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| author | H.J. Lu <hongjiu.lu@intel.com> | 2012-08-22 19:46:28 +0000 |
|---|---|---|
| committer | H.J. Lu <hjl@gcc.gnu.org> | 2012-08-22 12:46:28 -0700 |
| commit | c637141af07b7719c1b4c870373944929bcc34b6 (patch) | |
| tree | 236b8d81975f925b0d2373ea51609df62083694d /gcc/doc | |
| parent | a8a68bb00acf28a07497e7d233f13f4e5097d21a (diff) | |
| download | gcc-c637141af07b7719c1b4c870373944929bcc34b6.zip gcc-c637141af07b7719c1b4c870373944929bcc34b6.tar.gz gcc-c637141af07b7719c1b4c870373944929bcc34b6.tar.bz2 | |
Add -mlong-double-64/-mlong-double-80 to i386
gcc/
* 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/
* 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/
* config/i386/t-linux (HOST_LIBGCC2_CFLAGS): New.
From-SVN: r190599
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 599b0f6..5404a3c 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -636,7 +636,8 @@ Objective-C and Objective-C++ Dialects}. -mno-align-stringops -minline-all-stringops @gol -minline-stringops-dynamically -mstringop-strategy=@var{alg} @gol -mpush-args -maccumulate-outgoing-args -m128bit-long-double @gol --m96bit-long-double -mregparm=@var{num} -msseregparm @gol +-m96bit-long-double -mlong-double-64 -mlong-double-80 @gol +-mregparm=@var{num} -msseregparm @gol -mveclibabi=@var{type} -mvect8-ret-in-mem @gol -mpc32 -mpc64 -mpc80 -mstackrealign @gol -momit-leaf-frame-pointer -mno-red-zone -mno-tls-direct-seg-refs @gol @@ -13517,6 +13518,21 @@ as well as modifying the function calling convention for functions taking @code{long double}. Hence they are not binary-compatible with code compiled without that switch. +@item -mlong-double-64 +@itemx -mlong-double-80 +@opindex mlong-double-64 +@opindex mlong-double-80 +These switches control the size of @code{long double} type. A size +of 64 bits makes the @code{long double} type equivalent to the @code{double} +type. This is the default for Bionic C library. + +@strong{Warning:} if you override the default value for your target ABI, this +changes the size of +structures and arrays containing @code{long double} variables, +as well as modifying the function calling convention for functions taking +@code{long double}. Hence they are not binary-compatible +with code compiled without that switch. + @item -mlarge-data-threshold=@var{threshold} @opindex mlarge-data-threshold When @option{-mcmodel=medium} is specified, data objects larger than |