From f65fd747b440ae2d8a7481ecc50e668c5e4d0cc9 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Sun, 8 Dec 1996 08:01:13 +0000 Subject: update from main archive 961207 Sun Dec 8 06:56:49 1996 Ulrich Drepper * io/getwd.c: Use PATH_MAX not LOCAL_PATH_MAX. Fix typo in comment. * stdlib/canonicalize.c: Correct bugs in last change. Patch by HJ Lu. * libio/Makefile (routines): Remove ioprims. (aux): Remove cleanup. Add IO_DEBUG option for .o files. * libio/cleanups.c: Removed. * libio/ioprims.c: Removed. * libio/filedoalloc.c: More updates from libg++-2.8b5. * libio/fileops.c: Likewise. * libio/genops.c: Likewise. * libio/iolibio.h: Likewise. * libio/iopopen.c: Likewise. * libio/iovsprintf.c: Likewise. * libio/iovsscanf.c: Likewise. * libio/libio.h: Likewise. * libio/libioP.h: Likewise. * libio/memstream.c: Likewise. * libio/strfile.h: Likewise. * libio/vasprintf.c: Likewise. * libio/vsnprintf.c: Likewise. * libio/stdio.h: Define P_tmpdir only is __USE_SVID. * manual/arith.texi: Change references to ANSI C to ISO C. * manual/conf.texi: Likewise. * manual/creature.texi: Likewise. * manual/ctype.texi: Likewise. * manual/errno.texi: Likewise. * manual/filesys.texi: Likewise. * manual/intro.texi. Likewise. * manual/io.texi: Likewise. * manual/lang.texi: Likewise. * manual/libc.texinfo: Likewise. * manual/locale.texi: Likewise. * manual/maint.texi: Likewise. * manual/mbyte.texi: Likewise. * manual/memory.texi: Likewise. * manual/process.texi: Likewise. * manual/process.texi: Likewise. * manual/search.texi: Likewise. * manual/setjmp.texi: Likewise. * manual/signal.texi: Likewise. * manual/startup.texi: Likewise. * manual/stdio.texi: Likewise. * manual/string.texi: Likewise. * manual/time.texi: Likewise. * manual/locale.texi: Remove description of LC_RESPONSE and add LC_MESSAGES. * Makefile (subdirs): Change malloc in $(malloc). * config.make.in: Add variable malloc which is initialized from @malloc@. * configure.in: Add new option --enable-new-malloc to use new malloc. This is the default on Linux. * sysdeps/unix/sysv/linux/configure.in: Define malloc to new-malloc by default. * new-malloc/Makefile: New file. Improved malloc implementation. * new-malloc/malloc.c: Likewise. * new-malloc/malloc.h: Likewise. * new-malloc/mallocbug.c: Likewise. * new-malloc/obstack.c: Likewise. * new-malloc/obstack.h: Likewise. * new-malloc/thread-m.h: Likewise. * time/Makefile: Compile ap.c with NO_MCHECK flag for now. * time/ap.c: Don't call mcheck if NO_MCHECK is defined. * resolv/Makefile: Add rule to rebuiild libresolv.so when libc.so changed. * stdio/feof.c: Update copyright. * stdio/stdio.h: Add field for lock to FILE structure. Add cast to *MAGIC constants to prevent warnings. * stdio-common/bug7.c: Correct test. Stream must not be closed twice. * stdlib/Makefile (routines): Add secure-getenv. * stdlib/secure-getenv.c: New file. __secure_getenv function moved to here from sysdeps/generic/getenv.c. Otherwise an application cannot replace the getenv function in the libc. * sysdeps/generic/getenv.c: Remove __secure_getenv function. * sysdeps/stub/getenv.c: Remove __secure_getenv alias. * sysdeps/mach/libc-lock.h: Define__libc_mutex_lock to __mutex_lock. * sysdeps/posix/fdopen.c: Update copyright. Don't use EXFUN. * time/test-tz.c: Comment fifth test out. PROBLEM. * time/tzset.c: De-ANSI-declfy. (__tzset): Don't increment pointer tz when no DST information is given. Sat Dec 7 23:47:54 1996 Ulrich Drepper * sysdeps/mach/libc-lock.h [_LIBC]: Add definition of __libc_mutex_lock. Patch by Thomas Bushnell. * sysdeps/unix/sysv/linux/timebits.h: Load only if __USE_MISC. * sysdeps/unix/sysv/linux/Dist: Add llseek.c. Sat Dec 7 12:18:56 1996 Ulrich Drepper * time/strftime (%c format): Remove %Z from default string. Reported by Paul Eggert * io/getwd.c: Don't apply getcwd on user supplied buffer. --- manual/=float.texinfo | 72 +++++++++++++++++++++++++-------------------------- 1 file changed, 35 insertions(+), 37 deletions(-) (limited to 'manual/=float.texinfo') diff --git a/manual/=float.texinfo b/manual/=float.texinfo index a8c901542e..d4e3920f8c 100644 --- a/manual/=float.texinfo +++ b/manual/=float.texinfo @@ -1,4 +1,4 @@ -@node Floating-Point Limits +@node Floating-Point Limits @chapter Floating-Point Limits @pindex @cindex floating-point number representation @@ -75,7 +75,7 @@ unsigned quantity. @cindex mantissa (of floating-point number) @cindex significand (of floating-point number) -@item +@item The @dfn{precision} of the mantissa. If the base of the representation is @var{b}, then the precision is the number of base-@var{b} digits in the mantissa. This is a constant for the particular representation. @@ -124,14 +124,14 @@ expression, so the other macros listed here cannot be reliably used in places that require constant expressions, such as @samp{#if} preprocessing directives and array size specifications. -Although the ANSI C standard specifies minimum and maximum values for +Although the @w{ISO C} standard specifies minimum and maximum values for most of these parameters, the GNU C implementation uses whatever floating-point representations are supported by the underlying hardware. -So whether GNU C actually satisfies the ANSI C requirements depends on +So whether GNU C actually satisfies the @w{ISO C} requirements depends on what machine it is running on. @comment float.h -@comment ANSI +@comment ISO @defvr Macro FLT_ROUNDS This value characterizes the rounding mode for floating-point addition. The following values indicate standard rounding modes: @@ -155,7 +155,7 @@ mode. @end defvr @comment float.h -@comment ANSI +@comment ISO @defvr Macro FLT_RADIX This is the value of the base, or radix, of exponent representation. This is guaranteed to be a constant expression, unlike the other macros @@ -163,28 +163,28 @@ described in this section. @end defvr @comment float.h -@comment ANSI +@comment ISO @defvr Macro FLT_MANT_DIG This is the number of base-@code{FLT_RADIX} digits in the floating-point mantissa for the @code{float} data type. @end defvr @comment float.h -@comment ANSI +@comment ISO @defvr Macro DBL_MANT_DIG This is the number of base-@code{FLT_RADIX} digits in the floating-point mantissa for the @code{double} data type. @end defvr @comment float.h -@comment ANSI +@comment ISO @defvr Macro LDBL_MANT_DIG This is the number of base-@code{FLT_RADIX} digits in the floating-point mantissa for the @code{long double} data type. @end defvr @comment float.h -@comment ANSI +@comment ISO @defvr Macro FLT_DIG This is the number of decimal digits of precision for the @code{float} data type. Technically, if @var{p} and @var{b} are the precision and @@ -198,14 +198,14 @@ The value of this macro is guaranteed to be at least @code{6}. @end defvr @comment float.h -@comment ANSI +@comment ISO @defvr Macro DBL_DIG This is similar to @code{FLT_DIG}, but is for the @code{double} data type. The value of this macro is guaranteed to be at least @code{10}. @end defvr @comment float.h -@comment ANSI +@comment ISO @defvr Macro LDBL_DIG This is similar to @code{FLT_DIG}, but is for the @code{long double} data type. The value of this macro is guaranteed to be at least @@ -213,7 +213,7 @@ data type. The value of this macro is guaranteed to be at least @end defvr @comment float.h -@comment ANSI +@comment ISO @defvr Macro FLT_MIN_EXP This is the minimum negative integer such that the mathematical value @code{FLT_RADIX} raised to this power minus 1 can be represented as a @@ -223,21 +223,21 @@ represented in the exponent field of the number. @end defvr @comment float.h -@comment ANSI +@comment ISO @defvr Macro DBL_MIN_EXP This is similar to @code{FLT_MIN_EXP}, but is for the @code{double} data type. @end defvr @comment float.h -@comment ANSI +@comment ISO @defvr Macro LDBL_MIN_EXP This is similar to @code{FLT_MIN_EXP}, but is for the @code{long double} data type. @end defvr @comment float.h -@comment ANSI +@comment ISO @defvr Macro FLT_MIN_10_EXP This is the minimum negative integer such that the mathematical value @code{10} raised to this power minus 1 can be represented as a @@ -246,14 +246,14 @@ guaranteed to be no greater than @code{-37}. @end defvr @comment float.h -@comment ANSI +@comment ISO @defvr Macro DBL_MIN_10_EXP This is similar to @code{FLT_MIN_10_EXP}, but is for the @code{double} data type. @end defvr @comment float.h -@comment ANSI +@comment ISO @defvr Macro LDBL_MIN_10_EXP This is similar to @code{FLT_MIN_10_EXP}, but is for the @code{long double} data type. @@ -262,7 +262,7 @@ double} data type. @comment float.h -@comment ANSI +@comment ISO @defvr Macro FLT_MAX_EXP This is the maximum negative integer such that the mathematical value @code{FLT_RADIX} raised to this power minus 1 can be represented as a @@ -272,21 +272,21 @@ in the exponent field of the number. @end defvr @comment float.h -@comment ANSI +@comment ISO @defvr Macro DBL_MAX_EXP This is similar to @code{FLT_MAX_EXP}, but is for the @code{double} data type. @end defvr @comment float.h -@comment ANSI +@comment ISO @defvr Macro LDBL_MAX_EXP This is similar to @code{FLT_MAX_EXP}, but is for the @code{long double} data type. @end defvr @comment float.h -@comment ANSI +@comment ISO @defvr Macro FLT_MAX_10_EXP This is the maximum negative integer such that the mathematical value @code{10} raised to this power minus 1 can be represented as a @@ -295,14 +295,14 @@ guaranteed to be at least @code{37}. @end defvr @comment float.h -@comment ANSI +@comment ISO @defvr Macro DBL_MAX_10_EXP This is similar to @code{FLT_MAX_10_EXP}, but is for the @code{double} data type. @end defvr @comment float.h -@comment ANSI +@comment ISO @defvr Macro LDBL_MAX_10_EXP This is similar to @code{FLT_MAX_10_EXP}, but is for the @code{long double} data type. @@ -310,7 +310,7 @@ double} data type. @comment float.h -@comment ANSI +@comment ISO @defvr Macro FLT_MAX The value of this macro is the maximum representable floating-point number of type @code{float}, and is guaranteed to be at least @@ -318,7 +318,7 @@ number of type @code{float}, and is guaranteed to be at least @end defvr @comment float.h -@comment ANSI +@comment ISO @defvr Macro DBL_MAX The value of this macro is the maximum representable floating-point number of type @code{double}, and is guaranteed to be at least @@ -326,7 +326,7 @@ number of type @code{double}, and is guaranteed to be at least @end defvr @comment float.h -@comment ANSI +@comment ISO @defvr Macro LDBL_MAX The value of this macro is the maximum representable floating-point number of type @code{long double}, and is guaranteed to be at least @@ -335,7 +335,7 @@ number of type @code{long double}, and is guaranteed to be at least @comment float.h -@comment ANSI +@comment ISO @defvr Macro FLT_MIN The value of this macro is the minimum normalized positive floating-point number that is representable by type @code{float}, and is @@ -343,7 +343,7 @@ guaranteed to be no more than @code{1E-37}. @end defvr @comment float.h -@comment ANSI +@comment ISO @defvr Macro DBL_MIN The value of this macro is the minimum normalized positive floating-point number that is representable by type @code{double}, and @@ -351,7 +351,7 @@ is guaranteed to be no more than @code{1E-37}. @end defvr @comment float.h -@comment ANSI +@comment ISO @defvr Macro LDBL_MIN The value of this macro is the minimum normalized positive floating-point number that is representable by type @code{long double}, @@ -360,7 +360,7 @@ and is guaranteed to be no more than @code{1E-37}. @comment float.h -@comment ANSI +@comment ISO @defvr Macro FLT_EPSILON This is the minimum positive floating-point number of type @code{float} such that @code{1.0 + FLT_EPSILON != 1.0} is true. It's guaranteed to @@ -368,14 +368,14 @@ be no greater than @code{1E-5}. @end defvr @comment float.h -@comment ANSI +@comment ISO @defvr Macro DBL_EPSILON This is similar to @code{FLT_EPSILON}, but is for the @code{double} type. The maximum value is @code{1E-9}. @end defvr @comment float.h -@comment ANSI +@comment ISO @defvr Macro LDBL_EPSILON This is similar to @code{FLT_EPSILON}, but is for the @code{long double} type. The maximum value is @code{1E-9}. @@ -388,7 +388,8 @@ type. The maximum value is @code{1E-9}. Here is an example showing how these parameters work for a common floating point representation, specified by the @cite{IEEE Standard for -Binary Floating-Point Arithmetic (ANSI/IEEE Std 754-1985)}. +Binary Floating-Point Arithmetic (ANSI/IEEE Std 754-1985 or ANSI/IEEE +Std 854-1987)}. The IEEE single-precision float representation uses a base of 2. There is a sign bit, a mantissa with 23 bits plus one hidden bit (so the total @@ -411,6 +412,3 @@ FLT_MIN 1.17549435E-38F FLT_MAX 3.40282347E+38F FLT_EPSILON 1.19209290E-07F @end example - - - -- cgit 1.4.1