fixunsdfsi.S revision 1.1
1 1.1 cgd /*- 2 1.1 cgd * Copyright (c) 1990 The Regents of the University of California. 3 1.1 cgd * All rights reserved. 4 1.1 cgd * 5 1.1 cgd * This code is derived from software contributed to Berkeley by 6 1.1 cgd * William Jolitz. 7 1.1 cgd * 8 1.1 cgd * Redistribution and use in source and binary forms, with or without 9 1.1 cgd * modification, are permitted provided that the following conditions 10 1.1 cgd * are met: 11 1.1 cgd * 1. Redistributions of source code must retain the above copyright 12 1.1 cgd * notice, this list of conditions and the following disclaimer. 13 1.1 cgd * 2. Redistributions in binary form must reproduce the above copyright 14 1.1 cgd * notice, this list of conditions and the following disclaimer in the 15 1.1 cgd * documentation and/or other materials provided with the distribution. 16 1.1 cgd * 3. All advertising materials mentioning features or use of this software 17 1.1 cgd * must display the following acknowledgement: 18 1.1 cgd * This product includes software developed by the University of 19 1.1 cgd * California, Berkeley and its contributors. 20 1.1 cgd * 4. Neither the name of the University nor the names of its contributors 21 1.1 cgd * may be used to endorse or promote products derived from this software 22 1.1 cgd * without specific prior written permission. 23 1.1 cgd * 24 1.1 cgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 1.1 cgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 1.1 cgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 1.1 cgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 1.1 cgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 1.1 cgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 1.1 cgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 1.1 cgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 1.1 cgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 1.1 cgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 1.1 cgd * SUCH DAMAGE. 35 1.1 cgd */ 36 1.1 cgd 37 1.1 cgd #include "SYS.h" 38 1.1 cgd 39 1.1 cgd #if defined(LIBC_SCCS) && !defined(lint) 40 1.1 cgd .text 41 1.1 cgd /*.asciz "from: @(#)fixunsdfsi.s 5.1 12/17/90"*/ 42 1.1 cgd .asciz "$Id: fixunsdfsi.S,v 1.1 1993/10/07 00:19:03 cgd Exp $" 43 1.1 cgd #endif /* LIBC_SCCS and not lint */ 44 1.1 cgd 45 1.1 cgd .globl ___fixunsdfsi 46 1.1 cgd ___fixunsdfsi: 47 1.1 cgd fldl 4(%esp) /* argument double to accum stack */ 48 1.1 cgd frndint /* create integer */ 49 1.1 cgd #ifdef PIC 50 1.1 cgd PIC_PROLOGUE 51 1.1 cgd leal PIC_GOTOFF(fbiggestsigned),%eax 52 1.1 cgd PIC_EPILOGUE 53 1.1 cgd fcoml (%eax) 54 1.1 cgd #else 55 1.1 cgd fcoml PIC_GOTOFF(fbiggestsigned) /* bigger than biggest signed? */ 56 1.1 cgd #endif 57 1.1 cgd fstsw %ax 58 1.1 cgd sahf 59 1.1 cgd jnb 1f 60 1.1 cgd 61 1.1 cgd fistpl 4(%esp) 62 1.1 cgd movl 4(%esp),%eax 63 1.1 cgd ret 64 1.1 cgd 65 1.1 cgd 1: 66 1.1 cgd #ifdef PIC 67 1.1 cgd PIC_PROLOGUE 68 1.1 cgd leal PIC_GOTOFF(fbiggestsigned),%eax 69 1.1 cgd PIC_EPILOGUE 70 1.1 cgd fsubl (%eax) 71 1.1 cgd #else 72 1.1 cgd fsubl PIC_GOTOFF(fbiggestsigned) /* reduce for proper conversion */ 73 1.1 cgd #endif 74 1.1 cgd fistpl 4(%esp) /* convert */ 75 1.1 cgd movl 4(%esp),%eax 76 1.1 cgd orl $0x80000000,%eax /* restore bias */ 77 1.1 cgd PIC_EPILOGUE 78 1.1 cgd ret 79 1.1 cgd 80 1.1 cgd fbiggestsigned: .double 0r2147483648.0 81
Indexes created Fri Sep 26 20:09:58 GMT 2025