1*4d12bfcdSjoerg/* $NetBSD: fixunsdfsi.S,v 1.6 2013/09/12 15:36:16 joerg Exp $ */ 21394f01bSchristos 30b9f5089Scgd/* 40b9f5089Scgd * Copyright (c) 1992, 1993 50b9f5089Scgd * The Regents of the University of California. All rights reserved. 60b9f5089Scgd * 70b9f5089Scgd * This software was developed by the Computer Systems Engineering group 80b9f5089Scgd * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 90b9f5089Scgd * contributed to Berkeley. 100b9f5089Scgd * 110b9f5089Scgd * Redistribution and use in source and binary forms, with or without 120b9f5089Scgd * modification, are permitted provided that the following conditions 130b9f5089Scgd * are met: 140b9f5089Scgd * 1. Redistributions of source code must retain the above copyright 150b9f5089Scgd * notice, this list of conditions and the following disclaimer. 160b9f5089Scgd * 2. Redistributions in binary form must reproduce the above copyright 170b9f5089Scgd * notice, this list of conditions and the following disclaimer in the 180b9f5089Scgd * documentation and/or other materials provided with the distribution. 19eb7c1594Sagc * 3. Neither the name of the University nor the names of its contributors 200b9f5089Scgd * may be used to endorse or promote products derived from this software 210b9f5089Scgd * without specific prior written permission. 220b9f5089Scgd * 230b9f5089Scgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 240b9f5089Scgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 250b9f5089Scgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 260b9f5089Scgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 270b9f5089Scgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 280b9f5089Scgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 290b9f5089Scgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 300b9f5089Scgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 310b9f5089Scgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 320b9f5089Scgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 330b9f5089Scgd * SUCH DAMAGE. 340b9f5089Scgd * 350b9f5089Scgd * from: Header: fixunsdfsi.s,v 1.3 91/10/08 00:03:15 torek Exp 360b9f5089Scgd */ 370b9f5089Scgd 381394f01bSchristos#include <machine/asm.h> 390b9f5089Scgd#if defined(LIBC_SCCS) && !defined(lint) 401394f01bSchristos#if 0 410b9f5089Scgd .asciz "@(#)fixunsdfsi.s 8.1 (Berkeley) 6/4/93" 421394f01bSchristos#else 43*4d12bfcdSjoerg RCSID("$NetBSD: fixunsdfsi.S,v 1.6 2013/09/12 15:36:16 joerg Exp $") 441394f01bSchristos#endif 450b9f5089Scgd#endif /* LIBC_SCCS and not lint */ 460b9f5089Scgd 470b9f5089Scgd/* 480b9f5089Scgd * Convert double to unsigned integer (for gcc). 490b9f5089Scgd * 500b9f5089Scgd * I have made the output for NaN agree with the Sun compiler, not 510b9f5089Scgd * that it really matters, by using `fbul,a'. 520b9f5089Scgd */ 530b9f5089Scgd 540b9f5089Scgd 550b9f5089Scgd .align 8 560b9f5089ScgdLbig: 570b9f5089Scgd .word 0x41e00000 ! .double 0r2147483648.0e+00 580b9f5089Scgd .word 0 ! (who me, not trust the assembler?) 590b9f5089Scgd 600b9f5089ScgdENTRY(__fixunsdfsi) 610b9f5089Scgd sub %sp, 8, %sp 620b9f5089Scgd std %o0, [%sp + 64] ! get argument into fpu reg 630b9f5089Scgd ldd [%sp + 64], %f0 64*4d12bfcdSjoerg#ifdef __PIC__ 65c060b81fSpk PICCY_SET(Lbig, %g1, %o0) 66c060b81fSpk ldd [%g1], %f2 67c060b81fSpk#else 680b9f5089Scgd sethi %hi(Lbig), %g1 690b9f5089Scgd ldd [%g1 + %lo(Lbig)], %f2 70c060b81fSpk#endif 710b9f5089Scgd fcmped %f0, %f2 ! d < 2^31, or NaN, or -Inf? 720b9f5089Scgd nop ! (fpop2 delay) 730b9f5089Scgd fbul,a 1f ! if so, use fdtoi to convert to int 740b9f5089Scgd fdtoi %f0, %f0 ! (this includes negatives!) 750b9f5089Scgd 760b9f5089Scgd ! d does not fit in an int, so subtract 2^31, convert, 770b9f5089Scgd ! and add 2^31 again (sigh). Just hope the intermediate 780b9f5089Scgd ! fits (if not, the result is undefined anyway). 790b9f5089Scgd 800b9f5089Scgd fsubd %f0, %f2, %f0 ! d -= 2^31 810b9f5089Scgd fdtoi %f0, %f0 ! convert to int 820b9f5089Scgd st %f0, [%sp + 64] ! move into return reg 830b9f5089Scgd ld [%sp + 64], %o0 840b9f5089Scgd sethi %hi(0x80000000), %o1 850b9f5089Scgd add %o0, %o1, %o0 ! add 2^31 860b9f5089Scgd retl 870b9f5089Scgd add %sp, 8, %sp 880b9f5089Scgd 890b9f5089Scgd1: 900b9f5089Scgd st %f0, [%sp + 64] ! return result 910b9f5089Scgd ld [%sp + 64], %o0 920b9f5089Scgd retl 930b9f5089Scgd add %sp, 8, %sp 94