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https://github.com/autc04/Retro68.git
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156 lines
3.2 KiB
ArmAsm
156 lines
3.2 KiB
ArmAsm
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/* This file contains the vector save and restore routines.
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*
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* Copyright (C) 2004, 2009 Free Software Foundation, Inc.
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*
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* This file is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 3, or (at your option) any
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* later version.
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*
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* This file is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* Under Section 7 of GPL version 3, you are granted additional
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* permissions described in the GCC Runtime Library Exception, version
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* 3.1, as published by the Free Software Foundation.
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*
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* You should have received a copy of the GNU General Public License and
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* a copy of the GCC Runtime Library Exception along with this program;
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* see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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/* Vector save/restore routines for Darwin. Note that each vector
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save/restore requires 2 instructions (8 bytes.)
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THE SAVE AND RESTORE ROUTINES CAN HAVE ONLY ONE GLOBALLY VISIBLE
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ENTRY POINT - callers have to jump to "saveFP+60" to save f29..f31,
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for example. For FP reg saves/restores, it takes one instruction
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(4 bytes) to do the operation; for Vector regs, 2 instructions are
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required (8 bytes.). */
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.machine ppc7400
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.text
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.align 2
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.private_extern saveVEC
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saveVEC:
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li r11,-192
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stvx v20,r11,r0
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li r11,-176
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stvx v21,r11,r0
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li r11,-160
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stvx v22,r11,r0
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li r11,-144
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stvx v23,r11,r0
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li r11,-128
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stvx v24,r11,r0
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li r11,-112
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stvx v25,r11,r0
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li r11,-96
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stvx v26,r11,r0
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li r11,-80
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stvx v27,r11,r0
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li r11,-64
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stvx v28,r11,r0
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li r11,-48
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stvx v29,r11,r0
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li r11,-32
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stvx v30,r11,r0
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li r11,-16
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stvx v31,r11,r0
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blr
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.private_extern restVEC
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restVEC:
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li r11,-192
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lvx v20,r11,r0
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li r11,-176
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lvx v21,r11,r0
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li r11,-160
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lvx v22,r11,r0
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li r11,-144
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lvx v23,r11,r0
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li r11,-128
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lvx v24,r11,r0
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li r11,-112
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lvx v25,r11,r0
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li r11,-96
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lvx v26,r11,r0
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li r11,-80
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lvx v27,r11,r0
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li r11,-64
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lvx v28,r11,r0
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li r11,-48
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lvx v29,r11,r0
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li r11,-32
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lvx v30,r11,r0
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li r11,-16
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lvx v31,r11,r0
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blr
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/* saveVEC_vr11 -- as saveVEC but VRsave is returned in R11. */
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.private_extern saveVEC_vr11
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saveVEC_vr11:
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li r11,-192
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stvx v20,r11,r0
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li r11,-176
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stvx v21,r11,r0
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li r11,-160
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stvx v22,r11,r0
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li r11,-144
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stvx v23,r11,r0
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li r11,-128
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stvx v24,r11,r0
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li r11,-112
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stvx v25,r11,r0
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li r11,-96
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stvx v26,r11,r0
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li r11,-80
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stvx v27,r11,r0
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li r11,-64
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stvx v28,r11,r0
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li r11,-48
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stvx v29,r11,r0
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li r11,-32
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stvx v30,r11,r0
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li r11,-16
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stvx v31,r11,r0
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mfspr r11,VRsave
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blr
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/* As restVec, but the original VRsave value passed in R10. */
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.private_extern restVEC_vr10
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restVEC_vr10:
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li r11,-192
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lvx v20,r11,r0
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li r11,-176
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lvx v21,r11,r0
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li r11,-160
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lvx v22,r11,r0
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li r11,-144
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lvx v23,r11,r0
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li r11,-128
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lvx v24,r11,r0
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li r11,-112
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lvx v25,r11,r0
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li r11,-96
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lvx v26,r11,r0
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li r11,-80
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lvx v27,r11,r0
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li r11,-64
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lvx v28,r11,r0
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li r11,-48
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lvx v29,r11,r0
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li r11,-32
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lvx v30,r11,r0
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li r11,-16
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lvx v31,r11,r0
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/* restore VRsave from R10. */
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mtspr VRsave,r10
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blr
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