/* $NetBSD: maskbits.h,v 1.1.2.2 2023/02/15 19:14:50 martin 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)