Added a function for memory size alignment

tests/programs/align.q

@@ -0,0 +1,26 @@
+import math
+
+main() {
+	assert math.align2(0) == 0
+	assert math.align2(1) == 1
+	assert math.align2(2) == 2
+	assert math.align2(3) == 4
+	assert math.align2(4) == 4
+	assert math.align2(5) == 8
+	assert math.align2(6) == 8
+	assert math.align2(7) == 8
+	assert math.align2(8) == 8
+	assert math.align2(9) == 16
+	assert math.align2(10) == 16
+	assert math.align2(30) == 32
+	assert math.align2(60) == 64
+	assert math.align2(100) == 128
+	assert math.align2(200) == 256
+	assert math.align2(500) == 512
+	assert math.align2(1000) == 1024
+	assert math.align2(2000) == 2048
+	assert math.align2(4000) == 4096
+	assert math.align2(8000) == 8192
+	assert math.align2(16000) == 16384
+	assert math.align2(32000) == 32768
+}

tests/programs_test.go

@@ -40,6 +40,7 @@ var programs = []struct {
 	{"bitwise-or", 0},
 	{"bitwise-xor", 0},
 	{"shift", 0},
+	{"align", 0},
 	{"modulo", 0},
 	{"modulo-assign", 0},
 	{"div-split", 0},