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* Cygwin: fix a race in the FAST_CWD fallback codeCorinna Vinschen2018-07-101-22/+17
| | | | | | | | | | Guard the entire operation with the FastPebLock critical section used by RtlSetCurrentDirectory_U as well, thus eliminating the race between concurrent chdir/fchdir/SetCurrentDirectory calls. Streamline comment explaining the fallback method. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Update config.guess and config.subSebastian Huber2018-07-062-1129/+1144
| | | | | | | Update to the latest versions of config.sub (2018-07-03) and config.guess (2018-06-26). Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
* Fix a problem that connection to syslogd fails.Takashi Yano2018-07-062-19/+17
| | | | | | | * fhandler_socket_local.cc (get_inet_addr_local): Change type from 'static int' to 'int' to be callable from syslog.cc. * syslog.cc (connect_syslogd): Use get_inet_addr_local() instead of getsockname() to retrieve name information of the syslogd socket.
* Fix namespace issues in sinf, cosf and sincosfSzabolcs Nagy2018-07-065-18/+19
| | | | | | Use const sincos_t for clarity instead of making the typedef const. Use __inv_pi4 and __sincosf_table to avoid namespace issues with static linking.
* Fix large ulp error in pow without fma very near 1.0Szabolcs Nagy2018-07-061-2/+4
| | | | | | | | | | | The !HAVE_FAST_FMA code path split r = z/c - 1 into r = rhi + rlo such that when z = 1-tiny and c = 1 then rlo and rhi could have much larger magnitude than r which later caused large rounding errors. So do a nearest rounding instead of truncation at the split. In newlib with default settings this was observable on some arm targets that enable the new math code but has no fma.
* Change the return type of converttoint and document the semanticsSzabolcs Nagy2018-07-061-1/+9
| | | | | | | | | | | | | | | | | | | 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 natural return type is 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. In newlib with default settings only aarch64 is affected and there is no significant code generation change with gcc after the patch.
* Remove unused TOINT_RINT and TOINT_SHIFT macrosSzabolcs Nagy2018-07-062-10/+1
| | | | Only have separate code paths for TOINT_INTRINSICS and !TOINT_INTRINSICS.
* Move __HAVE_FAST_FMA to math_config.hSzabolcs Nagy2018-07-067-35/+21
| | | | | | Define it consistently with other HAVE_* macros that only affect code using math_config.h. This is also closer to the Arm Optimized Routines code.
* Fix code style and comments of new math codeSzabolcs Nagy2018-07-068-74/+134
| | | | | | | Synchronize code style and comments with Arm Optimized Routines, there are no code changes in this patch. This ensures different projects using the same code have consistent code style so bug fix patches can be applied more easily.
* Fix newlib functions perror()/psignal() not to use writev().Takashi Yano2018-07-052-37/+39
| | | | | | | | This fix is for some platforms which do not have writev(). *perror.c: Use _write_r() instead of writev(). *psignal.c: Use write() insetad of writev(). Revise commit: d4f4e7ae1be1bcf8c021f2b0865aafc16b338aa3
* Cygwin: Include local ntsecapi.hTakashi Yano2018-07-041-1/+1
| | | | | | | | | | Our local ntsecapi.h wrapper corrects a bug in the definition of SystemFunction036 which otherwise leads to crashes on 32 bit when using RtlGenRandom. The fhandler_socket_local.cc file accidentally included the incorrect w32api version of that file, rather than the local wrapper. Fix it. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Fix a bug of perror()/psignal() that changes the orientation of stderr.Takashi Yano2018-07-042-8/+54
| | | | | | * perror.c: Fix the problem that perror() changes the orientation of stderr to byte-oriented mode if stderr is not oriented yet. * psignal.c: Ditto.
* Fix a bug of psiginfo() that changes the orientation of stderr.Takashi Yano2018-07-031-6/+35
| | | | | | * strsig.cc (psiginfo): Fix the problem that psiginfo() changes the orientation of stderr to byte-oriented mode if stderr is not oriented yet.
* Introduce @unless/@endunless and postbootstrap Makefile targetsAlexandre Oliva2018-06-304-166/+135
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch turns dependencies of non-bootstrap targets on bootstrap targets for bootstrap builds into dependencies on stage_last. This arrangement gets stage1-bubble to run from stage_last if we haven't started a bootstrap yet, and to use the current stage otherwise. This was already the case of target libs, just not of non-bootstrapped host modules. In order to retain preexisting dependencies in non-bootstrap builds, or in gcc-less builds, this introduces support for @unless/@endunless pairs in Makefile.in. There is a remaining possibility of problem if activating, in a tree configured for bootstrap, a parallel build of two or more modules, at least one bootstrapped and one not. In this case, make might decide to build stage_current and stage_last in parallel, the latter will start a submake to build stage1 while the initial make, having satisfied stage_current, proceeds to build the bootstrapped module in non-bootstrapped configurations. The two builds will overlap and will likely conflict. This situation does NOT arise in normal settings, however: a post-bootstrap build of all-host all-target will indeed activate such targets concurrently, but only after building all bootstrapped modules successfully, and it will have both stage_last and stage_current targets already satisfied, so the potential race between builds will not arise. Another remaining problem, that is slightly expanded with this patch, is that of an interrupted build in a tree configured for bootstrap, continued with a non-bootstrapped target. Target modules that were not bootstrapped would already fail to complete the current stage when activated explicitly in the command line for a retry; host modules, however, would attempt to build their bootstrapped dependencies, which is what led to the problem of concurrent builds addressed with this patch. An interrupted or failed build might still recover correctly, if the non-bootstrapped target is activated in both builds, because then make will remove stage_last when its build command is interrupted, so that it will attempt to recreate it with stage1-bubble in the second try. A bootstrap build, however, will not be attempting to build stage_last, so the file will remain and the retry won't go through stage1-bubble. We have lived with that for target modules, so we can probably live with that for host modules too. Another undesirable consequence of this change is that non-boostrapped host modules, in a tree configured for bootstrap, when activated as make all-<module>, will build all of stage1 instead of only the module's usual dependencies. This is intentional and necessary to fix the parallel-build problem. If it's not desirable, disabling the unnecessary bootstrap configuration will suffice to restore the original set of dependencies. for ChangeLog * configure.ac: Introduce support for @unless/@endunless. * Makefile.tpl (dep-kind): Rewrite with cond; return postbootstrap in some cases. (make-postboot-dep, postboot-targets): New. (dependencies): Do not output postbootstrap dependencies at first. Output non-target ones changed for configure to depend on stage_last @if gcc-bootstrap, and the original deps @unless gcc-bootstrap. * configure.in, Makefile.in: Rebuilt.
* Add OBJCOPY to Makefile.tpl too, to keep it on Makefile.in rebuildAlexandre Oliva2018-06-301-0/+1
| | | | | | | for ChangeLog * Makefile.tpl (OBJCOPY): Add it. * Makefile.in: Rebuilt, unchanged.
* Cygwin: tape: Handle non-standard "no medium" error codeCorinna Vinschen2018-06-292-5/+26
| | | | | | | | | | | | | | | | Certain tape drives (known example: QUANTUM_ULTRIUM-HH6) return the non-standard ERROR_NOT_READY rather than ERROR_NO_MEDIA_IN_DRIVE if no media is present. ERROR_NOT_READY is not documented as valid return code from GetTapeStatus. Without handling this error code Cygwin's tape code can't report an offline state to user space. Fix this by converting ERROR_NOT_READY to ERROR_NO_MEDIA_IN_DRIVE where appropriate. Add a debug_printf to mtinfo_drive::get_status to allow requesting user info without having to rebuild the DLL. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: define pthread_tryjoin_np/pthread_timedjoin_np _GNU_VISIBLECorinna Vinschen2018-06-271-2/+2
| | | | | | These functions are GNU extensions. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: doc: add pthread_tryjoin_np, pthread_timedjoin_npCorinna Vinschen2018-06-272-1/+3
| | | | Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: pthread_timedjoin_np: return ETIMEDOUT, not EBUSYCorinna Vinschen2018-06-271-2/+2
| | | | | | | | | pthread_timedjoin_np returns ETIMEDOUT if a thread is still running, not EBUSY as pthread_tryjoin_np. Also, clean up initializing timeout in pthread_tryjoin_np. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: Implement pthread_tryjoin_np and pthread_timedjoin_npCorinna Vinschen2018-06-277-11/+42
| | | | | | | | | - Move pthread_join to thread.cc to have all `join' calls in the same file (pthread_timedjoin_np needs pthread_convert_abstime which is static inline in thread.cc) - Bump API version Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* newlib: enable new math functions on CygwinCorinna Vinschen2018-06-271-0/+4
| | | | Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* New pow implementationSzabolcs Nagy2018-06-278-5/+607
| | | | | | | | | | | | The new implementation is provided under !__OBSOLETE_MATH, it uses ISO C99 code. With default settings the worst case error in nearest rounding mode is 0.54 ULP with inlined fma and fma contraction. It uses a 4 KB lookup table in addition to the table in exp_data.c, on aarch64 .text+.rodata size of libm.a is increased by 2295 bytes. Improvements on Cortex-A72: latency: 3.3x thruput: 4.9x
* New log2 implementationSzabolcs Nagy2018-06-276-4/+399
| | | | | | | | | | | | | | | The new implementation is provided under !__OBSOLETE_MATH, it uses ISO C99 code. With default settings the worst case error in nearest rounding mode is 0.547 ULP with inlined fma and fma contraction. It uses a 1 KB lookup table, on aarch64 .text+.rodata size of libm.a is increased by 1584 bytes. Note that the math.h header defines log2(x) to be log(x)/Ln2, this is not changed, so the new code is only used if that macro is suppressed. Improvements on Cortex-A72: latency: 2.0x thruput: 2.2x
* New log implementationSzabolcs Nagy2018-06-279-4/+744
| | | | | | | | | | | | | | | | | | | | The new implementations are provided under !__OBSOLETE_MATH, it uses ISO C99 code. With default settings the worst case error in nearest rounding mode is 0.519 ULP with inlined fma and fma contraction. It uses a 2 KB lookup table, on aarch64 .text+.rodata size of libm.a is increased by 1703 bytes. The w_log.c wrapper is disabled since error handling is inline in the new code. New __HAVE_FAST_FMA and __HAVE_FAST_FMA_DEFAULT feature macros were added to enable selecting between the code path that uses fma and the one that does not. Targets supposed to set __HAVE_FAST_FMA_DEFAULT if they have single instruction fma and the compiler can actually inline it (gcc has __FP_FAST_FMA macro but that does not guarantee inlining with -fno-builtin-fma). Improvements on Cortex-A72: latency: 1.9x thruput: 2.3x
* New exp and exp2 implementationsSzabolcs Nagy2018-06-2711-5/+1138
| | | | | | | | | | | | | | | | | | | | | | The new implementations are provided under !__OBSOLETE_MATH, they use ISO C99 code. There are several settings, with the default one the worst case error in nearest rounding mode is 0.509 ULP for exp and 0.507 ULP for exp2 when a multiply and add is contracted into an fma. They use a shared 2 KB lookup table, on aarch64 .text+.rodata size of libm.a is increased by 1868 bytes. The w_*.c wrappers are disabled for the new code as it takes care of error handling inline. The old exp2(x) code used to be just pow(2,x) so the speedup there is more significant. The file name has no special prefix to avoid any name collision with existing files. Improvements on Cortex-A72: exp latency: 3.2x exp thruput: 4.1x exp2 latency: 7.8x exp2 thruput: 18.8x
* Use uint32_t sign argument to math error functionsSzabolcs Nagy2018-06-273-13/+13
| | | | | | | | | | This change is equivalent to the commit https://github.com/ARM-software/optimized-routines/commit/c65db17340782d647c49e17cbba244862dc38402 and only affects code that is from the Arm optimized-routines project. It does not affect the observable behaviour, but the code generation can be different on 64bit targets. The intention is to make the portable semantics of the code obvious by using a fixed size type.
* Cygwin: fix bumptious GCC 7 warningsCorinna Vinschen2018-06-262-3/+9
| | | | Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: Allow to build without experimental AF_UNIX code by defaultCorinna Vinschen2018-06-268-1/+36
| | | | | | Introduce __WITH_AF_UNIX preprocessor flag to enable the new code Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: add Unicode patch to release notesCorinna Vinschen2018-06-261-0/+3
| | | | Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Fix Unicode table.Takashi Yano2018-06-262-26/+16
| | | | | | | | | * (mkcategories): Fix a bug that outputs incorrect Unicode category table for code point ranges. * (categories.t): Rebuild it using the bug-fixed mkcategories. This fixes the problem reported in the following post. https://cygwin.com/ml/cygwin/2018-06/msg00248.html
* Revert "Remove -fno-builtin to allow gcc to inline functions such as fabs, ↵Corinna Vinschen2018-06-268-8/+8
| | | | | | | | floor, creal, imag." This reverts commit c077b9de99c6980a0c1631ec2938f6ff2cf0c289. Yet another accidental commit...
* Cygwin: exceptions: fix FPE exception flagsCorinna Vinschen2018-06-262-1/+10
| | | | | | The FPE flags for divisions by zero were not implemented Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: signal.h: improve exception flags definitionCorinna Vinschen2018-06-261-5/+39
| | | | | | | - add numbers for readability - add a preprocessor macro for each flag Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Remove -fno-builtin to allow gcc to inline functions such as fabs, floor, ↵Jon Beniston2018-06-258-8/+8
| | | | creal, imag.
* Fix the handling of out-of-band (OOB) data in a socket.Takashi Yano2018-06-223-9/+120
| | | | | | | | | | | | | | | | | | | | | | * fhandler.h (class fhandler_socket_inet): Add variable bool oobinline. * fhandler_socket_inet.cc (fhandler_socket_inet::fhandler_socket_inet): Initialize variable oobinline. (fhandler_socket_inet::recv_internal): Make the handling of OOB data as consistent with POSIX as possible. Add simulation of inline mode for OOB data as a workaround for broken winsock behavior. (fhandler_socket_inet::setsockopt): Ditto. (fhandler_socket_inet::getsockopt): Ditto. (fhandler_socket_wsock::ioctl): Fix return value of SIOCATMARK command. The return value of SIOCATMARK of winsock is almost opposite to expectation. * fhandler_socket_local.cc (fhandler_socket_local::recv_internal): Remove the handling of OOB data from AF_LOCAL domain socket. Operation related to OOB data will result in an error like Linux does. (fhandler_socket_local::sendto): Ditto. (fhandler_socket_local::sendmsg): Ditto. This fixes the issue reported in following post. https://cygwin.com/ml/cygwin/2018-06/msg00143.html
* Improve performance of sinf/cosf/sincosfWilco Dijkstra2018-06-2111-6/+667
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Here is the correct patch with both filenames and int cast fixed: This patch is a complete rewrite of sinf, cosf and sincosf. The new version is significantly faster, as well as simple and accurate. The worst-case ULP is 0.56072, maximum relative error is 0.5303p-23 over all 4 billion inputs. In non-nearest rounding modes the error is 1ULP. The algorithm uses 3 main cases: small inputs which don't need argument reduction, small inputs which need a simple range reduction and large inputs requiring complex range reduction. The code uses approximate integer comparisons to quickly decide between these cases - on some targets this may be slow, so this can be configured to use floating point comparisons. The small range reducer uses a single reduction step to handle values up to 120.0. It is fastest on targets which support inlined round instructions. The large range reducer uses integer arithmetic for simplicity. It does a 32x96 bit multiply to compute a 64-bit modulo result. This is more than accurate enough to handle the worst-case cancellation for values close to an integer multiple of PI/4. It could be further optimized, however it is already much faster than necessary. Simple benchmark showing speedup factor on AArch64 for various ranges: range 0.7853982 sinf 1.7 cosf 2.2 sincosf 2.8 range 1.570796 sinf 1.9 cosf 1.9 sincosf 2.7 range 3.141593 sinf 2.0 cosf 2.0 sincosf 3.5 range 6.283185 sinf 2.3 cosf 2.3 sincosf 4.2 range 125.6637 sinf 2.9 cosf 3.0 sincosf 5.1 range 1.1259e15 sinf 26.8 cosf 26.8 sincosf 45.2 ChangeLog: 2018-05-18 Wilco Dijkstra <wdijkstr@arm.com> * newlib/libm/common/Makefile.in: Regenerated. * newlib/libm/common/Makefile.am: Add sinf.c, cosf.c, sincosf.c sincosf.h, sincosf_data.c. Add -fbuiltin -fno-math-errno to CFLAGS. * newlib/libm/common/math_config.h: Add HAVE_FAST_ROUND, HAVE_FAST_LROUND, roundtoint, converttoint, force_eval_float, force_eval_double, eval_as_float, eval_as_double, likely, unlikely. * newlib/libm/common/cosf.c: New file. * newlib/libm/common/sinf.c: Likewise. * newlib/libm/common/sincosf.h: Likewise. * newlib/libm/common/sincosf.c: Likewise. * newlib/libm/common/sincosf_data.c: Likewise. * newlib/libm/math/sf_cos.c: Add #if to build conditionally. * newlib/libm/math/sf_sin.c: Likewise. * newlib/libm/math/wf_sincos.c: Likewise. --
* Revert "Improve performance of sinf/cosf/sincosf"Corinna Vinschen2018-06-2111-667/+6
| | | | | | This reverts commit fca80a9d1b3fa6620cdaccec6b726eef1a6530a1. Accidentally pushed a preliminary version
* libm/common/s_round.c (round): Add cast for 16-bit CPUsJon Beniston2018-06-211-1/+1
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* Improve performance of sinf/cosf/sincosfWilco Dijkstra2018-06-1911-6/+667
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch is a complete rewrite of sinf, cosf and sincosf. The new version is significantly faster, as well as simple and accurate. The worst-case ULP is 0.56072, maximum relative error is 0.5303p-23 over all 4 billion inputs. In non-nearest rounding modes the error is 1ULP. The algorithm uses 3 main cases: small inputs which don't need argument reduction, small inputs which need a simple range reduction and large inputs requiring complex range reduction. The code uses approximate integer comparisons to quickly decide between these cases - on some targets this may be slow, so this can be configured to use floating point comparisons. The small range reducer uses a single reduction step to handle values up to 120.0. It is fastest on targets which support inlined round instructions. The large range reducer uses integer arithmetic for simplicity. It does a 32x96 bit multiply to compute a 64-bit modulo result. This is more than accurate enough to handle the worst-case cancellation for values close to an integer multiple of PI/4. It could be further optimized, however it is already much faster than necessary. Simple benchmark showing speedup factor on AArch64 for various ranges: range 0.7853982 sinf 1.7 cosf 2.2 sincosf 2.8 range 1.570796 sinf 1.9 cosf 1.9 sincosf 2.7 range 3.141593 sinf 2.0 cosf 2.0 sincosf 3.5 range 6.283185 sinf 2.3 cosf 2.3 sincosf 4.2 range 125.6637 sinf 2.9 cosf 3.0 sincosf 5.1 range 1.1259e15 sinf 26.8 cosf 26.8 sincosf 45.2 ChangeLog: 2018-06-18 Wilco Dijkstra <wdijkstr@arm.com> * newlib/libm/common/Makefile.in: Regenerated. * newlib/libm/common/Makefile.am: Add sinf.c, cosf.c, sincosf.c sincosf.h, sincosf_data.c. Add -fbuiltin -fno-math-errno to CFLAGS. * newlib/libm/common/math_config.h: Add HAVE_FAST_ROUND, HAVE_FAST_LROUND, roundtoint, converttoint, force_eval_float, force_eval_double, eval_as_float, eval_as_double, likely, unlikely. * newlib/libm/common/cosf.c: New file. * newlib/libm/common/sinf.c: Likewise. * newlib/libm/common/sincosf.h: Likewise. * newlib/libm/common/sincosf.c: Likewise. * newlib/libm/common/sincosf_data.c: Likewise. * newlib/libm/math/sf_cos.c: Add #if to build conditionally. * newlib/libm/math/sf_sin.c: Likewise. * newlib/libm/math/wf_sincos.c: Likewise. --
* newlib: getopt now permutes multi-flag options correctlyThomas Kindler2018-06-182-13/+23
| | | | | | | Previously, "test 1 2 3 -a -b -c" was permuted to "test -a -b -c 1 2 3", but "test 1 2 3 -abc" was left as "test 1 2 3 -abc". Signed-off-by: Thomas Kindler <mail+newlib@t-kindler.de>
* Bump Cygwin DLL version to 2.11.0Ken Brown2018-06-071-2/+2
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* Cygwin: Document clearenv and bump API minorKen Brown2018-06-074-1/+24
| | | | Also add earlier "What changed" items to new-features.xml.
* Cygwin: Remove workaround in environ.ccKen Brown2018-06-071-6/+4
| | | | | | | Commit ebd645e on 2001-10-03 made environ.cc:_addenv() add unneeded space at the end of the environment block to "work around problems with some buggy applications." This clutters the code and is presumably no longer needed.
* Cygwin: Implement the GNU extension clearenvKen Brown2018-06-073-0/+24
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* Cygwin: Allow the environment pointer to be NULLKen Brown2018-06-072-17/+30
| | | | Following glibc, interpret this as meaning the environment is empty.
* Cygwin: Clarify some code in environ.ccKen Brown2018-06-071-1/+7
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* Cygwin: Add pthread_rwlock_* fix to release notesKen Brown2018-06-011-0/+3
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* Declare the pthread_rwlock_* functions if __cplusplus >= 201402LKen Brown2018-06-011-1/+1
| | | | Some of these functions are used in the <shared_mutex> C++ header.
* Cygwin: Add stack alignment crash after fork fix to release notesCorinna Vinschen2018-05-291-0/+4
| | | | Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
* Cygwin: Fixing the math behind rounding down ch.stacklimit to page size.Sergejs Lukanihins2018-05-291-1/+1
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