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| author | Paul E. Murphy <murphyp@linux.vnet.ibm.com> | 2020-02-14 16:41:11 -0600 |
|---|---|---|
| committer | Paul E. Murphy <murphyp@linux.vnet.ibm.com> | 2020-04-30 08:52:08 -0500 |
| commit | e2239af353b053b9c645e396b13bce8688f9d615 (patch) | |
| tree | b4bcb6aa914181703a211dcf3cf6a7aa52107670 /bits/long-double.h | |
| parent | 86005fdbf40d6fc84d84c824d75c656e7c1398e3 (diff) | |
| download | glibc-e2239af353b053b9c645e396b13bce8688f9d615.zip glibc-e2239af353b053b9c645e396b13bce8688f9d615.tar.gz glibc-e2239af353b053b9c645e396b13bce8688f9d615.tar.bz2 | |
Rename __LONG_DOUBLE_USES_FLOAT128 to __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI
Improve the commentary to aid future developers who will stumble
upon this novel, yet not always perfect, mechanism to support
alternative formats for long double.
Likewise, rename __LONG_DOUBLE_USES_FLOAT128 to
__LDOUBLE_REDIRECTS_TO_FLOAT128_ABI now that development work
has settled down. The command used was
git grep -l __LONG_DOUBLE_USES_FLOAT128 ':!./ChangeLog*' | \
xargs sed -i 's/__LONG_DOUBLE_USES_FLOAT128/__LDOUBLE_REDIRECTS_TO_FLOAT128_ABI/g'
Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
Diffstat (limited to 'bits/long-double.h')
| -rw-r--r-- | bits/long-double.h | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/bits/long-double.h b/bits/long-double.h index 6e16447..bdde78f 100644 --- a/bits/long-double.h +++ b/bits/long-double.h @@ -37,4 +37,17 @@ #ifndef __NO_LONG_DOUBLE_MATH # define __NO_LONG_DOUBLE_MATH 1 #endif -#define __LONG_DOUBLE_USES_FLOAT128 0 + +/* The macro __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI is used to determine the + choice of the underlying ABI of long double. It will always assume + a constant value for each translation unit. + + If the value is non-zero, any API which is parameterized by the long + double type (i.e the scanf/printf family of functions or the explicitly + parameterized math.h functions) will be redirected to a compatible + implementation using _Float128 ABI via symbols suffixed with ieee128. + + The mechanism this macro uses to acquire may be a function + of architecture, or target specific options used to invoke the + compiler. */ +#define __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI 0 |