265 lines
7.8 KiB
C
265 lines
7.8 KiB
C
/* Software floating-point emulation.
|
|
Definitions for IEEE Double Precision
|
|
Copyright (C) 1997,1998,1999,2006,2007 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 Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
In addition to the permissions in the GNU Lesser General Public
|
|
License, the Free Software Foundation gives you unlimited
|
|
permission to link the compiled version of this file into
|
|
combinations with other programs, and to distribute those
|
|
combinations without any restriction coming from the use of this
|
|
file. (The Lesser General Public License restrictions do apply in
|
|
other respects; for example, they cover modification of the file,
|
|
and distribution when not linked into a combine executable.)
|
|
|
|
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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, write to the Free
|
|
Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
|
|
MA 02110-1301, USA. */
|
|
|
|
#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_QNANBIT_SH_D \
|
|
((_FP_W_TYPE)1 << (_FP_FRACBITS_D-2+_FP_WORKBITS) % _FP_W_TYPE_SIZE)
|
|
#define _FP_IMPLBIT_D \
|
|
((_FP_W_TYPE)1 << (_FP_FRACBITS_D-1) % _FP_W_TYPE_SIZE)
|
|
#define _FP_IMPLBIT_SH_D \
|
|
((_FP_W_TYPE)1 << (_FP_FRACBITS_D-1+_FP_WORKBITS) % _FP_W_TYPE_SIZE)
|
|
#define _FP_OVERFLOW_D \
|
|
((_FP_W_TYPE)1 << _FP_WFRACBITS_D % _FP_W_TYPE_SIZE)
|
|
|
|
typedef float DFtype __attribute__((mode(DF)));
|
|
|
|
#if _FP_W_TYPE_SIZE < 64
|
|
|
|
union _FP_UNION_D
|
|
{
|
|
DFtype 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_UNPACK_SEMIRAW_D(X,val) \
|
|
do { \
|
|
_FP_UNPACK_RAW_2(D,X,val); \
|
|
_FP_UNPACK_SEMIRAW(D,2,X); \
|
|
} while (0)
|
|
|
|
#define FP_UNPACK_SEMIRAW_DP(X,val) \
|
|
do { \
|
|
_FP_UNPACK_RAW_2_P(D,X,val); \
|
|
_FP_UNPACK_SEMIRAW(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_PACK_SEMIRAW_D(val,X) \
|
|
do { \
|
|
_FP_PACK_SEMIRAW(D,2,X); \
|
|
_FP_PACK_RAW_2(D,val,X); \
|
|
} while (0)
|
|
|
|
#define FP_PACK_SEMIRAW_DP(val,X) \
|
|
do { \
|
|
_FP_PACK_SEMIRAW(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_CMP_UNORD_D(r,X,Y) _FP_CMP_UNORD(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_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
|
|
{
|
|
DFtype flt;
|
|
struct {
|
|
#if __BYTE_ORDER == __BIG_ENDIAN
|
|
unsigned sign : 1;
|
|
unsigned exp : _FP_EXPBITS_D;
|
|
_FP_W_TYPE frac : _FP_FRACBITS_D - (_FP_IMPLBIT_D != 0);
|
|
#else
|
|
_FP_W_TYPE 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_UNPACK_SEMIRAW_D(X,val) \
|
|
do { \
|
|
_FP_UNPACK_RAW_2(1,X,val); \
|
|
_FP_UNPACK_SEMIRAW(D,1,X); \
|
|
} while (0)
|
|
|
|
#define FP_UNPACK_SEMIRAW_DP(X,val) \
|
|
do { \
|
|
_FP_UNPACK_RAW_2_P(1,X,val); \
|
|
_FP_UNPACK_SEMIRAW(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_PACK_SEMIRAW_D(val,X) \
|
|
do { \
|
|
_FP_PACK_SEMIRAW(D,1,X); \
|
|
_FP_PACK_RAW_1(D,val,X); \
|
|
} while (0)
|
|
|
|
#define FP_PACK_SEMIRAW_DP(val,X) \
|
|
do { \
|
|
_FP_PACK_SEMIRAW(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_CMP_UNORD_D(r,X,Y) _FP_CMP_UNORD(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_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 */
|