This is the mail archive of the
gcc-patches@gcc.gnu.org
mailing list for the GCC project.
Re: PATCH: Default to 64-bit long double for Bionic/x86
- From: Uros Bizjak <ubizjak at gmail dot com>
- To: "H.J. Lu" <hjl dot tools at gmail dot com>
- Cc: gcc-patches at gcc dot gnu dot org, Maxim Kuvyrkov <maxim at codesourcery dot com>
- Date: Wed, 22 Aug 2012 20:40:47 +0200
- Subject: Re: PATCH: Default to 64-bit long double for Bionic/x86
- References: <20120822144141.GA6489@intel.com>
On Wed, Aug 22, 2012 at 4:41 PM, H.J. Lu <hongjiu.lu@intel.com> wrote:
> Long double is the same as double in Bionic. This patch
>
> 1. Add -mlong-double-80:
> 80-bit long double
> Enabled for Linux by default.
> 2. Add -mlong-double-64:
> 64-bit long double
> Predefine a new C/C++ macro, __LONG_DOUBLE_64__.
> Enabled for Android by default.
>
> __float80 can still be used for 80-bit long double. Tested on Linux/x86
> and Android/x86. OK to install?
>
> 2012-08-22 H.J. Lu <hongjiu.lu@intel.com>
>
> * doc/invoke.texi: Document -mlong-double-64/-mlong-double-80.
>
> * config/i386/i386.c (flag_opts): Add -mlong-double-64.
> (TARGET_HAS_BIONIC): Default long double to 64-bit for Bionic.
>
> * config/i386/i386.h (LONG_DOUBLE_TYPE_SIZE): Use 64 if
> TARGET_LONG_DOUBLE_64 is true.
> (LIBGCC2_LONG_DOUBLE_TYPE_SIZE): New macro.
> (WIDEST_HARDWARE_FP_SIZE): Defined to 80.
>
> * config/i386/i386.opt (mlong-double-80): New option.
> (mlong-double-64): Likewise.
>
> * config/i386/i386-c.c (ix86_target_macros): Define
> __LONG_DOUBLE_64__ for TARGET_LONG_DOUBLE_64.
>
> gcc/testsuite/
>
> 2012-08-22 H.J. Lu <hongjiu.lu@intel.com>
>
> * gcc.target/i386/long-double-64-1.c: New file.
> * gcc.target/i386/long-double-64-2.c: Likewise.
> * gcc.target/i386/long-double-64-3.c: Likewise.
> * gcc.target/i386/long-double-64-4.c: Likewise.
> * gcc.target/i386/long-double-80-1.c: Likewise.
> * gcc.target/i386/long-double-80-2.c: Likewise.
> * gcc.target/i386/long-double-80-3.c: Likewise.
> * gcc.target/i386/long-double-80-4.c: Likewise.
> * gcc.target/i386/long-double-80-5.c: Likewise.
> * gcc.target/i386/long-double-80-6.c: Likewise.
> * gcc.target/i386/long-double-80-7.c: Likewise.
>
> libgcc/
>
> 2012-08-22 H.J. Lu <hongjiu.lu@intel.com>
>
> * config/i386/t-linux (HOST_LIBGCC2_CFLAGS): New.
OK.
Thanks,
Uros.