#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "tree.h"
#include "dfp.h"
#include "decimal128.h"
#include "decimal64.h"
#include "decimal32.h"

Include dependency graph for dfp.cc:

Macros
#define	WORDS_BIGENDIAN 0

Functions
static void	decimal_from_decnumber (REAL_VALUE_TYPE r, decNumber dn, decContext *context)

void	decimal_real_from_string (REAL_VALUE_TYPE r, const char s)

static void	decimal_to_decnumber (const REAL_VALUE_TYPE r, decNumber dn)

void	encode_decimal32 (const struct real_format fmt, long buf, const REAL_VALUE_TYPE *r)

void	decode_decimal32 (const struct real_format fmt, REAL_VALUE_TYPE r, const long *buf)

void	encode_decimal64 (const struct real_format fmt, long buf, const REAL_VALUE_TYPE *r)

void	decode_decimal64 (const struct real_format fmt, REAL_VALUE_TYPE r, const long *buf)

void	encode_decimal128 (const struct real_format fmt, long buf, const REAL_VALUE_TYPE *r)

void	decode_decimal128 (const struct real_format fmt, REAL_VALUE_TYPE r, const long *buf)

static void	decimal_to_binary (REAL_VALUE_TYPE to, const REAL_VALUE_TYPE from, const real_format *fmt)

static void	decimal_from_binary (REAL_VALUE_TYPE to, const REAL_VALUE_TYPE from)

int	decimal_do_compare (const REAL_VALUE_TYPE a, const REAL_VALUE_TYPE b, int nan_result)

void	decimal_round_for_format (const struct real_format fmt, REAL_VALUE_TYPE r)

void	decimal_real_convert (REAL_VALUE_TYPE r, const real_format fmt, const REAL_VALUE_TYPE *a)

void	decimal_real_to_decimal (char str, const REAL_VALUE_TYPE r_orig, size_t buf_size, size_t digits, int crop_trailing_zeros)

static bool	decimal_do_add (REAL_VALUE_TYPE r, const REAL_VALUE_TYPE op0, const REAL_VALUE_TYPE *op1, int subtract_p)

static bool	decimal_do_multiply (REAL_VALUE_TYPE r, const REAL_VALUE_TYPE op0, const REAL_VALUE_TYPE *op1)

static bool	decimal_do_divide (REAL_VALUE_TYPE r, const REAL_VALUE_TYPE op0, const REAL_VALUE_TYPE *op1)

void	decimal_do_fix_trunc (REAL_VALUE_TYPE r, const REAL_VALUE_TYPE a)

HOST_WIDE_INT	decimal_real_to_integer (const REAL_VALUE_TYPE *r)

wide_int	decimal_real_to_integer (const REAL_VALUE_TYPE r, bool fail, int precision)

bool	decimal_real_arithmetic (REAL_VALUE_TYPE r, enum tree_code code, const REAL_VALUE_TYPE op0, const REAL_VALUE_TYPE *op1)

void	decimal_real_maxval (REAL_VALUE_TYPE *r, int sign, machine_mode mode)

Macro Definition Documentation

◆ WORDS_BIGENDIAN

#define WORDS_BIGENDIAN 0

Decimal floating point support.
   Copyright (C) 2005-2024 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.

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/>.

The order of the following headers is important for making sure
decNumber structure is large enough to hold decimal128 digits.

Referenced by decode_decimal128(), decode_decimal64(), encode_decimal128(), and encode_decimal64().

Function Documentation

◆ decimal_do_add()

static bool decimal_do_add	(	REAL_VALUE_TYPE *	r,
		const REAL_VALUE_TYPE *	op0,
		const REAL_VALUE_TYPE *	op1,
		int	subtract_p )

static

References decimal_from_decnumber(), decimal_to_decnumber(), ggc_alloc(), and r.

Referenced by decimal_real_arithmetic().

◆ decimal_do_compare()

int decimal_do_compare	(	const REAL_VALUE_TYPE *	a,
		const REAL_VALUE_TYPE *	b,
		int	nan_result )

Helper function to real.cc:do_compare() to handle decimal internal
representation including when one of the operands is still in the
binary internal representation.

References a, b, decimal_from_binary(), ggc_alloc(), and REAL_VALUE_TYPE.

Referenced by do_compare().

◆ decimal_do_divide()

static bool decimal_do_divide	(	REAL_VALUE_TYPE *	r,
		const REAL_VALUE_TYPE *	op0,
		const REAL_VALUE_TYPE *	op1 )

static

Compute R = OP0 / OP1.

References decimal_from_decnumber(), decimal_to_decnumber(), ggc_alloc(), and r.

Referenced by decimal_real_arithmetic().

◆ decimal_do_fix_trunc()

void decimal_do_fix_trunc	(	REAL_VALUE_TYPE *	r,
		const REAL_VALUE_TYPE *	a )

Set R to A truncated to an integral value toward zero (decimal
floating point).

References a, decimal_from_decnumber(), ggc_alloc(), and r.

Referenced by decimal_real_arithmetic(), and do_fix_trunc().

◆ decimal_do_multiply()

static bool decimal_do_multiply	(	REAL_VALUE_TYPE *	r,
		const REAL_VALUE_TYPE *	op0,
		const REAL_VALUE_TYPE *	op1 )

static

Compute R = OP0 * OP1.

References decimal_from_decnumber(), decimal_to_decnumber(), ggc_alloc(), and r.

Referenced by decimal_real_arithmetic().

◆ decimal_from_binary()

static void decimal_from_binary	(	REAL_VALUE_TYPE *	to,
		const REAL_VALUE_TYPE *	from )

static

Helper function to convert from a binary real internal
representation.

References decimal_real_from_string(), real_to_decimal(), and rvc_nan.

Referenced by decimal_do_compare(), decimal_real_arithmetic(), and decimal_real_convert().

◆ decimal_from_decnumber()

static void decimal_from_decnumber	(	REAL_VALUE_TYPE *	r,
		decNumber *	dn,
		decContext *	context )

static

Initialize R (a real with the decimal flag set) from DN.  Can
utilize status passed in via CONTEXT, if a previous operation had
interesting status.

References ggc_alloc(), r, REAL_VALUE_TYPE, rvc_inf, rvc_nan, and rvc_normal.

Referenced by decimal_do_add(), decimal_do_divide(), decimal_do_fix_trunc(), decimal_do_multiply(), decimal_real_from_string(), decimal_round_for_format(), decode_decimal128(), decode_decimal32(), and decode_decimal64().

◆ decimal_real_arithmetic()

bool decimal_real_arithmetic	(	REAL_VALUE_TYPE *	r,
		enum tree_code	code,
		const REAL_VALUE_TYPE *	op0,
		const REAL_VALUE_TYPE *	op1 )

Perform the decimal floating point operation described by CODE.
For a unary operation, OP1 will be NULL.  This function returns
true if the result may be inexact due to loss of precision.

References a, b, decimal_do_add(), decimal_do_divide(), decimal_do_fix_trunc(), decimal_do_multiply(), decimal_from_binary(), gcc_unreachable, ggc_alloc(), r, real_compare(), REAL_VALUE_TYPE, and rvc_nan.

Referenced by real_arithmetic().

◆ decimal_real_convert()

void decimal_real_convert	(	REAL_VALUE_TYPE *	r,
		const real_format *	fmt,
		const REAL_VALUE_TYPE *	a )

Extend or truncate to a new mode.  Handles conversions between
binary and decimal types.

References a, decimal_from_binary(), decimal_to_binary(), ggc_alloc(), and r.

Referenced by real_2expN(), real_convert(), and round_for_format().

◆ decimal_real_from_string()

void decimal_real_from_string	(	REAL_VALUE_TYPE *	r,
		const char *	s )

Create decimal encoded R from string S.

References decimal_from_decnumber(), ggc_alloc(), and r.

Referenced by build_real(), decimal_from_binary(), decimal_from_integer(), decimal_real_maxval(), real_from_string3(), and ubsan_instrument_float_cast().

◆ decimal_real_maxval()

void decimal_real_maxval	(	REAL_VALUE_TYPE *	r,
		int	sign,
		machine_mode	mode )

Fills R with the largest finite value representable in mode MODE.
If SIGN is nonzero, R is set to the most negative finite value.

References decimal_real_from_string(), gcc_unreachable, ggc_alloc(), and r.

Referenced by real_maxval().

◆ decimal_real_to_decimal()

void decimal_real_to_decimal	(	char *	str,
		const REAL_VALUE_TYPE *	r_orig,
		size_t	buf_size,
		size_t	digits,
		int	crop_trailing_zeros )

Render R_ORIG as a decimal floating point constant.  Emit DIGITS
significant digits in the result, bounded by BUF_SIZE.  If DIGITS
is 0, choose the maximum for the representation.  If
CROP_TRAILING_ZEROS, strip trailing zeros.  Currently, not honoring
DIGITS or CROP_TRAILING_ZEROS.

References gcc_assert, and ggc_alloc().

Referenced by real_to_decimal_for_mode().

◆ decimal_real_to_integer() [1/2]

HOST_WIDE_INT decimal_real_to_integer ( const REAL_VALUE_TYPE * r )

Render decimal float value R as an integer.

References ggc_alloc(), r, real_from_string(), real_to_integer(), and REAL_VALUE_TYPE.

Referenced by real_to_integer(), and real_to_integer().

◆ decimal_real_to_integer() [2/2]

wide_int decimal_real_to_integer	(	const REAL_VALUE_TYPE *	r,
		bool *	fail,
		int	precision )

Likewise, but returns a wide_int with PRECISION.  *FAIL is set if the
value does not fit.

References ggc_alloc(), r, real_from_string(), real_to_integer(), and REAL_VALUE_TYPE.

◆ decimal_round_for_format()

void decimal_round_for_format	(	const struct real_format *	fmt,
		REAL_VALUE_TYPE *	r )

Helper to round_for_format, handling decimal float types.

References decimal_double_format, decimal_from_decnumber(), decimal_quad_format, decimal_single_format, gcc_unreachable, ggc_alloc(), r, and rvc_normal.

Referenced by round_for_format().

◆ decimal_to_binary()

static void decimal_to_binary	(	REAL_VALUE_TYPE *	to,
		const REAL_VALUE_TYPE *	from,
		const real_format *	fmt )

static

Helper function to convert from a binary real internal
representation.

References ggc_alloc(), real_from_string3(), real_to_decimal(), and rvc_normal.

Referenced by decimal_real_convert().

◆ decimal_to_decnumber()

static void decimal_to_decnumber	(	const REAL_VALUE_TYPE *	r,
		decNumber *	dn )

static

Initialize a decNumber from a REAL_VALUE_TYPE.

References dconst1, dconst2, dconsthalf, dconstm1, gcc_unreachable, ggc_alloc(), r, rvc_inf, rvc_nan, rvc_normal, and rvc_zero.

Referenced by decimal_do_add(), decimal_do_divide(), decimal_do_multiply(), encode_decimal128(), encode_decimal32(), and encode_decimal64().

◆ decode_decimal128()

void decode_decimal128	(	const struct real_format *	fmt,
		REAL_VALUE_TYPE *	r,
		const long *	buf )

Decode an IEEE 754 decimal128 type into a real.

References decimal_from_decnumber(), FLOAT_WORDS_BIG_ENDIAN, ggc_alloc(), r, and WORDS_BIGENDIAN.

Referenced by decode_decimal_quad().

◆ decode_decimal32()

void decode_decimal32	(	const struct real_format *	fmt,
		REAL_VALUE_TYPE *	r,
		const long *	buf )

Decode an IEEE 754 decimal32 type into a real.

References decimal_from_decnumber(), ggc_alloc(), and r.

Referenced by decode_decimal_single().

◆ decode_decimal64()

void decode_decimal64	(	const struct real_format *	fmt,
		REAL_VALUE_TYPE *	r,
		const long *	buf )

Decode an IEEE 754 decimal64 type into a real.

References decimal_from_decnumber(), FLOAT_WORDS_BIG_ENDIAN, ggc_alloc(), r, and WORDS_BIGENDIAN.

Referenced by decode_decimal_double().

◆ encode_decimal128()

void encode_decimal128	(	const struct real_format *	fmt,
		long *	buf,
		const REAL_VALUE_TYPE *	r )

Encode a real into an IEEE 754 decimal128 type.

References decimal_to_decnumber(), FLOAT_WORDS_BIG_ENDIAN, ggc_alloc(), r, and WORDS_BIGENDIAN.

Referenced by encode_decimal_quad().

◆ encode_decimal32()

void encode_decimal32	(	const struct real_format *	fmt,
		long *	buf,
		const REAL_VALUE_TYPE *	r )

Encode a real into an IEEE 754 decimal32 type.

References decimal_to_decnumber(), ggc_alloc(), and r.

Referenced by encode_decimal_single().

◆ encode_decimal64()

void encode_decimal64	(	const struct real_format *	fmt,
		long *	buf,
		const REAL_VALUE_TYPE *	r )

Encode a real into an IEEE 754 decimal64 type.

References decimal_to_decnumber(), FLOAT_WORDS_BIG_ENDIAN, ggc_alloc(), r, and WORDS_BIGENDIAN.

Referenced by encode_decimal_double().

Macros

Functions

Macro Definition Documentation

◆ WORDS_BIGENDIAN

Function Documentation

◆ decimal_do_add()

◆ decimal_do_compare()

◆ decimal_do_divide()

◆ decimal_do_fix_trunc()

◆ decimal_do_multiply()

◆ decimal_from_binary()

◆ decimal_from_decnumber()

◆ decimal_real_arithmetic()

◆ decimal_real_convert()

◆ decimal_real_from_string()

◆ decimal_real_maxval()

◆ decimal_real_to_decimal()

◆ decimal_real_to_integer() [1/2]

◆ decimal_real_to_integer() [2/2]

◆ decimal_round_for_format()

◆ decimal_to_binary()

◆ decimal_to_decnumber()

◆ decode_decimal128()

◆ decode_decimal32()

◆ decode_decimal64()

◆ encode_decimal128()

◆ encode_decimal32()

◆ encode_decimal64()