| 0,0 → 1,58 |
|---|
| /**************************************************************************** |
| * |
| * Open Watcom Project |
| * |
| * Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved. |
| * |
| * ======================================================================== |
| * |
| * This file contains Original Code and/or Modifications of Original |
| * Code as defined in and that are subject to the Sybase Open Watcom |
| * Public License version 1.0 (the 'License'). You may not use this file |
| * except in compliance with the License. BY USING THIS FILE YOU AGREE TO |
| * ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is |
| * provided with the Original Code and Modifications, and is also |
| * available at www.sybase.com/developer/opensource. |
| * |
| * The Original Code and all software distributed under the License are |
| * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| * EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM |
| * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR |
| * NON-INFRINGEMENT. Please see the License for the specific language |
| * governing rights and limitations under the License. |
| * |
| * ======================================================================== |
| * |
| * Description: verify Pentium processor divide bug |
| * |
| ****************************************************************************/ |
| |
| |
| #include "variety.h" |
| #include "rtinit.h" |
| #include "rtdata.h" |
| |
| extern unsigned _WCNEAR __chipbug; |
| |
| enum { |
| PROB_P5_DIV = 0x0001 |
| }; |
| |
| _WCRTLINK void __verify_pentium_fdiv_bug() |
| { |
| /* |
| Verify we have got the Pentium FDIV problem. |
| The volatiles are to scare the optimizer away. |
| */ |
| volatile double num = 4195835; |
| volatile double denom = 3145727; |
| |
| if( _RWD_real87 >= 3 ) { |
| if( (num - (num/denom)*denom) > 1.0e-8 ) { |
| __chipbug |= PROB_P5_DIV; |
| } |
| } |
| } |
| |
| AXI( __verify_pentium_fdiv_bug, INIT_PRIORITY_FPU + 4 ); |