usr/src/lib/libcurses/screen/memSset.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1988 AT&T */
  28 /*        All Rights Reserved   */
  29
  30 /*
  31  * University Copyright- Copyright (c) 1982, 1986, 1988
  32  * The Regents of the University of California
  33  * All Rights Reserved
  34  *
  35  * University Acknowledgment- Portions of this document are derived from
  36  * software developed by the University of California, Berkeley, and its
  37  * contributors.
  38  */
  39
  40 #pragma ident   "%Z%%M% %I%     %E% SMI"
  41
  42 /*LINTLIBRARY*/
  43
  44 #include <sys/types.h>
  45 #include "curses.h"
  46
  47 /*
  48  * additional memory routine to deal with memory areas in units of chtypes.
  49  */
  50
  51 void
  52 memSset(chtype *s, chtype c, int n)
  53
  54 #if u3b
  55 {
  56         int count;                      /* %r8 */
  57         char *from;                     /* %r7 */
  58         char *to;                       /* %r6 */
  59
  60         count = (n - 1) * sizeof (chtype);
  61         if (count > 0) {
  62                 chtype *sfrom = s;      /* %r5 */
  63
  64                 to = (char *)(sfrom + 1);
  65                 from = (char *)sfrom;
  66                 *sfrom = c;
  67                 asm("   movblkb %r8, %r7, %r6");
  68                 /* bcopy (count, to, from) */
  69         } else if (count == 0)
  70                 *s = c;
  71 }
  72 #else
  73 #if u3b2 || u3b15
  74 {
  75         char *to;                       /* 0(%fp) */
  76         char *from;                     /* 4(%fp) */
  77         int count;              /* %r8 */
  78
  79         count = (n - 1) * sizeof (chtype);
  80         if (count > 0) {
  81                 chtype *sfrom = s;      /* %r7 */
  82
  83                 to = (char *)(sfrom + 1);
  84                 from = (char *)sfrom;
  85                 *sfrom = c;
  86
  87 /* Evidently one can not specify the regs for movblb. So I move */
  88 /* them in myself below to the regs where they belong. */
  89                 asm("   movw    %r8,%r2");      /* count */
  90                 asm("   movw    0(%fp),%r1");   /* to */
  91                 asm("   movw    4(%fp),%r0");   /* from */
  92                 asm("   movblb");
  93         } else if (count == 0)
  94                 *s = c;
  95 }
  96 #else
  97 {
  98     while (n-- > 0)
  99         *s++ = c;
 100 }
 101 #endif /* u3b2 || u3b15 */
 102 #endif /* u3b */
 103
 104 /* The vax block copy command doesn't work the way I want. */
 105 /* If anyone finds a version that does, I'd like to know. */
 106 #if __bad__vax__
 107
 108 /* this is the code within memcpy which shows how to do a block copy */
 109
 110 memcpy(char *to, char *from, int count)
 111 {
 112         if (count > 0) {
 113                 asm("   movc3   12(ap),*4(ap),*8(ap)");
 114         }
 115 }
 116 #endif /* __bad__vax__ */