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/* d-longdouble.cc -- Software floating-point emulation for the frontend.
Copyright (C) 2006-2019 Free Software Foundation, Inc.
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.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "dmd/mtype.h"
#include "tree.h"
#include "fold-const.h"
#include "diagnostic.h"
#include "stor-layout.h"
#include "d-tree.h"
#include "longdouble.h"
/* Constant real values 0, 1, -1 and 0.5. */
real_t CTFloat::zero;
real_t CTFloat::one;
real_t CTFloat::minusone;
real_t CTFloat::half;
/* Truncate longdouble to the highest precision supported by target. */
longdouble
longdouble::normalize (void)
{
const machine_mode mode = TYPE_MODE (long_double_type_node);
real_convert (&this->rv (), mode, &this->rv ());
return *this;
}
/* Assign a real_value to a longdouble type. */
void
longdouble::set (real_value& d)
{
real_convert (&this->rv (), TYPE_MODE (long_double_type_node), &d);
}
/* Conversion routines between longdouble and integer types. */
void
longdouble::set (int32_t d)
{
real_from_integer (&this->rv (), TYPE_MODE (double_type_node), d, SIGNED);
}
void
longdouble::set (int64_t d)
{
real_from_integer (&this->rv (), TYPE_MODE (long_double_type_node), d,
SIGNED);
}
int64_t
longdouble::to_int (void) const
{
bool overflow;
wide_int wi = real_to_integer (&this->rv (), &overflow, 64);
return wi.to_shwi ();
}
/* Unsigned variants of the same conversion routines. */
void
longdouble::set (uint32_t d)
{
real_from_integer (&this->rv (), TYPE_MODE (double_type_node), d, UNSIGNED);
}
void
longdouble::set (uint64_t d)
{
real_from_integer (&this->rv (), TYPE_MODE (long_double_type_node), d,
UNSIGNED);
}
uint64_t
longdouble::to_uint (void) const
{
bool overflow;
wide_int wi = real_to_integer (&this->rv (), &overflow, 64);
return wi.to_uhwi ();
}
/* For conversion between boolean, only need to check if is zero. */
void
longdouble::set (bool d)
{
this->rv () = (d == false) ? dconst0 : dconst1;
}
bool
longdouble::to_bool (void) const
{
return this->rv ().cl != rvc_zero;
}
/* Overload numeric operators for longdouble types. */
longdouble
longdouble::add (const longdouble& r) const
{
longdouble x;
real_arithmetic (&x.rv (), PLUS_EXPR, &this->rv (), &r.rv ());
return x.normalize ();
}
longdouble
longdouble::sub (const longdouble& r) const
{
longdouble x;
real_arithmetic (&x.rv (), MINUS_EXPR, &this->rv (), &r.rv ());
return x.normalize ();
}
longdouble
longdouble::mul (const longdouble& r) const
{
longdouble x;
real_arithmetic (&x.rv (), MULT_EXPR, &this->rv (), &r.rv ());
return x.normalize ();
}
longdouble
longdouble::div (const longdouble& r) const
{
longdouble x;
real_arithmetic (&x.rv (), RDIV_EXPR, &this->rv (), &r.rv ());
return x.normalize ();
}
longdouble
longdouble::mod (const longdouble& r) const
{
longdouble x;
real_value q;
if (r.rv ().cl == rvc_zero || REAL_VALUE_ISINF (this->rv ()))
{
real_nan (&x.rv (), "", 1, TYPE_MODE (long_double_type_node));
return x;
}
if (this->rv ().cl == rvc_zero)
return *this;
if (REAL_VALUE_ISINF (r.rv ()))
return *this;
/* Need to check for NaN? */
real_arithmetic (&q, RDIV_EXPR, &this->rv (), &r.rv ());
real_arithmetic (&q, FIX_TRUNC_EXPR, &q, NULL);
real_arithmetic (&q, MULT_EXPR, &q, &r.rv ());
real_arithmetic (&x.rv (), MINUS_EXPR, &this->rv (), &q);
return x.normalize ();
}
longdouble
longdouble::neg (void) const
{
longdouble x;
real_arithmetic (&x.rv (), NEGATE_EXPR, &this->rv (), NULL);
return x.normalize ();
}
/* Overload equality operators for longdouble types. */
int
longdouble::cmp (const longdouble& r) const
{
if (real_compare (LT_EXPR, &this->rv (), &r.rv ()))
return -1;
if (real_compare (GT_EXPR, &this->rv (), &r.rv ()))
return 1;
return 0;
}
int
longdouble::equals (const longdouble& r) const
{
return real_compare (EQ_EXPR, &this->rv (), &r.rv ());
}
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