int has_altivec(void) { #ifdef __AMIGAOS4__ ULONG result = 0; extern struct ExecIFace *IExec; IExec->GetCPUInfoTags(GCIT_VectorUnit, &result, TAG_DONE); if (result == VECTORTYPE_ALTIVEC) return 1; #elif __APPLE__ int sels[2] = {CTL_HW, HW_VECTORUNIT}; int has_vu = 0; size_t len = sizeof(has_vu); int err; err = sysctl(sels, 2, &has_vu, &len, NULL, 0); if (err == 0) return (has_vu != 0); #else // since we were compiled for altivec, just assume we have it // until someone comes up with a proper way (not involving signal hacks). #endif /* __AMIGAOS4__ */ }