diff options
Diffstat (limited to 'src/corelib/tools/qsimd_p.h')
| -rw-r--r-- | src/corelib/tools/qsimd_p.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/corelib/tools/qsimd_p.h b/src/corelib/tools/qsimd_p.h index db2f546651..c28624a25e 100644 --- a/src/corelib/tools/qsimd_p.h +++ b/src/corelib/tools/qsimd_p.h @@ -346,6 +346,15 @@ extern Q_CORE_EXPORT QBasicAtomicInteger<unsigned> qt_cpu_features[2]; #endif Q_CORE_EXPORT quint64 qDetectCpuFeatures(); +#if defined(Q_PROCESSOR_X86) && QT_COMPILER_SUPPORTS_HERE(RDRND) +Q_CORE_EXPORT qsizetype qRandomCpu(void *, qsizetype) noexcept; +#else +static inline qsizetype qRandomCpu(void *, qsizetype) noexcept +{ + return 0; +} +#endif + static inline quint64 qCpuFeatures() { quint64 features = qt_cpu_features[0].loadRelaxed(); @@ -362,6 +371,15 @@ static inline quint64 qCpuFeatures() #define qCpuHasFeature(feature) (((qCompilerCpuFeatures & CpuFeature ## feature) == CpuFeature ## feature) \ || ((qCpuFeatures() & CpuFeature ## feature) == CpuFeature ## feature)) +inline bool qHasHwrng() +{ +#if defined(Q_PROCESSOR_X86) && QT_COMPILER_SUPPORTS_HERE(RDRND) + return qCpuHasFeature(RDRND); +#else + return false; +#endif +} + #define ALIGNMENT_PROLOGUE_16BYTES(ptr, i, length) \ for (; i < static_cast<int>(qMin(static_cast<quintptr>(length), ((4 - ((reinterpret_cast<quintptr>(ptr) >> 2) & 0x3)) & 0x3))); ++i) |