test/MC/ARM/basic-thumb-instructions.s

   1 @---
   2 @ Run these test in both Thumb1 and Thumb2 modes, as all of the encodings
   3 @ should be valid, and parse the same, in both.
   4 @---
   5 @ RUN: llvm-mc -triple=thumbv6-apple-darwin -show-encoding < %s | FileCheck %s
   6 @ RUN: llvm-mc -triple=thumbv7-apple-darwin -show-encoding < %s | FileCheck %s
   7   .syntax unified
   8   .globl _func
   9
  10 @ Check that the assembler can handle the documented syntax from the ARM ARM.
  11 @ For complex constructs like shifter operands, check more thoroughly for them
  12 @ once then spot check that following instructions accept the form generally.
  13 @ This gives us good coverage while keeping the overall size of the test
  14 @ more reasonable.
  15
  16
  17 @ FIXME: Some 3-operand instructions have a 2-operand assembly syntax.
  18
  19 _func:
  20 @ CHECK: _func
  21
  22 @------------------------------------------------------------------------------
  23 @ ADC (register)
  24 @------------------------------------------------------------------------------
  25         adcs r4, r6
  26
  27 @ CHECK: adcs   r4, r6                  @ encoding: [0x74,0x41]
  28
  29
  30 @------------------------------------------------------------------------------
  31 @ ADD (immediate)
  32 @------------------------------------------------------------------------------
  33         adds r1, r2, #3
  34 @ When Rd is not explicitly specified, encoding T2 is preferred even though
  35 @ the literal is in the range [0,7] which would allow encoding T1.
  36         adds r2, #3
  37         adds r2, #8
  38
  39 @ CHECK: adds   r1, r2, #3              @ encoding: [0xd1,0x1c]
  40 @ CHECK: adds   r2, #3                  @ encoding: [0x03,0x32]
  41 @ CHECK: adds   r2, #8                  @ encoding: [0x08,0x32]
  42
  43
  44 @------------------------------------------------------------------------------
  45 @ ADD (register)
  46 @------------------------------------------------------------------------------
  47         adds r1, r2, r3
  48         add r2, r8
  49
  50 @ CHECK: adds   r1, r2, r3              @ encoding: [0xd1,0x18]
  51 @ CHECK: add    r2, r8                  @ encoding: [0x42,0x44]
  52
  53
  54 @------------------------------------------------------------------------------
  55 @ ADD (SP plus immediate)
  56 @------------------------------------------------------------------------------
  57         add sp, #4
  58         add sp, #508
  59         add sp, sp, #4
  60         add r2, sp, #8
  61         add r2, sp, #1020
  62         add sp, sp, #-8
  63         add sp, #-8
  64
  65 @ CHECK: add    sp, #4                  @ encoding: [0x01,0xb0]
  66 @ CHECK: add    sp, #508                @ encoding: [0x7f,0xb0]
  67 @ CHECK: add    sp, #4                  @ encoding: [0x01,0xb0]
  68 @ CHECK: add    r2, sp, #8              @ encoding: [0x02,0xaa]
  69 @ CHECK: add    r2, sp, #1020           @ encoding: [0xff,0xaa]
  70 @ CHECK: sub    sp, #8                  @ encoding: [0x82,0xb0]
  71 @ CHECK: sub    sp, #8                  @ encoding: [0x82,0xb0]
  72
  73
  74 @------------------------------------------------------------------------------
  75 @ ADD (SP plus register)
  76 @------------------------------------------------------------------------------
  77         add sp, r3
  78         add r2, sp, r2
  79
  80 @ CHECK: add    sp, r3                  @ encoding: [0x9d,0x44]
  81 @ CHECK: add    r2, sp, r2              @ encoding: [0x6a,0x44]
  82
  83
  84 @------------------------------------------------------------------------------
  85 @ ADR
  86 @------------------------------------------------------------------------------
  87         adr r2, _baz
  88         adr r5, #0
  89         adr r2, #4
  90         adr r3, #1020
  91
  92 @ CHECK: adr    r2, _baz                @ encoding: [A,0xa2]
  93             @   fixup A - offset: 0, value: _baz, kind: fixup_thumb_adr_pcrel_10
  94 @ CHECK: adr    r5, #0                  @ encoding: [0x00,0xa5]
  95 @ CHECK: adr    r2, #4                  @ encoding: [0x01,0xa2]
  96 @ CHECK: adr    r3, #1020               @ encoding: [0xff,0xa3]
  97
  98 @------------------------------------------------------------------------------
  99 @ ASR (immediate)
 100 @------------------------------------------------------------------------------
 101         asrs r2, r3, #32
 102         asrs r2, r3, #5
 103         asrs r2, r3, #1
 104         asrs r5, #21
 105         asrs r5, r5, #21
 106         asrs r3, r5, #21
 107
 108 @ CHECK: asrs   r2, r3, #32             @ encoding: [0x1a,0x10]
 109 @ CHECK: asrs   r2, r3, #5              @ encoding: [0x5a,0x11]
 110 @ CHECK: asrs   r2, r3, #1              @ encoding: [0x5a,0x10]
 111 @ CHECK: asrs   r5, r5, #21             @ encoding: [0x6d,0x15]
 112 @ CHECK: asrs   r5, r5, #21             @ encoding: [0x6d,0x15]
 113 @ CHECK: asrs   r3, r5, #21             @ encoding: [0x6b,0x15]
 114
 115
 116 @------------------------------------------------------------------------------
 117 @ ASR (register)
 118 @------------------------------------------------------------------------------
 119         asrs r5, r2
 120
 121 @ CHECK: asrs   r5, r2                  @ encoding: [0x15,0x41]
 122
 123
 124 @------------------------------------------------------------------------------
 125 @ B
 126 @------------------------------------------------------------------------------
 127         b _baz
 128         beq _bar
 129         b       #1838
 130         b       #-420
 131         beq     #336
 132         beq     #160
 133
 134 @ CHECK: b      _baz                    @ encoding: [A,0xe0'A']
 135              @   fixup A - offset: 0, value: _baz, kind: fixup_arm_thumb_br
 136 @ CHECK: beq    _bar                    @ encoding: [A,0xd0]
 137              @   fixup A - offset: 0, value: _bar, kind: fixup_arm_thumb_bcc
 138 @ CHECK: b       #1838                   @ encoding: [0x97,0xe3]
 139 @ CHECK: b       #-420                   @ encoding: [0x2e,0xe7]
 140 @ CHECK: beq     #336                    @ encoding: [0xa8,0xd0]
 141 @ CHECK: beq     #160                    @ encoding: [0x50,0xd0]
 142
 143 @------------------------------------------------------------------------------
 144 @ BL/BLX
 145 @------------------------------------------------------------------------------
 146         blx     #884800
 147         blx     #1769600
 148
 149 @ CHECK: blx     #884800                 @ encoding: [0xd8,0xf0,0x20,0xe8]
 150 @ CHECK: blx     #1769600                @ encoding: [0xb0,0xf1,0x40,0xe8]
 151
 152 @------------------------------------------------------------------------------
 153 @ BICS
 154 @------------------------------------------------------------------------------
 155         bics r1, r6
 156
 157 @ CHECK: bics   r1, r6                  @ encoding: [0xb1,0x43]
 158
 159
 160 @------------------------------------------------------------------------------
 161 @ BKPT
 162 @------------------------------------------------------------------------------
 163         bkpt #0
 164         bkpt #255
 165
 166 @ CHECK: bkpt   #0                      @ encoding: [0x00,0xbe]
 167 @ CHECK: bkpt   #255                    @ encoding: [0xff,0xbe]
 168
 169
 170 @------------------------------------------------------------------------------
 171 @ BL/BLX (immediate)
 172 @------------------------------------------------------------------------------
 173         bl _bar
 174         blx _baz
 175
 176 @ CHECK: bl     _bar                    @ encoding: [A,0xf0'A',A,0xd0'A']
 177              @   fixup A - offset: 0, value: _bar, kind: fixup_arm_thumb_bl
 178 @ CHECK: blx    _baz                    @ encoding: [A,0xf0'A',A,0xc0'A']
 179              @   fixup A - offset: 0, value: _baz, kind: fixup_arm_thumb_blx
 180
 181
 182 @------------------------------------------------------------------------------
 183 @ BLX (register)
 184 @------------------------------------------------------------------------------
 185         blx r4
 186
 187 @ CHECK: blx    r4                      @ encoding: [0xa0,0x47]
 188
 189
 190 @------------------------------------------------------------------------------
 191 @ BX
 192 @------------------------------------------------------------------------------
 193         bx r2
 194
 195 @ CHECK: bx     r2                      @ encoding: [0x10,0x47]
 196
 197
 198 @------------------------------------------------------------------------------
 199 @ CMN
 200 @------------------------------------------------------------------------------
 201
 202         cmn r5, r1
 203
 204 @ CHECK: cmn    r5, r1                  @ encoding: [0xcd,0x42]
 205
 206
 207 @------------------------------------------------------------------------------
 208 @ CMP
 209 @------------------------------------------------------------------------------
 210         cmp r6, #32
 211         cmp r3, r4
 212         cmp r8, r1
 213
 214 @ CHECK: cmp    r6, #32                 @ encoding: [0x20,0x2e]
 215 @ CHECK: cmp    r3, r4                  @ encoding: [0xa3,0x42]
 216 @ CHECK: cmp    r8, r1                  @ encoding: [0x88,0x45]
 217
 218 @------------------------------------------------------------------------------
 219 @ EOR
 220 @------------------------------------------------------------------------------
 221         eors r4, r5
 222
 223 @ CHECK: eors   r4, r5                  @ encoding: [0x6c,0x40]
 224
 225
 226 @------------------------------------------------------------------------------
 227 @ LDM
 228 @------------------------------------------------------------------------------
 229         ldm r3, {r0, r1, r2, r3, r4, r5, r6, r7}
 230         ldm r2!, {r1, r3, r4, r5, r7}
 231         ldm r1, {r1}
 232
 233 @ CHECK: ldm    r3, {r0, r1, r2, r3, r4, r5, r6, r7} @ encoding: [0xff,0xcb]
 234 @ CHECK: ldm    r2!, {r1, r3, r4, r5, r7} @ encoding: [0xba,0xca]
 235 @ CHECK: ldm    r1, {r1}                @ encoding: [0x02,0xc9]
 236
 237
 238 @------------------------------------------------------------------------------
 239 @ LDR (immediate)
 240 @------------------------------------------------------------------------------
 241         ldr r1, [r5]
 242         ldr r2, [r6, #32]
 243         ldr r3, [r7, #124]
 244         ldr r1, [sp]
 245         ldr r2, [sp, #24]
 246         ldr r3, [sp, #1020]
 247
 248
 249 @ CHECK: ldr    r1, [r5]                @ encoding: [0x29,0x68]
 250 @ CHECK: ldr    r2, [r6, #32]           @ encoding: [0x32,0x6a]
 251 @ CHECK: ldr    r3, [r7, #124]          @ encoding: [0xfb,0x6f]
 252 @ CHECK: ldr    r1, [sp]                @ encoding: [0x00,0x99]
 253 @ CHECK: ldr    r2, [sp, #24]           @ encoding: [0x06,0x9a]
 254 @ CHECK: ldr    r3, [sp, #1020]         @ encoding: [0xff,0x9b]
 255
 256
 257 @------------------------------------------------------------------------------
 258 @ LDR (literal)
 259 @------------------------------------------------------------------------------
 260         ldr r1, _foo
 261         ldr     r3, #604
 262         ldr     r3, #368
 263
 264 @ CHECK: ldr    r1, _foo                @ encoding: [A,0x49]
 265              @   fixup A - offset: 0, value: _foo, kind: fixup_arm_thumb_cp
 266 @ CHECK: ldr     r3, [pc, #604]         @ encoding: [0x97,0x4b]
 267 @ CHECK: ldr     r3, [pc, #368]         @ encoding: [0x5c,0x4b]
 268
 269 @------------------------------------------------------------------------------
 270 @ LDR (register)
 271 @------------------------------------------------------------------------------
 272         ldr r1, [r2, r3]
 273
 274 @ CHECK: ldr    r1, [r2, r3]            @ encoding: [0xd1,0x58]
 275
 276
 277 @------------------------------------------------------------------------------
 278 @ LDRB (immediate)
 279 @------------------------------------------------------------------------------
 280         ldrb r4, [r3]
 281         ldrb r5, [r6, #0]
 282         ldrb r6, [r7, #31]
 283
 284 @ CHECK: ldrb   r4, [r3]                @ encoding: [0x1c,0x78]
 285 @ CHECK: ldrb   r5, [r6]                @ encoding: [0x35,0x78]
 286 @ CHECK: ldrb   r6, [r7, #31]           @ encoding: [0xfe,0x7f]
 287
 288
 289 @------------------------------------------------------------------------------
 290 @ LDRB (register)
 291 @------------------------------------------------------------------------------
 292         ldrb r6, [r4, r5]
 293
 294 @ CHECK: ldrb   r6, [r4, r5]            @ encoding: [0x66,0x5d]
 295
 296
 297 @------------------------------------------------------------------------------
 298 @ LDRH (immediate)
 299 @------------------------------------------------------------------------------
 300         ldrh r3, [r3]
 301         ldrh r4, [r6, #2]
 302         ldrh r5, [r7, #62]
 303
 304 @ CHECK: ldrh   r3, [r3]                @ encoding: [0x1b,0x88]
 305 @ CHECK: ldrh   r4, [r6, #2]            @ encoding: [0x74,0x88]
 306 @ CHECK: ldrh   r5, [r7, #62]           @ encoding: [0xfd,0x8f]
 307
 308
 309 @------------------------------------------------------------------------------
 310 @ LDRH (register)
 311 @------------------------------------------------------------------------------
 312         ldrh r6, [r2, r6]
 313
 314 @ CHECK: ldrh   r6, [r2, r6]            @ encoding: [0x96,0x5b]
 315
 316
 317 @------------------------------------------------------------------------------
 318 @ LDRSB/LDRSH
 319 @------------------------------------------------------------------------------
 320         ldrsb r6, [r2, r6]
 321         ldrsh r3, [r7, r1]
 322
 323 @ CHECK: ldrsb  r6, [r2, r6]            @ encoding: [0x96,0x57]
 324 @ CHECK: ldrsh  r3, [r7, r1]            @ encoding: [0x7b,0x5e]
 325
 326
 327 @------------------------------------------------------------------------------
 328 @ LSL (immediate)
 329 @------------------------------------------------------------------------------
 330         lsls r4, r5, #0
 331         lsls r4, r5, #4
 332         lsls r3, #12
 333         lsls r3, r3, #12
 334         lsls r1, r3, #12
 335
 336 @ CHECK: lsls   r4, r5, #0              @ encoding: [0x2c,0x00]
 337 @ CHECK: lsls   r4, r5, #4              @ encoding: [0x2c,0x01]
 338 @ CHECK: lsls   r3, r3, #12             @ encoding: [0x1b,0x03]
 339 @ CHECK: lsls   r3, r3, #12             @ encoding: [0x1b,0x03]
 340 @ CHECK: lsls   r1, r3, #12             @ encoding: [0x19,0x03]
 341
 342
 343 @------------------------------------------------------------------------------
 344 @ LSL (register)
 345 @------------------------------------------------------------------------------
 346         lsls r2, r6
 347
 348 @ CHECK: lsls   r2, r6                  @ encoding: [0xb2,0x40]
 349
 350
 351 @------------------------------------------------------------------------------
 352 @ LSR (immediate)
 353 @------------------------------------------------------------------------------
 354         lsrs r1, r3, #1
 355         lsrs r1, r3, #32
 356         lsrs r4, #20
 357         lsrs r4, r4, #20
 358         lsrs r2, r4, #20
 359
 360 @ CHECK: lsrs   r1, r3, #1              @ encoding: [0x59,0x08]
 361 @ CHECK: lsrs   r1, r3, #32             @ encoding: [0x19,0x08]
 362 @ CHECK: lsrs   r4, r4, #20             @ encoding: [0x24,0x0d]
 363 @ CHECK: lsrs   r4, r4, #20             @ encoding: [0x24,0x0d]
 364 @ CHECK: lsrs   r2, r4, #20             @ encoding: [0x22,0x0d]
 365
 366
 367 @------------------------------------------------------------------------------
 368 @ LSR (register)
 369 @------------------------------------------------------------------------------
 370         lsrs r2, r6
 371
 372 @ CHECK: lsrs   r2, r6                  @ encoding: [0xf2,0x40]
 373
 374
 375 @------------------------------------------------------------------------------
 376 @ MOV (immediate)
 377 @------------------------------------------------------------------------------
 378         movs r2, #0
 379         movs r2, #255
 380         movs r2, #23
 381
 382 @ CHECK: movs   r2, #0                  @ encoding: [0x00,0x22]
 383 @ CHECK: movs   r2, #255                @ encoding: [0xff,0x22]
 384 @ CHECK: movs   r2, #23                 @ encoding: [0x17,0x22]
 385
 386
 387 @------------------------------------------------------------------------------
 388 @ MOV (register)
 389 @------------------------------------------------------------------------------
 390         mov r3, r4
 391         movs r1, r3
 392
 393 @ CHECK: mov    r3, r4                  @ encoding: [0x23,0x46]
 394 @ CHECK: movs   r1, r3                  @ encoding: [0x19,0x00]
 395
 396
 397 @------------------------------------------------------------------------------
 398 @ MUL
 399 @------------------------------------------------------------------------------
 400         muls r1, r2, r1
 401         muls r2, r2, r3
 402         muls r3, r4
 403
 404 @ CHECK: muls   r1, r2, r1              @ encoding: [0x51,0x43]
 405 @ CHECK: muls   r2, r3, r2              @ encoding: [0x5a,0x43]
 406 @ CHECK: muls   r3, r4, r3              @ encoding: [0x63,0x43]
 407
 408
 409 @------------------------------------------------------------------------------
 410 @ MVN
 411 @------------------------------------------------------------------------------
 412         mvns r6, r3
 413
 414 @ CHECK: mvns   r6, r3                  @ encoding: [0xde,0x43]
 415
 416
 417 @------------------------------------------------------------------------------
 418 @ NEG
 419 @------------------------------------------------------------------------------
 420         negs r3, r4
 421
 422 @ CHECK: rsbs   r3, r4, #0              @ encoding: [0x63,0x42]
 423
 424 @------------------------------------------------------------------------------
 425 @ ORR
 426 @------------------------------------------------------------------------------
 427         orrs  r3, r4
 428
 429 @ CHECK-ERRORS:         orrs    r3, r4                  @ encoding: [0x23,0x43]
 430
 431
 432 @------------------------------------------------------------------------------
 433 @ POP
 434 @------------------------------------------------------------------------------
 435         pop {r2, r3, r6}
 436
 437 @ CHECK: pop    {r2, r3, r6}            @ encoding: [0x4c,0xbc]
 438
 439
 440 @------------------------------------------------------------------------------
 441 @ PUSH
 442 @------------------------------------------------------------------------------
 443         push {r1, r2, r7}
 444
 445 @ CHECK: push   {r1, r2, r7}            @ encoding: [0x86,0xb4]
 446
 447
 448 @------------------------------------------------------------------------------
 449 @ REV/REV16/REVSH
 450 @------------------------------------------------------------------------------
 451         rev r6, r3
 452         rev16 r7, r2
 453         revsh r5, r1
 454
 455 @ CHECK: rev    r6, r3                  @ encoding: [0x1e,0xba]
 456 @ CHECK: rev16  r7, r2                  @ encoding: [0x57,0xba]
 457 @ CHECK: revsh  r5, r1                  @ encoding: [0xcd,0xba]
 458
 459
 460 @------------------------------------------------------------------------------
 461 @ ROR
 462 @------------------------------------------------------------------------------
 463         rors r2, r7
 464
 465 @ CHECK: rors   r2, r7                  @ encoding: [0xfa,0x41]
 466
 467
 468 @------------------------------------------------------------------------------
 469 @ RSB
 470 @------------------------------------------------------------------------------
 471         rsbs r1, r3, #0
 472
 473 @ CHECK: rsbs   r1, r3, #0              @ encoding: [0x59,0x42]
 474
 475
 476 @------------------------------------------------------------------------------
 477 @ SBC
 478 @------------------------------------------------------------------------------
 479         sbcs r4, r3
 480
 481 @ CHECK: sbcs   r4, r3                  @ encoding: [0x9c,0x41]
 482
 483
 484 @------------------------------------------------------------------------------
 485 @ SETEND
 486 @------------------------------------------------------------------------------
 487         setend be
 488         setend le
 489
 490 @ CHECK: setend be                      @ encoding: [0x58,0xb6]
 491 @ CHECK: setend le                      @ encoding: [0x50,0xb6]
 492
 493
 494 @------------------------------------------------------------------------------
 495 @ STM
 496 @------------------------------------------------------------------------------
 497         stm r1!, {r2, r6}
 498         stm r1!, {r1, r2, r3, r7}
 499
 500 @ CHECK: stm    r1!, {r2, r6}           @ encoding: [0x44,0xc1]
 501 @ CHECK: stm    r1!, {r1, r2, r3, r7}   @ encoding: [0x8e,0xc1]
 502
 503
 504 @------------------------------------------------------------------------------
 505 @ STR (immediate)
 506 @------------------------------------------------------------------------------
 507         str r2, [r7]
 508         str r2, [r7, #0]
 509         str r5, [r1, #4]
 510         str r3, [r7, #124]
 511         str r2, [sp]
 512         str r3, [sp, #0]
 513         str r4, [sp, #20]
 514         str r5, [sp, #1020]
 515
 516 @ CHECK: str    r2, [r7]                @ encoding: [0x3a,0x60]
 517 @ CHECK: str    r2, [r7]                @ encoding: [0x3a,0x60]
 518 @ CHECK: str    r5, [r1, #4]            @ encoding: [0x4d,0x60]
 519 @ CHECK: str    r3, [r7, #124]          @ encoding: [0xfb,0x67]
 520 @ CHECK: str    r2, [sp]                @ encoding: [0x00,0x92]
 521 @ CHECK: str    r3, [sp]                @ encoding: [0x00,0x93]
 522 @ CHECK: str    r4, [sp, #20]           @ encoding: [0x05,0x94]
 523 @ CHECK: str    r5, [sp, #1020]         @ encoding: [0xff,0x95]
 524
 525
 526 @------------------------------------------------------------------------------
 527 @ STR (register)
 528 @------------------------------------------------------------------------------
 529         str r2, [r7, r3]
 530
 531 @ CHECK: str    r2, [r7, r3]            @ encoding: [0xfa,0x50]
 532
 533
 534 @------------------------------------------------------------------------------
 535 @ STRB (immediate)
 536 @------------------------------------------------------------------------------
 537         strb r4, [r3]
 538         strb r5, [r6, #0]
 539         strb r6, [r7, #31]
 540
 541 @ CHECK: strb   r4, [r3]                @ encoding: [0x1c,0x70]
 542 @ CHECK: strb   r5, [r6]                @ encoding: [0x35,0x70]
 543 @ CHECK: strb   r6, [r7, #31]           @ encoding: [0xfe,0x77]
 544
 545
 546 @------------------------------------------------------------------------------
 547 @ STRB (register)
 548 @------------------------------------------------------------------------------
 549         strb r6, [r4, r5]
 550
 551 @ CHECK: strb   r6, [r4, r5]            @ encoding: [0x66,0x55]
 552
 553
 554 @------------------------------------------------------------------------------
 555 @ STRH (immediate)
 556 @------------------------------------------------------------------------------
 557         strh r3, [r3]
 558         strh r4, [r6, #2]
 559         strh r5, [r7, #62]
 560
 561 @ CHECK: strh   r3, [r3]                @ encoding: [0x1b,0x80]
 562 @ CHECK: strh   r4, [r6, #2]            @ encoding: [0x74,0x80]
 563 @ CHECK: strh   r5, [r7, #62]           @ encoding: [0xfd,0x87]
 564
 565
 566 @------------------------------------------------------------------------------
 567 @ STRH (register)
 568 @------------------------------------------------------------------------------
 569         strh r6, [r2, r6]
 570
 571 @ CHECK: strh   r6, [r2, r6]            @ encoding: [0x96,0x53]
 572
 573
 574 @------------------------------------------------------------------------------
 575 @ SUB (immediate)
 576 @------------------------------------------------------------------------------
 577         subs r1, r2, #3
 578         subs r2, #3
 579         subs r2, #8
 580
 581 @ CHECK: subs   r1, r2, #3              @ encoding: [0xd1,0x1e]
 582 @ CHECK: subs   r2, #3                  @ encoding: [0x03,0x3a]
 583 @ CHECK: subs   r2, #8                  @ encoding: [0x08,0x3a]
 584
 585
 586 @------------------------------------------------------------------------------
 587 @ SUB (SP minus immediate)
 588 @------------------------------------------------------------------------------
 589         sub sp, #12
 590         sub sp, sp, #508
 591
 592 @ CHECK: sub    sp, #12                 @ encoding: [0x83,0xb0]
 593 @ CHECK: sub    sp, #508                @ encoding: [0xff,0xb0]
 594
 595
 596 @------------------------------------------------------------------------------
 597 @ SUB (register)
 598 @------------------------------------------------------------------------------
 599         subs r1, r2, r3
 600
 601 @ CHECK: subs   r1, r2, r3              @ encoding: [0xd1,0x1a]
 602
 603
 604 @------------------------------------------------------------------------------
 605 @ SVC
 606 @------------------------------------------------------------------------------
 607         svc #0
 608         svc #255
 609
 610 @ CHECK: svc    #0                      @ encoding: [0x00,0xdf]
 611 @ CHECK: svc    #255                    @ encoding: [0xff,0xdf]
 612
 613
 614 @------------------------------------------------------------------------------
 615 @ SXTB/SXTH
 616 @------------------------------------------------------------------------------
 617         sxtb r3, r5
 618         sxth r3, r5
 619
 620 @ CHECK: sxtb   r3, r5                  @ encoding: [0x6b,0xb2]
 621 @ CHECK: sxth   r3, r5                  @ encoding: [0x2b,0xb2]
 622
 623
 624 @------------------------------------------------------------------------------
 625 @ TST
 626 @------------------------------------------------------------------------------
 627         tst r6, r1
 628
 629 @ CHECK: tst    r6, r1                  @ encoding: [0x0e,0x42]
 630
 631
 632 @------------------------------------------------------------------------------
 633 @ UXTB/UXTH
 634 @------------------------------------------------------------------------------
 635         uxtb  r7, r2
 636         uxth  r1, r4
 637
 638 @ CHECK: uxtb   r7, r2                  @ encoding: [0xd7,0xb2]
 639 @ CHECK: uxth   r1, r4                  @ encoding: [0xa1,0xb2]
 640
 641