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Joseph Myers eaf5ad0bc4 Add canonicalize, canonicalizef, canonicalizel. 
TS 18661-1 defines canonicalize functions to produce a canonical
version of a floating-point representation.  This patch implements
these functions for glibc.

As with the iscanonical macro, these functions are oriented to the
decimal floating-point case, where some values have both canonical and
noncanonical representations.  However, the functions have a return
value that says whether they succeeded in storing a canonical result;
thus, they can fail for the case of an invalid representation (while
still not making any particular choice from among multiple equally
canonical valid representations of the same value).  Since no
floating-point formats in glibc actually have noncanonical valid
representations, a type-generic implementation of these functions can
be used that expects iscanonical to return 0 only for invalid
representations.  Now that iscanonical is used within libm.so,
libm_hidden_proto / libm_hidden_def are added for __iscanonicall.

The definition of these functions is intended to correspond to a
convertFormat operation to the same floating-point format.  Thus, they
convert signaling NaNs to quiet NaNs, raising the "invalid" exception.
Such a conversion "should" produce "the canonical version of that
signaling NaN made quiet".

libm-test.inc is made to check NaN payloads for the output of these
functions, a new feature (at some point manipulation functions such as
fabs and copysign should have tests added that verify payload
preservation for them).  As however some architectures may not follow
the recommended practice of preserving NaN payloads when converting a
signaling NaN to quiet, a new math-tests.h macro
SNAN_TESTS_PRESERVE_PAYLOAD is added, and defined to 0 for non-NAN2008
MIPS; any other architectures seeing test failures for lack of payload
preservation in this case should also define this macro to 0.  (If any
cases arise where the sign isn't preserved either, those should have a
similar macro added.)

The ldbl-96 and ldbl-128ibm tests of iscanonical are renamed and
adapted to test canonicalizel as well on the same representations.

Tested for x86_64, x86, mips64 and powerpc.

	* math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(canonicalize): New declaration.
	* math/Versions (canonicalize): New libm symbol at version
	GLIBC_2.25.
	(canonicalizef): Likewise.
	(canonicalizel): Likewise.
	* math/Makefile (gen-libm-calls): Add s_canonicalizeF.
	* math/s_canonicalize_template.c: New file.
	* math/libm-test.inc: Update comment on functions tested and
	testing of NaN payloads.
	(TEST_NAN_PAYLOAD): New macro.
	(NO_TEST_INLINE): Update value.
	(XFAIL_TEST): Likewise.
	(ERRNO_UNCHANGED): Likewise.
	(ERRNO_EDOM): Likewise.
	(ERRNO_ERANGE): Likewise.
	(IGNORE_RESULT): Likewise.
	(NON_FINITE): Likewise.
	(TEST_SNAN): Likewise.
	(NO_TEST_MATHVEC): Likewise.
	(TEST_NAN_PAYLOAD_CANONICALIZE): New macro.
	(check_float_internal): Check NaN payloads if TEST_NAN_PAYLOAD.
	(struct test_Ffp_b1_data): New type.
	(RUN_TEST_Ffp_b1): New macro.
	(RUN_TEST_LOOP_Ffp_b1): Likewise.
	(canonicalize_test_data): New array.
	(canonicalize_test): New function.
	(main): Call canonicalize_test.
	* manual/arith.texi (FP Bit Twiddling): Document canonicalize,
	canonicalizef and canonicalizel.
	* manual/libm-err-tab.pl: Update comment on interfaces without
	ulps tabulated.
	* sysdeps/ieee754/ldbl-opt/nldbl-canonicalize.c: New file.
	* sysdeps/ieee754/ldbl-opt/s_canonicalizel.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add
	canonicalize.
	(CFLAGS-nldbl-canonicalize.c): New variable.
	* sysdeps/ieee754/ldbl-128ibm/test-iscanonical-ldbl-128ibm.c: Move
	to ...
	* sysdeps/ieee754/ldbl-128ibm/test-canonical-ldbl-128ibm.c:
	... here.
	(do_test): Also test canonicalizel.
	* sysdeps/ieee754/ldbl-128ibm/Makefile (tests): Change
	test-iscanonical-ldbl-128ibm to test-canonical-ldbl-128ibm.
	* sysdeps/ieee754/ldbl-128ibm/include/bits/iscanonical.h: New
	file.
	* sysdeps/ieee754/ldbl-128ibm/s_iscanonicall.c (__iscanonicall):
	Use libm_hidden_def.
	* sysdeps/ieee754/ldbl-96/test-iscanonical-ldbl-96.c: Move to ...
	* sysdeps/ieee754/ldbl-96/test-canonical-ldbl-96.c: ... here.
	(do_test): Also test canonicalizel.
	* sysdeps/ieee754/ldbl-96/Makefile (tests): Change
	test-iscanonical-ldbl-96 to test-canonical-ldbl-96.
	* sysdeps/ieee754/ldbl-96/include/bits/iscanonical.h: New file.
	* sysdeps/ieee754/ldbl-96/s_iscanonicall.c (__iscanonicall): Use
	libm_hidden_def.
	* sysdeps/generic/math-tests.h (SNAN_TESTS_PRESERVE_PAYLOAD): New
	macro.
	* sysdeps/mips/math-tests.h [__mips_hard_float && !__mips_nan2008]
	(SNAN_TESTS_PRESERVE_PAYLOAD): Likewise.
	* sysdeps/nacl/libm.abilist: Update.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
2016-10-26 23:14:31 +00:00
..
examples libio: Multiple fixes for open_{w}memstram (BZ#18241 and BZ#20181) 2016-09-30 09:14:15 -07:00
argp.texi Manual typos: The Basic Program/System Interface 2016-10-06 12:19:25 +05:30
arith.texi Add canonicalize, canonicalizef, canonicalizel. 2016-10-26 23:14:31 +00:00
charset.texi manual: fix typos in character set handling 2016-06-16 00:45:37 -04:00
check-safety.sh Make shebang interpreter directives consistent 2016-01-07 04:03:21 -05:00
conf.texi Manual typos: System Configuration Parameters 2016-10-06 12:24:07 +05:30
contrib.texi Manual typos: Contributors to 2016-10-06 12:30:03 +05:30
creature.texi Support __STDC_WANT_IEC_60559_FUNCS_EXT__ feature test macro. 2016-08-03 22:21:37 +00:00
crypt.texi Manual typos: DES Encryption and Password Handling 2016-10-06 12:25:00 +05:30
ctype.texi manual: fix typos in the character handling chapter 2016-06-16 00:37:44 -04:00
debug.texi Manual typos: Debugging support 2016-10-06 12:25:38 +05:30
dir .. 2005-11-21 15:45:19 +00:00
errno.texi manual: fix typos in error reporting 2016-05-19 23:25:06 -04:00
fdl-1.3.texi BZ#13738: Switch manual to FDL 1.3. 2012-02-24 12:58:10 -08:00
filesys.texi Manual typos: File System Interface 2016-10-06 12:01:51 +05:30
freemanuals.texi Update to canonical freemanuals.texi file. 2013-09-24 14:06:56 -07:00
getopt.texi Manual typos: The Basic Program/System Interface 2016-10-06 12:19:25 +05:30
header.texi Use Texinfo macros to refer to the GNU C Library within the manual. 2012-02-28 14:44:20 +00:00
install-plain.texi BZ #15941: Fix INSTALL file regeneration failure with makeinfo 5.x 2013-12-05 09:58:20 +05:30
install.texi Add configure check to test if gcc supports attribute ifunc. 2016-10-07 10:02:59 +02:00
intro.texi manual: fix typo in the introduction 2016-05-19 23:22:59 -04:00
io.texi Clean up glibc manual references to "GNU system" (bug 6911). 2012-03-08 01:27:38 +00:00
ipc.texi manual/ipc.texi: Fix AC-safety notes. 2014-04-08 17:12:15 -04:00
job.texi Manual typos: Job Control 2016-10-06 12:20:28 +05:30
lang.texi Manual typos: C Language Facilities in the Library 2016-10-06 12:27:48 +05:30
lgpl-2.1.texi Use canonical FSF .texi files for LGPL and FDL texts. 2011-06-06 16:16:55 -07:00
libc-texinfo.sh Make shebang interpreter directives consistent 2016-01-07 04:03:21 -05:00
libc.texinfo Fix doc quoting problems with Texinfo 5 2016-01-10 00:20:51 -08:00
libcbook.texi
libdl.texi * manual/libdl.texi: New. 2014-01-31 23:23:59 -02:00
libm-err-tab.pl Add canonicalize, canonicalizef, canonicalizel. 2016-10-26 23:14:31 +00:00
llio.texi Manual typos: Low-Level Input/Output 2016-10-06 11:58:02 +05:30
locale.texi manual: fix spelling typos 2016-06-16 00:59:57 -04:00
macros.texi Fix exponents in manual. 2015-08-20 09:43:50 +02:00
maint.texi Manual typos: Library Maintenance 2016-10-06 12:29:11 +05:30
Makefile Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
math.texi Manual typos: Mathematics 2016-10-06 12:11:08 +05:30
memory.texi Remove references to sbrk to grow/shrink arenas 2016-10-26 15:07:07 +05:30
message.texi manual: fix typos in the message chapter 2016-06-16 01:14:32 -04:00
nss.texi Manual typos: System Databases and Name Service Switch 2016-10-06 12:36:26 +05:30
nsswitch.texi
pattern.texi manual: fix typos in the pattern chapter 2016-06-16 01:34:38 -04:00
pipe.texi * manual/pipe.texi: Document MTASC-safety properties. 2014-01-31 23:37:28 -02:00
platform.texi PowerPC: Extend Program Priority Register support 2015-08-19 17:43:26 -03:00
probes.texi Manual typos: Internal probes 2016-10-06 12:26:35 +05:30
process.texi Manual typos: Processes 2016-10-06 12:20:00 +05:30
resource.texi Manual typos: Resource Usage and Limitation 2016-10-06 12:16:53 +05:30
search.texi manual: fix typos in the search chapter 2016-06-16 01:24:16 -04:00
setjmp.texi Manual typos: Non-Local Exits 2016-10-06 12:17:29 +05:30
signal.texi Manual typos: Signal Handling 2016-10-06 12:18:05 +05:30
socket.texi Manual typos: Sockets 2016-10-06 12:05:11 +05:30
startup.texi Manual typos: The Basic Program/System Interface 2016-10-06 12:19:25 +05:30
stdio-fp.c update from main archive 970225 1997-02-25 05:18:05 +00:00
stdio.texi Manual typos: Input/Output on Streams 2016-10-06 11:55:58 +05:30
string.texi manual: Clarify the documentation of strverscmp [BZ #20524] 2016-09-21 15:41:17 +02:00
summary.awk Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
sysinfo.texi Manual typos: System Management 2016-10-06 12:23:27 +05:30
syslog.texi Manual typos: Syslog 2016-10-06 12:08:46 +05:30
terminal.texi Manual typos: Low-Level Terminal Interface 2016-10-06 12:07:28 +05:30
texinfo.tex Update miscellaneous files from upstream sources. 2016-01-05 18:04:06 +00:00
texis.awk Correct close statement. 2001-05-18 13:01:32 +00:00
threads.texi Manual typos: POSIX Threads 2016-10-06 12:26:06 +05:30
time.texi Manual typos: Date and Time 2016-10-06 12:14:36 +05:30
tsort.awk Make shebang interpreter directives consistent 2016-01-07 04:03:21 -05:00
users.texi Manual typos: Users and Groups 2016-10-06 12:21:46 +05:30
xtract-typefun.awk Make shebang interpreter directives consistent 2016-01-07 04:03:21 -05:00