238 lines
6.3 KiB
C
238 lines
6.3 KiB
C
/* Functions needed for soft-float on powerpc64-linux, copied from
|
|
libgcc2.c with macros expanded to force the use of specific types.
|
|
|
|
Copyright (C) 1989-2015 Free Software Foundation, Inc.
|
|
|
|
This file is part of GCC.
|
|
|
|
GCC is free software; you can redistribute it and/or modify it under
|
|
the terms of the GNU General Public License as published by the Free
|
|
Software Foundation; either version 3, or (at your option) any later
|
|
version.
|
|
|
|
GCC 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 General Public License
|
|
for more details.
|
|
|
|
Under Section 7 of GPL version 3, you are granted additional
|
|
permissions described in the GCC Runtime Library Exception, version
|
|
3.1, as published by the Free Software Foundation.
|
|
|
|
You should have received a copy of the GNU General Public License and
|
|
a copy of the GCC Runtime Library Exception along with this program;
|
|
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#if defined(__powerpc64__) || defined (__64BIT__) || defined(__ppc64__)
|
|
#define TMODES
|
|
#include "fp-bit.h"
|
|
|
|
extern DItype __fixtfdi (TFtype);
|
|
extern DItype __fixdfdi (DFtype);
|
|
extern DItype __fixsfdi (SFtype);
|
|
extern USItype __fixunsdfsi (DFtype);
|
|
extern USItype __fixunssfsi (SFtype);
|
|
extern TFtype __floatditf (DItype);
|
|
extern TFtype __floatunditf (UDItype);
|
|
extern DFtype __floatdidf (DItype);
|
|
extern DFtype __floatundidf (UDItype);
|
|
extern SFtype __floatdisf (DItype);
|
|
extern SFtype __floatundisf (UDItype);
|
|
extern DItype __fixunstfdi (TFtype);
|
|
|
|
static DItype local_fixunssfdi (SFtype);
|
|
static DItype local_fixunsdfdi (DFtype);
|
|
|
|
DItype
|
|
__fixtfdi (TFtype a)
|
|
{
|
|
if (a < 0)
|
|
return - __fixunstfdi (-a);
|
|
return __fixunstfdi (a);
|
|
}
|
|
|
|
DItype
|
|
__fixdfdi (DFtype a)
|
|
{
|
|
if (a < 0)
|
|
return - local_fixunsdfdi (-a);
|
|
return local_fixunsdfdi (a);
|
|
}
|
|
|
|
DItype
|
|
__fixsfdi (SFtype a)
|
|
{
|
|
if (a < 0)
|
|
return - local_fixunssfdi (-a);
|
|
return local_fixunssfdi (a);
|
|
}
|
|
|
|
USItype
|
|
__fixunsdfsi (DFtype a)
|
|
{
|
|
if (a >= - (DFtype) (- ((SItype)(((USItype)1 << ((4 * 8) - 1)) - 1)) - 1))
|
|
return (SItype) (a + (- ((SItype)(((USItype)1 << ((4 * 8) - 1)) - 1)) - 1))
|
|
- (- ((SItype)(((USItype)1 << ((4 * 8) - 1)) - 1)) - 1);
|
|
return (SItype) a;
|
|
}
|
|
|
|
USItype
|
|
__fixunssfsi (SFtype a)
|
|
{
|
|
if (a >= - (SFtype) (- ((SItype)(((USItype)1 << ((4 * 8) - 1)) - 1)) - 1))
|
|
return (SItype) (a + (- ((SItype)(((USItype)1 << ((4 * 8) - 1)) - 1)) - 1))
|
|
- (- ((SItype)(((USItype)1 << ((4 * 8) - 1)) - 1)) - 1);
|
|
return (SItype) a;
|
|
}
|
|
|
|
TFtype
|
|
__floatditf (DItype u)
|
|
{
|
|
DFtype dh, dl;
|
|
|
|
dh = (SItype) (u >> (sizeof (SItype) * 8));
|
|
dh *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1));
|
|
dl = (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1));
|
|
|
|
return (TFtype) dh + (TFtype) dl;
|
|
}
|
|
|
|
TFtype
|
|
__floatunditf (UDItype u)
|
|
{
|
|
DFtype dh, dl;
|
|
|
|
dh = (USItype) (u >> (sizeof (SItype) * 8));
|
|
dh *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1));
|
|
dl = (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1));
|
|
|
|
return (TFtype) dh + (TFtype) dl;
|
|
}
|
|
|
|
DFtype
|
|
__floatdidf (DItype u)
|
|
{
|
|
DFtype d;
|
|
|
|
d = (SItype) (u >> (sizeof (SItype) * 8));
|
|
d *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1));
|
|
d += (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1));
|
|
|
|
return d;
|
|
}
|
|
|
|
DFtype
|
|
__floatundidf (UDItype u)
|
|
{
|
|
DFtype d;
|
|
|
|
d = (USItype) (u >> (sizeof (SItype) * 8));
|
|
d *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1));
|
|
d += (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1));
|
|
|
|
return d;
|
|
}
|
|
|
|
SFtype
|
|
__floatdisf (DItype u)
|
|
{
|
|
DFtype f;
|
|
|
|
if (53 < (sizeof (DItype) * 8)
|
|
&& 53 > ((sizeof (DItype) * 8) - 53 + 24))
|
|
{
|
|
if (! (- ((DItype) 1 << 53) < u
|
|
&& u < ((DItype) 1 << 53)))
|
|
{
|
|
if ((UDItype) u & (((UDItype) 1 << ((sizeof (DItype) * 8) - 53)) - 1))
|
|
{
|
|
u &= ~ (((UDItype) 1 << ((sizeof (DItype) * 8) - 53)) - 1);
|
|
u |= ((UDItype) 1 << ((sizeof (DItype) * 8) - 53));
|
|
}
|
|
}
|
|
}
|
|
f = (SItype) (u >> (sizeof (SItype) * 8));
|
|
f *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1));
|
|
f += (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1));
|
|
|
|
return (SFtype) f;
|
|
}
|
|
|
|
SFtype
|
|
__floatundisf (UDItype u)
|
|
{
|
|
DFtype f;
|
|
|
|
if (53 < (sizeof (DItype) * 8)
|
|
&& 53 > ((sizeof (DItype) * 8) - 53 + 24))
|
|
{
|
|
if (u >= ((UDItype) 1 << 53))
|
|
{
|
|
if ((UDItype) u & (((UDItype) 1 << ((sizeof (DItype) * 8) - 53)) - 1))
|
|
{
|
|
u &= ~ (((UDItype) 1 << ((sizeof (DItype) * 8) - 53)) - 1);
|
|
u |= ((UDItype) 1 << ((sizeof (DItype) * 8) - 53));
|
|
}
|
|
}
|
|
}
|
|
f = (USItype) (u >> (sizeof (SItype) * 8));
|
|
f *= 2.0 * (((UDItype) 1) << ((sizeof (SItype) * 8) - 1));
|
|
f += (USItype) (u & ((((UDItype) 1) << (sizeof (SItype) * 8)) - 1));
|
|
|
|
return (SFtype) f;
|
|
}
|
|
|
|
DItype
|
|
__fixunstfdi (TFtype a)
|
|
{
|
|
if (a < 0)
|
|
return 0;
|
|
|
|
/* Compute high word of result, as a flonum. */
|
|
const TFtype b = (a / (((UDItype) 1) << (sizeof (SItype) * 8)));
|
|
/* Convert that to fixed (but not to DItype!),
|
|
and shift it into the high word. */
|
|
UDItype v = (USItype) b;
|
|
v <<= (sizeof (SItype) * 8);
|
|
/* Remove high part from the TFtype, leaving the low part as flonum. */
|
|
a -= (TFtype) v;
|
|
/* Convert that to fixed (but not to DItype!) 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 -= (USItype) (-a);
|
|
else
|
|
v += (USItype) a;
|
|
return v;
|
|
}
|
|
|
|
/* This version is needed to prevent recursion; fixunsdfdi in libgcc
|
|
calls fixdfdi, which in turn calls calls fixunsdfdi. */
|
|
|
|
static DItype
|
|
local_fixunsdfdi (DFtype a)
|
|
{
|
|
USItype hi, lo;
|
|
|
|
hi = a / (((UDItype) 1) << (sizeof (SItype) * 8));
|
|
lo = (a - ((DFtype) hi) * (((UDItype) 1) << (sizeof (SItype) * 8)));
|
|
return ((UDItype) hi << (sizeof (SItype) * 8)) | lo;
|
|
}
|
|
|
|
/* This version is needed to prevent recursion; fixunssfdi in libgcc
|
|
calls fixsfdi, which in turn calls calls fixunssfdi. */
|
|
|
|
static DItype
|
|
local_fixunssfdi (SFtype original_a)
|
|
{
|
|
DFtype a = original_a;
|
|
USItype hi, lo;
|
|
|
|
hi = a / (((UDItype) 1) << (sizeof (SItype) * 8));
|
|
lo = (a - ((DFtype) hi) * (((UDItype) 1) << (sizeof (SItype) * 8)));
|
|
return ((UDItype) hi << (sizeof (SItype) * 8)) | lo;
|
|
}
|
|
|
|
#endif /* __powerpc64__ */
|