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From: Jonathan Wakely <>
Subject: [committed] libstdc++: Reuse double overload of __convert_to_v if possible
Date: Thu, 17 Aug 2023 21:32:29 +0100	[thread overview]
Message-ID: <> (raw)

Tested x86_64-linux. Pushed to trunk.

-- >8 --

For targets where double and long double have the same representation we
can reuse the same __convert_to_v code for both types. This will
slightly reduce the size of the compiled code in the library.


	* config/locale/generic/ (__convert_to_v): Reuse
	double overload for long double if possible.
 libstdc++-v3/config/locale/generic/ | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libstdc++-v3/config/locale/generic/ b/libstdc++-v3/config/locale/generic/
index 8849d78fdfa..866ba0361dc 100644
--- a/libstdc++-v3/config/locale/generic/
+++ b/libstdc++-v3/config/locale/generic/
     __convert_to_v(const char* __s, long double& __v,
 		   ios_base::iostate& __err, const __c_locale&) throw()
+#if __DBL_MANT_DIG__ == __LDBL_MANT_DIG__
+      double __d;
+      __convert_to_v(__s, __d, __err, __c_locale);
+      __v = __d;
       // Assumes __s formatted for "C" locale.
       const char* __sav = __set_C_locale();
       if (!__sav)
       setlocale(LC_ALL, __sav);
       delete [] __sav;
+#endif // __DBL_MANT_DIG__ == __LDBL_MANT_DIG__

             reply	other threads:[~2023-08-17 20:32 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-08-17 20:32 Jonathan Wakely [this message]
2023-08-17 23:19 ` Hans-Peter Nilsson
2023-08-17 23:30   ` Jonathan Wakely

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