diff options
Diffstat (limited to 'manual/arith.texi')
| -rw-r--r-- | manual/arith.texi | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/manual/arith.texi b/manual/arith.texi index 078885e86f..b1580a06f5 100644 --- a/manual/arith.texi +++ b/manual/arith.texi @@ -418,7 +418,7 @@ This function returns @code{-1} if @var{x} represents negative infinity, This function returns a nonzero value if @var{x} is a ``not a number'' value, and zero otherwise. -@strong{Note:} The @code{isnan} macro defined by @w{ISO C99} overrides +@strong{NB:} The @code{isnan} macro defined by @w{ISO C99} overrides the BSD function. This is normally not a problem, because the two routines behave identically. However, if you really need to get the BSD function for some reason, you can write @@ -968,7 +968,7 @@ decide whether traps will occur for each of the exceptions, by setting bits in the @dfn{control word}. In C, traps result in the program receiving the @code{SIGFPE} signal; see @ref{Signal Handling}. -@strong{Note:} @w{IEEE 754} says that trap handlers are given details of +@strong{NB:} @w{IEEE 754} says that trap handlers are given details of the exceptional situation, and can set the result value. C signals do not provide any mechanism to pass this information back and forth. Trapping exceptions in C is therefore not very useful. @@ -1721,7 +1721,7 @@ Not all machines provide hardware support for these operations. On machines that don't, the macros can be very slow. Therefore, you should not use these functions when NaN is not a concern. -@strong{Note:} There are no macros @code{isequal} or @code{isunequal}. +@strong{NB:} There are no macros @code{isequal} or @code{isunequal}. They are unnecessary, because the @code{==} and @code{!=} operators do @emph{not} throw an exception if one or both of the operands are NaN. |