samples: add Terra samples

source: https://github.com/zdevito/terra/tree/master/tests

samples/Terra/expvec.t

@@ -0,0 +1,34 @@
+
+if require("ffi").os == "Windows" then
+	print("Not consistent on windows")
+	return
+end
+local C = terralib.includecstring[[
+	#include <immintrin.h>
+	void dostuff(__m128 what) {}
+	void dostuff2() { __m128 a; dostuff(a); }
+]]
+
+local V = 1
+local exp = terralib.intrinsic(("llvm.exp.v%df32"):format(V),vector(float,V) -> vector(float,V))
+
+terra foo(N : int)
+	
+	var d = vector(0.f,1.f,3.f,4.f)
+
+	C.dostuff(d)
+
+	--var v = vector(0.f,1.f,2.f,3.f,4.f,5.f,6.f,7.f)
+	var v = vector(0.f)
+	for i = 0, N do
+		v = exp(v)
+	end
+	return v[0],v[1],v[2],v[3]
+end
+
+C.dostuff:printpretty()
+
+local begin = terralib.currenttimeinseconds()
+print(foo(100000000))
+local endd = terralib.currenttimeinseconds()
+print(endd - begin)