Detect AltiVec support on OpenBSD

simd/jsimd_powerpc.c

@@ -31,6 +31,12 @@
 #include <string.h>
 #include <ctype.h>
 
+#if defined(__OpenBSD__)
+#include <sys/param.h>
+#include <sys/sysctl.h>
+#include <machine/cpu.h>
+#endif
+
 static unsigned int simd_support = ~0;
 
 #if defined(__linux__) || defined(ANDROID) || defined(__ANDROID__)
@@ -126,6 +132,12 @@ init_simd (void)
   IExec->GetCPUInfoTags(GCIT_VectorUnit, &altivec, TAG_DONE);
   if(altivec == VECTORTYPE_ALTIVEC)
     simd_support |= JSIMD_ALTIVEC;
+#elif defined(__OpenBSD__)
+  int mib[2] = { CTL_MACHDEP, CPU_ALTIVEC };
+  int altivec;
+  size_t len = sizeof(altivec);
+  if (sysctl(mib, 2, &altivec, &len, NULL, 0) == 0 && altivec != 0)
+    simd_support |= JSIMD_ALTIVEC;
 #endif
 
   /* Force different settings through environment variables */