Add tests for stage 7

bench/tests/op/add.s

@@ -0,0 +1,16 @@
+# expected: dead0000, dead0001, 00000000
+    .text
+_start:
+    lui x2, 0xdead0
+    lui x3, 0x0
+    lui x4, 0x1
+    addi x5, x0, (-1)
+
+    # Add 0
+    add x31, x2, x3
+
+    # Basic addition
+    add x31, x2, x4
+
+    # Overflow
+    add x31, x5, x4

bench/tests/op/and.s

@@ -0,0 +1,11 @@
+# expected: 00000000, 00000010
+    .text
+_start:
+    addi x1, x0, 0x100
+    addi x2, x0, 0x0FF
+    and x31, x1, x2
+
+    addi x1, x0, -1
+    addi x2, x0, 0x010
+    and x31, x1, x2
+

bench/tests/op/or.s

@@ -0,0 +1,11 @@
+# expected: 000001FF, FFFFFFFF
+    .text
+_start:
+    addi x1, x0, 0x100
+    addi x2, x0, 0x0FF
+    or x31, x1, x2
+
+    addi x1, x0, -1
+    addi x2, x0, 0x010
+    or x31, x1, x2
+

bench/tests/op/sll.s

@@ -0,0 +1,13 @@
+# expected: 000003FC, 80000000, 00000000
+    .text
+_start:
+    addi x1, x0, 0x0FF
+    addi x2, x0, 2
+    sll x31, x1, x2
+
+    addi x1, x0, 0x001
+    addi x2, x0, 31
+    sll x31, x1, x2
+
+    addi x1, x0, 0x0F0
+    sll x31, x1, x2

bench/tests/op/slt.s

@@ -0,0 +1,19 @@
+# expected: 00000000, 00000001, 00000001, 00000000
+    .text
+_start:
+    addi x1, x0, (-1)
+    addi x2, x0, (-37)
+    slt x31, x1, x2
+
+    addi x1, x0, (-37)
+    addi x2, x0, (-1)
+    slt x31, x1, x2
+
+    addi x1, x0, (-38)
+    addi x2, x0, (-38)
+    slt x31, x1, x2
+
+    addi x1, x0, 129
+    addi x2, x0, (-7)
+    slt x31, x1, x2
+

bench/tests/op/sltu.s

@@ -0,0 +1,14 @@
+# expected: 00000001, 00000001, 00000000
+    .text
+_start:
+    addi x1, x0, 0
+    addi x2, x0, (-1)
+    sltu x31, x1, x2
+
+    addi x1, x0, 98
+    addi x2, x0, 99
+    sltu x31, x1, x2
+
+    addi x1, x0, 99
+    addi x2, x0, 98
+    sltu x31, x1, x2

bench/tests/op/sra.s

@@ -0,0 +1,14 @@
+# expected: 000000FF, FFFFFFFF, 00000000
+    .text
+_start:
+    addi x1, x0, 0x3FC
+    addi x2, x0, 2
+    sra x31, x1, x2
+
+    lui x1, 0xA0000
+    addi x2, x0, 31
+    sra x31, x1, x2
+
+    lui x1, 0x0A000
+    addi x2, x0, 31
+    sra x31, x1, x2

bench/tests/op/srl.s

@@ -0,0 +1,14 @@
+# expected: 000000FF, 00000001, 00000000
+    .text
+_start:
+    addi x1, x0, 0x3FC
+    addi x2, x0, 2
+    srl x31, x1, x2
+
+    lui x1, 0xA0000
+    addi x2, x0, 31
+    srl x31, x1, x2
+
+    lui x1, 0x0A000
+    addi x2, x0, 31
+    srl x31, x1, x2

bench/tests/op/xor.s

@@ -0,0 +1,16 @@
+# expected: 00000000, 000001EF
+    .text
+_start:
+    # 1 XOR 1 should equal 0000000
+    addi x1, x0, -1
+    addi x2, x0, -1
+    xor x31, x1, x2
+
+    addi x1, x0, 0x1BC
+    addi x2, x0, 0x1EF
+
+    addi x3, x0, 0x1BC
+
+    # Xor is involutive and commutative, applying it twice should give us the original operand
+    xor x1, x1, x2
+    xor x31, x1, x3