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/* Convert float to 64-bit int.
Copyright (C) 1989, 1992-2001, 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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.
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, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <endian.h>
#include <stdlib.h>
#include <bits/wordsize.h>
#include <shlib-compat.h>
#if __WORDSIZE != 32
# error This is for 32-bit targets only
#endif
#if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_2_6)
typedef unsigned int UQItype __attribute__ ((mode (QI)));
typedef int SItype __attribute__ ((mode (SI)));
typedef unsigned int USItype __attribute__ ((mode (SI)));
typedef int DItype __attribute__ ((mode (DI)));
typedef unsigned int UDItype __attribute__ ((mode (DI)));
typedef float SFtype __attribute__ ((mode (SF)));
typedef float DFtype __attribute__ ((mode (DF)));
#define Wtype SItype
#define HWtype SItype
#define DWtype DItype
#define UWtype USItype
#define UHWtype USItype
#define UDWtype UDItype
#define W_TYPE_SIZE 32
#include <stdlib/longlong.h>
#if __BYTE_ORDER == __BIG_ENDIAN
struct DWstruct { Wtype high, low;};
#elif __BYTE_ORDER == __LITTLE_ENDIAN
struct DWstruct { Wtype low, high;};
#else
#error Unhandled endianity
#endif
typedef union { struct DWstruct s; DWtype ll; } DWunion;
#define WORD_SIZE __WORDSIZE
#define HIGH_WORD_COEFF (((UDWtype) 1) << WORD_SIZE)
DWtype
___fixunssfDI (SFtype original_a)
{
/* Convert the SFtype to a DFtype, because that is surely not going
to lose any bits. Some day someone else can write a faster version
that avoids converting to DFtype, and verify it really works right. */
DFtype a = original_a;
DFtype b;
UDWtype v;
if (a < 0)
return 0;
/* Compute high word of result, as a flonum. */
b = (a / HIGH_WORD_COEFF);
/* Convert that to fixed (but not to DWtype!),
and shift it into the high word. */
v = (UWtype) b;
v <<= WORD_SIZE;
/* Remove high part from the DFtype, leaving the low part as flonum. */
a -= (DFtype) v;
/* Convert that to fixed (but not to DWtype!) and add it in.
Sometimes A comes out negative. This is significant, since
A has more bits than a long int does. */
if (a < 0)
v -= (UWtype) (- a);
else
v += (UWtype) a;
return v;
}
symbol_version (___fixunssfDI, __fixunssfDI, GLIBC_2.0);
DWtype
___fixsfdi (SFtype a)
{
if (a < 0)
return - __fixunssfDI (-a);
return __fixunssfDI (a);
}
symbol_version (___fixsfdi, __fixsfdi, GLIBC_2.0);
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