[PATCH] manual: clarify defintions of floating point exponent bounds (bug 31518)
Carlos O'Donell
carlos@redhat.com
Fri May 17 13:58:02 GMT 2024
On 5/8/24 11:01 AM, Andreas Schwab wrote:
> For decimal exponent bounds the range is inclusive, for binary exponent
> bounds the range is exclusive.
LGTM.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
> ---
> manual/lang.texi | 10 +++++-----
> 1 file changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/manual/lang.texi b/manual/lang.texi
> index 40cd9ddd77..cd90ff60d2 100644
> --- a/manual/lang.texi
> +++ b/manual/lang.texi
> @@ -1065,7 +1065,7 @@ macros are supposed to be at least @code{10}.
> @standards{C90, float.h}
> This is the smallest possible exponent value for type @code{float}.
> More precisely, it is the minimum negative integer such that the value
> -@code{FLT_RADIX} raised to this power minus 1 can be represented as a
> +@code{FLT_RADIX} raised to one less than this power can be represented as a
OK. Aligns with ISO C wording.
> normalized floating point number of type @code{float}.
>
> @item DBL_MIN_EXP
> @@ -1078,7 +1078,7 @@ These are similar to @code{FLT_MIN_EXP}, but for the data types
> @item FLT_MIN_10_EXP
> @standards{C90, float.h}
> This is the minimum negative integer such that @code{10} raised to this
> -power minus 1 can be represented as a normalized floating point number
> +power can be represented as a normalized floating point number
OK. Correct, there should be no "minus 1" here in the definition.
> of type @code{float}. This is supposed to be @code{-37} or even less.
>
> @item DBL_MIN_10_EXP
> @@ -1091,8 +1091,8 @@ These are similar to @code{FLT_MIN_10_EXP}, but for the data types
> @standards{C90, float.h}
> This is the largest possible exponent value for type @code{float}. More
> precisely, this is the maximum positive integer such that value
> -@code{FLT_RADIX} raised to this power minus 1 can be represented as a
> -floating point number of type @code{float}.
> +@code{FLT_RADIX} raised to one less than this power can be represented as a
> +finite floating point number of type @code{float}.
OK. Aligns FLT_MAX_EXP to ISO C wording.
>
> @item DBL_MAX_EXP
> @itemx LDBL_MAX_EXP
> @@ -1103,7 +1103,7 @@ These are similar to @code{FLT_MAX_EXP}, but for the data types
> @item FLT_MAX_10_EXP
> @standards{C90, float.h}
> This is the maximum positive integer such that @code{10} raised to this
> -power minus 1 can be represented as a normalized floating point number
> +power can be represented as a finite floating point number
OK. Correct, there should be no "minus 1" here in the definition.
> of type @code{float}. This is supposed to be at least @code{37}.
>
> @item DBL_MAX_10_EXP
--
Cheers,
Carlos.
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