include/math-emu/double.h - arm/linux-arm64-legacy - Git at Google

 /* Software floating-point emulation.
    Definitions for IEEE Double Precision
    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_DOUBLE_H__
 #define    __MATH_EMU_DOUBLE_H__

 #if _FP_W_TYPE_SIZE < 32
 #error "Here's a nickel kid.  Go buy yourself a real computer."
 #endif

 #if _FP_W_TYPE_SIZE < 64
 #define _FP_FRACTBITS_D		(2 * _FP_W_TYPE_SIZE)
 #else
 #define _FP_FRACTBITS_D		_FP_W_TYPE_SIZE
 #endif

 #define _FP_FRACBITS_D		53
 #define _FP_FRACXBITS_D		(_FP_FRACTBITS_D - _FP_FRACBITS_D)
 #define _FP_WFRACBITS_D		(_FP_WORKBITS + _FP_FRACBITS_D)
 #define _FP_WFRACXBITS_D	(_FP_FRACTBITS_D - _FP_WFRACBITS_D)
 #define _FP_EXPBITS_D		11
 #define _FP_EXPBIAS_D		1023
 #define _FP_EXPMAX_D		2047

 #define _FP_QNANBIT_D		\
 	((_FP_W_TYPE)1 << (_FP_FRACBITS_D-2) % _FP_W_TYPE_SIZE)
 #define _FP_IMPLBIT_D		\
 	((_FP_W_TYPE)1 << (_FP_FRACBITS_D-1) % _FP_W_TYPE_SIZE)
 #define _FP_OVERFLOW_D		\
 	((_FP_W_TYPE)1 << _FP_WFRACBITS_D % _FP_W_TYPE_SIZE)

 #if _FP_W_TYPE_SIZE < 64

 union _FP_UNION_D
 {
   double flt;
   struct {
 #if __BYTE_ORDER == __BIG_ENDIAN
     unsigned sign  : 1;
     unsigned exp   : _FP_EXPBITS_D;
     unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;
     unsigned frac0 : _FP_W_TYPE_SIZE;
 #else
     unsigned frac0 : _FP_W_TYPE_SIZE;
     unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;
     unsigned exp   : _FP_EXPBITS_D;
     unsigned sign  : 1;
 #endif
   } bits __attribute__((packed));
 };

 #define FP_DECL_D(X)		_FP_DECL(2,X)
 #define FP_UNPACK_RAW_D(X,val)	_FP_UNPACK_RAW_2(D,X,val)
 #define FP_UNPACK_RAW_DP(X,val)	_FP_UNPACK_RAW_2_P(D,X,val)
 #define FP_PACK_RAW_D(val,X)	_FP_PACK_RAW_2(D,val,X)
 #define FP_PACK_RAW_DP(val,X)		\
   do {					\
     if (!FP_INHIBIT_RESULTS)		\
       _FP_PACK_RAW_2_P(D,val,X);	\
   } while (0)

 #define FP_UNPACK_D(X,val)		\
   do {					\
     _FP_UNPACK_RAW_2(D,X,val);		\
     _FP_UNPACK_CANONICAL(D,2,X);	\
   } while (0)

 #define FP_UNPACK_DP(X,val)		\
   do {					\
     _FP_UNPACK_RAW_2_P(D,X,val);	\
     _FP_UNPACK_CANONICAL(D,2,X);	\
   } while (0)

 #define FP_PACK_D(val,X)		\
   do {					\
     _FP_PACK_CANONICAL(D,2,X);		\
     _FP_PACK_RAW_2(D,val,X);		\
   } while (0)

 #define FP_PACK_DP(val,X)		\
   do {					\
     _FP_PACK_CANONICAL(D,2,X);		\
     if (!FP_INHIBIT_RESULTS)		\
       _FP_PACK_RAW_2_P(D,val,X);	\
   } while (0)

 #define FP_ISSIGNAN_D(X)		_FP_ISSIGNAN(D,2,X)
 #define FP_NEG_D(R,X)			_FP_NEG(D,2,R,X)
 #define FP_ADD_D(R,X,Y)			_FP_ADD(D,2,R,X,Y)
 #define FP_SUB_D(R,X,Y)			_FP_SUB(D,2,R,X,Y)
 #define FP_MUL_D(R,X,Y)			_FP_MUL(D,2,R,X,Y)
 #define FP_DIV_D(R,X,Y)			_FP_DIV(D,2,R,X,Y)
 #define FP_SQRT_D(R,X)			_FP_SQRT(D,2,R,X)
 #define _FP_SQRT_MEAT_D(R,S,T,X,Q)	_FP_SQRT_MEAT_2(R,S,T,X,Q)

 #define FP_CMP_D(r,X,Y,un)	_FP_CMP(D,2,r,X,Y,un)
 #define FP_CMP_EQ_D(r,X,Y)	_FP_CMP_EQ(D,2,r,X,Y)

 #define FP_TO_INT_D(r,X,rsz,rsg)	_FP_TO_INT(D,2,r,X,rsz,rsg)
 #define FP_TO_INT_ROUND_D(r,X,rsz,rsg)	_FP_TO_INT_ROUND(D,2,r,X,rsz,rsg)
 #define FP_FROM_INT_D(X,r,rs,rt)	_FP_FROM_INT(D,2,X,r,rs,rt)

 #define _FP_FRAC_HIGH_D(X)	_FP_FRAC_HIGH_2(X)
 #define _FP_FRAC_HIGH_RAW_D(X)	_FP_FRAC_HIGH_2(X)

 #else

 union _FP_UNION_D
 {
   double flt;
   struct {
 #if __BYTE_ORDER == __BIG_ENDIAN
     unsigned sign : 1;
     unsigned exp  : _FP_EXPBITS_D;
     unsigned long frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0);
 #else
     unsigned long frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0);
     unsigned exp  : _FP_EXPBITS_D;
     unsigned sign : 1;
 #endif
   } bits __attribute__((packed));
 };

 #define FP_DECL_D(X)		_FP_DECL(1,X)
 #define FP_UNPACK_RAW_D(X,val)	_FP_UNPACK_RAW_1(D,X,val)
 #define FP_UNPACK_RAW_DP(X,val)	_FP_UNPACK_RAW_1_P(D,X,val)
 #define FP_PACK_RAW_D(val,X)	_FP_PACK_RAW_1(D,val,X)
 #define FP_PACK_RAW_DP(val,X)		\
   do {					\
     if (!FP_INHIBIT_RESULTS)		\
       _FP_PACK_RAW_1_P(D,val,X);	\
   } while (0)

 #define FP_UNPACK_D(X,val)		\
   do {					\
     _FP_UNPACK_RAW_1(D,X,val);		\
     _FP_UNPACK_CANONICAL(D,1,X);	\
   } while (0)

 #define FP_UNPACK_DP(X,val)		\
   do {					\
     _FP_UNPACK_RAW_1_P(D,X,val);	\
     _FP_UNPACK_CANONICAL(D,1,X);	\
   } while (0)

 #define FP_PACK_D(val,X)		\
   do {					\
     _FP_PACK_CANONICAL(D,1,X);		\
     _FP_PACK_RAW_1(D,val,X);		\
   } while (0)

 #define FP_PACK_DP(val,X)		\
   do {					\
     _FP_PACK_CANONICAL(D,1,X);		\
     if (!FP_INHIBIT_RESULTS)		\
       _FP_PACK_RAW_1_P(D,val,X);	\
   } while (0)

 #define FP_ISSIGNAN_D(X)		_FP_ISSIGNAN(D,1,X)
 #define FP_NEG_D(R,X)			_FP_NEG(D,1,R,X)
 #define FP_ADD_D(R,X,Y)			_FP_ADD(D,1,R,X,Y)
 #define FP_SUB_D(R,X,Y)			_FP_SUB(D,1,R,X,Y)
 #define FP_MUL_D(R,X,Y)			_FP_MUL(D,1,R,X,Y)
 #define FP_DIV_D(R,X,Y)			_FP_DIV(D,1,R,X,Y)
 #define FP_SQRT_D(R,X)			_FP_SQRT(D,1,R,X)
 #define _FP_SQRT_MEAT_D(R,S,T,X,Q)	_FP_SQRT_MEAT_1(R,S,T,X,Q)

 /* The implementation of _FP_MUL_D and _FP_DIV_D should be chosen by
    the target machine.  */

 #define FP_CMP_D(r,X,Y,un)	_FP_CMP(D,1,r,X,Y,un)
 #define FP_CMP_EQ_D(r,X,Y)	_FP_CMP_EQ(D,1,r,X,Y)

 #define FP_TO_INT_D(r,X,rsz,rsg)	_FP_TO_INT(D,1,r,X,rsz,rsg)
 #define FP_TO_INT_ROUND_D(r,X,rsz,rsg)	_FP_TO_INT_ROUND(D,1,r,X,rsz,rsg)
 #define FP_FROM_INT_D(X,r,rs,rt)	_FP_FROM_INT(D,1,X,r,rs,rt)

 #define _FP_FRAC_HIGH_D(X)	_FP_FRAC_HIGH_1(X)
 #define _FP_FRAC_HIGH_RAW_D(X)	_FP_FRAC_HIGH_1(X)

 #endif /* W_TYPE_SIZE < 64 */


 #endif /* __MATH_EMU_DOUBLE_H__ */
	/* Software floating-point emulation.
	Definitions for IEEE Double Precision
	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_DOUBLE_H__
	#define __MATH_EMU_DOUBLE_H__

	#if _FP_W_TYPE_SIZE < 32
	#error "Here's a nickel kid. Go buy yourself a real computer."
	#endif

	#if _FP_W_TYPE_SIZE < 64
	#define _FP_FRACTBITS_D (2 * _FP_W_TYPE_SIZE)
	#else
	#define _FP_FRACTBITS_D _FP_W_TYPE_SIZE
	#endif

	#define _FP_FRACBITS_D 53
	#define _FP_FRACXBITS_D (_FP_FRACTBITS_D - _FP_FRACBITS_D)
	#define _FP_WFRACBITS_D (_FP_WORKBITS + _FP_FRACBITS_D)
	#define _FP_WFRACXBITS_D (_FP_FRACTBITS_D - _FP_WFRACBITS_D)
	#define _FP_EXPBITS_D 11
	#define _FP_EXPBIAS_D 1023
	#define _FP_EXPMAX_D 2047

	#define _FP_QNANBIT_D \
	((_FP_W_TYPE)1 << (_FP_FRACBITS_D-2) % _FP_W_TYPE_SIZE)
	#define _FP_IMPLBIT_D \
	((_FP_W_TYPE)1 << (_FP_FRACBITS_D-1) % _FP_W_TYPE_SIZE)
	#define _FP_OVERFLOW_D \
	((_FP_W_TYPE)1 << _FP_WFRACBITS_D % _FP_W_TYPE_SIZE)

	#if _FP_W_TYPE_SIZE < 64

	union _FP_UNION_D
	{
	double flt;
	struct {
	#if __BYTE_ORDER == __BIG_ENDIAN
	unsigned sign : 1;
	unsigned exp : _FP_EXPBITS_D;
	unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;
	unsigned frac0 : _FP_W_TYPE_SIZE;
	#else
	unsigned frac0 : _FP_W_TYPE_SIZE;
	unsigned frac1 : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0) - _FP_W_TYPE_SIZE;
	unsigned exp : _FP_EXPBITS_D;
	unsigned sign : 1;
	#endif
	} bits __attribute__((packed));
	};

	#define FP_DECL_D(X) _FP_DECL(2,X)
	#define FP_UNPACK_RAW_D(X,val) _FP_UNPACK_RAW_2(D,X,val)
	#define FP_UNPACK_RAW_DP(X,val) _FP_UNPACK_RAW_2_P(D,X,val)
	#define FP_PACK_RAW_D(val,X) _FP_PACK_RAW_2(D,val,X)
	#define FP_PACK_RAW_DP(val,X) \
	do { \
	if (!FP_INHIBIT_RESULTS) \
	_FP_PACK_RAW_2_P(D,val,X); \
	} while (0)

	#define FP_UNPACK_D(X,val) \
	do { \
	_FP_UNPACK_RAW_2(D,X,val); \
	_FP_UNPACK_CANONICAL(D,2,X); \
	} while (0)

	#define FP_UNPACK_DP(X,val) \
	do { \
	_FP_UNPACK_RAW_2_P(D,X,val); \
	_FP_UNPACK_CANONICAL(D,2,X); \
	} while (0)

	#define FP_PACK_D(val,X) \
	do { \
	_FP_PACK_CANONICAL(D,2,X); \
	_FP_PACK_RAW_2(D,val,X); \
	} while (0)

	#define FP_PACK_DP(val,X) \
	do { \
	_FP_PACK_CANONICAL(D,2,X); \
	if (!FP_INHIBIT_RESULTS) \
	_FP_PACK_RAW_2_P(D,val,X); \
	} while (0)

	#define FP_ISSIGNAN_D(X) _FP_ISSIGNAN(D,2,X)
	#define FP_NEG_D(R,X) _FP_NEG(D,2,R,X)
	#define FP_ADD_D(R,X,Y) _FP_ADD(D,2,R,X,Y)
	#define FP_SUB_D(R,X,Y) _FP_SUB(D,2,R,X,Y)
	#define FP_MUL_D(R,X,Y) _FP_MUL(D,2,R,X,Y)
	#define FP_DIV_D(R,X,Y) _FP_DIV(D,2,R,X,Y)
	#define FP_SQRT_D(R,X) _FP_SQRT(D,2,R,X)
	#define _FP_SQRT_MEAT_D(R,S,T,X,Q) _FP_SQRT_MEAT_2(R,S,T,X,Q)

	#define FP_CMP_D(r,X,Y,un) _FP_CMP(D,2,r,X,Y,un)
	#define FP_CMP_EQ_D(r,X,Y) _FP_CMP_EQ(D,2,r,X,Y)

	#define FP_TO_INT_D(r,X,rsz,rsg) _FP_TO_INT(D,2,r,X,rsz,rsg)
	#define FP_TO_INT_ROUND_D(r,X,rsz,rsg) _FP_TO_INT_ROUND(D,2,r,X,rsz,rsg)
	#define FP_FROM_INT_D(X,r,rs,rt) _FP_FROM_INT(D,2,X,r,rs,rt)

	#define _FP_FRAC_HIGH_D(X) _FP_FRAC_HIGH_2(X)
	#define _FP_FRAC_HIGH_RAW_D(X) _FP_FRAC_HIGH_2(X)

	#else

	union _FP_UNION_D
	{
	double flt;
	struct {
	#if __BYTE_ORDER == __BIG_ENDIAN
	unsigned sign : 1;
	unsigned exp : _FP_EXPBITS_D;
	unsigned long frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0);
	#else
	unsigned long frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0);
	unsigned exp : _FP_EXPBITS_D;
	unsigned sign : 1;
	#endif
	} bits __attribute__((packed));
	};

	#define FP_DECL_D(X) _FP_DECL(1,X)
	#define FP_UNPACK_RAW_D(X,val) _FP_UNPACK_RAW_1(D,X,val)
	#define FP_UNPACK_RAW_DP(X,val) _FP_UNPACK_RAW_1_P(D,X,val)
	#define FP_PACK_RAW_D(val,X) _FP_PACK_RAW_1(D,val,X)
	#define FP_PACK_RAW_DP(val,X) \
	do { \
	if (!FP_INHIBIT_RESULTS) \
	_FP_PACK_RAW_1_P(D,val,X); \
	} while (0)

	#define FP_UNPACK_D(X,val) \
	do { \
	_FP_UNPACK_RAW_1(D,X,val); \
	_FP_UNPACK_CANONICAL(D,1,X); \
	} while (0)

	#define FP_UNPACK_DP(X,val) \
	do { \
	_FP_UNPACK_RAW_1_P(D,X,val); \
	_FP_UNPACK_CANONICAL(D,1,X); \
	} while (0)

	#define FP_PACK_D(val,X) \
	do { \
	_FP_PACK_CANONICAL(D,1,X); \
	_FP_PACK_RAW_1(D,val,X); \
	} while (0)

	#define FP_PACK_DP(val,X) \
	do { \
	_FP_PACK_CANONICAL(D,1,X); \
	if (!FP_INHIBIT_RESULTS) \
	_FP_PACK_RAW_1_P(D,val,X); \
	} while (0)

	#define FP_ISSIGNAN_D(X) _FP_ISSIGNAN(D,1,X)
	#define FP_NEG_D(R,X) _FP_NEG(D,1,R,X)
	#define FP_ADD_D(R,X,Y) _FP_ADD(D,1,R,X,Y)
	#define FP_SUB_D(R,X,Y) _FP_SUB(D,1,R,X,Y)
	#define FP_MUL_D(R,X,Y) _FP_MUL(D,1,R,X,Y)
	#define FP_DIV_D(R,X,Y) _FP_DIV(D,1,R,X,Y)
	#define FP_SQRT_D(R,X) _FP_SQRT(D,1,R,X)
	#define _FP_SQRT_MEAT_D(R,S,T,X,Q) _FP_SQRT_MEAT_1(R,S,T,X,Q)

	/* The implementation of _FP_MUL_D and _FP_DIV_D should be chosen by
	the target machine. */

	#define FP_CMP_D(r,X,Y,un) _FP_CMP(D,1,r,X,Y,un)
	#define FP_CMP_EQ_D(r,X,Y) _FP_CMP_EQ(D,1,r,X,Y)

	#define FP_TO_INT_D(r,X,rsz,rsg) _FP_TO_INT(D,1,r,X,rsz,rsg)
	#define FP_TO_INT_ROUND_D(r,X,rsz,rsg) _FP_TO_INT_ROUND(D,1,r,X,rsz,rsg)
	#define FP_FROM_INT_D(X,r,rs,rt) _FP_FROM_INT(D,1,X,r,rs,rt)

	#define _FP_FRAC_HIGH_D(X) _FP_FRAC_HIGH_1(X)
	#define _FP_FRAC_HIGH_RAW_D(X) _FP_FRAC_HIGH_1(X)

	#endif /* W_TYPE_SIZE < 64 */


	#endif /* __MATH_EMU_DOUBLE_H__ */