMH(16)
419
420 #define DEF_VMLH(BITS) \
421 void HELPER(gvec_vmlh##BITS)(void *v1, const void *v2, const void *v3, \
422 uint32_t desc) \
423 { \
424 int i; \
425 \
426 for (i = 0; i < (128 / BITS); i++) { \
427 const uint##BITS##_t a = s390_vec_read_element##BITS(v2, i); \
428 const uint##BITS##_t b = s390_vec_read_element##BITS(v3, i); \
429 \
430 s390_vec_write_element##BITS(v1, i, (a * b) >> BITS); \
431 } \
432 }
433 DEF_VMLH(8)
434 DEF_VMLH(16)
435
436 #define DEF_VME(BITS, TBITS) \
437 void HELPER(gvec_vme##BITS)(void *v1, const void *v2, const void *v3, \
438 uint32_t desc) \
439 { \
440 int i, j; \
441 \
442 for (i = 0, j = 0; i < (128 / TBITS); i++, j += 2) { \
443 int##TBITS##_t a = (int##BITS##_t)s390_vec_read_element##BITS(v2, j); \
444 int##TBITS##_t b = (int##BITS##_t)s390_vec_read_element##BITS(v3, j); \
445 \
446 s390_vec_write_element##TBITS(v1, i, a * b); \
447 } \
448 }
449 DEF_VME(8, 16)
450 DEF_VME(16, 32)
451 DEF_VME(32, 64)
452
453 #define DEF_VMLE(BITS, TBITS) \
454 void HELPER(gvec_vmle##BITS)(void *v1, const void *v2, const void *v3, \
455 uint32_t desc) \
456 { \
457 int i, j; \
458 \
459 for (i = 0, j = 0; i < (128 / TBITS); i++, j += 2) { \
460 const uint##TBITS##_t a = s390_vec_read_element##BITS(v2, j); \
461 const uint##TBITS##_t b = s390_vec_read_element##BITS(v3, j); \
462 \
463 s390_vec_write_element##TBITS(v1, i, a * b); \
464 } \
465 }
466 DEF_VMLE(8, 16)
467 DEF_VMLE(16, 32)
468 DEF_VMLE(32, 64)
469
470 #define DEF_VMO(BITS, TBITS) \
471 void HELPER(gvec_vmo##BITS)(void *v1, const void *v2, const void *v3, \
472 uint32_t desc) \
473 { \
474 int i, j; \
475 \
476 for (i = 0, j = 1; i < (128 / TBITS); i++, j += 2) { \
477 int##TBITS##_t a = (int##BITS##_t)s390_vec_read_element##BITS(v2, j); \
478 int##TBITS##_t b = (int##BITS##_t)s390_vec_read_element##BITS(v3, j); \
479 \
480 s390_vec_write_element##TBITS(v1, i, a * b); \
481 } \
482 }
483 DEF_VMO(8, 16)
484 DEF_VMO(16, 32)
485 DEF_VMO(32, 64)
486
487 #define DEF_VMLO(BITS, TBITS) \
488 void HELPER(gvec_vmlo##BITS)(void *v1, const void *v2, const void *v3, \
489 uint32_t desc) \
490 { \
491 int i, j; \
492 \
493 for (i = 0, j = 1; i < (128 / TBITS); i++, j += 2) { \
494 const uint##TBITS##_t a = s390_vec_read_element##BITS(v2, j); \
495 const uint##TBITS##_t b = s390_vec_read_element##BITS(v3, j); \
496 \
497 s390_vec_write_element##TBITS(v1, i, a * b); \
498 } \
499 }
500 DEF_VMLO(8, 16)
501 DEF_VMLO(16, 32)
502 DEF_VMLO(32, 64)
503
504 #define DEF_VPOPCT(BITS) \
505 void HELPER(gvec_vpopct##BITS)(void *v1, const void *v2, uint32_t desc) \
506 { \
507 int i; \
508 \
509 for (i = 0; i < (128 / BITS); i++) { \
510 const uint##BITS##_t a = s390_vec_read_element##BITS(v2, i); \
511 \
512 s390_vec_write_element##BITS(v1, i, ctpop32(a)); \
513 } \
514 }
515 DEF_VPOPCT(8)
516 DEF_VPOPCT(16)
517
518 #define DEF_VERIM(BITS) \
519 void HELPER(gvec_verim##BITS)(void *v1, const void *v2, const void *v3, \
520 uint32_t desc) \
521 { \
522 const uint8_t count = simd_data(desc); \
523 int i; \
524 \
525 for (i = 0; i < (128 / BITS); i++) { \
526 const uint##BITS##_t a = s390_vec_read_element##BITS(v1, i); \
527 const uint##BITS##_t b = s390_vec_read_element##BITS(v2, i); \
528 const uint##BITS##_t mask = s390_vec_read_element##BITS(v3, i); \
529 const uint##BITS##_t d = (a & ~mask) | (rol##BITS(b, count) & mask); \
530 \
531 s390_vec_write_element##BITS(v1, i, d); \
532 } \
533 }
534 DEF_VERIM(8)
535 DEF_VERIM(16)
536
537 void HELPER(gvec_vsl)(void *v1, const void *v2, uint64_t count,
538 uint32_t desc)
539 {
540 s390_vec_shl(v1, v2, count);
541 }
542
543 void HELPER(gvec_vsra)(void *v1, const void *v2, uint64_t count,
544 uint32_t desc)
545 {
546 s390_vec_sar(v1, v2, count);
547 }
548
549 void HELPER(gvec_vsrl)(void *v1, const void *v2, uint64_t count,
550 uint32_t desc)
551 {
552 s390_vec_shr(v1, v2, count);
553 }
554
555 #define DEF_VSCBI(BITS) \
556 void HELPER(gvec_vscbi##BITS)(void *v1, const void *v2, const void *v3, \
557 uint32_t desc) \
558 { \
559 int i; \
560 \
561 for (i = 0; i < (128 / BITS); i++) { \
562 const uint##BITS##_t a = s390_vec_read_element##BITS(v2, i); \
563 const uint##BITS##_t b = s390_vec_read_element##BITS(v3, i); \
564 \
565 s390_vec_write_element##BITS(v1, i, a >= b); \
566 } \
567 }
568 DEF_VSCBI(8)
569 DEF_VSCBI(16)
570
571 void HELPER(gvec_vtm)(void *v1, const void *v2, CPUS390XState *env,
572 uint32_t desc)
573 {
574 S390Vector tmp;
575
576 s390_vec_and(&tmp, v1, v2);
577 if (s390_vec_is_zero(&tmp)) {
578 /* Selected bits all zeros; or all mask bits zero */
579 env->cc_op = 0;
580 } else if (s390_vec_equal(&tmp, v2)) {
581 /* Selected bits all ones */
582 env->cc_op = 3;
583 } else {
584 /* Selected bits a mix of zeros and ones */
585 env->cc_op = 1;
586 }
587 }
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