diff options
| -rw-r--r-- | CONFORMANCE | 35 | ||||
| -rw-r--r-- | ChangeLog | 7 | ||||
| -rw-r--r-- | manual/arith.texi | 2 | ||||
| -rw-r--r-- | sysdeps/ieee754/ldbl-128/s_nexttoward.c | 2 | ||||
| -rw-r--r-- | sysdeps/ieee754/ldbl-96/s_nexttoward.c | 2 |
5 files changed, 39 insertions, 9 deletions
diff --git a/CONFORMANCE b/CONFORMANCE index bfb8291..c968754 100644 --- a/CONFORMANCE +++ b/CONFORMANCE @@ -62,9 +62,11 @@ of the C standard (as indicated by __STDC_VERSION__): GCC options Standard version -ansi ISO/IEC 9899:1990 -std=c89 ISO/IEC 9899:1990 --std=iso9899:199409 ISO/IEC 9899:1990 as amended by Amd.1:1995 +-std=iso9899:199409 ISO/IEC 9899:1990 as amended by Amd.1:1995 * -std=c99 ISO/IEC 9899:1999 +* glibc does not support this standard version. + (Note that -std=c99 is not available in GCC 2.95.2, and that no version of GCC presently existing implements the full C99 standard.) @@ -127,8 +129,8 @@ library in use, so glibc defines them in <features.h>. Programs that test them before including any standard headers may misbehave. GCC doesn't support the optional imaginary types. Nor does it -understand the keyword _Complex. This has the corresponding impact on -the relevant headers. +understand the keyword _Complex before GCC 3.0. This has the +corresponding impact on the relevant headers. glibc's use of extern inline conflicts with C99: in C99, extern inline means that an external definition is generated as well as possibly an @@ -162,7 +164,28 @@ Issues with headers =================== There are various technical issues with the definitions contained in -glibc's headers. See +glibc's headers, listed below. The list below assumes current CVS GCC +as of 2000-10-08, and relates to i686-linux; older GCC may lead to +more problems in the headers. + +Note that the _t suffix is reserved by POSIX, but not by pure ISO C. +Also, the Single Unix Specification generally requires more types to +be included in headers (if _XOPEN_SOURCE is defined appropriately) +than ISO C permits. + +<ctype.h> should not declare size_t. + +<inttypes.h> should not declare wchar_t. + +<signal.h> should not declare size_t. + +<stdint.h> should not declare wchar_t. + +<stdio.h> should not declare or use wchar_t, wint_t or off_t. + +<wchar.h> does not support AMD1; to support it, the functions +fwprintf, fwscanf, wprintf, wscanf, swprintf, swscanf, vfwprintf, +vwprintf, vswprintf and fwide would need to be declared when +__STDC_VERSION__ >= 199409L and not just for C99. -http://sources.redhat.com/ml/libc-alpha/2000-07/msg00259.html -http://sources.redhat.com/ml/libc-alpha/2000-07/msg00279.html +<wctype.h> should not declare size_t. @@ -1,3 +1,10 @@ +2000-10-09 Jakub Jelinek <jakub@redhat.com> + + * sysdeps/ieee754/ldbl-128/s_nexttoward.c (__nexttoward): If x == y, + return y not x. + * manual/arith.texi (nextafter): Document it. + * sysdeps/ieee754/ldbl-96/s_nexttoward.c: Fix a comment. + 2000-10-08 Ulrich Drepper <drepper@redhat.com> * version.h (VERSION): Bump to 2.1.95. diff --git a/manual/arith.texi b/manual/arith.texi index e7f4365..1b62d76 100644 --- a/manual/arith.texi +++ b/manual/arith.texi @@ -1640,7 +1640,7 @@ false, but @code{signbit (-0.0)} will return a nonzero value. The @code{nextafter} function returns the next representable neighbor of @var{x} in the direction towards @var{y}. The size of the step between @var{x} and the result depends on the type of the result. If -@math{@var{x} = @var{y}} the function simply returns @var{x}. If either +@math{@var{x} = @var{y}} the function simply returns @var{y}. If either value is @code{NaN}, @code{NaN} is returned. Otherwise a value corresponding to the value of the least significant bit in the mantissa is added or subtracted, depending on the direction. diff --git a/sysdeps/ieee754/ldbl-128/s_nexttoward.c b/sysdeps/ieee754/ldbl-128/s_nexttoward.c index f121be2..2c654fb 100644 --- a/sysdeps/ieee754/ldbl-128/s_nexttoward.c +++ b/sysdeps/ieee754/ldbl-128/s_nexttoward.c @@ -50,7 +50,7 @@ static char rcsid[] = "$NetBSD: $"; ((iy>=0x7fff000000000000LL)&&((iy-0x7fff000000000000LL)|ly)!=0)) /* y is nan */ return x+y; - if((long double) x==y) return x; /* x=y, return x */ + if((long double) x==y) return y; /* x=y, return y */ if((ix|lx)==0) { /* x == 0 */ double x2; INSERT_WORDS(x,(u_int32_t)((hy>>32)&0x80000000),1);/* return +-minsub */ diff --git a/sysdeps/ieee754/ldbl-96/s_nexttoward.c b/sysdeps/ieee754/ldbl-96/s_nexttoward.c index 941383e..9df393a 100644 --- a/sysdeps/ieee754/ldbl-96/s_nexttoward.c +++ b/sysdeps/ieee754/ldbl-96/s_nexttoward.c @@ -19,7 +19,7 @@ static char rcsid[] = "$NetBSD: $"; #endif /* IEEE functions - * nextafterx(x,y) + * nexttoward(x,y) * return the next machine floating-point number of x in the * direction toward y. * Special cases: |