arch/parisc/kernel/perf_asm.S

   1
   2 /*    low-level asm for "intrigue" (PA8500-8700 CPU perf counters)
   3  *
   4  *    Copyright (C) 2001 Randolph Chung <tausq at parisc-linux.org>
   5  *    Copyright (C) 2001 Hewlett-Packard (Grant Grundler)
   6  *
   7  *    This program is free software; you can redistribute it and/or modify
   8  *    it under the terms of the GNU General Public License as published by
   9  *    the Free Software Foundation; either version 2 of the License, or
  10  *    (at your option) any later version.
  11  *
  12  *    This program is distributed in the hope that it will be useful,
  13  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *    GNU General Public License for more details.
  16  *
  17  *    You should have received a copy of the GNU General Public License
  18  *    along with this program; if not, write to the Free Software
  19  *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include <asm/assembly.h>
  23 #include <linux/linkage.h>
  24
  25 #ifdef CONFIG_64BIT
  26         .level          2.0w
  27 #endif /* CONFIG_64BIT */
  28
  29 #define MTDIAG_1(gr)    .word 0x14201840 + gr*0x10000
  30 #define MTDIAG_2(gr)    .word 0x14401840 + gr*0x10000
  31 #define MFDIAG_1(gr)    .word 0x142008A0 + gr
  32 #define MFDIAG_2(gr)    .word 0x144008A0 + gr
  33 #define STDIAG(dr)      .word 0x14000AA0 + dr*0x200000
  34 #define SFDIAG(dr)      .word 0x14000BA0 + dr*0x200000
  35 #define DR2_SLOW_RET    53
  36
  37
  38 ;
  39 ; Enable the performance counters
  40 ;
  41 ; The coprocessor only needs to be enabled when
  42 ; starting/stopping the coprocessor with the pmenb/pmdis.
  43 ;
  44         .text
  45
  46 ENTRY(perf_intrigue_enable_perf_counters)
  47         .proc
  48         .callinfo  frame=0,NO_CALLS
  49         .entry
  50
  51         ldi     0x20,%r25                ; load up perfmon bit
  52         mfctl   ccr,%r26                 ; get coprocessor register
  53         or      %r25,%r26,%r26             ; set bit
  54         mtctl   %r26,ccr                 ; turn on performance coprocessor
  55         pmenb                           ; enable performance monitor
  56         ssm     0,0                     ; dummy op to ensure completion
  57         sync                            ; follow ERS
  58         andcm   %r26,%r25,%r26             ; clear bit now
  59         mtctl   %r26,ccr                 ; turn off performance coprocessor
  60         nop                             ; NOPs as specified in ERS
  61         nop
  62         nop
  63         nop
  64         nop
  65         nop
  66         nop
  67         bve    (%r2)
  68         nop
  69         .exit
  70         .procend
  71 ENDPROC(perf_intrigue_enable_perf_counters)
  72
  73 ENTRY(perf_intrigue_disable_perf_counters)
  74         .proc
  75         .callinfo  frame=0,NO_CALLS
  76         .entry
  77         ldi     0x20,%r25                ; load up perfmon bit
  78         mfctl   ccr,%r26                 ; get coprocessor register
  79         or      %r25,%r26,%r26             ; set bit
  80         mtctl   %r26,ccr                 ; turn on performance coprocessor
  81         pmdis                           ; disable performance monitor
  82         ssm     0,0                     ; dummy op to ensure completion
  83         andcm   %r26,%r25,%r26             ; clear bit now
  84         bve    (%r2)
  85         mtctl   %r26,ccr                 ; turn off performance coprocessor
  86         .exit
  87         .procend
  88 ENDPROC(perf_intrigue_disable_perf_counters)
  89
  90 ;***********************************************************************
  91 ;*
  92 ;* Name: perf_rdr_shift_in_W
  93 ;*
  94 ;* Description:
  95 ;*      This routine shifts data in from the RDR in arg0 and returns
  96 ;*      the result in ret0.  If the RDR is <= 64 bits in length, it
  97 ;*      is shifted shifted backup immediately.  This is to compensate
  98 ;*      for RDR10 which has bits that preclude PDC stack operations
  99 ;*      when they are in the wrong state.
 100 ;*
 101 ;* Arguments:
 102 ;*      arg0 : rdr to be read
 103 ;*      arg1 : bit length of rdr
 104 ;*
 105 ;* Returns:
 106 ;*      ret0 = next 64 bits of rdr data from staging register
 107 ;*
 108 ;* Register usage:
 109 ;*      arg0 : rdr to be read
 110 ;*      arg1 : bit length of rdr
 111 ;*      %r24  - original DR2 value
 112 ;*      %r1   - scratch
 113 ;*  %r29  - scratch
 114 ;*
 115 ;* Returns:
 116 ;*      ret0 = RDR data (right justified)
 117 ;*
 118 ;***********************************************************************
 119
 120 ENTRY(perf_rdr_shift_in_W)
 121         .proc
 122         .callinfo frame=0,NO_CALLS
 123         .entry
 124 ;
 125 ; read(shift in) the RDR.
 126 ;
 127
 128 ; NOTE: The PCX-W ERS states that DR2_SLOW_RET must be set before any
 129 ; shifting is done, from or to, remote diagnose registers.
 130 ;
 131
 132         depdi,z         1,DR2_SLOW_RET,1,%r29
 133         MFDIAG_2        (24)
 134         or                  %r24,%r29,%r29
 135         MTDIAG_2        (29)                    ; set DR2_SLOW_RET
 136
 137         nop
 138         nop
 139         nop
 140         nop
 141
 142 ;
 143 ; Cacheline start (32-byte cacheline)
 144 ;
 145         nop
 146         nop
 147         nop
 148         extrd,u         arg1,63,6,%r1   ; setup shift amount by bits to move
 149
 150         mtsar           %r1
 151         shladd          arg0,2,%r0,%r1  ; %r1 = 4 * RDR number
 152         blr             %r1,%r0         ; branch to 8-instruction sequence
 153         nop
 154
 155 ;
 156 ; Cacheline start (32-byte cacheline)
 157 ;
 158
 159         ;
 160         ; RDR 0 sequence
 161         ;
 162         SFDIAG          (0)
 163         ssm                 0,0
 164         MFDIAG_1        (28)
 165         shrpd           ret0,%r0,%sar,%r1
 166         MTDIAG_1        (1)                     ; mtdiag %dr1, %r1
 167         STDIAG          (0)
 168         ssm                 0,0
 169         b,n         perf_rdr_shift_in_W_leave
 170
 171         ;
 172         ; RDR 1 sequence
 173         ;
 174         sync
 175         ssm                 0,0
 176         SFDIAG          (1)
 177         ssm                 0,0
 178         MFDIAG_1        (28)
 179         ssm                 0,0
 180         b,n         perf_rdr_shift_in_W_leave
 181         nop
 182
 183         ;
 184         ; RDR 2 read sequence
 185         ;
 186         SFDIAG          (2)
 187         ssm                 0,0
 188         MFDIAG_1        (28)
 189         shrpd           ret0,%r0,%sar,%r1
 190         MTDIAG_1        (1)
 191         STDIAG          (2)
 192         ssm                 0,0
 193         b,n         perf_rdr_shift_in_W_leave
 194
 195         ;
 196         ; RDR 3 read sequence
 197         ;
 198         b,n         perf_rdr_shift_in_W_leave
 199         nop
 200         nop
 201         nop
 202         nop
 203         nop
 204         nop
 205         nop
 206
 207         ;
 208         ; RDR 4 read sequence
 209         ;
 210         sync
 211         ssm             0,0
 212         SFDIAG          (4)
 213         ssm             0,0
 214         MFDIAG_1        (28)
 215         b,n         perf_rdr_shift_in_W_leave
 216         ssm             0,0
 217         nop
 218
 219         ;
 220         ; RDR 5 read sequence
 221         ;
 222         sync
 223         ssm             0,0
 224         SFDIAG          (5)
 225         ssm             0,0
 226         MFDIAG_1        (28)
 227         b,n         perf_rdr_shift_in_W_leave
 228         ssm             0,0
 229         nop
 230
 231         ;
 232         ; RDR 6 read sequence
 233         ;
 234         sync
 235         ssm             0,0
 236         SFDIAG          (6)
 237         ssm             0,0
 238         MFDIAG_1        (28)
 239         b,n         perf_rdr_shift_in_W_leave
 240         ssm             0,0
 241         nop
 242
 243         ;
 244         ; RDR 7 read sequence
 245         ;
 246         b,n         perf_rdr_shift_in_W_leave
 247         nop
 248         nop
 249         nop
 250         nop
 251         nop
 252         nop
 253         nop
 254
 255         ;
 256         ; RDR 8 read sequence
 257         ;
 258         b,n         perf_rdr_shift_in_W_leave
 259         nop
 260         nop
 261         nop
 262         nop
 263         nop
 264         nop
 265         nop
 266
 267         ;
 268         ; RDR 9 read sequence
 269         ;
 270         b,n         perf_rdr_shift_in_W_leave
 271         nop
 272         nop
 273         nop
 274         nop
 275         nop
 276         nop
 277         nop
 278
 279         ;
 280         ; RDR 10 read sequence
 281         ;
 282         SFDIAG          (10)
 283         ssm             0,0
 284         MFDIAG_1        (28)
 285         shrpd           ret0,%r0,%sar,%r1
 286         MTDIAG_1        (1)
 287         STDIAG          (10)
 288         ssm             0,0
 289         b,n         perf_rdr_shift_in_W_leave
 290
 291         ;
 292         ; RDR 11 read sequence
 293         ;
 294         SFDIAG          (11)
 295         ssm             0,0
 296         MFDIAG_1        (28)
 297         shrpd           ret0,%r0,%sar,%r1
 298         MTDIAG_1        (1)
 299         STDIAG          (11)
 300         ssm             0,0
 301         b,n         perf_rdr_shift_in_W_leave
 302
 303         ;
 304         ; RDR 12 read sequence
 305         ;
 306         b,n         perf_rdr_shift_in_W_leave
 307         nop
 308         nop
 309         nop
 310         nop
 311         nop
 312         nop
 313         nop
 314
 315         ;
 316         ; RDR 13 read sequence
 317         ;
 318         sync
 319         ssm             0,0
 320         SFDIAG          (13)
 321         ssm             0,0
 322         MFDIAG_1        (28)
 323         b,n         perf_rdr_shift_in_W_leave
 324         ssm             0,0
 325         nop
 326
 327         ;
 328         ; RDR 14 read sequence
 329         ;
 330         SFDIAG          (14)
 331         ssm             0,0
 332         MFDIAG_1        (28)
 333         shrpd           ret0,%r0,%sar,%r1
 334         MTDIAG_1        (1)
 335         STDIAG          (14)
 336         ssm             0,0
 337         b,n         perf_rdr_shift_in_W_leave
 338
 339         ;
 340         ; RDR 15 read sequence
 341         ;
 342         sync
 343         ssm             0,0
 344         SFDIAG          (15)
 345         ssm             0,0
 346         MFDIAG_1        (28)
 347         ssm             0,0
 348         b,n         perf_rdr_shift_in_W_leave
 349         nop
 350
 351         ;
 352         ; RDR 16 read sequence
 353         ;
 354         sync
 355         ssm             0,0
 356         SFDIAG          (16)
 357         ssm             0,0
 358         MFDIAG_1        (28)
 359         b,n         perf_rdr_shift_in_W_leave
 360         ssm             0,0
 361         nop
 362
 363         ;
 364         ; RDR 17 read sequence
 365         ;
 366         SFDIAG          (17)
 367         ssm             0,0
 368         MFDIAG_1        (28)
 369         shrpd           ret0,%r0,%sar,%r1
 370         MTDIAG_1        (1)
 371         STDIAG          (17)
 372         ssm             0,0
 373         b,n         perf_rdr_shift_in_W_leave
 374
 375         ;
 376         ; RDR 18 read sequence
 377         ;
 378         SFDIAG          (18)
 379         ssm             0,0
 380         MFDIAG_1        (28)
 381         shrpd           ret0,%r0,%sar,%r1
 382         MTDIAG_1        (1)
 383         STDIAG          (18)
 384         ssm             0,0
 385         b,n         perf_rdr_shift_in_W_leave
 386
 387         ;
 388         ; RDR 19 read sequence
 389         ;
 390         b,n         perf_rdr_shift_in_W_leave
 391         nop
 392         nop
 393         nop
 394         nop
 395         nop
 396         nop
 397         nop
 398
 399         ;
 400         ; RDR 20 read sequence
 401         ;
 402         sync
 403         ssm             0,0
 404         SFDIAG          (20)
 405         ssm             0,0
 406         MFDIAG_1        (28)
 407         b,n         perf_rdr_shift_in_W_leave
 408         ssm             0,0
 409         nop
 410
 411         ;
 412         ; RDR 21 read sequence
 413         ;
 414         sync
 415         ssm             0,0
 416         SFDIAG          (21)
 417         ssm             0,0
 418         MFDIAG_1        (28)
 419         b,n         perf_rdr_shift_in_W_leave
 420         ssm             0,0
 421         nop
 422
 423         ;
 424         ; RDR 22 read sequence
 425         ;
 426         sync
 427         ssm             0,0
 428         SFDIAG          (22)
 429         ssm             0,0
 430         MFDIAG_1        (28)
 431         b,n         perf_rdr_shift_in_W_leave
 432         ssm             0,0
 433         nop
 434
 435         ;
 436         ; RDR 23 read sequence
 437         ;
 438         sync
 439         ssm             0,0
 440         SFDIAG          (23)
 441         ssm             0,0
 442         MFDIAG_1        (28)
 443         b,n         perf_rdr_shift_in_W_leave
 444         ssm             0,0
 445         nop
 446
 447         ;
 448         ; RDR 24 read sequence
 449         ;
 450         sync
 451         ssm             0,0
 452         SFDIAG          (24)
 453         ssm             0,0
 454         MFDIAG_1        (28)
 455         b,n         perf_rdr_shift_in_W_leave
 456         ssm             0,0
 457         nop
 458
 459         ;
 460         ; RDR 25 read sequence
 461         ;
 462         sync
 463         ssm             0,0
 464         SFDIAG          (25)
 465         ssm             0,0
 466         MFDIAG_1        (28)
 467         b,n         perf_rdr_shift_in_W_leave
 468         ssm             0,0
 469         nop
 470
 471         ;
 472         ; RDR 26 read sequence
 473         ;
 474         SFDIAG          (26)
 475         ssm             0,0
 476         MFDIAG_1        (28)
 477         shrpd           ret0,%r0,%sar,%r1
 478         MTDIAG_1        (1)
 479         STDIAG          (26)
 480         ssm             0,0
 481         b,n         perf_rdr_shift_in_W_leave
 482
 483         ;
 484         ; RDR 27 read sequence
 485         ;
 486         SFDIAG          (27)
 487         ssm             0,0
 488         MFDIAG_1        (28)
 489         shrpd           ret0,%r0,%sar,%r1
 490         MTDIAG_1        (1)
 491         STDIAG          (27)
 492         ssm             0,0
 493         b,n         perf_rdr_shift_in_W_leave
 494
 495         ;
 496         ; RDR 28 read sequence
 497         ;
 498         sync
 499         ssm             0,0
 500         SFDIAG          (28)
 501         ssm             0,0
 502         MFDIAG_1        (28)
 503         b,n         perf_rdr_shift_in_W_leave
 504         ssm             0,0
 505         nop
 506
 507         ;
 508         ; RDR 29 read sequence
 509         ;
 510         sync
 511         ssm             0,0
 512         SFDIAG          (29)
 513         ssm             0,0
 514         MFDIAG_1        (28)
 515         b,n         perf_rdr_shift_in_W_leave
 516         ssm             0,0
 517         nop
 518
 519         ;
 520         ; RDR 30 read sequence
 521         ;
 522         SFDIAG          (30)
 523         ssm             0,0
 524         MFDIAG_1        (28)
 525         shrpd           ret0,%r0,%sar,%r1
 526         MTDIAG_1        (1)
 527         STDIAG          (30)
 528         ssm             0,0
 529         b,n         perf_rdr_shift_in_W_leave
 530
 531         ;
 532         ; RDR 31 read sequence
 533         ;
 534         sync
 535         ssm             0,0
 536         SFDIAG          (31)
 537         ssm             0,0
 538         MFDIAG_1        (28)
 539         nop
 540         ssm             0,0
 541         nop
 542
 543         ;
 544         ; Fallthrough
 545         ;
 546
 547 perf_rdr_shift_in_W_leave:
 548         bve                 (%r2)
 549         .exit
 550         MTDIAG_2        (24)                    ; restore DR2
 551         .procend
 552 ENDPROC(perf_rdr_shift_in_W)
 553
 554
 555 ;***********************************************************************
 556 ;*
 557 ;* Name: perf_rdr_shift_out_W
 558 ;*
 559 ;* Description:
 560 ;*      This routine moves data to the RDR's.  The double-word that
 561 ;*      arg1 points to is loaded and moved into the staging register.
 562 ;*      Then the STDIAG instruction for the RDR # in arg0 is called
 563 ;*      to move the data to the RDR.
 564 ;*
 565 ;* Arguments:
 566 ;*      arg0 = rdr number
 567 ;*      arg1 = 64-bit value to write
 568 ;*      %r24 - DR2 | DR2_SLOW_RET
 569 ;*      %r23 - original DR2 value
 570 ;*
 571 ;* Returns:
 572 ;*      None
 573 ;*
 574 ;* Register usage:
 575 ;*
 576 ;***********************************************************************
 577
 578 ENTRY(perf_rdr_shift_out_W)
 579         .proc
 580         .callinfo frame=0,NO_CALLS
 581         .entry
 582 ;
 583 ; NOTE: The PCX-W ERS states that DR2_SLOW_RET must be set before any
 584 ; shifting is done, from or to, the remote diagnose registers.
 585 ;
 586
 587         depdi,z         1,DR2_SLOW_RET,1,%r24
 588         MFDIAG_2        (23)
 589         or              %r24,%r23,%r24
 590         MTDIAG_2        (24)            ; set DR2_SLOW_RET
 591         MTDIAG_1        (25)            ; data to the staging register
 592         shladd          arg0,2,%r0,%r1  ; %r1 = 4 * RDR number
 593         blr                 %r1,%r0     ; branch to 8-instruction sequence
 594         nop
 595
 596         ;
 597         ; RDR 0 write sequence
 598         ;
 599         sync                            ; RDR 0 write sequence
 600         ssm             0,0
 601         STDIAG          (0)
 602         ssm             0,0
 603         b,n         perf_rdr_shift_out_W_leave
 604         nop
 605         ssm             0,0
 606         nop
 607
 608         ;
 609         ; RDR 1 write sequence
 610         ;
 611         sync
 612         ssm             0,0
 613         STDIAG          (1)
 614         ssm             0,0
 615         b,n         perf_rdr_shift_out_W_leave
 616         nop
 617         ssm             0,0
 618         nop
 619
 620         ;
 621         ; RDR 2 write sequence
 622         ;
 623         sync
 624         ssm             0,0
 625         STDIAG          (2)
 626         ssm             0,0
 627         b,n         perf_rdr_shift_out_W_leave
 628         nop
 629         ssm             0,0
 630         nop
 631
 632         ;
 633         ; RDR 3 write sequence
 634         ;
 635         sync
 636         ssm             0,0
 637         STDIAG          (3)
 638         ssm             0,0
 639         b,n         perf_rdr_shift_out_W_leave
 640         nop
 641         ssm             0,0
 642         nop
 643
 644         ;
 645         ; RDR 4 write sequence
 646         ;
 647         sync
 648         ssm             0,0
 649         STDIAG          (4)
 650         ssm             0,0
 651         b,n         perf_rdr_shift_out_W_leave
 652         nop
 653         ssm             0,0
 654         nop
 655
 656         ;
 657         ; RDR 5 write sequence
 658         ;
 659         sync
 660         ssm             0,0
 661         STDIAG          (5)
 662         ssm             0,0
 663         b,n         perf_rdr_shift_out_W_leave
 664         nop
 665         ssm             0,0
 666         nop
 667
 668         ;
 669         ; RDR 6 write sequence
 670         ;
 671         sync
 672         ssm             0,0
 673         STDIAG          (6)
 674         ssm             0,0
 675         b,n         perf_rdr_shift_out_W_leave
 676         nop
 677         ssm             0,0
 678         nop
 679
 680         ;
 681         ; RDR 7 write sequence
 682         ;
 683         sync
 684         ssm             0,0
 685         STDIAG          (7)
 686         ssm             0,0
 687         b,n         perf_rdr_shift_out_W_leave
 688         nop
 689         ssm             0,0
 690         nop
 691
 692         ;
 693         ; RDR 8 write sequence
 694         ;
 695         sync
 696         ssm             0,0
 697         STDIAG          (8)
 698         ssm             0,0
 699         b,n         perf_rdr_shift_out_W_leave
 700         nop
 701         ssm             0,0
 702         nop
 703
 704         ;
 705         ; RDR 9 write sequence
 706         ;
 707         sync
 708         ssm             0,0
 709         STDIAG          (9)
 710         ssm             0,0
 711         b,n         perf_rdr_shift_out_W_leave
 712         nop
 713         ssm             0,0
 714         nop
 715
 716         ;
 717         ; RDR 10 write sequence
 718         ;
 719         sync
 720         ssm             0,0
 721         STDIAG          (10)
 722         STDIAG          (26)
 723         ssm             0,0
 724         b,n         perf_rdr_shift_out_W_leave
 725         ssm             0,0
 726         nop
 727
 728         ;
 729         ; RDR 11 write sequence
 730         ;
 731         sync
 732         ssm             0,0
 733         STDIAG          (11)
 734         STDIAG          (27)
 735         ssm             0,0
 736         b,n         perf_rdr_shift_out_W_leave
 737         ssm             0,0
 738         nop
 739
 740         ;
 741         ; RDR 12 write sequence
 742         ;
 743         sync
 744         ssm             0,0
 745         STDIAG          (12)
 746         ssm             0,0
 747         b,n         perf_rdr_shift_out_W_leave
 748         nop
 749         ssm             0,0
 750         nop
 751
 752         ;
 753         ; RDR 13 write sequence
 754         ;
 755         sync
 756         ssm             0,0
 757         STDIAG          (13)
 758         ssm             0,0
 759         b,n         perf_rdr_shift_out_W_leave
 760         nop
 761         ssm             0,0
 762         nop
 763
 764         ;
 765         ; RDR 14 write sequence
 766         ;
 767         sync
 768         ssm             0,0
 769         STDIAG          (14)
 770         ssm             0,0
 771         b,n         perf_rdr_shift_out_W_leave
 772         nop
 773         ssm             0,0
 774         nop
 775
 776         ;
 777         ; RDR 15 write sequence
 778         ;
 779         sync
 780         ssm             0,0
 781         STDIAG          (15)
 782         ssm             0,0
 783         b,n         perf_rdr_shift_out_W_leave
 784         nop
 785         ssm             0,0
 786         nop
 787
 788         ;
 789         ; RDR 16 write sequence
 790         ;
 791         sync
 792         ssm             0,0
 793         STDIAG          (16)
 794         ssm             0,0
 795         b,n         perf_rdr_shift_out_W_leave
 796         nop
 797         ssm             0,0
 798         nop
 799
 800         ;
 801         ; RDR 17 write sequence
 802         ;
 803         sync
 804         ssm             0,0
 805         STDIAG          (17)
 806         ssm             0,0
 807         b,n         perf_rdr_shift_out_W_leave
 808         nop
 809         ssm             0,0
 810         nop
 811
 812         ;
 813         ; RDR 18 write sequence
 814         ;
 815         sync
 816         ssm             0,0
 817         STDIAG          (18)
 818         ssm             0,0
 819         b,n         perf_rdr_shift_out_W_leave
 820         nop
 821         ssm             0,0
 822         nop
 823
 824         ;
 825         ; RDR 19 write sequence
 826         ;
 827         sync
 828         ssm             0,0
 829         STDIAG          (19)
 830         ssm             0,0
 831         b,n         perf_rdr_shift_out_W_leave
 832         nop
 833         ssm             0,0
 834         nop
 835
 836         ;
 837         ; RDR 20 write sequence
 838         ;
 839         sync
 840         ssm             0,0
 841         STDIAG          (20)
 842         ssm             0,0
 843         b,n         perf_rdr_shift_out_W_leave
 844         nop
 845         ssm             0,0
 846         nop
 847
 848         ;
 849         ; RDR 21 write sequence
 850         ;
 851         sync
 852         ssm             0,0
 853         STDIAG          (21)
 854         ssm             0,0
 855         b,n         perf_rdr_shift_out_W_leave
 856         nop
 857         ssm             0,0
 858         nop
 859
 860         ;
 861         ; RDR 22 write sequence
 862         ;
 863         sync
 864         ssm             0,0
 865         STDIAG          (22)
 866         ssm             0,0
 867         b,n         perf_rdr_shift_out_W_leave
 868         nop
 869         ssm             0,0
 870         nop
 871
 872         ;
 873         ; RDR 23 write sequence
 874         ;
 875         sync
 876         ssm             0,0
 877         STDIAG          (23)
 878         ssm             0,0
 879         b,n         perf_rdr_shift_out_W_leave
 880         nop
 881         ssm             0,0
 882         nop
 883
 884         ;
 885         ; RDR 24 write sequence
 886         ;
 887         sync
 888         ssm             0,0
 889         STDIAG          (24)
 890         ssm             0,0
 891         b,n         perf_rdr_shift_out_W_leave
 892         nop
 893         ssm             0,0
 894         nop
 895
 896         ;
 897         ; RDR 25 write sequence
 898         ;
 899         sync
 900         ssm             0,0
 901         STDIAG          (25)
 902         ssm             0,0
 903         b,n         perf_rdr_shift_out_W_leave
 904         nop
 905         ssm             0,0
 906         nop
 907
 908         ;
 909         ; RDR 26 write sequence
 910         ;
 911         sync
 912         ssm             0,0
 913         STDIAG          (10)
 914         STDIAG          (26)
 915         ssm             0,0
 916         b,n         perf_rdr_shift_out_W_leave
 917         ssm             0,0
 918         nop
 919
 920         ;
 921         ; RDR 27 write sequence
 922         ;
 923         sync
 924         ssm             0,0
 925         STDIAG          (11)
 926         STDIAG          (27)
 927         ssm             0,0
 928         b,n         perf_rdr_shift_out_W_leave
 929         ssm             0,0
 930         nop
 931
 932         ;
 933         ; RDR 28 write sequence
 934         ;
 935         sync
 936         ssm             0,0
 937         STDIAG          (28)
 938         ssm             0,0
 939         b,n         perf_rdr_shift_out_W_leave
 940         nop
 941         ssm             0,0
 942         nop
 943
 944         ;
 945         ; RDR 29 write sequence
 946         ;
 947         sync
 948         ssm             0,0
 949         STDIAG          (29)
 950         ssm             0,0
 951         b,n         perf_rdr_shift_out_W_leave
 952         nop
 953         ssm             0,0
 954         nop
 955
 956         ;
 957         ; RDR 30 write sequence
 958         ;
 959         sync
 960         ssm             0,0
 961         STDIAG          (30)
 962         ssm             0,0
 963         b,n         perf_rdr_shift_out_W_leave
 964         nop
 965         ssm             0,0
 966         nop
 967
 968         ;
 969         ; RDR 31 write sequence
 970         ;
 971         sync
 972         ssm             0,0
 973         STDIAG          (31)
 974         ssm             0,0
 975         b,n         perf_rdr_shift_out_W_leave
 976         nop
 977         ssm             0,0
 978         nop
 979
 980 perf_rdr_shift_out_W_leave:
 981         bve             (%r2)
 982         .exit
 983         MTDIAG_2        (23)                    ; restore DR2
 984         .procend
 985 ENDPROC(perf_rdr_shift_out_W)
 986
 987
 988 ;***********************************************************************
 989 ;*
 990 ;* Name: rdr_shift_in_U
 991 ;*
 992 ;* Description:
 993 ;*      This routine shifts data in from the RDR in arg0 and returns
 994 ;*      the result in ret0.  If the RDR is <= 64 bits in length, it
 995 ;*      is shifted shifted backup immediately.  This is to compensate
 996 ;*      for RDR10 which has bits that preclude PDC stack operations
 997 ;*      when they are in the wrong state.
 998 ;*
 999 ;* Arguments:
1000 ;*      arg0 : rdr to be read
1001 ;*      arg1 : bit length of rdr
1002 ;*
1003 ;* Returns:
1004 ;*      ret0 = next 64 bits of rdr data from staging register
1005 ;*
1006 ;* Register usage:
1007 ;*      arg0 : rdr to be read
1008 ;*      arg1 : bit length of rdr
1009 ;*      %r24 - original DR2 value
1010 ;*      %r23 - DR2 | DR2_SLOW_RET
1011 ;*      %r1  - scratch
1012 ;*
1013 ;***********************************************************************
1014
1015 ENTRY(perf_rdr_shift_in_U)
1016         .proc
1017         .callinfo frame=0,NO_CALLS
1018         .entry
1019
1020 ; read(shift in) the RDR.
1021 ;
1022 ; NOTE: The PCX-U ERS states that DR2_SLOW_RET must be set before any
1023 ; shifting is done, from or to, remote diagnose registers.
1024
1025         depdi,z         1,DR2_SLOW_RET,1,%r29
1026         MFDIAG_2        (24)
1027         or                      %r24,%r29,%r29
1028         MTDIAG_2        (29)                    ; set DR2_SLOW_RET
1029
1030         nop
1031         nop
1032         nop
1033         nop
1034
1035 ;
1036 ; Start of next 32-byte cacheline
1037 ;
1038         nop
1039         nop
1040         nop
1041         extrd,u         arg1,63,6,%r1
1042
1043         mtsar           %r1
1044         shladd          arg0,2,%r0,%r1  ; %r1 = 4 * RDR number
1045         blr             %r1,%r0         ; branch to 8-instruction sequence
1046         nop
1047
1048 ;
1049 ; Start of next 32-byte cacheline
1050 ;
1051         SFDIAG          (0)             ; RDR 0 read sequence
1052         ssm             0,0
1053         MFDIAG_1        (28)
1054         shrpd           ret0,%r0,%sar,%r1
1055         MTDIAG_1        (1)
1056         STDIAG          (0)
1057         ssm             0,0
1058         b,n         perf_rdr_shift_in_U_leave
1059
1060         SFDIAG          (1)             ; RDR 1 read sequence
1061         ssm             0,0
1062         MFDIAG_1        (28)
1063         shrpd           ret0,%r0,%sar,%r1
1064         MTDIAG_1        (1)
1065         STDIAG          (1)
1066         ssm             0,0
1067         b,n         perf_rdr_shift_in_U_leave
1068
1069         sync                            ; RDR 2 read sequence
1070         ssm             0,0
1071         SFDIAG          (4)
1072         ssm             0,0
1073         MFDIAG_1        (28)
1074         b,n         perf_rdr_shift_in_U_leave
1075         ssm             0,0
1076         nop
1077
1078         sync                            ; RDR 3 read sequence
1079         ssm             0,0
1080         SFDIAG          (3)
1081         ssm             0,0
1082         MFDIAG_1        (28)
1083         b,n         perf_rdr_shift_in_U_leave
1084         ssm             0,0
1085         nop
1086
1087         sync                            ; RDR 4 read sequence
1088         ssm             0,0
1089         SFDIAG          (4)
1090         ssm             0,0
1091         MFDIAG_1        (28)
1092         b,n         perf_rdr_shift_in_U_leave
1093         ssm             0,0
1094         nop
1095
1096         sync                            ; RDR 5 read sequence
1097         ssm             0,0
1098         SFDIAG          (5)
1099         ssm             0,0
1100         MFDIAG_1        (28)
1101         b,n         perf_rdr_shift_in_U_leave
1102         ssm             0,0
1103         nop
1104
1105         sync                            ; RDR 6 read sequence
1106         ssm             0,0
1107         SFDIAG          (6)
1108         ssm             0,0
1109         MFDIAG_1        (28)
1110         b,n         perf_rdr_shift_in_U_leave
1111         ssm             0,0
1112         nop
1113
1114         sync                            ; RDR 7 read sequence
1115         ssm             0,0
1116         SFDIAG          (7)
1117         ssm             0,0
1118         MFDIAG_1        (28)
1119         b,n         perf_rdr_shift_in_U_leave
1120         ssm             0,0
1121         nop
1122
1123         b,n         perf_rdr_shift_in_U_leave
1124         nop
1125         nop
1126         nop
1127         nop
1128         nop
1129         nop
1130         nop
1131
1132         SFDIAG          (9)             ; RDR 9 read sequence
1133         ssm             0,0
1134         MFDIAG_1        (28)
1135         shrpd           ret0,%r0,%sar,%r1
1136         MTDIAG_1        (1)
1137         STDIAG          (9)
1138         ssm             0,0
1139         b,n         perf_rdr_shift_in_U_leave
1140
1141         SFDIAG          (10)            ; RDR 10 read sequence
1142         ssm             0,0
1143         MFDIAG_1        (28)
1144         shrpd           ret0,%r0,%sar,%r1
1145         MTDIAG_1        (1)
1146         STDIAG          (10)
1147         ssm             0,0
1148         b,n         perf_rdr_shift_in_U_leave
1149
1150         SFDIAG          (11)            ; RDR 11 read sequence
1151         ssm             0,0
1152         MFDIAG_1        (28)
1153         shrpd           ret0,%r0,%sar,%r1
1154         MTDIAG_1        (1)
1155         STDIAG          (11)
1156         ssm             0,0
1157         b,n         perf_rdr_shift_in_U_leave
1158
1159         SFDIAG          (12)            ; RDR 12 read sequence
1160         ssm             0,0
1161         MFDIAG_1        (28)
1162         shrpd           ret0,%r0,%sar,%r1
1163         MTDIAG_1        (1)
1164         STDIAG          (12)
1165         ssm             0,0
1166         b,n         perf_rdr_shift_in_U_leave
1167
1168         SFDIAG          (13)            ; RDR 13 read sequence
1169         ssm             0,0
1170         MFDIAG_1        (28)
1171         shrpd           ret0,%r0,%sar,%r1
1172         MTDIAG_1        (1)
1173         STDIAG          (13)
1174         ssm             0,0
1175         b,n         perf_rdr_shift_in_U_leave
1176
1177         SFDIAG          (14)            ; RDR 14 read sequence
1178         ssm             0,0
1179         MFDIAG_1        (28)
1180         shrpd           ret0,%r0,%sar,%r1
1181         MTDIAG_1        (1)
1182         STDIAG          (14)
1183         ssm             0,0
1184         b,n         perf_rdr_shift_in_U_leave
1185
1186         SFDIAG          (15)            ; RDR 15 read sequence
1187         ssm             0,0
1188         MFDIAG_1        (28)
1189         shrpd           ret0,%r0,%sar,%r1
1190         MTDIAG_1        (1)
1191         STDIAG          (15)
1192         ssm             0,0
1193         b,n         perf_rdr_shift_in_U_leave
1194
1195         sync                            ; RDR 16 read sequence
1196         ssm             0,0
1197         SFDIAG          (16)
1198         ssm             0,0
1199         MFDIAG_1        (28)
1200         b,n         perf_rdr_shift_in_U_leave
1201         ssm             0,0
1202         nop
1203
1204         SFDIAG          (17)            ; RDR 17 read sequence
1205         ssm             0,0
1206         MFDIAG_1        (28)
1207         shrpd           ret0,%r0,%sar,%r1
1208         MTDIAG_1        (1)
1209         STDIAG          (17)
1210         ssm             0,0
1211         b,n         perf_rdr_shift_in_U_leave
1212
1213         SFDIAG          (18)            ; RDR 18 read sequence
1214         ssm             0,0
1215         MFDIAG_1        (28)
1216         shrpd           ret0,%r0,%sar,%r1
1217         MTDIAG_1        (1)
1218         STDIAG          (18)
1219         ssm             0,0
1220         b,n         perf_rdr_shift_in_U_leave
1221
1222         b,n         perf_rdr_shift_in_U_leave
1223         nop
1224         nop
1225         nop
1226         nop
1227         nop
1228         nop
1229         nop
1230
1231         sync                            ; RDR 20 read sequence
1232         ssm             0,0
1233         SFDIAG          (20)
1234         ssm             0,0
1235         MFDIAG_1        (28)
1236         b,n         perf_rdr_shift_in_U_leave
1237         ssm             0,0
1238         nop
1239
1240         sync                            ; RDR 21 read sequence
1241         ssm             0,0
1242         SFDIAG          (21)
1243         ssm             0,0
1244         MFDIAG_1        (28)
1245         b,n         perf_rdr_shift_in_U_leave
1246         ssm             0,0
1247         nop
1248
1249         sync                            ; RDR 22 read sequence
1250         ssm             0,0
1251         SFDIAG          (22)
1252         ssm             0,0
1253         MFDIAG_1        (28)
1254         b,n         perf_rdr_shift_in_U_leave
1255         ssm             0,0
1256         nop
1257
1258         sync                            ; RDR 23 read sequence
1259         ssm             0,0
1260         SFDIAG          (23)
1261         ssm             0,0
1262         MFDIAG_1        (28)
1263         b,n         perf_rdr_shift_in_U_leave
1264         ssm             0,0
1265         nop
1266
1267         sync                            ; RDR 24 read sequence
1268         ssm             0,0
1269         SFDIAG          (24)
1270         ssm             0,0
1271         MFDIAG_1        (28)
1272         b,n         perf_rdr_shift_in_U_leave
1273         ssm             0,0
1274         nop
1275
1276         sync                            ; RDR 25 read sequence
1277         ssm             0,0
1278         SFDIAG          (25)
1279         ssm             0,0
1280         MFDIAG_1        (28)
1281         b,n         perf_rdr_shift_in_U_leave
1282         ssm             0,0
1283         nop
1284
1285         SFDIAG          (26)            ; RDR 26 read sequence
1286         ssm             0,0
1287         MFDIAG_1        (28)
1288         shrpd           ret0,%r0,%sar,%r1
1289         MTDIAG_1        (1)
1290         STDIAG          (26)
1291         ssm             0,0
1292         b,n         perf_rdr_shift_in_U_leave
1293
1294         SFDIAG          (27)            ; RDR 27 read sequence
1295         ssm             0,0
1296         MFDIAG_1        (28)
1297         shrpd           ret0,%r0,%sar,%r1
1298         MTDIAG_1        (1)
1299         STDIAG          (27)
1300         ssm             0,0
1301         b,n         perf_rdr_shift_in_U_leave
1302
1303         sync                            ; RDR 28 read sequence
1304         ssm             0,0
1305         SFDIAG          (28)
1306         ssm             0,0
1307         MFDIAG_1        (28)
1308         b,n         perf_rdr_shift_in_U_leave
1309         ssm             0,0
1310         nop
1311
1312         b,n         perf_rdr_shift_in_U_leave
1313         nop
1314         nop
1315         nop
1316         nop
1317         nop
1318         nop
1319         nop
1320
1321         SFDIAG          (30)            ; RDR 30 read sequence
1322         ssm             0,0
1323         MFDIAG_1        (28)
1324         shrpd           ret0,%r0,%sar,%r1
1325         MTDIAG_1        (1)
1326         STDIAG          (30)
1327         ssm             0,0
1328         b,n         perf_rdr_shift_in_U_leave
1329
1330         SFDIAG          (31)            ; RDR 31 read sequence
1331         ssm             0,0
1332         MFDIAG_1        (28)
1333         shrpd           ret0,%r0,%sar,%r1
1334         MTDIAG_1        (1)
1335         STDIAG          (31)
1336         ssm             0,0
1337         b,n         perf_rdr_shift_in_U_leave
1338         nop
1339
1340 perf_rdr_shift_in_U_leave:
1341         bve                 (%r2)
1342         .exit
1343         MTDIAG_2        (24)                    ; restore DR2
1344         .procend
1345 ENDPROC(perf_rdr_shift_in_U)
1346
1347 ;***********************************************************************
1348 ;*
1349 ;* Name: rdr_shift_out_U
1350 ;*
1351 ;* Description:
1352 ;*      This routine moves data to the RDR's.  The double-word that
1353 ;*      arg1 points to is loaded and moved into the staging register.
1354 ;*      Then the STDIAG instruction for the RDR # in arg0 is called
1355 ;*      to move the data to the RDR.
1356 ;*
1357 ;* Arguments:
1358 ;*      arg0 = rdr target
1359 ;*      arg1 = buffer pointer
1360 ;*
1361 ;* Returns:
1362 ;*      None
1363 ;*
1364 ;* Register usage:
1365 ;*      arg0 = rdr target
1366 ;*      arg1 = buffer pointer
1367 ;*      %r24 - DR2 | DR2_SLOW_RET
1368 ;*      %r23 - original DR2 value
1369 ;*
1370 ;***********************************************************************
1371
1372 ENTRY(perf_rdr_shift_out_U)
1373         .proc
1374         .callinfo frame=0,NO_CALLS
1375         .entry
1376
1377 ;
1378 ; NOTE: The PCX-U ERS states that DR2_SLOW_RET must be set before any
1379 ; shifting is done, from or to, the remote diagnose registers.
1380 ;
1381
1382         depdi,z         1,DR2_SLOW_RET,1,%r24
1383         MFDIAG_2        (23)
1384         or              %r24,%r23,%r24
1385         MTDIAG_2        (24)            ; set DR2_SLOW_RET
1386
1387         MTDIAG_1        (25)            ; data to the staging register
1388         shladd          arg0,2,%r0,%r1  ; %r1 = 4 * RDR number
1389         blr             %r1,%r0         ; branch to 8-instruction sequence
1390         nop
1391
1392 ;
1393 ; 32-byte cachline aligned
1394 ;
1395
1396         sync                            ; RDR 0 write sequence
1397         ssm             0,0
1398         STDIAG          (0)
1399         ssm             0,0
1400         b,n         perf_rdr_shift_out_U_leave
1401         nop
1402         ssm             0,0
1403         nop
1404
1405         sync                            ; RDR 1 write sequence
1406         ssm             0,0
1407         STDIAG          (1)
1408         ssm             0,0
1409         b,n         perf_rdr_shift_out_U_leave
1410         nop
1411         ssm             0,0
1412         nop
1413
1414         sync                            ; RDR 2 write sequence
1415         ssm             0,0
1416         STDIAG          (2)
1417         ssm             0,0
1418         b,n         perf_rdr_shift_out_U_leave
1419         nop
1420         ssm             0,0
1421         nop
1422
1423         sync                            ; RDR 3 write sequence
1424         ssm             0,0
1425         STDIAG          (3)
1426         ssm             0,0
1427         b,n         perf_rdr_shift_out_U_leave
1428         nop
1429         ssm             0,0
1430         nop
1431
1432         sync                            ; RDR 4 write sequence
1433         ssm             0,0
1434         STDIAG          (4)
1435         ssm             0,0
1436         b,n         perf_rdr_shift_out_U_leave
1437         nop
1438         ssm             0,0
1439         nop
1440
1441         sync                            ; RDR 5 write sequence
1442         ssm             0,0
1443         STDIAG          (5)
1444         ssm             0,0
1445         b,n         perf_rdr_shift_out_U_leave
1446         nop
1447         ssm             0,0
1448         nop
1449
1450         sync                            ; RDR 6 write sequence
1451         ssm             0,0
1452         STDIAG          (6)
1453         ssm             0,0
1454         b,n         perf_rdr_shift_out_U_leave
1455         nop
1456         ssm             0,0
1457         nop
1458
1459         sync                            ; RDR 7 write sequence
1460         ssm             0,0
1461         STDIAG          (7)
1462         ssm             0,0
1463         b,n         perf_rdr_shift_out_U_leave
1464         nop
1465         ssm             0,0
1466         nop
1467
1468         sync                            ; RDR 8 write sequence
1469         ssm             0,0
1470         STDIAG          (8)
1471         ssm             0,0
1472         b,n         perf_rdr_shift_out_U_leave
1473         nop
1474         ssm             0,0
1475         nop
1476
1477         sync                            ; RDR 9 write sequence
1478         ssm             0,0
1479         STDIAG          (9)
1480         ssm             0,0
1481         b,n         perf_rdr_shift_out_U_leave
1482         nop
1483         ssm             0,0
1484         nop
1485
1486         sync                            ; RDR 10 write sequence
1487         ssm             0,0
1488         STDIAG          (10)
1489         ssm             0,0
1490         b,n         perf_rdr_shift_out_U_leave
1491         nop
1492         ssm             0,0
1493         nop
1494
1495         sync                            ; RDR 11 write sequence
1496         ssm             0,0
1497         STDIAG          (11)
1498         ssm             0,0
1499         b,n         perf_rdr_shift_out_U_leave
1500         nop
1501         ssm             0,0
1502         nop
1503
1504         sync                            ; RDR 12 write sequence
1505         ssm             0,0
1506         STDIAG          (12)
1507         ssm             0,0
1508         b,n         perf_rdr_shift_out_U_leave
1509         nop
1510         ssm             0,0
1511         nop
1512
1513         sync                            ; RDR 13 write sequence
1514         ssm             0,0
1515         STDIAG          (13)
1516         ssm             0,0
1517         b,n         perf_rdr_shift_out_U_leave
1518         nop
1519         ssm             0,0
1520         nop
1521
1522         sync                            ; RDR 14 write sequence
1523         ssm             0,0
1524         STDIAG          (14)
1525         ssm             0,0
1526         b,n         perf_rdr_shift_out_U_leave
1527         nop
1528         ssm             0,0
1529         nop
1530
1531         sync                            ; RDR 15 write sequence
1532         ssm             0,0
1533         STDIAG          (15)
1534         ssm             0,0
1535         b,n         perf_rdr_shift_out_U_leave
1536         nop
1537         ssm             0,0
1538         nop
1539
1540         sync                            ; RDR 16 write sequence
1541         ssm             0,0
1542         STDIAG          (16)
1543         ssm             0,0
1544         b,n         perf_rdr_shift_out_U_leave
1545         nop
1546         ssm             0,0
1547         nop
1548
1549         sync                            ; RDR 17 write sequence
1550         ssm             0,0
1551         STDIAG          (17)
1552         ssm             0,0
1553         b,n         perf_rdr_shift_out_U_leave
1554         nop
1555         ssm             0,0
1556         nop
1557
1558         sync                            ; RDR 18 write sequence
1559         ssm             0,0
1560         STDIAG          (18)
1561         ssm             0,0
1562         b,n         perf_rdr_shift_out_U_leave
1563         nop
1564         ssm             0,0
1565         nop
1566
1567         sync                            ; RDR 19 write sequence
1568         ssm             0,0
1569         STDIAG          (19)
1570         ssm             0,0
1571         b,n         perf_rdr_shift_out_U_leave
1572         nop
1573         ssm             0,0
1574         nop
1575
1576         sync                            ; RDR 20 write sequence
1577         ssm             0,0
1578         STDIAG          (20)
1579         ssm             0,0
1580         b,n         perf_rdr_shift_out_U_leave
1581         nop
1582         ssm             0,0
1583         nop
1584
1585         sync                            ; RDR 21 write sequence
1586         ssm             0,0
1587         STDIAG          (21)
1588         ssm             0,0
1589         b,n         perf_rdr_shift_out_U_leave
1590         nop
1591         ssm             0,0
1592         nop
1593
1594         sync                            ; RDR 22 write sequence
1595         ssm             0,0
1596         STDIAG          (22)
1597         ssm             0,0
1598         b,n         perf_rdr_shift_out_U_leave
1599         nop
1600         ssm             0,0
1601         nop
1602
1603         sync                            ; RDR 23 write sequence
1604         ssm             0,0
1605         STDIAG          (23)
1606         ssm             0,0
1607         b,n         perf_rdr_shift_out_U_leave
1608         nop
1609         ssm             0,0
1610         nop
1611
1612         sync                            ; RDR 24 write sequence
1613         ssm             0,0
1614         STDIAG          (24)
1615         ssm             0,0
1616         b,n         perf_rdr_shift_out_U_leave
1617         nop
1618         ssm             0,0
1619         nop
1620
1621         sync                            ; RDR 25 write sequence
1622         ssm             0,0
1623         STDIAG          (25)
1624         ssm             0,0
1625         b,n         perf_rdr_shift_out_U_leave
1626         nop
1627         ssm             0,0
1628         nop
1629
1630         sync                            ; RDR 26 write sequence
1631         ssm             0,0
1632         STDIAG          (26)
1633         ssm             0,0
1634         b,n         perf_rdr_shift_out_U_leave
1635         nop
1636         ssm             0,0
1637         nop
1638
1639         sync                            ; RDR 27 write sequence
1640         ssm             0,0
1641         STDIAG          (27)
1642         ssm             0,0
1643         b,n         perf_rdr_shift_out_U_leave
1644         nop
1645         ssm             0,0
1646         nop
1647
1648         sync                            ; RDR 28 write sequence
1649         ssm             0,0
1650         STDIAG          (28)
1651         ssm             0,0
1652         b,n         perf_rdr_shift_out_U_leave
1653         nop
1654         ssm             0,0
1655         nop
1656
1657         sync                            ; RDR 29 write sequence
1658         ssm             0,0
1659         STDIAG          (29)
1660         ssm             0,0
1661         b,n         perf_rdr_shift_out_U_leave
1662         nop
1663         ssm             0,0
1664         nop
1665
1666         sync                            ; RDR 30 write sequence
1667         ssm             0,0
1668         STDIAG          (30)
1669         ssm             0,0
1670         b,n         perf_rdr_shift_out_U_leave
1671         nop
1672         ssm             0,0
1673         nop
1674
1675         sync                            ; RDR 31 write sequence
1676         ssm             0,0
1677         STDIAG          (31)
1678         ssm             0,0
1679         b,n         perf_rdr_shift_out_U_leave
1680         nop
1681         ssm             0,0
1682         nop
1683
1684 perf_rdr_shift_out_U_leave:
1685         bve             (%r2)
1686         .exit
1687         MTDIAG_2        (23)                    ; restore DR2
1688         .procend
1689 ENDPROC(perf_rdr_shift_out_U)
1690