qemu/target-sparc/vis_helper.c

   1 /*
   2  * VIS op helpers
   3  *
   4  *  Copyright (c) 2003-2005 Fabrice Bellard
   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 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 "cpu.h"
  21 #include "exec/helper-proto.h"
  22
  23 /* This function uses non-native bit order */
  24 #define GET_FIELD(X, FROM, TO)                                  \
  25     ((X) >> (63 - (TO)) & ((1ULL << ((TO) - (FROM) + 1)) - 1))
  26
  27 /* This function uses the order in the manuals, i.e. bit 0 is 2^0 */
  28 #define GET_FIELD_SP(X, FROM, TO)               \
  29     GET_FIELD(X, 63 - (TO), 63 - (FROM))
  30
  31 target_ulong helper_array8(target_ulong pixel_addr, target_ulong cubesize)
  32 {
  33     return (GET_FIELD_SP(pixel_addr, 60, 63) << (17 + 2 * cubesize)) |
  34         (GET_FIELD_SP(pixel_addr, 39, 39 + cubesize - 1) << (17 + cubesize)) |
  35         (GET_FIELD_SP(pixel_addr, 17 + cubesize - 1, 17) << 17) |
  36         (GET_FIELD_SP(pixel_addr, 56, 59) << 13) |
  37         (GET_FIELD_SP(pixel_addr, 35, 38) << 9) |
  38         (GET_FIELD_SP(pixel_addr, 13, 16) << 5) |
  39         (((pixel_addr >> 55) & 1) << 4) |
  40         (GET_FIELD_SP(pixel_addr, 33, 34) << 2) |
  41         GET_FIELD_SP(pixel_addr, 11, 12);
  42 }
  43
  44 #ifdef HOST_WORDS_BIGENDIAN
  45 #define VIS_B64(n) b[7 - (n)]
  46 #define VIS_W64(n) w[3 - (n)]
  47 #define VIS_SW64(n) sw[3 - (n)]
  48 #define VIS_L64(n) l[1 - (n)]
  49 #define VIS_B32(n) b[3 - (n)]
  50 #define VIS_W32(n) w[1 - (n)]
  51 #else
  52 #define VIS_B64(n) b[n]
  53 #define VIS_W64(n) w[n]
  54 #define VIS_SW64(n) sw[n]
  55 #define VIS_L64(n) l[n]
  56 #define VIS_B32(n) b[n]
  57 #define VIS_W32(n) w[n]
  58 #endif
  59
  60 typedef union {
  61     uint8_t b[8];
  62     uint16_t w[4];
  63     int16_t sw[4];
  64     uint32_t l[2];
  65     uint64_t ll;
  66     float64 d;
  67 } VIS64;
  68
  69 typedef union {
  70     uint8_t b[4];
  71     uint16_t w[2];
  72     uint32_t l;
  73     float32 f;
  74 } VIS32;
  75
  76 uint64_t helper_fpmerge(uint64_t src1, uint64_t src2)
  77 {
  78     VIS64 s, d;
  79
  80     s.ll = src1;
  81     d.ll = src2;
  82
  83     /* Reverse calculation order to handle overlap */
  84     d.VIS_B64(7) = s.VIS_B64(3);
  85     d.VIS_B64(6) = d.VIS_B64(3);
  86     d.VIS_B64(5) = s.VIS_B64(2);
  87     d.VIS_B64(4) = d.VIS_B64(2);
  88     d.VIS_B64(3) = s.VIS_B64(1);
  89     d.VIS_B64(2) = d.VIS_B64(1);
  90     d.VIS_B64(1) = s.VIS_B64(0);
  91     /* d.VIS_B64(0) = d.VIS_B64(0); */
  92
  93     return d.ll;
  94 }
  95
  96 uint64_t helper_fmul8x16(uint64_t src1, uint64_t src2)
  97 {
  98     VIS64 s, d;
  99     uint32_t tmp;
 100
 101     s.ll = src1;
 102     d.ll = src2;
 103
 104 #define PMUL(r)                                                 \
 105     tmp = (int32_t)d.VIS_SW64(r) * (int32_t)s.VIS_B64(r);       \
 106     if ((tmp & 0xff) > 0x7f) {                                  \
 107         tmp += 0x100;                                           \
 108     }                                                           \
 109     d.VIS_W64(r) = tmp >> 8;
 110
 111     PMUL(0);
 112     PMUL(1);
 113     PMUL(2);
 114     PMUL(3);
 115 #undef PMUL
 116
 117     return d.ll;
 118 }
 119
 120 uint64_t helper_fmul8x16al(uint64_t src1, uint64_t src2)
 121 {
 122     VIS64 s, d;
 123     uint32_t tmp;
 124
 125     s.ll = src1;
 126     d.ll = src2;
 127
 128 #define PMUL(r)                                                 \
 129     tmp = (int32_t)d.VIS_SW64(1) * (int32_t)s.VIS_B64(r);       \
 130     if ((tmp & 0xff) > 0x7f) {                                  \
 131         tmp += 0x100;                                           \
 132     }                                                           \
 133     d.VIS_W64(r) = tmp >> 8;
 134
 135     PMUL(0);
 136     PMUL(1);
 137     PMUL(2);
 138     PMUL(3);
 139 #undef PMUL
 140
 141     return d.ll;
 142 }
 143
 144 uint64_t helper_fmul8x16au(uint64_t src1, uint64_t src2)
 145 {
 146     VIS64 s, d;
 147     uint32_t tmp;
 148
 149     s.ll = src1;
 150     d.ll = src2;
 151
 152 #define PMUL(r)                                                 \
 153     tmp = (int32_t)d.VIS_SW64(0) * (int32_t)s.VIS_B64(r);       \
 154     if ((tmp & 0xff) > 0x7f) {                                  \
 155         tmp += 0x100;                                           \
 156     }                                                           \
 157     d.VIS_W64(r) = tmp >> 8;
 158
 159     PMUL(0);
 160     PMUL(1);
 161     PMUL(2);
 162     PMUL(3);
 163 #undef PMUL
 164
 165     return d.ll;
 166 }
 167
 168 uint64_t helper_fmul8sux16(uint64_t src1, uint64_t src2)
 169 {
 170     VIS64 s, d;
 171     uint32_t tmp;
 172
 173     s.ll = src1;
 174     d.ll = src2;
 175
 176 #define PMUL(r)                                                         \
 177     tmp = (int32_t)d.VIS_SW64(r) * ((int32_t)s.VIS_SW64(r) >> 8);       \
 178     if ((tmp & 0xff) > 0x7f) {                                          \
 179         tmp += 0x100;                                                   \
 180     }                                                                   \
 181     d.VIS_W64(r) = tmp >> 8;
 182
 183     PMUL(0);
 184     PMUL(1);
 185     PMUL(2);
 186     PMUL(3);
 187 #undef PMUL
 188
 189     return d.ll;
 190 }
 191
 192 uint64_t helper_fmul8ulx16(uint64_t src1, uint64_t src2)
 193 {
 194     VIS64 s, d;
 195     uint32_t tmp;
 196
 197     s.ll = src1;
 198     d.ll = src2;
 199
 200 #define PMUL(r)                                                         \
 201     tmp = (int32_t)d.VIS_SW64(r) * ((uint32_t)s.VIS_B64(r * 2));        \
 202     if ((tmp & 0xff) > 0x7f) {                                          \
 203         tmp += 0x100;                                                   \
 204     }                                                                   \
 205     d.VIS_W64(r) = tmp >> 8;
 206
 207     PMUL(0);
 208     PMUL(1);
 209     PMUL(2);
 210     PMUL(3);
 211 #undef PMUL
 212
 213     return d.ll;
 214 }
 215
 216 uint64_t helper_fmuld8sux16(uint64_t src1, uint64_t src2)
 217 {
 218     VIS64 s, d;
 219     uint32_t tmp;
 220
 221     s.ll = src1;
 222     d.ll = src2;
 223
 224 #define PMUL(r)                                                         \
 225     tmp = (int32_t)d.VIS_SW64(r) * ((int32_t)s.VIS_SW64(r) >> 8);       \
 226     if ((tmp & 0xff) > 0x7f) {                                          \
 227         tmp += 0x100;                                                   \
 228     }                                                                   \
 229     d.VIS_L64(r) = tmp;
 230
 231     /* Reverse calculation order to handle overlap */
 232     PMUL(1);
 233     PMUL(0);
 234 #undef PMUL
 235
 236     return d.ll;
 237 }
 238
 239 uint64_t helper_fmuld8ulx16(uint64_t src1, uint64_t src2)
 240 {
 241     VIS64 s, d;
 242     uint32_t tmp;
 243
 244     s.ll = src1;
 245     d.ll = src2;
 246
 247 #define PMUL(r)                                                         \
 248     tmp = (int32_t)d.VIS_SW64(r) * ((uint32_t)s.VIS_B64(r * 2));        \
 249     if ((tmp & 0xff) > 0x7f) {                                          \
 250         tmp += 0x100;                                                   \
 251     }                                                                   \
 252     d.VIS_L64(r) = tmp;
 253
 254     /* Reverse calculation order to handle overlap */
 255     PMUL(1);
 256     PMUL(0);
 257 #undef PMUL
 258
 259     return d.ll;
 260 }
 261
 262 uint64_t helper_fexpand(uint64_t src1, uint64_t src2)
 263 {
 264     VIS32 s;
 265     VIS64 d;
 266
 267     s.l = (uint32_t)src1;
 268     d.ll = src2;
 269     d.VIS_W64(0) = s.VIS_B32(0) << 4;
 270     d.VIS_W64(1) = s.VIS_B32(1) << 4;
 271     d.VIS_W64(2) = s.VIS_B32(2) << 4;
 272     d.VIS_W64(3) = s.VIS_B32(3) << 4;
 273
 274     return d.ll;
 275 }
 276
 277 #define VIS_HELPER(name, F)                             \
 278     uint64_t name##16(uint64_t src1, uint64_t src2)     \
 279     {                                                   \
 280         VIS64 s, d;                                     \
 281                                                         \
 282         s.ll = src1;                                    \
 283         d.ll = src2;                                    \
 284                                                         \
 285         d.VIS_W64(0) = F(d.VIS_W64(0), s.VIS_W64(0));   \
 286         d.VIS_W64(1) = F(d.VIS_W64(1), s.VIS_W64(1));   \
 287         d.VIS_W64(2) = F(d.VIS_W64(2), s.VIS_W64(2));   \
 288         d.VIS_W64(3) = F(d.VIS_W64(3), s.VIS_W64(3));   \
 289                                                         \
 290         return d.ll;                                    \
 291     }                                                   \
 292                                                         \
 293     uint32_t name##16s(uint32_t src1, uint32_t src2)    \
 294     {                                                   \
 295         VIS32 s, d;                                     \
 296                                                         \
 297         s.l = src1;                                     \
 298         d.l = src2;                                     \
 299                                                         \
 300         d.VIS_W32(0) = F(d.VIS_W32(0), s.VIS_W32(0));   \
 301         d.VIS_W32(1) = F(d.VIS_W32(1), s.VIS_W32(1));   \
 302                                                         \
 303         return d.l;                                     \
 304     }                                                   \
 305                                                         \
 306     uint64_t name##32(uint64_t src1, uint64_t src2)     \
 307     {                                                   \
 308         VIS64 s, d;                                     \
 309                                                         \
 310         s.ll = src1;                                    \
 311         d.ll = src2;                                    \
 312                                                         \
 313         d.VIS_L64(0) = F(d.VIS_L64(0), s.VIS_L64(0));   \
 314         d.VIS_L64(1) = F(d.VIS_L64(1), s.VIS_L64(1));   \
 315                                                         \
 316         return d.ll;                                    \
 317     }                                                   \
 318                                                         \
 319     uint32_t name##32s(uint32_t src1, uint32_t src2)    \
 320     {                                                   \
 321         VIS32 s, d;                                     \
 322                                                         \
 323         s.l = src1;                                     \
 324         d.l = src2;                                     \
 325                                                         \
 326         d.l = F(d.l, s.l);                              \
 327                                                         \
 328         return d.l;                                     \
 329     }
 330
 331 #define FADD(a, b) ((a) + (b))
 332 #define FSUB(a, b) ((a) - (b))
 333 VIS_HELPER(helper_fpadd, FADD)
 334 VIS_HELPER(helper_fpsub, FSUB)
 335
 336 #define VIS_CMPHELPER(name, F)                                    \
 337     uint64_t name##16(uint64_t src1, uint64_t src2)               \
 338     {                                                             \
 339         VIS64 s, d;                                               \
 340                                                                   \
 341         s.ll = src1;                                              \
 342         d.ll = src2;                                              \
 343                                                                   \
 344         d.VIS_W64(0) = F(s.VIS_W64(0), d.VIS_W64(0)) ? 1 : 0;     \
 345         d.VIS_W64(0) |= F(s.VIS_W64(1), d.VIS_W64(1)) ? 2 : 0;    \
 346         d.VIS_W64(0) |= F(s.VIS_W64(2), d.VIS_W64(2)) ? 4 : 0;    \
 347         d.VIS_W64(0) |= F(s.VIS_W64(3), d.VIS_W64(3)) ? 8 : 0;    \
 348         d.VIS_W64(1) = d.VIS_W64(2) = d.VIS_W64(3) = 0;           \
 349                                                                   \
 350         return d.ll;                                              \
 351     }                                                             \
 352                                                                   \
 353     uint64_t name##32(uint64_t src1, uint64_t src2)               \
 354     {                                                             \
 355         VIS64 s, d;                                               \
 356                                                                   \
 357         s.ll = src1;                                              \
 358         d.ll = src2;                                              \
 359                                                                   \
 360         d.VIS_L64(0) = F(s.VIS_L64(0), d.VIS_L64(0)) ? 1 : 0;     \
 361         d.VIS_L64(0) |= F(s.VIS_L64(1), d.VIS_L64(1)) ? 2 : 0;    \
 362         d.VIS_L64(1) = 0;                                         \
 363                                                                   \
 364         return d.ll;                                              \
 365     }
 366
 367 #define FCMPGT(a, b) ((a) > (b))
 368 #define FCMPEQ(a, b) ((a) == (b))
 369 #define FCMPLE(a, b) ((a) <= (b))
 370 #define FCMPNE(a, b) ((a) != (b))
 371
 372 VIS_CMPHELPER(helper_fcmpgt, FCMPGT)
 373 VIS_CMPHELPER(helper_fcmpeq, FCMPEQ)
 374 VIS_CMPHELPER(helper_fcmple, FCMPLE)
 375 VIS_CMPHELPER(helper_fcmpne, FCMPNE)
 376
 377 uint64_t helper_pdist(uint64_t sum, uint64_t src1, uint64_t src2)
 378 {
 379     int i;
 380     for (i = 0; i < 8; i++) {
 381         int s1, s2;
 382
 383         s1 = (src1 >> (56 - (i * 8))) & 0xff;
 384         s2 = (src2 >> (56 - (i * 8))) & 0xff;
 385
 386         /* Absolute value of difference. */
 387         s1 -= s2;
 388         if (s1 < 0) {
 389             s1 = -s1;
 390         }
 391
 392         sum += s1;
 393     }
 394
 395     return sum;
 396 }
 397
 398 uint32_t helper_fpack16(uint64_t gsr, uint64_t rs2)
 399 {
 400     int scale = (gsr >> 3) & 0xf;
 401     uint32_t ret = 0;
 402     int byte;
 403
 404     for (byte = 0; byte < 4; byte++) {
 405         uint32_t val;
 406         int16_t src = rs2 >> (byte * 16);
 407         int32_t scaled = src << scale;
 408         int32_t from_fixed = scaled >> 7;
 409
 410         val = (from_fixed < 0 ?  0 :
 411                from_fixed > 255 ?  255 : from_fixed);
 412
 413         ret |= val << (8 * byte);
 414     }
 415
 416     return ret;
 417 }
 418
 419 uint64_t helper_fpack32(uint64_t gsr, uint64_t rs1, uint64_t rs2)
 420 {
 421     int scale = (gsr >> 3) & 0x1f;
 422     uint64_t ret = 0;
 423     int word;
 424
 425     ret = (rs1 << 8) & ~(0x000000ff000000ffULL);
 426     for (word = 0; word < 2; word++) {
 427         uint64_t val;
 428         int32_t src = rs2 >> (word * 32);
 429         int64_t scaled = (int64_t)src << scale;
 430         int64_t from_fixed = scaled >> 23;
 431
 432         val = (from_fixed < 0 ? 0 :
 433                (from_fixed > 255) ? 255 : from_fixed);
 434
 435         ret |= val << (32 * word);
 436     }
 437
 438     return ret;
 439 }
 440
 441 uint32_t helper_fpackfix(uint64_t gsr, uint64_t rs2)
 442 {
 443     int scale = (gsr >> 3) & 0x1f;
 444     uint32_t ret = 0;
 445     int word;
 446
 447     for (word = 0; word < 2; word++) {
 448         uint32_t val;
 449         int32_t src = rs2 >> (word * 32);
 450         int64_t scaled = src << scale;
 451         int64_t from_fixed = scaled >> 16;
 452
 453         val = (from_fixed < -32768 ? -32768 :
 454                from_fixed > 32767 ?  32767 : from_fixed);
 455
 456         ret |= (val & 0xffff) << (word * 16);
 457     }
 458
 459     return ret;
 460 }
 461
 462 uint64_t helper_bshuffle(uint64_t gsr, uint64_t src1, uint64_t src2)
 463 {
 464     union {
 465         uint64_t ll[2];
 466         uint8_t b[16];
 467     } s;
 468     VIS64 r;
 469     uint32_t i, mask, host;
 470
 471     /* Set up S such that we can index across all of the bytes.  */
 472 #ifdef HOST_WORDS_BIGENDIAN
 473     s.ll[0] = src1;
 474     s.ll[1] = src2;
 475     host = 0;
 476 #else
 477     s.ll[1] = src1;
 478     s.ll[0] = src2;
 479     host = 15;
 480 #endif
 481     mask = gsr >> 32;
 482
 483     for (i = 0; i < 8; ++i) {
 484         unsigned e = (mask >> (28 - i*4)) & 0xf;
 485         r.VIS_B64(i) = s.b[e ^ host];
 486     }
 487
 488     return r.ll;
 489 }