1 /* 2 * M-profile MVE Operations 3 * 4 * Copyright (c) 2021 Linaro, Ltd. 5 * 6 * This library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * This library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #include "qemu/osdep.h" 21 #include "cpu.h" 22 #include "internals.h" 23 #include "vec_internal.h" 24 #include "exec/helper-proto.h" 25 #include "exec/cpu_ldst.h" 26 #include "exec/exec-all.h" 27 #include "tcg/tcg.h" 28 29 static uint16_t mve_element_mask(CPUARMState *env) 30 { 31 /* 32 * Return the mask of which elements in the MVE vector should be 33 * updated. This is a combination of multiple things: 34 * (1) by default, we update every lane in the vector 35 * (2) VPT predication stores its state in the VPR register; 36 * (3) low-overhead-branch tail predication will mask out part 37 * the vector on the final iteration of the loop 38 * (4) if EPSR.ECI is set then we must execute only some beats 39 * of the insn 40 * We combine all these into a 16-bit result with the same semantics 41 * as VPR.P0: 0 to mask the lane, 1 if it is active. 42 * 8-bit vector ops will look at all bits of the result; 43 * 16-bit ops will look at bits 0, 2, 4, ...; 44 * 32-bit ops will look at bits 0, 4, 8 and 12. 45 * Compare pseudocode GetCurInstrBeat(), though that only returns 46 * the 4-bit slice of the mask corresponding to a single beat. 47 */ 48 uint16_t mask = FIELD_EX32(env->v7m.vpr, V7M_VPR, P0); 49 50 if (!(env->v7m.vpr & R_V7M_VPR_MASK01_MASK)) { 51 mask |= 0xff; 52 } 53 if (!(env->v7m.vpr & R_V7M_VPR_MASK23_MASK)) { 54 mask |= 0xff00; 55 } 56 57 if (env->v7m.ltpsize < 4 && 58 env->regs[14] <= (1 << (4 - env->v7m.ltpsize))) { 59 /* 60 * Tail predication active, and this is the last loop iteration. 61 * The element size is (1 << ltpsize), and we only want to process 62 * loopcount elements, so we want to retain the least significant 63 * (loopcount * esize) predicate bits and zero out bits above that. 64 */ 65 int masklen = env->regs[14] << env->v7m.ltpsize; 66 assert(masklen <= 16); 67 mask &= MAKE_64BIT_MASK(0, masklen); 68 } 69 70 if ((env->condexec_bits & 0xf) == 0) { 71 /* 72 * ECI bits indicate which beats are already executed; 73 * we handle this by effectively predicating them out. 74 */ 75 int eci = env->condexec_bits >> 4; 76 switch (eci) { 77 case ECI_NONE: 78 break; 79 case ECI_A0: 80 mask &= 0xfff0; 81 break; 82 case ECI_A0A1: 83 mask &= 0xff00; 84 break; 85 case ECI_A0A1A2: 86 case ECI_A0A1A2B0: 87 mask &= 0xf000; 88 break; 89 default: 90 g_assert_not_reached(); 91 } 92 } 93 94 return mask; 95 } 96 97 static void mve_advance_vpt(CPUARMState *env) 98 { 99 /* Advance the VPT and ECI state if necessary */ 100 uint32_t vpr = env->v7m.vpr; 101 unsigned mask01, mask23; 102 103 if ((env->condexec_bits & 0xf) == 0) { 104 env->condexec_bits = (env->condexec_bits == (ECI_A0A1A2B0 << 4)) ? 105 (ECI_A0 << 4) : (ECI_NONE << 4); 106 } 107 108 if (!(vpr & (R_V7M_VPR_MASK01_MASK | R_V7M_VPR_MASK23_MASK))) { 109 /* VPT not enabled, nothing to do */ 110 return; 111 } 112 113 mask01 = FIELD_EX32(vpr, V7M_VPR, MASK01); 114 mask23 = FIELD_EX32(vpr, V7M_VPR, MASK23); 115 if (mask01 > 8) { 116 /* high bit set, but not 0b1000: invert the relevant half of P0 */ 117 vpr ^= 0xff; 118 } 119 if (mask23 > 8) { 120 /* high bit set, but not 0b1000: invert the relevant half of P0 */ 121 vpr ^= 0xff00; 122 } 123 vpr = FIELD_DP32(vpr, V7M_VPR, MASK01, mask01 << 1); 124 vpr = FIELD_DP32(vpr, V7M_VPR, MASK23, mask23 << 1); 125 env->v7m.vpr = vpr; 126 } 127 128 129 #define DO_VLDR(OP, MSIZE, LDTYPE, ESIZE, TYPE) \ 130 void HELPER(mve_##OP)(CPUARMState *env, void *vd, uint32_t addr) \ 131 { \ 132 TYPE *d = vd; \ 133 uint16_t mask = mve_element_mask(env); \ 134 unsigned b, e; \ 135 /* \ 136 * R_SXTM allows the dest reg to become UNKNOWN for abandoned \ 137 * beats so we don't care if we update part of the dest and \ 138 * then take an exception. \ 139 */ \ 140 for (b = 0, e = 0; b < 16; b += ESIZE, e++) { \ 141 if (mask & (1 << b)) { \ 142 d[H##ESIZE(e)] = cpu_##LDTYPE##_data_ra(env, addr, GETPC()); \ 143 } \ 144 addr += MSIZE; \ 145 } \ 146 mve_advance_vpt(env); \ 147 } 148 149 #define DO_VSTR(OP, MSIZE, STTYPE, ESIZE, TYPE) \ 150 void HELPER(mve_##OP)(CPUARMState *env, void *vd, uint32_t addr) \ 151 { \ 152 TYPE *d = vd; \ 153 uint16_t mask = mve_element_mask(env); \ 154 unsigned b, e; \ 155 for (b = 0, e = 0; b < 16; b += ESIZE, e++) { \ 156 if (mask & (1 << b)) { \ 157 cpu_##STTYPE##_data_ra(env, addr, d[H##ESIZE(e)], GETPC()); \ 158 } \ 159 addr += MSIZE; \ 160 } \ 161 mve_advance_vpt(env); \ 162 } 163 164 DO_VLDR(vldrb, 1, ldub, 1, uint8_t) 165 DO_VLDR(vldrh, 2, lduw, 2, uint16_t) 166 DO_VLDR(vldrw, 4, ldl, 4, uint32_t) 167 168 DO_VSTR(vstrb, 1, stb, 1, uint8_t) 169 DO_VSTR(vstrh, 2, stw, 2, uint16_t) 170 DO_VSTR(vstrw, 4, stl, 4, uint32_t) 171 172 DO_VLDR(vldrb_sh, 1, ldsb, 2, int16_t) 173 DO_VLDR(vldrb_sw, 1, ldsb, 4, int32_t) 174 DO_VLDR(vldrb_uh, 1, ldub, 2, uint16_t) 175 DO_VLDR(vldrb_uw, 1, ldub, 4, uint32_t) 176 DO_VLDR(vldrh_sw, 2, ldsw, 4, int32_t) 177 DO_VLDR(vldrh_uw, 2, lduw, 4, uint32_t) 178 179 DO_VSTR(vstrb_h, 1, stb, 2, int16_t) 180 DO_VSTR(vstrb_w, 1, stb, 4, int32_t) 181 DO_VSTR(vstrh_w, 2, stw, 4, int32_t) 182 183 #undef DO_VLDR 184 #undef DO_VSTR 185 186 /* 187 * The mergemask(D, R, M) macro performs the operation "*D = R" but 188 * storing only the bytes which correspond to 1 bits in M, 189 * leaving other bytes in *D unchanged. We use _Generic 190 * to select the correct implementation based on the type of D. 191 */ 192 193 static void mergemask_ub(uint8_t *d, uint8_t r, uint16_t mask) 194 { 195 if (mask & 1) { 196 *d = r; 197 } 198 } 199 200 static void mergemask_sb(int8_t *d, int8_t r, uint16_t mask) 201 { 202 mergemask_ub((uint8_t *)d, r, mask); 203 } 204 205 static void mergemask_uh(uint16_t *d, uint16_t r, uint16_t mask) 206 { 207 uint16_t bmask = expand_pred_b_data[mask & 3]; 208 *d = (*d & ~bmask) | (r & bmask); 209 } 210 211 static void mergemask_sh(int16_t *d, int16_t r, uint16_t mask) 212 { 213 mergemask_uh((uint16_t *)d, r, mask); 214 } 215 216 static void mergemask_uw(uint32_t *d, uint32_t r, uint16_t mask) 217 { 218 uint32_t bmask = expand_pred_b_data[mask & 0xf]; 219 *d = (*d & ~bmask) | (r & bmask); 220 } 221 222 static void mergemask_sw(int32_t *d, int32_t r, uint16_t mask) 223 { 224 mergemask_uw((uint32_t *)d, r, mask); 225 } 226 227 static void mergemask_uq(uint64_t *d, uint64_t r, uint16_t mask) 228 { 229 uint64_t bmask = expand_pred_b_data[mask & 0xff]; 230 *d = (*d & ~bmask) | (r & bmask); 231 } 232 233 static void mergemask_sq(int64_t *d, int64_t r, uint16_t mask) 234 { 235 mergemask_uq((uint64_t *)d, r, mask); 236 } 237 238 #define mergemask(D, R, M) \ 239 _Generic(D, \ 240 uint8_t *: mergemask_ub, \ 241 int8_t *: mergemask_sb, \ 242 uint16_t *: mergemask_uh, \ 243 int16_t *: mergemask_sh, \ 244 uint32_t *: mergemask_uw, \ 245 int32_t *: mergemask_sw, \ 246 uint64_t *: mergemask_uq, \ 247 int64_t *: mergemask_sq)(D, R, M) 248 249 void HELPER(mve_vdup)(CPUARMState *env, void *vd, uint32_t val) 250 { 251 /* 252 * The generated code already replicated an 8 or 16 bit constant 253 * into the 32-bit value, so we only need to write the 32-bit 254 * value to all elements of the Qreg, allowing for predication. 255 */ 256 uint32_t *d = vd; 257 uint16_t mask = mve_element_mask(env); 258 unsigned e; 259 for (e = 0; e < 16 / 4; e++, mask >>= 4) { 260 mergemask(&d[H4(e)], val, mask); 261 } 262 mve_advance_vpt(env); 263 } 264 265 #define DO_1OP(OP, ESIZE, TYPE, FN) \ 266 void HELPER(mve_##OP)(CPUARMState *env, void *vd, void *vm) \ 267 { \ 268 TYPE *d = vd, *m = vm; \ 269 uint16_t mask = mve_element_mask(env); \ 270 unsigned e; \ 271 for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE) { \ 272 mergemask(&d[H##ESIZE(e)], FN(m[H##ESIZE(e)]), mask); \ 273 } \ 274 mve_advance_vpt(env); \ 275 } 276 277 #define DO_CLS_B(N) (clrsb32(N) - 24) 278 #define DO_CLS_H(N) (clrsb32(N) - 16) 279 280 DO_1OP(vclsb, 1, int8_t, DO_CLS_B) 281 DO_1OP(vclsh, 2, int16_t, DO_CLS_H) 282 DO_1OP(vclsw, 4, int32_t, clrsb32) 283 284 #define DO_CLZ_B(N) (clz32(N) - 24) 285 #define DO_CLZ_H(N) (clz32(N) - 16) 286 287 DO_1OP(vclzb, 1, uint8_t, DO_CLZ_B) 288 DO_1OP(vclzh, 2, uint16_t, DO_CLZ_H) 289 DO_1OP(vclzw, 4, uint32_t, clz32) 290 291 DO_1OP(vrev16b, 2, uint16_t, bswap16) 292 DO_1OP(vrev32b, 4, uint32_t, bswap32) 293 DO_1OP(vrev32h, 4, uint32_t, hswap32) 294 DO_1OP(vrev64b, 8, uint64_t, bswap64) 295 DO_1OP(vrev64h, 8, uint64_t, hswap64) 296 DO_1OP(vrev64w, 8, uint64_t, wswap64) 297 298 #define DO_NOT(N) (~(N)) 299 300 DO_1OP(vmvn, 8, uint64_t, DO_NOT) 301 302 #define DO_ABS(N) ((N) < 0 ? -(N) : (N)) 303 #define DO_FABSH(N) ((N) & dup_const(MO_16, 0x7fff)) 304 #define DO_FABSS(N) ((N) & dup_const(MO_32, 0x7fffffff)) 305 306 DO_1OP(vabsb, 1, int8_t, DO_ABS) 307 DO_1OP(vabsh, 2, int16_t, DO_ABS) 308 DO_1OP(vabsw, 4, int32_t, DO_ABS) 309 310 /* We can do these 64 bits at a time */ 311 DO_1OP(vfabsh, 8, uint64_t, DO_FABSH) 312 DO_1OP(vfabss, 8, uint64_t, DO_FABSS) 313 314 #define DO_NEG(N) (-(N)) 315 #define DO_FNEGH(N) ((N) ^ dup_const(MO_16, 0x8000)) 316 #define DO_FNEGS(N) ((N) ^ dup_const(MO_32, 0x80000000)) 317 318 DO_1OP(vnegb, 1, int8_t, DO_NEG) 319 DO_1OP(vnegh, 2, int16_t, DO_NEG) 320 DO_1OP(vnegw, 4, int32_t, DO_NEG) 321 322 /* We can do these 64 bits at a time */ 323 DO_1OP(vfnegh, 8, uint64_t, DO_FNEGH) 324 DO_1OP(vfnegs, 8, uint64_t, DO_FNEGS) 325 326 /* 327 * 1 operand immediates: Vda is destination and possibly also one source. 328 * All these insns work at 64-bit widths. 329 */ 330 #define DO_1OP_IMM(OP, FN) \ 331 void HELPER(mve_##OP)(CPUARMState *env, void *vda, uint64_t imm) \ 332 { \ 333 uint64_t *da = vda; \ 334 uint16_t mask = mve_element_mask(env); \ 335 unsigned e; \ 336 for (e = 0; e < 16 / 8; e++, mask >>= 8) { \ 337 mergemask(&da[H8(e)], FN(da[H8(e)], imm), mask); \ 338 } \ 339 mve_advance_vpt(env); \ 340 } 341 342 #define DO_MOVI(N, I) (I) 343 #define DO_ANDI(N, I) ((N) & (I)) 344 #define DO_ORRI(N, I) ((N) | (I)) 345 346 DO_1OP_IMM(vmovi, DO_MOVI) 347 DO_1OP_IMM(vandi, DO_ANDI) 348 DO_1OP_IMM(vorri, DO_ORRI) 349 350 #define DO_2OP(OP, ESIZE, TYPE, FN) \ 351 void HELPER(glue(mve_, OP))(CPUARMState *env, \ 352 void *vd, void *vn, void *vm) \ 353 { \ 354 TYPE *d = vd, *n = vn, *m = vm; \ 355 uint16_t mask = mve_element_mask(env); \ 356 unsigned e; \ 357 for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE) { \ 358 mergemask(&d[H##ESIZE(e)], \ 359 FN(n[H##ESIZE(e)], m[H##ESIZE(e)]), mask); \ 360 } \ 361 mve_advance_vpt(env); \ 362 } 363 364 /* provide unsigned 2-op helpers for all sizes */ 365 #define DO_2OP_U(OP, FN) \ 366 DO_2OP(OP##b, 1, uint8_t, FN) \ 367 DO_2OP(OP##h, 2, uint16_t, FN) \ 368 DO_2OP(OP##w, 4, uint32_t, FN) 369 370 /* provide signed 2-op helpers for all sizes */ 371 #define DO_2OP_S(OP, FN) \ 372 DO_2OP(OP##b, 1, int8_t, FN) \ 373 DO_2OP(OP##h, 2, int16_t, FN) \ 374 DO_2OP(OP##w, 4, int32_t, FN) 375 376 /* 377 * "Long" operations where two half-sized inputs (taken from either the 378 * top or the bottom of the input vector) produce a double-width result. 379 * Here ESIZE, TYPE are for the input, and LESIZE, LTYPE for the output. 380 */ 381 #define DO_2OP_L(OP, TOP, ESIZE, TYPE, LESIZE, LTYPE, FN) \ 382 void HELPER(glue(mve_, OP))(CPUARMState *env, void *vd, void *vn, void *vm) \ 383 { \ 384 LTYPE *d = vd; \ 385 TYPE *n = vn, *m = vm; \ 386 uint16_t mask = mve_element_mask(env); \ 387 unsigned le; \ 388 for (le = 0; le < 16 / LESIZE; le++, mask >>= LESIZE) { \ 389 LTYPE r = FN((LTYPE)n[H##ESIZE(le * 2 + TOP)], \ 390 m[H##ESIZE(le * 2 + TOP)]); \ 391 mergemask(&d[H##LESIZE(le)], r, mask); \ 392 } \ 393 mve_advance_vpt(env); \ 394 } 395 396 #define DO_2OP_SAT(OP, ESIZE, TYPE, FN) \ 397 void HELPER(glue(mve_, OP))(CPUARMState *env, void *vd, void *vn, void *vm) \ 398 { \ 399 TYPE *d = vd, *n = vn, *m = vm; \ 400 uint16_t mask = mve_element_mask(env); \ 401 unsigned e; \ 402 bool qc = false; \ 403 for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE) { \ 404 bool sat = false; \ 405 TYPE r = FN(n[H##ESIZE(e)], m[H##ESIZE(e)], &sat); \ 406 mergemask(&d[H##ESIZE(e)], r, mask); \ 407 qc |= sat & mask & 1; \ 408 } \ 409 if (qc) { \ 410 env->vfp.qc[0] = qc; \ 411 } \ 412 mve_advance_vpt(env); \ 413 } 414 415 /* provide unsigned 2-op helpers for all sizes */ 416 #define DO_2OP_SAT_U(OP, FN) \ 417 DO_2OP_SAT(OP##b, 1, uint8_t, FN) \ 418 DO_2OP_SAT(OP##h, 2, uint16_t, FN) \ 419 DO_2OP_SAT(OP##w, 4, uint32_t, FN) 420 421 /* provide signed 2-op helpers for all sizes */ 422 #define DO_2OP_SAT_S(OP, FN) \ 423 DO_2OP_SAT(OP##b, 1, int8_t, FN) \ 424 DO_2OP_SAT(OP##h, 2, int16_t, FN) \ 425 DO_2OP_SAT(OP##w, 4, int32_t, FN) 426 427 #define DO_AND(N, M) ((N) & (M)) 428 #define DO_BIC(N, M) ((N) & ~(M)) 429 #define DO_ORR(N, M) ((N) | (M)) 430 #define DO_ORN(N, M) ((N) | ~(M)) 431 #define DO_EOR(N, M) ((N) ^ (M)) 432 433 DO_2OP(vand, 8, uint64_t, DO_AND) 434 DO_2OP(vbic, 8, uint64_t, DO_BIC) 435 DO_2OP(vorr, 8, uint64_t, DO_ORR) 436 DO_2OP(vorn, 8, uint64_t, DO_ORN) 437 DO_2OP(veor, 8, uint64_t, DO_EOR) 438 439 #define DO_ADD(N, M) ((N) + (M)) 440 #define DO_SUB(N, M) ((N) - (M)) 441 #define DO_MUL(N, M) ((N) * (M)) 442 443 DO_2OP_U(vadd, DO_ADD) 444 DO_2OP_U(vsub, DO_SUB) 445 DO_2OP_U(vmul, DO_MUL) 446 447 DO_2OP_L(vmullbsb, 0, 1, int8_t, 2, int16_t, DO_MUL) 448 DO_2OP_L(vmullbsh, 0, 2, int16_t, 4, int32_t, DO_MUL) 449 DO_2OP_L(vmullbsw, 0, 4, int32_t, 8, int64_t, DO_MUL) 450 DO_2OP_L(vmullbub, 0, 1, uint8_t, 2, uint16_t, DO_MUL) 451 DO_2OP_L(vmullbuh, 0, 2, uint16_t, 4, uint32_t, DO_MUL) 452 DO_2OP_L(vmullbuw, 0, 4, uint32_t, 8, uint64_t, DO_MUL) 453 454 DO_2OP_L(vmulltsb, 1, 1, int8_t, 2, int16_t, DO_MUL) 455 DO_2OP_L(vmulltsh, 1, 2, int16_t, 4, int32_t, DO_MUL) 456 DO_2OP_L(vmulltsw, 1, 4, int32_t, 8, int64_t, DO_MUL) 457 DO_2OP_L(vmulltub, 1, 1, uint8_t, 2, uint16_t, DO_MUL) 458 DO_2OP_L(vmulltuh, 1, 2, uint16_t, 4, uint32_t, DO_MUL) 459 DO_2OP_L(vmulltuw, 1, 4, uint32_t, 8, uint64_t, DO_MUL) 460 461 /* 462 * Because the computation type is at least twice as large as required, 463 * these work for both signed and unsigned source types. 464 */ 465 static inline uint8_t do_mulh_b(int32_t n, int32_t m) 466 { 467 return (n * m) >> 8; 468 } 469 470 static inline uint16_t do_mulh_h(int32_t n, int32_t m) 471 { 472 return (n * m) >> 16; 473 } 474 475 static inline uint32_t do_mulh_w(int64_t n, int64_t m) 476 { 477 return (n * m) >> 32; 478 } 479 480 static inline uint8_t do_rmulh_b(int32_t n, int32_t m) 481 { 482 return (n * m + (1U << 7)) >> 8; 483 } 484 485 static inline uint16_t do_rmulh_h(int32_t n, int32_t m) 486 { 487 return (n * m + (1U << 15)) >> 16; 488 } 489 490 static inline uint32_t do_rmulh_w(int64_t n, int64_t m) 491 { 492 return (n * m + (1U << 31)) >> 32; 493 } 494 495 DO_2OP(vmulhsb, 1, int8_t, do_mulh_b) 496 DO_2OP(vmulhsh, 2, int16_t, do_mulh_h) 497 DO_2OP(vmulhsw, 4, int32_t, do_mulh_w) 498 DO_2OP(vmulhub, 1, uint8_t, do_mulh_b) 499 DO_2OP(vmulhuh, 2, uint16_t, do_mulh_h) 500 DO_2OP(vmulhuw, 4, uint32_t, do_mulh_w) 501 502 DO_2OP(vrmulhsb, 1, int8_t, do_rmulh_b) 503 DO_2OP(vrmulhsh, 2, int16_t, do_rmulh_h) 504 DO_2OP(vrmulhsw, 4, int32_t, do_rmulh_w) 505 DO_2OP(vrmulhub, 1, uint8_t, do_rmulh_b) 506 DO_2OP(vrmulhuh, 2, uint16_t, do_rmulh_h) 507 DO_2OP(vrmulhuw, 4, uint32_t, do_rmulh_w) 508 509 #define DO_MAX(N, M) ((N) >= (M) ? (N) : (M)) 510 #define DO_MIN(N, M) ((N) >= (M) ? (M) : (N)) 511 512 DO_2OP_S(vmaxs, DO_MAX) 513 DO_2OP_U(vmaxu, DO_MAX) 514 DO_2OP_S(vmins, DO_MIN) 515 DO_2OP_U(vminu, DO_MIN) 516 517 #define DO_ABD(N, M) ((N) >= (M) ? (N) - (M) : (M) - (N)) 518 519 DO_2OP_S(vabds, DO_ABD) 520 DO_2OP_U(vabdu, DO_ABD) 521 522 static inline uint32_t do_vhadd_u(uint32_t n, uint32_t m) 523 { 524 return ((uint64_t)n + m) >> 1; 525 } 526 527 static inline int32_t do_vhadd_s(int32_t n, int32_t m) 528 { 529 return ((int64_t)n + m) >> 1; 530 } 531 532 static inline uint32_t do_vhsub_u(uint32_t n, uint32_t m) 533 { 534 return ((uint64_t)n - m) >> 1; 535 } 536 537 static inline int32_t do_vhsub_s(int32_t n, int32_t m) 538 { 539 return ((int64_t)n - m) >> 1; 540 } 541 542 DO_2OP_S(vhadds, do_vhadd_s) 543 DO_2OP_U(vhaddu, do_vhadd_u) 544 DO_2OP_S(vhsubs, do_vhsub_s) 545 DO_2OP_U(vhsubu, do_vhsub_u) 546 547 #define DO_VSHLS(N, M) do_sqrshl_bhs(N, (int8_t)(M), sizeof(N) * 8, false, NULL) 548 #define DO_VSHLU(N, M) do_uqrshl_bhs(N, (int8_t)(M), sizeof(N) * 8, false, NULL) 549 #define DO_VRSHLS(N, M) do_sqrshl_bhs(N, (int8_t)(M), sizeof(N) * 8, true, NULL) 550 #define DO_VRSHLU(N, M) do_uqrshl_bhs(N, (int8_t)(M), sizeof(N) * 8, true, NULL) 551 552 DO_2OP_S(vshls, DO_VSHLS) 553 DO_2OP_U(vshlu, DO_VSHLU) 554 DO_2OP_S(vrshls, DO_VRSHLS) 555 DO_2OP_U(vrshlu, DO_VRSHLU) 556 557 #define DO_RHADD_S(N, M) (((int64_t)(N) + (M) + 1) >> 1) 558 #define DO_RHADD_U(N, M) (((uint64_t)(N) + (M) + 1) >> 1) 559 560 DO_2OP_S(vrhadds, DO_RHADD_S) 561 DO_2OP_U(vrhaddu, DO_RHADD_U) 562 563 static void do_vadc(CPUARMState *env, uint32_t *d, uint32_t *n, uint32_t *m, 564 uint32_t inv, uint32_t carry_in, bool update_flags) 565 { 566 uint16_t mask = mve_element_mask(env); 567 unsigned e; 568 569 /* If any additions trigger, we will update flags. */ 570 if (mask & 0x1111) { 571 update_flags = true; 572 } 573 574 for (e = 0; e < 16 / 4; e++, mask >>= 4) { 575 uint64_t r = carry_in; 576 r += n[H4(e)]; 577 r += m[H4(e)] ^ inv; 578 if (mask & 1) { 579 carry_in = r >> 32; 580 } 581 mergemask(&d[H4(e)], r, mask); 582 } 583 584 if (update_flags) { 585 /* Store C, clear NZV. */ 586 env->vfp.xregs[ARM_VFP_FPSCR] &= ~FPCR_NZCV_MASK; 587 env->vfp.xregs[ARM_VFP_FPSCR] |= carry_in * FPCR_C; 588 } 589 mve_advance_vpt(env); 590 } 591 592 void HELPER(mve_vadc)(CPUARMState *env, void *vd, void *vn, void *vm) 593 { 594 bool carry_in = env->vfp.xregs[ARM_VFP_FPSCR] & FPCR_C; 595 do_vadc(env, vd, vn, vm, 0, carry_in, false); 596 } 597 598 void HELPER(mve_vsbc)(CPUARMState *env, void *vd, void *vn, void *vm) 599 { 600 bool carry_in = env->vfp.xregs[ARM_VFP_FPSCR] & FPCR_C; 601 do_vadc(env, vd, vn, vm, -1, carry_in, false); 602 } 603 604 605 void HELPER(mve_vadci)(CPUARMState *env, void *vd, void *vn, void *vm) 606 { 607 do_vadc(env, vd, vn, vm, 0, 0, true); 608 } 609 610 void HELPER(mve_vsbci)(CPUARMState *env, void *vd, void *vn, void *vm) 611 { 612 do_vadc(env, vd, vn, vm, -1, 1, true); 613 } 614 615 #define DO_VCADD(OP, ESIZE, TYPE, FN0, FN1) \ 616 void HELPER(glue(mve_, OP))(CPUARMState *env, void *vd, void *vn, void *vm) \ 617 { \ 618 TYPE *d = vd, *n = vn, *m = vm; \ 619 uint16_t mask = mve_element_mask(env); \ 620 unsigned e; \ 621 TYPE r[16 / ESIZE]; \ 622 /* Calculate all results first to avoid overwriting inputs */ \ 623 for (e = 0; e < 16 / ESIZE; e++) { \ 624 if (!(e & 1)) { \ 625 r[e] = FN0(n[H##ESIZE(e)], m[H##ESIZE(e + 1)]); \ 626 } else { \ 627 r[e] = FN1(n[H##ESIZE(e)], m[H##ESIZE(e - 1)]); \ 628 } \ 629 } \ 630 for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE) { \ 631 mergemask(&d[H##ESIZE(e)], r[e], mask); \ 632 } \ 633 mve_advance_vpt(env); \ 634 } 635 636 #define DO_VCADD_ALL(OP, FN0, FN1) \ 637 DO_VCADD(OP##b, 1, int8_t, FN0, FN1) \ 638 DO_VCADD(OP##h, 2, int16_t, FN0, FN1) \ 639 DO_VCADD(OP##w, 4, int32_t, FN0, FN1) 640 641 DO_VCADD_ALL(vcadd90, DO_SUB, DO_ADD) 642 DO_VCADD_ALL(vcadd270, DO_ADD, DO_SUB) 643 DO_VCADD_ALL(vhcadd90, do_vhsub_s, do_vhadd_s) 644 DO_VCADD_ALL(vhcadd270, do_vhadd_s, do_vhsub_s) 645 646 static inline int32_t do_sat_bhw(int64_t val, int64_t min, int64_t max, bool *s) 647 { 648 if (val > max) { 649 *s = true; 650 return max; 651 } else if (val < min) { 652 *s = true; 653 return min; 654 } 655 return val; 656 } 657 658 #define DO_SQADD_B(n, m, s) do_sat_bhw((int64_t)n + m, INT8_MIN, INT8_MAX, s) 659 #define DO_SQADD_H(n, m, s) do_sat_bhw((int64_t)n + m, INT16_MIN, INT16_MAX, s) 660 #define DO_SQADD_W(n, m, s) do_sat_bhw((int64_t)n + m, INT32_MIN, INT32_MAX, s) 661 662 #define DO_UQADD_B(n, m, s) do_sat_bhw((int64_t)n + m, 0, UINT8_MAX, s) 663 #define DO_UQADD_H(n, m, s) do_sat_bhw((int64_t)n + m, 0, UINT16_MAX, s) 664 #define DO_UQADD_W(n, m, s) do_sat_bhw((int64_t)n + m, 0, UINT32_MAX, s) 665 666 #define DO_SQSUB_B(n, m, s) do_sat_bhw((int64_t)n - m, INT8_MIN, INT8_MAX, s) 667 #define DO_SQSUB_H(n, m, s) do_sat_bhw((int64_t)n - m, INT16_MIN, INT16_MAX, s) 668 #define DO_SQSUB_W(n, m, s) do_sat_bhw((int64_t)n - m, INT32_MIN, INT32_MAX, s) 669 670 #define DO_UQSUB_B(n, m, s) do_sat_bhw((int64_t)n - m, 0, UINT8_MAX, s) 671 #define DO_UQSUB_H(n, m, s) do_sat_bhw((int64_t)n - m, 0, UINT16_MAX, s) 672 #define DO_UQSUB_W(n, m, s) do_sat_bhw((int64_t)n - m, 0, UINT32_MAX, s) 673 674 /* 675 * For QDMULH and QRDMULH we simplify "double and shift by esize" into 676 * "shift by esize-1", adjusting the QRDMULH rounding constant to match. 677 */ 678 #define DO_QDMULH_B(n, m, s) do_sat_bhw(((int64_t)n * m) >> 7, \ 679 INT8_MIN, INT8_MAX, s) 680 #define DO_QDMULH_H(n, m, s) do_sat_bhw(((int64_t)n * m) >> 15, \ 681 INT16_MIN, INT16_MAX, s) 682 #define DO_QDMULH_W(n, m, s) do_sat_bhw(((int64_t)n * m) >> 31, \ 683 INT32_MIN, INT32_MAX, s) 684 685 #define DO_QRDMULH_B(n, m, s) do_sat_bhw(((int64_t)n * m + (1 << 6)) >> 7, \ 686 INT8_MIN, INT8_MAX, s) 687 #define DO_QRDMULH_H(n, m, s) do_sat_bhw(((int64_t)n * m + (1 << 14)) >> 15, \ 688 INT16_MIN, INT16_MAX, s) 689 #define DO_QRDMULH_W(n, m, s) do_sat_bhw(((int64_t)n * m + (1 << 30)) >> 31, \ 690 INT32_MIN, INT32_MAX, s) 691 692 DO_2OP_SAT(vqdmulhb, 1, int8_t, DO_QDMULH_B) 693 DO_2OP_SAT(vqdmulhh, 2, int16_t, DO_QDMULH_H) 694 DO_2OP_SAT(vqdmulhw, 4, int32_t, DO_QDMULH_W) 695 696 DO_2OP_SAT(vqrdmulhb, 1, int8_t, DO_QRDMULH_B) 697 DO_2OP_SAT(vqrdmulhh, 2, int16_t, DO_QRDMULH_H) 698 DO_2OP_SAT(vqrdmulhw, 4, int32_t, DO_QRDMULH_W) 699 700 DO_2OP_SAT(vqaddub, 1, uint8_t, DO_UQADD_B) 701 DO_2OP_SAT(vqadduh, 2, uint16_t, DO_UQADD_H) 702 DO_2OP_SAT(vqadduw, 4, uint32_t, DO_UQADD_W) 703 DO_2OP_SAT(vqaddsb, 1, int8_t, DO_SQADD_B) 704 DO_2OP_SAT(vqaddsh, 2, int16_t, DO_SQADD_H) 705 DO_2OP_SAT(vqaddsw, 4, int32_t, DO_SQADD_W) 706 707 DO_2OP_SAT(vqsubub, 1, uint8_t, DO_UQSUB_B) 708 DO_2OP_SAT(vqsubuh, 2, uint16_t, DO_UQSUB_H) 709 DO_2OP_SAT(vqsubuw, 4, uint32_t, DO_UQSUB_W) 710 DO_2OP_SAT(vqsubsb, 1, int8_t, DO_SQSUB_B) 711 DO_2OP_SAT(vqsubsh, 2, int16_t, DO_SQSUB_H) 712 DO_2OP_SAT(vqsubsw, 4, int32_t, DO_SQSUB_W) 713 714 /* 715 * This wrapper fixes up the impedance mismatch between do_sqrshl_bhs() 716 * and friends wanting a uint32_t* sat and our needing a bool*. 717 */ 718 #define WRAP_QRSHL_HELPER(FN, N, M, ROUND, satp) \ 719 ({ \ 720 uint32_t su32 = 0; \ 721 typeof(N) r = FN(N, (int8_t)(M), sizeof(N) * 8, ROUND, &su32); \ 722 if (su32) { \ 723 *satp = true; \ 724 } \ 725 r; \ 726 }) 727 728 #define DO_SQSHL_OP(N, M, satp) \ 729 WRAP_QRSHL_HELPER(do_sqrshl_bhs, N, M, false, satp) 730 #define DO_UQSHL_OP(N, M, satp) \ 731 WRAP_QRSHL_HELPER(do_uqrshl_bhs, N, M, false, satp) 732 #define DO_SQRSHL_OP(N, M, satp) \ 733 WRAP_QRSHL_HELPER(do_sqrshl_bhs, N, M, true, satp) 734 #define DO_UQRSHL_OP(N, M, satp) \ 735 WRAP_QRSHL_HELPER(do_uqrshl_bhs, N, M, true, satp) 736 #define DO_SUQSHL_OP(N, M, satp) \ 737 WRAP_QRSHL_HELPER(do_suqrshl_bhs, N, M, false, satp) 738 739 DO_2OP_SAT_S(vqshls, DO_SQSHL_OP) 740 DO_2OP_SAT_U(vqshlu, DO_UQSHL_OP) 741 DO_2OP_SAT_S(vqrshls, DO_SQRSHL_OP) 742 DO_2OP_SAT_U(vqrshlu, DO_UQRSHL_OP) 743 744 /* 745 * Multiply add dual returning high half 746 * The 'FN' here takes four inputs A, B, C, D, a 0/1 indicator of 747 * whether to add the rounding constant, and the pointer to the 748 * saturation flag, and should do "(A * B + C * D) * 2 + rounding constant", 749 * saturate to twice the input size and return the high half; or 750 * (A * B - C * D) etc for VQDMLSDH. 751 */ 752 #define DO_VQDMLADH_OP(OP, ESIZE, TYPE, XCHG, ROUND, FN) \ 753 void HELPER(glue(mve_, OP))(CPUARMState *env, void *vd, void *vn, \ 754 void *vm) \ 755 { \ 756 TYPE *d = vd, *n = vn, *m = vm; \ 757 uint16_t mask = mve_element_mask(env); \ 758 unsigned e; \ 759 bool qc = false; \ 760 for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE) { \ 761 bool sat = false; \ 762 if ((e & 1) == XCHG) { \ 763 TYPE r = FN(n[H##ESIZE(e)], \ 764 m[H##ESIZE(e - XCHG)], \ 765 n[H##ESIZE(e + (1 - 2 * XCHG))], \ 766 m[H##ESIZE(e + (1 - XCHG))], \ 767 ROUND, &sat); \ 768 mergemask(&d[H##ESIZE(e)], r, mask); \ 769 qc |= sat & mask & 1; \ 770 } \ 771 } \ 772 if (qc) { \ 773 env->vfp.qc[0] = qc; \ 774 } \ 775 mve_advance_vpt(env); \ 776 } 777 778 static int8_t do_vqdmladh_b(int8_t a, int8_t b, int8_t c, int8_t d, 779 int round, bool *sat) 780 { 781 int64_t r = ((int64_t)a * b + (int64_t)c * d) * 2 + (round << 7); 782 return do_sat_bhw(r, INT16_MIN, INT16_MAX, sat) >> 8; 783 } 784 785 static int16_t do_vqdmladh_h(int16_t a, int16_t b, int16_t c, int16_t d, 786 int round, bool *sat) 787 { 788 int64_t r = ((int64_t)a * b + (int64_t)c * d) * 2 + (round << 15); 789 return do_sat_bhw(r, INT32_MIN, INT32_MAX, sat) >> 16; 790 } 791 792 static int32_t do_vqdmladh_w(int32_t a, int32_t b, int32_t c, int32_t d, 793 int round, bool *sat) 794 { 795 int64_t m1 = (int64_t)a * b; 796 int64_t m2 = (int64_t)c * d; 797 int64_t r; 798 /* 799 * Architecturally we should do the entire add, double, round 800 * and then check for saturation. We do three saturating adds, 801 * but we need to be careful about the order. If the first 802 * m1 + m2 saturates then it's impossible for the *2+rc to 803 * bring it back into the non-saturated range. However, if 804 * m1 + m2 is negative then it's possible that doing the doubling 805 * would take the intermediate result below INT64_MAX and the 806 * addition of the rounding constant then brings it back in range. 807 * So we add half the rounding constant before doubling rather 808 * than adding the rounding constant after the doubling. 809 */ 810 if (sadd64_overflow(m1, m2, &r) || 811 sadd64_overflow(r, (round << 30), &r) || 812 sadd64_overflow(r, r, &r)) { 813 *sat = true; 814 return r < 0 ? INT32_MAX : INT32_MIN; 815 } 816 return r >> 32; 817 } 818 819 static int8_t do_vqdmlsdh_b(int8_t a, int8_t b, int8_t c, int8_t d, 820 int round, bool *sat) 821 { 822 int64_t r = ((int64_t)a * b - (int64_t)c * d) * 2 + (round << 7); 823 return do_sat_bhw(r, INT16_MIN, INT16_MAX, sat) >> 8; 824 } 825 826 static int16_t do_vqdmlsdh_h(int16_t a, int16_t b, int16_t c, int16_t d, 827 int round, bool *sat) 828 { 829 int64_t r = ((int64_t)a * b - (int64_t)c * d) * 2 + (round << 15); 830 return do_sat_bhw(r, INT32_MIN, INT32_MAX, sat) >> 16; 831 } 832 833 static int32_t do_vqdmlsdh_w(int32_t a, int32_t b, int32_t c, int32_t d, 834 int round, bool *sat) 835 { 836 int64_t m1 = (int64_t)a * b; 837 int64_t m2 = (int64_t)c * d; 838 int64_t r; 839 /* The same ordering issue as in do_vqdmladh_w applies here too */ 840 if (ssub64_overflow(m1, m2, &r) || 841 sadd64_overflow(r, (round << 30), &r) || 842 sadd64_overflow(r, r, &r)) { 843 *sat = true; 844 return r < 0 ? INT32_MAX : INT32_MIN; 845 } 846 return r >> 32; 847 } 848 849 DO_VQDMLADH_OP(vqdmladhb, 1, int8_t, 0, 0, do_vqdmladh_b) 850 DO_VQDMLADH_OP(vqdmladhh, 2, int16_t, 0, 0, do_vqdmladh_h) 851 DO_VQDMLADH_OP(vqdmladhw, 4, int32_t, 0, 0, do_vqdmladh_w) 852 DO_VQDMLADH_OP(vqdmladhxb, 1, int8_t, 1, 0, do_vqdmladh_b) 853 DO_VQDMLADH_OP(vqdmladhxh, 2, int16_t, 1, 0, do_vqdmladh_h) 854 DO_VQDMLADH_OP(vqdmladhxw, 4, int32_t, 1, 0, do_vqdmladh_w) 855 856 DO_VQDMLADH_OP(vqrdmladhb, 1, int8_t, 0, 1, do_vqdmladh_b) 857 DO_VQDMLADH_OP(vqrdmladhh, 2, int16_t, 0, 1, do_vqdmladh_h) 858 DO_VQDMLADH_OP(vqrdmladhw, 4, int32_t, 0, 1, do_vqdmladh_w) 859 DO_VQDMLADH_OP(vqrdmladhxb, 1, int8_t, 1, 1, do_vqdmladh_b) 860 DO_VQDMLADH_OP(vqrdmladhxh, 2, int16_t, 1, 1, do_vqdmladh_h) 861 DO_VQDMLADH_OP(vqrdmladhxw, 4, int32_t, 1, 1, do_vqdmladh_w) 862 863 DO_VQDMLADH_OP(vqdmlsdhb, 1, int8_t, 0, 0, do_vqdmlsdh_b) 864 DO_VQDMLADH_OP(vqdmlsdhh, 2, int16_t, 0, 0, do_vqdmlsdh_h) 865 DO_VQDMLADH_OP(vqdmlsdhw, 4, int32_t, 0, 0, do_vqdmlsdh_w) 866 DO_VQDMLADH_OP(vqdmlsdhxb, 1, int8_t, 1, 0, do_vqdmlsdh_b) 867 DO_VQDMLADH_OP(vqdmlsdhxh, 2, int16_t, 1, 0, do_vqdmlsdh_h) 868 DO_VQDMLADH_OP(vqdmlsdhxw, 4, int32_t, 1, 0, do_vqdmlsdh_w) 869 870 DO_VQDMLADH_OP(vqrdmlsdhb, 1, int8_t, 0, 1, do_vqdmlsdh_b) 871 DO_VQDMLADH_OP(vqrdmlsdhh, 2, int16_t, 0, 1, do_vqdmlsdh_h) 872 DO_VQDMLADH_OP(vqrdmlsdhw, 4, int32_t, 0, 1, do_vqdmlsdh_w) 873 DO_VQDMLADH_OP(vqrdmlsdhxb, 1, int8_t, 1, 1, do_vqdmlsdh_b) 874 DO_VQDMLADH_OP(vqrdmlsdhxh, 2, int16_t, 1, 1, do_vqdmlsdh_h) 875 DO_VQDMLADH_OP(vqrdmlsdhxw, 4, int32_t, 1, 1, do_vqdmlsdh_w) 876 877 #define DO_2OP_SCALAR(OP, ESIZE, TYPE, FN) \ 878 void HELPER(glue(mve_, OP))(CPUARMState *env, void *vd, void *vn, \ 879 uint32_t rm) \ 880 { \ 881 TYPE *d = vd, *n = vn; \ 882 TYPE m = rm; \ 883 uint16_t mask = mve_element_mask(env); \ 884 unsigned e; \ 885 for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE) { \ 886 mergemask(&d[H##ESIZE(e)], FN(n[H##ESIZE(e)], m), mask); \ 887 } \ 888 mve_advance_vpt(env); \ 889 } 890 891 #define DO_2OP_SAT_SCALAR(OP, ESIZE, TYPE, FN) \ 892 void HELPER(glue(mve_, OP))(CPUARMState *env, void *vd, void *vn, \ 893 uint32_t rm) \ 894 { \ 895 TYPE *d = vd, *n = vn; \ 896 TYPE m = rm; \ 897 uint16_t mask = mve_element_mask(env); \ 898 unsigned e; \ 899 bool qc = false; \ 900 for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE) { \ 901 bool sat = false; \ 902 mergemask(&d[H##ESIZE(e)], FN(n[H##ESIZE(e)], m, &sat), \ 903 mask); \ 904 qc |= sat & mask & 1; \ 905 } \ 906 if (qc) { \ 907 env->vfp.qc[0] = qc; \ 908 } \ 909 mve_advance_vpt(env); \ 910 } 911 912 /* provide unsigned 2-op scalar helpers for all sizes */ 913 #define DO_2OP_SCALAR_U(OP, FN) \ 914 DO_2OP_SCALAR(OP##b, 1, uint8_t, FN) \ 915 DO_2OP_SCALAR(OP##h, 2, uint16_t, FN) \ 916 DO_2OP_SCALAR(OP##w, 4, uint32_t, FN) 917 #define DO_2OP_SCALAR_S(OP, FN) \ 918 DO_2OP_SCALAR(OP##b, 1, int8_t, FN) \ 919 DO_2OP_SCALAR(OP##h, 2, int16_t, FN) \ 920 DO_2OP_SCALAR(OP##w, 4, int32_t, FN) 921 922 DO_2OP_SCALAR_U(vadd_scalar, DO_ADD) 923 DO_2OP_SCALAR_U(vsub_scalar, DO_SUB) 924 DO_2OP_SCALAR_U(vmul_scalar, DO_MUL) 925 DO_2OP_SCALAR_S(vhadds_scalar, do_vhadd_s) 926 DO_2OP_SCALAR_U(vhaddu_scalar, do_vhadd_u) 927 DO_2OP_SCALAR_S(vhsubs_scalar, do_vhsub_s) 928 DO_2OP_SCALAR_U(vhsubu_scalar, do_vhsub_u) 929 930 DO_2OP_SAT_SCALAR(vqaddu_scalarb, 1, uint8_t, DO_UQADD_B) 931 DO_2OP_SAT_SCALAR(vqaddu_scalarh, 2, uint16_t, DO_UQADD_H) 932 DO_2OP_SAT_SCALAR(vqaddu_scalarw, 4, uint32_t, DO_UQADD_W) 933 DO_2OP_SAT_SCALAR(vqadds_scalarb, 1, int8_t, DO_SQADD_B) 934 DO_2OP_SAT_SCALAR(vqadds_scalarh, 2, int16_t, DO_SQADD_H) 935 DO_2OP_SAT_SCALAR(vqadds_scalarw, 4, int32_t, DO_SQADD_W) 936 937 DO_2OP_SAT_SCALAR(vqsubu_scalarb, 1, uint8_t, DO_UQSUB_B) 938 DO_2OP_SAT_SCALAR(vqsubu_scalarh, 2, uint16_t, DO_UQSUB_H) 939 DO_2OP_SAT_SCALAR(vqsubu_scalarw, 4, uint32_t, DO_UQSUB_W) 940 DO_2OP_SAT_SCALAR(vqsubs_scalarb, 1, int8_t, DO_SQSUB_B) 941 DO_2OP_SAT_SCALAR(vqsubs_scalarh, 2, int16_t, DO_SQSUB_H) 942 DO_2OP_SAT_SCALAR(vqsubs_scalarw, 4, int32_t, DO_SQSUB_W) 943 944 DO_2OP_SAT_SCALAR(vqdmulh_scalarb, 1, int8_t, DO_QDMULH_B) 945 DO_2OP_SAT_SCALAR(vqdmulh_scalarh, 2, int16_t, DO_QDMULH_H) 946 DO_2OP_SAT_SCALAR(vqdmulh_scalarw, 4, int32_t, DO_QDMULH_W) 947 DO_2OP_SAT_SCALAR(vqrdmulh_scalarb, 1, int8_t, DO_QRDMULH_B) 948 DO_2OP_SAT_SCALAR(vqrdmulh_scalarh, 2, int16_t, DO_QRDMULH_H) 949 DO_2OP_SAT_SCALAR(vqrdmulh_scalarw, 4, int32_t, DO_QRDMULH_W) 950 951 /* 952 * Long saturating scalar ops. As with DO_2OP_L, TYPE and H are for the 953 * input (smaller) type and LESIZE, LTYPE, LH for the output (long) type. 954 * SATMASK specifies which bits of the predicate mask matter for determining 955 * whether to propagate a saturation indication into FPSCR.QC -- for 956 * the 16x16->32 case we must check only the bit corresponding to the T or B 957 * half that we used, but for the 32x32->64 case we propagate if the mask 958 * bit is set for either half. 959 */ 960 #define DO_2OP_SAT_SCALAR_L(OP, TOP, ESIZE, TYPE, LESIZE, LTYPE, FN, SATMASK) \ 961 void HELPER(glue(mve_, OP))(CPUARMState *env, void *vd, void *vn, \ 962 uint32_t rm) \ 963 { \ 964 LTYPE *d = vd; \ 965 TYPE *n = vn; \ 966 TYPE m = rm; \ 967 uint16_t mask = mve_element_mask(env); \ 968 unsigned le; \ 969 bool qc = false; \ 970 for (le = 0; le < 16 / LESIZE; le++, mask >>= LESIZE) { \ 971 bool sat = false; \ 972 LTYPE r = FN((LTYPE)n[H##ESIZE(le * 2 + TOP)], m, &sat); \ 973 mergemask(&d[H##LESIZE(le)], r, mask); \ 974 qc |= sat && (mask & SATMASK); \ 975 } \ 976 if (qc) { \ 977 env->vfp.qc[0] = qc; \ 978 } \ 979 mve_advance_vpt(env); \ 980 } 981 982 static inline int32_t do_qdmullh(int16_t n, int16_t m, bool *sat) 983 { 984 int64_t r = ((int64_t)n * m) * 2; 985 return do_sat_bhw(r, INT32_MIN, INT32_MAX, sat); 986 } 987 988 static inline int64_t do_qdmullw(int32_t n, int32_t m, bool *sat) 989 { 990 /* The multiply can't overflow, but the doubling might */ 991 int64_t r = (int64_t)n * m; 992 if (r > INT64_MAX / 2) { 993 *sat = true; 994 return INT64_MAX; 995 } else if (r < INT64_MIN / 2) { 996 *sat = true; 997 return INT64_MIN; 998 } else { 999 return r * 2; 1000 } 1001 } 1002 1003 #define SATMASK16B 1 1004 #define SATMASK16T (1 << 2) 1005 #define SATMASK32 ((1 << 4) | 1) 1006 1007 DO_2OP_SAT_SCALAR_L(vqdmullb_scalarh, 0, 2, int16_t, 4, int32_t, \ 1008 do_qdmullh, SATMASK16B) 1009 DO_2OP_SAT_SCALAR_L(vqdmullb_scalarw, 0, 4, int32_t, 8, int64_t, \ 1010 do_qdmullw, SATMASK32) 1011 DO_2OP_SAT_SCALAR_L(vqdmullt_scalarh, 1, 2, int16_t, 4, int32_t, \ 1012 do_qdmullh, SATMASK16T) 1013 DO_2OP_SAT_SCALAR_L(vqdmullt_scalarw, 1, 4, int32_t, 8, int64_t, \ 1014 do_qdmullw, SATMASK32) 1015 1016 /* 1017 * Long saturating ops 1018 */ 1019 #define DO_2OP_SAT_L(OP, TOP, ESIZE, TYPE, LESIZE, LTYPE, FN, SATMASK) \ 1020 void HELPER(glue(mve_, OP))(CPUARMState *env, void *vd, void *vn, \ 1021 void *vm) \ 1022 { \ 1023 LTYPE *d = vd; \ 1024 TYPE *n = vn, *m = vm; \ 1025 uint16_t mask = mve_element_mask(env); \ 1026 unsigned le; \ 1027 bool qc = false; \ 1028 for (le = 0; le < 16 / LESIZE; le++, mask >>= LESIZE) { \ 1029 bool sat = false; \ 1030 LTYPE op1 = n[H##ESIZE(le * 2 + TOP)]; \ 1031 LTYPE op2 = m[H##ESIZE(le * 2 + TOP)]; \ 1032 mergemask(&d[H##LESIZE(le)], FN(op1, op2, &sat), mask); \ 1033 qc |= sat && (mask & SATMASK); \ 1034 } \ 1035 if (qc) { \ 1036 env->vfp.qc[0] = qc; \ 1037 } \ 1038 mve_advance_vpt(env); \ 1039 } 1040 1041 DO_2OP_SAT_L(vqdmullbh, 0, 2, int16_t, 4, int32_t, do_qdmullh, SATMASK16B) 1042 DO_2OP_SAT_L(vqdmullbw, 0, 4, int32_t, 8, int64_t, do_qdmullw, SATMASK32) 1043 DO_2OP_SAT_L(vqdmullth, 1, 2, int16_t, 4, int32_t, do_qdmullh, SATMASK16T) 1044 DO_2OP_SAT_L(vqdmulltw, 1, 4, int32_t, 8, int64_t, do_qdmullw, SATMASK32) 1045 1046 static inline uint32_t do_vbrsrb(uint32_t n, uint32_t m) 1047 { 1048 m &= 0xff; 1049 if (m == 0) { 1050 return 0; 1051 } 1052 n = revbit8(n); 1053 if (m < 8) { 1054 n >>= 8 - m; 1055 } 1056 return n; 1057 } 1058 1059 static inline uint32_t do_vbrsrh(uint32_t n, uint32_t m) 1060 { 1061 m &= 0xff; 1062 if (m == 0) { 1063 return 0; 1064 } 1065 n = revbit16(n); 1066 if (m < 16) { 1067 n >>= 16 - m; 1068 } 1069 return n; 1070 } 1071 1072 static inline uint32_t do_vbrsrw(uint32_t n, uint32_t m) 1073 { 1074 m &= 0xff; 1075 if (m == 0) { 1076 return 0; 1077 } 1078 n = revbit32(n); 1079 if (m < 32) { 1080 n >>= 32 - m; 1081 } 1082 return n; 1083 } 1084 1085 DO_2OP_SCALAR(vbrsrb, 1, uint8_t, do_vbrsrb) 1086 DO_2OP_SCALAR(vbrsrh, 2, uint16_t, do_vbrsrh) 1087 DO_2OP_SCALAR(vbrsrw, 4, uint32_t, do_vbrsrw) 1088 1089 /* 1090 * Multiply add long dual accumulate ops. 1091 */ 1092 #define DO_LDAV(OP, ESIZE, TYPE, XCHG, EVENACC, ODDACC) \ 1093 uint64_t HELPER(glue(mve_, OP))(CPUARMState *env, void *vn, \ 1094 void *vm, uint64_t a) \ 1095 { \ 1096 uint16_t mask = mve_element_mask(env); \ 1097 unsigned e; \ 1098 TYPE *n = vn, *m = vm; \ 1099 for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE) { \ 1100 if (mask & 1) { \ 1101 if (e & 1) { \ 1102 a ODDACC \ 1103 (int64_t)n[H##ESIZE(e - 1 * XCHG)] * m[H##ESIZE(e)]; \ 1104 } else { \ 1105 a EVENACC \ 1106 (int64_t)n[H##ESIZE(e + 1 * XCHG)] * m[H##ESIZE(e)]; \ 1107 } \ 1108 } \ 1109 } \ 1110 mve_advance_vpt(env); \ 1111 return a; \ 1112 } 1113 1114 DO_LDAV(vmlaldavsh, 2, int16_t, false, +=, +=) 1115 DO_LDAV(vmlaldavxsh, 2, int16_t, true, +=, +=) 1116 DO_LDAV(vmlaldavsw, 4, int32_t, false, +=, +=) 1117 DO_LDAV(vmlaldavxsw, 4, int32_t, true, +=, +=) 1118 1119 DO_LDAV(vmlaldavuh, 2, uint16_t, false, +=, +=) 1120 DO_LDAV(vmlaldavuw, 4, uint32_t, false, +=, +=) 1121 1122 DO_LDAV(vmlsldavsh, 2, int16_t, false, +=, -=) 1123 DO_LDAV(vmlsldavxsh, 2, int16_t, true, +=, -=) 1124 DO_LDAV(vmlsldavsw, 4, int32_t, false, +=, -=) 1125 DO_LDAV(vmlsldavxsw, 4, int32_t, true, +=, -=) 1126 1127 /* 1128 * Rounding multiply add long dual accumulate high. In the pseudocode 1129 * this is implemented with a 72-bit internal accumulator value of which 1130 * the top 64 bits are returned. We optimize this to avoid having to 1131 * use 128-bit arithmetic -- we can do this because the 74-bit accumulator 1132 * is squashed back into 64-bits after each beat. 1133 */ 1134 #define DO_LDAVH(OP, TYPE, LTYPE, XCHG, SUB) \ 1135 uint64_t HELPER(glue(mve_, OP))(CPUARMState *env, void *vn, \ 1136 void *vm, uint64_t a) \ 1137 { \ 1138 uint16_t mask = mve_element_mask(env); \ 1139 unsigned e; \ 1140 TYPE *n = vn, *m = vm; \ 1141 for (e = 0; e < 16 / 4; e++, mask >>= 4) { \ 1142 if (mask & 1) { \ 1143 LTYPE mul; \ 1144 if (e & 1) { \ 1145 mul = (LTYPE)n[H4(e - 1 * XCHG)] * m[H4(e)]; \ 1146 if (SUB) { \ 1147 mul = -mul; \ 1148 } \ 1149 } else { \ 1150 mul = (LTYPE)n[H4(e + 1 * XCHG)] * m[H4(e)]; \ 1151 } \ 1152 mul = (mul >> 8) + ((mul >> 7) & 1); \ 1153 a += mul; \ 1154 } \ 1155 } \ 1156 mve_advance_vpt(env); \ 1157 return a; \ 1158 } 1159 1160 DO_LDAVH(vrmlaldavhsw, int32_t, int64_t, false, false) 1161 DO_LDAVH(vrmlaldavhxsw, int32_t, int64_t, true, false) 1162 1163 DO_LDAVH(vrmlaldavhuw, uint32_t, uint64_t, false, false) 1164 1165 DO_LDAVH(vrmlsldavhsw, int32_t, int64_t, false, true) 1166 DO_LDAVH(vrmlsldavhxsw, int32_t, int64_t, true, true) 1167 1168 /* Vector add across vector */ 1169 #define DO_VADDV(OP, ESIZE, TYPE) \ 1170 uint32_t HELPER(glue(mve_, OP))(CPUARMState *env, void *vm, \ 1171 uint32_t ra) \ 1172 { \ 1173 uint16_t mask = mve_element_mask(env); \ 1174 unsigned e; \ 1175 TYPE *m = vm; \ 1176 for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE) { \ 1177 if (mask & 1) { \ 1178 ra += m[H##ESIZE(e)]; \ 1179 } \ 1180 } \ 1181 mve_advance_vpt(env); \ 1182 return ra; \ 1183 } \ 1184 1185 DO_VADDV(vaddvsb, 1, uint8_t) 1186 DO_VADDV(vaddvsh, 2, uint16_t) 1187 DO_VADDV(vaddvsw, 4, uint32_t) 1188 DO_VADDV(vaddvub, 1, uint8_t) 1189 DO_VADDV(vaddvuh, 2, uint16_t) 1190 DO_VADDV(vaddvuw, 4, uint32_t) 1191 1192 #define DO_VADDLV(OP, TYPE, LTYPE) \ 1193 uint64_t HELPER(glue(mve_, OP))(CPUARMState *env, void *vm, \ 1194 uint64_t ra) \ 1195 { \ 1196 uint16_t mask = mve_element_mask(env); \ 1197 unsigned e; \ 1198 TYPE *m = vm; \ 1199 for (e = 0; e < 16 / 4; e++, mask >>= 4) { \ 1200 if (mask & 1) { \ 1201 ra += (LTYPE)m[H4(e)]; \ 1202 } \ 1203 } \ 1204 mve_advance_vpt(env); \ 1205 return ra; \ 1206 } \ 1207 1208 DO_VADDLV(vaddlv_s, int32_t, int64_t) 1209 DO_VADDLV(vaddlv_u, uint32_t, uint64_t) 1210 1211 /* Shifts by immediate */ 1212 #define DO_2SHIFT(OP, ESIZE, TYPE, FN) \ 1213 void HELPER(glue(mve_, OP))(CPUARMState *env, void *vd, \ 1214 void *vm, uint32_t shift) \ 1215 { \ 1216 TYPE *d = vd, *m = vm; \ 1217 uint16_t mask = mve_element_mask(env); \ 1218 unsigned e; \ 1219 for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE) { \ 1220 mergemask(&d[H##ESIZE(e)], \ 1221 FN(m[H##ESIZE(e)], shift), mask); \ 1222 } \ 1223 mve_advance_vpt(env); \ 1224 } 1225 1226 #define DO_2SHIFT_SAT(OP, ESIZE, TYPE, FN) \ 1227 void HELPER(glue(mve_, OP))(CPUARMState *env, void *vd, \ 1228 void *vm, uint32_t shift) \ 1229 { \ 1230 TYPE *d = vd, *m = vm; \ 1231 uint16_t mask = mve_element_mask(env); \ 1232 unsigned e; \ 1233 bool qc = false; \ 1234 for (e = 0; e < 16 / ESIZE; e++, mask >>= ESIZE) { \ 1235 bool sat = false; \ 1236 mergemask(&d[H##ESIZE(e)], \ 1237 FN(m[H##ESIZE(e)], shift, &sat), mask); \ 1238 qc |= sat & mask & 1; \ 1239 } \ 1240 if (qc) { \ 1241 env->vfp.qc[0] = qc; \ 1242 } \ 1243 mve_advance_vpt(env); \ 1244 } 1245 1246 /* provide unsigned 2-op shift helpers for all sizes */ 1247 #define DO_2SHIFT_U(OP, FN) \ 1248 DO_2SHIFT(OP##b, 1, uint8_t, FN) \ 1249 DO_2SHIFT(OP##h, 2, uint16_t, FN) \ 1250 DO_2SHIFT(OP##w, 4, uint32_t, FN) 1251 #define DO_2SHIFT_S(OP, FN) \ 1252 DO_2SHIFT(OP##b, 1, int8_t, FN) \ 1253 DO_2SHIFT(OP##h, 2, int16_t, FN) \ 1254 DO_2SHIFT(OP##w, 4, int32_t, FN) 1255 1256 #define DO_2SHIFT_SAT_U(OP, FN) \ 1257 DO_2SHIFT_SAT(OP##b, 1, uint8_t, FN) \ 1258 DO_2SHIFT_SAT(OP##h, 2, uint16_t, FN) \ 1259 DO_2SHIFT_SAT(OP##w, 4, uint32_t, FN) 1260 #define DO_2SHIFT_SAT_S(OP, FN) \ 1261 DO_2SHIFT_SAT(OP##b, 1, int8_t, FN) \ 1262 DO_2SHIFT_SAT(OP##h, 2, int16_t, FN) \ 1263 DO_2SHIFT_SAT(OP##w, 4, int32_t, FN) 1264 1265 DO_2SHIFT_U(vshli_u, DO_VSHLU) 1266 DO_2SHIFT_S(vshli_s, DO_VSHLS) 1267 DO_2SHIFT_SAT_U(vqshli_u, DO_UQSHL_OP) 1268 DO_2SHIFT_SAT_S(vqshli_s, DO_SQSHL_OP) 1269 DO_2SHIFT_SAT_S(vqshlui_s, DO_SUQSHL_OP) 1270 DO_2SHIFT_U(vrshli_u, DO_VRSHLU) 1271 DO_2SHIFT_S(vrshli_s, DO_VRSHLS) 1272 1273 /* Shift-and-insert; we always work with 64 bits at a time */ 1274 #define DO_2SHIFT_INSERT(OP, ESIZE, SHIFTFN, MASKFN) \ 1275 void HELPER(glue(mve_, OP))(CPUARMState *env, void *vd, \ 1276 void *vm, uint32_t shift) \ 1277 { \ 1278 uint64_t *d = vd, *m = vm; \ 1279 uint16_t mask; \ 1280 uint64_t shiftmask; \ 1281 unsigned e; \ 1282 if (shift == 0 || shift == ESIZE * 8) { \ 1283 /* \ 1284 * Only VSLI can shift by 0; only VSRI can shift by <dt>. \ 1285 * The generic logic would give the right answer for 0 but \ 1286 * fails for <dt>. \ 1287 */ \ 1288 goto done; \ 1289 } \ 1290 assert(shift < ESIZE * 8); \ 1291 mask = mve_element_mask(env); \ 1292 /* ESIZE / 2 gives the MO_* value if ESIZE is in [1,2,4] */ \ 1293 shiftmask = dup_const(ESIZE / 2, MASKFN(ESIZE * 8, shift)); \ 1294 for (e = 0; e < 16 / 8; e++, mask >>= 8) { \ 1295 uint64_t r = (SHIFTFN(m[H8(e)], shift) & shiftmask) | \ 1296 (d[H8(e)] & ~shiftmask); \ 1297 mergemask(&d[H8(e)], r, mask); \ 1298 } \ 1299 done: \ 1300 mve_advance_vpt(env); \ 1301 } 1302 1303 #define DO_SHL(N, SHIFT) ((N) << (SHIFT)) 1304 #define DO_SHR(N, SHIFT) ((N) >> (SHIFT)) 1305 #define SHL_MASK(EBITS, SHIFT) MAKE_64BIT_MASK((SHIFT), (EBITS) - (SHIFT)) 1306 #define SHR_MASK(EBITS, SHIFT) MAKE_64BIT_MASK(0, (EBITS) - (SHIFT)) 1307 1308 DO_2SHIFT_INSERT(vsrib, 1, DO_SHR, SHR_MASK) 1309 DO_2SHIFT_INSERT(vsrih, 2, DO_SHR, SHR_MASK) 1310 DO_2SHIFT_INSERT(vsriw, 4, DO_SHR, SHR_MASK) 1311 DO_2SHIFT_INSERT(vslib, 1, DO_SHL, SHL_MASK) 1312 DO_2SHIFT_INSERT(vslih, 2, DO_SHL, SHL_MASK) 1313 DO_2SHIFT_INSERT(vsliw, 4, DO_SHL, SHL_MASK) 1314 1315 /* 1316 * Long shifts taking half-sized inputs from top or bottom of the input 1317 * vector and producing a double-width result. ESIZE, TYPE are for 1318 * the input, and LESIZE, LTYPE for the output. 1319 * Unlike the normal shift helpers, we do not handle negative shift counts, 1320 * because the long shift is strictly left-only. 1321 */ 1322 #define DO_VSHLL(OP, TOP, ESIZE, TYPE, LESIZE, LTYPE) \ 1323 void HELPER(glue(mve_, OP))(CPUARMState *env, void *vd, \ 1324 void *vm, uint32_t shift) \ 1325 { \ 1326 LTYPE *d = vd; \ 1327 TYPE *m = vm; \ 1328 uint16_t mask = mve_element_mask(env); \ 1329 unsigned le; \ 1330 assert(shift <= 16); \ 1331 for (le = 0; le < 16 / LESIZE; le++, mask >>= LESIZE) { \ 1332 LTYPE r = (LTYPE)m[H##ESIZE(le * 2 + TOP)] << shift; \ 1333 mergemask(&d[H##LESIZE(le)], r, mask); \ 1334 } \ 1335 mve_advance_vpt(env); \ 1336 } 1337 1338 #define DO_VSHLL_ALL(OP, TOP) \ 1339 DO_VSHLL(OP##sb, TOP, 1, int8_t, 2, int16_t) \ 1340 DO_VSHLL(OP##ub, TOP, 1, uint8_t, 2, uint16_t) \ 1341 DO_VSHLL(OP##sh, TOP, 2, int16_t, 4, int32_t) \ 1342 DO_VSHLL(OP##uh, TOP, 2, uint16_t, 4, uint32_t) \ 1343 1344 DO_VSHLL_ALL(vshllb, false) 1345 DO_VSHLL_ALL(vshllt, true) 1346 1347 /* 1348 * Narrowing right shifts, taking a double sized input, shifting it 1349 * and putting the result in either the top or bottom half of the output. 1350 * ESIZE, TYPE are the output, and LESIZE, LTYPE the input. 1351 */ 1352 #define DO_VSHRN(OP, TOP, ESIZE, TYPE, LESIZE, LTYPE, FN) \ 1353 void HELPER(glue(mve_, OP))(CPUARMState *env, void *vd, \ 1354 void *vm, uint32_t shift) \ 1355 { \ 1356 LTYPE *m = vm; \ 1357 TYPE *d = vd; \ 1358 uint16_t mask = mve_element_mask(env); \ 1359 unsigned le; \ 1360 for (le = 0; le < 16 / LESIZE; le++, mask >>= LESIZE) { \ 1361 TYPE r = FN(m[H##LESIZE(le)], shift); \ 1362 mergemask(&d[H##ESIZE(le * 2 + TOP)], r, mask); \ 1363 } \ 1364 mve_advance_vpt(env); \ 1365 } 1366 1367 #define DO_VSHRN_ALL(OP, FN) \ 1368 DO_VSHRN(OP##bb, false, 1, uint8_t, 2, uint16_t, FN) \ 1369 DO_VSHRN(OP##bh, false, 2, uint16_t, 4, uint32_t, FN) \ 1370 DO_VSHRN(OP##tb, true, 1, uint8_t, 2, uint16_t, FN) \ 1371 DO_VSHRN(OP##th, true, 2, uint16_t, 4, uint32_t, FN) 1372 1373 static inline uint64_t do_urshr(uint64_t x, unsigned sh) 1374 { 1375 if (likely(sh < 64)) { 1376 return (x >> sh) + ((x >> (sh - 1)) & 1); 1377 } else if (sh == 64) { 1378 return x >> 63; 1379 } else { 1380 return 0; 1381 } 1382 } 1383 1384 static inline int64_t do_srshr(int64_t x, unsigned sh) 1385 { 1386 if (likely(sh < 64)) { 1387 return (x >> sh) + ((x >> (sh - 1)) & 1); 1388 } else { 1389 /* Rounding the sign bit always produces 0. */ 1390 return 0; 1391 } 1392 } 1393 1394 DO_VSHRN_ALL(vshrn, DO_SHR) 1395 DO_VSHRN_ALL(vrshrn, do_urshr) 1396 1397 static inline int32_t do_sat_bhs(int64_t val, int64_t min, int64_t max, 1398 bool *satp) 1399 { 1400 if (val > max) { 1401 *satp = true; 1402 return max; 1403 } else if (val < min) { 1404 *satp = true; 1405 return min; 1406 } else { 1407 return val; 1408 } 1409 } 1410 1411 /* Saturating narrowing right shifts */ 1412 #define DO_VSHRN_SAT(OP, TOP, ESIZE, TYPE, LESIZE, LTYPE, FN) \ 1413 void HELPER(glue(mve_, OP))(CPUARMState *env, void *vd, \ 1414 void *vm, uint32_t shift) \ 1415 { \ 1416 LTYPE *m = vm; \ 1417 TYPE *d = vd; \ 1418 uint16_t mask = mve_element_mask(env); \ 1419 bool qc = false; \ 1420 unsigned le; \ 1421 for (le = 0; le < 16 / LESIZE; le++, mask >>= LESIZE) { \ 1422 bool sat = false; \ 1423 TYPE r = FN(m[H##LESIZE(le)], shift, &sat); \ 1424 mergemask(&d[H##ESIZE(le * 2 + TOP)], r, mask); \ 1425 qc |= sat && (mask & 1 << (TOP * ESIZE)); \ 1426 } \ 1427 if (qc) { \ 1428 env->vfp.qc[0] = qc; \ 1429 } \ 1430 mve_advance_vpt(env); \ 1431 } 1432 1433 #define DO_VSHRN_SAT_UB(BOP, TOP, FN) \ 1434 DO_VSHRN_SAT(BOP, false, 1, uint8_t, 2, uint16_t, FN) \ 1435 DO_VSHRN_SAT(TOP, true, 1, uint8_t, 2, uint16_t, FN) 1436 1437 #define DO_VSHRN_SAT_UH(BOP, TOP, FN) \ 1438 DO_VSHRN_SAT(BOP, false, 2, uint16_t, 4, uint32_t, FN) \ 1439 DO_VSHRN_SAT(TOP, true, 2, uint16_t, 4, uint32_t, FN) 1440 1441 #define DO_VSHRN_SAT_SB(BOP, TOP, FN) \ 1442 DO_VSHRN_SAT(BOP, false, 1, int8_t, 2, int16_t, FN) \ 1443 DO_VSHRN_SAT(TOP, true, 1, int8_t, 2, int16_t, FN) 1444 1445 #define DO_VSHRN_SAT_SH(BOP, TOP, FN) \ 1446 DO_VSHRN_SAT(BOP, false, 2, int16_t, 4, int32_t, FN) \ 1447 DO_VSHRN_SAT(TOP, true, 2, int16_t, 4, int32_t, FN) 1448 1449 #define DO_SHRN_SB(N, M, SATP) \ 1450 do_sat_bhs((int64_t)(N) >> (M), INT8_MIN, INT8_MAX, SATP) 1451 #define DO_SHRN_UB(N, M, SATP) \ 1452 do_sat_bhs((uint64_t)(N) >> (M), 0, UINT8_MAX, SATP) 1453 #define DO_SHRUN_B(N, M, SATP) \ 1454 do_sat_bhs((int64_t)(N) >> (M), 0, UINT8_MAX, SATP) 1455 1456 #define DO_SHRN_SH(N, M, SATP) \ 1457 do_sat_bhs((int64_t)(N) >> (M), INT16_MIN, INT16_MAX, SATP) 1458 #define DO_SHRN_UH(N, M, SATP) \ 1459 do_sat_bhs((uint64_t)(N) >> (M), 0, UINT16_MAX, SATP) 1460 #define DO_SHRUN_H(N, M, SATP) \ 1461 do_sat_bhs((int64_t)(N) >> (M), 0, UINT16_MAX, SATP) 1462 1463 #define DO_RSHRN_SB(N, M, SATP) \ 1464 do_sat_bhs(do_srshr(N, M), INT8_MIN, INT8_MAX, SATP) 1465 #define DO_RSHRN_UB(N, M, SATP) \ 1466 do_sat_bhs(do_urshr(N, M), 0, UINT8_MAX, SATP) 1467 #define DO_RSHRUN_B(N, M, SATP) \ 1468 do_sat_bhs(do_srshr(N, M), 0, UINT8_MAX, SATP) 1469 1470 #define DO_RSHRN_SH(N, M, SATP) \ 1471 do_sat_bhs(do_srshr(N, M), INT16_MIN, INT16_MAX, SATP) 1472 #define DO_RSHRN_UH(N, M, SATP) \ 1473 do_sat_bhs(do_urshr(N, M), 0, UINT16_MAX, SATP) 1474 #define DO_RSHRUN_H(N, M, SATP) \ 1475 do_sat_bhs(do_srshr(N, M), 0, UINT16_MAX, SATP) 1476 1477 DO_VSHRN_SAT_SB(vqshrnb_sb, vqshrnt_sb, DO_SHRN_SB) 1478 DO_VSHRN_SAT_SH(vqshrnb_sh, vqshrnt_sh, DO_SHRN_SH) 1479 DO_VSHRN_SAT_UB(vqshrnb_ub, vqshrnt_ub, DO_SHRN_UB) 1480 DO_VSHRN_SAT_UH(vqshrnb_uh, vqshrnt_uh, DO_SHRN_UH) 1481 DO_VSHRN_SAT_SB(vqshrunbb, vqshruntb, DO_SHRUN_B) 1482 DO_VSHRN_SAT_SH(vqshrunbh, vqshrunth, DO_SHRUN_H) 1483 1484 DO_VSHRN_SAT_SB(vqrshrnb_sb, vqrshrnt_sb, DO_RSHRN_SB) 1485 DO_VSHRN_SAT_SH(vqrshrnb_sh, vqrshrnt_sh, DO_RSHRN_SH) 1486 DO_VSHRN_SAT_UB(vqrshrnb_ub, vqrshrnt_ub, DO_RSHRN_UB) 1487 DO_VSHRN_SAT_UH(vqrshrnb_uh, vqrshrnt_uh, DO_RSHRN_UH) 1488 DO_VSHRN_SAT_SB(vqrshrunbb, vqrshruntb, DO_RSHRUN_B) 1489 DO_VSHRN_SAT_SH(vqrshrunbh, vqrshrunth, DO_RSHRUN_H) 1490 1491 uint32_t HELPER(mve_vshlc)(CPUARMState *env, void *vd, uint32_t rdm, 1492 uint32_t shift) 1493 { 1494 uint32_t *d = vd; 1495 uint16_t mask = mve_element_mask(env); 1496 unsigned e; 1497 uint32_t r; 1498 1499 /* 1500 * For each 32-bit element, we shift it left, bringing in the 1501 * low 'shift' bits of rdm at the bottom. Bits shifted out at 1502 * the top become the new rdm, if the predicate mask permits. 1503 * The final rdm value is returned to update the register. 1504 * shift == 0 here means "shift by 32 bits". 1505 */ 1506 if (shift == 0) { 1507 for (e = 0; e < 16 / 4; e++, mask >>= 4) { 1508 r = rdm; 1509 if (mask & 1) { 1510 rdm = d[H4(e)]; 1511 } 1512 mergemask(&d[H4(e)], r, mask); 1513 } 1514 } else { 1515 uint32_t shiftmask = MAKE_64BIT_MASK(0, shift); 1516 1517 for (e = 0; e < 16 / 4; e++, mask >>= 4) { 1518 r = (d[H4(e)] << shift) | (rdm & shiftmask); 1519 if (mask & 1) { 1520 rdm = d[H4(e)] >> (32 - shift); 1521 } 1522 mergemask(&d[H4(e)], r, mask); 1523 } 1524 } 1525 mve_advance_vpt(env); 1526 return rdm; 1527 } 1528 1529 uint64_t HELPER(mve_sshrl)(CPUARMState *env, uint64_t n, uint32_t shift) 1530 { 1531 return do_sqrshl_d(n, -(int8_t)shift, false, NULL); 1532 } 1533 1534 uint64_t HELPER(mve_ushll)(CPUARMState *env, uint64_t n, uint32_t shift) 1535 { 1536 return do_uqrshl_d(n, (int8_t)shift, false, NULL); 1537 } 1538 1539 uint64_t HELPER(mve_sqshll)(CPUARMState *env, uint64_t n, uint32_t shift) 1540 { 1541 return do_sqrshl_d(n, (int8_t)shift, false, &env->QF); 1542 } 1543 1544 uint64_t HELPER(mve_uqshll)(CPUARMState *env, uint64_t n, uint32_t shift) 1545 { 1546 return do_uqrshl_d(n, (int8_t)shift, false, &env->QF); 1547 } 1548 1549 uint64_t HELPER(mve_sqrshrl)(CPUARMState *env, uint64_t n, uint32_t shift) 1550 { 1551 return do_sqrshl_d(n, -(int8_t)shift, true, &env->QF); 1552 } 1553 1554 uint64_t HELPER(mve_uqrshll)(CPUARMState *env, uint64_t n, uint32_t shift) 1555 { 1556 return do_uqrshl_d(n, (int8_t)shift, true, &env->QF); 1557 } 1558 1559 /* Operate on 64-bit values, but saturate at 48 bits */ 1560 static inline int64_t do_sqrshl48_d(int64_t src, int64_t shift, 1561 bool round, uint32_t *sat) 1562 { 1563 if (shift <= -48) { 1564 /* Rounding the sign bit always produces 0. */ 1565 if (round) { 1566 return 0; 1567 } 1568 return src >> 63; 1569 } else if (shift < 0) { 1570 if (round) { 1571 src >>= -shift - 1; 1572 return (src >> 1) + (src & 1); 1573 } 1574 return src >> -shift; 1575 } else if (shift < 48) { 1576 int64_t val = src << shift; 1577 int64_t extval = sextract64(val, 0, 48); 1578 if (!sat || val == extval) { 1579 return extval; 1580 } 1581 } else if (!sat || src == 0) { 1582 return 0; 1583 } 1584 1585 *sat = 1; 1586 return (1ULL << 47) - (src >= 0); 1587 } 1588 1589 /* Operate on 64-bit values, but saturate at 48 bits */ 1590 static inline uint64_t do_uqrshl48_d(uint64_t src, int64_t shift, 1591 bool round, uint32_t *sat) 1592 { 1593 uint64_t val, extval; 1594 1595 if (shift <= -(48 + round)) { 1596 return 0; 1597 } else if (shift < 0) { 1598 if (round) { 1599 val = src >> (-shift - 1); 1600 val = (val >> 1) + (val & 1); 1601 } else { 1602 val = src >> -shift; 1603 } 1604 extval = extract64(val, 0, 48); 1605 if (!sat || val == extval) { 1606 return extval; 1607 } 1608 } else if (shift < 48) { 1609 uint64_t val = src << shift; 1610 uint64_t extval = extract64(val, 0, 48); 1611 if (!sat || val == extval) { 1612 return extval; 1613 } 1614 } else if (!sat || src == 0) { 1615 return 0; 1616 } 1617 1618 *sat = 1; 1619 return MAKE_64BIT_MASK(0, 48); 1620 } 1621 1622 uint64_t HELPER(mve_sqrshrl48)(CPUARMState *env, uint64_t n, uint32_t shift) 1623 { 1624 return do_sqrshl48_d(n, -(int8_t)shift, true, &env->QF); 1625 } 1626 1627 uint64_t HELPER(mve_uqrshll48)(CPUARMState *env, uint64_t n, uint32_t shift) 1628 { 1629 return do_uqrshl48_d(n, (int8_t)shift, true, &env->QF); 1630 } 1631