diff options
Diffstat (limited to 'src/corelib/global/qprocessordetection.h')
| -rw-r--r-- | src/corelib/global/qprocessordetection.h | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/src/corelib/global/qprocessordetection.h b/src/corelib/global/qprocessordetection.h index 21f9c8f44f..ca7689c527 100644 --- a/src/corelib/global/qprocessordetection.h +++ b/src/corelib/global/qprocessordetection.h @@ -157,11 +157,33 @@ X86 is little-endian. */ #elif defined(__i386) || defined(__i386__) || defined(_M_IX86) -# define Q_PROCESSOR_X86 # define Q_PROCESSOR_X86_32 # define Q_BYTE_ORDER Q_LITTLE_ENDIAN + +/* + * We define Q_PROCESSOR_X86 == 6 for anything above a equivalent or better + * than a Pentium Pro (the processor whose architecture was called P6) or an + * Athlon. + * + * All processors since the Pentium III and the Athlon 4 have SSE support, so + * we use that to detect. That leaves the original Athlon, Pentium Pro and + * Pentium II. + */ + +# if defined(_M_IX86) +# define Q_PROCESSOR_X86 (_M_IX86/100) +# elif defined(__i686__) || defined(__athlon__) || defined(__SSE__) +# define Q_PROCESSOR_X86 6 +# elif defined(__i586__) || defined(__k6__) +# define Q_PROCESSOR_X86 5 +# elif defined(__i486__) +# define Q_PROCESSOR_X86 4 +# else +# define Q_PROCESSOR_X86 3 +# endif + #elif defined(__x86_64) || defined(__x86_64__) || defined(__amd64) || defined(_M_X64) -# define Q_PROCESSOR_X86 +# define Q_PROCESSOR_X86 6 # define Q_PROCESSOR_X86_64 # define Q_BYTE_ORDER Q_LITTLE_ENDIAN |