AuroraMiddleware/qt5base-lts
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Fix gcc 6.4 builds

Browse Source 
The builtins clzs and ctzs have been removed. Additionally they were
never proper internal GCC builtins and shouldn't have been used in a
constexpr function in the first place. This patch removes the assumption
that they exist when BMI is available, and let GCC fall back to using
__builtin_clz and __builtin_ctz.

Change-Id: I3e0b4e246098bb9ce6ede28b311948260ef881b9
Task-number: QTBUG-56813
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This commit is contained in:
Allan Sandfeld Jensen 2016-12-12 23:53:22 +01:00 committed by Jani Heikkinen
parent 4c0760d327
commit bb0f29f82b
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
src/corelib/tools/qalgorithms.h
View File

@ -535,7 +535,7 @@ QT_DEPRECATED_X("Use std::binary_search") Q_OUTOFLINE_TEMPLATE RandomAccessItera
# define QT_HAS_BUILTIN_CTZS
Q_DECL_CONSTEXPR Q_ALWAYS_INLINE uint qt_builtin_ctzs(quint16 v) Q_DECL_NOTHROW
{
# if QT_HAS_BUILTIN(__builtin_ctzs) || defined(__BMI__)
# if QT_HAS_BUILTIN(__builtin_ctzs)
return __builtin_ctzs(v);
# else
return __builtin_ctz(v);
@ -544,7 +544,7 @@ Q_DECL_CONSTEXPR Q_ALWAYS_INLINE uint qt_builtin_ctzs(quint16 v) Q_DECL_NOTHROW
#define QT_HAS_BUILTIN_CLZS
Q_DECL_CONSTEXPR Q_ALWAYS_INLINE uint qt_builtin_clzs(quint16 v) Q_DECL_NOTHROW
{
# if QT_HAS_BUILTIN(__builtin_clzs) || defined(__BMI__)
# if QT_HAS_BUILTIN(__builtin_clzs)
return __builtin_clzs(v);
# else
return __builtin_clz(v) - 16U;