mirror of
git://gcc.gnu.org/git/gcc.git
synced 2025-04-08 22:41:28 +08:00
1e70b1a358
Instead of mapping elementary functions for all types to a single type, use the intrinsics available for the various base types. A new Ada.Numerics.Aux_Generic_Float is introduced to explicitly dispatch, based on the 'Digits attribute of the base type, to the various newly-added Aux_Short_Float, Aux_Float, Aux_Long_Float, or Aux_Long_Long_Float. The Aux_Short_Float unit is implemented in terms of the Aux_Float one, and the others rely on the elementary functions from the C Math library for float, double and long double types, respectively. An Aux_Linker_Options is added, and units that import intrinsics from libm/libc depend on it to provide the "-lm" linker option if needed. The option is provided by default, but there is an alternate version that doesn't, that is used for vxworks targets. The Aux variant that used to open-code Sin and Cos for the ancient ppc-darwin, because of insufficient precision in libc, is dropped, along with the alternate dummy body for Aux. Both are presumed no longer needed. The original Ada.Numerics.Aux is retained, for backward compatibility, as a wrapper for a newly-added Aux_Compat, that renames Aux_Long_Float, except on x86, in which an alternate version renames Aux_Long_Long_Float. Generic_Elementary_Functions and Generic_Complex_Types are adjusted to use Aux_Generic_Float, avoiding the type conversions and inefficiencies of computing results in higher precision than requested. Generic_Complex_Elementary_Functions is adjusted to enable an additional instance of the sincos optimization, even without -gnatn. for gcc/ada/ChangeLog * Makefile.rtl (GNATRTL_NONTASKING_OBJS): Compile Ada.Numerics child units Aux_Generic_Float, Aux_Long_Long_Float, Aux_Long_Float, Aux_Float, Aux_Short_Float, Aux_Compat, and Aux_Linker_Options. (X86_TARGET_PAIRS): Drop dummy body for Aux. Use x86 version of Aux_Compat. (X86_64_TARGET_PAIRS): Likewise. (LIBGNAT_TARGET_PAIRS): On VxWorks, select the nolibm variants. Drop the darwin version of Aux. Drop the redundant libc-x86 numaux variants on x86* kfreebsd variants. * libgnat/a-nagefl.ads: New Aux_Generic_Float. * libgnat/a-naliop.ads: New Aux_Linker_Options. * libgnat/a-naliop__nolibm.ads: New. * libgnat/a-nallfl.ads: New Aux_Long_Long_Float. * libgnat/a-nalofl.ads: New Aux_Long_Float. * libgnat/a-nuaufl.ads: New Aux_Float. * libgnat/a-nashfl.ads: New Aux_Short_Float. * libgnat/a-ngcefu.adb (Exp): Factor out the Im (X) passed to Sin and Cos in the Complex variant too. * libgnat/a-ngcoty.adb: Switch to Aux_Generic_Float. Drop redundant conversions. * libgnat/a-ngelfu.adb: Likewise. * libgnat/a-nuauco.ads: New Aux_Compat. * libgnat/a-nuauco__x86.ads: New. * libgnat/a-numaux.ads: Replace with Compat wrapper. * libgnat/a-numaux__darwin.adb: Remove. * libgnat/a-numaux__darwin.ads: Remove. * libgnat/a-numaux__dummy.adb: Remove. * libgnat/a-numaux__libc-x86.ads: Remove. * libgnat/a-numaux__vxworks.ads: Remove.
This directory contains the GNU Compiler Collection (GCC). The GNU Compiler Collection is free software. See the files whose names start with COPYING for copying permission. The manuals, and some of the runtime libraries, are under different terms; see the individual source files for details. The directory INSTALL contains copies of the installation information as HTML and plain text. The source of this information is gcc/doc/install.texi. The installation information includes details of what is included in the GCC sources and what files GCC installs. See the file gcc/doc/gcc.texi (together with other files that it includes) for usage and porting information. An online readable version of the manual is in the files gcc/doc/gcc.info*. See http://gcc.gnu.org/bugs/ for how to report bugs usefully. Copyright years on GCC source files may be listed using range notation, e.g., 1987-2012, indicating that every year in the range, inclusive, is a copyrightable year that could otherwise be listed individually.