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Define Q_PROCESSOR_X86 to the x86 family

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They are:
 3      Intel 80386 or equivalent
 4      Intel 80486 or equivalent
 5      Intel Pentium, Pentium MMX, AMD K6 and a few others
 6      everything since the Intel Pentium Pro and AMD Athlon

By necessity, this means all 64-bit builds have a family of 6. That
matches the family number that the CPUID instruction produces.

Change-Id: I5dc7344976f8da65938f44310b89ade4fe3f1a28
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This commit is contained in:
Thiago Macieira 2013-08-06 13:40:45 -07:00 committed by The Qt Project
parent c374f4441a
commit 065cff8311
1 changed files with 24 additions and 2 deletions
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26
src/corelib/global/qprocessordetection.h
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@ -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