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Remove LIBGCC2_TF_CEXT target macro.

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This patch removes the (undocumented) LIBGCC2_TF_CEXT target macro,
replacing it by -fbuilding-libgcc predefines (and thereby gets rid of
another LIBGCC2_LONG_DOUBLE_TYPE_SIZE conditional, though some more
patches are needed before that target macro can be eliminated).  This
macro indicated the suffix used on __builtin_huge_val,
__builtin_copysign, __builtin_fabs built-in function names to produce
the names for a given floating-point mode.

Predefines are added for all floating-point modes supported for
libgcc, not just TFmode.  These are fully accurate for modes
corresponding to float, double and long double.  For other modes, the
suffix for *constants* is determined by the targetm.c.mode_for_suffix
hook (the limit to two possible suffixes 'w' and 'q' being hardcoded
in various places).  This is in fact the suffix for built-in functions
as well where such functions exist.

* For i386, the *q functions always exist (whether or not TFmode is
  used for long double).  The *w functions never exist (but this
  doesn't matter for libgcc, since no i386 configuration treats XFmode
  as a supported scalar mode if long double is TFmode; if __float80
  were to be supported for 64-bit Android, properly such functions
  ought to be added).

* For ia64, the *q functions exist for non-HP-UX (under HP-UX, long
  double is TFmode, so they aren't needed).  The *w functions never
  exist.  This is an issue for this libgcc code for the XFmode complex
  functions in libgcc on HP-UX; as I understand it, right now those
  will accidentally be using TFmode versions of those three functions,
  so involving unnecessary conversions, while the sanity check on CEXT
  accidentally passes because all it tests is the sizes of the types.

Because of the lack of 'w' functions, the patch uses 'l' when the
constant suffix is 'w', matching what the existing libgcc code would
do for IA64 HP-UX in that case.

Ideally there would be generic code to create such built-in functions
for all supported floating-point types.  That may be something to
consider if support for TS 18661-3 (standard bindings for IEEE
754-2008, defining names such as _Float128, and function names such as
copysignf128) is added in future.

Bootstrapped with no regressions on x86_64-unknown-linux-gnu.

gcc:
	* system.h (LIBGCC2_TF_CEXT): Poison.
	* config/i386/cygming.h (LIBGCC2_TF_CEXT): Remove.
	* config/i386/darwin.h (LIBGCC2_TF_CEXT): Likewise.
	* config/i386/dragonfly.h (LIBGCC2_TF_CEXT): Likewise.
	* config/i386/freebsd.h (LIBGCC2_TF_CEXT): Likewise.
	* config/i386/gnu-user-common.h (LIBGCC2_TF_CEXT): Likewise.
	* config/i386/openbsdelf.h (LIBGCC2_TF_CEXT): Likewise.
	* config/i386/sol2.h (LIBGCC2_TF_CEXT): Likewise.
	* config/ia64/ia64.h (LIBGCC2_TF_CEXT): Likewise.
	* config/ia64/linux.h (LIBGCC2_TF_CEXT): Likewise.

gcc/c-family:
	* c-cppbuiltin.c (c_cpp_builtins): Define __LIBGCC_*_FUNC_EXT__
	for supported floating-point modes.

libgcc:
	* libgcc2.c (CEXT): Define using __LIBGCC_*_FUNC_EXT__.

From-SVN: r215368
This commit is contained in:
Joseph Myers 2014-09-19 00:27:26 +01:00 committed by Joseph Myers
parent f1717f8df9
commit dd69f0471d
15 changed files with 49 additions and 38 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
gcc/ChangeLog
View File

@ -1,3 +1,16 @@
2014-09-18 Joseph Myers <joseph@codesourcery.com>
* system.h (LIBGCC2_TF_CEXT): Poison.
* config/i386/cygming.h (LIBGCC2_TF_CEXT): Remove.
* config/i386/darwin.h (LIBGCC2_TF_CEXT): Likewise.
* config/i386/dragonfly.h (LIBGCC2_TF_CEXT): Likewise.
* config/i386/freebsd.h (LIBGCC2_TF_CEXT): Likewise.
* config/i386/gnu-user-common.h (LIBGCC2_TF_CEXT): Likewise.
* config/i386/openbsdelf.h (LIBGCC2_TF_CEXT): Likewise.
* config/i386/sol2.h (LIBGCC2_TF_CEXT): Likewise.
* config/ia64/ia64.h (LIBGCC2_TF_CEXT): Likewise.
* config/ia64/linux.h (LIBGCC2_TF_CEXT): Likewise.
2014-09-19 Kito Cheng <kito@0xlab.org>
* except.h: Fix header guard.

5
gcc/c-family/ChangeLog
View File

@ -1,3 +1,8 @@
2014-09-18 Joseph Myers <joseph@codesourcery.com>
* c-cppbuiltin.c (c_cpp_builtins): Define __LIBGCC_*_FUNC_EXT__
for supported floating-point modes.
2014-09-15 Manuel López-Ibáñez <manu@gcc.gnu.org>
* c.opt (Wpsabi): Use LangEnabledBy.

22
gcc/c-family/c-cppbuiltin.c
View File

@ -956,6 +956,28 @@ c_cpp_builtins (cpp_reader *pfile)
+ sizeof ("__LIBGCC_HAS__MODE__"));
sprintf (macro_name, "__LIBGCC_HAS_%s_MODE__", name);
cpp_define (pfile, macro_name);
macro_name = (char *) alloca (strlen (name)
+ sizeof ("__LIBGCC__FUNC_EXT__"));
sprintf (macro_name, "__LIBGCC_%s_FUNC_EXT__", name);
const char *suffix;
if (mode == TYPE_MODE (double_type_node))
suffix = "";
else if (mode == TYPE_MODE (float_type_node))
suffix = "f";
else if (mode == TYPE_MODE (long_double_type_node))
suffix = "l";
/* ??? The following assumes the built-in functions (defined
in target-specific code) match the suffixes used for
constants. Because in fact such functions are not
defined for the 'w' suffix, 'l' is used there
instead. */
else if (mode == targetm.c.mode_for_suffix ('q'))
suffix = "q";
else if (mode == targetm.c.mode_for_suffix ('w'))
suffix = "l";
else
gcc_unreachable ();
builtin_define_with_value (macro_name, suffix, 0);
}
/* For libgcc crtstuff.c and libgcc2.c. */

3
gcc/config/i386/cygming.h
View File

@ -339,9 +339,6 @@ do { \
#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
/* Put all *tf routines in libgcc. */
#define LIBGCC2_TF_CEXT q
/* Output function declarations at the end of the file. */
#undef TARGET_ASM_FILE_END
#define TARGET_ASM_FILE_END i386_pe_file_end

3
gcc/config/i386/darwin.h
View File

@ -153,9 +153,6 @@ extern int darwin_emit_branch_islands;
#define SHIFT_DOUBLE_OMITS_COUNT 0
/* Put all *tf routines in libgcc. */
#define LIBGCC2_TF_CEXT q
#undef TARGET_ASM_FILE_END
#define TARGET_ASM_FILE_END darwin_file_end

3
gcc/config/i386/dragonfly.h
View File

@ -89,9 +89,6 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
#undef TARGET_96_ROUND_53_LONG_DOUBLE
#define TARGET_96_ROUND_53_LONG_DOUBLE (!TARGET_64BIT)
/* Put all *tf routines in libgcc. */
#define LIBGCC2_TF_CEXT q
/* Static stack checking is supported by means of probes. */
#define STACK_CHECK_STATIC_BUILTIN 1

3
gcc/config/i386/freebsd.h
View File

@ -131,9 +131,6 @@ along with GCC; see the file COPYING3. If not see
#undef TARGET_96_ROUND_53_LONG_DOUBLE
#define TARGET_96_ROUND_53_LONG_DOUBLE (!TARGET_64BIT)
/* Put all *tf routines in libgcc. */
#define LIBGCC2_TF_CEXT q
/* Static stack checking is supported by means of probes. */
#define STACK_CHECK_STATIC_BUILTIN 1

3
gcc/config/i386/gnu-user-common.h
View File

@ -57,9 +57,6 @@ along with GCC; see the file COPYING3. If not see
GNU_USER_TARGET_MATHFILE_SPEC " " \
GNU_USER_TARGET_ENDFILE_SPEC
/* Put all *tf routines in libgcc. */
#define LIBGCC2_TF_CEXT q
#define TARGET_ASM_FILE_END file_end_indicate_exec_stack
/* The stack pointer needs to be moved while checking the stack. */

3
gcc/config/i386/openbsdelf.h
View File

@ -111,6 +111,3 @@ along with GCC; see the file COPYING3. If not see
#define OBSD_HAS_CORRECT_SPECS
#define HAVE_ENABLE_EXECUTE_STACK
/* Put all *tf routines in libgcc. */
#define LIBGCC2_TF_CEXT q

3
gcc/config/i386/sol2.h
View File

@ -236,6 +236,3 @@ along with GCC; see the file COPYING3. If not see
#ifndef USE_GLD
#define USE_HIDDEN_LINKONCE 0
#endif
/* Put all *tf routines in libgcc. */
#define LIBGCC2_TF_CEXT q

3
gcc/config/ia64/ia64.h
View File

@ -258,9 +258,6 @@ while (0)
#define LIBGCC2_LONG_DOUBLE_TYPE_SIZE (TARGET_ABI_OPEN_VMS ? 64 : 80)
/* On HP-UX, we use the l suffix for TFmode in libgcc2.c. */
#define LIBGCC2_TF_CEXT l
#define DEFAULT_SIGNED_CHAR 1
/* A C expression for a string describing the name of the data type to use for

4
gcc/config/ia64/linux.h
View File

@ -76,10 +76,6 @@ do { \
#undef LINK_EH_SPEC
#define LINK_EH_SPEC ""
/* Put all *tf routines in libgcc. */
#undef LIBGCC2_TF_CEXT
#define LIBGCC2_TF_CEXT q
#undef TARGET_INIT_LIBFUNCS
#define TARGET_INIT_LIBFUNCS ia64_soft_fp_init_libfuncs

2
gcc/system.h
View File

@ -936,7 +936,7 @@ extern void fancy_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
EXTRA_CONSTRAINT_STR EXTRA_MEMORY_CONSTRAINT \
EXTRA_ADDRESS_CONSTRAINT CONST_DOUBLE_OK_FOR_CONSTRAINT_P \
CALLER_SAVE_PROFITABLE LARGEST_EXPONENT_IS_NORMAL \
ROUND_TOWARDS_ZERO SF_SIZE DF_SIZE XF_SIZE TF_SIZE
ROUND_TOWARDS_ZERO SF_SIZE DF_SIZE XF_SIZE TF_SIZE LIBGCC2_TF_CEXT
/* Hooks that are no longer used. */
#pragma GCC poison LANG_HOOKS_FUNCTION_MARK LANG_HOOKS_FUNCTION_FREE \

4
libgcc/ChangeLog
View File

@ -1,3 +1,7 @@
2014-09-18 Joseph Myers <joseph@codesourcery.com>
* libgcc2.c (CEXT): Define using __LIBGCC_*_FUNC_EXT__.
2014-09-18 Joseph Myers <joseph@codesourcery.com>
* config/i386/sfp-machine.h (FP_TRAPPING_EXCEPTIONS): Treat clear

13
libgcc/libgcc2.c
View File

@ -1865,34 +1865,29 @@ NAME (TYPE x, int m)
# define MTYPE SFtype
# define CTYPE SCtype
# define MODE sc
# define CEXT f
# define CEXT __LIBGCC_SF_FUNC_EXT__
# define NOTRUNC __FLT_EVAL_METHOD__ == 0
#elif defined(L_muldc3) || defined(L_divdc3)
# define MTYPE DFtype
# define CTYPE DCtype
# define MODE dc
# define CEXT __LIBGCC_DF_FUNC_EXT__
# if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 64
# define CEXT l
# define NOTRUNC 1
# else
# define CEXT
# define NOTRUNC __FLT_EVAL_METHOD__ == 0 || __FLT_EVAL_METHOD__ == 1
# endif
#elif defined(L_mulxc3) || defined(L_divxc3)
# define MTYPE XFtype
# define CTYPE XCtype
# define MODE xc
# define CEXT l
# define CEXT __LIBGCC_XF_FUNC_EXT__
# define NOTRUNC 1
#elif defined(L_multc3) || defined(L_divtc3)
# define MTYPE TFtype
# define CTYPE TCtype
# define MODE tc
# if LIBGCC2_LONG_DOUBLE_TYPE_SIZE == 128
# define CEXT l
# else
# define CEXT LIBGCC2_TF_CEXT
# endif
# define CEXT __LIBGCC_TF_FUNC_EXT__
# define NOTRUNC 1
#else
# error