libgcc/config/rs6000/darwin-vecsave.S

   1 /*  This file contains the vector save and restore routines.
   2  *
   3  *   Copyright (C) 2004-2023 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 3, or (at your option) any
   8  * later version.
   9  *
  10  * This file is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * Under Section 7 of GPL version 3, you are granted additional
  16  * permissions described in the GCC Runtime Library Exception, version
  17  * 3.1, as published by the Free Software Foundation.
  18  *
  19  * You should have received a copy of the GNU General Public License and
  20  * a copy of the GCC Runtime Library Exception along with this program;
  21  * see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  22  * <http://www.gnu.org/licenses/>.
  23  */
  24
  25 /* Vector save/restore routines for Darwin.  Note that each vector
  26    save/restore requires 2 instructions (8 bytes.)
  27
  28    THE SAVE AND RESTORE ROUTINES CAN HAVE ONLY ONE GLOBALLY VISIBLE
  29    ENTRY POINT - callers have to jump to "saveFP+60" to save f29..f31,
  30    for example.  For FP reg saves/restores, it takes one instruction
  31    (4 bytes) to do the operation; for Vector regs, 2 instructions are
  32    required (8 bytes.).   */
  33
  34 /* With some assemblers, we need the correct machine directive to get the
  35    right CPU type / subtype in the file header.  */
  36 #if     __ppc64__
  37         .machine ppc64
  38 #else
  39         .machine ppc7400
  40 #endif
  41         .text
  42         .align 2
  43
  44 .private_extern saveVEC
  45 saveVEC:
  46         li r11,-192
  47         stvx v20,r11,r0
  48         li r11,-176
  49         stvx v21,r11,r0
  50         li r11,-160
  51         stvx v22,r11,r0
  52         li r11,-144
  53         stvx v23,r11,r0
  54         li r11,-128
  55         stvx v24,r11,r0
  56         li r11,-112
  57         stvx v25,r11,r0
  58         li r11,-96
  59         stvx v26,r11,r0
  60         li r11,-80
  61         stvx v27,r11,r0
  62         li r11,-64
  63         stvx v28,r11,r0
  64         li r11,-48
  65         stvx v29,r11,r0
  66         li r11,-32
  67         stvx v30,r11,r0
  68         li r11,-16
  69         stvx v31,r11,r0
  70         blr
  71
  72 .private_extern restVEC
  73 restVEC:
  74         li r11,-192
  75         lvx v20,r11,r0
  76         li r11,-176
  77         lvx v21,r11,r0
  78         li r11,-160
  79         lvx v22,r11,r0
  80         li r11,-144
  81         lvx v23,r11,r0
  82         li r11,-128
  83         lvx v24,r11,r0
  84         li r11,-112
  85         lvx v25,r11,r0
  86         li r11,-96
  87         lvx v26,r11,r0
  88         li r11,-80
  89         lvx v27,r11,r0
  90         li r11,-64
  91         lvx v28,r11,r0
  92         li r11,-48
  93         lvx v29,r11,r0
  94         li r11,-32
  95         lvx v30,r11,r0
  96         li r11,-16
  97         lvx v31,r11,r0
  98         blr
  99
 100 /* saveVEC_vr11 -- as saveVEC but VRsave is returned in R11.  */
 101
 102 .private_extern saveVEC_vr11
 103 saveVEC_vr11:
 104         li r11,-192
 105         stvx v20,r11,r0
 106         li r11,-176
 107         stvx v21,r11,r0
 108         li r11,-160
 109         stvx v22,r11,r0
 110         li r11,-144
 111         stvx v23,r11,r0
 112         li r11,-128
 113         stvx v24,r11,r0
 114         li r11,-112
 115         stvx v25,r11,r0
 116         li r11,-96
 117         stvx v26,r11,r0
 118         li r11,-80
 119         stvx v27,r11,r0
 120         li r11,-64
 121         stvx v28,r11,r0
 122         li r11,-48
 123         stvx v29,r11,r0
 124         li r11,-32
 125         stvx v30,r11,r0
 126         li r11,-16
 127         stvx v31,r11,r0
 128         mfspr r11,VRsave
 129         blr
 130
 131 /* As restVec, but the original VRsave value passed in R10.  */
 132
 133 .private_extern restVEC_vr10
 134 restVEC_vr10:
 135         li r11,-192
 136         lvx v20,r11,r0
 137         li r11,-176
 138         lvx v21,r11,r0
 139         li r11,-160
 140         lvx v22,r11,r0
 141         li r11,-144
 142         lvx v23,r11,r0
 143         li r11,-128
 144         lvx v24,r11,r0
 145         li r11,-112
 146         lvx v25,r11,r0
 147         li r11,-96
 148         lvx v26,r11,r0
 149         li r11,-80
 150         lvx v27,r11,r0
 151         li r11,-64
 152         lvx v28,r11,r0
 153         li r11,-48
 154         lvx v29,r11,r0
 155         li r11,-32
 156         lvx v30,r11,r0
 157         li r11,-16
 158         lvx v31,r11,r0
 159                                 /* restore VRsave from R10.  */
 160         mtspr VRsave,r10
 161         blr