gcc/libgcc/config/rs6000/darwin-vecsave.S

/*  This file contains the vector save and restore routines.
 *
 *   Copyright (C) 2004-2022 Free Software Foundation, Inc.
 * 
 * This file is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 3, or (at your option) any
 * later version.
 * 
 * This file is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 * 
 * Under Section 7 of GPL version 3, you are granted additional
 * permissions described in the GCC Runtime Library Exception, version
 * 3.1, as published by the Free Software Foundation.
 *
 * You should have received a copy of the GNU General Public License and
 * a copy of the GCC Runtime Library Exception along with this program;
 * see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 * <http://www.gnu.org/licenses/>.
 */ 

/* Vector save/restore routines for Darwin.  Note that each vector
   save/restore requires 2 instructions (8 bytes.)

   THE SAVE AND RESTORE ROUTINES CAN HAVE ONLY ONE GLOBALLY VISIBLE
   ENTRY POINT - callers have to jump to "saveFP+60" to save f29..f31,
   for example.  For FP reg saves/restores, it takes one instruction
   (4 bytes) to do the operation; for Vector regs, 2 instructions are
   required (8 bytes.).   */

/* With some assemblers, we need the correct machine directive to get the
   right CPU type / subtype in the file header.  */
#if	__ppc64__
	.machine ppc64
#else
	.machine ppc7400
#endif
	.text
	.align 2

.private_extern saveVEC
saveVEC:
	li r11,-192
	stvx v20,r11,r0
	li r11,-176
	stvx v21,r11,r0
	li r11,-160
	stvx v22,r11,r0
	li r11,-144
	stvx v23,r11,r0
	li r11,-128
	stvx v24,r11,r0
	li r11,-112
	stvx v25,r11,r0
	li r11,-96
	stvx v26,r11,r0
	li r11,-80
	stvx v27,r11,r0
	li r11,-64
	stvx v28,r11,r0
	li r11,-48
	stvx v29,r11,r0
	li r11,-32
	stvx v30,r11,r0
	li r11,-16
	stvx v31,r11,r0
	blr

.private_extern restVEC
restVEC:
	li r11,-192
	lvx v20,r11,r0
	li r11,-176
	lvx v21,r11,r0
	li r11,-160
	lvx v22,r11,r0
	li r11,-144
	lvx v23,r11,r0
	li r11,-128
	lvx v24,r11,r0
	li r11,-112
	lvx v25,r11,r0
	li r11,-96
	lvx v26,r11,r0
	li r11,-80
	lvx v27,r11,r0
	li r11,-64
	lvx v28,r11,r0
	li r11,-48
	lvx v29,r11,r0
	li r11,-32
	lvx v30,r11,r0
	li r11,-16
	lvx v31,r11,r0
	blr

/* saveVEC_vr11 -- as saveVEC but VRsave is returned in R11.  */

.private_extern saveVEC_vr11
saveVEC_vr11:
	li r11,-192
	stvx v20,r11,r0
	li r11,-176
	stvx v21,r11,r0
	li r11,-160
	stvx v22,r11,r0
	li r11,-144
	stvx v23,r11,r0
	li r11,-128
	stvx v24,r11,r0
	li r11,-112
	stvx v25,r11,r0
	li r11,-96
	stvx v26,r11,r0
	li r11,-80
	stvx v27,r11,r0
	li r11,-64
	stvx v28,r11,r0
	li r11,-48
	stvx v29,r11,r0
	li r11,-32
	stvx v30,r11,r0
	li r11,-16
	stvx v31,r11,r0
	mfspr r11,VRsave
	blr

/* As restVec, but the original VRsave value passed in R10.  */

.private_extern restVEC_vr10
restVEC_vr10:
	li r11,-192
	lvx v20,r11,r0
	li r11,-176
	lvx v21,r11,r0
	li r11,-160
	lvx v22,r11,r0
	li r11,-144
	lvx v23,r11,r0
	li r11,-128
	lvx v24,r11,r0
	li r11,-112
	lvx v25,r11,r0
	li r11,-96
	lvx v26,r11,r0
	li r11,-80
	lvx v27,r11,r0
	li r11,-64
	lvx v28,r11,r0
	li r11,-48
	lvx v29,r11,r0
	li r11,-32
	lvx v30,r11,r0
	li r11,-16
	lvx v31,r11,r0
				/* restore VRsave from R10.  */
	mtspr VRsave,r10
	blr