Return to alloca.s CVS log

Up to [CSRG BSD Unix] / 43BSDReno / lib / libc / hp300 / gen

Annotation of 43BSDReno/lib/libc/hp300/gen/alloca.s, revision 1.1.1.1

1.1       root        1: /*-
                      2:  * Copyright (c) 1990 The Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * This code is derived from software contributed to Berkeley by
                      6:  * the Systems Programming Group of the University of Utah Computer
                      7:  * Science Department.
                      8:  *
                      9:  * Redistribution and use in source and binary forms are permitted
                     10:  * provided that: (1) source distributions retain this entire copyright
                     11:  * notice and comment, and (2) distributions including binaries display
                     12:  * the following acknowledgement:  ``This product includes software
                     13:  * developed by the University of California, Berkeley and its contributors''
                     14:  * in the documentation or other materials provided with the distribution
                     15:  * and in all advertising materials mentioning features or use of this
                     16:  * software. Neither the name of the University nor the names of its
                     17:  * contributors may be used to endorse or promote products derived
                     18:  * from this software without specific prior written permission.
                     19:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     20:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     21:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     22:  */
                     23: 
                     24: #if defined(LIBC_SCCS) && !defined(lint)
                     25:        .asciz "@(#)alloca.s    5.1 (Berkeley) 5/12/90"
                     26: #endif /* LIBC_SCCS and not lint */
                     27: 
                     28: /* like alloc, but automatic free in return */
                     29: 
                     30: #include "DEFS.h"
                     31: 
                     32: ENTRY(alloca)
                     33:        movl    sp@,a0          /* save return addr */
                     34:        movl    sp,d0           /* get current SP value */
                     35:        subl    sp@(4),d0       /* allocate requested space */
                     36:        andb    #~3,d0          /* longword align for efficiency */
                     37:        addql   #8,d0           /* reuse space of call frame */
                     38:        movl    d0,sp           /* set new SP value */
                     39:        lea     sp@(-4),sp      /* account for argument pop in caller */
                     40:        jmp     a0@             /* funny return */

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.