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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [machine/] [i960/] [setjmp.S] - Blame information for rev 207

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1 207 jeremybenn
/*******************************************************************************
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 *
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 * Copyright (c) 1993 Intel Corporation
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 *
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 * Intel hereby grants you permission to copy, modify, and distribute this
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 * software and its documentation.  Intel grants this permission provided
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 * that the above copyright notice appears in all copies and that both the
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 * copyright notice and this permission notice appear in supporting
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 * documentation.  In addition, Intel grants this permission provided that
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 * you prominently mark as "not part of the original" any modifications
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 * made to this software or documentation, and that the name of Intel
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 * Corporation not be used in advertising or publicity pertaining to
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 * distribution of the software or the documentation without specific,
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 * written prior permission.
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 *
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 * Intel Corporation provides this AS IS, WITHOUT ANY WARRANTY, EXPRESS OR
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 * IMPLIED, INCLUDING, WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY
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 * OR FITNESS FOR A PARTICULAR PURPOSE.  Intel makes no guarantee or
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 * representations regarding the use of, or the results of the use of,
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 * the software and documentation in terms of correctness, accuracy,
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 * reliability, currentness, or otherwise; and you rely on the software,
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 * documentation and results solely at your own risk.
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 *
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 * IN NO EVENT SHALL INTEL BE LIABLE FOR ANY LOSS OF USE, LOSS OF BUSINESS,
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 * LOSS OF PROFITS, INDIRECT, INCIDENTAL, SPECIAL OR CONSEQUENTIAL DAMAGES
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 * OF ANY KIND.  IN NO EVENT SHALL INTEL'S TOTAL LIABILITY EXCEED THE SUM
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 * PAID TO INTEL FOR THE PRODUCT LICENSED HEREUNDER.
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 *
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 ******************************************************************************/
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/******************************************************************************/
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/*                                                                            */
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/*      setjmp(), longjmp()                                                   */
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/*                                                                            */
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/******************************************************************************/
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        .file "setjmp.as"
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        .text
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        /* .link_pix */
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        .align  4
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        .globl  _setjmp
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_setjmp:
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        flushreg
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        andnot  0xf,pfp,g1      /* get pfp, mask out return status bits */
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        st      g1, 0x58(g0)    /* save fp of caller*/
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   /* save globals not killed by the calling convention */
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        stq     g8, 0x40(g0)    /* save g8-g11*/
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        st      g12, 0x50(g0)   /* save g12*/
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        st      g14, 0x54(g0)   /* save g14*/
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   /* save previous frame local registers */
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        ldq     (g1), g4        /* get previous frame pfp, sp, rip, r3 */
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        stq     g4, (g0)        /* save pfp, sp, rip, r3 */
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        ldq     0x10(g1), g4    /* get previous frame r4-r7 */
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        stq     g4, 0x10(g0)    /* save r4-r7 */
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        ldq     0x20(g1), g4    /* get previous frame r8-r11 */
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        stq     g4, 0x20(g0)    /* save r8-r11 */
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        ldq     0x30(g1), g4    /* get previous frame r12-r15 */
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        stq     g4, 0x30(g0)    /* save r12-r15 */
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        mov     0, g0           /* return 0 */
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        ret
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   /*
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    * fake a return to the place that called the corresponding _setjmp
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   */
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        .align  4
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        .globl  _longjmp
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_longjmp:
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        call    0f              /* ensure there is at least one stack frame */
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0:
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        flushreg                /* do this before swapping stack */
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        ld      0x58(g0), pfp   /* get fp of caller of setjmp */
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   /* restore local registers
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    * the following code modifies the frame of the function which originally
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    *  called setjmp.
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    */
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        ldq     (g0), g4        /* get pfp, sp, rip, r3 */
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        stq     g4, (pfp)       /* restore pfp, sp, rip, r3 */
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        ldq     0x10(g0), g4    /* get r4-r7 */
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        stq     g4, 0x10(pfp)   /* restore r4-r7 */
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        ldq     0x20(g0), g4    /* get r8-r11 */
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        stq     g4, 0x20(pfp)   /* restore r8-r11 */
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        ldq     0x30(g0), g4    /* get r12-r15 */
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        stq     g4, 0x30(pfp)   /* restore r12-r15 */
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   /* restore global registers */
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        ldq     0x40(g0), g8    /* get old g8-g11 values */
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        ld      0x50(g0), g12   /* get old g12 value */
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        ld      0x54(g0), g14   /* get old g14 value */
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        mov     g1, g0          /* get return value */
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        cmpo    g0, 0           /* make sure it is not zero */
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        bne     0f
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        mov     1, g0           /* return 1 by default */
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0:
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        ret                     /* return to caller of _setjmp */

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