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#elif defined( __powerpc__ ) || defined( __ppc__ ) || defined( __powerpc64__ ) \
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int selectors[2] = { CTL_HW, HW_VECTORUNIT };
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size_t i_length = sizeof( i_has_altivec );
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int i_error = sysctl( selectors, 2, &i_has_altivec, &i_length, NULL, 0);