Added BLT unit test

tests/blt.s

@@ -0,0 +1,31 @@
+.global _start
+_start:
+    # Set base value of a0 to 'test failed'
+    addi a0, zero, 1
+
+    # Set A, B values of t0/t1, to test less than
+    addi t0, zero, 1
+    addi t1, zero, 2
+    blt t1, t0, lt0
+
+    # Inequality passed, now test with jump
+    blt t0, t1, lt1
+
+    # On failure, return
+    ebreak
+
+ltNeg:
+    # All passed
+    addi a0, zero, 0
+    ebreak
+
+lt0:
+    # Inequality failed
+    ebreak
+
+lt1:
+    # Inequality passed ; now try with negative numbers
+    addi t0, zero, -1
+    addi t1, zero, -2
+    blt t1, t0, ltNeg
+    ebreak

tests/test.sh

@@ -25,6 +25,7 @@ test() {
 test "ADDI : Add Immediate          " "../build/tests/addi " 186
 test "MV   : Move registers         " "../build/tests/mv   " 186
 test "BEQ  : Branch EQual           " "../build/tests/beq  " 0
+test "BLT  : Branch Less Than       " "../build/tests/blt  " 0
 test "JAL  : Jump And Link          " "../build/tests/jal  " 0
 test "SWLW : Store Word Load Word   " "../build/tests/swlw " 0
 test "JALR : Jump And Link Register " "../build/tests/jalr " 0