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* Fix x86/x86_64 expm1l spurious underflow exceptions (bug 16539).Joseph Myers2014-06-242-0/+20
| | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes bug 16539, spurious underflow exceptions from x86 / x86-64 expm1l. The problem is that the computation of a base-2 exponent with extra precision involves spurious underflows for arguments that are small but not subnormal, so a check is added to just return the argument in those cases. (If the argument *is* subnormal, underflowing is correct and the existing code will always underflow, so it suffices to keep using the existing code in that case; some expm1 implementations have a bug (bug 16353) with missing underflow exceptions, but I don't think there's such a bug in this particular version.) Tested x86_64 and x86; no ulps updates needed. (auto-libm-test-out diffs omitted below.) [BZ #16539] * sysdeps/i386/fpu/e_expl.S (IEEE754_EXPL) [USE_AS_EXPM1L]: Just return the argument for normal arguments with exponent below -64. * sysdeps/x86_64/fpu/e_expl.S (IEEE754_EXPL) [USE_AS_EXPM1L]: Likewise. * math/auto-libm-test-in: Add another test of expm1. * math/auto-libm-test-out: Regenerated.
* Fix ldbl-128 erfl spurious underflows (bug 16287).Joseph Myers2014-06-241-0/+2
| | | | | | | | | | | | | | | | | | | | This patch fixes bug 16287, spurious underflows from ldbl-128 erfl arising from it calling erfcl for arguments with absolute value at least 1.0, although for large positive arguments erfcl correctly underflows but erfl shouldn't. The fix is simply to avoid calling erfcl, and just return 1, for arguments above a cut-off large enough that erfl correctly rounds to-nearest as 1 but not so large that erfcl underflows. Tested mips64. Also tested x86_64 and x86 to confirm the new tests (taken from the tests of erfc) don't cause any problems there; no ulps updates needed. [BZ #16287] * sysdeps/ieee754/ldbl-128/s_erfl.c (__erfl): Return 1 without calling __erfcl for arguments at least 16. * math/auto-libm-test-in: Add more tests of erf. * math/auto-libm-test-out: Regenerated.
* Move architecture cases out of sysdeps/unix/sysv/linux/configure.ac.Joseph Myers2014-06-2416-120/+60
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Continuing the process of making non-ex-ports architectures follow the preferred sysdeps practices followed by ex-ports architectures - that is, putting things in architecture-specific sysdeps files rather than having architecture-specific cases in architecture-independent files - this patch moves architecture cases out of sysdeps/unix/sysv/linux/configure.ac into (new or existing) configure fragments for each architecture. (In the case of the arch_minimum_kernel setting for x32, sysdeps/unix/sysv/linux/x86_64/x32/configure already has such a setting so the setting in sysdeps/unix/sysv/linux/configure.ac was a duplicate that could just be removed - though I haven't tested for x32.) Tested for x86_64 and x86 that the patch causes no changes to the installed shared libraries or ldd (or any part of the installation except for the parts that always change because the files contain timestamps - nscd and static libraries). * sysdeps/unix/sysv/linux/configure.ac: Remove cases for individual architectures. * sysdeps/unix/sysv/linux/configure: Regenerated. * sysdeps/unix/sysv/linux/i386/configure.ac: New file. * sysdeps/unix/sysv/linux/i386/configure: New generated file. * sysdeps/unix/sysv/linux/powerpc/configure.ac (ldd_rewrite_script): Define variable. * sysdeps/unix/sysv/linux/powerpc/configure: Regenerated. * sysdeps/unix/sysv/linux/powerpc/powerpc32/configure.ac: New file. * sysdeps/unix/sysv/linux/powerpc/powerpc32/configure: New generated file. * sysdeps/unix/sysv/linux/s390/configure.ac: New file. * sysdeps/unix/sysv/linux/s390/configure: New generated file. * sysdeps/unix/sysv/linux/sh/configure.ac: New file. * sysdeps/unix/sysv/linux/sh/configure: New generated file. * sysdeps/unix/sysv/linux/sparc/configure.ac: New file. * sysdeps/unix/sysv/linux/sparc/configure: New generated file. * sysdeps/unix/sysv/linux/x86_64/configure.ac: New file. * sysdeps/unix/sysv/linux/x86_64/configure: New generated file.
* Fix namespace violation in pthreadtypes.h (BZ #17084)Siddhesh Poyarekar2014-06-241-3/+3
| | | | This was causing conformtest failures on i386.
* Optimize fesetenvWilco2014-06-241-15/+20
| | | | | | | | | Improve fesetenv to use an optimized implementation similar to feupdateenv. 2014-06-24 Wilco <wdijkstr@arm.com> * sysdeps/arm/fesetenv.c (fesetenv): Optimize implementation.
* Add _FPU_MASK_RM and use it instead of FE_TOWARDZERO.Wilco2014-06-244-13/+12
| | | | | | | | | | | | | 2014-06-24 Wilco <wdijkstr@arm.com> * sysdeps/arm/fpu_control.h (_FPU_MASK_RM): Define. * sysdeps/arm/fenv_private.h (libc_fesetround_vfp) (libc_feholdexcept_setround_vfp) (libc_feholdsetround_vfp) (libc_feresetround_vfp) (libc_feholdsetround_vfp_ctx) (libc_feresetround_vfp_ctx): Use _FPU_MASK_RM. * sysdeps/arm/fesetround.c (fesetround): Use _FPU_MASK_RM. * sysdeps/arm/get-rounding-mode.h (get_rounding_mode): Use _FPU_MASK_RM.
* Remove an unused include.Wilco2014-06-241-1/+0
| | | | | | 2014-06-24 Wilco <wdijkstr@arm.com> * sysdeps/arm/fsetexcptflg.c (fesetexceptflag): Remove unused include.
* Cleanup fenv implementationWilco2014-06-244-4/+0
| | | | | | | | | | | Remove some spaces before libm_hidden_def. 2014-06-24 Wilco <wdijkstr@arm.com> * sysdeps/arm/feholdexcpt.c (feholdexcept): Remove space. * sysdeps/arm/fesetenv.c (fesetenv): Remove space. * sysdeps/arm/fesetround.c (fesetround): Remove space. * sysdeps/arm/fraiseexcpt.c (feraiseexcept): Remove space.
* Rewrite feupdateenvWilco2014-06-241-6/+38
| | | | | | | | | | | | This patch rewrites feupdateenv to improve performance by avoiding unnecessary FPSCR reads/writes. It fixes bug 16918 by passing the correct return value. 2014-06-24 Wilco <wdijkstr@arm.com> [BZ #16918] * sysdeps/arm/feupdateenv.c (feupdateenv): Rewrite to reduce FPSCR accesses and fix return value.
* Speed up the ARM fenv implementation by avoiding unnecessary FPSCRWilco2014-06-245-23/+29
| | | | | | | | | | | | | writes if the FPSCR remains unchanged. 2014-06-24 Wilco <wdijkstr@arm.com> * sysdeps/arm/fclrexcpt.c (feclearexcept): Optimize to avoid unnecessary FPSCR writes. * sysdeps/arm/fedisblxcpt.c (fedisableexcept): Likewise. * sysdeps/arm/feenablxcpt.c (feenableexcept): Likewise. * sysdeps/arm/fsetexcptflg.c (fesetexceptflag): Likewise. * sysdeps/arm/setfpucw.c (__setfpucw): Likewise.
* Use libc calls defined by fenv_private.h to implement several fenv functionsWilco2014-06-246-102/+64
| | | | | | | | | | | | | | | | rather than duplicating functionality. To make this work for softfp builds, ensure functions in fenv_private are not conditionally compiled. 2014-06-24 Wilco <wdijkstr@arm.com> * sysdeps/arm/fegetround.c (fegetround): Call get_rounding_mode. * sysdeps/arm/feholdexcpt.c (feholdexcept): Call libc_feholdexcept_vfp. * sysdeps/arm/fesetround.c (fesetround): Call libc_fesetround_vfp. * sysdeps/arm/fgetexcptflg.c (fegetexceptflag): Call libc_fetestexcept_vfp. * sysdeps/arm/ftestexcept.c (fetestexcept): Call libc_fetestexcept_vfp. * sysdeps/arm/fenv_private.h: Move libc_*_vfp functions outside of __SOFTFP__ ifdef so that they can be built for softfp.
* Fix build warning in pthread_rwlock_*Siddhesh Poyarekar2014-06-241-1/+1
| | | | | | | The first argument of elision_adapt and that of ELISION_*LOCK have different signs since __elision_rwcount is signed char * and the argument of elision_adapt is uint8_t *. Modified elision_adapt to accept signed char * instead of uint8_t *.
* Add missing #include in get-rounding-mode.hRoland McGrath2014-06-231-0/+1
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* Remove an unused variable in fstatvfs.Roland McGrath2014-06-231-1/+0
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* Fix cosh spurious underflows from expm1 (bug 16354), inaccurate results near ↵Joseph Myers2014-06-236-7/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 0 (bug 17061). This patch fixes bug 16354, spurious underflows from cosh when a tiny argument is passed to expm1 and expm1 correctly underflows although the final result of cosh should be 1. As noted in that bug, some cases are latent because of expm1 implementations not raising underflow (bug 16353), but all the implementations are fixed similarly. They already contained checks for tiny arguments, but the checks were too late to avoid underflow from expm1 (although they would avoid underflow from subsequent squaring of the result of expm1); they are moved before the expm1 calls. The thresholds used for considering arguments tiny are not particularly consistent in how they relate to the precision of the floating-point format in question. They are, however, all sufficient to ensure that the round-to-nearest result of cosh is indeed 1 below the threshold (although sometimes they are smaller than necessary). But the previous logic did not return 1, but the previously computed 1 + expm1(abs(x)) value. And the thresholds in the ldbl-128 and ldbl-128ibm code (0x1p-71L - I suspect 0x3f8b was intended in the code instead of 0x3fb8 - and (roughly) 0x1p-55L) are not sufficient for that value to be 1. So by moving the test for tiny arguments, and consequently returning 1 directly now the expm1 value hasn't been computed by that point, this patch also fixes bug 17061, the (large number of ulps) inaccuracy for small arguments in those implementations. Tests for that bug are duly added. Tested x86_64 and x86 and ulps updated accordingly. Also tested for mips64 and powerpc32 to validate the ldbl-128 and ldbl-128ibm changes. [BZ #16354] [BZ #17061] * sysdeps/ieee754/dbl-64/e_cosh.c (__ieee754_cosh): Check for small arguments before calling __expm1. * sysdeps/ieee754/flt-32/e_coshf.c (__ieee754_coshf): Check for small arguments before calling __expm1f. * sysdeps/ieee754/ldbl-128/e_coshl.c (__ieee754_coshl): Check for small arguments before calling __expm1l. * sysdeps/ieee754/ldbl-128ibm/e_coshl.c (__ieee754_coshl): Likewise. * sysdeps/ieee754/ldbl-96/e_coshl.c (__ieee754_coshl): Likewise. * math/auto-libm-test-in: Add more cosh tests. Do not allow spurious underflow for some cosh tests. * math/auto-libm-test-out: Regenerated. * sysdeps/i386/fpu/libm-test-ulps: Update.
* Set errno for y1 overflow (bug 17050).Joseph Myers2014-06-234-4/+22
| | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes bug 17050, missing errno setting for y1 overflow (for small positive arguments). An appropriate check is added for overflow directly in the __ieee754_y1 implementation, similar to the check present for yn (doing it there rather than in the wrapper also avoids yn needing to repeat the check when called for order 1 or -1 and it uses __ieee754_y1). Tested x86_64 and x86; no ulps update needed. Also tested for mips64 to verify the ldbl-128 fix (the ldbl-128ibm code just #includes the ldbl-128 file). [BZ #17050] * sysdeps/ieee754/dbl-64/e_j1.c: Include <errno.h>. (__ieee754_y1): Set errno if return value overflows. * sysdeps/ieee754/flt-32/e_j1f.c: Include <errno.h>. (__ieee754_y1f): Set errno if return value overflows. * sysdeps/ieee754/ldbl-128/e_j1l.c: Include <errno.h>. (__ieee754_y1l): Set errno if return value overflows. * sysdeps/ieee754/ldbl-96/e_j1l.c: Include <errno.h>. (__ieee754_y1l): Set errno if return value overflows. * math/auto-libm-test-in: Add more tests of y0, y1 and yn. * math/auto-libm-test-out: Regenerated.
* Test cpow in all rounding modes.Joseph Myers2014-06-232-0/+96
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch enables testing of cpow in all rounding modes using ALL_RM_TEST. There were two reasons this was previously deferred: * MPC has complicated rounding-mode-dependent rules for the signs of exact zero real or imaginary parts in the result of mpc_pow. Annex G does not impose any such requirements and I don't think glibc should try to implement any particular logic here. This patch adds support for gen-auto-libm-tests passing the IGNORE_ZERO_INF_SIGN flag to libm-test.inc. * Error accumulations in some tests in non-default rounding modes exceed the maximum error permitted in libm-test.inc. This patch marks the problem tests with xfail-rounding. (It might be possible to reduce the accumulations a bit by using round-to-nearest when cpow calls clog, but I don't think there's much point; the implementation approach for cpow is fundamentally deficient, as discussed in the existing bug for cpow inaccuracy which can reasonably be considered to cover these less-inaccurate cases as well. It's possible that the test "cpow 2 0 10 0" will also need xfail-rounding on some platforms.) Tested x86_64 and x86 and ulps updated accordingly. * math/gen-auto-libm-tests.c: Document use of ignore-zero-inf-sign. (input_flag_type): Add value flag_ignore_zero_inf_sign. (input_flags): Add ignore-zero-inf-sign. (output_for_one_input_case): Handle flag_ignore_zero_inf_sign. * math/gen-libm-test.pl (generate_testfile): Handle ignore-zero-inf-sign. * math/auto-libm-test-in: Mark some cpow tests with ignore-zero-inf-sign and some with xfail-rounding. * math/auto-libm-test-out: Regenerated. * math/libm-test.inc (cpow_test): Use ALL_RM_TEST. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
* Fix pow overflow in non-default rounding modes (bug 16315).Joseph Myers2014-06-239-155/+172
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes bug 16315, bad pow handling of overflow/underflow in non-default rounding modes. Tests of pow are duly converted to ALL_RM_TEST to run all tests in all rounding modes. There are two main issues here. First, various implementations compute a negative result by negating a positive result, but this yields inappropriate overflow / underflow values for directed rounding, so either overflow / underflow results need recomputing in the correct sign, or the relevant overflowing / underflowing operation needs to be made to have a result of the correct sign. Second, the dbl-64 implementation sets FE_TONEAREST internally; in the overflow / underflow case, the result needs recomputing in the original rounding mode. Tested x86_64 and x86 and ulps updated accordingly. [BZ #16315] * sysdeps/i386/fpu/e_pow.S (__ieee754_pow): Ensure possibly overflowing or underflowing operations take place with sign of result. * sysdeps/i386/fpu/e_powf.S (__ieee754_powf): Likewise. * sysdeps/i386/fpu/e_powl.S (__ieee754_powl): Likewise. * sysdeps/ieee754/dbl-64/e_pow.c: Include <math.h>. (__ieee754_pow): Recompute overflowing and underflowing results in original rounding mode. * sysdeps/x86/fpu/powl_helper.c: Include <stdbool.h>. (__powl_helper): Allow negative argument X and scale negated value as needed. Avoid passing value outside [-1, 1] to f2xm1. * sysdeps/x86_64/fpu/e_powl.S (__ieee754_powl): Ensure possibly overflowing or underflowing operations take place with sign of result. * sysdeps/x86_64/fpu/multiarch/e_pow.c [HAVE_FMA4_SUPPORT]: Include <math.h>. * math/auto-libm-test-in: Add more tests of pow. * math/auto-libm-test-out: Regenerated. * math/libm-test.inc (pow_test): Use ALL_RM_TEST. (pow_tonearest_test_data): Remove. (pow_test_tonearest): Likewise. (pow_towardzero_test_data): Likewise. (pow_test_towardzero): Likewise. (pow_downward_test_data): Likewise. (pow_test_downward): Likewise. (pow_upward_test_data): Likewise. (pow_test_upward): Likewise. (main): Don't call removed functions. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
* powerpc: Consolidate nptl/ subdirectories under linux/....Roland McGrath2014-06-2358-736/+0
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* Add generic HAVE_RM_CTX implementationWilco Dijkstra2014-06-231-19/+96
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds a generic implementation of HAVE_RM_CTX using standard fenv calls. As a result math functions using SET_RESTORE_ROUND* macros do not suffer from a large slowdown on targets which do not implement optimized libc_fe*_ctx inline functions. Most of the libc_fe* inline functions are now unused and could be removed in the future (there are a few math functions left which use a mixture of standard fenv calls and libc_fe* inline functions - they could be updated to use SET_RESTORE_ROUND or improved to avoid expensive fenv manipulations across just a few FP instructions). libc_feholdsetround*_noex_ctx is added to enable better optimization of SET_RESTORE_ROUND_NOEX* implementations. Performance measurements on ARM and x86 of sin() show significant gains over the current default, fairly close to a highly optimized fenv_private: ARM x86 no fenv_private : 100% 100% generic HAVE_RM_CTX : 250% 350% fenv_private (CTX) : 250% 450% 2014-06-23 Will Newton <will.newton@linaro.org> Wilco <wdijkstr@arm.com> * sysdeps/generic/math_private.h: Add generic HAVE_RM_CTX implementation. Include get-rounding-mode.h. [!HAVE_RM_CTX]: Define HAVE_RM_CTX to zero. [!libc_feholdsetround_noex_ctx]: Define libc_feholdsetround_noex_ctx. [!libc_feholdsetround_noexf_ctx]: Define libc_feholdsetround_noexf_ctx. [!libc_feholdsetround_noexl_ctx]: Define libc_feholdsetround_noexl_ctx. (libc_feholdsetround_ctx): New function. (libc_feresetround_ctx): New function. (libc_feholdsetround_noex_ctx): New function. (libc_feresetround_noex_ctx): New function.
* MIPS: Move NPTL public headers to sysdeps/mips/nptl/.Roland McGrath2014-06-233-0/+0
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* m68k: Consolidate nptl/ subdirectories under linux/...Roland McGrath2014-06-2333-0/+0
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* SH: Consolidate nptl/ subdirectories under linux/.....Roland McGrath2014-06-2314-0/+0
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* Update headers for Linux 3.15.Joseph Myers2014-06-232-0/+9
| | | | | | | | | | | | | | | | | | This patch updates glibc headers for changes / new definitions in Linux 3.15. In the course of my review I noticed that IPV6_PMTUDISC_INTERFACE was absent from glibc despite the inclusion of IP_PMTUDISC_INTERFACE; I added it along with IP_PMTUDISC_OMIT and IPV6_PMTUDISC_OMIT. I did not add FALLOC_FL_NO_HIDE_STALE given the kernel header comment that it is reserved. Tested x86_64. * sysdeps/unix/sysv/linux/bits/fcntl-linux.h [__USE_GNU] (FALLOC_FL_COLLAPSE_RANGE): New macro. [__USE_GNU] (FALLOC_FL_ZERO_RANGE): Likewise. * sysdeps/unix/sysv/linux/bits/in.h (IP_PMTUDISC_OMIT): Likewise. (IPV6_PMTUDISC_INTERFACE): Likewise. (IPV6_PMTUDISC_OMIT): Likewise.
* PowerPC: sync hwcap.h capabilitiesAdhemerval Zanella2014-06-231-0/+2
| | | | | | | Linux commit dd58a092c4202f2bd490adab7285b3ff77f8e467 added the PPC_FEATURE2_VEC_CRYPTO auvx capability to indicate whether to hardware supports vector crypto hardware instructions. This patch adds its definition to powerpc hwcap bits.
* Clean up stack-coloring macros.Roland McGrath2014-06-204-38/+29
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* Move linux bits/ files out of nptl/.Roland McGrath2014-06-202-18/+138
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* Remove ARM __ASSUME_SIGFRAME_V2.Joseph Myers2014-06-214-59/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes ARM __ASSUME_SIGFRAME_V2 now that the 2.6.18-and-later signal frame layout can be assumed, renaming the affected functions accordingly now only one version of them is needed in glibc. (sigrestorer.S did not in fact include <kernel-features.h> and it appears that, unlike other such cases, it didn't get the header indirectly, so the v1 functions would have been compiled in even when sigaction.c didn't reference them.) (alpha and hppa also have architecture-specific __ASSUME_* macros that should now be removed: __ASSUME_FDATASYNC and __ASSUME_LWS_CAS respectively. I don't have any plans to do anything on that myself.) Tested on ARM. * sysdeps/unix/sysv/linux/arm/kernel-features.h (__ASSUME_SIGFRAME_V2): Remove macro. * sysdeps/unix/sysv/linux/arm/sigrestorer.S: Update comment. [!__ASSUME_SIGFRAME_V2]: Remove conditional code. (__default_sa_restorer_v2): Rename to __default_sa_restorer. (__default_rt_sa_restorer_v2): Rename to __default_rt_sa_restorer. * sysdeps/unix/sysv/linux/arm/sigaction.c (__default_sa_restorer): Declare as function. Remove conditional macro definitions. (__default_rt_sa_restorer): Likewise. (__default_sa_restorer_v1): Remove declaration. (__default_sa_restorer_v2): Likewise. (__default_rt_sa_restorer_v1): Likewise. (__default_rt_sa_restorer_v2): Likewise. * sysdeps/unix/sysv/linux/arm/Versions (GLIBC_PRIVATE): Remove __default_sa_restorer_v1, __default_rt_sa_restorer_v1, __default_sa_restorer_v2 and __default_rt_sa_restorer_v2.
* Missing new file from last commit.Roland McGrath2014-06-201-0/+3
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* Move remaining SPARC code out of nptl/.Roland McGrath2014-06-2035-0/+2007
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* Include <kernel-features.h> explicitly where required.Joseph Myers2014-06-204-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | This patch makes files using __ASSUME_* macros include <kernel-features.h> explicitly, rather than relying on some other header (such as tls.h, lowlevellock.h or pthreadP.h) to include it implicitly. (I omitted cases where I've already posted or am testing the patch that stops the file from needing __ASSUME_* at all.) This accords with the general principle of making source files include the headers for anything they use, and also helps make it safe to remove <kernel-features.h> includes from any file that doesn't use __ASSUME_* (some of those may be stray includes left behind after increasing the minimum kernel version, others may never have been needed or may have become obsolete after some other change). Tested x86_64 that the disassembly of installed shared libraries is unchanged by this patch. * nptl/pthread_cond_wait.c: Include <kernel-features.h>. * nptl/pthread_rwlock_timedrdlock.c: Likewise. * nptl/pthread_rwlock_timedwrlock.c: Likewise. * nptl/sysdeps/unix/sysv/linux/lowlevelrobustlock.c: Likewise. * nscd/nscd.c: Likewise. * sysdeps/i386/nptl/tcb-offsets.sym: Likewise. * sysdeps/powerpc/nptl/tcb-offsets.sym: Likewise. * sysdeps/sh/nptl/tcb-offsets.sym: Likewise. * sysdeps/x86_64/nptl/tcb-offsets.sym: Likewise.
* Remove __ASSUME_SOCK_CLOEXEC / SOCK_CLOEXEC conditionals in Linux-specific code.Joseph Myers2014-06-201-37/+2
| | | | | | | | | | | | | | | | | | | | | | This patch removes conditionals on __ASSUME_SOCK_CLOEXEC, and on SOCK_CLOEXEC being defined, in Linux-specific code, now that all supported Linux kernel versions can be assumed to have this functionality. (The macro is also used in OS-independent code and is not defined for Hurd.) Tested x86_64 that the disassembly of installed shared libraries is unchanged by this patch. * nptl/sysdeps/unix/sysv/linux/mq_notify.c: Do not include <kernel-features.h>. (init_mq_netlink): Remove conditional have_sock_cloexec definitions. Remove code conditional on have_sock_cloexec < 0. (init_mq_netlink) [!SOCK_CLOEXEC]: Remove conditional code. (init_mq_netlink) [!__ASSUME_SOCK_CLOEXEC]: Likewise. * sysdeps/unix/sysv/linux/opensock.c: Do not include <kernel-features.h>. (__opensock) [SOCK_CLOEXEC]: Make code unconditional. (__opensock) [!__ASSUME_SOCK_CLOEXEC]: Remove conditional code.
* Add ifunc tests for x86_64 memset_chk and memsetH.J. Lu2014-06-202-1/+12
| | | | | | | | | | | | This patch adds ifunc tests for x86_64 memset_chk and memset. It also defines HAS_AVX2 with AVX2_Usable since AVX2 may not be usable even if processor has AVX2. * sysdeps/x86_64/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Add tests for memset_chk and memset. * sysdeps/x86_64/multiarch/init-arch.h (HAS_AVX2): Defined with AVX2_Usable.
* Remove __ASSUME_F_GETOWN_EX.Joseph Myers2014-06-202-21/+1
| | | | | | | | | | | | | | | | This patch removes __ASSUME_F_GETOWN_EX now it can be assumed to be true unconditionally. Tested x86_64 that disassembly of installed shared libraries is unchanged by this patch. * sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_F_GETOWN_EX): Remove macro. * sysdeps/unix/sysv/linux/fcntl.c: Do not include <kernel-features.h>. (miss_F_GETOWN_EX): Remove variable or macro. (do_fcntl): Do not check miss_F_GETOWN_EX. (do_fcntl) [!__ASSUME_F_GETOWN_EX]: Remove conditional code.
* Remove __ASSUME_AT_RANDOM.Joseph Myers2014-06-202-44/+7
| | | | | | | | | | | | | | This patch removes __ASSUME_AT_RANDOM now it can be assumed to be true unconditionally. Tested x86_64 that the disassembly of installed shared libraries is unchanged by this patch. * sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_AT_RANDOM): Remove macro. * sysdeps/unix/sysv/linux/dl-osinfo.h (_dl_setup_stack_chk_guard) [!__ASSUME_AT_RANDOM]: Remove conditional code. (_dl_setup_pointer_guard) [!__ASSUME_AT_RANDOM]: Likewise.
* Remove __ASSUME_ADJ_OFFSET_SS_READ.Joseph Myers2014-06-202-23/+2
| | | | | | | | | | | | | | | | This patch removes the __ASSUME_ADJ_OFFSET_SS_READ macro (and conditionals on whether ADJ_OFFSET_SS_READ is defined), now it can be unconditionally assumed to be true and ADJ_OFFSET_SS_READ can be assumed to be defined. Tested x86_64 that the disassembly of installed shared libraries is unchanged by this patch. * sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_ADJ_OFFSET_SS_READ): Remove macro. * sysdeps/unix/sysv/linux/adjtime.c (ADJTIME) [ADJ_OFFSET_SS_READ]: Make code unconditional. (ADJTIME) [!ADJ_OFFSET_SS_READ]: Remove conditional code.
* [BZ #17075] ARM: Fix immediate calculation of R_ARM_TLS_DESCMaciej W. Rozycki2014-06-2010-1/+149
| | | | | | This fixes the calculation of R_ARM_TLS_DESC relocations for lazy global symbol references, i.e. created with `-z lazy' in effect with the static linker, where immediate resolution is requested with LD_BIND_NOW.
* Remove __ASSUME_ATFCTS conditionals in sysdeps/unix/sysv/linux/.Joseph Myers2014-06-2028-1572/+50
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch cleans up for __ASSUME_ATFCTS now always being true for the supported Linux kernel versions by removing conditional code in sysdeps/unix/sysv/linux. Several fchownat.c files that were only present because of differences in the fallback syscalls used (depending on the architecture-specific names of chown-related syscalls for 32-bit uids) are removed. Files that looks like they could be replaced by syscalls.list entries have the standard "Consider moving to syscalls.list." comment (see bug 14138) added. Conditionals on the relevant __NR_* syscall numbers being defined are also removed, since my analysis indicated that the relevant syscalls are always defined for all relevant kernel versions using any affected file. Much of the removed fallback code had unbounded stack allocations, so this reduces the number of cases to consider for anyone reviewing uses of alloca and VLAs in glibc. There remain tests of __ASSUME_ATFCTS in io/openat.c (to determine whether to define __have_atfcts) and sysdeps/posix/getcwd.c (which also uses __have_atfcts); thus, the definition of __ASSUME_ATFCTS remains in kernel-features.h. The logical condition relevant there is whether openat64_not_cancel_3 is known to work. Hurd doesn't use this version of getcwd at all, so the conditionals in getcwd.c are always true in glibc. However, this code is also used in gnulib. So the best way to deal with the conditionals there may be for gnulib people to deal with merging all relevant changes in both directions between the glibc and gnulib versions of this file, at the end of which the openat conditionals should be in whatever form is best for gnulib, and hardcoded in the _LIBC case to having openat supported. Tested by comparing before-and-after disassembly of installed (stripped) shared libraries, on x86_64 and x86. On x86 the patch made no change to the disassembly; on x86_64, the only changes were in readlinkat, where formerly the return value from the readlinkat syscall was stored in an int variable before being converted to ssize_t for the return, and now the return value is returned directly without truncation to int. I think it's clearly correct not to truncate the return value (although I also think the truncation would not have been a user-visible bug because the kernel would never have returned a value it could have affected). * include/fcntl.h (__atfct_seterrno): Remove prototype. (__atfct_seterrno_2): Likewise. * sysdeps/unix/sysv/linux/alpha/dl-fxstatat64.c: Do not include <kernel-features.h>. (__ASSUME_ATFCTS): Do not undefine and redefine. * sysdeps/unix/sysv/linux/alpha/fxstatat.c [__ASSUME_ATFCTS] (__have_atfcts): Remove conditional definition. (__fxstatat([__NR_fstatat64]: Make code unconditional. (__fxstatat) [!__ASSUME_ATFCTS]: Remove conditional code and code unreachable if [__ASSUME_ATFCTS]. * sysdeps/unix/sysv/linux/dl-fxstatat64.c (__ASSUME_ATFCTS): Do not undefine and redefine. * sysdeps/unix/sysv/linux/faccessat.c: Do not include <kernel-features.h>. (faccessat) [__NR_faccessat]: Make code unconditional. (faccessat) [!__ASSUME_ATFCTS]: Remove conditional code. * sysdeps/unix/sysv/linux/fchmodat.c: Do not include <kernel-features.h>. (fchmodat) [__NR_fchmodat]: Make code unconditional. (fchmodat) [!__ASSUME_ATFCTS]: Remove conditional code. * sysdeps/unix/sysv/linux/fchownat.c: Do not include <kernel-features.h>. (fchownat) [__NR_fchownat]: Make code unconditional. (fchownat) [!__ASSUME_ATFCTS]: Remove conditional code. * sysdeps/unix/sysv/linux/futimesat.c: Do not include <kernel-features.h>. (futimesat) [__NR_futimesat]: Make code unconditional. (futimesat) [!__ASSUME_ATFCTS]: Remove conditional code. * sysdeps/unix/sysv/linux/fxstatat.c: Do not include <kernel-features.h>. (__fxstatat) [__NR_newfstatat]: Make code unconditional. (__fxstatat) [!__ASSUME_ATFCTS]: Remove conditional code. * sysdeps/unix/sysv/linux/fxstatat64.c: Do not include <kernel-features.h>. (__fxstatat64) [__NR_fstatat64]: Make code unconditional. (__fxstatat64) [!__ASSUME_ATFCTS]: Remove conditional code. * sysdeps/unix/sysv/linux/i386/fchownat.c: Remove file. * sysdeps/unix/sysv/linux/i386/fxstatat.c: Do not include <kernel-features.h>. (__fxstatat) [__NR_fstatat64]: Make code unconditional. (__fxstatat) [!__ASSUME_ATFCTS]: Remove conditional code. * sysdeps/unix/sysv/linux/linkat.c: Do not include <kernel-features.h>. (linkat) [__NR_linkat]: Make code unconditional. (linkat) [!__ASSUME_ATFCTS]: Remove conditional code. * sysdeps/unix/sysv/linux/m68k/fchownat.c: Remove file. * sysdeps/unix/sysv/linux/mips/mips64/fxstatat64.c: Do not include <kernel-features.h>. (__fxstatat64) [__NR_newfstatat]: Make code unconditional. (__fxstatat64) [!__ASSUME_ATFCTS]: Remove conditional code. * sysdeps/unix/sysv/linux/mkdirat.c: Do not include <kernel-features.h>. (mkdirat) [__NR_mkdirat]: Make code unconditional. (mkdirat) [!__ASSUME_ATFCTS]: Remove conditional code. * sysdeps/unix/sysv/linux/openat.c: Do not include <kernel-features.h>. [!__ASSUME_ATFCTS] (__atfct_seterrno): Remove function. [!__ASSUME_ATFCTS] (__have_atfcts): Remove variable. (OPENAT_NOT_CANCEL) [__NR_openat]: Make code unconditional. (OPENAT_NOT_CANCEL) [!__ASSUME_ATFCTS]: Remove conditional code. * sysdeps/unix/sysv/linux/powerpc/fchownat.c: Remove file. * sysdeps/unix/sysv/linux/readlinkat.c: Do not include <kernel-features.h>. (readlinkat) [__NR_readlinkat]: Make code unconditional. (readlinkat) [!__ASSUME_ATFCTS]: Remove conditional code. Return result of INLINE_SYSCALL directly, not via int variable. * sysdeps/unix/sysv/linux/renameat.c: Do not include <kernel-features.h>. [!__ASSUME_ATFCTS] (__atfct_seterrno_2): Remove function. (renameat) [__NR_renameat]: Make code unconditional. (renameat) [!__ASSUME_ATFCTS]: Remove conditional code. * sysdeps/unix/sysv/linux/s390/s390-32/fchownat.c: Remove file. * sysdeps/unix/sysv/linux/sh/fchownat.c: Remove file. * sysdeps/unix/sysv/linux/sparc/sparc32/fchownat.c: Remove file. * sysdeps/unix/sysv/linux/sparc/sparc64/dl-fxstatat64.c (__ASSUME_ATFCTS): Do not undefine and redefine. * sysdeps/unix/sysv/linux/symlinkat.c: Do not include <kernel-features.h>. (symlinkat) [__NR_symlinkat]: Make code unconditional. (symlinkat) [!__ASSUME_ATFCTS]: Remove conditional code. * sysdeps/unix/sysv/linux/unlinkat.c: Do not include <kernel-features.h>. (unlinkat) [__NR_unlinkat]: Make code unconditional. (unlinkat) [!__ASSUME_ATFCTS]: Remove conditional code. * sysdeps/unix/sysv/linux/wordsize-64/dl-fxstatat64.c (__ASSUME_ATFCTS): Do not undefine and redefine. * sysdeps/unix/sysv/linux/wordsize-64/fxstatat.c: Do not include <kernel-features.h>. (__fxstatat) [__NR_newfstatat]: Make code unconditional. (__fxstatat) [!__ASSUME_ATFCTS]: Remove conditional code. * sysdeps/unix/sysv/linux/xmknodat.c: Do not include <kernel-features.h>. (__xmknodat) [__NR_mknodat]: Make code unconditional. (__xmknodat) [!__ASSUME_ATFCTS]: Remove conditional code.
* Remove sysdeps/x86_64/multiarch/rtld-strlen.SH.J. Lu2014-06-201-1/+0
| | | | | | | Since there is no sysdeps/x86_64/multiarch/strlen.S, sysdeps/x86_64/rtld-strlen.S will be used. * sysdeps/x86_64/multiarch/rtld-strlen.S: Removed.
* [BZ #6803] Set errno for scalbln, scalbnStefan Liebler2014-06-2015-19/+70
| | | | | | | | | | | Errno is not set and the testcases will fail. Now the scalbln-aliases are removed in i386/m68 and the wrappers are used when calling the scalbln-functions. On ia64 only scalblnf has its own implementation. For scalbln and scalblnl the ieee754/dbl-64 and ieee754/ldbl-96 are used, thus the wrappers are needed, too.
* Use 3 bytes for __pad1 in pthread_rwlock_t for x32H.J. Lu2014-06-191-1/+6
| | | | | | | | | Since long is 4 bytes for x32, we should use 3 bytes for __pad1 when a long __pad1 is replaced by a byte __rwelision and __pad1. * sysdeps/x86/nptl/bits/pthreadtypes.h (pthread_rwlock_t): Use 3 bytes for __pad1 for x32. (__PTHREAD_RWLOCK_ELISION_EXTRA): Likewise.
* Add x86_64 memset optimized for AVX2Ling Ma2014-06-195-1/+275
| | | | | | | | | | | | | | | In this patch we take advantage of HSW memory bandwidth, manage to reduce miss branch prediction by avoiding using branch instructions and force destination to be aligned with avx & avx2 instruction. The CPU2006 403.gcc benchmark indicates this patch improves performance from 26% to 59%. * sysdeps/x86_64/multiarch/Makefile: Add memset-avx2. * sysdeps/x86_64/multiarch/memset-avx2.S: New file. * sysdeps/x86_64/multiarch/memset.S: Likewise. * sysdeps/x86_64/multiarch/memset_chk.S: Likewise. * sysdeps/x86_64/multiarch/rtld-memset.S: Likewise.
* [AArch64] Add optimized strchr.Richard Earnshaw2014-06-191-0/+138
| | | | | | | | Implementation of strchr for AArch64. Speedups taken from micro-bench show the improvements relative to the standard C code. The use of LD1 means we have identical code for both big- and little-endian systems.
* Fix __ieee754_logl (-LDBL_MAX) in FE_DOWNWARD mode (bug 17022).Joseph Myers2014-06-183-3/+12
| | | | | | | | | | | | | | | | | | | This patch fixes __ieee754_logl (-LDBL_MAX) on x86_64 and x86 not to subtract 1 from its argument and so cause spurious overflow in FE_DOWNWARD mode. (For any argument strictly less than -1, it doesn't matter whether or not 1 is subtracted before computing log1p, as long as the result doesn't overflow to -Inf.) Tested x86_64 and x86. (This particular case lacks test coverage, since the testsuite doesn't cover -lieee, but it will be covered by tests after the following patch to test pow in all rounding modes, which was the context in which this bug was found.) [BZ #17022] * sysdeps/i386/fpu/e_logl.S (__ieee754_logl): Do not subtract 1 from arguments -2 or below. * sysdeps/i386/i686/fpu/e_logl.S (__ieee754_logl): Likewise. * sysdeps/x86_64/fpu/e_logl.S (__ieee754_logl): Likewise.
* Use $(rtld-prefix) more consistently.Joseph Myers2014-06-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | The glibc makefiles have a standard variable, $(rtld-prefix), to run the dynamic linker with a default --library-path option; this is used as the basis of lots of other variables for running programs compiled with the newly built library. A few places however use $(elf-objpfx)ld.so or $(elf-objpfx)${rtld-installed-name} directly, with such a --library-path option. This patch makes such places use $(rtld-prefix) instead. I'm not aware of any significance in these cases to the choice of ld.so or ${rtld-installed-name} when running the dynamic linker, or to whether $(patsubst %,:%,$(sysdep-library-path)) is included in the library-path as it is in $(rtld-prefix) and just one of the places being changed. Tested x86_64. * elf/Makefile ($(objpfx)tst-unused-dep.out): Use $(rtld-prefix). * iconvdata/Makefile ($(inst_gconvdir)/gconv-modules) [$(cross-compiling) = no]: Likewise. * sysdeps/s390/s390-64/Makefile ($(inst_gconvdir)/gconv-modules) [$(cross-compiling) = no]: Likewise. localedata/ChangeLog: * Makefile (LOCALEDEF): Use $(rtld-prefix).
* PowerPC: Fix nearbyintl failure for few inputsRajalakshmi Srinivasaraghavan2014-06-171-0/+5
| | | | | | | | This patch fixes few failures in nearbyintl() where the fraction part is close to 0.5.i The new tests added report few extra failures in nearbyint_downward and nearbyint_towardzero which is a known issue. Fixes #17031.
* PowerPC: Move powerpc code out of nptl/ subdirectoryAdhemerval Zanella2014-06-176-0/+382
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* Add CFI to x86 ceil / floor / trunc (bug 16681).Joseph Myers2014-06-169-0/+18
| | | | | | | | | | | | | | | | | | | This patch adds CFI to the sysdeps/i386/fpu/ implementations of ceil, floor and trunc functions, for consistency with other x86 .S files in glibc which have CFI for stack adjustments. Tested x86. [BZ #16681] * sysdeps/i386/fpu/s_ceil.S (__ceil): Add CFI. * sysdeps/i386/fpu/s_ceilf.S (__ceilf): Likewise. * sysdeps/i386/fpu/s_ceill.S (__ceill): Likewise. * sysdeps/i386/fpu/s_floor.S (__floor): Likewise. * sysdeps/i386/fpu/s_floorf.S (__floorf): Likewise. * sysdeps/i386/fpu/s_floorl.S (__floorl): Likewise. * sysdeps/i386/fpu/s_trunc.S (__trunc): Likewise. * sysdeps/i386/fpu/s_truncf.S (__truncf): Likewise. * sysdeps/i386/fpu/s_truncl.S (__truncl): Likewise.
* m68k: update libm test ULPsAndreas Schwab2014-06-171-48/+882
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* Fix typo in preprocessor conditionalAndreas Schwab2014-06-161-1/+1
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