diff options
| author | Thiago Macieira <thiago.macieira@intel.com> | 2015-07-17 13:27:35 -0700 |
|---|---|---|
| committer | Thiago Macieira <thiago.macieira@intel.com> | 2015-08-06 04:53:44 +0000 |
| commit | 01f3530650f9f6f4c08520263a3c62281d81e3fc (patch) | |
| tree | 7e23d37bdeb2d0a74dbcf96c436afca9afb41f50 /src/corelib | |
| parent | f549916d18540f3fcf72cc51a09197738bda5c03 (diff) | |
Don't check if Pentium's CPUID leaf 1 exists
It does. When CPUID was introduced in late 486, it already supported
leaf 1. That means all Pentium-class systems (including Intel's new
Quark systems) have CPUID and they have at least leaf 1.
Change-Id: Ib306f8f647014b399b87ffff13f1d5d2530d9ddd
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Diffstat (limited to 'src/corelib')
| -rw-r--r-- | src/corelib/tools/qsimd.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/corelib/tools/qsimd.cpp b/src/corelib/tools/qsimd.cpp index d12143b11c..4459d89e07 100644 --- a/src/corelib/tools/qsimd.cpp +++ b/src/corelib/tools/qsimd.cpp @@ -258,8 +258,12 @@ static inline uint detectProcessorFeatures() uint features = 0; int cpuidLevel = maxBasicCpuidSupported(); +#if Q_PROCESSOR_X86 < 5 if (cpuidLevel < 1) return 0; +#else + Q_ASSERT(cpuidLevel >= 1); +#endif uint cpuid01ECX = 0, cpuid01EDX = 0; cpuidFeatures01(cpuid01ECX, cpuid01EDX); |