/*      $OpenBSD: _setjmp.S,v 1.2 2007/03/02 06:11:54 miod Exp $        */
/*      $NetBSD: _setjmp.S,v 1.7 2006/01/05 02:04:41 uwe Exp $  */

/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * William Jolitz.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      from: @(#)_setjmp.s     5.1 (Berkeley) 4/23/90
 */

#include <machine/asm.h>
#include <machine/setjmp.h>

/*
 * C library -- _setjmp, _longjmp
 *
 *      _longjmp(a,v)
 * will generate a "return(v)" from the last call to
 *      _setjmp(a)
 * by restoring registers from the stack.
 * The previous signal state is NOT restored.
 */

ENTRY(_setjmp)
        xor     r0,     r0
#if defined(__SH4__) && !defined(__SH4_NOFPU__)
        add     #(_JBLEN * 4), r4
        sts     fpscr,  r1
        mov.l   r1,     @-r4
        lds     r0,     fpscr
        sts.l   fpul,   @-r4
        fmov.s  fr15,   @-r4
        fmov.s  fr14,   @-r4
        fmov.s  fr13,   @-r4
        fmov.s  fr12,   @-r4
        frchg
        fmov.s  fr15,   @-r4
        fmov.s  fr14,   @-r4
        fmov.s  fr13,   @-r4
        fmov.s  fr12,   @-r4
        lds     r1,     fpscr
#else
        add     #((_JBLEN - 10) * 4), r4
#endif
        sts.l   mach,   @-r4
        sts.l   macl,   @-r4
        mov.l   r15,    @-r4
        mov.l   r14,    @-r4
        mov.l   r13,    @-r4
        mov.l   r12,    @-r4
        mov.l   r11,    @-r4
        mov.l   r10,    @-r4
        mov.l   r9,     @-r4
        mov.l   r8,     @-r4
        sts.l   pr,     @-r4
        mov.l   r0,     @-r4            /* dummy signal mask */
        rts
         mov.l  r0,     @-r4            /* no saved signal mask */
        SET_ENTRY_SIZE(_setjmp)

ENTRY(_longjmp)
        add     #8,     r4
        lds.l   @r4+,   pr
        mov.l   @r4+,   r8
        mov.l   @r4+,   r9
        mov.l   @r4+,   r10
        mov.l   @r4+,   r11
        mov.l   @r4+,   r12
        mov.l   @r4+,   r13
        mov.l   @r4+,   r14
        mov.l   @r4+,   r15
        lds.l   @r4+,   macl
        lds.l   @r4+,   mach
#if defined(__SH4__) && !defined(__SH4_NOFPU__)
        xor     r0,     r0
        lds     r0,     fpscr
        frchg
        fmov.s  @r4+,   fr12
        fmov.s  @r4+,   fr13
        fmov.s  @r4+,   fr14
        fmov.s  @r4+,   fr15
        frchg
        fmov.s  @r4+,   fr12
        fmov.s  @r4+,   fr13
        fmov.s  @r4+,   fr14
        fmov.s  @r4+,   fr15
        lds.l   @r4+,   fpul
        lds.l   @r4+,   fpscr
#endif

        mov     r5,     r0
        tst     r0,     r0
        bf      .L0
        add     #1,     r0
.L0:
        rts
         nop
        SET_ENTRY_SIZE(_longjmp)