glibc/bits
Joseph Myers b2491db6c8 Refactor FP_ILOGB* out of bits/mathdef.h.
Continuing the refactoring of bits/mathdef.h, this patch stops it
defining FP_ILOGB0 and FP_ILOGBNAN, moving the required information to
a new header bits/fp-logb.h.

There are only two possible values of each of those macros permitted
by ISO C.  TS 18661-1 adds corresponding macros for llogb, and their
values are required to correspond to those of the ilogb macros in the
obvious way.  Thus two boolean values - for which the same choices are
correct for most architectures - suffice to determine the value of all
these macros, and by defining macros for those boolean values in
bits/fp-logb.h we can then define the public FP_* macros in math.h and
avoid the present duplication of the associated feature test macro
logic.

This patch duly moves to bits/fp-logb.h defining __FP_LOGB0_IS_MIN and
__FP_LOGBNAN_IS_MIN.  Default definitions of those to 0 are correct
for both architectures, while ia64, m68k and x86 get their own
versions of bits/fp-logb.h to reflect their use of values different
from the defaults.

The patch renders many copies of bits/mathdef.h trivial (needed only
to avoid the default __NO_LONG_DOUBLE_MATH).  I'll revise
<https://sourceware.org/ml/libc-alpha/2016-11/msg00865.html>
accordingly so that it removes all bits/mathdef.h headers except the
default one and the alpha one, and arranges for the header to be
included only by complex.h as the only remaining use at that point
will be for the alpha ABI issues there.

Tested for x86_64 and x86.  Also did compile-only testing with
build-many-glibcs.py (using glibc sources from before the commit that
introduced many build failures with undefined __GI___sigsetjmp).

	* bits/fp-logb.h: New file.
	* sysdeps/ia64/bits/fp-logb.h: Likewise.
	* sysdeps/m68k/m680x0/bits/fp-logb.h: Likewise.
	* sysdeps/x86/bits/fp-logb.h: Likewise.
	* math/Makefile (headers): Add bits/fp-logb.h.
	* math/math.h: Include <bits/fp-logb.h>.
	[__USE_ISOC99] (FP_ILOGB0): Define based on __FP_LOGB0_IS_MIN.
	[__USE_ISOC99] (FP_ILOGBNAN): Define based on __FP_LOGBNAN_IS_MIN.
	* bits/mathdef.h (FP_ILOGB0): Remove.
	(FP_ILOGBNAN): Likewise.
	* sysdeps/aarch64/bits/mathdef.h (FP_ILOGB0): Likewise.
	(FP_ILOGBNAN): Likewise.
	* sysdeps/alpha/bits/mathdef.h (FP_ILOGB0): Likewise.
	(FP_ILOGBNAN): Likewise.
	* sysdeps/ia64/bits/mathdef.h (FP_ILOGB0): Likewise.
	(FP_ILOGBNAN): Likewise.
	* sysdeps/m68k/m680x0/bits/mathdef.h (FP_ILOGB0): Likewise.
	(FP_ILOGBNAN): Likewise.
	* sysdeps/mips/bits/mathdef.h (FP_ILOGB0): Likewise.
	(FP_ILOGBNAN): Likewise.
	* sysdeps/powerpc/bits/mathdef.h (FP_ILOGB0): Likewise.
	(FP_ILOGBNAN): Likewise.
	* sysdeps/s390/bits/mathdef.h (FP_ILOGB0): Likewise.
	(FP_ILOGBNAN): Likewise.
	* sysdeps/sparc/bits/mathdef.h (FP_ILOGB0): Likewise.
	(FP_ILOGBNAN): Likewise.
	* sysdeps/x86/bits/mathdef.h (FP_ILOGB0): Likewise.
	(FP_ILOGBNAN): Likewise.
2016-12-01 02:56:55 +00:00
..
byteswap-16.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
byteswap.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
confname.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
dirent.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
dlfcn.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
elfclass.h Update. 1999-07-27 05:53:25 +00:00
endian.h
environments.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
errno.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
fcntl.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
fenv.h Add femode_t functions. 2016-09-07 16:40:09 +00:00
fenvinline.h Update. 1999-11-11 01:05:26 +00:00
flt-eval-method.h Refactor float_t, double_t information into bits/flt-eval-method.h. 2016-11-24 18:44:50 +00:00
fp-fast.h Refactor FP_FAST_* into bits/fp-fast.h. 2016-11-29 01:45:00 +00:00
fp-logb.h Refactor FP_ILOGB* out of bits/mathdef.h. 2016-12-01 02:56:55 +00:00
huge_val.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
huge_valf.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
huge_vall.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
hwcap.h Move sysdeps/generic/bits/hwcap.h to top-level bits/ 2016-06-22 05:48:11 -07:00
in.h Installed-header hygiene (BZ#20366): obsolete BSD u_* types. 2016-09-23 08:43:56 -04:00
inf.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
ioctl-types.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
ioctls.h
ipc.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
ipctypes.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
iscanonical.h Add iscanonical. 2016-09-30 00:27:50 +00:00
libc-header-start.h Support __STDC_WANT_IEC_60559_FUNCS_EXT__ feature test macro. 2016-08-03 22:21:37 +00:00
libm-simd-decl-stubs.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
link.h * csu/elf-init.c (__libc_csu_fini): Don't do anything here. 2005-01-06 22:40:27 +00:00
local_lim.h
math-vector.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
mathdef.h Refactor FP_ILOGB* out of bits/mathdef.h. 2016-12-01 02:56:55 +00:00
mathinline.h * configure.in (libc_cv_gnu89_inline): Test for -fgnu89-inline. 2007-03-17 17:04:28 +00:00
mman-linux.h Update glibc headers for Linux 4.5. 2016-03-14 19:04:53 +00:00
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mqueue.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
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nan.h
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param.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
poll.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
posix_opt.h
pthreadtypes.h 2002-11-10 Roland McGrath <roland@redhat.com> 2002-11-10 23:22:35 +00:00
resource.h Installed-header hygiene (BZ#20366): time.h types. 2016-09-23 08:43:56 -04:00
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setjmp.h
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sigaction.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
sigcontext.h Installed-header hygiene (BZ#20366): stack_t. 2016-09-23 08:43:56 -04:00
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sigset.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
sigstack.h Installed-header hygiene (BZ#20366): stack_t. 2016-09-23 08:43:56 -04:00
sigthread.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
sockaddr.h Make padding in struct sockaddr_storage explicit [BZ #20111] 2016-05-23 19:43:09 +02:00
socket.h Installed-header hygiene (BZ#20366): Simple self-contained fixes. 2016-09-23 08:43:55 -04:00
stat.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
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string.h Add _STRING_INLINE_unaligned and string_private.h 2016-02-18 14:55:29 -02:00
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sysmacros.h Minimize sysdeps code involved in defining major/minor/makedev. 2016-08-03 15:23:04 -04:00
termios.h Fix TABDLY value 2016-07-13 22:41:40 +02:00
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typesizes.h Consolidate Linux setrlimit and getrlimit implementation 2016-11-17 15:54:22 -02:00
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waitflags.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
waitstatus.h Remove union wait [BZ #19613] 2016-04-14 08:54:57 +02:00
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wordsize.h Define wordsize.h macros everywhere 2016-11-04 09:37:44 -07:00
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