target-arm/neon_helper.c

   1 /*
   2  * ARM NEON vector operations.
   3  *
   4  * Copyright (c) 2007, 2008 CodeSourcery.
   5  * Written by Paul Brook
   6  *
   7  * This code is licenced under the GNU GPL v2.
   8  */
   9 #include <stdlib.h>
  10 #include <stdio.h>
  11
  12 #include "cpu.h"
  13 #include "exec-all.h"
  14 #include "helpers.h"
  15
  16 #define SIGNBIT (uint32_t)0x80000000
  17 #define SIGNBIT64 ((uint64_t)1 << 63)
  18
  19 #define SET_QC() env->vfp.xregs[ARM_VFP_FPSCR] = CPSR_Q
  20
  21 static float_status neon_float_status;
  22 #define NFS &neon_float_status
  23
  24 /* Helper routines to perform bitwise copies between float and int.  */
  25 static inline float32 vfp_itos(uint32_t i)
  26 {
  27     union {
  28         uint32_t i;
  29         float32 s;
  30     } v;
  31
  32     v.i = i;
  33     return v.s;
  34 }
  35
  36 static inline uint32_t vfp_stoi(float32 s)
  37 {
  38     union {
  39         uint32_t i;
  40         float32 s;
  41     } v;
  42
  43     v.s = s;
  44     return v.i;
  45 }
  46
  47 #define NEON_TYPE1(name, type) \
  48 typedef struct \
  49 { \
  50     type v1; \
  51 } neon_##name;
  52 #ifdef HOST_WORDS_BIGENDIAN
  53 #define NEON_TYPE2(name, type) \
  54 typedef struct \
  55 { \
  56     type v2; \
  57     type v1; \
  58 } neon_##name;
  59 #define NEON_TYPE4(name, type) \
  60 typedef struct \
  61 { \
  62     type v4; \
  63     type v3; \
  64     type v2; \
  65     type v1; \
  66 } neon_##name;
  67 #else
  68 #define NEON_TYPE2(name, type) \
  69 typedef struct \
  70 { \
  71     type v1; \
  72     type v2; \
  73 } neon_##name;
  74 #define NEON_TYPE4(name, type) \
  75 typedef struct \
  76 { \
  77     type v1; \
  78     type v2; \
  79     type v3; \
  80     type v4; \
  81 } neon_##name;
  82 #endif
  83
  84 NEON_TYPE4(s8, int8_t)
  85 NEON_TYPE4(u8, uint8_t)
  86 NEON_TYPE2(s16, int16_t)
  87 NEON_TYPE2(u16, uint16_t)
  88 NEON_TYPE1(s32, int32_t)
  89 NEON_TYPE1(u32, uint32_t)
  90 #undef NEON_TYPE4
  91 #undef NEON_TYPE2
  92 #undef NEON_TYPE1
  93
  94 /* Copy from a uint32_t to a vector structure type.  */
  95 #define NEON_UNPACK(vtype, dest, val) do { \
  96     union { \
  97         vtype v; \
  98         uint32_t i; \
  99     } conv_u; \
 100     conv_u.i = (val); \
 101     dest = conv_u.v; \
 102     } while(0)
 103
 104 /* Copy from a vector structure type to a uint32_t.  */
 105 #define NEON_PACK(vtype, dest, val) do { \
 106     union { \
 107         vtype v; \
 108         uint32_t i; \
 109     } conv_u; \
 110     conv_u.v = (val); \
 111     dest = conv_u.i; \
 112     } while(0)
 113
 114 #define NEON_DO1 \
 115     NEON_FN(vdest.v1, vsrc1.v1, vsrc2.v1);
 116 #define NEON_DO2 \
 117     NEON_FN(vdest.v1, vsrc1.v1, vsrc2.v1); \
 118     NEON_FN(vdest.v2, vsrc1.v2, vsrc2.v2);
 119 #define NEON_DO4 \
 120     NEON_FN(vdest.v1, vsrc1.v1, vsrc2.v1); \
 121     NEON_FN(vdest.v2, vsrc1.v2, vsrc2.v2); \
 122     NEON_FN(vdest.v3, vsrc1.v3, vsrc2.v3); \
 123     NEON_FN(vdest.v4, vsrc1.v4, vsrc2.v4);
 124
 125 #define NEON_VOP_BODY(vtype, n) \
 126 { \
 127     uint32_t res; \
 128     vtype vsrc1; \
 129     vtype vsrc2; \
 130     vtype vdest; \
 131     NEON_UNPACK(vtype, vsrc1, arg1); \
 132     NEON_UNPACK(vtype, vsrc2, arg2); \
 133     NEON_DO##n; \
 134     NEON_PACK(vtype, res, vdest); \
 135     return res; \
 136 }
 137
 138 #define NEON_VOP(name, vtype, n) \
 139 uint32_t HELPER(glue(neon_,name))(uint32_t arg1, uint32_t arg2) \
 140 NEON_VOP_BODY(vtype, n)
 141
 142 #define NEON_VOP_ENV(name, vtype, n) \
 143 uint32_t HELPER(glue(neon_,name))(CPUState *env, uint32_t arg1, uint32_t arg2) \
 144 NEON_VOP_BODY(vtype, n)
 145
 146 /* Pairwise operations.  */
 147 /* For 32-bit elements each segment only contains a single element, so
 148    the elementwise and pairwise operations are the same.  */
 149 #define NEON_PDO2 \
 150     NEON_FN(vdest.v1, vsrc1.v1, vsrc1.v2); \
 151     NEON_FN(vdest.v2, vsrc2.v1, vsrc2.v2);
 152 #define NEON_PDO4 \
 153     NEON_FN(vdest.v1, vsrc1.v1, vsrc1.v2); \
 154     NEON_FN(vdest.v2, vsrc1.v3, vsrc1.v4); \
 155     NEON_FN(vdest.v3, vsrc2.v1, vsrc2.v2); \
 156     NEON_FN(vdest.v4, vsrc2.v3, vsrc2.v4); \
 157
 158 #define NEON_POP(name, vtype, n) \
 159 uint32_t HELPER(glue(neon_,name))(uint32_t arg1, uint32_t arg2) \
 160 { \
 161     uint32_t res; \
 162     vtype vsrc1; \
 163     vtype vsrc2; \
 164     vtype vdest; \
 165     NEON_UNPACK(vtype, vsrc1, arg1); \
 166     NEON_UNPACK(vtype, vsrc2, arg2); \
 167     NEON_PDO##n; \
 168     NEON_PACK(vtype, res, vdest); \
 169     return res; \
 170 }
 171
 172 /* Unary operators.  */
 173 #define NEON_VOP1(name, vtype, n) \
 174 uint32_t HELPER(glue(neon_,name))(uint32_t arg) \
 175 { \
 176     vtype vsrc1; \
 177     vtype vdest; \
 178     NEON_UNPACK(vtype, vsrc1, arg); \
 179     NEON_DO##n; \
 180     NEON_PACK(vtype, arg, vdest); \
 181     return arg; \
 182 }
 183
 184
 185 #define NEON_USAT(dest, src1, src2, type) do { \
 186     uint32_t tmp = (uint32_t)src1 + (uint32_t)src2; \
 187     if (tmp != (type)tmp) { \
 188         SET_QC(); \
 189         dest = ~0; \
 190     } else { \
 191         dest = tmp; \
 192     }} while(0)
 193 #define NEON_FN(dest, src1, src2) NEON_USAT(dest, src1, src2, uint8_t)
 194 NEON_VOP_ENV(qadd_u8, neon_u8, 4)
 195 #undef NEON_FN
 196 #define NEON_FN(dest, src1, src2) NEON_USAT(dest, src1, src2, uint16_t)
 197 NEON_VOP_ENV(qadd_u16, neon_u16, 2)
 198 #undef NEON_FN
 199 #undef NEON_USAT
 200
 201 uint32_t HELPER(neon_qadd_u32)(CPUState *env, uint32_t a, uint32_t b)
 202 {
 203     uint32_t res = a + b;
 204     if (res < a) {
 205         SET_QC();
 206         res = ~0;
 207     }
 208     return res;
 209 }
 210
 211 uint64_t HELPER(neon_qadd_u64)(CPUState *env, uint64_t src1, uint64_t src2)
 212 {
 213     uint64_t res;
 214
 215     res = src1 + src2;
 216     if (res < src1) {
 217         SET_QC();
 218         res = ~(uint64_t)0;
 219     }
 220     return res;
 221 }
 222
 223 #define NEON_SSAT(dest, src1, src2, type) do { \
 224     int32_t tmp = (uint32_t)src1 + (uint32_t)src2; \
 225     if (tmp != (type)tmp) { \
 226         SET_QC(); \
 227         if (src2 > 0) { \
 228             tmp = (1 << (sizeof(type) * 8 - 1)) - 1; \
 229         } else { \
 230             tmp = 1 << (sizeof(type) * 8 - 1); \
 231         } \
 232     } \
 233     dest = tmp; \
 234     } while(0)
 235 #define NEON_FN(dest, src1, src2) NEON_SSAT(dest, src1, src2, int8_t)
 236 NEON_VOP_ENV(qadd_s8, neon_s8, 4)
 237 #undef NEON_FN
 238 #define NEON_FN(dest, src1, src2) NEON_SSAT(dest, src1, src2, int16_t)
 239 NEON_VOP_ENV(qadd_s16, neon_s16, 2)
 240 #undef NEON_FN
 241 #undef NEON_SSAT
 242
 243 uint32_t HELPER(neon_qadd_s32)(CPUState *env, uint32_t a, uint32_t b)
 244 {
 245     uint32_t res = a + b;
 246     if (((res ^ a) & SIGNBIT) && !((a ^ b) & SIGNBIT)) {
 247         SET_QC();
 248         res = ~(((int32_t)a >> 31) ^ SIGNBIT);
 249     }
 250     return res;
 251 }
 252
 253 uint64_t HELPER(neon_qadd_s64)(CPUState *env, uint64_t src1, uint64_t src2)
 254 {
 255     uint64_t res;
 256
 257     res = src1 + src2;
 258     if (((res ^ src1) & SIGNBIT64) && !((src1 ^ src2) & SIGNBIT64)) {
 259         SET_QC();
 260         res = ((int64_t)src1 >> 63) ^ ~SIGNBIT64;
 261     }
 262     return res;
 263 }
 264
 265 #define NEON_USAT(dest, src1, src2, type) do { \
 266     uint32_t tmp = (uint32_t)src1 - (uint32_t)src2; \
 267     if (tmp != (type)tmp) { \
 268         SET_QC(); \
 269         dest = 0; \
 270     } else { \
 271         dest = tmp; \
 272     }} while(0)
 273 #define NEON_FN(dest, src1, src2) NEON_USAT(dest, src1, src2, uint8_t)
 274 NEON_VOP_ENV(qsub_u8, neon_u8, 4)
 275 #undef NEON_FN
 276 #define NEON_FN(dest, src1, src2) NEON_USAT(dest, src1, src2, uint16_t)
 277 NEON_VOP_ENV(qsub_u16, neon_u16, 2)
 278 #undef NEON_FN
 279 #undef NEON_USAT
 280
 281 uint32_t HELPER(neon_qsub_u32)(CPUState *env, uint32_t a, uint32_t b)
 282 {
 283     uint32_t res = a - b;
 284     if (res > a) {
 285         SET_QC();
 286         res = 0;
 287     }
 288     return res;
 289 }
 290
 291 uint64_t HELPER(neon_qsub_u64)(CPUState *env, uint64_t src1, uint64_t src2)
 292 {
 293     uint64_t res;
 294
 295     if (src1 < src2) {
 296         SET_QC();
 297         res = 0;
 298     } else {
 299         res = src1 - src2;
 300     }
 301     return res;
 302 }
 303
 304 #define NEON_SSAT(dest, src1, src2, type) do { \
 305     int32_t tmp = (uint32_t)src1 - (uint32_t)src2; \
 306     if (tmp != (type)tmp) { \
 307         SET_QC(); \
 308         if (src2 < 0) { \
 309             tmp = (1 << (sizeof(type) * 8 - 1)) - 1; \
 310         } else { \
 311             tmp = 1 << (sizeof(type) * 8 - 1); \
 312         } \
 313     } \
 314     dest = tmp; \
 315     } while(0)
 316 #define NEON_FN(dest, src1, src2) NEON_SSAT(dest, src1, src2, int8_t)
 317 NEON_VOP_ENV(qsub_s8, neon_s8, 4)
 318 #undef NEON_FN
 319 #define NEON_FN(dest, src1, src2) NEON_SSAT(dest, src1, src2, int16_t)
 320 NEON_VOP_ENV(qsub_s16, neon_s16, 2)
 321 #undef NEON_FN
 322 #undef NEON_SSAT
 323
 324 uint32_t HELPER(neon_qsub_s32)(CPUState *env, uint32_t a, uint32_t b)
 325 {
 326     uint32_t res = a - b;
 327     if (((res ^ a) & SIGNBIT) && ((a ^ b) & SIGNBIT)) {
 328         SET_QC();
 329         res = ~(((int32_t)a >> 31) ^ SIGNBIT);
 330     }
 331     return res;
 332 }
 333
 334 uint64_t HELPER(neon_qsub_s64)(CPUState *env, uint64_t src1, uint64_t src2)
 335 {
 336     uint64_t res;
 337
 338     res = src1 - src2;
 339     if (((res ^ src1) & SIGNBIT64) && ((src1 ^ src2) & SIGNBIT64)) {
 340         SET_QC();
 341         res = ((int64_t)src1 >> 63) ^ ~SIGNBIT64;
 342     }
 343     return res;
 344 }
 345
 346 #define NEON_FN(dest, src1, src2) dest = (src1 + src2) >> 1
 347 NEON_VOP(hadd_s8, neon_s8, 4)
 348 NEON_VOP(hadd_u8, neon_u8, 4)
 349 NEON_VOP(hadd_s16, neon_s16, 2)
 350 NEON_VOP(hadd_u16, neon_u16, 2)
 351 #undef NEON_FN
 352
 353 int32_t HELPER(neon_hadd_s32)(int32_t src1, int32_t src2)
 354 {
 355     int32_t dest;
 356
 357     dest = (src1 >> 1) + (src2 >> 1);
 358     if (src1 & src2 & 1)
 359         dest++;
 360     return dest;
 361 }
 362
 363 uint32_t HELPER(neon_hadd_u32)(uint32_t src1, uint32_t src2)
 364 {
 365     uint32_t dest;
 366
 367     dest = (src1 >> 1) + (src2 >> 1);
 368     if (src1 & src2 & 1)
 369         dest++;
 370     return dest;
 371 }
 372
 373 #define NEON_FN(dest, src1, src2) dest = (src1 + src2 + 1) >> 1
 374 NEON_VOP(rhadd_s8, neon_s8, 4)
 375 NEON_VOP(rhadd_u8, neon_u8, 4)
 376 NEON_VOP(rhadd_s16, neon_s16, 2)
 377 NEON_VOP(rhadd_u16, neon_u16, 2)
 378 #undef NEON_FN
 379
 380 int32_t HELPER(neon_rhadd_s32)(int32_t src1, int32_t src2)
 381 {
 382     int32_t dest;
 383
 384     dest = (src1 >> 1) + (src2 >> 1);
 385     if ((src1 | src2) & 1)
 386         dest++;
 387     return dest;
 388 }
 389
 390 uint32_t HELPER(neon_rhadd_u32)(uint32_t src1, uint32_t src2)
 391 {
 392     uint32_t dest;
 393
 394     dest = (src1 >> 1) + (src2 >> 1);
 395     if ((src1 | src2) & 1)
 396         dest++;
 397     return dest;
 398 }
 399
 400 #define NEON_FN(dest, src1, src2) dest = (src1 - src2) >> 1
 401 NEON_VOP(hsub_s8, neon_s8, 4)
 402 NEON_VOP(hsub_u8, neon_u8, 4)
 403 NEON_VOP(hsub_s16, neon_s16, 2)
 404 NEON_VOP(hsub_u16, neon_u16, 2)
 405 #undef NEON_FN
 406
 407 int32_t HELPER(neon_hsub_s32)(int32_t src1, int32_t src2)
 408 {
 409     int32_t dest;
 410
 411     dest = (src1 >> 1) - (src2 >> 1);
 412     if ((~src1) & src2 & 1)
 413         dest--;
 414     return dest;
 415 }
 416
 417 uint32_t HELPER(neon_hsub_u32)(uint32_t src1, uint32_t src2)
 418 {
 419     uint32_t dest;
 420
 421     dest = (src1 >> 1) - (src2 >> 1);
 422     if ((~src1) & src2 & 1)
 423         dest--;
 424     return dest;
 425 }
 426
 427 #define NEON_FN(dest, src1, src2) dest = (src1 > src2) ? ~0 : 0
 428 NEON_VOP(cgt_s8, neon_s8, 4)
 429 NEON_VOP(cgt_u8, neon_u8, 4)
 430 NEON_VOP(cgt_s16, neon_s16, 2)
 431 NEON_VOP(cgt_u16, neon_u16, 2)
 432 NEON_VOP(cgt_s32, neon_s32, 1)
 433 NEON_VOP(cgt_u32, neon_u32, 1)
 434 #undef NEON_FN
 435
 436 #define NEON_FN(dest, src1, src2) dest = (src1 >= src2) ? ~0 : 0
 437 NEON_VOP(cge_s8, neon_s8, 4)
 438 NEON_VOP(cge_u8, neon_u8, 4)
 439 NEON_VOP(cge_s16, neon_s16, 2)
 440 NEON_VOP(cge_u16, neon_u16, 2)
 441 NEON_VOP(cge_s32, neon_s32, 1)
 442 NEON_VOP(cge_u32, neon_u32, 1)
 443 #undef NEON_FN
 444
 445 #define NEON_FN(dest, src1, src2) dest = (src1 < src2) ? src1 : src2
 446 NEON_VOP(min_s8, neon_s8, 4)
 447 NEON_VOP(min_u8, neon_u8, 4)
 448 NEON_VOP(min_s16, neon_s16, 2)
 449 NEON_VOP(min_u16, neon_u16, 2)
 450 NEON_VOP(min_s32, neon_s32, 1)
 451 NEON_VOP(min_u32, neon_u32, 1)
 452 NEON_POP(pmin_s8, neon_s8, 4)
 453 NEON_POP(pmin_u8, neon_u8, 4)
 454 NEON_POP(pmin_s16, neon_s16, 2)
 455 NEON_POP(pmin_u16, neon_u16, 2)
 456 #undef NEON_FN
 457
 458 #define NEON_FN(dest, src1, src2) dest = (src1 > src2) ? src1 : src2
 459 NEON_VOP(max_s8, neon_s8, 4)
 460 NEON_VOP(max_u8, neon_u8, 4)
 461 NEON_VOP(max_s16, neon_s16, 2)
 462 NEON_VOP(max_u16, neon_u16, 2)
 463 NEON_VOP(max_s32, neon_s32, 1)
 464 NEON_VOP(max_u32, neon_u32, 1)
 465 NEON_POP(pmax_s8, neon_s8, 4)
 466 NEON_POP(pmax_u8, neon_u8, 4)
 467 NEON_POP(pmax_s16, neon_s16, 2)
 468 NEON_POP(pmax_u16, neon_u16, 2)
 469 #undef NEON_FN
 470
 471 #define NEON_FN(dest, src1, src2) \
 472     dest = (src1 > src2) ? (src1 - src2) : (src2 - src1)
 473 NEON_VOP(abd_s8, neon_s8, 4)
 474 NEON_VOP(abd_u8, neon_u8, 4)
 475 NEON_VOP(abd_s16, neon_s16, 2)
 476 NEON_VOP(abd_u16, neon_u16, 2)
 477 NEON_VOP(abd_s32, neon_s32, 1)
 478 NEON_VOP(abd_u32, neon_u32, 1)
 479 #undef NEON_FN
 480
 481 #define NEON_FN(dest, src1, src2) do { \
 482     int8_t tmp; \
 483     tmp = (int8_t)src2; \
 484     if (tmp >= (ssize_t)sizeof(src1) * 8 || \
 485         tmp <= -(ssize_t)sizeof(src1) * 8) { \
 486         dest = 0; \
 487     } else if (tmp < 0) { \
 488         dest = src1 >> -tmp; \
 489     } else { \
 490         dest = src1 << tmp; \
 491     }} while (0)
 492 NEON_VOP(shl_u8, neon_u8, 4)
 493 NEON_VOP(shl_u16, neon_u16, 2)
 494 NEON_VOP(shl_u32, neon_u32, 1)
 495 #undef NEON_FN
 496
 497 uint64_t HELPER(neon_shl_u64)(uint64_t val, uint64_t shiftop)
 498 {
 499     int8_t shift = (int8_t)shiftop;
 500     if (shift >= 64 || shift <= -64) {
 501         val = 0;
 502     } else if (shift < 0) {
 503         val >>= -shift;
 504     } else {
 505         val <<= shift;
 506     }
 507     return val;
 508 }
 509
 510 #define NEON_FN(dest, src1, src2) do { \
 511     int8_t tmp; \
 512     tmp = (int8_t)src2; \
 513     if (tmp >= (ssize_t)sizeof(src1) * 8) { \
 514         dest = 0; \
 515     } else if (tmp <= -(ssize_t)sizeof(src1) * 8) { \
 516         dest = src1 >> (sizeof(src1) * 8 - 1); \
 517     } else if (tmp < 0) { \
 518         dest = src1 >> -tmp; \
 519     } else { \
 520         dest = src1 << tmp; \
 521     }} while (0)
 522 NEON_VOP(shl_s8, neon_s8, 4)
 523 NEON_VOP(shl_s16, neon_s16, 2)
 524 NEON_VOP(shl_s32, neon_s32, 1)
 525 #undef NEON_FN
 526
 527 uint64_t HELPER(neon_shl_s64)(uint64_t valop, uint64_t shiftop)
 528 {
 529     int8_t shift = (int8_t)shiftop;
 530     int64_t val = valop;
 531     if (shift >= 64) {
 532         val = 0;
 533     } else if (shift <= -64) {
 534         val >>= 63;
 535     } else if (shift < 0) {
 536         val >>= -shift;
 537     } else {
 538         val <<= shift;
 539     }
 540     return val;
 541 }
 542
 543 #define NEON_FN(dest, src1, src2) do { \
 544     int8_t tmp; \
 545     tmp = (int8_t)src2; \
 546     if (tmp >= (ssize_t)sizeof(src1) * 8) { \
 547         dest = 0; \
 548     } else if (tmp < -(ssize_t)sizeof(src1) * 8) { \
 549         dest = src1 >> (sizeof(src1) * 8 - 1); \
 550     } else if (tmp == -(ssize_t)sizeof(src1) * 8) { \
 551         dest = src1 >> (tmp - 1); \
 552         dest++; \
 553         dest >>= 1; \
 554     } else if (tmp < 0) { \
 555         dest = (src1 + (1 << (-1 - tmp))) >> -tmp; \
 556     } else { \
 557         dest = src1 << tmp; \
 558     }} while (0)
 559 NEON_VOP(rshl_s8, neon_s8, 4)
 560 NEON_VOP(rshl_s16, neon_s16, 2)
 561 NEON_VOP(rshl_s32, neon_s32, 1)
 562 #undef NEON_FN
 563
 564 uint64_t HELPER(neon_rshl_s64)(uint64_t valop, uint64_t shiftop)
 565 {
 566     int8_t shift = (int8_t)shiftop;
 567     int64_t val = valop;
 568     if (shift >= 64) {
 569         val = 0;
 570     } else if (shift < -64) {
 571         val >>= 63;
 572     } else if (shift == -63) {
 573         val >>= 63;
 574         val++;
 575         val >>= 1;
 576     } else if (shift < 0) {
 577         val = (val + ((int64_t)1 << (-1 - shift))) >> -shift;
 578     } else {
 579         val <<= shift;
 580     }
 581     return val;
 582 }
 583
 584 #define NEON_FN(dest, src1, src2) do { \
 585     int8_t tmp; \
 586     tmp = (int8_t)src2; \
 587     if (tmp >= (ssize_t)sizeof(src1) * 8 || \
 588         tmp < -(ssize_t)sizeof(src1) * 8) { \
 589         dest = 0; \
 590     } else if (tmp == -(ssize_t)sizeof(src1) * 8) { \
 591         dest = src1 >> (tmp - 1); \
 592     } else if (tmp < 0) { \
 593         dest = (src1 + (1 << (-1 - tmp))) >> -tmp; \
 594     } else { \
 595         dest = src1 << tmp; \
 596     }} while (0)
 597 NEON_VOP(rshl_u8, neon_u8, 4)
 598 NEON_VOP(rshl_u16, neon_u16, 2)
 599 NEON_VOP(rshl_u32, neon_u32, 1)
 600 #undef NEON_FN
 601
 602 uint64_t HELPER(neon_rshl_u64)(uint64_t val, uint64_t shiftop)
 603 {
 604     int8_t shift = (uint8_t)shiftop;
 605     if (shift >= 64 || shift < 64) {
 606         val = 0;
 607     } else if (shift == -64) {
 608         /* Rounding a 1-bit result just preserves that bit.  */
 609         val >>= 63;
 610     } if (shift < 0) {
 611         val = (val + ((uint64_t)1 << (-1 - shift))) >> -shift;
 612         val >>= -shift;
 613     } else {
 614         val <<= shift;
 615     }
 616     return val;
 617 }
 618
 619 #define NEON_FN(dest, src1, src2) do { \
 620     int8_t tmp; \
 621     tmp = (int8_t)src2; \
 622     if (tmp >= (ssize_t)sizeof(src1) * 8) { \
 623         if (src1) { \
 624             SET_QC(); \
 625             dest = ~0; \
 626         } else { \
 627             dest = 0; \
 628         } \
 629     } else if (tmp <= -(ssize_t)sizeof(src1) * 8) { \
 630         dest = 0; \
 631     } else if (tmp < 0) { \
 632         dest = src1 >> -tmp; \
 633     } else { \
 634         dest = src1 << tmp; \
 635         if ((dest >> tmp) != src1) { \
 636             SET_QC(); \
 637             dest = ~0; \
 638         } \
 639     }} while (0)
 640 NEON_VOP_ENV(qshl_u8, neon_u8, 4)
 641 NEON_VOP_ENV(qshl_u16, neon_u16, 2)
 642 NEON_VOP_ENV(qshl_u32, neon_u32, 1)
 643 #undef NEON_FN
 644
 645 uint64_t HELPER(neon_qshl_u64)(CPUState *env, uint64_t val, uint64_t shiftop)
 646 {
 647     int8_t shift = (int8_t)shiftop;
 648     if (shift >= 64) {
 649         if (val) {
 650             val = ~(uint64_t)0;
 651             SET_QC();
 652         }
 653     } else if (shift <= -64) {
 654         val = 0;
 655     } else if (shift < 0) {
 656         val >>= -shift;
 657     } else {
 658         uint64_t tmp = val;
 659         val <<= shift;
 660         if ((val >> shift) != tmp) {
 661             SET_QC();
 662             val = ~(uint64_t)0;
 663         }
 664     }
 665     return val;
 666 }
 667
 668 #define NEON_FN(dest, src1, src2) do { \
 669     int8_t tmp; \
 670     tmp = (int8_t)src2; \
 671     if (tmp >= (ssize_t)sizeof(src1) * 8) { \
 672         if (src1) { \
 673             SET_QC(); \
 674             dest = (uint32_t)(1 << (sizeof(src1) * 8 - 1)); \
 675             if (src1 > 0) { \
 676                 dest--; \
 677             } \
 678         } else { \
 679             dest = src1; \
 680         } \
 681     } else if (tmp <= -(ssize_t)sizeof(src1) * 8) { \
 682         dest = src1 >> 31; \
 683     } else if (tmp < 0) { \
 684         dest = src1 >> -tmp; \
 685     } else { \
 686         dest = src1 << tmp; \
 687         if ((dest >> tmp) != src1) { \
 688             SET_QC(); \
 689             dest = (uint32_t)(1 << (sizeof(src1) * 8 - 1)); \
 690             if (src1 > 0) { \
 691                 dest--; \
 692             } \
 693         } \
 694     }} while (0)
 695 NEON_VOP_ENV(qshl_s8, neon_s8, 4)
 696 NEON_VOP_ENV(qshl_s16, neon_s16, 2)
 697 NEON_VOP_ENV(qshl_s32, neon_s32, 1)
 698 #undef NEON_FN
 699
 700 uint64_t HELPER(neon_qshl_s64)(CPUState *env, uint64_t valop, uint64_t shiftop)
 701 {
 702     int8_t shift = (uint8_t)shiftop;
 703     int64_t val = valop;
 704     if (shift >= 64) {
 705         if (val) {
 706             SET_QC();
 707             val = (val >> 63) ^ ~SIGNBIT64;
 708         }
 709     } else if (shift <= -64) {
 710         val >>= 63;
 711     } else if (shift < 0) {
 712         val >>= -shift;
 713     } else {
 714         int64_t tmp = val;
 715         val <<= shift;
 716         if ((val >> shift) != tmp) {
 717             SET_QC();
 718             val = (tmp >> 63) ^ ~SIGNBIT64;
 719         }
 720     }
 721     return val;
 722 }
 723
 724 #define NEON_FN(dest, src1, src2) do { \
 725     if (src1 & (1 << (sizeof(src1) * 8 - 1))) { \
 726         SET_QC(); \
 727         dest = 0; \
 728     } else { \
 729         int8_t tmp; \
 730         tmp = (int8_t)src2; \
 731         if (tmp >= (ssize_t)sizeof(src1) * 8) { \
 732             if (src1) { \
 733                 SET_QC(); \
 734                 dest = ~0; \
 735             } else { \
 736                 dest = 0; \
 737             } \
 738         } else if (tmp <= -(ssize_t)sizeof(src1) * 8) { \
 739             dest = 0; \
 740         } else if (tmp < 0) { \
 741             dest = src1 >> -tmp; \
 742         } else { \
 743             dest = src1 << tmp; \
 744             if ((dest >> tmp) != src1) { \
 745                 SET_QC(); \
 746                 dest = ~0; \
 747             } \
 748         } \
 749     }} while (0)
 750 NEON_VOP_ENV(qshlu_s8, neon_u8, 4)
 751 NEON_VOP_ENV(qshlu_s16, neon_u16, 2)
 752 #undef NEON_FN
 753
 754 uint32_t HELPER(neon_qshlu_s32)(CPUState *env, uint32_t valop, uint32_t shiftop)
 755 {
 756     if ((int32_t)valop < 0) {
 757         SET_QC();
 758         return 0;
 759     }
 760     return helper_neon_qshl_u32(env, valop, shiftop);
 761 }
 762
 763 uint64_t HELPER(neon_qshlu_s64)(CPUState *env, uint64_t valop, uint64_t shiftop)
 764 {
 765     if ((int64_t)valop < 0) {
 766         SET_QC();
 767         return 0;
 768     }
 769     return helper_neon_qshl_u64(env, valop, shiftop);
 770 }
 771
 772 /* FIXME: This is wrong.  */
 773 #define NEON_FN(dest, src1, src2) do { \
 774     int8_t tmp; \
 775     tmp = (int8_t)src2; \
 776     if (tmp < 0) { \
 777         dest = (src1 + (1 << (-1 - tmp))) >> -tmp; \
 778     } else { \
 779         dest = src1 << tmp; \
 780         if ((dest >> tmp) != src1) { \
 781             SET_QC(); \
 782             dest = ~0; \
 783         } \
 784     }} while (0)
 785 NEON_VOP_ENV(qrshl_u8, neon_u8, 4)
 786 NEON_VOP_ENV(qrshl_u16, neon_u16, 2)
 787 NEON_VOP_ENV(qrshl_u32, neon_u32, 1)
 788 #undef NEON_FN
 789
 790 uint64_t HELPER(neon_qrshl_u64)(CPUState *env, uint64_t val, uint64_t shiftop)
 791 {
 792     int8_t shift = (int8_t)shiftop;
 793     if (shift < 0) {
 794         val = (val + (1 << (-1 - shift))) >> -shift;
 795     } else { \
 796         uint64_t tmp = val;
 797         val <<= shift;
 798         if ((val >> shift) != tmp) {
 799             SET_QC();
 800             val = ~0;
 801         }
 802     }
 803     return val;
 804 }
 805
 806 #define NEON_FN(dest, src1, src2) do { \
 807     int8_t tmp; \
 808     tmp = (int8_t)src2; \
 809     if (tmp < 0) { \
 810         dest = (src1 + (1 << (-1 - tmp))) >> -tmp; \
 811     } else { \
 812         dest = src1 << tmp; \
 813         if ((dest >> tmp) != src1) { \
 814             SET_QC(); \
 815             dest = src1 >> 31; \
 816         } \
 817     }} while (0)
 818 NEON_VOP_ENV(qrshl_s8, neon_s8, 4)
 819 NEON_VOP_ENV(qrshl_s16, neon_s16, 2)
 820 NEON_VOP_ENV(qrshl_s32, neon_s32, 1)
 821 #undef NEON_FN
 822
 823 uint64_t HELPER(neon_qrshl_s64)(CPUState *env, uint64_t valop, uint64_t shiftop)
 824 {
 825     int8_t shift = (uint8_t)shiftop;
 826     int64_t val = valop;
 827
 828     if (shift < 0) {
 829         val = (val + (1 << (-1 - shift))) >> -shift;
 830     } else {
 831         int64_t tmp = val;;
 832         val <<= shift;
 833         if ((val >> shift) != tmp) {
 834             SET_QC();
 835             val = tmp >> 31;
 836         }
 837     }
 838     return val;
 839 }
 840
 841 uint32_t HELPER(neon_add_u8)(uint32_t a, uint32_t b)
 842 {
 843     uint32_t mask;
 844     mask = (a ^ b) & 0x80808080u;
 845     a &= ~0x80808080u;
 846     b &= ~0x80808080u;
 847     return (a + b) ^ mask;
 848 }
 849
 850 uint32_t HELPER(neon_add_u16)(uint32_t a, uint32_t b)
 851 {
 852     uint32_t mask;
 853     mask = (a ^ b) & 0x80008000u;
 854     a &= ~0x80008000u;
 855     b &= ~0x80008000u;
 856     return (a + b) ^ mask;
 857 }
 858
 859 #define NEON_FN(dest, src1, src2) dest = src1 + src2
 860 NEON_POP(padd_u8, neon_u8, 4)
 861 NEON_POP(padd_u16, neon_u16, 2)
 862 #undef NEON_FN
 863
 864 #define NEON_FN(dest, src1, src2) dest = src1 - src2
 865 NEON_VOP(sub_u8, neon_u8, 4)
 866 NEON_VOP(sub_u16, neon_u16, 2)
 867 #undef NEON_FN
 868
 869 #define NEON_FN(dest, src1, src2) dest = src1 * src2
 870 NEON_VOP(mul_u8, neon_u8, 4)
 871 NEON_VOP(mul_u16, neon_u16, 2)
 872 #undef NEON_FN
 873
 874 /* Polynomial multiplication is like integer multiplication except the
 875    partial products are XORed, not added.  */
 876 uint32_t HELPER(neon_mul_p8)(uint32_t op1, uint32_t op2)
 877 {
 878     uint32_t mask;
 879     uint32_t result;
 880     result = 0;
 881     while (op1) {
 882         mask = 0;
 883         if (op1 & 1)
 884             mask |= 0xff;
 885         if (op1 & (1 << 8))
 886             mask |= (0xff << 8);
 887         if (op1 & (1 << 16))
 888             mask |= (0xff << 16);
 889         if (op1 & (1 << 24))
 890             mask |= (0xff << 24);
 891         result ^= op2 & mask;
 892         op1 = (op1 >> 1) & 0x7f7f7f7f;
 893         op2 = (op2 << 1) & 0xfefefefe;
 894     }
 895     return result;
 896 }
 897
 898 uint64_t HELPER(neon_mull_p8)(uint32_t op1, uint32_t op2)
 899 {
 900     uint64_t result = 0;
 901     uint64_t mask;
 902     uint64_t op2ex = op2;
 903     op2ex = (op2ex & 0xff) |
 904         ((op2ex & 0xff00) << 8) |
 905         ((op2ex & 0xff0000) << 16) |
 906         ((op2ex & 0xff000000) << 24);
 907     while (op1) {
 908         mask = 0;
 909         if (op1 & 1) {
 910             mask |= 0xffff;
 911         }
 912         if (op1 & (1 << 8)) {
 913             mask |= (0xffffU << 16);
 914         }
 915         if (op1 & (1 << 16)) {
 916             mask |= (0xffffULL << 32);
 917         }
 918         if (op1 & (1 << 24)) {
 919             mask |= (0xffffULL << 48);
 920         }
 921         result ^= op2ex & mask;
 922         op1 = (op1 >> 1) & 0x7f7f7f7f;
 923         op2ex <<= 1;
 924     }
 925     return result;
 926 }
 927
 928 #define NEON_FN(dest, src1, src2) dest = (src1 & src2) ? -1 : 0
 929 NEON_VOP(tst_u8, neon_u8, 4)
 930 NEON_VOP(tst_u16, neon_u16, 2)
 931 NEON_VOP(tst_u32, neon_u32, 1)
 932 #undef NEON_FN
 933
 934 #define NEON_FN(dest, src1, src2) dest = (src1 == src2) ? -1 : 0
 935 NEON_VOP(ceq_u8, neon_u8, 4)
 936 NEON_VOP(ceq_u16, neon_u16, 2)
 937 NEON_VOP(ceq_u32, neon_u32, 1)
 938 #undef NEON_FN
 939
 940 #define NEON_FN(dest, src, dummy) dest = (src < 0) ? -src : src
 941 NEON_VOP1(abs_s8, neon_s8, 4)
 942 NEON_VOP1(abs_s16, neon_s16, 2)
 943 #undef NEON_FN
 944
 945 /* Count Leading Sign/Zero Bits.  */
 946 static inline int do_clz8(uint8_t x)
 947 {
 948     int n;
 949     for (n = 8; x; n--)
 950         x >>= 1;
 951     return n;
 952 }
 953
 954 static inline int do_clz16(uint16_t x)
 955 {
 956     int n;
 957     for (n = 16; x; n--)
 958         x >>= 1;
 959     return n;
 960 }
 961
 962 #define NEON_FN(dest, src, dummy) dest = do_clz8(src)
 963 NEON_VOP1(clz_u8, neon_u8, 4)
 964 #undef NEON_FN
 965
 966 #define NEON_FN(dest, src, dummy) dest = do_clz16(src)
 967 NEON_VOP1(clz_u16, neon_u16, 2)
 968 #undef NEON_FN
 969
 970 #define NEON_FN(dest, src, dummy) dest = do_clz8((src < 0) ? ~src : src) - 1
 971 NEON_VOP1(cls_s8, neon_s8, 4)
 972 #undef NEON_FN
 973
 974 #define NEON_FN(dest, src, dummy) dest = do_clz16((src < 0) ? ~src : src) - 1
 975 NEON_VOP1(cls_s16, neon_s16, 2)
 976 #undef NEON_FN
 977
 978 uint32_t HELPER(neon_cls_s32)(uint32_t x)
 979 {
 980     int count;
 981     if ((int32_t)x < 0)
 982         x = ~x;
 983     for (count = 32; x; count--)
 984         x = x >> 1;
 985     return count - 1;
 986 }
 987
 988 /* Bit count.  */
 989 uint32_t HELPER(neon_cnt_u8)(uint32_t x)
 990 {
 991     x = (x & 0x55555555) + ((x >>  1) & 0x55555555);
 992     x = (x & 0x33333333) + ((x >>  2) & 0x33333333);
 993     x = (x & 0x0f0f0f0f) + ((x >>  4) & 0x0f0f0f0f);
 994     return x;
 995 }
 996
 997 #define NEON_QDMULH16(dest, src1, src2, round) do { \
 998     uint32_t tmp = (int32_t)(int16_t) src1 * (int16_t) src2; \
 999     if ((tmp ^ (tmp << 1)) & SIGNBIT) { \
1000         SET_QC(); \
1001         tmp = (tmp >> 31) ^ ~SIGNBIT; \
1002     } else { \
1003         tmp <<= 1; \
1004     } \
1005     if (round) { \
1006         int32_t old = tmp; \
1007         tmp += 1 << 15; \
1008         if ((int32_t)tmp < old) { \
1009             SET_QC(); \
1010             tmp = SIGNBIT - 1; \
1011         } \
1012     } \
1013     dest = tmp >> 16; \
1014     } while(0)
1015 #define NEON_FN(dest, src1, src2) NEON_QDMULH16(dest, src1, src2, 0)
1016 NEON_VOP_ENV(qdmulh_s16, neon_s16, 2)
1017 #undef NEON_FN
1018 #define NEON_FN(dest, src1, src2) NEON_QDMULH16(dest, src1, src2, 1)
1019 NEON_VOP_ENV(qrdmulh_s16, neon_s16, 2)
1020 #undef NEON_FN
1021 #undef NEON_QDMULH16
1022
1023 #define NEON_QDMULH32(dest, src1, src2, round) do { \
1024     uint64_t tmp = (int64_t)(int32_t) src1 * (int32_t) src2; \
1025     if ((tmp ^ (tmp << 1)) & SIGNBIT64) { \
1026         SET_QC(); \
1027         tmp = (tmp >> 63) ^ ~SIGNBIT64; \
1028     } else { \
1029         tmp <<= 1; \
1030     } \
1031     if (round) { \
1032         int64_t old = tmp; \
1033         tmp += (int64_t)1 << 31; \
1034         if ((int64_t)tmp < old) { \
1035             SET_QC(); \
1036             tmp = SIGNBIT64 - 1; \
1037         } \
1038     } \
1039     dest = tmp >> 32; \
1040     } while(0)
1041 #define NEON_FN(dest, src1, src2) NEON_QDMULH32(dest, src1, src2, 0)
1042 NEON_VOP_ENV(qdmulh_s32, neon_s32, 1)
1043 #undef NEON_FN
1044 #define NEON_FN(dest, src1, src2) NEON_QDMULH32(dest, src1, src2, 1)
1045 NEON_VOP_ENV(qrdmulh_s32, neon_s32, 1)
1046 #undef NEON_FN
1047 #undef NEON_QDMULH32
1048
1049 uint32_t HELPER(neon_narrow_u8)(uint64_t x)
1050 {
1051     return (x & 0xffu) | ((x >> 8) & 0xff00u) | ((x >> 16) & 0xff0000u)
1052            | ((x >> 24) & 0xff000000u);
1053 }
1054
1055 uint32_t HELPER(neon_narrow_u16)(uint64_t x)
1056 {
1057     return (x & 0xffffu) | ((x >> 16) & 0xffff0000u);
1058 }
1059
1060 uint32_t HELPER(neon_narrow_high_u8)(uint64_t x)
1061 {
1062     return ((x >> 8) & 0xff) | ((x >> 16) & 0xff00)
1063             | ((x >> 24) & 0xff0000) | ((x >> 32) & 0xff000000);
1064 }
1065
1066 uint32_t HELPER(neon_narrow_high_u16)(uint64_t x)
1067 {
1068     return ((x >> 16) & 0xffff) | ((x >> 32) & 0xffff0000);
1069 }
1070
1071 uint32_t HELPER(neon_narrow_round_high_u8)(uint64_t x)
1072 {
1073     x &= 0xff80ff80ff80ff80ull;
1074     x += 0x0080008000800080ull;
1075     return ((x >> 8) & 0xff) | ((x >> 16) & 0xff00)
1076             | ((x >> 24) & 0xff0000) | ((x >> 32) & 0xff000000);
1077 }
1078
1079 uint32_t HELPER(neon_narrow_round_high_u16)(uint64_t x)
1080 {
1081     x &= 0xffff8000ffff8000ull;
1082     x += 0x0000800000008000ull;
1083     return ((x >> 16) & 0xffff) | ((x >> 32) & 0xffff0000);
1084 }
1085
1086 uint32_t HELPER(neon_unarrow_sat8)(CPUState *env, uint64_t x)
1087 {
1088     uint16_t s;
1089     uint8_t d;
1090     uint32_t res = 0;
1091 #define SAT8(n) \
1092     s = x >> n; \
1093     if (s & 0x8000) { \
1094         SET_QC(); \
1095     } else { \
1096         if (s > 0xff) { \
1097             d = 0xff; \
1098             SET_QC(); \
1099         } else  { \
1100             d = s; \
1101         } \
1102         res |= (uint32_t)d << (n / 2); \
1103     }
1104
1105     SAT8(0);
1106     SAT8(16);
1107     SAT8(32);
1108     SAT8(48);
1109 #undef SAT8
1110     return res;
1111 }
1112
1113 uint32_t HELPER(neon_narrow_sat_u8)(CPUState *env, uint64_t x)
1114 {
1115     uint16_t s;
1116     uint8_t d;
1117     uint32_t res = 0;
1118 #define SAT8(n) \
1119     s = x >> n; \
1120     if (s > 0xff) { \
1121         d = 0xff; \
1122         SET_QC(); \
1123     } else  { \
1124         d = s; \
1125     } \
1126     res |= (uint32_t)d << (n / 2);
1127
1128     SAT8(0);
1129     SAT8(16);
1130     SAT8(32);
1131     SAT8(48);
1132 #undef SAT8
1133     return res;
1134 }
1135
1136 uint32_t HELPER(neon_narrow_sat_s8)(CPUState *env, uint64_t x)
1137 {
1138     int16_t s;
1139     uint8_t d;
1140     uint32_t res = 0;
1141 #define SAT8(n) \
1142     s = x >> n; \
1143     if (s != (int8_t)s) { \
1144         d = (s >> 15) ^ 0x7f; \
1145         SET_QC(); \
1146     } else  { \
1147         d = s; \
1148     } \
1149     res |= (uint32_t)d << (n / 2);
1150
1151     SAT8(0);
1152     SAT8(16);
1153     SAT8(32);
1154     SAT8(48);
1155 #undef SAT8
1156     return res;
1157 }
1158
1159 uint32_t HELPER(neon_unarrow_sat16)(CPUState *env, uint64_t x)
1160 {
1161     uint32_t high;
1162     uint32_t low;
1163     low = x;
1164     if (low & 0x80000000) {
1165         low = 0;
1166         SET_QC();
1167     } else if (low > 0xffff) {
1168         low = 0xffff;
1169         SET_QC();
1170     }
1171     high = x >> 32;
1172     if (high & 0x80000000) {
1173         high = 0;
1174         SET_QC();
1175     } else if (high > 0xffff) {
1176         high = 0xffff;
1177         SET_QC();
1178     }
1179     return low | (high << 16);
1180 }
1181
1182 uint32_t HELPER(neon_narrow_sat_u16)(CPUState *env, uint64_t x)
1183 {
1184     uint32_t high;
1185     uint32_t low;
1186     low = x;
1187     if (low > 0xffff) {
1188         low = 0xffff;
1189         SET_QC();
1190     }
1191     high = x >> 32;
1192     if (high > 0xffff) {
1193         high = 0xffff;
1194         SET_QC();
1195     }
1196     return low | (high << 16);
1197 }
1198
1199 uint32_t HELPER(neon_narrow_sat_s16)(CPUState *env, uint64_t x)
1200 {
1201     int32_t low;
1202     int32_t high;
1203     low = x;
1204     if (low != (int16_t)low) {
1205         low = (low >> 31) ^ 0x7fff;
1206         SET_QC();
1207     }
1208     high = x >> 32;
1209     if (high != (int16_t)high) {
1210         high = (high >> 31) ^ 0x7fff;
1211         SET_QC();
1212     }
1213     return (uint16_t)low | (high << 16);
1214 }
1215
1216 uint32_t HELPER(neon_unarrow_sat32)(CPUState *env, uint64_t x)
1217 {
1218     if (x & 0x8000000000000000ull) {
1219         SET_QC();
1220         return 0;
1221     }
1222     if (x > 0xffffffffu) {
1223         SET_QC();
1224         return 0xffffffffu;
1225     }
1226     return x;
1227 }
1228
1229 uint32_t HELPER(neon_narrow_sat_u32)(CPUState *env, uint64_t x)
1230 {
1231     if (x > 0xffffffffu) {
1232         SET_QC();
1233         return 0xffffffffu;
1234     }
1235     return x;
1236 }
1237
1238 uint32_t HELPER(neon_narrow_sat_s32)(CPUState *env, uint64_t x)
1239 {
1240     if ((int64_t)x != (int32_t)x) {
1241         SET_QC();
1242         return ((int64_t)x >> 63) ^ 0x7fffffff;
1243     }
1244     return x;
1245 }
1246
1247 uint64_t HELPER(neon_widen_u8)(uint32_t x)
1248 {
1249     uint64_t tmp;
1250     uint64_t ret;
1251     ret = (uint8_t)x;
1252     tmp = (uint8_t)(x >> 8);
1253     ret |= tmp << 16;
1254     tmp = (uint8_t)(x >> 16);
1255     ret |= tmp << 32;
1256     tmp = (uint8_t)(x >> 24);
1257     ret |= tmp << 48;
1258     return ret;
1259 }
1260
1261 uint64_t HELPER(neon_widen_s8)(uint32_t x)
1262 {
1263     uint64_t tmp;
1264     uint64_t ret;
1265     ret = (uint16_t)(int8_t)x;
1266     tmp = (uint16_t)(int8_t)(x >> 8);
1267     ret |= tmp << 16;
1268     tmp = (uint16_t)(int8_t)(x >> 16);
1269     ret |= tmp << 32;
1270     tmp = (uint16_t)(int8_t)(x >> 24);
1271     ret |= tmp << 48;
1272     return ret;
1273 }
1274
1275 uint64_t HELPER(neon_widen_u16)(uint32_t x)
1276 {
1277     uint64_t high = (uint16_t)(x >> 16);
1278     return ((uint16_t)x) | (high << 32);
1279 }
1280
1281 uint64_t HELPER(neon_widen_s16)(uint32_t x)
1282 {
1283     uint64_t high = (int16_t)(x >> 16);
1284     return ((uint32_t)(int16_t)x) | (high << 32);
1285 }
1286
1287 uint64_t HELPER(neon_addl_u16)(uint64_t a, uint64_t b)
1288 {
1289     uint64_t mask;
1290     mask = (a ^ b) & 0x8000800080008000ull;
1291     a &= ~0x8000800080008000ull;
1292     b &= ~0x8000800080008000ull;
1293     return (a + b) ^ mask;
1294 }
1295
1296 uint64_t HELPER(neon_addl_u32)(uint64_t a, uint64_t b)
1297 {
1298     uint64_t mask;
1299     mask = (a ^ b) & 0x8000000080000000ull;
1300     a &= ~0x8000000080000000ull;
1301     b &= ~0x8000000080000000ull;
1302     return (a + b) ^ mask;
1303 }
1304
1305 uint64_t HELPER(neon_paddl_u16)(uint64_t a, uint64_t b)
1306 {
1307     uint64_t tmp;
1308     uint64_t tmp2;
1309
1310     tmp = a & 0x0000ffff0000ffffull;
1311     tmp += (a >> 16) & 0x0000ffff0000ffffull;
1312     tmp2 = b & 0xffff0000ffff0000ull;
1313     tmp2 += (b << 16) & 0xffff0000ffff0000ull;
1314     return    ( tmp         & 0xffff)
1315             | ((tmp  >> 16) & 0xffff0000ull)
1316             | ((tmp2 << 16) & 0xffff00000000ull)
1317             | ( tmp2        & 0xffff000000000000ull);
1318 }
1319
1320 uint64_t HELPER(neon_paddl_u32)(uint64_t a, uint64_t b)
1321 {
1322     uint32_t low = a + (a >> 32);
1323     uint32_t high = b + (b >> 32);
1324     return low + ((uint64_t)high << 32);
1325 }
1326
1327 uint64_t HELPER(neon_subl_u16)(uint64_t a, uint64_t b)
1328 {
1329     uint64_t mask;
1330     mask = (a ^ ~b) & 0x8000800080008000ull;
1331     a |= 0x8000800080008000ull;
1332     b &= ~0x8000800080008000ull;
1333     return (a - b) ^ mask;
1334 }
1335
1336 uint64_t HELPER(neon_subl_u32)(uint64_t a, uint64_t b)
1337 {
1338     uint64_t mask;
1339     mask = (a ^ ~b) & 0x8000000080000000ull;
1340     a |= 0x8000000080000000ull;
1341     b &= ~0x8000000080000000ull;
1342     return (a - b) ^ mask;
1343 }
1344
1345 uint64_t HELPER(neon_addl_saturate_s32)(CPUState *env, uint64_t a, uint64_t b)
1346 {
1347     uint32_t x, y;
1348     uint32_t low, high;
1349
1350     x = a;
1351     y = b;
1352     low = x + y;
1353     if (((low ^ x) & SIGNBIT) && !((x ^ y) & SIGNBIT)) {
1354         SET_QC();
1355         low = ((int32_t)x >> 31) ^ ~SIGNBIT;
1356     }
1357     x = a >> 32;
1358     y = b >> 32;
1359     high = x + y;
1360     if (((high ^ x) & SIGNBIT) && !((x ^ y) & SIGNBIT)) {
1361         SET_QC();
1362         high = ((int32_t)x >> 31) ^ ~SIGNBIT;
1363     }
1364     return low | ((uint64_t)high << 32);
1365 }
1366
1367 uint64_t HELPER(neon_addl_saturate_s64)(CPUState *env, uint64_t a, uint64_t b)
1368 {
1369     uint64_t result;
1370
1371     result = a + b;
1372     if (((result ^ a) & SIGNBIT64) && !((a ^ b) & SIGNBIT64)) {
1373         SET_QC();
1374         result = ((int64_t)a >> 63) ^ ~SIGNBIT64;
1375     }
1376     return result;
1377 }
1378
1379 #define DO_ABD(dest, x, y, type) do { \
1380     type tmp_x = x; \
1381     type tmp_y = y; \
1382     dest = ((tmp_x > tmp_y) ? tmp_x - tmp_y : tmp_y - tmp_x); \
1383     } while(0)
1384
1385 uint64_t HELPER(neon_abdl_u16)(uint32_t a, uint32_t b)
1386 {
1387     uint64_t tmp;
1388     uint64_t result;
1389     DO_ABD(result, a, b, uint8_t);
1390     DO_ABD(tmp, a >> 8, b >> 8, uint8_t);
1391     result |= tmp << 16;
1392     DO_ABD(tmp, a >> 16, b >> 16, uint8_t);
1393     result |= tmp << 32;
1394     DO_ABD(tmp, a >> 24, b >> 24, uint8_t);
1395     result |= tmp << 48;
1396     return result;
1397 }
1398
1399 uint64_t HELPER(neon_abdl_s16)(uint32_t a, uint32_t b)
1400 {
1401     uint64_t tmp;
1402     uint64_t result;
1403     DO_ABD(result, a, b, int8_t);
1404     DO_ABD(tmp, a >> 8, b >> 8, int8_t);
1405     result |= tmp << 16;
1406     DO_ABD(tmp, a >> 16, b >> 16, int8_t);
1407     result |= tmp << 32;
1408     DO_ABD(tmp, a >> 24, b >> 24, int8_t);
1409     result |= tmp << 48;
1410     return result;
1411 }
1412
1413 uint64_t HELPER(neon_abdl_u32)(uint32_t a, uint32_t b)
1414 {
1415     uint64_t tmp;
1416     uint64_t result;
1417     DO_ABD(result, a, b, uint16_t);
1418     DO_ABD(tmp, a >> 16, b >> 16, uint16_t);
1419     return result | (tmp << 32);
1420 }
1421
1422 uint64_t HELPER(neon_abdl_s32)(uint32_t a, uint32_t b)
1423 {
1424     uint64_t tmp;
1425     uint64_t result;
1426     DO_ABD(result, a, b, int16_t);
1427     DO_ABD(tmp, a >> 16, b >> 16, int16_t);
1428     return result | (tmp << 32);
1429 }
1430
1431 uint64_t HELPER(neon_abdl_u64)(uint32_t a, uint32_t b)
1432 {
1433     uint64_t result;
1434     DO_ABD(result, a, b, uint32_t);
1435     return result;
1436 }
1437
1438 uint64_t HELPER(neon_abdl_s64)(uint32_t a, uint32_t b)
1439 {
1440     uint64_t result;
1441     DO_ABD(result, a, b, int32_t);
1442     return result;
1443 }
1444 #undef DO_ABD
1445
1446 /* Widening multiply. Named type is the source type.  */
1447 #define DO_MULL(dest, x, y, type1, type2) do { \
1448     type1 tmp_x = x; \
1449     type1 tmp_y = y; \
1450     dest = (type2)((type2)tmp_x * (type2)tmp_y); \
1451     } while(0)
1452
1453 uint64_t HELPER(neon_mull_u8)(uint32_t a, uint32_t b)
1454 {
1455     uint64_t tmp;
1456     uint64_t result;
1457
1458     DO_MULL(result, a, b, uint8_t, uint16_t);
1459     DO_MULL(tmp, a >> 8, b >> 8, uint8_t, uint16_t);
1460     result |= tmp << 16;
1461     DO_MULL(tmp, a >> 16, b >> 16, uint8_t, uint16_t);
1462     result |= tmp << 32;
1463     DO_MULL(tmp, a >> 24, b >> 24, uint8_t, uint16_t);
1464     result |= tmp << 48;
1465     return result;
1466 }
1467
1468 uint64_t HELPER(neon_mull_s8)(uint32_t a, uint32_t b)
1469 {
1470     uint64_t tmp;
1471     uint64_t result;
1472
1473     DO_MULL(result, a, b, int8_t, uint16_t);
1474     DO_MULL(tmp, a >> 8, b >> 8, int8_t, uint16_t);
1475     result |= tmp << 16;
1476     DO_MULL(tmp, a >> 16, b >> 16, int8_t, uint16_t);
1477     result |= tmp << 32;
1478     DO_MULL(tmp, a >> 24, b >> 24, int8_t, uint16_t);
1479     result |= tmp << 48;
1480     return result;
1481 }
1482
1483 uint64_t HELPER(neon_mull_u16)(uint32_t a, uint32_t b)
1484 {
1485     uint64_t tmp;
1486     uint64_t result;
1487
1488     DO_MULL(result, a, b, uint16_t, uint32_t);
1489     DO_MULL(tmp, a >> 16, b >> 16, uint16_t, uint32_t);
1490     return result | (tmp << 32);
1491 }
1492
1493 uint64_t HELPER(neon_mull_s16)(uint32_t a, uint32_t b)
1494 {
1495     uint64_t tmp;
1496     uint64_t result;
1497
1498     DO_MULL(result, a, b, int16_t, uint32_t);
1499     DO_MULL(tmp, a >> 16, b >> 16, int16_t, uint32_t);
1500     return result | (tmp << 32);
1501 }
1502
1503 uint64_t HELPER(neon_negl_u16)(uint64_t x)
1504 {
1505     uint16_t tmp;
1506     uint64_t result;
1507     result = (uint16_t)-x;
1508     tmp = -(x >> 16);
1509     result |= (uint64_t)tmp << 16;
1510     tmp = -(x >> 32);
1511     result |= (uint64_t)tmp << 32;
1512     tmp = -(x >> 48);
1513     result |= (uint64_t)tmp << 48;
1514     return result;
1515 }
1516
1517 uint64_t HELPER(neon_negl_u32)(uint64_t x)
1518 {
1519     uint32_t low = -x;
1520     uint32_t high = -(x >> 32);
1521     return low | ((uint64_t)high << 32);
1522 }
1523
1524 /* FIXME:  There should be a native op for this.  */
1525 uint64_t HELPER(neon_negl_u64)(uint64_t x)
1526 {
1527     return -x;
1528 }
1529
1530 /* Saturnating sign manuipulation.  */
1531 /* ??? Make these use NEON_VOP1 */
1532 #define DO_QABS8(x) do { \
1533     if (x == (int8_t)0x80) { \
1534         x = 0x7f; \
1535         SET_QC(); \
1536     } else if (x < 0) { \
1537         x = -x; \
1538     }} while (0)
1539 uint32_t HELPER(neon_qabs_s8)(CPUState *env, uint32_t x)
1540 {
1541     neon_s8 vec;
1542     NEON_UNPACK(neon_s8, vec, x);
1543     DO_QABS8(vec.v1);
1544     DO_QABS8(vec.v2);
1545     DO_QABS8(vec.v3);
1546     DO_QABS8(vec.v4);
1547     NEON_PACK(neon_s8, x, vec);
1548     return x;
1549 }
1550 #undef DO_QABS8
1551
1552 #define DO_QNEG8(x) do { \
1553     if (x == (int8_t)0x80) { \
1554         x = 0x7f; \
1555         SET_QC(); \
1556     } else { \
1557         x = -x; \
1558     }} while (0)
1559 uint32_t HELPER(neon_qneg_s8)(CPUState *env, uint32_t x)
1560 {
1561     neon_s8 vec;
1562     NEON_UNPACK(neon_s8, vec, x);
1563     DO_QNEG8(vec.v1);
1564     DO_QNEG8(vec.v2);
1565     DO_QNEG8(vec.v3);
1566     DO_QNEG8(vec.v4);
1567     NEON_PACK(neon_s8, x, vec);
1568     return x;
1569 }
1570 #undef DO_QNEG8
1571
1572 #define DO_QABS16(x) do { \
1573     if (x == (int16_t)0x8000) { \
1574         x = 0x7fff; \
1575         SET_QC(); \
1576     } else if (x < 0) { \
1577         x = -x; \
1578     }} while (0)
1579 uint32_t HELPER(neon_qabs_s16)(CPUState *env, uint32_t x)
1580 {
1581     neon_s16 vec;
1582     NEON_UNPACK(neon_s16, vec, x);
1583     DO_QABS16(vec.v1);
1584     DO_QABS16(vec.v2);
1585     NEON_PACK(neon_s16, x, vec);
1586     return x;
1587 }
1588 #undef DO_QABS16
1589
1590 #define DO_QNEG16(x) do { \
1591     if (x == (int16_t)0x8000) { \
1592         x = 0x7fff; \
1593         SET_QC(); \
1594     } else { \
1595         x = -x; \
1596     }} while (0)
1597 uint32_t HELPER(neon_qneg_s16)(CPUState *env, uint32_t x)
1598 {
1599     neon_s16 vec;
1600     NEON_UNPACK(neon_s16, vec, x);
1601     DO_QNEG16(vec.v1);
1602     DO_QNEG16(vec.v2);
1603     NEON_PACK(neon_s16, x, vec);
1604     return x;
1605 }
1606 #undef DO_QNEG16
1607
1608 uint32_t HELPER(neon_qabs_s32)(CPUState *env, uint32_t x)
1609 {
1610     if (x == SIGNBIT) {
1611         SET_QC();
1612         x = ~SIGNBIT;
1613     } else if ((int32_t)x < 0) {
1614         x = -x;
1615     }
1616     return x;
1617 }
1618
1619 uint32_t HELPER(neon_qneg_s32)(CPUState *env, uint32_t x)
1620 {
1621     if (x == SIGNBIT) {
1622         SET_QC();
1623         x = ~SIGNBIT;
1624     } else {
1625         x = -x;
1626     }
1627     return x;
1628 }
1629
1630 /* NEON Float helpers.  */
1631 uint32_t HELPER(neon_min_f32)(uint32_t a, uint32_t b)
1632 {
1633     float32 f0 = vfp_itos(a);
1634     float32 f1 = vfp_itos(b);
1635     return (float32_compare_quiet(f0, f1, NFS) == -1) ? a : b;
1636 }
1637
1638 uint32_t HELPER(neon_max_f32)(uint32_t a, uint32_t b)
1639 {
1640     float32 f0 = vfp_itos(a);
1641     float32 f1 = vfp_itos(b);
1642     return (float32_compare_quiet(f0, f1, NFS) == 1) ? a : b;
1643 }
1644
1645 uint32_t HELPER(neon_abd_f32)(uint32_t a, uint32_t b)
1646 {
1647     float32 f0 = vfp_itos(a);
1648     float32 f1 = vfp_itos(b);
1649     return vfp_stoi((float32_compare_quiet(f0, f1, NFS) == 1)
1650                     ? float32_sub(f0, f1, NFS)
1651                     : float32_sub(f1, f0, NFS));
1652 }
1653
1654 uint32_t HELPER(neon_add_f32)(uint32_t a, uint32_t b)
1655 {
1656     return vfp_stoi(float32_add(vfp_itos(a), vfp_itos(b), NFS));
1657 }
1658
1659 uint32_t HELPER(neon_sub_f32)(uint32_t a, uint32_t b)
1660 {
1661     return vfp_stoi(float32_sub(vfp_itos(a), vfp_itos(b), NFS));
1662 }
1663
1664 uint32_t HELPER(neon_mul_f32)(uint32_t a, uint32_t b)
1665 {
1666     return vfp_stoi(float32_mul(vfp_itos(a), vfp_itos(b), NFS));
1667 }
1668
1669 /* Floating point comparisons produce an integer result.  */
1670 #define NEON_VOP_FCMP(name, cmp) \
1671 uint32_t HELPER(neon_##name)(uint32_t a, uint32_t b) \
1672 { \
1673     if (float32_compare_quiet(vfp_itos(a), vfp_itos(b), NFS) cmp 0) \
1674         return ~0; \
1675     else \
1676         return 0; \
1677 }
1678
1679 NEON_VOP_FCMP(ceq_f32, ==)
1680 NEON_VOP_FCMP(cge_f32, >=)
1681 NEON_VOP_FCMP(cgt_f32, >)
1682
1683 uint32_t HELPER(neon_acge_f32)(uint32_t a, uint32_t b)
1684 {
1685     float32 f0 = float32_abs(vfp_itos(a));
1686     float32 f1 = float32_abs(vfp_itos(b));
1687     return (float32_compare_quiet(f0, f1,NFS) >= 0) ? ~0 : 0;
1688 }
1689
1690 uint32_t HELPER(neon_acgt_f32)(uint32_t a, uint32_t b)
1691 {
1692     float32 f0 = float32_abs(vfp_itos(a));
1693     float32 f1 = float32_abs(vfp_itos(b));
1694     return (float32_compare_quiet(f0, f1, NFS) > 0) ? ~0 : 0;
1695 }