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Thiago Macieira 6e2ad0c79c ucstrncmp: refactor with 32- and 8-byte loads 
First of all, this removes the UB that used to try and calculate the
distance between the two strings. That's a valid technique in assembly,
but dangerous in C++ and totally unnecessary. The compiler is perfectly
able to generate loops with a single induction variable all on its own.

Second, this commit makes the main loop use 32-byte comparisons (16
characters at a time), which is a reasonable size for strings. We use
AVX2 if that's available, or an unrolled pair of 16-byte loads
otherwise. After the existing 16-byte comparison, this commit inserts an
8-byte (4-character) comparison and then reduces the final, unrolled
comparison to just 3 characters.

Change-Id: Ib48364abee9f464c96c6fffd152e474b39e1f293
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
2018-05-15 17:09:01 +00:00
bin Merge remote-tracking branch 'origin/5.11.0' into 5.11 2018-05-09 13:48:42 +02:00
config.tests Merge remote-tracking branch 'origin/5.9' into 5.11 2018-02-14 12:51:24 +01:00
dist Add changes file for Qt 5.11.0 2018-04-30 11:54:51 +00:00
doc Doc: Update Find Files example 2018-04-09 06:50:52 +00:00
examples QLineEdit example: fix link to QLineEdit::setInputMask 2018-05-09 17:45:29 +00:00
lib Purge all fonts 2015-08-18 19:59:14 +00:00
mkspecs Fix build of applications on iOS 2018-05-13 08:48:53 +00:00
qmake qmake: Don't map Xcode SYMROOT to output directory 2018-04-26 14:19:21 +00:00
src ucstrncmp: refactor with 32- and 8-byte loads 2018-05-15 17:09:01 +00:00
tests Skip tst_QProcess::processesInMultipleThreads under QEMU 2018-05-14 12:36:33 +00:00
util QtEdidSupport: Fix private headers 2018-02-02 07:21:49 +00:00
.gitattributes
.gitignore gitignore: don't ignore Info.plist templates for libraries 2017-11-23 07:07:48 +00:00
.qmake.conf Bump version 2018-02-08 17:07:19 +01:00
.tag
config_help.txt configure: mention -libudev in help output 2018-04-20 10:38:03 +00:00
configure configure: Detect Cocoa instead of Carbon 2018-04-05 21:04:22 +00:00
configure.bat configure: Prefer cl.exe over clang-cl.exe 2018-01-04 21:22:42 +00:00
configure.json configure: don't emit empty GCC_MACHINE_DUMP to qdevice.pri 2018-04-25 18:53:33 +00:00
configure.pri Configure: Restore default prefix on Windows 2018-04-09 15:32:19 +00:00
header.BSD Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.COMM Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.FDL Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.GPL Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.GPL-EXCEPT Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.LGPL Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.LGPL3 Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.LGPL3-COMM Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.LGPL-NOGPL2 Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.LGPL-ONLY Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
INSTALL Doc: Update links in INSTALL file 2015-02-16 09:06:41 +00:00
LGPL_EXCEPTION.txt Update copyright headers 2015-02-11 06:49:51 +00:00
LICENSE.FDL
LICENSE.GPL2 Add new license header templates and license files 2016-01-14 20:43:46 +00:00
LICENSE.GPL3 Add new license header templates and license files 2016-01-14 20:43:46 +00:00
LICENSE.GPL3-EXCEPT Add new license header templates and license files 2016-01-14 20:43:46 +00:00
LICENSE.LGPL3 Add new license header templates and license files 2016-01-14 20:43:46 +00:00
LICENSE.LGPLv3 Remove LICENSE.GPLv3, LICENSE.LGPLv21, LGPL_EXCEPTION.txt 2018-04-16 11:02:14 +00:00
LICENSE.PREVIEW.COMMERCIAL Add new license header templates and license files 2016-01-14 20:43:46 +00:00
qtbase.pro nuke configure -host-option 2016-12-13 18:55:59 +00:00
sync.profile Testlib: Rename qtest_global.h to qttestglobal.h 2018-03-21 10:31:01 +00:00