/*      $NetBSD: maskbits.h,v 1.1 2023/02/11 05:59:39 tsutsui Exp $     */
/*      $OpenBSD: maskbits.h,v 1.1 2006/08/05 10:00:30 miod Exp $       */

/*-
* Copyright (c) 1994
*      The Regents of the University of California.  All rights reserved.
*
* 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.
*
*      @(#)maskbits.h  8.2 (Berkeley) 3/21/94
*/

/*
* Derived from X11R4
*/

#define FASTGETBITS(psrc,x,w,dst)                                       \
       __asm__ ("extzv %1,%2,%3,%0"                                    \
               : "=g" (dst)                                            \
               : "g" (x), "g" (w), "m" (*(char *)(psrc)))

#define FASTPUTBITS(src, x, w, pdst)                                    \
       __asm__ ("insv %3,%1,%2,%0"                                     \
               : "=m" (*(char *)(pdst))                                \
               : "g" (x), "g" (w), "g" (src))

#define RR_CLEAR        0x00
#define RR_SET          0x01
#define RR_COPY         0x02

#define getandputrop(psrc, srcbit, dstbit, width, pdst, rop)            \
do {                                                                    \
       unsigned int _tmpdst;                                           \
       switch (rop) {                                                  \
       case RR_CLEAR:                                                  \
               _tmpdst = 0;                                            \
               break;                                                  \
       case RR_SET:                                                    \
               _tmpdst = ~0;                                           \
               break;                                                  \
       default:                                                        \
               FASTGETBITS(psrc, srcbit, width, _tmpdst);              \
               break;                                                  \
       }                                                               \
       FASTPUTBITS(_tmpdst, dstbit, width, pdst);                      \
} while (0)

#define getunalignedword(psrc, x, dst)                                  \
do {                                                                    \
       int _tmp;                                                       \
       FASTGETBITS(psrc, x, 32, _tmp);                                 \
       dst = _tmp;                                                     \
} while (0)