maskbits.h revision 1.1.8.2
1 1.1.8.2 jruoho /* $NetBSD: maskbits.h,v 1.1.8.2 2011/06/06 09:05:39 jruoho Exp $ */ 2 1.1.8.2 jruoho 3 1.1.8.2 jruoho /*- 4 1.1.8.2 jruoho * Copyright (c) 1994 5 1.1.8.2 jruoho * The Regents of the University of California. All rights reserved. 6 1.1.8.2 jruoho * 7 1.1.8.2 jruoho * Redistribution and use in source and binary forms, with or without 8 1.1.8.2 jruoho * modification, are permitted provided that the following conditions 9 1.1.8.2 jruoho * are met: 10 1.1.8.2 jruoho * 1. Redistributions of source code must retain the above copyright 11 1.1.8.2 jruoho * notice, this list of conditions and the following disclaimer. 12 1.1.8.2 jruoho * 2. Redistributions in binary form must reproduce the above copyright 13 1.1.8.2 jruoho * notice, this list of conditions and the following disclaimer in the 14 1.1.8.2 jruoho * documentation and/or other materials provided with the distribution. 15 1.1.8.2 jruoho * 3. Neither the name of the University nor the names of its contributors 16 1.1.8.2 jruoho * may be used to endorse or promote products derived from this software 17 1.1.8.2 jruoho * without specific prior written permission. 18 1.1.8.2 jruoho * 19 1.1.8.2 jruoho * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 1.1.8.2 jruoho * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 1.1.8.2 jruoho * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 1.1.8.2 jruoho * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 1.1.8.2 jruoho * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 1.1.8.2 jruoho * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 1.1.8.2 jruoho * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 1.1.8.2 jruoho * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 1.1.8.2 jruoho * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 1.1.8.2 jruoho * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 1.1.8.2 jruoho * SUCH DAMAGE. 30 1.1.8.2 jruoho * 31 1.1.8.2 jruoho * @(#)maskbits.h 8.2 (Berkeley) 3/21/94 32 1.1.8.2 jruoho */ 33 1.1.8.2 jruoho 34 1.1.8.2 jruoho /* 35 1.1.8.2 jruoho * Derived from X11R4 36 1.1.8.2 jruoho */ 37 1.1.8.2 jruoho 38 1.1.8.2 jruoho /* the following notes use the following conventions: 39 1.1.8.2 jruoho SCREEN LEFT SCREEN RIGHT 40 1.1.8.2 jruoho in this file and maskbits.c, left and right refer to screen coordinates, 41 1.1.8.2 jruoho NOT bit numbering in registers. 42 1.1.8.2 jruoho 43 1.1.8.2 jruoho starttab[n] 44 1.1.8.2 jruoho bits[0,n-1] = 0 bits[n,31] = 1 45 1.1.8.2 jruoho endtab[n] = 46 1.1.8.2 jruoho bits[0,n-1] = 1 bits[n,31] = 0 47 1.1.8.2 jruoho 48 1.1.8.2 jruoho maskbits(x, w, startmask, endmask, nlw) 49 1.1.8.2 jruoho for a span of width w starting at position x, returns 50 1.1.8.2 jruoho a mask for ragged bits at start, mask for ragged bits at end, 51 1.1.8.2 jruoho and the number of whole longwords between the ends. 52 1.1.8.2 jruoho 53 1.1.8.2 jruoho */ 54 1.1.8.2 jruoho 55 1.1.8.2 jruoho #define maskbits(x, w, startmask, endmask, nlw) \ 56 1.1.8.2 jruoho do { \ 57 1.1.8.2 jruoho startmask = starttab[(x) & 0x1f]; \ 58 1.1.8.2 jruoho endmask = endtab[((x)+(w)) & 0x1f]; \ 59 1.1.8.2 jruoho if (startmask) \ 60 1.1.8.2 jruoho nlw = (((w) - (32 - ((x)&0x1f))) >> 5); \ 61 1.1.8.2 jruoho else \ 62 1.1.8.2 jruoho nlw = (w) >> 5; \ 63 1.1.8.2 jruoho } while (/* CONSTCOND */ 0) 64 1.1.8.2 jruoho 65 1.1.8.2 jruoho #define FASTGETBITS(psrc, x, w, dst) \ 66 1.1.8.2 jruoho __asm ("bfextu %3{%1:%2},%0" \ 67 1.1.8.2 jruoho : "=d" (dst) : "di" (x), "di" (w), "o" (*(char *)(psrc))) 68 1.1.8.2 jruoho 69 1.1.8.2 jruoho #define FASTPUTBITS(src, x, w, pdst) \ 70 1.1.8.2 jruoho __asm ("bfins %3,%0{%1:%2}" \ 71 1.1.8.2 jruoho : "=o" (*(char *)(pdst)) \ 72 1.1.8.2 jruoho : "di" (x), "di" (w), "d" (src)) 73 1.1.8.2 jruoho 74 1.1.8.2 jruoho #define getandputrop(psrc, srcbit, dstbit, width, pdst, rop) \ 75 1.1.8.2 jruoho do { \ 76 1.1.8.2 jruoho unsigned int _tmpsrc, _tmpdst; \ 77 1.1.8.2 jruoho FASTGETBITS(pdst, dstbit, width, _tmpdst); \ 78 1.1.8.2 jruoho FASTGETBITS(psrc, srcbit, width, _tmpsrc); \ 79 1.1.8.2 jruoho DoRop(_tmpdst, rop, _tmpsrc, _tmpdst); \ 80 1.1.8.2 jruoho FASTPUTBITS(_tmpdst, dstbit, width, pdst); \ 81 1.1.8.2 jruoho } while (/* CONSTCOND */ 0) 82 1.1.8.2 jruoho 83 1.1.8.2 jruoho #define getandputrop0(psrc, srcbit, width, pdst, rop) \ 84 1.1.8.2 jruoho getandputrop(psrc, srcbit, 0, width, pdst, rop) 85 1.1.8.2 jruoho 86 1.1.8.2 jruoho #define getunalignedword(psrc, x, dst) \ 87 1.1.8.2 jruoho do { \ 88 1.1.8.2 jruoho int _tmp; \ 89 1.1.8.2 jruoho FASTGETBITS(psrc, x, 32, _tmp); \ 90 1.1.8.2 jruoho dst = _tmp; \ 91 1.1.8.2 jruoho } while (/* CONSTCOND */ 0) 92 1.1.8.2 jruoho 93 1.1.8.2 jruoho #define fnCLEAR(src, dst) (0) 94 1.1.8.2 jruoho #define fnCOPY(src, dst) (src) 95 1.1.8.2 jruoho #define fnXOR(src, dst) (src ^ dst) 96 1.1.8.2 jruoho #define fnCOPYINVERTED(src, dst)(~src) 97 1.1.8.2 jruoho 98 1.1.8.2 jruoho #define DoRop(result, alu, src, dst) \ 99 1.1.8.2 jruoho do { \ 100 1.1.8.2 jruoho if (alu == RR_COPY) \ 101 1.1.8.2 jruoho result = fnCOPY (src, dst); \ 102 1.1.8.2 jruoho else { \ 103 1.1.8.2 jruoho switch (alu) { \ 104 1.1.8.2 jruoho case RR_CLEAR: \ 105 1.1.8.2 jruoho result = fnCLEAR (src, dst); \ 106 1.1.8.2 jruoho break; \ 107 1.1.8.2 jruoho case RR_XOR: \ 108 1.1.8.2 jruoho result = fnXOR (src, dst); \ 109 1.1.8.2 jruoho break; \ 110 1.1.8.2 jruoho case RR_COPYINVERTED: \ 111 1.1.8.2 jruoho result = fnCOPYINVERTED (src, dst); \ 112 1.1.8.2 jruoho break; \ 113 1.1.8.2 jruoho } \ 114 1.1.8.2 jruoho } \ 115 1.1.8.2 jruoho } while (/* CONSTCOND */ 0) 116
Indexes created Sun Oct 19 02:09:48 GMT 2025