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Refactor *cvt functions implementation (1/2) 

This patch refactors the *cvt functions implementation in a way that
makes it easier to re-use them for implementing the IEEE long double on
powerpc64le.  By splitting the implementation per se in one file
(efgcvt-template.c) and the alias definitions in others (e.g. efgcvt.c),
the new code makes it easier to define new function names, such as
__qecvtieee128.

Tested that installed stripped binaries for all build-many-glibcs
targets remain identical before and after this patch.  Also tested for
powerpc64le and x86_64.

Reviewed-by: Paul E. Murphy <murphyp@linux.ibm.com>
This commit is contained in:
Gabriel F. T. Gomes 2019-07-11 11:48:08 -03:00
parent 57e687c6d4
commit e18a305777
8 changed files with 424 additions and 385 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
misc/efgcvt-dbl-macros.h Normal file
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@ -0,0 +1,52 @@
/* Macros for the implementation of *cvt functions, double version.
Copyright (C) 1995-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <float.h>
#define FLOAT_TYPE double
#define FUNC_PREFIX
#define FLOAT_FMT_FLAG
#define FLOAT_NAME_EXT
#define FLOAT_MIN_10_EXP DBL_MIN_10_EXP
/* Actually we have to write (DBL_DIG + log10 (DBL_MAX_10_EXP)) but we
don't have log10 available in the preprocessor. */
#define MAXDIG (NDIGIT_MAX + 3)
#define FCVT_MAXDIG (DBL_MAX_10_EXP + MAXDIG)
#if DBL_MANT_DIG == 53
# define NDIGIT_MAX 17
#elif DBL_MANT_DIG == 24
# define NDIGIT_MAX 9
#elif DBL_MANT_DIG == 56
# define NDIGIT_MAX 18
#else
/* See IEEE 854 5.6, table 2 for this formula. Unfortunately we need a
compile time constant here, so we cannot use it. */
# error "NDIGIT_MAX must be precomputed"
# define NDIGIT_MAX (lrint (ceil (M_LN2 / M_LN10 * DBL_MANT_DIG + 1.0)))
#endif
#if DBL_MIN_10_EXP == -37
# define FLOAT_MIN_10_NORM 1.0e-37
#elif DBL_MIN_10_EXP == -307
# define FLOAT_MIN_10_NORM 1.0e-307
#elif DBL_MIN_10_EXP == -4931
# define FLOAT_MIN_10_NORM 1.0e-4931
#else
/* libc can't depend on libm. */
# error "FLOAT_MIN_10_NORM must be precomputed"
# define FLOAT_MIN_10_NORM exp10 (DBL_MIN_10_EXP)
#endif

59
misc/efgcvt-ldbl-macros.h Normal file
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@ -0,0 +1,59 @@
/* Macros for the implementation of *cvt functions, long double version.
Copyright (C) 1996-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <float.h>
#define FLOAT_TYPE long double
#define FUNC_PREFIX q
#define FLOAT_FMT_FLAG "L"
#define FLOAT_NAME_EXT l
#define FLOAT_MIN_10_EXP LDBL_MIN_10_EXP
/* Actually we have to write (LDBL_DIG + log10 (LDBL_MAX_10_EXP)) but
we don't have log10 available in the preprocessor. Since we cannot
assume anything on the used `long double' format be generous. */
#define MAXDIG (NDIGIT_MAX + 12)
#define FCVT_MAXDIG (LDBL_MAX_10_EXP + MAXDIG)
#if LDBL_MANT_DIG == 64
# define NDIGIT_MAX 21
#elif LDBL_MANT_DIG == 53
# define NDIGIT_MAX 17
#elif LDBL_MANT_DIG == 113
# define NDIGIT_MAX 36
#elif LDBL_MANT_DIG == 106
# define NDIGIT_MAX 34
#elif LDBL_MANT_DIG == 56
# define NDIGIT_MAX 18
#else
/* See IEEE 854 5.6, table 2 for this formula. Unfortunately we need a
compile time constant here, so we cannot use it. */
# error "NDIGIT_MAX must be precomputed"
# define NDIGIT_MAX (lrint (ceil (M_LN2 / M_LN10 * LDBL_MANT_DIG + 1.0)))
#endif
#if LDBL_MIN_10_EXP == -37
# define FLOAT_MIN_10_NORM 1.0e-37L
#elif LDBL_MIN_10_EXP == -291
# define FLOAT_MIN_10_NORM 1.0e-291L
#elif LDBL_MIN_10_EXP == -307
# define FLOAT_MIN_10_NORM 1.0e-307L
#elif LDBL_MIN_10_EXP == -4931
# define FLOAT_MIN_10_NORM 1.0e-4931L
#else
/* libc can't depend on libm. */
# error "FLOAT_MIN_10_NORM must be precomputed"
# define FLOAT_MIN_10_NORM exp10l (LDBL_MIN_10_EXP)
#endif

78
misc/efgcvt-template.c Normal file
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/* Compatibility functions for floating point formatting.
Copyright (C) 1995-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/param.h>
#include <libc-lock.h>
#include <math_ldbl_opt.h>
#define APPEND(a, b) APPEND2 (a, b)
#define APPEND2(a, b) a##b
#define __APPEND(a, b) __APPEND2 (a, b)
#define __APPEND2(a, b) __##a##b
#define FCVT_BUFFER APPEND (FUNC_PREFIX, fcvt_buffer)
#define FCVT_BUFPTR APPEND (FUNC_PREFIX, fcvt_bufptr)
#define ECVT_BUFFER APPEND (FUNC_PREFIX, ecvt_buffer)
static char FCVT_BUFFER[MAXDIG];
static char ECVT_BUFFER[MAXDIG];
libc_freeres_ptr (static char *FCVT_BUFPTR);
char *
__APPEND (FUNC_PREFIX, fcvt) (FLOAT_TYPE value, int ndigit, int *decpt,
int *sign)
{
if (FCVT_BUFPTR == NULL)
{
if (__APPEND (FUNC_PREFIX, fcvt_r) (value, ndigit, decpt, sign,
FCVT_BUFFER, MAXDIG) != -1)
return FCVT_BUFFER;
FCVT_BUFPTR = (char *) malloc (FCVT_MAXDIG);
if (FCVT_BUFPTR == NULL)
return FCVT_BUFFER;
}
(void) __APPEND (FUNC_PREFIX, fcvt_r) (value, ndigit, decpt, sign,
FCVT_BUFPTR, FCVT_MAXDIG);
return FCVT_BUFPTR;
}
char *
__APPEND (FUNC_PREFIX, ecvt) (FLOAT_TYPE value, int ndigit, int *decpt,
int *sign)
{
(void) __APPEND (FUNC_PREFIX, ecvt_r) (value, ndigit, decpt, sign,
ECVT_BUFFER, MAXDIG);
return ECVT_BUFFER;
}
char *
__APPEND (FUNC_PREFIX, gcvt) (FLOAT_TYPE value, int ndigit, char *buf)
{
sprintf (buf, "%.*" FLOAT_FMT_FLAG "g", MIN (ndigit, NDIGIT_MAX), value);
return buf;
}

101
misc/efgcvt.c
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@ -1,4 +1,4 @@
/* Compatibility functions for floating point formatting.
/* Double versions of *cvt_r functions.
Copyright (C) 1995-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
@ -16,107 +16,16 @@
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/param.h>
#include <float.h>
#include <libc-lock.h>
#include <math_ldbl_opt.h>
#ifndef FLOAT_TYPE
# define FLOAT_TYPE double
# define FUNC_PREFIX
# define FLOAT_FMT_FLAG
/* Actually we have to write (DBL_DIG + log10 (DBL_MAX_10_EXP)) but we
don't have log10 available in the preprocessor. */
# define MAXDIG (NDIGIT_MAX + 3)
# define FCVT_MAXDIG (DBL_MAX_10_EXP + MAXDIG)
# if DBL_MANT_DIG == 53
# define NDIGIT_MAX 17
# elif DBL_MANT_DIG == 24
# define NDIGIT_MAX 9
# elif DBL_MANT_DIG == 56
# define NDIGIT_MAX 18
# else
/* See IEEE 854 5.6, table 2 for this formula. Unfortunately we need a
compile time constant here, so we cannot use it. */
# error "NDIGIT_MAX must be precomputed"
# define NDIGIT_MAX (lrint (ceil (M_LN2 / M_LN10 * DBL_MANT_DIG + 1.0)))
# endif
#else
# define LONG_DOUBLE_CVT
#endif
#define APPEND(a, b) APPEND2 (a, b)
#define APPEND2(a, b) a##b
#define __APPEND(a, b) __APPEND2 (a, b)
#define __APPEND2(a, b) __##a##b
#define FCVT_BUFFER APPEND (FUNC_PREFIX, fcvt_buffer)
#define FCVT_BUFPTR APPEND (FUNC_PREFIX, fcvt_bufptr)
#define ECVT_BUFFER APPEND (FUNC_PREFIX, ecvt_buffer)
static char FCVT_BUFFER[MAXDIG];
static char ECVT_BUFFER[MAXDIG];
libc_freeres_ptr (static char *FCVT_BUFPTR);
char *
__APPEND (FUNC_PREFIX, fcvt) (FLOAT_TYPE value, int ndigit, int *decpt,
int *sign)
{
if (FCVT_BUFPTR == NULL)
{
if (__APPEND (FUNC_PREFIX, fcvt_r) (value, ndigit, decpt, sign,
FCVT_BUFFER, MAXDIG) != -1)
return FCVT_BUFFER;
FCVT_BUFPTR = (char *) malloc (FCVT_MAXDIG);
if (FCVT_BUFPTR == NULL)
return FCVT_BUFFER;
}
(void) __APPEND (FUNC_PREFIX, fcvt_r) (value, ndigit, decpt, sign,
FCVT_BUFPTR, FCVT_MAXDIG);
return FCVT_BUFPTR;
}
char *
__APPEND (FUNC_PREFIX, ecvt) (FLOAT_TYPE value, int ndigit, int *decpt,
int *sign)
{
(void) __APPEND (FUNC_PREFIX, ecvt_r) (value, ndigit, decpt, sign,
ECVT_BUFFER, MAXDIG);
return ECVT_BUFFER;
}
char *
__APPEND (FUNC_PREFIX, gcvt) (FLOAT_TYPE value, int ndigit, char *buf)
{
sprintf (buf, "%.*" FLOAT_FMT_FLAG "g", MIN (ndigit, NDIGIT_MAX), value);
return buf;
}
#include <efgcvt-dbl-macros.h>
#include <efgcvt-template.c>
#if LONG_DOUBLE_COMPAT (libc, GLIBC_2_0)
# ifdef LONG_DOUBLE_CVT
# define cvt_symbol(symbol) \
cvt_symbol_1 (libc, __APPEND (FUNC_PREFIX, symbol), \
APPEND (FUNC_PREFIX, symbol), GLIBC_2_4)
# define cvt_symbol_1(lib, local, symbol, version) \
versioned_symbol (lib, local, symbol, version)
# else
# define cvt_symbol(symbol) \
# define cvt_symbol(symbol) \
cvt_symbol_1 (libc, __APPEND (FUNC_PREFIX, symbol), \
APPEND (q, symbol), GLIBC_2_0); \
strong_alias (__APPEND (FUNC_PREFIX, symbol), APPEND (FUNC_PREFIX, symbol))
# define cvt_symbol_1(lib, local, symbol, version) \
# define cvt_symbol_1(lib, local, symbol, version) \
compat_symbol (lib, local, symbol, version)
# endif
#else
# define cvt_symbol(symbol) \
strong_alias (__APPEND (FUNC_PREFIX, symbol), APPEND (FUNC_PREFIX, symbol))

196
misc/efgcvt_r-template.c Normal file
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@ -0,0 +1,196 @@
/* Compatibility functions for floating point formatting, reentrant versions.
Copyright (C) 1995-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <math.h>
#include <stdlib.h>
#include <sys/param.h>
#include <math_ldbl_opt.h>
#define APPEND(a, b) APPEND2 (a, b)
#define APPEND2(a, b) a##b
#define __APPEND(a, b) __APPEND2 (a, b)
#define __APPEND2(a, b) __##a##b
int
__APPEND (FUNC_PREFIX, fcvt_r) (FLOAT_TYPE value, int ndigit, int *decpt,
int *sign, char *buf, size_t len)
{
ssize_t n;
ssize_t i;
int left;
if (buf == NULL)
{
__set_errno (EINVAL);
return -1;
}
left = 0;
if (isfinite (value))
{
*sign = signbit (value) != 0;
if (*sign)
value = -value;
if (ndigit < 0)
{
/* Rounding to the left of the decimal point. */
while (ndigit < 0)
{
FLOAT_TYPE new_value = value * 0.1;
if (new_value < 1.0)
{
ndigit = 0;
break;
}
value = new_value;
++left;
++ndigit;
}
}
}
else
/* Value is Inf or NaN. */
*sign = 0;
n = __snprintf (buf, len, "%.*" FLOAT_FMT_FLAG "f", MIN (ndigit, NDIGIT_MAX),
value);
/* Check for a too small buffer. */
if (n >= (ssize_t) len)
return -1;
i = 0;
while (i < n && isdigit (buf[i]))
++i;
*decpt = i;
if (i == 0)
/* Value is Inf or NaN. */
return 0;
if (i < n)
{
do
++i;
while (i < n && !isdigit (buf[i]));
if (*decpt == 1 && buf[0] == '0' && value != 0.0)
{
/* We must not have leading zeroes. Strip them all out and
adjust *DECPT if necessary. */
--*decpt;
while (i < n && buf[i] == '0')
{
--*decpt;
++i;
}
}
memmove (&buf[MAX (*decpt, 0)], &buf[i], n - i);
buf[n - (i - MAX (*decpt, 0))] = '\0';
}
if (left)
{
*decpt += left;
if ((ssize_t) --len > n)
{
while (left-- > 0 && n < (ssize_t) len)
buf[n++] = '0';
buf[n] = '\0';
}
}
return 0;
}
int
__APPEND (FUNC_PREFIX, ecvt_r) (FLOAT_TYPE value, int ndigit, int *decpt,
int *sign, char *buf, size_t len)
{
int exponent = 0;
if (isfinite (value) && value != 0.0)
{
/* Slow code that doesn't require -lm functions. */
FLOAT_TYPE d;
FLOAT_TYPE f = 1.0;
if (value < 0.0)
d = -value;
else
d = value;
/* For denormalized numbers the d < 1.0 case below won't work,
as f can overflow to +Inf. */
if (d < FLOAT_MIN_10_NORM)
{
value /= FLOAT_MIN_10_NORM;
if (value < 0.0)
d = -value;
else
d = value;
exponent += FLOAT_MIN_10_EXP;
}
if (d < 1.0)
{
do
{
f *= 10.0;
--exponent;
}
while (d * f < 1.0);
value *= f;
}
else if (d >= 10.0)
{
do
{
f *= 10;
++exponent;
}
while (d >= f * 10.0);
value /= f;
}
}
else if (value == 0.0)
/* SUSv2 leaves it unspecified whether *DECPT is 0 or 1 for 0.0.
This could be changed to -1 if we want to return 0. */
exponent = 0;
if (ndigit <= 0 && len > 0)
{
buf[0] = '\0';
*decpt = 1;
*sign = isfinite (value) ? signbit (value) != 0 : 0;
}
else
if (__APPEND (FUNC_PREFIX, fcvt_r) (value, MIN (ndigit, NDIGIT_MAX) - 1,
decpt, sign, buf, len))
return -1;
*decpt += exponent;
return 0;
}

234
misc/efgcvt_r.c
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@ -1,4 +1,4 @@
/* Compatibility functions for floating point formatting, reentrant versions.
/* Double versions of reentrant *cvt_r functions.
Copyright (C) 1995-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
@ -16,241 +16,17 @@
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <float.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <math.h>
#include <stdlib.h>
#include <sys/param.h>
#include <math_ldbl_opt.h>
#ifndef FLOAT_TYPE
# define FLOAT_TYPE double
# define FUNC_PREFIX
# define FLOAT_FMT_FLAG
# define FLOAT_NAME_EXT
# define FLOAT_MIN_10_EXP DBL_MIN_10_EXP
# if DBL_MANT_DIG == 53
# define NDIGIT_MAX 17
# elif DBL_MANT_DIG == 24
# define NDIGIT_MAX 9
# elif DBL_MANT_DIG == 56
# define NDIGIT_MAX 18
# else
/* See IEEE 854 5.6, table 2 for this formula. Unfortunately we need a
compile time constant here, so we cannot use it. */
# error "NDIGIT_MAX must be precomputed"
# define NDIGIT_MAX (lrint (ceil (M_LN2 / M_LN10 * DBL_MANT_DIG + 1.0)))
# endif
# if DBL_MIN_10_EXP == -37
# define FLOAT_MIN_10_NORM 1.0e-37
# elif DBL_MIN_10_EXP == -307
# define FLOAT_MIN_10_NORM 1.0e-307
# elif DBL_MIN_10_EXP == -4931
# define FLOAT_MIN_10_NORM 1.0e-4931
# else
/* libc can't depend on libm. */
# error "FLOAT_MIN_10_NORM must be precomputed"
# define FLOAT_MIN_10_NORM exp10 (DBL_MIN_10_EXP)
# endif
#else
# define LONG_DOUBLE_CVT
#endif
#define APPEND(a, b) APPEND2 (a, b)
#define APPEND2(a, b) a##b
#define __APPEND(a, b) __APPEND2 (a, b)
#define __APPEND2(a, b) __##a##b
#define FLOOR APPEND(floor, FLOAT_NAME_EXT)
#define FABS APPEND(fabs, FLOAT_NAME_EXT)
#define LOG10 APPEND(log10, FLOAT_NAME_EXT)
#define EXP APPEND(exp, FLOAT_NAME_EXT)
int
__APPEND (FUNC_PREFIX, fcvt_r) (FLOAT_TYPE value, int ndigit, int *decpt,
int *sign, char *buf, size_t len)
{
ssize_t n;
ssize_t i;
int left;
if (buf == NULL)
{
__set_errno (EINVAL);
return -1;
}
left = 0;
if (isfinite (value))
{
*sign = signbit (value) != 0;
if (*sign)
value = -value;
if (ndigit < 0)
{
/* Rounding to the left of the decimal point. */
while (ndigit < 0)
{
FLOAT_TYPE new_value = value * 0.1;
if (new_value < 1.0)
{
ndigit = 0;
break;
}
value = new_value;
++left;
++ndigit;
}
}
}
else
/* Value is Inf or NaN. */
*sign = 0;
n = __snprintf (buf, len, "%.*" FLOAT_FMT_FLAG "f", MIN (ndigit, NDIGIT_MAX),
value);
/* Check for a too small buffer. */
if (n >= (ssize_t) len)
return -1;
i = 0;
while (i < n && isdigit (buf[i]))
++i;
*decpt = i;
if (i == 0)
/* Value is Inf or NaN. */
return 0;
if (i < n)
{
do
++i;
while (i < n && !isdigit (buf[i]));
if (*decpt == 1 && buf[0] == '0' && value != 0.0)
{
/* We must not have leading zeroes. Strip them all out and
adjust *DECPT if necessary. */
--*decpt;
while (i < n && buf[i] == '0')
{
--*decpt;
++i;
}
}
memmove (&buf[MAX (*decpt, 0)], &buf[i], n - i);
buf[n - (i - MAX (*decpt, 0))] = '\0';
}
if (left)
{
*decpt += left;
if ((ssize_t) --len > n)
{
while (left-- > 0 && n < (ssize_t) len)
buf[n++] = '0';
buf[n] = '\0';
}
}
return 0;
}
int
__APPEND (FUNC_PREFIX, ecvt_r) (FLOAT_TYPE value, int ndigit, int *decpt,
int *sign, char *buf, size_t len)
{
int exponent = 0;
if (isfinite (value) && value != 0.0)
{
/* Slow code that doesn't require -lm functions. */
FLOAT_TYPE d;
FLOAT_TYPE f = 1.0;
if (value < 0.0)
d = -value;
else
d = value;
/* For denormalized numbers the d < 1.0 case below won't work,
as f can overflow to +Inf. */
if (d < FLOAT_MIN_10_NORM)
{
value /= FLOAT_MIN_10_NORM;
if (value < 0.0)
d = -value;
else
d = value;
exponent += FLOAT_MIN_10_EXP;
}
if (d < 1.0)
{
do
{
f *= 10.0;
--exponent;
}
while (d * f < 1.0);
value *= f;
}
else if (d >= 10.0)
{
do
{
f *= 10;
++exponent;
}
while (d >= f * 10.0);
value /= f;
}
}
else if (value == 0.0)
/* SUSv2 leaves it unspecified whether *DECPT is 0 or 1 for 0.0.
This could be changed to -1 if we want to return 0. */
exponent = 0;
if (ndigit <= 0 && len > 0)
{
buf[0] = '\0';
*decpt = 1;
*sign = isfinite (value) ? signbit (value) != 0 : 0;
}
else
if (__APPEND (FUNC_PREFIX, fcvt_r) (value, MIN (ndigit, NDIGIT_MAX) - 1,
decpt, sign, buf, len))
return -1;
*decpt += exponent;
return 0;
}
#include <efgcvt-dbl-macros.h>
#include <efgcvt_r-template.c>
#if LONG_DOUBLE_COMPAT (libc, GLIBC_2_0)
# ifdef LONG_DOUBLE_CVT
# define cvt_symbol(symbol) \
cvt_symbol_1 (libc, __APPEND (FUNC_PREFIX, symbol), \
APPEND (FUNC_PREFIX, symbol), GLIBC_2_4)
# define cvt_symbol_1(lib, local, symbol, version) \
libc_hidden_def (local) \
versioned_symbol (lib, local, symbol, version)
# else
# define cvt_symbol(symbol) \
# define cvt_symbol(symbol) \
cvt_symbol_1 (libc, __APPEND (FUNC_PREFIX, symbol), \
APPEND (q, symbol), GLIBC_2_0); \
weak_alias (__APPEND (FUNC_PREFIX, symbol), APPEND (FUNC_PREFIX, symbol))
# define cvt_symbol_1(lib, local, symbol, version) \
# define cvt_symbol_1(lib, local, symbol, version) \
libc_hidden_def (local) \
compat_symbol (lib, local, symbol, version)
# endif
#else
# define cvt_symbol(symbol) \
cvt_symbol_1 (__APPEND (FUNC_PREFIX, symbol), APPEND (FUNC_PREFIX, symbol))

38
misc/qefgcvt.c
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@ -16,31 +16,19 @@
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <float.h>
#include <efgcvt-ldbl-macros.h>
#include <efgcvt-template.c>
#define FLOAT_TYPE long double
#define FUNC_PREFIX q
#define FLOAT_FMT_FLAG "L"
/* Actually we have to write (LDBL_DIG + log10 (LDBL_MAX_10_EXP)) but
we don't have log10 available in the preprocessor. Since we cannot
assume anything on the used `long double' format be generous. */
#define MAXDIG (NDIGIT_MAX + 12)
#define FCVT_MAXDIG (LDBL_MAX_10_EXP + MAXDIG)
#if LDBL_MANT_DIG == 64
# define NDIGIT_MAX 21
#elif LDBL_MANT_DIG == 53
# define NDIGIT_MAX 17
#elif LDBL_MANT_DIG == 113
# define NDIGIT_MAX 36
#elif LDBL_MANT_DIG == 106
# define NDIGIT_MAX 34
#elif LDBL_MANT_DIG == 56
# define NDIGIT_MAX 18
#if LONG_DOUBLE_COMPAT (libc, GLIBC_2_0)
# define cvt_symbol(symbol) \
cvt_symbol_1 (libc, __APPEND (FUNC_PREFIX, symbol), \
APPEND (FUNC_PREFIX, symbol), GLIBC_2_4)
# define cvt_symbol_1(lib, local, symbol, version) \
versioned_symbol (lib, local, symbol, version)
#else
/* See IEEE 854 5.6, table 2 for this formula. Unfortunately we need a
compile time constant here, so we cannot use it. */
# error "NDIGIT_MAX must be precomputed"
# define NDIGIT_MAX (lrint (ceil (M_LN2 / M_LN10 * LDBL_MANT_DIG + 1.0)))
# define cvt_symbol(symbol) \
strong_alias (__APPEND (FUNC_PREFIX, symbol), APPEND (FUNC_PREFIX, symbol))
#endif
#include "efgcvt.c"
cvt_symbol(fcvt);
cvt_symbol(ecvt);
cvt_symbol(gcvt);

51
misc/qefgcvt_r.c
View File

@ -17,41 +17,22 @@
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <float.h>
#include <efgcvt-ldbl-macros.h>
#include <efgcvt_r-template.c>
#define FLOAT_TYPE long double
#define FUNC_PREFIX q
#define FLOAT_FMT_FLAG "L"
#define FLOAT_NAME_EXT l
#define FLOAT_MIN_10_EXP LDBL_MIN_10_EXP
#if LDBL_MANT_DIG == 64
# define NDIGIT_MAX 21
#elif LDBL_MANT_DIG == 53
# define NDIGIT_MAX 17
#elif LDBL_MANT_DIG == 113
# define NDIGIT_MAX 36
#elif LDBL_MANT_DIG == 106
# define NDIGIT_MAX 34
#elif LDBL_MANT_DIG == 56
# define NDIGIT_MAX 18
#if LONG_DOUBLE_COMPAT (libc, GLIBC_2_0)
# define cvt_symbol(symbol) \
cvt_symbol_1 (libc, __APPEND (FUNC_PREFIX, symbol), \
APPEND (FUNC_PREFIX, symbol), GLIBC_2_4)
# define cvt_symbol_1(lib, local, symbol, version) \
libc_hidden_def (local) \
versioned_symbol (lib, local, symbol, version)
#else
/* See IEEE 854 5.6, table 2 for this formula. Unfortunately we need a
compile time constant here, so we cannot use it. */
# error "NDIGIT_MAX must be precomputed"
# define NDIGIT_MAX (lrint (ceil (M_LN2 / M_LN10 * LDBL_MANT_DIG + 1.0)))
# define cvt_symbol(symbol) \
cvt_symbol_1 (__APPEND (FUNC_PREFIX, symbol), APPEND (FUNC_PREFIX, symbol))
# define cvt_symbol_1(local, symbol) \
libc_hidden_def (local) \
weak_alias (local, symbol)
#endif
#if LDBL_MIN_10_EXP == -37
# define FLOAT_MIN_10_NORM 1.0e-37L
#elif LDBL_MIN_10_EXP == -291
# define FLOAT_MIN_10_NORM 1.0e-291L
#elif LDBL_MIN_10_EXP == -307
# define FLOAT_MIN_10_NORM 1.0e-307L
#elif LDBL_MIN_10_EXP == -4931
# define FLOAT_MIN_10_NORM 1.0e-4931L
#else
/* libc can't depend on libm. */
# error "FLOAT_MIN_10_NORM must be precomputed"
# define FLOAT_MIN_10_NORM exp10l (LDBL_MIN_10_EXP)
#endif
#include "efgcvt_r.c"
cvt_symbol(fcvt_r);
cvt_symbol(ecvt_r);