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Annotation of qemu/roms/openbios/libgcc/__negti2.c, revision 1.1

1.1     ! root        1: /* Extracted from gcc-3.4.1/gcc/config/mips/_tilibi.c */
        !             2: /* A few TImode functions needed for TFmode emulated arithmetic.
        !             3:    Copyright 2002, 2003 Free Software Foundation, Inc.
        !             4:    Contributed by Alexandre Oliva <[email protected]>
        !             5: 
        !             6: This file is part of GCC.
        !             7: 
        !             8: GCC is free software; you can redistribute it and/or modify
        !             9: it under the terms of the GNU General Public License as published by
        !            10: the Free Software Foundation; either version 2, or (at your option)
        !            11: any later version.
        !            12: 
        !            13: GCC is distributed in the hope that it will be useful,
        !            14: but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            15: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            16: GNU General Public License for more details.
        !            17: 
        !            18: You should have received a copy of the GNU General Public License
        !            19: along with GCC; see the file COPYING.  If not, write to
        !            20: the Free Software Foundation, 59 Temple Place - Suite 330,
        !            21: Boston, MA 02111-1307, USA.  */
        !            22: 
        !            23: #include "libgcc.h"
        !            24: 
        !            25: #if defined(__sparc__) || defined(__ppc__)
        !            26: #define LIBGCC2_WORDS_BIG_ENDIAN
        !            27: #endif
        !            28: 
        !            29: typedef union
        !            30: {
        !            31:   struct TIstruct {
        !            32: #if defined(LIBGCC2_WORDS_BIG_ENDIAN)
        !            33:     DItype high, low;
        !            34: #else
        !            35:     DItype low, high;
        !            36: #endif
        !            37:   } s;
        !            38:   TItype ll;
        !            39: } TIunion;
        !            40: 
        !            41: TItype
        !            42: __negti2 (TItype u)
        !            43: {
        !            44:   TIunion w;
        !            45:   TIunion uu;
        !            46: 
        !            47:   uu.ll = u;
        !            48: 
        !            49:   w.s.low = -uu.s.low;
        !            50:   w.s.high = -uu.s.high - ((UDItype) w.s.low > 0);
        !            51: 
        !            52:   return w.ll;
        !            53: }

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