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* powerpc: Fix incorrect results for pow when using FMAAdhemerval Zanella2015-03-101-0/+1
| | | | | This patch adds no FMA generation for e_pow to avoid precision issues for powerpc. This fixes BZ#18104.
* Update powerpc-fpu ULPs.Adhemerval Zanella2015-03-091-50/+66
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* hurd: Make libc able to call pthread stubsSamuel Thibault2015-03-081-0/+6
| | | | | * sysdeps/mach/hurd/bits/libc-lock.h [_LIBC]: Include <bits/libc-lockP.h>
* Fix aio_error thread-safety.Samuel Thibault2015-03-062-8/+49
| | | | | | * sysdeps/pthread/aio_error.c: New file * sysdeps/pthread/aio_misc.c: Remove optimistic comment about synchronization.
* Replace ELF_RTYPE_CLASS_NOCOPY with ELF_RTYPE_CLASS_COPYH.J. Lu2015-03-0517-17/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ELF_RTYPE_CLASS_NOCOPY in comments is a typo. It should be ELF_RTYPE_CLASS_COPY. [BZ #18082] * sysdeps/alpha/dl-machine.h (elf_machine_type_class): Replace ELF_RTYPE_CLASS_NOCOPY with ELF_RTYPE_CLASS_COPY in comments. * sysdeps/arm/dl-machine.h (elf_machine_type_class): Likewise. * sysdeps/hppa/dl-machine.h (elf_machine_type_class): Likewise. * sysdeps/i386/dl-machine.h (elf_machine_type_class): Likewise. * sysdeps/ia64/dl-machine.h (elf_machine_type_class): Likewise. * sysdeps/m68k/dl-machine.h (elf_machine_type_class): Likewise. * sysdeps/microblaze/dl-machine.h (elf_machine_type_class): Likewise. * sysdeps/nios2/dl-machine.h (elf_machine_type_class): Likewise. * sysdeps/powerpc/powerpc32/dl-machine.h (elf_machine_type_class): Likewise. * sysdeps/powerpc/powerpc64/dl-machine.h (elf_machine_type_class): Likewise. * sysdeps/s390/s390-32/dl-machine.h (elf_machine_type_class): Likewise. * sysdeps/s390/s390-64/dl-machine.h (elf_machine_type_class): Likewise. * sysdeps/sh/dl-machine.h (elf_machine_type_class): Likewise. * sysdeps/sparc/sparc32/dl-machine.h (elf_machine_type_class): Likewise. * sysdeps/sparc/sparc64/dl-machine.h (elf_machine_type_class): Likewise. * sysdeps/tile/dl-machine.h (elf_machine_type_class): Likewise. * sysdeps/x86_64/dl-machine.h (elf_machine_type_class): Likewise.
* Define ETH_ALEN in generic <netinet/if_ether.h>.Roland McGrath2015-03-041-3/+3
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* powerpc: Fix inline feraiseexcept, feclearexcept macrosAdhemerval Zanella2015-03-031-20/+32
| | | | | | | This patch fixes the inline feraiseexcept and feclearexcept macros for powerpc by casting the input argument to integer before operation on it. It fixes BZ#17776.
* Deglobalize internal variables in timer_routines.c.Roland McGrath2015-03-021-3/+3
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* Correct __ASSUME_PRLIMIT64 for hppa/microblaze/sh (bug 17779).Joseph Myers2015-03-023-0/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | __ASSUME_PRLIMIT64 is defined in kernel-features.h for kernels 2.6.36 and later, but hppa, microblaze and sh did not add the prlimit64 syscall until 2.6.37. This patch adds corresponding undefines of __ASSUME_PRLIMIT64 to those architectures' kernel-features.h files. (This concludes the kernel-features.h fixes arising out of the review - limited to macros defined in the architecture-independent kernel-features.h file - I did in connection with the move to 2.6.32 minimum kernel version. For that subset of macros - I didn't check any purely architecture-specific macros - I think they are now defined for the correct kernel versions on each architecture after this patch.) [BZ #17779] * sysdeps/unix/sysv/linux/hppa/kernel-features.h [__LINUX_KERNEL_VERSION < 0x020625] (__ASSUME_PRLIMIT64): Undefine. * sysdeps/unix/sysv/linux/microblaze/kernel-features.h [__LINUX_KERNEL_VERSION < 0x020625] (__ASSUME_PRLIMIT64): Likewise. * sysdeps/unix/sysv/linux/sh/kernel-features.h [__LINUX_KERNEL_VERSION < 0x020625] (__ASSUME_PRLIMIT64): Likewise.
* Fix ldbl-96, ldbl-128ibm atanhl inaccuracy (bug 18046, bug 18047).Joseph Myers2015-02-274-3/+9
| | | | | | | | | | | | | | | | | | | | | | | | | The threshold in ldbl-96 atanhl for when to return the argument, 0x1p-28, is a bit too big, and that in ldbl-128ibm atanhl is much too big (the relevant condition being x^3/3 being < 0.5ulp of x), resulting in errors a bit above the limits of those considered acceptable in glibc in the ldbl-96 case, and in large errors in the ldbl-128ibm case. This patch changes those implementations to use more appropriate thresholds and adds tests around the thresholds for various formats. Tested for x86_64, x86 and powerpc. x86_64 and x86 ulps updated accordingly. [BZ #18046] [BZ #18047] * sysdeps/ieee754/ldbl-128ibm/e_atanhl.c (__ieee754_atanhl): Use 0x1p-56L as threshold for just returning the argument. * sysdeps/ieee754/ldbl-96/e_atanhl.c (__ieee754_atanhl): Use 0x1p-32L as threshold for just returning the argument. * math/auto-libm-test-in: Add more tests of atanh. * math/auto-libm-test-out: Regenerated. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulp: Likewise.
* hppa: fix __O_SYNC to match the kernelJohn David Anglin2015-02-271-1/+1
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* Add comment to CSTR macro in k_standard.c.Joseph Myers2015-02-271-0/+1
| | | | * sysdeps/ieee754/k_standard.c (CSTR): Add comment.
* Avoid -Wno-write-strings for k_standard.c.Joseph Myers2015-02-262-81/+54
| | | | | | | | | | | | | | | | | | | We want to avoid -Wno- options in makefiles as far as possible, by cleaning up the underlying issues if possible or failing that by using diagnostic pragmas. This patch eliminates the use of -Wno-write-strings for sysdeps/ieee754/k_standard.c by using casts in the source file to cast away const; those casts are encapsulated in a macro that also deals with the choice of strings for float / double / long double functions (for which the logic was previously replicated many times). Tested for x86_64; the only change to disassembly of installed stripped shared libraries was a line number in an assertion. * sysdeps/ieee754/k_standard.c (CSTR): New macro. (__kernel_standard): Use CSTR macro when setting exc.name. * sysdeps/ieee754/Makefile [$(subdir) = math] (CFLAGS-k_standard.c): Remove variable.
* Avoid uninitialized warnings in Bessel functions.Joseph Myers2015-02-266-12/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | math/Makefile currently has: # The fdlibm code generates a lot of these warnings but is otherwise clean. override CFLAGS += -Wno-uninitialized This is of course undesirable; warnings should be disabled as narrowly as possible. To remove this override, we need to fix files that generate such warnings, or put warning-disabling pragmas in them. This patch does so for Bessel function implementations, one of the cases that have the warnings if the override is removed. The warnings arise because functions set pointer variables p and q only for certain values of the function argument, then use them unconditionally. As the static functions in question only get called for arguments that satisfy the last condition in the if/else chain, the natural fix is to change the last "else if" to just "else", which this patch does. (The ldbl-128 / ldbl-128ibm implementation of these functions is substantially different and looks like it already does use "else" in the last case in the nearest corresponding code.) Tested for x86_64 and x86. * sysdeps/ieee754/dbl-64/e_j0.c (pzero): Change last case for setting p and q from "else if" to "else". (qzero): Likewise. * sysdeps/ieee754/dbl-64/e_j1.c (pone): Likewise. (qone): Likewise. * sysdeps/ieee754/flt-32/e_j0f.c (pzerof): Likewise. (qzerof): Likewise. * sysdeps/ieee754/flt-32/e_j1f.c (ponef): Likewise. (qonef): Likewise. * sysdeps/ieee754/ldbl-96/e_j0l.c (pzero): Likewise. (qzero): Likewise. * sysdeps/ieee754/ldbl-96/e_j1l.c (pone): Likewise. (qone): Likewise.
* Fix ldbl-128/ldbl-128ibm acosl inaccuracy (bug 18038, bug 18039).Joseph Myers2015-02-262-2/+2
| | | | | | | | | | | | | | | | | | | | | The ldbl-128 and ldbl-128ibm implementations of acosl have similar bugs, using a threshold of 0x1p-57L to determine when they just return pi/2. Since the result pi/2 - asinl (x) is roughly pi/2 - x for small x, the relevant cut-off is actually x being < 0.5ulp of 1. This patch fixes the implementations to use that cut-off and adds tests of small acos arguments. Tested for powerpc and mips64. Also tested for x86_64 and x86; no ulps updates needed. [BZ #18038] [BZ #18039] * sysdeps/ieee754/ldbl-128/e_acosl.c (__ieee754_acosl): Only return pi/2 for arguments below 0x1p-113L. * sysdeps/ieee754/ldbl-128ibm/e_acosl.c (__ieee754_acosl): Only return pi/2 for arguments below 0x1p-106L. * math/auto-libm-test-in: Add more tests of acos. * math/auto-libm-test-out: Regenerated.
* Fix asin missing underflows (bug 16351).Joseph Myers2015-02-268-3/+102
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Similar to various other bugs in this area, some asin implementations do not raise the underflow exception for subnormal arguments, when the result is tiny and inexact. This patch forces the exception in a similar way to previous fixes. Tested for x86_64, x86, powerpc and mips64. [BZ #16351] * sysdeps/i386/fpu/e_asin.S (dbl_min): New object. (MO): New macro. (__ieee754_asin): Force underflow exception for results with small absolute value. * sysdeps/i386/fpu/e_asinf.S (flt_min): New object. (MO): New macro. (__ieee754_asinf): Force underflow exception for results with small absolute value. * sysdeps/ieee754/dbl-64/e_asin.c: Include <float.h> and <math.h>. (__ieee754_asin): Force underflow exception for results with small absolute value. * sysdeps/ieee754/flt-32/e_asinf.c: Include <float.h>. (__ieee754_asinf): Force underflow exception for results with small absolute value. * sysdeps/ieee754/ldbl-128/e_asinl.c: Include <float.h>. (__ieee754_asinl): Force underflow exception for results with small absolute value. * sysdeps/ieee754/ldbl-128ibm/e_asinl.c: Include <float.h>. (__ieee754_asinl): Force underflow exception for results with small absolute value. * sysdeps/ieee754/ldbl-96/e_asinl.c: Include <float.h>. (__ieee754_asinl): Force underflow exception for results with small absolute value. * sysdeps/x86_64/fpu/multiarch/e_asin.c [HAVE_FMA4_SUPPORT]: Include <math.h>. * math/auto-libm-test-in: Do not mark underflow exceptions as possibly missing for bug 16351. * math/auto-libm-test-out: Regenerated.
* Fix ldbl-128ibm logbl near powers of 2 (bug 18030).Joseph Myers2015-02-261-3/+14
| | | | | | | | | | | | | | | | | The ldbl-128ibm implementation of logbl produces incorrect results when the high part of the argument is a power of 2 and the low part a nonzero number with the opposite sign (and so the returned exponent should be 1 less than that of the high part). For example, logbl (0x1.ffffffffffffffp1L) returns 2 but should return 1. (This is similar to (fixed) bug 16740 for frexpl, and (fixed) bug 18029 for ilogbl.) This patch adds checks for that case. Tested for powerpc. [BZ #18030] * sysdeps/ieee754/ldbl-128ibm/s_logbl.c (__logbl): Adjust exponent of power of 2 down when low part has opposite sign. * math/libm-test.inc (logb_test_data): Add more tests.
* Fix ldbl-128ibm ilogbl near powers of 2 (bug 18029).Joseph Myers2015-02-261-4/+19
| | | | | | | | | | | | | | | | | | The ldbl-128ibm implementation of ilogbl produces incorrect results when the high part of the argument is a power of 2 and the low part a nonzero number with the opposite sign (and so the returned exponent should be 1 less than that of the high part). For example, ilogbl (0x1.ffffffffffffffp1L) returns 2 but should return 1. (This is similar to (fixed) bug 16740 for frexpl, and bug 18030 for logbl.) This patch adds checks for that case. Tested for powerpc. [BZ #18029] * sysdeps/ieee754/ldbl-128ibm/e_ilogbl.c (__ieee754_ilogbl): Adjust exponent of power of 2 down when low part has opposite sign. * math/libm-test.inc (ilogb_test_data): Add more tests.
* powerpc: Fix memmove static buildAdhemerval Zanella2015-02-251-1/+3
| | | | | | | This patch fixes the missing "__memcpy_ppc" symbol for memmove-ppc64 object in static builds. Since memcpy ifunc is not enabled in static mode, the specialized symbols are not provided. The patch changed the it to just "__memcpy" instead.
* Fix ldbl-128ibm asinhl inaccuracy (bug 18020).Joseph Myers2015-02-253-21/+22
| | | | | | | | | | | | | | | | | | | The ldbl-128ibm implementation of asinhl uses cut-offs of 0x1p28 and 0x1p-29 to determine when to use simpler formulas that avoid possible overflow / underflow. Both those cut-offs are inappropriate for this format, resulting in large errors. This patch changes the code to use more appropriate cut-offs of 0x1p56 and 0x1p-56, adding tests around the cut-offs for various floating-point formats. Tested for powerpc. Also tested for x86_64 and x86 and updated ulps. [BZ #18020] * sysdeps/ieee754/ldbl-128ibm/s_asinhl.c (__asinhl): Use 2**56 and 2**-56 not 2**28 and 2**-29 as thresholds for simpler formulas. * math/auto-libm-test-in: Add more tests of asinh. * math/auto-libm-test-out: Regenerated. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
* in.h: Coordinate in6_pktinfo and ip6_mtuinfo for kernel and glibc [BZ #15850]Cong Wang2015-02-251-4/+4
| | | | | | | | Similarly to what we did for in6_addr, we need a macro to guard in6_pktinfo and ip6_mtuinfo too. Cc: Carlos O'Donell <carlos@redhat.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
* Update timex.h for ADJ_SETOFFSET.Miroslav Lichvar2015-02-241-2/+3
| | | | | ADJ_SETOFFSET is a new adjtimex() mode that can be used to precisely step the clock. It was introduced in kernel 2.6.39.
* Fix ldbl-128ibm acoshl inaccuracy (bug 18019).Joseph Myers2015-02-253-4/+21
| | | | | | | | | | | | | | | | | | The ldbl-128ibm implementation of acoshl uses a cut-off of 0x1p28 to determine when to use log(x) + log(2) as a formula. That cut-off is too small for this format, resulting in large errors. This patch changes it to a more appropriate cut-off of 0x1p56, adding tests around the cut-offs for various floating-point formats. Tested for powerpc. Also tested for x86_64 and x86 and updated ulps. [BZ #18019] * sysdeps/ieee754/ldbl-128ibm/e_acoshl.c (__ieee754_acoshl): Use 2**56 not 2**28 as threshold for log (2x) formula. * math/auto-libm-test-in: Add more tests of acosh. * math/auto-libm-test-out: Regenerated. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
* Fix x86/x86_64 scalb (qNaN, -Inf) (bug 16783).Joseph Myers2015-02-244-4/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Various x86 / x86_64 versions of scalb / scalbf / scalbl produce spurious "invalid" exceptions for (qNaN, -Inf) arguments, because this is wrongly handled like (+/-Inf, -Inf) which *should* raise such an exception. (In fact the NaN case of the code determining whether to quietly return a zero or a NaN for second argument -Inf was accidentally dead since the code had been made to return a NaN with exception.) This patch fixes the code to do the proper test for an infinity as distinct from a NaN. (Since the existing code does nothing to distinguish qNaNs and sNaNs here, this patch doesn't either. If in future we systematically implement proper sNaN semantics following TS 18661-1:2014, there will be lots of bugs to address - Thomas found lots of issues with his patch <https://sourceware.org/ml/libc-ports/2013-04/msg00008.html> to add SNaN tests (which never went in and would now require significant reworking).) Tested for x86_64 and x86. Committed. [BZ #16783] * sysdeps/i386/fpu/e_scalb.S (__ieee754_scalb): Do not handle arguments (NaN, -Inf) the same as (+/-Inf, -Inf). * sysdeps/i386/fpu/e_scalbf.S (__ieee754_scalbf): Likewise. * sysdeps/i386/fpu/e_scalbl.S (__ieee754_scalbl): Likewise. * sysdeps/x86_64/fpu/e_scalbl.S (__ieee754_scalbl): Likewise. * math/libm-test.inc (scalb_test_data): Add more tests.
* linux: open and openat ignore 'mode' with O_TMPFILE in flagsEric Rannaud2015-02-248-17/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Both open and openat load their last argument 'mode' lazily, using va_arg() only if O_CREAT is found in oflag. This is wrong, mode is also necessary if O_TMPFILE is in oflag. By chance on x86_64, the problem wasn't evident when using O_TMPFILE with open, as the 3rd argument of open, even when not loaded with va_arg, is left untouched in RDX, where the syscall expects it. However, openat was not so lucky, and O_TMPFILE couldn't be used: mode is the 4th argument, in RCX, but the syscall expects its 4th argument in a different register than the glibc wrapper, in R10. Introduce a macro __OPEN_NEEDS_MODE (oflag) to test if either O_CREAT or O_TMPFILE is set in oflag. Tested on Linux x86_64. [BZ #17523] * io/fcntl.h (__OPEN_NEEDS_MODE): New macro. * io/bits/fcntl2.h (open): Use it. (openat): Likewise. * io/open.c (__libc_open): Likewise. * io/open64.c (__libc_open64): Likewise. * io/open64_2.c (__open64_2): Likewise. * io/open_2.c (__open_2): Likewise. * io/openat.c (__openat): Likewise. * io/openat64.c (__openat64): Likewise. * io/openat64_2.c (__openat64_2): Likewise. * io/openat_2.c (__openat_2): Likewise. * sysdeps/mach/hurd/open.c (__libc_open): Likewise. * sysdeps/mach/hurd/openat.c (__openat): Likewise. * sysdeps/posix/open64.c (__libc_open64): Likewise. * sysdeps/unix/sysv/linux/dl-openat64.c (openat64): Likewise. * sysdeps/unix/sysv/linux/generic/open.c (__libc_open): Likewise. (__open_nocancel): Likewise. * sysdeps/unix/sysv/linux/generic/open64.c (__libc_open64): Likewise. * sysdeps/unix/sysv/linux/open64.c (__libc_open64): Likewise. * sysdeps/unix/sysv/linux/openat.c (__OPENAT): Likewise.
* hppa: fix build failure with RTLD_PRIVATE_ERRNOMike Frysinger2015-02-241-0/+3
| | | | | Pull in dl-sysdep.h like every other linux sysdep.h header does when it wants to use RTLD_PRIVATE_ERRNO.
* s390: Use generic lowlevellock-futex.hStefan Liebler2015-02-202-325/+51
| | | | | | | | | * sysdeps/unix/sysv/linux/s390/lowlevellock.h: Include <sysdeps/nptl/lowlevellock.h> and remove macros and functions that are now defined there. (SYS_futex): Remove. (lll_compare_and_swap): Remove. * sysdeps/s390/bits/atomic.h (atomic_exchange_acq): Define.
* Fix atan / atan2 missing underflows (bug 15319).Joseph Myers2015-02-1812-25/+192
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes bug 15319, missing underflows from atan / atan2 when the result of atan is very close to its small argument (or that of atan2 is very close to the ratio of its arguments, which may be an exact division). The usual approach of doing an underflowing computation if the computed result is subnormal is followed. For 32-bit x86, there are extra complications: the inline __ieee754_atan2 in bits/mathinline.h needs to be disabled for float and double because other libm functions using it generally rely on getting proper underflow exceptions from it, while the out-of-line functions have to remove excess range and precision from the underflowing result so as to return an exact 0 in the case where errno should be set for underflow to 0. (The failures I saw without that are similar to those Carlos reported for other functions, where I haven't seen a response to <https://sourceware.org/ml/libc-alpha/2015-01/msg00485.html> confirming if my diagnosis is correct. Arguably all libm functions with float and double returns should remove excess range and precision, but that's a separate matter.) The x86_64 long double case reported in a comment in bug 15319 is not a bug (it's an argument of LDBL_MIN, and x86_64 is an after-rounding architecture so the correct IEEE result is not to raise underflow in the given rounding mode, in addition to treating the result as an exact LDBL_MIN being within the newly clarified documentation of accuracy goals). I'm presuming that the fpatan instruction can be trusted to raise appropriate exceptions when the (long double) result underflows (after rounding) and so no changes are needed for x86 / x86_64 long double functions here; empirically this is the case for the cases covered in the testsuite, on my system. Tested for x86_64, x86, powerpc and mips64. Only 32-bit x86 needs ulps updates (for the changes to inlines meaning some functions no longer get excess precision from their __ieee754_atan2* calls). [BZ #15319] * sysdeps/i386/fpu/e_atan2.S (dbl_min): New object. (MO): New macro. (__ieee754_atan2): For results with small absolute value, force underflow exception and remove excess range and precision from return value. * sysdeps/i386/fpu/e_atan2f.S (flt_min): New object. (MO): New macro. (__ieee754_atan2f): For results with small absolute value, force underflow exception and remove excess range and precision from return value. * sysdeps/i386/fpu/s_atan.S (dbl_min): New object. (MO): New macro. (__atan): For results with small absolute value, force underflow exception and remove excess range and precision from return value. * sysdeps/i386/fpu/s_atanf.S (flt_min): New object. (MO): New macro. (__atanf): For results with small absolute value, force underflow exception and remove excess range and precision from return value. * sysdeps/ieee754/dbl-64/e_atan2.c: Include <float.h> and <math.h>. (__ieee754_atan2): Force underflow exception for results with small absolute value. * sysdeps/ieee754/dbl-64/s_atan.c: Include <float.h> and <math_private.h>. (atan): Force underflow exception for results with small absolute value. * sysdeps/ieee754/flt-32/s_atanf.c: Include <float.h>. (__atanf): Force underflow exception for results with small absolute value. * sysdeps/ieee754/ldbl-128/s_atanl.c: Include <float.h> and <math.h>. (__atanl): Force underflow exception for results with small absolute value. * sysdeps/ieee754/ldbl-128ibm/s_atanl.c: Include <float.h>. (__atanl): Force underflow exception for results with small absolute value. * sysdeps/x86/fpu/bits/mathinline.h [!__SSE2_MATH__ && !__x86_64__ && __LIBC_INTERNAL_MATH_INLINES] (__ieee754_atan2): Only define inline for long double. * sysdeps/x86_64/fpu/multiarch/e_atan2.c [HAVE_FMA4_SUPPORT || HAVE_AVX_SUPPORT]: Include <math.h>. * math/auto-libm-test-in: Do not mark underflow exceptions as possibly missing for bug 15319. Add more tests of atan2. * math/auto-libm-test-out: Regenerated. * math/libm-test.inc (casin_test_data): Do not mark underflow exceptions as possibly missing for bug 15319. (casinh_test_data): Likewise. * sysdeps/i386/fpu/libm-test-ulps: Update.
* 2015-02-18 Steve Ellcey <sellcey@imgtec.com>Steve Ellcey2015-02-182-17/+3
| | | | | * sysdeps/unix/sysv/linux/mips/bits/endian.h: Remove. * sysdeps/mips/bits/endian.h: Fix comments.
* Fix posix_spawn getrlimit64 namespace (bug 17991).Joseph Myers2015-02-186-10/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | posix_spawn (a standard POSIX function) brings in a use of getrlimit64 (not a standard POSIX function). This patch fixes this by using __getrlimit64 and making getrlimit64 a weak alias. This is more complicated than some such changes because of files that define getrlimit64 in their own way using symbol versioning after including the main sysdeps/unix/sysv/linux/getrlimit64.c with a getrlimit macro defined. There are various existing patterns for such cases in glibc; the one I've used here is that a getrlimit64 macro disables the weak_alias / libc_hidden_weak calls, leaving it to the including file to define the getrlimit64 name in whatever way is appropriate. Tested for x86_64 and x86 that installed stripped shared libraries are unchanged by this patch. [BZ #17991] * include/sys/resource.h (__getrlimit64): Declare. Use libc_hidden_proto. * resource/getrlimit64.c (getrlimit64): Rename to __getrlimit64 and define as weak alias of __getrlimit64. Use libc_hidden_weak. * sysdeps/posix/spawni.c (__spawni): Call __getrlimit64 instead of getrlimit64. * sysdeps/unix/sysv/linux/getrlimit64.c (getrlimit64): Rename to __getrlimit64. [!getrlimit64] (getrlimit64): Define as weak alias of __getrlimit64. Use libc_hidden_weak. * sysdeps/unix/sysv/linux/i386/getrlimit64.c (getrlimit64): Define using __getrlimit64 not __new_getrlimit64. (__GI_getrlimit64): Likewise. * sysdeps/unix/sysv/linux/mips/getrlimit64.c (getrlimit64): Likewise. (__GI_getrlimit64): Likewise. (__old_getrlimit64): Use __getrlimit64 not __new_getrlimit64. * sysdeps/unix/sysv/linux/powerpc/powerpc64/syscalls.list (getrlimit): Add __getrlimit64 alias. * sysdeps/unix/sysv/linux/wordsize-64/syscalls.list (getrlimit): Likewise. * conform/Makefile (test-xfail-XOPEN2K/spawn.h/linknamespace): Remove variable. (test-xfail-POSIX2008/spawn.h/linknamespace): Likewise. (test-xfail-XOPEN2K8/spawn.h/linknamespace): Likewise.
* 2015-02-17 Steve Ellcey <sellcey@imgtec.com>Steve Ellcey2015-02-172-16/+16
| | | | | * sysdeps/mips/memcpy.S: Move R6 PREFETCH_STORE_HINT check. * sysdeps/mips/memset.S: Ditto.
* 2015-02-17 Steve Ellcey <sellcey@imgtec.com>Steve Ellcey2015-02-171-1/+1
| | | | * sysdeps/mips/bits/endian.h (__MIPSEL): Use #ifdef instead of #if.
* S390: Build failure due to nptl/pt-longjmp.c changes.Stefan Liebler2015-02-171-15/+4
|
* ia64: Remove custom lowlevellock.hTorvald Riegel2015-02-171-317/+0
| | | | | | | | | | | ia64 seems to use the same implementation of low-level locks as the generic Linux lowlevellock.h. The futex syscalls are somewhat different, but Roland thought it shouldn't matter. Note that the futex calls are on the slow path always (except for PI mutexes). Removing the custom low-level lock implementation will make further refactoring easier, for example adding proper error checking to futex operations.
* ia64: drop custom getpagesizeMike Frysinger2015-02-171-38/+0
| | | | This is equivalent to the common linux version now, so we can drop it.
* Fix sign of remquo zero remainder in round-downward mode (bug 17987).Joseph Myers2015-02-176-0/+18
| | | | | | | | | | | | | | | | | | | | | | Various remquo implementations produce a zero remainder with the wrong sign (a zero remainder should always have the sign of the first argument, as specified in IEEE 754) in round-downward mode, resulting from the sign of 0 - 0. This patch checks for zero results and fixes their sign accordingly. Tested for x86_64, x86, mips64 and powerpc. [BZ #17987] * sysdeps/ieee754/dbl-64/s_remquo.c (__remquo): Ensure sign of zero result does not depend on the sign resulting from subtraction. * sysdeps/ieee754/dbl-64/wordsize-64/s_remquo.c (__remquo): Likewise. * sysdeps/ieee754/flt-32/s_remquof.c (__remquof): Likewise. * sysdeps/ieee754/ldbl-128/s_remquol.c (__remquol): Likewise. * sysdeps/ieee754/ldbl-128ibm/s_remquol.c (__remquol): Likewise. * sysdeps/ieee754/ldbl-96/s_remquol.c (__remquol): Likewise. * math/libm-test.inc (remquo_test_data): Add more tests.
* Fix remquo spurious overflows (bug 17978).Joseph Myers2015-02-166-12/+12
| | | | | | | | | | | | | | | | | | | | | | | Various remquo implementations, when computing the last three bits of the quotient, have spurious overflows when 4 times the second argument to remquo overflows. These overflows can in turn cause bad results in rounding modes where that overflow results in a finite value. This patch adds tests to avoid the problem multiplications in cases where they would overflow, similar to those that control an earlier multiplication by 8. Tested for x86_64, x86, mips64 and powerpc. [BZ #17978] * sysdeps/ieee754/dbl-64/s_remquo.c (__remquo): Do not form products 4 * y and 2 * y where those would overflow. * sysdeps/ieee754/dbl-64/wordsize-64/s_remquo.c (__remquo): Likewise. * sysdeps/ieee754/flt-32/s_remquof.c (__remquof): Likewise. * sysdeps/ieee754/ldbl-128/s_remquol.c (__remquol): Likewise. * sysdeps/ieee754/ldbl-128ibm/s_remquol.c (__remquol): Likewise. * sysdeps/ieee754/ldbl-96/s_remquol.c (__remquol): Likewise. * math/libm-test.inc (remquo_test_data): Add more tests.
* Fix MIPS _ABIO64 -Werror=undef build.Joseph Myers2015-02-161-0/+4
| | | | | | | | | | | | | | | | I see an error ../sysdeps/mips/memcpy.S:209:68: error: "_ABIO64" is not defined [-Werror=undef] #if defined(_MIPS_SIM) && ((_MIPS_SIM == _ABIO32) || (_MIPS_SIM == _ABIO64)) ^ cc1: some warnings being treated as errors in MIPS builds. This patch arranges for _ABIO64 to be defined with the same value as GCC uses when building for O64 (the ABI itself isn't supported by glibc, but defining the macro seems the simplest way of avoiding the error in code that may be shared with other C libraries). * sysdeps/mips/sgidefs.h [!_ABIO64] (_ABIO64): New macro.
* Fix MIPS _COMPILING_NEWLIB -Werror=undef build.Joseph Myers2015-02-163-3/+3
| | | | | | | | | | | | | | | | | | | | | | I see an error ../sysdeps/mips/strcmp.S:25:7: error: "_COMPILING_NEWLIB" is not defined [-Werror=undef] #elif _COMPILING_NEWLIB ^ cc1: some warnings being treated as errors in MIPS builds. (This is with GCC 4.9; it's possible that the DR#412 change in GCC 5 - see <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60570> - means that -Wundef diagnostics no longer occur for #elif conditions where a previous group's condition was true, just as with other errors there.) This patch duly adjusts the conditionals to test whether _COMPILING_NEWLIB is defined. * sysdeps/mips/memcpy.S [_COMPILING_NEWLIB]: Change condition to [defined _COMPILING_NEWLIB]. * sysdeps/mips/memset.S [_COMPILING_NEWLIB]: Likewise. * sysdeps/mips/strcmp.S [_COMPILING_NEWLIB]: Likewise.
* Fix MIPS __mips_isa_rev -Werror=undef build.Joseph Myers2015-02-161-1/+1
| | | | | | | | | | | | | | | | | | | | I see an error In file included from ../sysdeps/mips/include/sys/asm.h:20:0, from ../sysdeps/mips/start.S:39: ../sysdeps/mips/sys/asm.h:421:5: error: "__mips_isa_rev" is not defined [-Werror=undef] #if __mips_isa_rev < 6 ^ cc1: some warnings being treated as errors in MIPS builds. As sys/asm.h is an installed header, it seems better to test for !defined __mips_isa_rev here, instead of defining it to 0 as done in sysdeps/unix/mips/sysdep.h, to avoid perturbing any code outside glibc that tests whether __mips_isa_rev is defined; this patch does so. * sysdeps/mips/sys/asm.h [__mips_isa_rev < 6]: Change condition to [!defined __mips_isa_rev || __mips_isa_rev < 6].
* ia64: remove fixed page size macros and others [BZ #17792]Matthew Fortune2015-02-151-6/+0
| | | | | | | | | | | | Remove IA64 PAGE_SIZE related macros as PAGE_SIZE is not defined. Also remove macros that are only used for BFD's trad-core support which is not relavant for IA64 according to the thread starting here: https://sourceware.org/ml/libc-ports/2013-11/msg00028.html This patch is neither built nor tested but is equivalent to a MIPS patch for the same fix.
* 2015-02-13 Steve Ellcey <sellcey@imgtec.com>Steve Ellcey2015-02-133-6/+6
| | | | | | * sysdeps/mips/bits/endian.h (__MIPSEB): Use #ifdef instead of #if. * sysdeps/mips/memcpy.S (__MIPSEB): Ditto. * sysdeps/mips/memset.S (__MIPSEB): Ditto.
* Add placeholder c++-types.data and *.abilist files.Roland McGrath2015-02-1311-0/+22
|
* Fix dbl-64/wordsize-64 remquo (bug 17569).Joseph Myers2015-02-131-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The dbl-64/wordsize-64 remquo implementation follows similar logic to various other implementations, but where that logic computes some absolute values, it wrongly uses a previously computed bit-pattern for the absolute value of the first argument, where actually it needs the absolute value of the first argument mod 8 times the second. This patch fixes it to compute the correct absolute value. The integer quotient result of remquo is only specified mod 8 (including its sign); architecture-specific versions may well vary in what results they give for higher bits of that result (and indeed bug 17569 gives an example correct result from __builtin_remquo giving 9 for that result, where the particular glibc implementation used in that bug report would give 1 after this fix). Thus, this patch adapts the tests of remquo to test that result only mod 8, to allow for such variation when tests with higher quotient are included. Tested for x86_64 and x86. [BZ #17569] * sysdeps/ieee754/dbl-64/wordsize-64/s_remquo.c (__remquo): Compute absolute value of x as modified by fmod, not original value of x. * math/libm-test.inc (RUN_TEST_ffI_f1): Rename to RUN_TEST_ffI_f1_mod8. Check extra return value mod 8. (RUN_TEST_LOOP_ffI_f1): Rename to RUN_TEST_LOOP_ffI_f1_mod8. Call RUN_TEST_ffI_f1_mod8. (remquo_test_data): Add more tests.
* NPTL: Initializer for .init_array-only configurations.Roland McGrath2015-02-131-0/+23
|
* Fix powerpc software sqrtf (bug 17967).Joseph Myers2015-02-131-11/+13
| | | | | | | | | | | | | | | | | | | Similarly to sqrt in <https://sourceware.org/ml/libc-alpha/2015-02/msg00353.html>, the powerpc sqrtf implementation for when _ARCH_PPCSQ is not defined also relies on a * b + c being contracted into a fused multiply-add. Although this contraction is not explicitly disabled for e_sqrtf.c, it still seems appropriate to make the file explicit about its requirements by using __builtin_fmaf; this patch does so. Furthermore, it turns out that doing so fixes the observed inaccuracy and missing exceptions (that is, that without explicit __builtin_fmaf usage, it was not being compiled as intended). Tested for powerpc32 (hard float). [BZ #17967] * sysdeps/powerpc/fpu/e_sqrtf.c (__slow_ieee754_sqrtf): Use __builtin_fmaf instead of relying on contraction of a * b + c.
* Fix powerpc software sqrt (bug 17964).Joseph Myers2015-02-121-15/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As Adhemerval noted in <https://sourceware.org/ml/libc-alpha/2015-01/msg00451.html>, the powerpc sqrt implementation for when _ARCH_PPCSQ is not defined is inaccurate in some cases. The problem is that this code relies on fused multiply-add, and relies on the compiler contracting a * b + c to get a fused operation. But sysdeps/ieee754/dbl-64/Makefile disables contraction for e_sqrt.c, because the implementation in that directory relies on *not* having contracted operations. While it would be possible to arrange makefiles so that an earlier sysdeps directory can disable the setting in sysdeps/ieee754/dbl-64/Makefile, it seems a lot cleaner to make the dependence on fused operations explicit in the .c file. GCC 4.6 introduced support for __builtin_fma on powerpc and other architectures with such instructions, so we can rely on that; this patch duly makes the code use __builtin_fma for all such fused operations. Tested for powerpc32 (hard float). 2015-02-12 Joseph Myers <joseph@codesourcery.com> [BZ #17964] * sysdeps/powerpc/fpu/e_sqrt.c (__slow_ieee754_sqrt): Use __builtin_fma instead of relying on contraction of a * b + c.
* Use -Werror=undef for assembly code.Roland McGrath2015-02-122-8/+8
|
* Fix exp2 spurious underflows (bug 16560).Joseph Myers2015-02-124-2/+24
| | | | | | | | | | | | | | | | | | | | | | This patch fixes the remaining part of bug 16560, spurious underflows from exp2 of arguments close to 0 (when the result is close to 1, so should not underflow), by just using 1+x instead of a more complicated calculation when the argument is sufficiently small. Tested for x86_64, x86 and mips64. [BZ #16560] * math/e_exp2l.c [LDBL_MANT_DIG == 106] (LDBL_EPSILON): Undefine and redefine. (__ieee754_exp2l): Do not multiply small fractional parts by M_LN2l. * sysdeps/i386/fpu/e_exp2l.S (__ieee754_exp2l): Just add 1 to small argument. * sysdeps/ieee754/dbl-64/e_exp2.c (__ieee754_exp2): Likewise. * sysdeps/ieee754/flt-32/e_exp2f.c (__ieee754_exp2f): Likewise. * sysdeps/x86_64/fpu/e_exp2l.S (__ieee754_exp2l): Likewise. * math/auto-libm-test-in: Add more tests of exp2. * math/auto-libm-test-out: Regenerated.
* powerpc: POWER7 strncpy optimization for unaligned stringRajalakshmi Srinivasaraghavan2015-02-121-2/+378
| | | | | | | | | | | | | This patch optimizes strncpy for power7 for unaligned source or destination address. The source or destination address is aligned to doubleword and data is shifted based on the alignment and added with the previous loaded data to be written as a doubleword. For each load, cmpb instruction is used for faster null check. The new optimization shows 10 to 70% of performance improvement for longer string though it does not show big difference on string size less than 16 due to additional checks.Hence this new algorithm is restricted to string greater than 16.
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-08-04 11:09:40 +0000