mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-03 04:01:43 +08:00
55a38f8236
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. |
||
|---|---|---|
| .. | ||
| bits | ||
| _exit.c | ||
| access.c | ||
| backtrace.c | ||
| brk.c | ||
| chdir.c | ||
| check_fds.c | ||
| chmod.c | ||
| clock_getres.c | ||
| clock_gettime.c | ||
| clock.c | ||
| close.c | ||
| configure | ||
| configure.ac | ||
| createthread.c | ||
| dl-fileid.h | ||
| dl-map-segments.h | ||
| dl-osinfo.h | ||
| dl-sysdep-open.h | ||
| dl-sysdep.c | ||
| dl-sysdep.h | ||
| dl-unmap-segments.h | ||
| dl-writev.h | ||
| dup2.c | ||
| dup.c | ||
| entry.h | ||
| errnos.awk | ||
| euidaccess.c | ||
| exit-thread.h | ||
| fchdir.c | ||
| fchmod.c | ||
| fdatasync.c | ||
| fdopendir.c | ||
| fork.c | ||
| fsync.c | ||
| ftruncate64.c | ||
| ftruncate.c | ||
| futex-internal.h | ||
| fxstat64.c | ||
| fxstat.c | ||
| getcwd.c | ||
| getdents64.c | ||
| getdents.c | ||
| getdtsz.c | ||
| gethostname.c | ||
| getpagesize.c | ||
| getpid.c | ||
| getsysstats.c | ||
| gettimeofday.c | ||
| glob64.c | ||
| glob.c | ||
| ifaddrs.c | ||
| Implies | ||
| init-first.c | ||
| iofdopen.c | ||
| irt.sed | ||
| isatty.c | ||
| kernel-features.h | ||
| ld.abilist | ||
| ldsodefs.h | ||
| libanl.abilist | ||
| libBrokenLocale.abilist | ||
| libc-start.c | ||
| libcrypt.abilist | ||
| libdl.abilist | ||
| libm.abilist | ||
| libpthread.abilist | ||
| libresolv.abilist | ||
| librt.abilist | ||
| libutil.abilist | ||
| link.c | ||
| lll_timedlock_wait.c | ||
| lll_timedwait_tid.c | ||
| lowlevellock-futex.h | ||
| lowlevellock.h | ||
| lseek64.c | ||
| lseek.c | ||
| lxstat64.c | ||
| lxstat.c | ||
| Makefile | ||
| mkdir.c | ||
| mmap64.c | ||
| mmap.c | ||
| mprotect.c | ||
| munmap.c | ||
| nacl_interface_ext_supply.c | ||
| nacl_interface_query.c | ||
| nacl-after-link.sh | ||
| nacl-interface-list.h | ||
| nacl-interface-table.c | ||
| nacl-interfaces.c | ||
| nacl-interfaces.h | ||
| nacl-interfaces.mk.in | ||
| nacl-test-wrapper.sh | ||
| nanosleep.c | ||
| open64.c | ||
| open.c | ||
| preconfigure | ||
| profil.c | ||
| pthread_condattr_setclock.c | ||
| pthread-pids.h | ||
| read.c | ||
| readdir64_r.c | ||
| readdir64.c | ||
| readdir_r.c | ||
| readdir.c | ||
| readlink.c | ||
| rename.c | ||
| rmdir.c | ||
| sched_yield.c | ||
| shlib-versions | ||
| sigaction.c | ||
| sprofil.c | ||
| start.c | ||
| Subdirs | ||
| symlink.c | ||
| tls.h | ||
| truncate64.c | ||
| truncate.c | ||
| uname-values.h | ||
| unlink.c | ||
| utimes.c | ||
| Versions | ||
| write.c | ||
| xstat64.c | ||
| xstat.c | ||
| xstatconv.c | ||
| xstatconv.h | ||