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216 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Feng Xue
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b68fabfbbc |
aarch64: Disable using DC ZVA in emag memset
* sysdeps/aarch64/multiarch/memset_base64.S (DC_ZVA_THRESHOLD):
Disable DC ZVA code if this macro is defined as zero.
* sysdeps/aarch64/multiarch/memset_emag.S (DC_ZVA_THRESHOLD):
Change to zero to disable using DC ZVA.
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Joseph Myers
|
0175c9e9be |
Declare most TS 18661-1 interfaces for C2X.
C2X adds the interfaces from TS 18661-1, and all except a handful in Annex F are unconditionally visible in C2X rather than only visible when __STDC_WANT_IEC_60559_BFP_EXT__ is defined. This patch updates glibc headers accordingly: most uses of __GLIBC_USE (IEC_60559_BFP_EXT) are changed to a new __GLIBC_USE (IEC_60559_BFP_EXT_C2X). (Regarding totalorder and totalordermag, the type-generic macros in tgmath.h will go away when the functions are changed to take pointer arguments.) * bits/libc-header-start.h (__GLIBC_USE_IEC_60559_BFP_EXT): Update comment. (__GLIBC_USE_IEC_60559_BFP_EXT_C2X): New macro. * bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]: Change to [__GLIBC_USE (IEC_60559_BFP_EXT_C2X)]. * include/limits.h [__GLIBC_USE (IEC_60559_BFP_EXT)]: Likewise. * math/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]: Likewise. * math/math.h [__GLIBC_USE (IEC_60559_BFP_EXT)]: Likewise. * stdlib/bits/stdlib-ldbl.h [__GLIBC_USE (IEC_60559_BFP_EXT)]: Likewise. * stdlib/stdint.h [__GLIBC_USE (IEC_60559_BFP_EXT)]: Likewise. * stdlib/stdlib.h [__GLIBC_USE (IEC_60559_BFP_EXT)]: Likewise. * sysdeps/aarch64/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]: Likewise. * sysdeps/alpha/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]: Likewise. * sysdeps/arm/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]: Likewise. * sysdeps/csky/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]: Likewise. * sysdeps/hppa/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]: Likewise. * sysdeps/ia64/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]: Likewise. * sysdeps/m68k/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]: Likewise. * sysdeps/microblaze/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]: Likewise. * sysdeps/mips/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]: Likewise. * sysdeps/nios2/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]: Likewise. * sysdeps/powerpc/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]: Likewise. * sysdeps/riscv/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]: Likewise. * sysdeps/s390/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]: Likewise. * sysdeps/sh/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]: Likewise. * sysdeps/sparc/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]: Likewise. * sysdeps/x86/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]: Likewise. * math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)]: Likewise, except for totalorder, totalordermag, getpayload, setpayload and setpayloadsig. * math/tgmath.h [__GLIBC_USE (IEC_60559_BFP_EXT)]: Likewise, except for totalorder and totalordermag. |
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Szabolcs Nagy
|
30ba037546 |
aarch64: simplify the DT_AARCH64_VARIANT_PCS handling code
Remove unnecessary variant_pcs field: the dynamic tag can be checked directly. * sysdeps/aarch64/dl-machine.h (elf_machine_runtime_setup): Remove the DT_AARCH64_VARIANT_PCS check. (elf_machine_lazy_rel): Use l_info[DT_AARCH64 (VARIANT_PCS)]. * sysdeps/aarch64/linkmap.h (struct link_map_machine): Remove variant_pcs. |
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Szabolcs Nagy
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2b8a3c86e7 |
aarch64: new ifunc resolver ABI
Passing a second argument to the ifunc resolver allows accessing AT_HWCAP2 values from the resolver. AArch64 will start using AT_HWCAP2 on linux because for ilp32 to remain compatible with lp64 ABI no more than 32bit hwcap flags can be in AT_HWCAP which is already used up. Currently the relocation ordering logic does not guarantee that ifunc resolvers can call libc apis or access libc objects, so only the resolver arguments and runtime environment dependent instructions can be used to do the dispatch (this affects ifunc resolvers outside of the libc). Since ifunc resolver is target specific and only supposed to be called by the dynamic linker, the call ABI can be changed in a backward compatible way: Old call ABI passed hwcap as uint64_t, new abi sets the _IFUNC_ARG_HWCAP flag in the hwcap and passes a second argument that's a pointer to an extendible struct. A resolver has to check the _IFUNC_ARG_HWCAP flag before accessing the second argument. The new sys/ifunc.h installed header has the definitions for the new ABI, everything is in the implementation reserved namespace. An alternative approach is to try to support extern calls from ifunc resolvers such as getauxval, but that seems non-trivial https://sourceware.org/ml/libc-alpha/2017-01/msg00468.html * sysdeps/aarch64/Makefile: Install sys/ifunc.h and add tests. * sysdeps/aarch64/dl-irel.h (elf_ifunc_invoke): Update to new ABI. * sysdeps/aarch64/sys/ifunc.h: New file. * sysdeps/aarch64/tst-ifunc-arg-1.c: New file. * sysdeps/aarch64/tst-ifunc-arg-2.c: New file. |
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Szabolcs Nagy
|
82bc69c012 |
aarch64: handle STO_AARCH64_VARIANT_PCS
Avoid lazy binding of symbols that may follow a variant PCS with different register usage convention from the base PCS. Currently the lazy binding entry code does not preserve all the registers required for AdvSIMD and SVE vector calls. Saving and restoring all registers unconditionally may break existing binaries, even if they never use vector calls, because of the larger stack requirement for lazy resolution, which can be significant on an SVE system. The solution is to mark all symbols in the symbol table that may follow a variant PCS so the dynamic linker can handle them specially. In this patch such symbols are always resolved at load time, not lazily. So currently LD_AUDIT for variant PCS symbols are not supported, for that the _dl_runtime_profile entry needs to be changed e.g. to unconditionally save/restore all registers (but pass down arg and retval registers to pltentry/exit callbacks according to the base PCS). This patch also removes a __builtin_expect from the modified code because the branch prediction hint did not seem useful. * sysdeps/aarch64/dl-dtprocnum.h: New file. * sysdeps/aarch64/dl-machine.h (DT_AARCH64): Define. (elf_machine_runtime_setup): Handle DT_AARCH64_VARIANT_PCS. (elf_machine_lazy_rel): Check STO_AARCH64_VARIANT_PCS and bind such symbols at load time. * sysdeps/aarch64/linkmap.h (struct link_map_machine): Add variant_pcs. |
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Anton Youdkevitch
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32e902a94e |
aarch64: thunderx2 memmove performance improvements
The performance improvement is about 20%-30% for larger cases and about 1%-5% for smaller cases. Used SIMD load/store instead of GPR for large overlapping forward moves. Reused existing memcpy implementation for smaller or overlapping backward moves. Fixed the existing memcpy implementation to allow it to deal with the overlapping case. Simplified loop tails in the memcpy implementation - use branchless overlapping sequence of fixed length load/stores instead of branching depending on the size. A cleanup/optimization converting str's to stp's. Added __memmove_thunderx2 to the list of the available implementations. |
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Anton Youdkevitch
|
94e358f6d4 |
aarch64: thunderx2 memcpy implementation cleanup and streamlining
Here is the updated patch for improving the long unaligned code path (the one using "ext" instruction). 1. Always taken conditional branch at the beginning is removed. 2. Epilogue code is placed after the end of the loop to reduce the number of branches. 3. The redundant "mov" instructions inside the loop are gone due to the changed order of the registers in the "ext" instructions inside the loop, the prologue has additional "ext" instruction. 4.Updating count in the prologue was hoisted out as it is the same update for each prologue. 5. Invariant code of the loop epilogue was hoisted out. 6. As the current size of the ext chunk is exactly 16 instructions long "nop" was added at the beginning of the code sequence so that the loop entry for all the chunks be aligned. * sysdeps/aarch64/multiarch/memcpy_thunderx2.S: Cleanup branching and remove redundant code. |
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Joseph Myers
|
a04549c194 |
Break more lines before not after operators.
This patch makes further coding style fixes where code was breaking lines after an operator, contrary to the GNU Coding Standards. As with the previous patch, it is limited to files following a reasonable approximation to GNU style already, and is not exhaustive; more such issues remain to be fixed. Tested for x86_64, and with build-many-glibcs.py. * dirent/dirent.h [!_DIRENT_HAVE_D_NAMLEN && _DIRENT_HAVE_D_RECLEN] (_D_ALLOC_NAMLEN): Break lines before rather than after operators. * elf/cache.c (print_cache): Likewise. * gshadow/fgetsgent_r.c (__fgetsgent_r): Likewise. * htl/pt-getattr.c (__pthread_getattr_np): Likewise. * hurd/hurdinit.c (_hurd_setproc): Likewise. * hurd/hurdkill.c (_hurd_sig_post): Likewise. * hurd/hurdlookup.c (__file_name_lookup_under): Likewise. * hurd/hurdsig.c (_hurd_internal_post_signal): Likewise. (reauth_proc): Likewise. * hurd/lookup-at.c (__file_name_lookup_at): Likewise. (__file_name_split_at): Likewise. (__directory_name_split_at): Likewise. * hurd/lookup-retry.c (__hurd_file_name_lookup_retry): Likewise. * hurd/port2fd.c (_hurd_port2fd): Likewise. * iconv/gconv_dl.c (do_print): Likewise. * inet/netinet/in.h (struct sockaddr_in): Likewise. * libio/wstrops.c (_IO_wstr_seekoff): Likewise. * locale/setlocale.c (new_composite_name): Likewise. * malloc/memusagestat.c (main): Likewise. * misc/fstab.c (fstab_convert): Likewise. * nptl/pthread_mutex_unlock.c (__pthread_mutex_unlock_usercnt): Likewise. * nss/nss_compat/compat-grp.c (getgrent_next_nss): Likewise. (getgrent_next_file): Likewise. (internal_getgrnam_r): Likewise. (internal_getgrgid_r): Likewise. * nss/nss_compat/compat-initgroups.c (getgrent_next_nss): Likewise. (internal_getgrent_r): Likewise. * nss/nss_compat/compat-pwd.c (getpwent_next_nss_netgr): Likewise. (getpwent_next_nss): Likewise. (getpwent_next_file): Likewise. (internal_getpwnam_r): Likewise. (internal_getpwuid_r): Likewise. * nss/nss_compat/compat-spwd.c (getspent_next_nss_netgr): Likewise. (getspent_next_nss): Likewise. (internal_getspnam_r): Likewise. * pwd/fgetpwent_r.c (__fgetpwent_r): Likewise. * shadow/fgetspent_r.c (__fgetspent_r): Likewise. * string/strchr.c (STRCHR): Likewise. * string/strchrnul.c (STRCHRNUL): Likewise. * sysdeps/aarch64/fpu/fpu_control.h (_FPU_FPCR_IEEE): Likewise. * sysdeps/aarch64/sfp-machine.h (_FP_CHOOSENAN): Likewise. * sysdeps/csky/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/generic/memcopy.h (PAGE_COPY_FWD_MAYBE): Likewise. * sysdeps/generic/symbol-hacks.h (__stack_chk_fail_local): Likewise. * sysdeps/gnu/netinet/ip_icmp.h (ICMP_INFOTYPE): Likewise. * sysdeps/gnu/updwtmp.c (TRANSFORM_UTMP_FILE_NAME): Likewise. * sysdeps/gnu/utmp_file.c (TRANSFORM_UTMP_FILE_NAME): Likewise. * sysdeps/hppa/jmpbuf-unwind.h (_JMPBUF_UNWINDS): Likewise. * sysdeps/mach/hurd/bits/stat.h (S_ISPARE): Likewise. * sysdeps/mach/hurd/dl-sysdep.c (_dl_sysdep_start): Likewise. (open_file): Likewise. * sysdeps/mach/hurd/htl/pt-mutexattr-setprotocol.c (pthread_mutexattr_setprotocol): Likewise. * sysdeps/mach/hurd/ioctl.c (__ioctl): Likewise. * sysdeps/mach/hurd/mmap.c (__mmap): Likewise. * sysdeps/mach/hurd/ptrace.c (ptrace): Likewise. * sysdeps/mach/hurd/spawni.c (__spawni): Likewise. * sysdeps/microblaze/dl-machine.h (elf_machine_type_class): Likewise. (elf_machine_rela): Likewise. * sysdeps/mips/mips32/sfp-machine.h (_FP_CHOOSENAN): Likewise. * sysdeps/mips/mips64/sfp-machine.h (_FP_CHOOSENAN): Likewise. * sysdeps/mips/sys/asm.h (multiple #if conditionals): Likewise. * sysdeps/posix/rename.c (rename): Likewise. * sysdeps/powerpc/novmx-sigjmp.c (__novmx__sigjmp_save): Likewise. * sysdeps/powerpc/sigjmp.c (__vmx__sigjmp_save): Likewise. * sysdeps/s390/fpu/fenv_libc.h (FPC_VALID_MASK): Likewise. * sysdeps/s390/utf8-utf16-z9.c (gconv_end): Likewise. * sysdeps/unix/grantpt.c (grantpt): Likewise. * sysdeps/unix/sysv/linux/a.out.h (N_TXTOFF): Likewise. * sysdeps/unix/sysv/linux/updwtmp.c (TRANSFORM_UTMP_FILE_NAME): Likewise. * sysdeps/unix/sysv/linux/utmp_file.c (TRANSFORM_UTMP_FILE_NAME): Likewise. * sysdeps/x86/cpu-features.c (get_common_indices): Likewise. * time/tzfile.c (__tzfile_compute): Likewise. |
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Feng Xue
|
83d1cc42d8 |
aarch64: Optimized memchr specific to AmpereComputing emag
This version uses general register based memory instruction to load
data, because vector register based is slightly slower in emag.
Character-matching is performed on 16-byte (both size and alignment)
memory block in parallel each iteration.
* sysdeps/aarch64/memchr.S (__memchr): Rename to MEMCHR.
[!MEMCHR](MEMCHR): Set to __memchr.
* sysdeps/aarch64/multiarch/Makefile (sysdep_routines):
Add memchr_generic and memchr_nosimd.
* sysdeps/aarch64/multiarch/ifunc-impl-list.c
(__libc_ifunc_impl_list): Add memchr ifuncs.
* sysdeps/aarch64/multiarch/memchr.c: New file.
* sysdeps/aarch64/multiarch/memchr_generic.S: Likewise.
* sysdeps/aarch64/multiarch/memchr_nosimd.S: Likewise.
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Feng Xue
|
c7d3890ff5 |
aarch64: Optimized memset specific to AmpereComputing emag
This version uses general register based memory store instead of
vector register based, for the former is faster than the latter
in emag.
The fact that DC ZVA size in emag is 64-byte, is used by IFUNC
dispatch to select this memset, so that cost of runtime-check on
DC ZVA size can be saved.
* sysdeps/aarch64/multiarch/Makefile (sysdep_routines):
Add memset_emag.
* sysdeps/aarch64/multiarch/ifunc-impl-list.c
(__libc_ifunc_impl_list): Add __memset_emag to memset ifunc.
* sysdeps/aarch64/multiarch/memset.c (libc_ifunc):
Add IS_EMAG check for ifunc dispatch.
* sysdeps/aarch64/multiarch/memset_base64.S: New file.
* sysdeps/aarch64/multiarch/memset_emag.S: New file.
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Wilco Dijkstra
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02f440c1ef |
[AArch64] Add ifunc support for Ares
Add Ares to the midr_el0 list and support ifunc dispatch. Since Ares supports 2 128-bit loads/stores, use Neon registers for memcpy by selecting __memcpy_falkor by default (we should rename this to __memcpy_simd or similar). * manual/tunables.texi (glibc.cpu.name): Add ares tunable. * sysdeps/aarch64/multiarch/memcpy.c (__libc_memcpy): Use __memcpy_falkor for ares. * sysdeps/unix/sysv/linux/aarch64/cpu-features.h (IS_ARES): Add new define. * sysdeps/unix/sysv/linux/aarch64/cpu-features.c (cpu_list): Add ares cpu. |
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Joseph Myers
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04277e02d7 |
Update copyright dates with scripts/update-copyrights.
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise. |
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Wilco Dijkstra
|
5770c0ad1e |
[AArch64] Adjust writeback in non-zero memset
This fixes an ineffiency in the non-zero memset. Delaying the writeback until the end of the loop is slightly faster on some cores - this shows ~5% performance gain on Cortex-A53 when doing large non-zero memsets. * sysdeps/aarch64/memset.S (MEMSET): Improve non-zero memset loop. |
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Steve Ellcey
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f0da0bcf8b | Remove extra space at end of line. | ||
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Anton Youdkevitch
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75c1aee500 |
aarch64: optimized memcpy implementation for thunderx2
Since aligned loads and stores are huge performance
advantage the implementation always tries to do aligned
access. Among the cases when src and dst addresses are
aligned or unaligned evenly there are cases of not evenly
unaligned src and dst. For such cases (if the length is
big enough) ext instruction is used to merge-and-shift
two memory chunks loaded from two adjacent aligned
locations and then the adjusted chunk gets stored to
aligned address.
Performance gain against the current T2 implementation:
memcpy-large: 65K-32M: +40% - +10%
memcpy-walk: 128-32M: +20% - +2%
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Joseph Myers
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c52944e8cc |
Remove unnecessary math_private.h includes.
After my changes to move various macros, inlines and other content from math_private.h to more specific headers, many files including math_private.h no longer need to do so. Furthermore, since the optimized inlines of various functions have been moved to include/fenv.h or replaced by use of function names GCC inlines automatically, a missing math_private.h include where one is appropriate will reliably cause a build failure rather than possibly causing code to be less well optimized while still building successfully. Thus, this patch removes includes of math_private.h that are now unnecessary. In the case of two RISC-V files, the include is replaced by one of stdbool.h because the files in question were relying on math_private.h to get a definition of bool. Tested for x86_64 and x86, and with build-many-glibcs.py. * math/fromfp.h: Do not include <math_private.h>. * math/s_cacosh_template.c: Likewise. * math/s_casin_template.c: Likewise. * math/s_casinh_template.c: Likewise. * math/s_ccos_template.c: Likewise. * math/s_cproj_template.c: Likewise. * math/s_fdim_template.c: Likewise. * math/s_fmaxmag_template.c: Likewise. * math/s_fminmag_template.c: Likewise. * math/s_iseqsig_template.c: Likewise. * math/s_ldexp_template.c: Likewise. * math/s_nextdown_template.c: Likewise. * math/w_log1p_template.c: Likewise. * math/w_scalbln_template.c: Likewise. * sysdeps/aarch64/fpu/feholdexcpt.c: Likewise. * sysdeps/aarch64/fpu/fesetround.c: Likewise. * sysdeps/aarch64/fpu/fgetexcptflg.c: Likewise. * sysdeps/aarch64/fpu/ftestexcept.c: Likewise. * sysdeps/aarch64/fpu/s_llrint.c: Likewise. * sysdeps/aarch64/fpu/s_llrintf.c: Likewise. * sysdeps/aarch64/fpu/s_lrint.c: Likewise. * sysdeps/aarch64/fpu/s_lrintf.c: Likewise. * sysdeps/i386/fpu/s_atanl.c: Likewise. * sysdeps/i386/fpu/s_f32xaddf64.c: Likewise. * sysdeps/i386/fpu/s_f32xsubf64.c: Likewise. * sysdeps/i386/fpu/s_fdim.c: Likewise. * sysdeps/i386/fpu/s_logbl.c: Likewise. * sysdeps/i386/fpu/s_rintl.c: Likewise. * sysdeps/i386/fpu/s_significandl.c: Likewise. * sysdeps/ia64/fpu/s_matherrf.c: Likewise. * sysdeps/ia64/fpu/s_matherrl.c: Likewise. * sysdeps/ieee754/dbl-64/s_atan.c: Likewise. * sysdeps/ieee754/dbl-64/s_cbrt.c: Likewise. * sysdeps/ieee754/dbl-64/s_fma.c: Likewise. * sysdeps/ieee754/dbl-64/s_fmaf.c: Likewise. * sysdeps/ieee754/flt-32/s_cbrtf.c: Likewise. * sysdeps/ieee754/k_standardf.c: Likewise. * sysdeps/ieee754/k_standardl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_copysignl.c: Likewise. * sysdeps/ieee754/ldbl-64-128/s_finitel.c: Likewise. * sysdeps/ieee754/ldbl-64-128/s_fpclassifyl.c: Likewise. * sysdeps/ieee754/ldbl-64-128/s_isinfl.c: Likewise. * sysdeps/ieee754/ldbl-64-128/s_isnanl.c: Likewise. * sysdeps/ieee754/ldbl-64-128/s_signbitl.c: Likewise. * sysdeps/ieee754/ldbl-96/s_cbrtl.c: Likewise. * sysdeps/ieee754/ldbl-96/s_fma.c: Likewise. * sysdeps/ieee754/ldbl-96/s_fmal.c: Likewise. * sysdeps/ieee754/s_signgam.c: Likewise. * sysdeps/powerpc/power5+/fpu/s_modf.c: Likewise. * sysdeps/powerpc/power5+/fpu/s_modff.c: Likewise. * sysdeps/powerpc/power7/fpu/s_logbf.c: Likewise. * sysdeps/riscv/rv64/rvd/s_ceil.c: Likewise. * sysdeps/riscv/rv64/rvd/s_floor.c: Likewise. * sysdeps/riscv/rv64/rvd/s_nearbyint.c: Likewise. * sysdeps/riscv/rv64/rvd/s_round.c: Likewise. * sysdeps/riscv/rv64/rvd/s_roundeven.c: Likewise. * sysdeps/riscv/rv64/rvd/s_trunc.c: Likewise. * sysdeps/riscv/rvd/s_finite.c: Likewise. * sysdeps/riscv/rvd/s_fmax.c: Likewise. * sysdeps/riscv/rvd/s_fmin.c: Likewise. * sysdeps/riscv/rvd/s_fpclassify.c: Likewise. * sysdeps/riscv/rvd/s_isinf.c: Likewise. * sysdeps/riscv/rvd/s_isnan.c: Likewise. * sysdeps/riscv/rvd/s_issignaling.c: Likewise. * sysdeps/riscv/rvf/fegetround.c: Likewise. * sysdeps/riscv/rvf/feholdexcpt.c: Likewise. * sysdeps/riscv/rvf/fesetenv.c: Likewise. * sysdeps/riscv/rvf/fesetround.c: Likewise. * sysdeps/riscv/rvf/feupdateenv.c: Likewise. * sysdeps/riscv/rvf/fgetexcptflg.c: Likewise. * sysdeps/riscv/rvf/ftestexcept.c: Likewise. * sysdeps/riscv/rvf/s_ceilf.c: Likewise. * sysdeps/riscv/rvf/s_finitef.c: Likewise. * sysdeps/riscv/rvf/s_floorf.c: Likewise. * sysdeps/riscv/rvf/s_fmaxf.c: Likewise. * sysdeps/riscv/rvf/s_fminf.c: Likewise. * sysdeps/riscv/rvf/s_fpclassifyf.c: Likewise. * sysdeps/riscv/rvf/s_isinff.c: Likewise. * sysdeps/riscv/rvf/s_isnanf.c: Likewise. * sysdeps/riscv/rvf/s_issignalingf.c: Likewise. * sysdeps/riscv/rvf/s_nearbyintf.c: Likewise. * sysdeps/riscv/rvf/s_roundevenf.c: Likewise. * sysdeps/riscv/rvf/s_roundf.c: Likewise. * sysdeps/riscv/rvf/s_truncf.c: Likewise. * sysdeps/riscv/rv64/rvd/s_rint.c: Include <stdbool.h> instead of <math_private.h>. * sysdeps/riscv/rvf/s_rintf.c: Likewise. |
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Joseph Myers
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9755bc4686 |
Use round functions not __round functions in glibc libm.
Continuing the move to use, within libm, public names for libm functions that can be inlined as built-in functions on many architectures, this patch moves calls to __round functions to call the corresponding round names instead, with asm redirection to __round when the calls are not inlined. An additional complication arises in sysdeps/ieee754/ldbl-128ibm/e_expl.c, where a call to roundl, with the result converted to int, gets converted by the compiler to call lroundl in the case of 32-bit long, so resulting in localplt test failures. It's logically correct to let the compiler make such an optimization; an appropriate asm redirection of lroundl to __lroundl is thus added to that file (it's not needed anywhere else). Tested for x86_64, and with build-many-glibcs.py. * include/math.h [!_ISOMAC && !(__FINITE_MATH_ONLY__ && __FINITE_MATH_ONLY__ > 0) && !NO_MATH_REDIRECT] (round): Redirect using MATH_REDIRECT. * sysdeps/aarch64/fpu/s_round.c: Define NO_MATH_REDIRECT before header inclusion. * sysdeps/aarch64/fpu/s_roundf.c: Likewise. * sysdeps/ieee754/dbl-64/s_round.c: Likewise. * sysdeps/ieee754/dbl-64/wordsize-64/s_round.c: Likewise. * sysdeps/ieee754/float128/s_roundf128.c: Likewise. * sysdeps/ieee754/flt-32/s_roundf.c: Likewise. * sysdeps/ieee754/ldbl-128/s_roundl.c: Likewise. * sysdeps/ieee754/ldbl-96/s_roundl.c: Likewise. * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_round.c: Likewise. * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_roundf.c: Likewise. * sysdeps/powerpc/powerpc64/fpu/multiarch/s_round.c: Likewise. * sysdeps/powerpc/powerpc64/fpu/multiarch/s_roundf.c: Likewise. * sysdeps/riscv/rv64/rvd/s_round.c: Likewise. * sysdeps/riscv/rvf/s_roundf.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_roundl.c: Likewise. (round): Redirect to __round. (__roundl): Call round instead of __round. * sysdeps/powerpc/fpu/math_private.h [_ARCH_PWR5X] (__round): Remove macro. [_ARCH_PWR5X] (__roundf): Likewise. * sysdeps/ieee754/dbl-64/e_gamma_r.c (gamma_positive): Use round functions instead of __round variants. * sysdeps/ieee754/flt-32/e_gammaf_r.c (gammaf_positive): Likewise. * sysdeps/ieee754/ldbl-128/e_gammal_r.c (gammal_positive): Likewise. * sysdeps/ieee754/ldbl-128ibm/e_gammal_r.c (gammal_positive): Likewise. * sysdeps/ieee754/ldbl-96/e_gammal_r.c (gammal_positive): Likewise. * sysdeps/x86/fpu/powl_helper.c (__powl_helper): Likewise. * sysdeps/ieee754/ldbl-128ibm/e_expl.c (lroundl): Redirect to __lroundl. (__ieee754_expl): Call roundl instead of __roundl. |
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Joseph Myers
|
7abf97bed9 |
Use trunc functions not __trunc functions in glibc libm.
Continuing the move to use, within libm, public names for libm functions that can be inlined as built-in functions on many architectures, this patch moves calls to __trunc functions to call the corresponding trunc names instead, with asm redirection to __trunc when the calls are not inlined. Tested for x86_64, and with build-many-glibcs.py. * include/math.h [!_ISOMAC && !(__FINITE_MATH_ONLY__ && __FINITE_MATH_ONLY__ > 0) && !NO_MATH_REDIRECT] (trunc): Redirect using MATH_REDIRECT. * sysdeps/aarch64/fpu/s_trunc.c: Define NO_MATH_REDIRECT before header inclusion. * sysdeps/aarch64/fpu/s_truncf.c: Likewise. * sysdeps/ieee754/dbl-64/wordsize-64/s_trunc.c: Likewise. * sysdeps/ieee754/float128/s_truncf128.c: Likewise. * sysdeps/ieee754/dbl-64/s_trunc.c: Likewise. * sysdeps/ieee754/flt-32/s_truncf.c: Likewise. * sysdeps/ieee754/ldbl-128/s_truncl.c: Likewise. * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_trunc.c: Likewise. * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_truncf.c: Likewise. * sysdeps/powerpc/powerpc64/fpu/multiarch/s_trunc.c: Likewise. * sysdeps/powerpc/powerpc64/fpu/multiarch/s_truncf.c: Likewise. * sysdeps/riscv/rv64/rvd/s_trunc.c: Likewise. * sysdeps/riscv/rvf/s_truncf.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_trunc.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_truncf.c: Likewise. * sysdeps/x86_64/fpu/multiarch/s_trunc.c: Likewise. * sysdeps/x86_64/fpu/multiarch/s_truncf.c: Likewise. * sysdeps/m68k/m680x0/fpu/s_trunc_template.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_truncl.c: Likewise. (ceil): Redirect to __ceil. (floor): Redirect to __floor. (trunc): Redirect to __trunc. (__truncl): Call trunc instead of __trunc. * sysdeps/powerpc/fpu/math_private.h [_ARCH_PWR5X] (__trunc): Remove macro. [_ARCH_PWR5X] (__truncf): Likewise. * sysdeps/ieee754/dbl-64/e_gamma_r.c (__ieee754_gamma_r): Use trunc functions instead of __trunc variants. * sysdeps/ieee754/flt-32/e_gammaf_r.c (__ieee754_gammaf_r): Likewise. * sysdeps/ieee754/ldbl-128/e_gammal_r.c (__ieee754_gammal_r): Likewise. * sysdeps/ieee754/ldbl-128ibm/e_gammal_r.c (__ieee754_gammal_r): Likewise. * sysdeps/ieee754/ldbl-96/e_gammal_r.c (__ieee754_gammal_r): Likewise. |
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Joseph Myers
|
71223ef909 |
Use ceil functions not __ceil functions in glibc libm.
Continuing the move to use, within libm, public names for libm functions that can be inlined as built-in functions on many architectures, this patch moves calls to __ceil functions to call the corresponding ceil names instead, with asm redirection to __ceil when the calls are not inlined. Tested for x86_64, and with build-many-glibcs.py. * include/math.h [!_ISOMAC && !(__FINITE_MATH_ONLY__ && __FINITE_MATH_ONLY__ > 0) && !NO_MATH_REDIRECT] (ceil): Redirect using MATH_REDIRECT. * sysdeps/aarch64/fpu/s_ceil.c: Define NO_MATH_REDIRECT before header inclusion. * sysdeps/aarch64/fpu/s_ceilf.c: Likewise. * sysdeps/ieee754/dbl-64/s_ceil.c: Likewise. * sysdeps/ieee754/dbl-64/wordsize-64/s_ceil.c: Likewise. * sysdeps/ieee754/float128/s_ceilf128.c: Likewise. * sysdeps/ieee754/flt-32/s_ceilf.c: Likewise. * sysdeps/ieee754/ldbl-128/s_ceill.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_ceill.c: Likewise. * sysdeps/m68k/m680x0/fpu/s_ceil_template.c: Likewise. * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_ceil.c: Likewise. * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_ceilf.c: Likewise. * sysdeps/powerpc/powerpc64/fpu/multiarch/s_ceil.c: Likewise. * sysdeps/powerpc/powerpc64/fpu/multiarch/s_ceilf.c: Likewise. * sysdeps/riscv/rv64/rvd/s_ceil.c: Likewise. * sysdeps/riscv/rvf/s_ceilf.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_ceil.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_ceilf.c: Likewise. * sysdeps/x86_64/fpu/multiarch/s_ceil.c: Likewise. * sysdeps/x86_64/fpu/multiarch/s_ceilf.c: Likewise. * sysdeps/powerpc/fpu/math_private.h [_ARCH_PWR5X] (__ceil): Remove macro. * sysdeps/ieee754/dbl-64/e_gamma_r.c (gamma_positive): Use ceil functions instead of __ceil variants. * sysdeps/ieee754/flt-32/e_gammaf_r.c (gammaf_positive): Likewise. * sysdeps/ieee754/ldbl-128/e_gammal_r.c (gammal_positive): Likewise. * sysdeps/ieee754/ldbl-128ibm/e_gammal_r.c (gammal_positive): Likewise. * sysdeps/ieee754/ldbl-128ibm/s_truncl.c (__truncl): Likewise. * sysdeps/ieee754/ldbl-96/e_gammal_r.c (gammal_positive): Likewise. * sysdeps/powerpc/power5+/fpu/s_modf.c (__modf): Likewise. * sysdeps/powerpc/power5+/fpu/s_modff.c (__modff): Likewise. |
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Joseph Myers
|
f29b6f17e4 |
Use rint functions not __rint functions in glibc libm.
Continuing the move to use, within libm, public names for libm functions that can be inlined as built-in functions on many architectures, this patch moves calls to __rint functions to call the corresponding rint names instead, with asm redirection to __rint when the calls are not inlined. The x86_64 math_private.h is removed as no longer useful after this patch. This patch is relative to a tree with my floor patch <https://sourceware.org/ml/libc-alpha/2018-09/msg00148.html> applied, and much the same considerations arise regarding possibly replacing an IFUNC call with a direct inline expansion. Tested for x86_64, and with build-many-glibcs.py. * include/math.h [!_ISOMAC && !(__FINITE_MATH_ONLY__ && __FINITE_MATH_ONLY__ > 0) && !NO_MATH_REDIRECT] (rint): Redirect using MATH_REDIRECT. * sysdeps/aarch64/fpu/s_rint.c: Define NO_MATH_REDIRECT before header inclusion. * sysdeps/aarch64/fpu/s_rintf.c: Likewise. * sysdeps/alpha/fpu/s_rint.c: Likewise. * sysdeps/alpha/fpu/s_rintf.c: Likewise. * sysdeps/i386/fpu/s_rintl.c: Likewise. * sysdeps/ieee754/dbl-64/s_rint.c: Likewise. * sysdeps/ieee754/dbl-64/wordsize-64/s_rint.c: Likewise. * sysdeps/ieee754/float128/s_rintf128.c: Likewise. * sysdeps/ieee754/flt-32/s_rintf.c: Likewise. * sysdeps/ieee754/ldbl-128/s_rintl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_rintl.c: Likewise. * sysdeps/m68k/coldfire/fpu/s_rint.c: Likewise. * sysdeps/m68k/coldfire/fpu/s_rintf.c: Likewise. * sysdeps/m68k/m680x0/fpu/s_rint.c: Likewise. * sysdeps/m68k/m680x0/fpu/s_rintf.c: Likewise. * sysdeps/m68k/m680x0/fpu/s_rintl.c: Likewise. * sysdeps/powerpc/fpu/s_rint.c: Likewise. * sysdeps/powerpc/fpu/s_rintf.c: Likewise. * sysdeps/riscv/rv64/rvd/s_rint.c: Likewise. * sysdeps/riscv/rvf/s_rintf.c: Likewise. * sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_rint.c: Likewise. * sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/s_rintf.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_rint.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_rintf.c: Likewise. * sysdeps/x86_64/fpu/multiarch/s_rint.c: Likewise. * sysdeps/x86_64/fpu/multiarch/s_rintf.c: Likewise. * sysdeps/x86_64/fpu/math_private.h: Remove file. * math/e_scalb.c (invalid_fn): Use rint functions instead of __rint variants. * math/e_scalbf.c (invalid_fn): Likewise. * math/e_scalbl.c (invalid_fn): Likewise. * sysdeps/ieee754/dbl-64/e_gamma_r.c (__ieee754_gamma_r): Likewise. * sysdeps/ieee754/flt-32/e_gammaf_r.c (__ieee754_gammaf_r): Likewise. * sysdeps/ieee754/k_standard.c (__kernel_standard): Likewise. * sysdeps/ieee754/k_standardl.c (__kernel_standard_l): Likewise. * sysdeps/ieee754/ldbl-128/e_gammal_r.c (__ieee754_gammal_r): Likewise. * sysdeps/ieee754/ldbl-128ibm/e_gammal_r.c (__ieee754_gammal_r): Likewise. * sysdeps/ieee754/ldbl-96/e_gammal_r.c (__ieee754_gammal_r): Likewise. * sysdeps/powerpc/powerpc32/fpu/s_llrint.c (__llrint): Likewise. * sysdeps/powerpc/powerpc32/fpu/s_llrintf.c (__llrintf): Likewise. |
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Joseph Myers
|
e44acb2063 |
Use floor functions not __floor functions in glibc libm.
Similar to the changes that were made to call sqrt functions directly in glibc, instead of __ieee754_sqrt variants, so that the compiler could inline them automatically without needing special inline definitions in lots of math_private.h headers, this patch makes libm code call floor functions directly instead of __floor variants, removing the inlines / macros for x86_64 (SSE4.1) and powerpc (POWER5). The redirection used to ensure that __ieee754_sqrt does still get called when the compiler doesn't inline a built-in function expansion is refactored so it can be applied to other functions; the refactoring is arranged so it's not limited to unary functions either (it would be reasonable to use this mechanism for copysign - removing the inline in math_private_calls.h but also eliminating unnecessary local PLT entry use in the cases (powerpc soft-float and e500v1, for IBM long double) where copysign calls don't get inlined). The point of this change is that more architectures can get floor calls inlined where they weren't previously (AArch64, for example), without needing special inline definitions in their math_private.h, and existing such definitions in math_private.h headers can be removed. Note that it's possible that in some cases an inline may be used where an IFUNC call was previously used - this is the case on x86_64, for example. I think the direct calls to floor are still appropriate; if there's any significant performance cost from inline SSE2 floor instead of an IFUNC call ending up with SSE4.1 floor, that indicates that either the function should be doing something else that's faster than using floor at all, or it should itself have IFUNC variants, or that the compiler choice of inlining for generic tuning should change to allow for the possibility that, by not inlining, an SSE4.1 IFUNC might be called at runtime - but not that glibc should avoid calling floor internally. (After all, all the same considerations would apply to any user program calling floor, where it might either be inlined or left as an out-of-line call allowing for a possible IFUNC.) Tested for x86_64, and with build-many-glibcs.py. * include/math.h [!_ISOMAC && !(__FINITE_MATH_ONLY__ && __FINITE_MATH_ONLY__ > 0) && !NO_MATH_REDIRECT] (MATH_REDIRECT): New macro. [!_ISOMAC && !(__FINITE_MATH_ONLY__ && __FINITE_MATH_ONLY__ > 0) && !NO_MATH_REDIRECT] (MATH_REDIRECT_LDBL): Likewise. [!_ISOMAC && !(__FINITE_MATH_ONLY__ && __FINITE_MATH_ONLY__ > 0) && !NO_MATH_REDIRECT] (MATH_REDIRECT_F128): Likewise. [!_ISOMAC && !(__FINITE_MATH_ONLY__ && __FINITE_MATH_ONLY__ > 0) && !NO_MATH_REDIRECT] (MATH_REDIRECT_UNARY_ARGS): Likewise. [!_ISOMAC && !(__FINITE_MATH_ONLY__ && __FINITE_MATH_ONLY__ > 0) && !NO_MATH_REDIRECT] (sqrt): Redirect using MATH_REDIRECT. [!_ISOMAC && !(__FINITE_MATH_ONLY__ && __FINITE_MATH_ONLY__ > 0) && !NO_MATH_REDIRECT] (floor): Likewise. * sysdeps/aarch64/fpu/s_floor.c: Define NO_MATH_REDIRECT before header inclusion. * sysdeps/aarch64/fpu/s_floorf.c: Likewise. * sysdeps/ieee754/dbl-64/s_floor.c: Likewise. * sysdeps/ieee754/dbl-64/wordsize-64/s_floor.c: Likewise. * sysdeps/ieee754/float128/s_floorf128.c: Likewise. * sysdeps/ieee754/flt-32/s_floorf.c: Likewise. * sysdeps/ieee754/ldbl-128/s_floorl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_floorl.c: Likewise. * sysdeps/m68k/m680x0/fpu/s_floor_template.c: Likewise. * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_floor.c: Likewise. * sysdeps/powerpc/powerpc32/power4/fpu/multiarch/s_floorf.c: Likewise. * sysdeps/powerpc/powerpc64/fpu/multiarch/s_floor.c: Likewise. * sysdeps/powerpc/powerpc64/fpu/multiarch/s_floorf.c: Likewise. * sysdeps/riscv/rv64/rvd/s_floor.c: Likewise. * sysdeps/riscv/rvf/s_floorf.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_floor.c: Likewise. * sysdeps/sparc/sparc64/fpu/multiarch/s_floorf.c: Likewise. * sysdeps/x86_64/fpu/multiarch/s_floor.c: Likewise. * sysdeps/x86_64/fpu/multiarch/s_floorf.c: Likewise. * sysdeps/powerpc/fpu/math_private.h [_ARCH_PWR5X] (__floor): Remove macro. [_ARCH_PWR5X] (__floorf): Likewise. * sysdeps/x86_64/fpu/math_private.h [__SSE4_1__] (__floor): Remove inline function. [__SSE4_1__] (__floorf): Likewise. * math/w_lgamma_main.c (LGFUNC (__lgamma)): Use floor functions instead of __floor variants. * math/w_lgamma_r_compat.c (__lgamma_r): Likewise. * math/w_lgammaf_main.c (LGFUNC (__lgammaf)): Likewise. * math/w_lgammaf_r_compat.c (__lgammaf_r): Likewise. * math/w_lgammal_main.c (LGFUNC (__lgammal)): Likewise. * math/w_lgammal_r_compat.c (__lgammal_r): Likewise. * math/w_tgamma_compat.c (__tgamma): Likewise. * math/w_tgamma_template.c (M_DECL_FUNC (__tgamma)): Likewise. * math/w_tgammaf_compat.c (__tgammaf): Likewise. * math/w_tgammal_compat.c (__tgammal): Likewise. * sysdeps/ieee754/dbl-64/e_lgamma_r.c (sin_pi): Likewise. * sysdeps/ieee754/dbl-64/k_rem_pio2.c (__kernel_rem_pio2): Likewise. * sysdeps/ieee754/dbl-64/lgamma_neg.c (__lgamma_neg): Likewise. * sysdeps/ieee754/flt-32/e_lgammaf_r.c (sin_pif): Likewise. * sysdeps/ieee754/flt-32/lgamma_negf.c (__lgamma_negf): Likewise. * sysdeps/ieee754/ldbl-128/e_lgammal_r.c (__ieee754_lgammal_r): Likewise. * sysdeps/ieee754/ldbl-128/e_powl.c (__ieee754_powl): Likewise. * sysdeps/ieee754/ldbl-128/lgamma_negl.c (__lgamma_negl): Likewise. * sysdeps/ieee754/ldbl-128/s_expm1l.c (__expm1l): Likewise. * sysdeps/ieee754/ldbl-128ibm/e_lgammal_r.c (__ieee754_lgammal_r): Likewise. * sysdeps/ieee754/ldbl-128ibm/e_powl.c (__ieee754_powl): Likewise. * sysdeps/ieee754/ldbl-128ibm/lgamma_negl.c (__lgamma_negl): Likewise. * sysdeps/ieee754/ldbl-128ibm/s_expm1l.c (__expm1l): Likewise. * sysdeps/ieee754/ldbl-128ibm/s_truncl.c (__truncl): Likewise. * sysdeps/ieee754/ldbl-96/e_lgammal_r.c (sin_pi): Likewise. * sysdeps/ieee754/ldbl-96/lgamma_negl.c (__lgamma_negl): Likewise. * sysdeps/powerpc/power5+/fpu/s_modf.c (__modf): Likewise. * sysdeps/powerpc/power5+/fpu/s_modff.c (__modff): Likewise. |
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Szabolcs Nagy
|
e70c176825 |
Add new exp and exp2 implementations
Optimized exp and exp2 implementations using a lookup table for fractional powers of 2. There are several variants, see e_exp_data.c, they can be selected by modifying math_config.h allowing different tradeoffs. The default selection should be acceptable as generic libm code. Worst case error is 0.509 ULP for exp and 0.507 ULP for exp2, on aarch64 the rodata size is 2160 bytes, shared between exp and exp2. On aarch64 .text + .rodata size decreased by 24912 bytes. The non-nearest rounding error is less than 1 ULP even on targets without efficient round implementation (although the error rate is higher in that case). Targets with single instruction, rounding mode independent, to nearest integer rounding and conversion can use them by setting TOINT_INTRINSICS and adding the necessary code to their math_private.h. The __exp1 code uses the same algorithm, so the error bound of pow increased a bit. New double precision error handling code was added following the style of the single precision error handling code. Improvements on Cortex-A72 compared to current glibc master: exp thruput: 1.61x in [-9.9 9.9] exp latency: 1.53x in [-9.9 9.9] exp thruput: 1.13x in [0.5 1] exp latency: 1.30x in [0.5 1] exp2 thruput: 2.03x in [-9.9 9.9] exp2 latency: 1.64x in [-9.9 9.9] For small (< 1) inputs the current exp code uses a separate algorithm so the speed up there is less. Was tested on aarch64-linux-gnu (TOINT_INTRINSICS, fma contraction) and arm-linux-gnueabihf (!TOINT_INTRINSICS, no fma contraction) and x86_64-linux-gnu (!TOINT_INTRINSICS, no fma contraction) and powerpc64le-linux-gnu (!TOINT_INTRINSICS, fma contraction) targets, only non-nearest rounding ulp errors increase and they are within acceptable bounds (ulp updates are in separate patches). * NEWS: Mention exp and exp2 improvements. * math/Makefile (libm-support): Remove t_exp. (type-double-routines): Add math_err and e_exp_data. * sysdeps/aarch64/libm-test-ulps: Update. * sysdeps/arm/libm-test-ulps: Update. * sysdeps/i386/fpu/e_exp_data.c: New file. * sysdeps/i386/fpu/math_err.c: New file. * sysdeps/i386/fpu/t_exp.c: Remove. * sysdeps/ia64/fpu/e_exp_data.c: New file. * sysdeps/ia64/fpu/math_err.c: New file. * sysdeps/ia64/fpu/t_exp.c: Remove. * sysdeps/ieee754/dbl-64/e_exp.c: Rewrite. * sysdeps/ieee754/dbl-64/e_exp2.c: Rewrite. * sysdeps/ieee754/dbl-64/e_exp_data.c: New file. * sysdeps/ieee754/dbl-64/e_pow.c (__ieee754_pow): Update error bound. * sysdeps/ieee754/dbl-64/eexp.tbl: Remove. * sysdeps/ieee754/dbl-64/math_config.h: New file. * sysdeps/ieee754/dbl-64/math_err.c: New file. * sysdeps/ieee754/dbl-64/t_exp.c: Remove. * sysdeps/ieee754/dbl-64/t_exp2.h: Remove. * sysdeps/ieee754/dbl-64/uexp.h: Remove. * sysdeps/ieee754/dbl-64/uexp.tbl: Remove. * sysdeps/m68k/m680x0/fpu/e_exp_data.c: New file. * sysdeps/m68k/m680x0/fpu/math_err.c: New file. * sysdeps/m68k/m680x0/fpu/t_exp.c: Remove. * sysdeps/powerpc/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Update. |
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Joseph Myers
|
70e2ba332f |
Do not include fenv_private.h in math_private.h.
Continuing the clean-up related to the catch-all math_private.h header, this patch stops math_private.h from including fenv_private.h. Instead, fenv_private.h is included directly from those users of math_private.h that also used interfaces from fenv_private.h. No attempt is made to remove unused includes of math_private.h, but that is a natural followup. (However, since math_private.h sometimes defines optimized versions of math.h interfaces or __* variants thereof, as well as defining its own interfaces, I think it might make sense to get all those optimized versions included from include/math.h, not requiring a separate header at all, before eliminating unused math_private.h includes - that avoids a file quietly becoming less-optimized if someone adds a call to one of those interfaces without restoring a math_private.h include to that file.) There is still a pitfall that if code uses plain fe* and __fe* interfaces, but only includes fenv.h and not fenv_private.h or (before this patch) math_private.h, it will compile on platforms with exceptions and rounding modes but not get the optimized versions (and possibly not compile) on platforms without exception and rounding mode support, so making it easy to break the build for such platforms accidentally. I think it would be most natural to move the inlines / macros for fe* and __fe* in the case of no exceptions and rounding modes into include/fenv.h, so that all code including fenv.h with _ISOMAC not defined automatically gets them. Then fenv_private.h would be purely the header for the libc_fe*, SET_RESTORE_ROUND etc. internal interfaces and the risk of breaking the build on other platforms than the one you tested on because of a missing fenv_private.h include would be much reduced (and there would be some unused fenv_private.h includes to remove along with unused math_private.h includes). Tested for x86_64 and x86, and tested with build-many-glibcs.py that installed stripped shared libraries are unchanged by this patch. * sysdeps/generic/math_private.h: Do not include <fenv_private.h>. * math/fromfp.h: Include <fenv_private.h>. * math/math-narrow.h: Likewise. * math/s_cexp_template.c: Likewise. * math/s_csin_template.c: Likewise. * math/s_csinh_template.c: Likewise. * math/s_ctan_template.c: Likewise. * math/s_ctanh_template.c: Likewise. * math/s_iseqsig_template.c: Likewise. * math/w_acos_compat.c: Likewise. * math/w_acosf_compat.c: Likewise. * math/w_acosl_compat.c: Likewise. * math/w_asin_compat.c: Likewise. * math/w_asinf_compat.c: Likewise. * math/w_asinl_compat.c: Likewise. * math/w_ilogb_template.c: Likewise. * math/w_j0_compat.c: Likewise. * math/w_j0f_compat.c: Likewise. * math/w_j0l_compat.c: Likewise. * math/w_j1_compat.c: Likewise. * math/w_j1f_compat.c: Likewise. * math/w_j1l_compat.c: Likewise. * math/w_jn_compat.c: Likewise. * math/w_jnf_compat.c: Likewise. * math/w_llogb_template.c: Likewise. * math/w_log10_compat.c: Likewise. * math/w_log10f_compat.c: Likewise. * math/w_log10l_compat.c: Likewise. * math/w_log2_compat.c: Likewise. * math/w_log2f_compat.c: Likewise. * math/w_log2l_compat.c: Likewise. * math/w_log_compat.c: Likewise. * math/w_logf_compat.c: Likewise. * math/w_logl_compat.c: Likewise. * sysdeps/aarch64/fpu/feholdexcpt.c: Likewise. * sysdeps/aarch64/fpu/fesetround.c: Likewise. * sysdeps/aarch64/fpu/fgetexcptflg.c: Likewise. * sysdeps/aarch64/fpu/ftestexcept.c: Likewise. * sysdeps/ieee754/dbl-64/e_atan2.c: Likewise. * sysdeps/ieee754/dbl-64/e_exp.c: Likewise. * sysdeps/ieee754/dbl-64/e_exp2.c: Likewise. * sysdeps/ieee754/dbl-64/e_gamma_r.c: Likewise. * sysdeps/ieee754/dbl-64/e_jn.c: Likewise. * sysdeps/ieee754/dbl-64/e_pow.c: Likewise. * sysdeps/ieee754/dbl-64/e_remainder.c: Likewise. * sysdeps/ieee754/dbl-64/e_sqrt.c: Likewise. * sysdeps/ieee754/dbl-64/gamma_product.c: Likewise. * sysdeps/ieee754/dbl-64/lgamma_neg.c: Likewise. * sysdeps/ieee754/dbl-64/s_atan.c: Likewise. * sysdeps/ieee754/dbl-64/s_fma.c: Likewise. * sysdeps/ieee754/dbl-64/s_fmaf.c: Likewise. * sysdeps/ieee754/dbl-64/s_llrint.c: Likewise. * sysdeps/ieee754/dbl-64/s_llround.c: Likewise. * sysdeps/ieee754/dbl-64/s_lrint.c: Likewise. * sysdeps/ieee754/dbl-64/s_lround.c: Likewise. * sysdeps/ieee754/dbl-64/s_nearbyint.c: Likewise. * sysdeps/ieee754/dbl-64/s_sin.c: Likewise. * sysdeps/ieee754/dbl-64/s_sincos.c: Likewise. * sysdeps/ieee754/dbl-64/s_tan.c: Likewise. * sysdeps/ieee754/dbl-64/wordsize-64/s_lround.c: Likewise. * sysdeps/ieee754/dbl-64/wordsize-64/s_nearbyint.c: Likewise. * sysdeps/ieee754/dbl-64/x2y2m1.c: Likewise. * sysdeps/ieee754/float128/float128_private.h: Likewise. * sysdeps/ieee754/flt-32/e_gammaf_r.c: Likewise. * sysdeps/ieee754/flt-32/e_j1f.c: Likewise. * sysdeps/ieee754/flt-32/e_jnf.c: Likewise. * sysdeps/ieee754/flt-32/lgamma_negf.c: Likewise. * sysdeps/ieee754/flt-32/s_llrintf.c: Likewise. * sysdeps/ieee754/flt-32/s_llroundf.c: Likewise. * sysdeps/ieee754/flt-32/s_lrintf.c: Likewise. * sysdeps/ieee754/flt-32/s_lroundf.c: Likewise. * sysdeps/ieee754/flt-32/s_nearbyintf.c: Likewise. * sysdeps/ieee754/k_standardl.c: Likewise. * sysdeps/ieee754/ldbl-128/e_expl.c: Likewise. * sysdeps/ieee754/ldbl-128/e_gammal_r.c: Likewise. * sysdeps/ieee754/ldbl-128/e_j1l.c: Likewise. * sysdeps/ieee754/ldbl-128/e_jnl.c: Likewise. * sysdeps/ieee754/ldbl-128/gamma_productl.c: Likewise. * sysdeps/ieee754/ldbl-128/lgamma_negl.c: Likewise. * sysdeps/ieee754/ldbl-128/s_fmal.c: Likewise. * sysdeps/ieee754/ldbl-128/s_llrintl.c: Likewise. * sysdeps/ieee754/ldbl-128/s_llroundl.c: Likewise. * sysdeps/ieee754/ldbl-128/s_lrintl.c: Likewise. * sysdeps/ieee754/ldbl-128/s_lroundl.c: Likewise. * sysdeps/ieee754/ldbl-128/s_nearbyintl.c: Likewise. * sysdeps/ieee754/ldbl-128/x2y2m1l.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/e_expl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/e_gammal_r.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/e_j1l.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/e_jnl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/lgamma_negl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_fmal.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_llrintl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_llroundl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_lrintl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_lroundl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_rintl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/x2y2m1l.c: Likewise. * sysdeps/ieee754/ldbl-96/e_gammal_r.c: Likewise. * sysdeps/ieee754/ldbl-96/e_jnl.c: Likewise. * sysdeps/ieee754/ldbl-96/gamma_productl.c: Likewise. * sysdeps/ieee754/ldbl-96/lgamma_negl.c: Likewise. * sysdeps/ieee754/ldbl-96/s_fma.c: Likewise. * sysdeps/ieee754/ldbl-96/s_fmal.c: Likewise. * sysdeps/ieee754/ldbl-96/s_llrintl.c: Likewise. * sysdeps/ieee754/ldbl-96/s_llroundl.c: Likewise. * sysdeps/ieee754/ldbl-96/s_lrintl.c: Likewise. * sysdeps/ieee754/ldbl-96/s_lroundl.c: Likewise. * sysdeps/ieee754/ldbl-96/x2y2m1l.c: Likewise. * sysdeps/powerpc/fpu/e_sqrt.c: Likewise. * sysdeps/powerpc/fpu/e_sqrtf.c: Likewise. * sysdeps/riscv/rv64/rvd/s_ceil.c: Likewise. * sysdeps/riscv/rv64/rvd/s_floor.c: Likewise. * sysdeps/riscv/rv64/rvd/s_nearbyint.c: Likewise. * sysdeps/riscv/rv64/rvd/s_round.c: Likewise. * sysdeps/riscv/rv64/rvd/s_roundeven.c: Likewise. * sysdeps/riscv/rv64/rvd/s_trunc.c: Likewise. * sysdeps/riscv/rvd/s_finite.c: Likewise. * sysdeps/riscv/rvd/s_fmax.c: Likewise. * sysdeps/riscv/rvd/s_fmin.c: Likewise. * sysdeps/riscv/rvd/s_fpclassify.c: Likewise. * sysdeps/riscv/rvd/s_isinf.c: Likewise. * sysdeps/riscv/rvd/s_isnan.c: Likewise. * sysdeps/riscv/rvd/s_issignaling.c: Likewise. * sysdeps/riscv/rvf/fegetround.c: Likewise. * sysdeps/riscv/rvf/feholdexcpt.c: Likewise. * sysdeps/riscv/rvf/fesetenv.c: Likewise. * sysdeps/riscv/rvf/fesetround.c: Likewise. * sysdeps/riscv/rvf/feupdateenv.c: Likewise. * sysdeps/riscv/rvf/fgetexcptflg.c: Likewise. * sysdeps/riscv/rvf/ftestexcept.c: Likewise. * sysdeps/riscv/rvf/s_ceilf.c: Likewise. * sysdeps/riscv/rvf/s_finitef.c: Likewise. * sysdeps/riscv/rvf/s_floorf.c: Likewise. * sysdeps/riscv/rvf/s_fmaxf.c: Likewise. * sysdeps/riscv/rvf/s_fminf.c: Likewise. * sysdeps/riscv/rvf/s_fpclassifyf.c: Likewise. * sysdeps/riscv/rvf/s_isinff.c: Likewise. * sysdeps/riscv/rvf/s_isnanf.c: Likewise. * sysdeps/riscv/rvf/s_issignalingf.c: Likewise. * sysdeps/riscv/rvf/s_nearbyintf.c: Likewise. * sysdeps/riscv/rvf/s_roundevenf.c: Likewise. * sysdeps/riscv/rvf/s_roundf.c: Likewise. * sysdeps/riscv/rvf/s_truncf.c: Likewise. |
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Paul Pluzhnikov
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a6e8926f8d | [BZ #20271] Add newlines in __libc_fatal calls. | ||
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Joseph Myers
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ff6b24501f |
Split fenv_private.h out of math_private.h more consistently.
On some architectures, the parts of math_private.h relating to the floating-point environment are in a separate file fenv_private.h included from math_private.h. As this is purely an architecture-specific convention used by several architectures, however, all such architectures still need their own math_private.h, even if it has nothing to do beyond #include <fenv_private.h> and peculiarity of including the i386 file directly instead of having a shared file in sysdeps/x86. This patch makes the fenv_private.h name an architecture-independent convention in glibc. The include of fenv_private.h from math_private.h becomes architecture-independent (until callers are updated to include fenv_private.h directly so the include from math_private.h is no longer needed). Some architecture math_private.h headers are removed if no longer needed, or renamed to fenv_private.h if all they define belongs in that header; architecture fenv_private.h headers now do require #include_next <fenv_private.h>. The i386 fenv_private.h file moves to sysdeps/x86/fpu/ to reflect how it is actually shared with x86_64. The generic math_private.h gets a new include of <stdbool.h>, as needed for bool in some prototypes in that header (previously that was indirectly included via include/fenv.h, which now only gets included too late in math_private.h, after those prototypes). Tested for x86_64 and x86, and tested with build-many-glibcs.py that installed stripped shared libraries are unchanged by the patch. * sysdeps/aarch64/fpu/fenv_private.h: New file. Based on .... * sysdeps/aarch64/fpu/math_private.h: ... this file. All contents moved to fenv_private.h except for ... (TOINT_INTRINSICS): Kept in math_private.h. (roundtoint): Likewise. (converttoint): Likewise. * sysdeps/arm/fenv_private.h: Change multiple-include guard to [ARM_FENV_PRIVATE_H]. Include next <fenv_private.h>. * sysdeps/arm/math_private.h: Remove. * sysdeps/generic/fenv_private.h: New file. Contents moved from .... * sysdeps/generic/math_private.h: ... this file. Include <stdbool.h>. Do not include <fenv.h> or <get-rounding-mode.h>. Include <fenv_private.h>. Remove functions and macros moved to fenv_private.h. * sysdeps/i386/fpu/math_private.h: Remove. * sysdeps/mips/math_private.h: Move to .... * sysdeps/mips/fpu/fenv_private.h: ... here. Change multiple-include guard to [MIPS_FENV_PRIVATE_H]. Remove [__mips_hard_float] conditional. Include next <fenv_private.h>. * sysdeps/powerpc/fpu/fenv_private.h: Change multiple-include guard to [POWERPC_FENV_PRIVATE_H]. Include next <fenv_private.h>. * sysdeps/powerpc/fpu/math_private.h: Do not include <fenv_private.h>. * sysdeps/riscv/rvf/math_private.h: Move to .... * sysdeps/riscv/rvf/fenv_private.h: ... here. Change multiple-include guard to [RISCV_FENV_PRIVATE_H]. Include next <fenv_private.h>. * sysdeps/sparc/fpu/fenv_private.h: Change multiple-include guard to [SPARC_FENV_PRIVATE_H]. Include next <fenv_private.h>. * sysdeps/sparc/fpu/math_private.h: Remove. * sysdeps/i386/fpu/fenv_private.h: Move to .... * sysdeps/x86/fpu/fenv_private.h: ... here. Change multiple-include guard to [X86_FENV_PRIVATE_H]. Include next <fenv_private.h>. * sysdeps/x86_64/fpu/math_private.h: Do not include <sysdeps/i386/fpu/fenv_private.h>. |
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Joseph Myers
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895ef79e04 |
Move EXCEPTION_ENABLE_SUPPORTED out of math-tests.h.
Continuing moving macros out of math-tests.h to smaller headers following typo-proof conventions instead of using #ifndef, this patch moves the EXCEPTION_ENABLE_SUPPORTED macro out to its own math-tests-trap.h header. Tested with build-many-glibcs.py. * sysdeps/generic/math-tests-trap.h: New file. * sysdeps/generic/math-tests.h: Include <math-tests-trap.h>. (EXCEPTION_ENABLE_SUPPORTED): Do not define here. * sysdeps/aarch64/math-tests.h: Remove file. * sysdeps/arm/math-tests.h: Likewise. * sysdeps/riscv/math-tests.h: Likewise. * sysdeps/aarch64/math-tests-trap.h: New file. * sysdeps/arm/math-tests-trap.h: Likewise. * sysdeps/riscv/math-tests-trap.h: Likewise. |
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Siddhesh Poyarekar
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436e4d5b96 |
[aarch64] Add an ASIMD variant of strlen for falkor
This variant of strlen uses vector loads and operations to reduce the size of the code and also eliminate the non-ascii fallback. This works very well for falkor because of its two vector units and efficient vector ops. In the best case it reduces latency of cases in bench-strlen by 48%, with gains throughout the benchmark. strlen-walk also sees uniform gains in the 5%-15% range. Overall the routine appears to work better than the stock one for falkor regardless of the benchmark, length of string or cache state. The same cannot be said of a53 and a72 though. a53 performance was greatly reduced and for a72 it was a bit of a mixed bag, slightly on the negative side but I reckon it might be fast in some situations. * sysdeps/aarch64/strlen.S (__strlen): Rename to STRLEN. [!STRLEN](STRLEN): Set to __strlen. * sysdeps/aarch64/multiarch/strlen.c: New file. * sysdeps/aarch64/multiarch/strlen_generic.S: Likewise. * sysdeps/aarch64/multiarch/strlen_asimd.S: Likewise. * sysdeps/aarch64/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Add strlen. * sysdeps/aarch64/multiarch/Makefile (sysdep_routines): Add strlen_generic and strlen_asimd. Reviewed-By: szabolcs.nagy@arm.com CC: pinskia@gmail.com |
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Wilco Dijkstra
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599cf39766 |
Improve performance of sinf and cosf
The second patch improves performance of sinf and cosf using the same algorithms and polynomials. The returned values are identical to sincosf for the same input. ULP definitions for AArch64 and x64 are updated. sinf/cosf througput gains on Cortex-A72: * |x| < 0x1p-12 : 1.2x * |x| < M_PI_4 : 1.8x * |x| < 2 * M_PI: 1.7x * |x| < 120.0 : 2.3x * |x| < Inf : 3.0x * NEWS: Mention sinf, cosf, sincosf. * sysdeps/aarch64/libm-test-ulps: Update ULP for sinf, cosf, sincosf. * sysdeps/x86_64/fpu/libm-test-ulps: Update ULP for sinf and cosf. * sysdeps/x86_64/fpu/multiarch/s_sincosf-fma.c: Add definitions of constants rather than including generic sincosf.h. * sysdeps/x86_64/fpu/s_sincosf_data.c: Remove. * sysdeps/ieee754/flt-32/s_cosf.c (cosf): Rewrite. * sysdeps/ieee754/flt-32/s_sincosf.h (reduced_sin): Remove. (reduced_cos): Remove. (sinf_poly): New function. * sysdeps/ieee754/flt-32/s_sinf.c (sinf): Rewrite. |
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Szabolcs Nagy
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43cfdf8f48 |
Clean up converttoint handling and document the semantics
This patch currently only affects aarch64. The roundtoint and converttoint internal functions are only called with small values, so 32 bit result is enough for converttoint and it is a signed int conversion so the return type is changed to int32_t. The original idea was to help the compiler keeping the result in uint64_t, then it's clear that no sign extension is needed and there is no accidental undefined or implementation defined signed int arithmetics. But it turns out gcc does a good job with inlining so changing the type has no overhead and the semantics of the conversion is less surprising this way. Since we want to allow the asuint64 (x + 0x1.8p52) style conversion, the top bits were never usable and the existing code ensures that only the bottom 32 bits of the conversion result are used. On aarch64 the neon intrinsics (which round ties to even) are changed to round and lround (which round ties away from zero) this does not affect the results in a significant way, but more portable (relies on round and lround being inlined which works with -fno-math-errno). The TOINT_SHIFT and TOINT_RINT macros were removed, only keep separate code paths for TOINT_INTRINSICS and !TOINT_INTRINSICS. * sysdeps/aarch64/fpu/math_private.h (roundtoint): Use round. (converttoint): Use lround. * sysdeps/ieee754/flt-32/math_config.h (roundtoint): Declare and document the semantics when TOINT_INTRINSICS is set. (converttoint): Likewise. (TOINT_RINT): Remove. (TOINT_SHIFT): Remove. * sysdeps/ieee754/flt-32/e_expf.c (__expf): Remove the TOINT_RINT code path. |
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Siddhesh Poyarekar
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be64b1946b |
[aarch64] Fix value of MIN_PAGE_SIZE for testing
MIN_PAGE_SIZE is normally set to 4096 but for testing it can be set to 16 so that it exercises the page crossing code for every misaligned access. The value was set to 15, which is obviously wrong, so fixed as obvious and tested. * sysdeps/aarch64/strlen.S [TEST_PAGE_CROSS](MIN_PAGE_SIZE): Fix value. |
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Siddhesh Poyarekar
|
dce452dc52 |
Rename the glibc.tune namespace to glibc.cpu
The glibc.tune namespace is vaguely named since it is a 'tunable', so give it a more specific name that describes what it refers to. Rename the tunable namespace to 'cpu' to more accurately reflect what it encompasses. Also rename glibc.tune.cpu to glibc.cpu.name since glibc.cpu.cpu is weird. * NEWS: Mention the change. * elf/dl-tunables.list: Rename tune namespace to cpu. * sysdeps/powerpc/dl-tunables.list: Likewise. * sysdeps/x86/dl-tunables.list: Likewise. * sysdeps/aarch64/dl-tunables.list: Rename tune.cpu to cpu.name. * elf/dl-hwcaps.c (_dl_important_hwcaps): Adjust. * elf/dl-hwcaps.h (GET_HWCAP_MASK): Likewise. * manual/README.tunables: Likewise. * manual/tunables.texi: Likewise. * sysdeps/powerpc/cpu-features.c: Likewise. * sysdeps/unix/sysv/linux/aarch64/cpu-features.c (init_cpu_features): Likewise. * sysdeps/x86/cpu-features.c: Likewise. * sysdeps/x86/cpu-features.h: Likewise. * sysdeps/x86/cpu-tunables.c: Likewise. * sysdeps/x86_64/Makefile: Likewise. * sysdeps/x86/dl-cet.c: Likewise. Reviewed-by: Carlos O'Donell <carlos@redhat.com> |
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Siddhesh Poyarekar
|
0aec4c1d18 |
aarch64,falkor: Use vector registers for memcpy
Vector registers perform better than scalar register pairs for copying data so prefer them instead. This results in a time reduction of over 50% (i.e. 2x speed improvemnet) for some smaller sizes for memcpy-walk. Larger sizes show improvements of around 1% to 2%. memcpy-random shows a very small improvement, in the range of 1-2%. * sysdeps/aarch64/multiarch/memcpy_falkor.S (__memcpy_falkor): Use vector registers. |
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Siddhesh Poyarekar
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ce76a5cb8d |
aarch64,falkor: Use vector registers for memmove
Vector registers perform much better for moves compared to pairs of registers on falkor, so use them instead. This results in a time reduction of up to 50% (i.e. 2x improvement) for a lot of the smaller sizes, i.e. up to 1K in memmove-walk. Improvements for larger sizes are smaller, at about 1%-2%. * sysdeps/aarch64/multiarch/memmove_falkor.S (__memcpy_falkor): Use vector registers. |
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Hongbo Zhang
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fc2ba8037d |
aarch64: add HXT Phecda core memory operation ifuncs
Phecda is HXT semiconductor's CPU core, this patch adds memory operation ifuncs for it: sharing the same optimized implementation with Qualcomm's Falkor core. 2018-06-07 Minfeng Kang <minfeng.kang@hxt-semitech.com> Hongbo Zhang <hongbo.zhang@linaro.org> * sysdeps/aarch64/multiarch/memcpy.c (libc_ifunc): reuse __memcpy_falkor for phecda core. * sysdeps/aarch64/multiarch/memmove.c (libc_ifunc): reuse __memmove_falkor for phecda core. * sysdeps/aarch64/multiarch/memset.c (libc_ifunc): reuse __memset_falkor for phecda core. * sysdeps/unix/sysv/linux/aarch64/cpu-features.c: add MIDR entry for phecda core. * sysdeps/unix/sysv/linux/aarch64/cpu-features.h (IS_PHECDA): add macro to identify phecda core. |
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H.J. Lu
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67c0579669 |
Mark _init and _fini as hidden [BZ #23145]
_init and _fini are special functions provided by glibc for linker to define DT_INIT and DT_FINI in executable and shared library. They should never be put in dynamic symbol table. This patch marks them as hidden to remove them from dynamic symbol table. Tested with build-many-glibcs.py. [BZ #23145] * elf/Makefile (tests-special): Add $(objpfx)check-initfini.out. ($(all-built-dso:=.dynsym): New target. (common-generated): Add $(all-built-dso:$(common-objpfx)%=%.dynsym). ($(objpfx)check-initfini.out): New target. (generated): Add check-initfini.out. * scripts/check-initfini.awk: New file. * sysdeps/aarch64/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/alpha/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/arm/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/hppa/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/i386/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/ia64/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/m68k/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/microblaze/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/mips/mips32/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/mips/mips64/n32/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/mips/mips64/n64/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/nios2/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/powerpc/powerpc32/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/powerpc/powerpc64/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/s390/s390-32/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/s390/s390-64/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/sh/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/sparc/crti.S (_init): Mark as hidden. (_fini): Likewise. * sysdeps/x86_64/crti.S (_init): Mark as hidden. (_fini): Likewise. |
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Joseph Myers
|
8f145c7712 |
Remove sysdeps/aarch64/soft-fp directory.
As per <https://sourceware.org/ml/libc-alpha/2014-10/msg00369.html>, there should not be separate sysdeps/<arch>/soft-fp directories when those are used by all configurations that use sysdeps/<arch>, and, more generally, should not be sysdeps/foo/Implies files pointing to a subdirectory foo/bar. This patch eliminates the sysdeps/aarch64/soft-fp directory accordingly, merging its contents into sysdeps/aarch64. Tested with build-many-glibcs.py that installed stripped shared libraries for aarch64 configurations are unchanged by this patch. * sysdeps/aarch64/Implies: Remove aarch64/soft-fp. * sysdeps/aarch64/Makefile [$(subdir) = math] (CPPFLAGS): Add -I../soft-fp. Moved from .... * sysdeps/aarch64/soft-fp/Makefile: ... here. Remove file. * sysdeps/aarch64/soft-fp/e_sqrtl.c: Move to .... * sysdeps/aarch64/e_sqrtl.c: ... here. * sysdeps/aarch64/soft-fp/sfp-machine.h: Move to .... * sysdeps/aarch64/sfp-machine.h: ... here. |
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Joseph Myers
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b4d5b8b021 |
Do not include math-barriers.h in math_private.h.
This patch continues the math_private.h cleanup by stopping math_private.h from including math-barriers.h and making the users of the barrier macros include the latter header directly. No attempt is made to remove any math_private.h includes that are now unused, except in strtod_l.c where that is done to avoid line number changes in assertions, so that installed stripped shared libraries can be compared before and after the patch. (I think the floating-point environment support in math_private.h should also move out - some architectures already have fenv_private.h as an architecture-internal header included from their math_private.h - and after moving that out might be a better time to identify unused math_private.h includes.) Tested for x86_64 and x86, and tested with build-many-glibcs.py that installed stripped shared libraries are unchanged by the patch. * sysdeps/generic/math_private.h: Do not include <math-barriers.h>. * stdlib/strtod_l.c: Include <math-barriers.h> instead of <math_private.h>. * math/fromfp.h: Include <math-barriers.h>. * math/math-narrow.h: Likewise. * math/s_nextafter.c: Likewise. * math/s_nexttowardf.c: Likewise. * sysdeps/aarch64/fpu/s_llrint.c: Likewise. * sysdeps/aarch64/fpu/s_llrintf.c: Likewise. * sysdeps/aarch64/fpu/s_lrint.c: Likewise. * sysdeps/aarch64/fpu/s_lrintf.c: Likewise. * sysdeps/i386/fpu/s_nextafterl.c: Likewise. * sysdeps/i386/fpu/s_nexttoward.c: Likewise. * sysdeps/i386/fpu/s_nexttowardf.c: Likewise. * sysdeps/ieee754/dbl-64/e_atan2.c: Likewise. * sysdeps/ieee754/dbl-64/e_atanh.c: Likewise. * sysdeps/ieee754/dbl-64/e_exp.c: Likewise. * sysdeps/ieee754/dbl-64/e_exp2.c: Likewise. * sysdeps/ieee754/dbl-64/e_j0.c: Likewise. * sysdeps/ieee754/dbl-64/e_sqrt.c: Likewise. * sysdeps/ieee754/dbl-64/s_expm1.c: Likewise. * sysdeps/ieee754/dbl-64/s_fma.c: Likewise. * sysdeps/ieee754/dbl-64/s_fmaf.c: Likewise. * sysdeps/ieee754/dbl-64/s_log1p.c: Likewise. * sysdeps/ieee754/dbl-64/s_nearbyint.c: Likewise. * sysdeps/ieee754/dbl-64/wordsize-64/s_nearbyint.c: Likewise. * sysdeps/ieee754/flt-32/e_atanhf.c: Likewise. * sysdeps/ieee754/flt-32/e_j0f.c: Likewise. * sysdeps/ieee754/flt-32/s_expm1f.c: Likewise. * sysdeps/ieee754/flt-32/s_log1pf.c: Likewise. * sysdeps/ieee754/flt-32/s_nearbyintf.c: Likewise. * sysdeps/ieee754/flt-32/s_nextafterf.c: Likewise. * sysdeps/ieee754/k_standardl.c: Likewise. * sysdeps/ieee754/ldbl-128/e_asinl.c: Likewise. * sysdeps/ieee754/ldbl-128/e_expl.c: Likewise. * sysdeps/ieee754/ldbl-128/e_powl.c: Likewise. * sysdeps/ieee754/ldbl-128/s_fmal.c: Likewise. * sysdeps/ieee754/ldbl-128/s_nearbyintl.c: Likewise. * sysdeps/ieee754/ldbl-128/s_nextafterl.c: Likewise. * sysdeps/ieee754/ldbl-128/s_nexttoward.c: Likewise. * sysdeps/ieee754/ldbl-128/s_nexttowardf.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/e_asinl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_fmal.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_nextafterl.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_nexttoward.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_nexttowardf.c: Likewise. * sysdeps/ieee754/ldbl-128ibm/s_rintl.c: Likewise. * sysdeps/ieee754/ldbl-96/e_atanhl.c: Likewise. * sysdeps/ieee754/ldbl-96/e_j0l.c: Likewise. * sysdeps/ieee754/ldbl-96/s_fma.c: Likewise. * sysdeps/ieee754/ldbl-96/s_fmal.c: Likewise. * sysdeps/ieee754/ldbl-96/s_nexttoward.c: Likewise. * sysdeps/ieee754/ldbl-96/s_nexttowardf.c: Likewise. * sysdeps/ieee754/ldbl-opt/s_nexttowardfd.c: Likewise. * sysdeps/m68k/m680x0/fpu/s_nextafterl.c: Likewise. |
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Siddhesh Poyarekar
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db725a458e |
aarch64,falkor: Ignore prefetcher tagging for smaller copies
For smaller and medium sized copies, the effect of hardware prefetching are not as dominant as instruction level parallelism. Hence it makes more sense to load data into multiple registers than to try and route them to the same prefetch unit. This is also the case for the loop exit where we are unable to latch on to the same prefetch unit anyway so it makes more sense to have data loaded in parallel. The performance results are a bit mixed with memcpy-random, with numbers jumping between -1% and +3%, i.e. the numbers don't seem repeatable. memcpy-walk sees a 70% improvement (i.e. > 2x) for 128 bytes and that improvement reduces down as the impact of the tail copy decreases in comparison to the loop. * sysdeps/aarch64/multiarch/memcpy_falkor.S (__memcpy_falkor): Use multiple registers to copy data in loop tail. |
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Siddhesh Poyarekar
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70c97f8493 |
aarch64,falkor: Ignore prefetcher hints for memmove tail
The tail of the copy loops are unable to train the falkor hardware prefetcher because they load from a different base compared to the hot loop. In this case avoid serializing the instructions by loading them into different registers. Also peel the last iteration of the loop into the tail (and have them use different registers) since it gives better performance for medium sizes. This results in performance improvements of between 3% and 20% over the current falkor implementation for sizes between 128 bytes and 1K on the memmove-walk benchmark, thus mostly covering the regressions seen against the generic memmove. * sysdeps/aarch64/multiarch/memmove_falkor.S (__memmove_falkor): Use multiple registers to move data in loop tail. |
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Joseph Myers
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9ed2e15ff4 |
Move math_opt_barrier, math_force_eval to separate math-barriers.h.
This patch continues cleaning up math_private.h by moving the math_opt_barrier and math_force_eval macros to a separate header math-barriers.h. At present, those macros are inside a "#ifndef math_opt_barrier" in math_private.h to allow architectures to override them and then use a separate math-barriers.h header, no such #ifndef or #include_next is needed; architectures just have their own alternative version of math-barriers.h when providing their own optimized versions that avoid going through memory unnecessarily. The generic math-barriers.h has a comment added to document these two macros. In this patch, math_private.h is made to #include <math-barriers.h>, so files using these macros do not need updating yet. That is because of uses of math_force_eval in math_check_force_underflow and math_check_force_underflow_nonneg, which are still defined in math_private.h. Once those are moved out to a separate header, that separate header can be made to include <math-barriers.h>, as can the other files directly using these barrier macros, and then the include of <math-barriers.h> from math_private.h can be removed. Tested for x86_64 and x86. Also tested with build-many-glibcs.py that installed stripped shared libraries are unchanged by this patch. * sysdeps/generic/math-barriers.h: New file. * sysdeps/generic/math_private.h [!math_opt_barrier] (math_opt_barrier): Move to math-barriers.h. [!math_opt_barrier] (math_force_eval): Likewise. * sysdeps/aarch64/fpu/math-barriers.h: New file. * sysdeps/aarch64/fpu/math_private.h (math_opt_barrier): Move to math-barriers.h. (math_force_eval): Likewise. * sysdeps/alpha/fpu/math-barriers.h: New file. * sysdeps/alpha/fpu/math_private.h (math_opt_barrier): Move to math-barriers.h. (math_force_eval): Likewise. * sysdeps/x86/fpu/math-barriers.h: New file. * sysdeps/i386/fpu/fenv_private.h (math_opt_barrier): Move to math-barriers.h. (math_force_eval): Likewise. * sysdeps/m68k/m680x0/fpu/math_private.h: Move to.... * sysdeps/m68k/m680x0/fpu/math-barriers.h: ... here. Adjust multiple-include guard for rename. * sysdeps/powerpc/fpu/math-barriers.h: New file. * sysdeps/powerpc/fpu/math_private.h (math_opt_barrier): Move to math-barriers.h. (math_force_eval): Likewise. |
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Maciej W. Rozycki
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10a446ddcc |
elf: Unify symbol address run-time calculation [BZ #19818]
Wrap symbol address run-time calculation into a macro and use it throughout, replacing inline calculations. There are a couple of variants, most of them different in a functionally insignificant way. Most calculations are right following RESOLVE_MAP, at which point either the map or the symbol returned can be checked for validity as the macro sets either both or neither. In some places both the symbol and the map has to be checked however. My initial implementation therefore always checked both, however that resulted in code larger by as much as 0.3%, as many places know from elsewhere that no check is needed. I have decided the size growth was unacceptable. Having looked closer I realized that it's the map that is the culprit. Therefore I have modified LOOKUP_VALUE_ADDRESS to accept an additional boolean argument telling it to access the map without checking it for validity. This in turn has brought quite nice results, with new code actually being smaller for i686, and MIPS o32, n32 and little-endian n64 targets, unchanged in size for x86-64 and, unusually, marginally larger for big-endian MIPS n64, as follows: i686: text data bss dec hex filename 152255 4052 192 156499 26353 ld-2.27.9000-base.so 152159 4052 192 156403 262f3 ld-2.27.9000-elf-symbol-value.so MIPS/o32/el: text data bss dec hex filename 142906 4396 260 147562 2406a ld-2.27.9000-base.so 142890 4396 260 147546 2405a ld-2.27.9000-elf-symbol-value.so MIPS/n32/el: text data bss dec hex filename 142267 4404 260 146931 23df3 ld-2.27.9000-base.so 142171 4404 260 146835 23d93 ld-2.27.9000-elf-symbol-value.so MIPS/n64/el: text data bss dec hex filename 149835 7376 408 157619 267b3 ld-2.27.9000-base.so 149787 7376 408 157571 26783 ld-2.27.9000-elf-symbol-value.so MIPS/o32/eb: text data bss dec hex filename 142870 4396 260 147526 24046 ld-2.27.9000-base.so 142854 4396 260 147510 24036 ld-2.27.9000-elf-symbol-value.so MIPS/n32/eb: text data bss dec hex filename 142019 4404 260 146683 23cfb ld-2.27.9000-base.so 141923 4404 260 146587 23c9b ld-2.27.9000-elf-symbol-value.so MIPS/n64/eb: text data bss dec hex filename 149763 7376 408 157547 2676b ld-2.27.9000-base.so 149779 7376 408 157563 2677b ld-2.27.9000-elf-symbol-value.so x86-64: text data bss dec hex filename 148462 6452 400 155314 25eb2 ld-2.27.9000-base.so 148462 6452 400 155314 25eb2 ld-2.27.9000-elf-symbol-value.so [BZ #19818] * sysdeps/generic/ldsodefs.h (LOOKUP_VALUE_ADDRESS): Add `set' parameter. (SYMBOL_ADDRESS): New macro. [!ELF_FUNCTION_PTR_IS_SPECIAL] (DL_SYMBOL_ADDRESS): Use SYMBOL_ADDRESS for symbol address calculation. * elf/dl-runtime.c (_dl_fixup): Likewise. (_dl_profile_fixup): Likewise. * elf/dl-symaddr.c (_dl_symbol_address): Likewise. * elf/rtld.c (dl_main): Likewise. * sysdeps/aarch64/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/alpha/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/arm/dl-machine.h (elf_machine_rel): Likewise. (elf_machine_rela): Likewise. * sysdeps/hppa/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/hppa/dl-symaddr.c (_dl_symbol_address): Likewise. * sysdeps/i386/dl-machine.h (elf_machine_rel): Likewise. (elf_machine_rela): Likewise. * sysdeps/ia64/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/m68k/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/microblaze/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/mips/dl-machine.h (ELF_MACHINE_BEFORE_RTLD_RELOC): Likewise. (elf_machine_reloc): Likewise. (elf_machine_got_rel): Likewise. * sysdeps/mips/dl-trampoline.c (__dl_runtime_resolve): Likewise. * sysdeps/nios2/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/powerpc/powerpc32/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/powerpc/powerpc64/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/riscv/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/s390/s390-32/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/s390/s390-64/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/sh/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/sparc/sparc32/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/sparc/sparc64/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/tile/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/x86_64/dl-machine.h (elf_machine_rela): Likewise. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> |
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Wilco Dijkstra
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19a8b9a300 |
[PATCH 1/7] sin/cos slow paths: avoid slow paths for small inputs
This series of patches removes the slow patchs from sin, cos and sincos. Besides greatly simplifying the implementation, the new version is also much faster for inputs up to PI (41% faster) and for large inputs needing range reduction (27% faster). ULP is ~0.55 with no errors found after testing 1.6 billion inputs across most of the range with mpsin and mpcos. The number of incorrectly rounded results (ie. ULP >0.5) is at most ~2750 per million inputs between 0.125 and 0.5, the average is ~850 per million between 0 and PI. Tested on AArch64 and x86_64 with no regressions. The first patch removes the slow paths for the cases where the input is small and doesn't require range reduction. Update ULP tables for sin, cos and sincos on AArch64 and x86_64. * sysdeps/aarch64/libm-test-ulps: Update ULP for sin, cos, sincos. * sysdeps/ieee754/dbl-64/s_sin.c (__sin): Remove slow paths for small inputs. (__cos): Likewise. * sysdeps/x86_64/fpu/libm-test-ulps: Update ULP for sin, cos, sincos. |
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Joseph Myers
|
ffec7b2740 |
Use x86_64 backtrace as generic version.
No glibc configuration uses the present debug/backtrace.c, whereas several #include the x86_64 version. The x86_64 version is effectively a generic one (using _Unwind_Backtrace from libgcc, which works much more reliably than the built-in functions used by debug/backtrace.c). This patch moves it to debug/backtrace.c and removes all the #includes of the x86_64 version from other architectures which are no longer required. I do not know whether all the other architecture-specific backtrace implementations that are based on _Unwind_Backtrace are required, or whether, where their differences from the generic version do something useful, suitable hooks could be added to the generic version to reduce the duplication involved. Tested with build-many-glibcs.py that installed stripped shared libraries are unchanged by this patch. * sysdeps/x86_64/backtrace.c: Move to .... * debug/backtrace.c: ... here. * sysdeps/aarch64/backtrace.c: Remove file. * sysdeps/alpha/backtrace.c: Likewise. * sysdeps/hppa/backtrace.c: Likewise. * sysdeps/ia64/backtrace.c: Likewise. * sysdeps/mips/backtrace.c: Likewise. * sysdeps/nios2/backtrace.c: Likewise. * sysdeps/riscv/backtrace.c: Likewise. * sysdeps/sh/backtrace.c: Likewise. * sysdeps/tile/backtrace.c: Likewise. |
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Wilco Dijkstra
|
700593fdd7 |
Remove all target specific __ieee754_sqrt(f/l) inlines
Remove the now unused target specific__ieee754_sqrt(f/l) inlines. Also remove inlines of sqrt which are for really old GCC versions. Removing these is desirable, under the general principle of leaving such inlining to the compiler rather than trying to do it in installed headers, especially when only very old compilers are affected. Note that removing inlines for __ieee754_sqrt disables inlining in the sqrt wrapper functions. Given the sqrt function will typically only be called for negative arguments, it doesn't matter whether the inlining happens or not. * sysdeps/aarch64/fpu/math_private.h (__ieee754_sqrt): Remove. (__ieee754_sqrtf): Remove. * sysdeps/alpha/fpu/math_private.h (__ieee754_sqrt): Remove. (__ieee754_sqrtf): Remove. * sysdeps/generic/math-type-macros.h (M_SQRT): Use sqrt. * sysdeps/m68k/m680x0/fpu/mathimpl.h (__ieee754_sqrt): Remove. * sysdeps/powerpc/fpu/math_private.h (__ieee754_sqrt): Remove. (__ieee754_sqrtf): Remove. * sysdeps/s390/fpu/bits/mathinline.h: Remove file. * sysdeps/sparc/fpu/bits/mathinline.h (sqrt) Remove. (sqrtf): Remove. (sqrtl): Remove. (__ieee754_sqrt): Remove. (__ieee754_sqrtf): Remove. (__ieee754_sqrtl): Remove. * sysdeps/m68k/m680x0/fpu/mathimpl.h (__ieee754_sqrt): Remove. * sysdeps/x86/fpu/math_private.h (__ieee754_sqrt): Remove. * sysdeps/x86_64/fpu/math_private.h (__ieee754_sqrt): Remove. (__ieee754_sqrtf): Remove. (__ieee754_sqrtl): Remove. |
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Siddhesh Poyarekar
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b47c3e7637 |
aarch64/strncmp: Use lsr instead of mov+lsr
A lsr can do what the mov and lsr did. |
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Siddhesh Poyarekar
|
d46f84de74 |
aarch64/strncmp: Unbreak builds with old binutils
Binutils 2.26.* and older do not support moves with shifted registers, so use a separate shift instruction instead. |
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Siddhesh Poyarekar
|
7108f1f944 |
aarch64: Improve strncmp for mutually misaligned inputs
The mutually misaligned inputs on aarch64 are compared with a simple byte copy, which is not very efficient. Enhance the comparison similar to strcmp by loading a double-word at a time. The peak performance improvement (i.e. 4k maxlen comparisons) due to this on the strncmp microbenchmark is as follows: falkor: 3.5x (up to 72% time reduction) cortex-a73: 3.5x (up to 71% time reduction) cortex-a53: 3.5x (up to 71% time reduction) All mutually misaligned inputs from 16 bytes maxlen onwards show upwards of 15% improvement and there is no measurable effect on the performance of aligned/mutually aligned inputs. * sysdeps/aarch64/strncmp.S (count): New macro. (strncmp): Store misaligned length in SRC1 in COUNT. (mutual_align): Adjust. (misaligned8): Load dword at a time when it is safe. |
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Samuel Thibault
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a5df0318ef |
hurd: add gscope support
* elf/dl-support.c [!THREAD_GSCOPE_IN_TCB] (_dl_thread_gscope_count): Define variable. * sysdeps/generic/ldsodefs.h [!THREAD_GSCOPE_IN_TCB] (struct rtld_global): Add _dl_thread_gscope_count member. * sysdeps/mach/hurd/tls.h: Include <atomic.h>. [!defined __ASSEMBLER__] (THREAD_GSCOPE_GLOBAL, THREAD_GSCOPE_SET_FLAG, THREAD_GSCOPE_RESET_FLAG, THREAD_GSCOPE_WAIT): Define macros. * sysdeps/generic/tls.h: Document THREAD_GSCOPE_IN_TCB. * sysdeps/aarch64/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1. * sysdeps/alpha/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1. * sysdeps/arm/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1. * sysdeps/hppa/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1. * sysdeps/i386/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1. * sysdeps/ia64/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1. * sysdeps/m68k/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1. * sysdeps/microblaze/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1. * sysdeps/mips/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1. * sysdeps/nios2/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1. * sysdeps/powerpc/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1. * sysdeps/riscv/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1. * sysdeps/s390/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1. * sysdeps/sh/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1. * sysdeps/sparc/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1. * sysdeps/tile/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1. * sysdeps/x86_64/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1. |
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Siddhesh Poyarekar
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4e54d91863 |
aarch64: Fix branch target to loop16
I goofed up when changing the loop8 name to loop16 and missed on out the branch instance. Fixed and actually build tested this time. * sysdeps/aarch64/memcmp.S (more16): Fix branch target loop16. |
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Siddhesh Poyarekar
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30a81dae5b |
aarch64: Optimized memcmp for medium to large sizes
This improved memcmp provides a fast path for compares up to 16 bytes and then compares 16 bytes at a time, thus optimizing loads from both sources. The glibc memcmp microbenchmark retains performance (with an error of ~1ns) for smaller compare sizes and reduces up to 31% of execution time for compares up to 4K on the APM Mustang. On Qualcomm Falkor this improves to almost 48%, i.e. it is almost 2x improvement for sizes of 2K and above. * sysdeps/aarch64/memcmp.S: Widen comparison to 16 bytes at a time. |