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/* A few TImode functions needed for TFmode emulated arithmetic.
Copyright 2002, 2003 Free Software Foundation, Inc.
Contributed by Alexandre Oliva <aoliva@redhat.com>
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 2, 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.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "tconfig.h"
#if _MIPS_SIM == 2 /* N32 */ || _MIPS_SIM == 3 /* 64 */
typedef int TItype __attribute__ ((mode (TI)));
typedef int DItype __attribute__ ((mode (DI)));
typedef int SItype __attribute__ ((mode (SI)));
typedef unsigned int UDItype __attribute__ ((mode (DI)));
typedef union
{
struct TIstruct {
#if LIBGCC2_WORDS_BIG_ENDIAN
DItype high, low;
#else
DItype low, high;
#endif
} s;
TItype ll;
} TIunion;
TItype __negti2 (TItype);
TItype __ashlti3 (TItype, int);
#if 0
TItype __ashrti3 (TItype, int);
#endif
TItype __lshrti3 (TItype, int);
TItype
__negti2 (TItype u)
{
TIunion w;
TIunion uu;
uu.ll = u;
w.s.low = -uu.s.low;
w.s.high = -uu.s.high - ((UDItype) w.s.low > 0);
return w.ll;
}
TItype
__ashlti3 (TItype u, int b)
{
TIunion w;
int bm;
TIunion uu;
if (b == 0)
return u;
uu.ll = u;
bm = (sizeof (DItype) * BITS_PER_UNIT) - b;
if (bm <= 0)
{
w.s.low = 0;
w.s.high = (UDItype) uu.s.low << -bm;
}
else
{
UDItype carries = (UDItype) uu.s.low >> bm;
w.s.low = (UDItype) uu.s.low << b;
w.s.high = ((UDItype) uu.s.high << b) | carries;
}
return w.ll;
}
#if 0
TItype
__ashrti3 (TItype u, int b)
{
TIunion w;
int bm;
TIunion uu;
if (b == 0)
return u;
uu.ll = u;
bm = (sizeof (DItype) * BITS_PER_UNIT) - b;
if (bm <= 0)
{
/* w.s.high = 1..1 or 0..0 */
w.s.high = uu.s.high >> (sizeof (DItype) * BITS_PER_UNIT - 1);
w.s.low = uu.s.high >> -bm;
}
else
{
UDItype carries = (UDItype) uu.s.high << bm;
w.s.high = uu.s.high >> b;
w.s.low = ((UDItype) uu.s.low >> b) | carries;
}
return w.ll;
}
#endif
TItype
__lshrti3 (TItype u, int b)
{
TIunion w;
int bm;
TIunion uu;
if (b == 0)
return u;
uu.ll = u;
bm = (sizeof (DItype) * BITS_PER_UNIT) - b;
if (bm <= 0)
{
w.s.high = 0;
w.s.low = (UDItype) uu.s.high >> -bm;
}
else
{
UDItype carries = (UDItype) uu.s.high << bm;
w.s.high = (UDItype) uu.s.high >> b;
w.s.low = ((UDItype) uu.s.low >> b) | carries;
}
return w.ll;
}
#endif /* N32 or N64 */
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