/* Software floating-point emulation.
Copyright ( C ) 1997 , 1998 , 1999 Free Software Foundation , Inc .
This file is part of the GNU C Library .
Contributed by Richard Henderson ( rth @ cygnus . com ) ,
Jakub Jelinek ( jj @ ultra . linux . cz ) ,
David S . Miller ( davem @ redhat . com ) and
Peter Maydell ( pmaydell @ chiark . greenend . org . uk ) .
The GNU C Library is free software ; you can redistribute it and / or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation ; either version 2 of the
License , or ( at your option ) any later version .
The GNU C Library is distributed in the hope that it will be useful ,
but WITHOUT ANY WARRANTY ; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE . See the GNU
Library General Public License for more details .
You should have received a copy of the GNU Library General Public
License along with the GNU C Library ; see the file COPYING . LIB . If
not , write to the Free Software Foundation , Inc . ,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#ifndef __MATH_EMU_SOFT_FP_H__
#define __MATH_EMU_SOFT_FP_H__
#include <asm /sfp-machine.h>
/* Allow sfp-machine to have its own byte order definitions. */
#ifndef __BYTE_ORDER
#include <endian.h>
#endif
#define _FP_WORKBITS 3
#define _FP_WORK_LSB ((_FP_W_TYPE)1 << 3 )
#define _FP_WORK_ROUND ((_FP_W_TYPE)1 << 2 )
#define _FP_WORK_GUARD ((_FP_W_TYPE)1 << 1 )
#define _FP_WORK_STICKY ((_FP_W_TYPE)1 << 0 )
#ifndef FP_RND_NEAREST
# define FP_RND_NEAREST 0
# define FP_RND_ZERO 1
# define FP_RND_PINF 2
# define FP_RND_MINF 3
#ifndef FP_ROUNDMODE
# define FP_ROUNDMODE FP_RND_NEAREST
#endif
#endif
/* By default don't care about exceptions. */
#ifndef FP_EX_INVALID
#define FP_EX_INVALID 0
#endif
#ifndef FP_EX_INVALID_SNAN
#define FP_EX_INVALID_SNAN 0
#endif
/* inf - inf */
#ifndef FP_EX_INVALID_ISI
#define FP_EX_INVALID_ISI 0
#endif
/* inf / inf */
#ifndef FP_EX_INVALID_IDI
#define FP_EX_INVALID_IDI 0
#endif
/* 0 / 0 */
#ifndef FP_EX_INVALID_ZDZ
#define FP_EX_INVALID_ZDZ 0
#endif
/* inf * 0 */
#ifndef FP_EX_INVALID_IMZ
#define FP_EX_INVALID_IMZ 0
#endif
#ifndef FP_EX_OVERFLOW
#define FP_EX_OVERFLOW 0
#endif
#ifndef FP_EX_UNDERFLOW
#define FP_EX_UNDERFLOW
#endif
#ifndef FP_EX_DIVZERO
#define FP_EX_DIVZERO 0
#endif
#ifndef FP_EX_INEXACT
#define FP_EX_INEXACT 0
#endif
#ifndef FP_EX_DENORM
#define FP_EX_DENORM 0
#endif
#ifdef _FP_DECL_EX
#define FP_DECL_EX \
int _fex = 0 ; \
_FP_DECL_EX
#else
#define FP_DECL_EX int _fex = 0
#endif
#ifndef FP_INIT_ROUNDMODE
#define FP_INIT_ROUNDMODE do {} while (0 )
#endif
#ifndef FP_HANDLE_EXCEPTIONS
#define FP_HANDLE_EXCEPTIONS do {} while (0 )
#endif
/* By default we never flush denormal input operands to signed zero. */
#ifndef FP_DENORM_ZERO
#define FP_DENORM_ZERO 0
#endif
#ifndef FP_INHIBIT_RESULTS
/* By default we write the results always.
* sfp - machine may override this and e . g .
* check if some exceptions are unmasked
* and inhibit it in such a case .
*/
#define FP_INHIBIT_RESULTS 0
#endif
#ifndef FP_TRAPPING_EXCEPTIONS
#define FP_TRAPPING_EXCEPTIONS 0
#endif
#define FP_SET_EXCEPTION(ex) \
_fex |= (ex)
#define FP_UNSET_EXCEPTION(ex) \
_fex &= ~(ex)
#define FP_CUR_EXCEPTIONS \
(_fex)
#define FP_CLEAR_EXCEPTIONS \
_fex = 0
#define _FP_ROUND_NEAREST(wc, X) \
do { \
if ((_FP_FRAC_LOW_## wc(X) & 15 ) != _FP_WORK_ROUND) \
_FP_FRAC_ADDI_## wc(X, _FP_WORK_ROUND); \
} while (0 )
#define _FP_ROUND_ZERO(wc, X) (void )0
#define _FP_ROUND_PINF(wc, X) \
do { \
if (!X## _s && (_FP_FRAC_LOW_## wc(X) & 7 )) \
_FP_FRAC_ADDI_## wc(X, _FP_WORK_LSB); \
} while (0 )
#define _FP_ROUND_MINF(wc, X) \
do { \
if (X## _s && (_FP_FRAC_LOW_## wc(X) & 7 )) \
_FP_FRAC_ADDI_## wc(X, _FP_WORK_LSB); \
} while (0 )
#define _FP_ROUND(wc, X) \
do { \
if (_FP_FRAC_LOW_## wc(X) & 7 ) \
FP_SET_EXCEPTION(FP_EX_INEXACT); \
switch (FP_ROUNDMODE) \
{ \
case FP_RND_NEAREST: \
_FP_ROUND_NEAREST(wc,X); \
break ; \
case FP_RND_ZERO: \
_FP_ROUND_ZERO(wc,X); \
break ; \
case FP_RND_PINF: \
_FP_ROUND_PINF(wc,X); \
break ; \
case FP_RND_MINF: \
_FP_ROUND_MINF(wc,X); \
break ; \
} \
} while (0 )
#define FP_CLS_NORMAL 0
#define FP_CLS_ZERO 1
#define FP_CLS_INF 2
#define FP_CLS_NAN 3
#define _FP_CLS_COMBINE(x,y) (((x) << 2 ) | (y))
#include <math-emu/op-1 .h>
#include <math-emu/op-2 .h>
#include <math-emu/op-4 .h>
#include <math-emu/op-8 .h>
#include <math-emu/op-common.h>
/* Sigh. Silly things longlong.h needs. */
#define UWtype _FP_W_TYPE
#define W_TYPE_SIZE _FP_W_TYPE_SIZE
typedef int SItype __attribute__((mode(SI)));
typedef int DItype __attribute__((mode(DI)));
typedef unsigned int USItype __attribute__((mode(SI)));
typedef unsigned int UDItype __attribute__((mode(DI)));
#if _FP_W_TYPE_SIZE == 32
typedef unsigned int UHWtype __attribute__((mode(HI)));
#elif _FP_W_TYPE_SIZE == 64
typedef USItype UHWtype;
#endif
#ifndef umul_ppmm
#include <stdlib/longlong.h>
#endif
#endif /* __MATH_EMU_SOFT_FP_H__ */
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