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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [config/] [soft-fp/] [soft-fp.h] - Blame information for rev 282

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1 282 jeremybenn
/* Software floating-point emulation.
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   Copyright (C) 1997,1998,1999,2000,2002,2003,2005,2006
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        Free Software Foundation, Inc.
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   This file is part of the GNU C Library.
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   Contributed by Richard Henderson (rth@cygnus.com),
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                  Jakub Jelinek (jj@ultra.linux.cz),
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                  David S. Miller (davem@redhat.com) and
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                  Peter Maydell (pmaydell@chiark.greenend.org.uk).
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   The GNU C Library is free software; you can redistribute it and/or
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   modify it under the terms of the GNU Lesser General Public
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   License as published by the Free Software Foundation; either
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   version 2.1 of the License, or (at your option) any later version.
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   In addition to the permissions in the GNU Lesser General Public
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   License, the Free Software Foundation gives you unlimited
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   permission to link the compiled version of this file into
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   combinations with other programs, and to distribute those
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   combinations without any restriction coming from the use of this
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   file.  (The Lesser General Public License restrictions do apply in
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   other respects; for example, they cover modification of the file,
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   and distribution when not linked into a combine executable.)
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   The GNU C Library is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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   Lesser General Public License for more details.
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   You should have received a copy of the GNU Lesser General Public
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   License along with the GNU C Library; if not, write to the Free
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   Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
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   MA 02110-1301, USA.  */
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#ifndef SOFT_FP_H
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#define SOFT_FP_H
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#ifdef _LIBC
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#include <sfp-machine.h>
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#else
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#include "sfp-machine.h"
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#endif
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/* Allow sfp-machine to have its own byte order definitions. */
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#ifndef __BYTE_ORDER
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#ifdef _LIBC
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#include <endian.h>
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#else
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#error "endianness not defined by sfp-machine.h"
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#endif
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#endif
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#define _FP_WORKBITS            3
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#define _FP_WORK_LSB            ((_FP_W_TYPE)1 << 3)
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#define _FP_WORK_ROUND          ((_FP_W_TYPE)1 << 2)
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#define _FP_WORK_GUARD          ((_FP_W_TYPE)1 << 1)
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#define _FP_WORK_STICKY         ((_FP_W_TYPE)1 << 0)
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#ifndef FP_RND_NEAREST
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# define FP_RND_NEAREST         0
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# define FP_RND_ZERO            1
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# define FP_RND_PINF            2
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# define FP_RND_MINF            3
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#endif
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#ifndef FP_ROUNDMODE
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# define FP_ROUNDMODE           FP_RND_NEAREST
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#endif
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/* By default don't care about exceptions. */
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#ifndef FP_EX_INVALID
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#define FP_EX_INVALID           0
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#endif
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#ifndef FP_EX_OVERFLOW
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#define FP_EX_OVERFLOW          0
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#endif
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#ifndef FP_EX_UNDERFLOW
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#define FP_EX_UNDERFLOW         0
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#endif
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#ifndef FP_EX_DIVZERO
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#define FP_EX_DIVZERO           0
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#endif
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#ifndef FP_EX_INEXACT
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#define FP_EX_INEXACT           0
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#endif
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#ifndef FP_EX_DENORM
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#define FP_EX_DENORM            0
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#endif
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#ifdef _FP_DECL_EX
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#define FP_DECL_EX                                      \
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  int _fex = 0;                                          \
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  _FP_DECL_EX
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#else
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#define FP_DECL_EX int _fex = 0
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#endif
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#ifndef FP_INIT_ROUNDMODE
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#define FP_INIT_ROUNDMODE do {} while (0)
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#endif
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#ifndef FP_HANDLE_EXCEPTIONS
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#define FP_HANDLE_EXCEPTIONS do {} while (0)
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#endif
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#ifndef FP_INHIBIT_RESULTS
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/* By default we write the results always.
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 * sfp-machine may override this and e.g.
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 * check if some exceptions are unmasked
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 * and inhibit it in such a case.
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 */
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#define FP_INHIBIT_RESULTS 0
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#endif
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#define FP_SET_EXCEPTION(ex)                            \
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  _fex |= (ex)
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#define FP_UNSET_EXCEPTION(ex)                          \
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  _fex &= ~(ex)
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#define FP_CLEAR_EXCEPTIONS                             \
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  _fex = 0
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#define _FP_ROUND_NEAREST(wc, X)                        \
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do {                                                    \
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    if ((_FP_FRAC_LOW_##wc(X) & 15) != _FP_WORK_ROUND)  \
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      _FP_FRAC_ADDI_##wc(X, _FP_WORK_ROUND);            \
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} while (0)
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#define _FP_ROUND_ZERO(wc, X)           (void)0
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#define _FP_ROUND_PINF(wc, X)                           \
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do {                                                    \
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    if (!X##_s && (_FP_FRAC_LOW_##wc(X) & 7))           \
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      _FP_FRAC_ADDI_##wc(X, _FP_WORK_LSB);              \
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} while (0)
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#define _FP_ROUND_MINF(wc, X)                           \
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do {                                                    \
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    if (X##_s && (_FP_FRAC_LOW_##wc(X) & 7))            \
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      _FP_FRAC_ADDI_##wc(X, _FP_WORK_LSB);              \
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} while (0)
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#define _FP_ROUND(wc, X)                        \
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do {                                            \
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        if (_FP_FRAC_LOW_##wc(X) & 7)           \
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          FP_SET_EXCEPTION(FP_EX_INEXACT);      \
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        switch (FP_ROUNDMODE)                   \
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        {                                       \
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          case FP_RND_NEAREST:                  \
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            _FP_ROUND_NEAREST(wc,X);            \
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            break;                              \
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          case FP_RND_ZERO:                     \
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            _FP_ROUND_ZERO(wc,X);               \
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            break;                              \
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          case FP_RND_PINF:                     \
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            _FP_ROUND_PINF(wc,X);               \
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            break;                              \
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          case FP_RND_MINF:                     \
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            _FP_ROUND_MINF(wc,X);               \
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            break;                              \
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        }                                       \
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} while (0)
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#define FP_CLS_NORMAL           0
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#define FP_CLS_ZERO             1
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#define FP_CLS_INF              2
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#define FP_CLS_NAN              3
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#define _FP_CLS_COMBINE(x,y)    (((x) << 2) | (y))
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#include "op-1.h"
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#include "op-2.h"
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#include "op-4.h"
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#include "op-8.h"
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#include "op-common.h"
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/* Sigh.  Silly things longlong.h needs.  */
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#define UWtype          _FP_W_TYPE
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#define W_TYPE_SIZE     _FP_W_TYPE_SIZE
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typedef int QItype __attribute__((mode(QI)));
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typedef int SItype __attribute__((mode(SI)));
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typedef int DItype __attribute__((mode(DI)));
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typedef unsigned int UQItype __attribute__((mode(QI)));
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typedef unsigned int USItype __attribute__((mode(SI)));
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typedef unsigned int UDItype __attribute__((mode(DI)));
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#if _FP_W_TYPE_SIZE == 32
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typedef unsigned int UHWtype __attribute__((mode(HI)));
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#elif _FP_W_TYPE_SIZE == 64
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typedef USItype UHWtype;
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#endif
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#ifndef CMPtype
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#define CMPtype         int
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#endif
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#define SI_BITS         (__CHAR_BIT__ * (int)sizeof(SItype))
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#define DI_BITS         (__CHAR_BIT__ * (int)sizeof(DItype))
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#ifndef umul_ppmm
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#ifdef _LIBC
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#include <stdlib/longlong.h>
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#else
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#include "longlong.h"
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#endif
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#endif
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#ifdef _LIBC
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#include <stdlib.h>
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#else
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extern void abort (void);
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#endif
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#endif

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