Create 2_bit_adder.lgc

Author: Derp McDerpson

tests/2_bit_adder.lgc

@@ -0,0 +1,10 @@
+# XOR gate
+circ xor(a,b)->(!(a&b))&(a|b)
+# half-adder
+circ ha(a,b)->(a&b)+(xor(a,b))
+# full-adder
+circ fa(a,b,c)->(ha(a,b)[h])|(ha(ha(a,b)[t],c)[h])+(ha(ha(a,b)[t],c)[t])
+# 2-digit binary adder, accepts two two-bits
+circ two_digits(a,b)->(fa(a[h],b[h],(ha(a[t],b[t])[h]))[h])+(fa(a[h],b[h],(ha(a[t],b[t])[h]))[t])+(ha(a[t],b[t])[t])
+# Adds together 10 and 11, should return 101
+out two_digits(10,11)