target.h (init_libfuncs): New hook.

	* target.h (init_libfuncs): New hook.
	* target-def.h: Default TARGET_INIT_BUILTINS and
	TARGET_INIT_LIBFUNCS to hook_void_void.  Add
	TARGET_INIT_LIBFUNCS to TARGET_INITIALIZER.
	* builtins.c (default_init_builtins): Delete.
	* expr.h (default_init_builtins): Delete prototype.
	* doc/tm.texi: Document TARGET_INIT_LIBFUNCS and US_SOFTWARE_GOFAST.
	Tweak documentation of TARGET_FLOAT_LIB_COMPARE_RETURNS_BOOL.
	Remove documentation of INIT_TARGET_OPTABS, MULSI3_LIBCALL,
	DIVSI3_LIBCALL, UDIVSI3_LIBCALL, MODSI3_LIBCALL, UMODSI3_LIBCALL,
	MULDI3_LIBCALL, DIVDI3_LIBCALL, UDIVDI3_LIBCALL, MODDI3_LIBCALL,
	and UMODDI3_LIBCALL,

	* Makefile.in (optabs.o): Depends on target.h.
	* defaults.h: Provide default for FLOAT_LIB_COMPARE_RETURNS_BOOL.
	* optabs.c: Include target.h.
	(prepare_float_lib_cmp): No need for #ifdef around use of
	FLOAT_LIB_COMPARE_RETURNS_BOOL.
	(set_optab_libfunc): New function.
	(init_optabs): Delete use of all *_LIBCALL defines.
	Call targetm.init_libfuncs not INIT_TARGET_OPTABS.
	* optabs.h: Prototype set_optab_libfunc.

	* config.gcc: Remove all references to pa/long_double.h,
	ia64/hpux_longdouble.h, and gofast.h.
	(mips-*-*): When --enable-gofast, just add US_SOFTWARE_GOFAST
	to tm_defines; don't set INIT_SUBTARGET_OPTABS or change tm_file.

	* config/alpha/alpha.c, config/c4x/c4x.c, config/cris/cris.c
	* config/frv/frv.c, config/h8300/h8300.c, config/i860/i860.c
	* config/ia64/ia64.c, config/ip2k/ip2k.c, config/m68hc11/m68hc11.c
	* config/mips/mips.c, config/pa/pa.c, config/rs6000/rs6000.c
	* config/sparc/sparc.c, config/vax/vax.c:
	Provide a definition for TARGET_INIT_LIBFUNCS.  Where
	necessary, include optabs.h, libfuncs.h, and/or config/gofast.h.

	* config/alpha/unicosmk.h, config/alpha/vms.h, config/c4x/c4x.h
	* config/avr/avr.h, config/cris/cris.h, config/frv/frv.h
	* config/h8300/h8300.h, config/i860/i860.h, config/ip2k/ip2k.h
	* config/iq2000/iq2000.h, config/m68hc11/m68hc11.h, config/mips/mips.h
	* config/rs6000/aix.h, config/rs6000/sysv4.h, config/sparc/elf.h
	* config/sparc/lite.h, config/sparc/netbsd-elf.h, config/sparc/sol2.h
	* config/sparc/sparc.h, config/v850/v850.h, config/vax/vax.h
	* config/vax/elf.h: Don't define or use INIT_TARGET_OPTABS,
	INIT_SUBTARGET_OPTABS, or any *_LIBCALL macros.

	* config/ia64/hpux.h: Redefine INTEL_EXTENDED_IEEE_FORMAT to 0.
	Set TARGET_INIT_LIBFUNCS and FLOAT_LIB_COMPARE_RETURNS_BOOL here.
	* config/pa/pa-hpux.h: Define LONG_DOUBLE_TYPE_SIZE,
	HPUX_LONG_DOUBLE_LIBRARY, and FLOAT_LIB_COMPARE_RETURNS_BOOL here.
	* config/ia64/hpux_longdouble.h, config/pa/long_double.h: Delete.

	* config/rs6000/xcoff.h: Don't define RS6000_ITRUNC nor RS6000_UITRUNC.
	* config/sparc/sparc.h: Default SUN_CONVERSION_LIBFUNCS and
	SUN_INTEGER_MULTIPLY_64 to 0.
	* config/sparc/sol2.h: Redefine SUN_CONVERSION_LIBFUNCS and
	SUN_INTEGER_MULTIPLY_64 to 1.
	* config/sparc/elf.h: Redefine SUN_CONVERSION_LIBFUNCS and
	SUN_INTEGER_MULTIPLY_64 to 0.
	* config/sparc/lite.h, config/sparc/liteelf.h, config/sparc/sp86x-elf.h:
	Define US_SOFTWARE_GOFAST.
	* config/vax/vax.h: Default TARGET_ELF to 0.
	* config/vax/elf.h: Redefine TARGET_ELF to 1.

	* config/gofast.h: Don't define any macros here.  Provide one
	static function, gofast_maybe_init_libfuncs, which does what
	INIT_GOFAST_LIBFUNCS used to do but only if US_SOFTWARE_GOFAST
	is already defined.  Do not clear negation libfuncs.  Do
	not mess with HFmode, XFmode, or TFmode libfuncs.

	* config/avr/avr.c (avr_init_once): #if 0 out; mark FIXME.

From-SVN: r72009

1 files changed, 39 insertions, 81 deletions

diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi
index 74616d8..2fa6fbd 100644
--- a/gcc/doc/tm.texi
+++ b/gcc/doc/tm.texi
@@ -4630,76 +4630,6 @@ special assembler code.
 @c prevent bad page break with this line
 Here is an explanation of implicit calls to library routines.
 
-@defmac MULSI3_LIBCALL
-A C string constant giving the name of the function to call for
-multiplication of one signed full-word by another.  If you do not
-define this macro, the default name is used, which is @code{__mulsi3},
-a function defined in @file{libgcc.a}.
-@end defmac
-
-@defmac DIVSI3_LIBCALL
-A C string constant giving the name of the function to call for
-division of one signed full-word by another.  If you do not define
-this macro, the default name is used, which is @code{__divsi3}, a
-function defined in @file{libgcc.a}.
-@end defmac
-
-@defmac UDIVSI3_LIBCALL
-A C string constant giving the name of the function to call for
-division of one unsigned full-word by another.  If you do not define
-this macro, the default name is used, which is @code{__udivsi3}, a
-function defined in @file{libgcc.a}.
-@end defmac
-
-@defmac MODSI3_LIBCALL
-A C string constant giving the name of the function to call for the
-remainder in division of one signed full-word by another.  If you do
-not define this macro, the default name is used, which is
-@code{__modsi3}, a function defined in @file{libgcc.a}.
-@end defmac
-
-@defmac UMODSI3_LIBCALL
-A C string constant giving the name of the function to call for the
-remainder in division of one unsigned full-word by another.  If you do
-not define this macro, the default name is used, which is
-@code{__umodsi3}, a function defined in @file{libgcc.a}.
-@end defmac
-
-@defmac MULDI3_LIBCALL
-A C string constant giving the name of the function to call for
-multiplication of one signed double-word by another.  If you do not
-define this macro, the default name is used, which is @code{__muldi3},
-a function defined in @file{libgcc.a}.
-@end defmac
-
-@defmac DIVDI3_LIBCALL
-A C string constant giving the name of the function to call for
-division of one signed double-word by another.  If you do not define
-this macro, the default name is used, which is @code{__divdi3}, a
-function defined in @file{libgcc.a}.
-@end defmac
-
-@defmac UDIVDI3_LIBCALL
-A C string constant giving the name of the function to call for
-division of one unsigned full-word by another.  If you do not define
-this macro, the default name is used, which is @code{__udivdi3}, a
-function defined in @file{libgcc.a}.
-@end defmac
-
-@defmac MODDI3_LIBCALL
-A C string constant giving the name of the function to call for the
-remainder in division of one signed double-word by another.  If you do
-not define this macro, the default name is used, which is
-@code{__moddi3}, a function defined in @file{libgcc.a}.
-@end defmac
-
-@defmac UMODDI3_LIBCALL
-A C string constant giving the name of the function to call for the
-remainder in division of one unsigned full-word by another.  If you do
-not define this macro, the default name is used, which is
-@code{__umoddi3}, a function defined in @file{libgcc.a}.
-@end defmac
-
 @defmac DECLARE_LIBRARY_RENAMES
 This macro, if defined, should expand to a piece of C code that will get
 expanded when compiling functions for libgcc.a.  It can be used to
@@ -4707,19 +4637,47 @@ provide alternate names for gcc's internal library functions if there
 are ABI-mandated names that the compiler should provide.
 @end defmac
 
-@defmac INIT_TARGET_OPTABS
-Define this macro as a C statement that declares additional library
-routines renames existing ones.  @code{init_optabs} calls this macro after
-initializing all the normal library routines.
-@end defmac
+@findex init_one_libfunc
+@findex set_optab_libfunc
+@deftypefn {Target Hook} void TARGET_INIT_LIBFUNCS (void)
+This hook should declare additional library routines or rename
+existing ones, using the functions @code{set_optab_libfunc} and
+@code{init_one_libfunc} defined in @file{optabs.c}.
+@code{init_optabs} calls this macro after initializing all the normal
+library routines.
 
-@defmac FLOAT_LIB_COMPARE_RETURNS_BOOL (@var{mode}, @var{comparison})
-Define this macro as a C statement that returns nonzero if a call to
-the floating point comparison library function will return a boolean
-value that indicates the result of the comparison.  It should return
-zero if one of gcc's own libgcc functions is called.
+The default is to do nothing.  Most ports don't need to define this hook.
+@end deftypefn
 
-Most ports don't need to define this macro.
+@defmac TARGET_FLOAT_LIB_COMPARE_RETURNS_BOOL (@var{mode}, @var{comparison})
+This macro should return @code{true} if the library routine that
+implements the floating point comparison operator @var{comparison} in
+mode @var{mode} will return a boolean, and @var{false} if it will
+return a tristate.
+
+GCC's own floating point libraries return tristates from the
+comparison operators, so the default returns false always.  Most ports
+don't need to define this macro.
+@end defmac
+
+@cindex US Software GOFAST, floating point emulation library
+@cindex floating point emulation library, US Software GOFAST
+@cindex GOFAST, floating point emulation library
+@findex gofast_maybe_init_libfuncs
+@defmac US_SOFTWARE_GOFAST
+Define this macro if your system C library uses the US Software GOFAST
+library to provide floating point emulation.  
+
+In addition to defining this macro, your architecture must set
+@code{TARGET_INIT_LIBFUNCS} to @code{gofast_maybe_init_libfuncs}, or
+else call that function from its version of that hook.  It is defined
+in @file{config/gofast.h}, which must be included by your
+architecture's @file{@var{cpu}.c} file.  See @file{sparc/sparc.c} for
+an example.
+
+If this macro is defined, the
+@code{TARGET_FLOAT_LIB_COMPARE_RETURNS_BOOL} target hook must return
+false for @code{SFmode} and @code{DFmode} comparisons.
 @end defmac
 
 @cindex @code{EDOM}, implicit usage