1/* 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This software was developed by the Computer Systems Engineering group 6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 7 * contributed to Berkeley. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * from: Header: fixunsdfsi.s,v 1.3 91/10/08 00:03:15 torek Exp 34 */ 35 36#include <machine/asm.h> 37 38#if defined(LIBC_SCCS) && !defined(lint) 39 .asciz "@(#)fixunsdfsi.s 8.1 (Berkeley) 6/4/93" 40#if 0 41 RCSID("$NetBSD: fixunsdfsi.S,v 1.3 2000/07/25 04:26:12 mycroft Exp $") 42#endif 43#endif /* LIBC_SCCS and not lint */ 44__FBSDID("$FreeBSD$"); 45 46/* 47 * Convert double to unsigned integer (for gcc). 48 * 49 * I have made the output for NaN agree with the Sun compiler, not 50 * that it really matters, by using `fbul,a'. 51 */ 52 53 54 .align 8 55.Lbig: 56 .word 0x43e00000 ! .double 2^63 57 .word 0 ! (who me, not trust the assembler?) 58 59/* 60 * Same as above but to unsigned long 61 */ 62ENTRY(__dtoul) 63 PIC_PROLOGUE(%o4, %o5) 64 sub %sp, 16, %sp 65 std %f2, [%sp + CCFSZ + SPOFF + 8] 66 SET(.Lbig, %o5, %o3) 67 ldd [%o3], %f2 68 fcmped %f0, %f2 ! d < 2^63, or NaN, or -Inf? 69 fbul,a 1f ! if so, use fdtox to convert to long 70 fdtox %f0, %f0 ! (this includes negatives!) 71 72 ! d does not fit in a long, so subtract 2^63, convert, 73 ! and add 2^63 again (sigh). Just hope the intermediate 74 ! fits (if not, the result is undefined anyway). 75 76 fsubd %f0, %f2, %f0 ! d -= 2^63 77 fdtox %f0, %f0 ! convert to long 78 std %f0, [%sp + CCFSZ + SPOFF] ! move into return reg 79 ldx [%sp + CCFSZ + SPOFF], %o0 80 sethi %hi(0x80000000), %o1 81 sllx %o1, 32, %o1 82 add %o0, %o1, %o0 ! add 2^63 83 ldd [%sp + CCFSZ + SPOFF + 8], %f2 84 retl 85 add %sp, 16, %sp 86 871: 88 std %f0, [%sp + CCFSZ + SPOFF] ! return result 89 ldx [%sp + CCFSZ + SPOFF], %o0 90 ldd [%sp + CCFSZ + SPOFF + 8], %f2 91 retl 92 add %sp, 16, %sp 93END(__dtoul) 94