gdb/testsuite/gdb.arch/s390-vregs.S

   1 /* Copyright 2015-2016 Free Software Foundation, Inc.
   2
   3    This file is part of GDB.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18         .text
  19
  20         /* 'check_vx': Yield SIGILL unless vector support is
  21         available.  Have a "pit stop" breakpoint here.  */
  22
  23         .align  8
  24         .type   check_vx, @function
  25 check_vx:
  26         .cfi_startproc
  27         /* vlr  %v0,%v0 */
  28         .byte 0xe7,0x00,0x00,0x00,0x00,0x56
  29         br      %r14
  30         .cfi_endproc
  31         .size   check_vx, .-check_vx
  32
  33
  34         /* 'store_vrs': Store vector registers in save_area.  */
  35
  36         .align 8
  37         .type   store_vrs, @function
  38 store_vrs:
  39         .cfi_startproc
  40         larl    %r1,save_area
  41         /* vstm %v0,%v15,0(%r1) */
  42         .byte 0xe7,0x0f,0x10,0x00,0x00,0x3e
  43         /* vstm %v16,%v31,256(%r1) */
  44         .byte 0xe7,0x0f,0x11,0x00,0x0c,0x3e
  45         br      %r14
  46         .cfi_endproc
  47         .size   store_vrs, .-store_vrs
  48
  49
  50         /* 'change_vrs': Manipulate vector registers according to a
  51         simple algorithm.  */
  52
  53         .align 8
  54         .type   change_vrs, @function
  55 change_vrs:
  56         .cfi_startproc
  57         lghi    %r1,16
  58         lghi    %r3,0xff
  59 1:      .insn   ril,0xc60000000000,%r3,2f /* exrl */
  60         .insn   ril,0xc60000000000,%r3,1f /* exrl */
  61         aghi    %r3,-0x11
  62         brctg   %r1,1b
  63         br      %r14
  64         .cfi_endproc
  65         /* vmlf %v0,%v0,%v0 */
  66 1:      .byte   0xe7,0x00,0x00,0x00,0x20,0xa2
  67         /* vmlf %v16,%v16,%v0 */
  68 2:      .byte   0xe7,0x00,0x00,0x00,0x2c,0xa2
  69
  70
  71         /* 'main': Perform actions according to test case logic.
  72         Invoke check_vx whenever a pit stop is required.  */
  73
  74         .section        .text.startup,"ax",@progbits
  75         .align  8
  76 .globl main
  77         .type   main, @function
  78 main:
  79         .cfi_startproc
  80         stmg    %r14,%r15,112(%r15)
  81         aghi    %r15,-160
  82         bras    %r14,check_vx
  83         bras    %r14,store_vrs
  84         bras    %r14,check_vx
  85         bras    %r14,change_vrs
  86         bras    %r14,check_vx
  87         lmg     %r14,%r15,272(%r15)
  88         lghi    %r2,0
  89         br      %r14
  90         .cfi_endproc
  91         .size   main, .-main
  92
  93         .local  save_area
  94         .comm   save_area,512,16
  95
  96         .section        .note.GNU-stack,"",@progbits