gnu/dist/gcc4/gcc/config/rs6000/darwin-vecsave.asm

   1 /*  This file contains the vector save and restore routines.
   2  *
   3  *   Copyright (C) 2004 Free Software Foundation, Inc.
   4  *
   5  * This file is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2, or (at your option) any
   8  * later version.
   9  *
  10  * In addition to the permissions in the GNU General Public License, the
  11  * Free Software Foundation gives you unlimited permission to link the
  12  * compiled version of this file with other programs, and to distribute
  13  * those programs without any restriction coming from the use of this
  14  * file.  (The General Public License restrictions do apply in other
  15  * respects; for example, they cover modification of the file, and
  16  * distribution when not linked into another program.)
  17  *
  18  * This file is distributed in the hope that it will be useful, but
  19  * WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  21  * General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; see the file COPYING.  If not, write to
  25  * the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  26  * Boston, MA 02110-1301, USA.
  27  *
  28  *  As a special exception, if you link this library with files
  29  *  compiled with GCC to produce an executable, this does not cause the
  30  *  resulting executable to be covered by the GNU General Public License.
  31  *  This exception does not however invalidate any other reasons why the
  32  *  executable file might be covered by the GNU General Public License.
  33  */
  34
  35 /* Vector save/restore routines for Darwin.  Note that each vector
  36    save/restore requires 2 instructions (8 bytes.)
  37
  38    THE SAVE AND RESTORE ROUTINES CAN HAVE ONLY ONE GLOBALLY VISIBLE
  39    ENTRY POINT - callers have to jump to "saveFP+60" to save f29..f31,
  40    for example.  For FP reg saves/restores, it takes one instruction
  41    (4 bytes) to do the operation; for Vector regs, 2 instructions are
  42    required (8 bytes.).   */
  43
  44         .machine ppc7400
  45 .text
  46         .align 2
  47
  48 .private_extern saveVEC
  49 saveVEC:
  50         li r11,-192
  51         stvx v20,r11,r0
  52         li r11,-176
  53         stvx v21,r11,r0
  54         li r11,-160
  55         stvx v22,r11,r0
  56         li r11,-144
  57         stvx v23,r11,r0
  58         li r11,-128
  59         stvx v24,r11,r0
  60         li r11,-112
  61         stvx v25,r11,r0
  62         li r11,-96
  63         stvx v26,r11,r0
  64         li r11,-80
  65         stvx v27,r11,r0
  66         li r11,-64
  67         stvx v28,r11,r0
  68         li r11,-48
  69         stvx v29,r11,r0
  70         li r11,-32
  71         stvx v30,r11,r0
  72         li r11,-16
  73         stvx v31,r11,r0
  74         blr
  75
  76 .private_extern restVEC
  77 restVEC:
  78         li r11,-192
  79         lvx v20,r11,r0
  80         li r11,-176
  81         lvx v21,r11,r0
  82         li r11,-160
  83         lvx v22,r11,r0
  84         li r11,-144
  85         lvx v23,r11,r0
  86         li r11,-128
  87         lvx v24,r11,r0
  88         li r11,-112
  89         lvx v25,r11,r0
  90         li r11,-96
  91         lvx v26,r11,r0
  92         li r11,-80
  93         lvx v27,r11,r0
  94         li r11,-64
  95         lvx v28,r11,r0
  96         li r11,-48
  97         lvx v29,r11,r0
  98         li r11,-32
  99         lvx v30,r11,r0
 100         li r11,-16
 101         lvx v31,r11,r0
 102         blr
 103
 104 /* saveVEC_vr11 -- as saveVEC but VRsave is returned in R11.  */
 105
 106 .private_extern saveVEC_vr11
 107 saveVEC_vr11:
 108         li r11,-192
 109         stvx v20,r11,r0
 110         li r11,-176
 111         stvx v21,r11,r0
 112         li r11,-160
 113         stvx v22,r11,r0
 114         li r11,-144
 115         stvx v23,r11,r0
 116         li r11,-128
 117         stvx v24,r11,r0
 118         li r11,-112
 119         stvx v25,r11,r0
 120         li r11,-96
 121         stvx v26,r11,r0
 122         li r11,-80
 123         stvx v27,r11,r0
 124         li r11,-64
 125         stvx v28,r11,r0
 126         li r11,-48
 127         stvx v29,r11,r0
 128         li r11,-32
 129         stvx v30,r11,r0
 130         li r11,-16
 131         stvx v31,r11,r0
 132         mfspr r11,VRsave
 133         blr
 134
 135 /* As restVec, but the original VRsave value passed in R10.  */
 136
 137 .private_extern restVEC_vr10
 138 restVEC_vr10:
 139         li r11,-192
 140         lvx v20,r11,r0
 141         li r11,-176
 142         lvx v21,r11,r0
 143         li r11,-160
 144         lvx v22,r11,r0
 145         li r11,-144
 146         lvx v23,r11,r0
 147         li r11,-128
 148         lvx v24,r11,r0
 149         li r11,-112
 150         lvx v25,r11,r0
 151         li r11,-96
 152         lvx v26,r11,r0
 153         li r11,-80
 154         lvx v27,r11,r0
 155         li r11,-64
 156         lvx v28,r11,r0
 157         li r11,-48
 158         lvx v29,r11,r0
 159         li r11,-32
 160         lvx v30,r11,r0
 161         li r11,-16
 162         lvx v31,r11,r0
 163                                 /* restore VRsave from R10.  */
 164         mtspr VRsave,r10
 165         blr