Revision 2e03286b exec-all.h

b/exec-all.h
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#define tostring(s)	#s
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#endif
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#ifndef likely
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#if __GNUC__ < 3
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#define __builtin_expect(x, n) (x)
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#endif
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#define likely(x)   __builtin_expect(!!(x), 1)
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#define unlikely(x)   __builtin_expect(!!(x), 0)
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#endif
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#ifdef __i386__
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#define REGPARM(n) __attribute((regparm(n)))

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