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Re: gcc/libstdc++-v3 ChangeLog configure.target co ...
- From: Richard Earnshaw <rearnsha at arm dot com>
- To: Gabriel Dos Reis <gdr at integrable-solutions dot net>
- Cc: rearnsha at gcc dot gnu dot org, gcc at gcc dot gnu dot org, libstdc++ at gcc dot gnu dot org
- Date: Thu, 29 Aug 2002 10:48:02 +0100
- Subject: Re: gcc/libstdc++-v3 ChangeLog configure.target co ...
- Organization: ARM Ltd.
- Reply-to: Richard dot Earnshaw at arm dot com
> | Log message:
> | * config/cpu/arm/cpu_limits.h: New file.
> | * configure.target: Use config/cpu/arm for XScale and StrongARM
> | configurations.
>
> Hi Richard,
>
> We're no longer using __glibcpp_long_double_bits in C++'s <limits>.
> We're getting that info from the compiler through __LONG_DOUBLE_BIT__.
Argh! Extended build cycle times...
> However, what would be helpful is means to know whether a floating
> point type uses a hidden bit. For a 32-bit or 64-bit wide
> floating-point type, that is a non-issue. However, practice varies
> greatly for the extended floating-point types.
The ARM ABI doesn't use an extended type for long double, it maps directly
onto double. That is
long double === double
R.