fixunsdfsi.S revision 1.13
1 /* $NetBSD: fixunsdfsi.S,v 1.13 2013/09/12 15:36:15 joerg Exp $ */ 2 3 /*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * from: @(#)fixunsdfsi.s 5.1 12/17/90 35 */ 36 37 #include <machine/asm.h> 38 #if defined(LIBC_SCCS) 39 RCSID("$NetBSD: fixunsdfsi.S,v 1.13 2013/09/12 15:36:15 joerg Exp $") 40 #endif 41 42 ENTRY(__fixunsdfsi) 43 fldl 4(%esp) /* argument double to accum stack */ 44 frndint /* create integer */ 45 #ifdef __PIC__ 46 PIC_PROLOGUE 47 leal PIC_GOTOFF(fbiggestsigned),%eax 48 PIC_EPILOGUE 49 fcoml (%eax) 50 #else 51 fcoml fbiggestsigned /* bigger than biggest signed? */ 52 #endif 53 fstsw %ax 54 sahf 55 jnb 2f 56 57 fistpl 4(%esp) 58 movl 4(%esp),%eax 59 ret 60 61 2: 62 #ifdef __PIC__ 63 PIC_PROLOGUE 64 leal PIC_GOTOFF(fbiggestsigned),%eax 65 PIC_EPILOGUE 66 fsubl (%eax) 67 #else 68 fsubl fbiggestsigned /* reduce for proper conversion */ 69 #endif 70 fistpl 4(%esp) /* convert */ 71 movl 4(%esp),%eax 72 orl $0x80000000,%eax /* restore bias */ 73 ret 74 75 fbiggestsigned: .double 2147483648.0 76
Indexes created Fri Sep 26 20:09:58 GMT 2025