/* Function to force register windows to the stack. Copyright (C) 2005, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ #include <bits/xtensa-config.h> .text .align 4 .literal_position .global __window_spill .type __window_spill, @function __window_spill: entry a1, 48 bbci.l a0, 31, .L4 // branch if called with call4 bbsi.l a0, 30, .L12 // branch if called with call12 /* Called with call8: touch register NUM_REGS-12 (4/20/52) */ .L8: #if XCHAL_NUM_AREGS > 16 call12 1f retw .align 4 1: _entry a1, 48 // touch NUM_REGS-24 (x/8/40) #if XCHAL_NUM_AREGS == 32 mov a8, a0 retw #else _entry a1, 48 // touch NUM_REGS-36 (x/x/28) mov a12, a0 _entry a1, 48 // touch NUM_REGS-48 (x/x/16) mov a12, a0 _entry a1, 16 // touch NUM_REGS-60 (x/x/4) #endif #endif mov a4, a0 retw /* Called with call4: touch register NUM_REGS-8 (8/24/56) */ .L4: #if XCHAL_NUM_AREGS == 16 mov a8, a0 #else call12 1f retw .align 4 1: _entry a1, 48 // touch NUM_REGS-20 (x/12/44) mov a12, a0 #if XCHAL_NUM_AREGS > 32 _entry a1, 48 // touch NUM_REGS-32 (x/x/32) mov a12, a0 _entry a1, 48 // touch NUM_REGS-44 (x/x/20) mov a12, a0 _entry a1, 48 // touch NUM_REGS-56 (x/x/8) mov a8, a0 #endif #endif retw /* Called with call12: touch register NUM_REGS-16 (x/16/48) */ .L12: #if XCHAL_NUM_AREGS > 16 call12 1f retw .align 4 1: _entry a1, 48 // touch NUM_REGS-28 (x/4/36) #if XCHAL_NUM_AREGS == 32 mov a4, a0 #else mov a12, a0 _entry a1, 48 // touch NUM_REGS-40 (x/x/24) mov a12, a0 _entry a1, 48 // touch NUM_REGS-52 (x/x/12) mov a12, a0 #endif #endif retw