1 /* $NetBSD: maskbits.h,v 1.1 2023/02/11 05:59:39 tsutsui Exp $ */ 2 /* $OpenBSD: maskbits.h,v 1.1 2006/08/05 10:00:30 miod Exp $ */ 3 4 /*- 5 * Copyright (c) 1994 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)maskbits.h 8.2 (Berkeley) 3/21/94 33 */ 34 35 /* 36 * Derived from X11R4 37 */ 38 39 #define FASTGETBITS(psrc,x,w,dst) \ 40 __asm__ ("extzv %1,%2,%3,%0" \ 41 : "=g" (dst) \ 42 : "g" (x), "g" (w), "m" (*(char *)(psrc))) 43 44 #define FASTPUTBITS(src, x, w, pdst) \ 45 __asm__ ("insv %3,%1,%2,%0" \ 46 : "=m" (*(char *)(pdst)) \ 47 : "g" (x), "g" (w), "g" (src)) 48 49 #define RR_CLEAR 0x00 50 #define RR_SET 0x01 51 #define RR_COPY 0x02 52 53 #define getandputrop(psrc, srcbit, dstbit, width, pdst, rop) \ 54 do { \ 55 unsigned int _tmpdst; \ 56 switch (rop) { \ 57 case RR_CLEAR: \ 58 _tmpdst = 0; \ 59 break; \ 60 case RR_SET: \ 61 _tmpdst = ~0; \ 62 break; \ 63 default: \ 64 FASTGETBITS(psrc, srcbit, width, _tmpdst); \ 65 break; \ 66 } \ 67 FASTPUTBITS(_tmpdst, dstbit, width, pdst); \ 68 } while (0) 69 70 #define getunalignedword(psrc, x, dst) \ 71 do { \ 72 int _tmp; \ 73 FASTGETBITS(psrc, x, 32, _tmp); \ 74 dst = _tmp; \ 75 } while (0) 76