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ext: Update fputils to rev 6a47fd8358

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This patch updates fputils to the latest revision (6a47fd8358) from
the upstream repository (github.com/andysan/fputils). Most notably,
this includes changes that export a limited set of 64-bit float
manipulation and avoids a warning about unused 64-bit floats in clang.
This commit is contained in:
Andreas Sandberg 2014-10-16 05:49:58 -04:00
parent 2d2006ddb3
commit e6ad39adac
9 changed files with 292 additions and 56 deletions
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8
ext/fputils/Makefile.am
View file

@ -6,11 +6,17 @@ MOSTLYCLEANFILES=
lib_LTLIBRARIES = libfputils.la
include_HEADERS = include/fputils/fp80.h
include_HEADERS = \
include/fputils/fp80.h \
include/fputils/fp64.h \
include/fputils/fptypes.h
libfputils_la_SOURCES = \
include/fputils/fp80.h \
include/fputils/fp64.h \
include/fputils/fptypes.h \
fpbits.h \
fp64.c \
fp80.c

1
ext/fputils/SConscript
View file

@ -40,6 +40,7 @@ if fpenv['GCC']:
fpenv.Append(CCFLAGS=['-std=c99'])
fpenv.Library('fputils', [
fpenv.SharedObject('fp64.c'),
fpenv.SharedObject('fp80.c'),
])

2
ext/fputils/configure.in → ext/fputils/configure.ac
View file

@ -2,7 +2,7 @@ AC_INIT(libfputils, 1.0, andreas@sandberg.pp.se)
AC_CONFIG_MACRO_DIR([m4])
AM_INIT_AUTOMAKE([foreign -Wall -Werror])
AM_INIT_AUTOMAKE([foreign -Wall])
DX_PDF_FEATURE(OFF)
DX_PS_FEATURE(OFF)

45
ext/fputils/fp64.c Normal file
View file

@ -0,0 +1,45 @@
/*
* Copyright (c) 2014, Andreas Sandberg
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <fputils/fp64.h>
#include "fpbits.h"
#include <assert.h>
#include <stdint.h>
#include <stdio.h>
const fp64_t fp64_pinf = BUILD_FP64(0, 0, FP64_EXP_SPECIAL);
const fp64_t fp64_ninf = BUILD_FP64(1, 0, FP64_EXP_SPECIAL);
const fp64_t fp64_qnan = BUILD_FP64(0, FP64_FRAC_QNAN, FP64_EXP_SPECIAL);
const fp64_t fp64_nqnan = BUILD_FP64(1, FP64_FRAC_QNAN, FP64_EXP_SPECIAL);
const fp64_t fp64_qnani = BUILD_FP64(1, FP64_FRAC_QNANI, FP64_EXP_SPECIAL);
const fp64_t fp64_snan = BUILD_FP64(0, FP64_FRAC_SNAN, FP64_EXP_SPECIAL);
const fp64_t fp64_nsnan = BUILD_FP64(1, FP64_FRAC_SNAN, FP64_EXP_SPECIAL);
const fp64_t fp64_nan = BUILD_FP64(0, FP64_FRAC_QNAN, FP64_EXP_SPECIAL);

56
ext/fputils/fp80.c
View file

@ -28,6 +28,7 @@
*/
#include <fputils/fp80.h>
#include <fputils/fp64.h>
#include "fpbits.h"
#include <assert.h>
@ -35,39 +36,13 @@
#include <stdio.h>
typedef union {
uint64_t bits;
double value;
} fp64_t;
const fp80_t fp80_pinf = BUILD_FP80(0, 0, FP80_EXP_SPECIAL);
const fp80_t fp80_ninf = BUILD_FP80(1, 0, FP80_EXP_SPECIAL);
const fp80_t fp80_qnan = BUILD_FP80(0, FP80_FRAC_QNAN, FP80_EXP_SPECIAL);
const fp80_t fp80_pinf = BUILD_FP80(0, 0, FP80_EXP_SPECIAL);
const fp80_t fp80_ninf = BUILD_FP80(1, 0, FP80_EXP_SPECIAL);
const fp80_t fp80_qnan = BUILD_FP80(0, FP80_FRAC_QNAN, FP80_EXP_SPECIAL);
const fp80_t fp80_qnani = BUILD_FP80(1, FP80_FRAC_QNANI, FP80_EXP_SPECIAL);
const fp80_t fp80_snan = BUILD_FP80(0, FP80_FRAC_SNAN, FP80_EXP_SPECIAL);
const fp80_t fp80_nan = BUILD_FP80(0, FP80_FRAC_QNAN, FP80_EXP_SPECIAL);
static const fp64_t fp64_pinf = BUILD_FP64(0, 0, FP64_EXP_SPECIAL);
static const fp64_t fp64_ninf = BUILD_FP64(1, 0, FP64_EXP_SPECIAL);
static const fp64_t fp64_qnan = BUILD_FP64(0, FP64_FRAC_QNAN,
FP64_EXP_SPECIAL);
static const fp64_t fp64_nqnan = BUILD_FP64(1, FP64_FRAC_QNAN,
FP64_EXP_SPECIAL);
static const fp64_t fp64_qnani = BUILD_FP64(1, FP64_FRAC_QNANI,
FP64_EXP_SPECIAL);
static const fp64_t fp64_snan = BUILD_FP64(0, FP64_FRAC_SNAN,
FP64_EXP_SPECIAL);
static const fp64_t fp64_nsnan = BUILD_FP64(1, FP64_FRAC_SNAN,
FP64_EXP_SPECIAL);
static double
build_fp64(int sign, uint64_t frac, int exp)
{
const fp64_t f = BUILD_FP64(sign, frac, exp);
return f.value;
}
const fp80_t fp80_snan = BUILD_FP80(0, FP80_FRAC_SNAN, FP80_EXP_SPECIAL);
const fp80_t fp80_nan = BUILD_FP80(0, FP80_FRAC_QNAN, FP80_EXP_SPECIAL);
int
fp80_sgn(fp80_t fp80)
@ -166,6 +141,12 @@ fp80_classify(fp80_t fp80)
double
fp80_cvtd(fp80_t fp80)
{
return fp80_cvtfp64(fp80).value;
}
fp64_t
fp80_cvtfp64(fp80_t fp80)
{
const int sign = fp80.repr.se & FP80_SIGN_BIT;
@ -191,12 +172,12 @@ fp80_cvtd(fp80_t fp80)
if (fp80_isinf(fp80)) {
return build_fp64(sign, 0, FP64_EXP_SPECIAL);
} else if (fp80_issnan(fp80)) {
return fp80_sgn(fp80) > 0 ? fp64_snan.value : fp64_nsnan.value;
return fp80_sgn(fp80) > 0 ? fp64_snan : fp64_nsnan;
} else if (fp80_isqnani(fp80)) {
return fp64_qnani.value;
return fp64_qnani;
} else {
assert(fp80_isqnan(fp80));
return fp80_sgn(fp80) > 0 ? fp64_qnan.value : fp64_nqnan.value;
return fp80_sgn(fp80) > 0 ? fp64_qnan : fp64_nqnan;
}
}
}
@ -205,6 +186,13 @@ fp80_t
fp80_cvfd(double value)
{
const fp64_t fp64 = { .value = value };
return fp80_cvffp64(fp64);
}
fp80_t
fp80_cvffp64(fp64_t fp64)
{
const uint64_t frac = FP64_FRAC(fp64);
const unsigned exp = FP64_EXP(fp64);
const int unb_exp = exp - FP64_EXP_BIAS;

17
ext/fputils/fpbits.h
View file

@ -66,6 +66,14 @@
#define BUILD_FP64(sign, frac, exp) \
{ .bits = BUILD_IFP64(sign, frac, exp) }
static inline fp64_t
build_fp64(int sign, uint64_t frac, int exp)
{
const fp64_t f = BUILD_FP64(sign, frac, exp);
return f;
}
#define BUILD_FP80_SE(sign, exp) \
((sign) ? FP80_SIGN_BIT : 0) | \
((exp) & FP80_EXP_MASK)
@ -80,6 +88,14 @@
.repr.fi = BUILD_FP80_FI(frac, exp) \
}
static inline fp80_t
build_fp80(int sign, uint64_t frac, int exp)
{
const fp80_t f = BUILD_FP80(sign, frac, exp);
return f;
}
#define FP80_FRAC(fp80) \
(fp80.repr.fi & FP80_FRAC_MASK)
@ -92,4 +108,5 @@
#define FP64_EXP(fp80) \
((fp64.bits & FP64_EXP_MASK) >> FP64_EXP_SHIFT)
#endif

73
ext/fputils/include/fputils/fp64.h Normal file
View file

@ -0,0 +1,73 @@
/*
* Copyright (c) 2014, Andreas Sandberg
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _FP64_H
#define _FP64_H 1
#include <fputils/fptypes.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup fp64 64-bit Floats
* Functions handling 64-bit floats.
*
* @{
*/
/** Constant representing +inf */
extern const fp64_t fp64_pinf;
/** Constant representing -inf */
extern const fp64_t fp64_ninf;
/** Constant representing a quiet NaN */
extern const fp64_t fp64_qnan;
/** Constant representing a negative quiet NaN */
extern const fp64_t fp64_nqnan;
/** Constant representing a quiet indefinite NaN */
extern const fp64_t fp64_qnani;
/** Constant representing a signaling NaN */
extern const fp64_t fp64_snan;
/** Constant representing a negative signaling NaN */
extern const fp64_t fp64_nsnan;
/** Alias for fp64_qnan */
extern const fp64_t fp64_nan;
/** @} */
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif

60
ext/fputils/include/fputils/fp80.h
View file

@ -30,10 +30,12 @@
#ifndef _FP80_H
#define _FP80_H 1
#include <math.h>
#include <stdint.h>
#include <math.h> /* FP_NAN et al. */
#include <stdio.h>
#include <fputils/fptypes.h>
#ifdef __cplusplus
extern "C" {
#endif
@ -45,15 +47,6 @@ extern "C" {
* @{
*/
/** Internal representation of an 80-bit float. */
typedef union {
char bits[10];
struct {
uint64_t fi;
uint16_t se;
} repr;
} fp80_t;
/** Constant representing +inf */
extern const fp80_t fp80_pinf;
/** Constant representing -inf */
@ -190,6 +183,21 @@ int fp80_iszero(fp80_t fp80);
*/
int fp80_issubnormal(fp80_t fp80);
/**
* Convert an 80-bit float to a 64-bit double.
*
* Convenience wrapper around fp80_cvtfp64() that returns a double
* instead of the internal fp64_t representation.
*
* Note that this conversion is lossy, see fp80_cvtfp64() for details
* of the conversion.
*
* @param fp80 Source value to convert.
* @return value represented as double.
*/
double fp80_cvtd(fp80_t fp80);
/**
* Convert an 80-bit float to a 64-bit double.
*
@ -214,22 +222,34 @@ int fp80_issubnormal(fp80_t fp80);
* @param fp80 Source value to convert.
* @return 64-bit version of the float.
*/
double fp80_cvtd(fp80_t fp80);
fp64_t fp80_cvtfp64(fp80_t fp80);
/**
* Convert an 64-bit double to an 80-bit float.
* Convert a double to an 80-bit float.
*
* This function converts a standard 64-bit double into an 80-bit
* float. This conversion is completely lossless since the 80-bit
* float represents a superset of what a 64-bit double can
* represent.
* This is a convenience wrapper around fp80_cvffp64() and provides a
* convenient way of using the native double type instead of the
* internal fp64_t representation.
*
* @param fpd Source value to convert.
* @return 80-bit version of the float.
*/
fp80_t fp80_cvfd(double fpd);
/**
* Convert a 64-bit float to an 80-bit float.
*
* This function converts the internal representation of a 64-bit
* float into an 80-bit float. This conversion is completely lossless
* since the 80-bit float represents a superset of what a 64-bit
* float can represent.
*
* @note Denormals will be converted to normalized values.
*
* @param fpd Source value to convert.
* @return 64-bit version of the float.
* @param fp64 64-bit float to convert.
* @return 80-bit version of the float.
*/
fp80_t fp80_cvfd(double fpd);
fp80_t fp80_cvffp64(fp64_t fp64);
/**
* Dump the components of an 80-bit float to a file.

86
ext/fputils/include/fputils/fptypes.h Normal file
View file

@ -0,0 +1,86 @@
/*
* Copyright (c) 2014, Andreas Sandberg
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _FPTYPES_H
#define _FPTYPES_H 1
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* @addtogroup fp64
* @{
*/
/** Internal representation of a 64-bit float */
typedef union {
/**
* Raw value exposed as an unsigned integer. Mainly used for bit
* manipulation.
*/
uint64_t bits;
/** Representation using the built-in double type */
double value;
} fp64_t;
/** @} */
/**
* @addtogroup fp80
* @{
*/
/** Internal representation of an 80-bit float. */
typedef union {
struct {
/** Raw representation of the integer part bit and the
* fraction. Note that unlike 64-bit floating point
* representations the integer bit is explicit. */
uint64_t fi;
/** Raw representation of sign bit and exponent */
uint16_t se;
} repr;
/**
* Represented as a char array, mainly intended for debug dumping
* and serialization.
*/
char bits[10];
} fp80_t;
/** @} */
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif