1*84d9c625SLionel Sambuc/* $NetBSD: fixunsdfsi.S,v 1.5 2013/09/12 15:36:16 joerg Exp $ */ 22fe8fb19SBen Gras 32fe8fb19SBen Gras/* 42fe8fb19SBen Gras * Copyright (c) 1992, 1993 52fe8fb19SBen Gras * The Regents of the University of California. All rights reserved. 62fe8fb19SBen Gras * 72fe8fb19SBen Gras * This software was developed by the Computer Systems Engineering group 82fe8fb19SBen Gras * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 92fe8fb19SBen Gras * contributed to Berkeley. 102fe8fb19SBen Gras * 112fe8fb19SBen Gras * Redistribution and use in source and binary forms, with or without 122fe8fb19SBen Gras * modification, are permitted provided that the following conditions 132fe8fb19SBen Gras * are met: 142fe8fb19SBen Gras * 1. Redistributions of source code must retain the above copyright 152fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer. 162fe8fb19SBen Gras * 2. Redistributions in binary form must reproduce the above copyright 172fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer in the 182fe8fb19SBen Gras * documentation and/or other materials provided with the distribution. 192fe8fb19SBen Gras * 3. Neither the name of the University nor the names of its contributors 202fe8fb19SBen Gras * may be used to endorse or promote products derived from this software 212fe8fb19SBen Gras * without specific prior written permission. 222fe8fb19SBen Gras * 232fe8fb19SBen Gras * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 242fe8fb19SBen Gras * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 252fe8fb19SBen Gras * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 262fe8fb19SBen Gras * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 272fe8fb19SBen Gras * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 282fe8fb19SBen Gras * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 292fe8fb19SBen Gras * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 302fe8fb19SBen Gras * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 312fe8fb19SBen Gras * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 322fe8fb19SBen Gras * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 332fe8fb19SBen Gras * SUCH DAMAGE. 342fe8fb19SBen Gras * 352fe8fb19SBen Gras * from: Header: fixunsdfsi.s,v 1.3 91/10/08 00:03:15 torek Exp 362fe8fb19SBen Gras */ 372fe8fb19SBen Gras 382fe8fb19SBen Gras#include <machine/asm.h> 392fe8fb19SBen Gras#define _LOCORE 402fe8fb19SBen Gras#include <machine/frame.h> 412fe8fb19SBen Gras#if defined(LIBC_SCCS) && !defined(lint) 422fe8fb19SBen Gras#if 0 432fe8fb19SBen Gras .asciz "@(#)fixunsdfsi.s 8.1 (Berkeley) 6/4/93" 442fe8fb19SBen Gras#else 45*84d9c625SLionel Sambuc RCSID("$NetBSD: fixunsdfsi.S,v 1.5 2013/09/12 15:36:16 joerg Exp $") 462fe8fb19SBen Gras#endif 472fe8fb19SBen Gras#endif /* LIBC_SCCS and not lint */ 482fe8fb19SBen Gras 492fe8fb19SBen Gras/* 502fe8fb19SBen Gras * Convert double to unsigned integer (for gcc). 512fe8fb19SBen Gras * 522fe8fb19SBen Gras * I have made the output for NaN agree with the Sun compiler, not 532fe8fb19SBen Gras * that it really matters, by using `fbul,a'. 542fe8fb19SBen Gras */ 552fe8fb19SBen Gras 562fe8fb19SBen Gras 572fe8fb19SBen Gras .align 8 582fe8fb19SBen GrasLbig: 592fe8fb19SBen Gras .word 0x43e00000 ! .double 2^63 602fe8fb19SBen Gras .word 0 ! (who me, not trust the assembler?) 612fe8fb19SBen Gras 622fe8fb19SBen Gras/* 632fe8fb19SBen Gras * Same as above but to unsigned long 642fe8fb19SBen Gras */ 652fe8fb19SBen GrasENTRY(__dtoul) 662fe8fb19SBen Gras sub %sp, 16, %sp 672fe8fb19SBen Gras std %f2, [%sp + 64 + BIAS + 8] 68*84d9c625SLionel Sambuc#ifdef __PIC__ 692fe8fb19SBen Gras PICCY_SET(Lbig, %g1, %o0) 702fe8fb19SBen Gras ldd [%g1], %f2 712fe8fb19SBen Gras#else 722fe8fb19SBen Gras sethi %hi(Lbig), %g1 732fe8fb19SBen Gras ldd [%g1 + %lo(Lbig)], %f2 742fe8fb19SBen Gras#endif 752fe8fb19SBen Gras fcmped %f0, %f2 ! d < 2^63, or NaN, or -Inf? 762fe8fb19SBen Gras nop ! (fpop2 delay) 772fe8fb19SBen Gras fbul,a 1f ! if so, use fdtoi to convert to int 782fe8fb19SBen Gras fdtox %f0, %f0 ! (this includes negatives!) 792fe8fb19SBen Gras 802fe8fb19SBen Gras ! d does not fit in an int, so subtract 2^63, convert, 812fe8fb19SBen Gras ! and add 2^63 again (sigh). Just hope the intermediate 822fe8fb19SBen Gras ! fits (if not, the result is undefined anyway). 832fe8fb19SBen Gras 842fe8fb19SBen Gras fsubd %f0, %f2, %f0 ! d -= 2^63 852fe8fb19SBen Gras fdtox %f0, %f0 ! convert to int 862fe8fb19SBen Gras std %f0, [%sp + 64 + BIAS] ! move into return reg 872fe8fb19SBen Gras ldx [%sp + 64 + BIAS], %o0 882fe8fb19SBen Gras sethi %hi(0x80000000), %o1 892fe8fb19SBen Gras sllx %o1, 32, %o1 902fe8fb19SBen Gras add %o0, %o1, %o0 ! add 2^63 912fe8fb19SBen Gras ldd [%sp + 64 + BIAS + 8], %f2 922fe8fb19SBen Gras retl 932fe8fb19SBen Gras add %sp, 16, %sp 942fe8fb19SBen Gras 952fe8fb19SBen Gras1: 962fe8fb19SBen Gras std %f0, [%sp + 64 + BIAS] ! return result 972fe8fb19SBen Gras ldx [%sp + 64 + BIAS], %o0 982fe8fb19SBen Gras ldd [%sp + 64 + BIAS + 8], %f2 992fe8fb19SBen Gras retl 1002fe8fb19SBen Gras add %sp, 16, %sp 101