glibc/sysdeps/unix/sysv/linux/x86_64
Joseph Myers 55a38f8236 Add llogb, llogbf, llogbl.
TS 18661-1 defines llogb functions that are like ilogb except that
they return long int instead of int.  Corresponding FP_LLOGB* macros
are defined, whose values are required to have the obvious
correspondence to those of the FP_ILOGB* macros.

This patch implements these functions and macros for glibc.  llogb
uses the type-generic infrastructure, with an implementation similar
to the wrapper for ilogb but with additional conversion from FP_ILOGB*
to FP_LLOGB*; this approach avoids needing to modify or duplicate any
of the architecture-specific ilogb implementations.  Tests are also
based on those for ilogb.

Ideally the llogb functions would alias the ilogb ones when long is
32-bit, but such aliasing requires the associated header declarations
of the different-type alias to be hidden, typically by defining macros
before including the header (see e.g. how
sysdeps/ieee754/dbl-64/wordsize-64/s_llround.c defines lround to
__hidden_lround before including <math.h>).  The infrastructure for
type-generic function implementations does not support defining such
macros at present (since C code can't define a macro whose name is
determined by other macros).  So this patch leaves them as separate
functions (similar to e.g. scalbln and scalbn being separate in such a
case as well), but with the remapping of FP_ILOGB* to FP_LLOGB*
conditioned out in the case where it would be the identity map.

Tested for x86_64, x86, mips64 and powerpc.

	* math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (llogb):
	New declaration.
	* math/tgmath.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (llogb): New
	macro.
	* math/math.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (__FP_LONG_MAX):
	New macro.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FP_LLOGB0): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FP_LLOGBNAN): Likewise.
	* math/Versions (llogb): New libm symbol at version GLIBC_2.25.
	(llogbf): Likewise.
	(llogbl): Likewise.
	* math/Makefile (gen-libm-calls): Add w_llogbF.
	(tests): Add test-fp-llogb-constants.
	* math/w_llogb_template.c: New file.  Based on
	math/w_ilogb_template.c.
	* math/libm-test.inc (llogb_test_data): New array.
	(llogb_test): New function.
	(main): Call llogb_test.
	* math/test-fp-llogb-constants.c: New file.  Based on
	math/test-fp-ilogb-constants.c.
	* math/test-tgmath-ret.c (llogb): New CHECK_RET_CONST call.
	(do_test): Call check_return_llogb.
	* math/test-tgmath.c (NCALLS): Increase to 126.
	(F(compile_test)): Call llogb.
	(F(llogb)): New function.
	* manual/math.texi (Exponents and Logarithms): Document llogb,
	llogbf, llogbl, FP_LLOGB0 and FP_LLOGBNAN.
	* manual/libm-err-tab.pl (@all_functions): Add llogb.
	* sysdeps/ieee754/ldbl-opt/nldbl-llogb.c: New file.
	* sysdeps/ieee754/ldbl-opt/w_llogbl.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add llogb.
	(CFLAGS-nldbl-llogb.c): New variable.
	* 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.
2016-12-02 01:42:49 +00:00
..
64 Add llogb, llogbf, llogbl. 2016-12-02 01:42:49 +00:00
x32 Add llogb, llogbf, llogbl. 2016-12-02 01:42:49 +00:00
____longjmp_chk.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
__start_context.S Call x86-64 __setcontext directly 2016-03-01 16:55:36 -08:00
arch-fork.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
brk.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
cancellation.S Don't call internal __pthread_unwind via PLT 2016-05-18 13:41:55 -07:00
clone.S Remove cached PID/TID in clone 2016-11-24 19:38:51 -02:00
compat-timer.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
configure
configure.ac
dl-cache.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
dl-procinfo.c Add _dl_x86_cpu_features to rtld_global 2015-08-13 03:41:22 -07:00
dl-procinfo.h Remove IS_IN_ldconfig 2014-11-24 11:41:43 +05:30
get_clockfreq.c
getcontext.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
Implies
init-first.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
kernel_stat.h Allow [f]statfs64 to alias [f]statfs 2016-11-22 09:59:12 -08:00
kernel-features.h Consolidate off_t/off64_t syscall argument passing 2016-04-11 10:07:53 -03:00
ldconfig.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
ldd-rewrite.sed
libc-cancellation.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
libc-lowlevellock.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
libmvec.abilist Simplify the abilist format 2015-11-06 13:58:53 +01:00
librt-cancellation.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
lll_timedlock_wait.c Split timed-wait functions out of nptl/lowlevellock.c. 2015-05-26 14:49:13 -07:00
lll_timedwait_tid.c Split timed-wait functions out of nptl/lowlevellock.c. 2015-05-26 14:49:13 -07:00
lowlevellock.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
lowlevellock.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
lowlevelrobustlock.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
makecontext.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
Makefile Add x86 32 bit vDSO time function support 2015-01-12 16:03:58 -02:00
profil-counter.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
pthread_cond_broadcast.S 2016-01-20 Paul Pluzhnikov <ppluzhnikov@google.com> 2016-01-20 13:39:20 -08:00
pthread_cond_signal.S 2016-01-20 Paul Pluzhnikov <ppluzhnikov@google.com> 2016-01-20 13:39:20 -08:00
pthread_cond_timedwait.S Don't call internal _Unwind_Resume via PLT 2016-05-18 13:43:26 -07:00
pthread_cond_wait.S Don't call internal _Unwind_Resume via PLT 2016-05-18 13:43:26 -07:00
pthread_setaffinity.c
readelflib.c
recv.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
register-dump.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
sched_setaffinity.c
send.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
setcontext.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
sigaction.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
sigaltstack-offsets.sym
sigcontextinfo.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
sigpending.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
sigprocmask.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
swapcontext.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
syscall.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
syscalls.list Consolidate posix_fallocate{64} implementations 2016-10-07 14:16:41 -03:00
sysdep-cancel.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
sysdep.h X86-64: Define LO_HI_LONG to skip pos_h [BZ #20349] 2016-07-11 15:32:23 -07:00
sysdep.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
timer_create.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
timer_delete.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
timer_getoverr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
timer_gettime.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
timer_settime.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
ucontext_i.sym
umount.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
Versions Revert {send,sendm,recv,recvm}msg conformance changes 2016-06-10 11:58:16 -03:00
vfork.S Remove cached PID/TID in clone 2016-11-24 19:38:51 -02:00