Rust character drawing

bench/tests/op/bltu.s

@@ -1,15 +1,47 @@
-# expected: 000001BC, 000002BC
+# expected: 0000000000000001, 0000000000000004, 0000000000000008, 000000000000000D, 0000000000000014
     .text
 _start:
-    add x1, x0, 28
-    add x2, x0, 28
-    bltu x1, x2, finish # Should not jump
-    add x31, x0, 0x1BC
+    # Test 1: Equal values (should NOT branch)
+    li x1, 5
+    li x2, 5
+    bltu x1, x2, label1
+    addi x31, x0, 1         # expected path (not taken)
+label1:
+    
+    # Test 2: x1 < x2 unsigned (should branch)
+    li x1, 5
+    li x2, 10
+    bltu x1, x2, label2
+    addi x31, x31, 2         # skipped if branch taken
+    j label2_end
+label2:
+    addi x31, x31, 3         # expected path (branch taken)
+label2_end:
 
-    add x1, x0, 12
-    add x2, x0, 24
-    bltu x1, x2, finish # Should jump to finish 
-    add x31, x0, 0x3BC
+    # Test 3: x1 > x2 unsigned (should NOT branch)
+    li x1, 10
+    li x2, 5
+    bltu x1, x2, label3
+    addi x31, x31, 4         # expected path (not taken)
+label3:
+
+    # Test 4: x1 = 0xFFFFFFFFFFFFFFFF, x2 = 0 (max unsigned vs min unsigned)
+    li x1, -1                # 0xFFFFFFFFFFFFFFFF
+    li x2, 0
+    bltu x1, x2, label4
+    addi x31, x31, 5         # expected path (not taken)
+label4:
+
+    # Test 5: x1 = 0, x2 = 0xFFFFFFFFFFFFFFFF (min unsigned vs max unsigned)
+    li x1, 0
+    li x2, -1
+    bltu x1, x2, label5
+    addi x31, x31, 6         # skipped if branch taken
+    j label5_end
+label5:
+    addi x31, x31, 7         # expected path (branch taken)
+label5_end:
+
+    # Done
+    nop
 
-finish: 
-    add x31, x0, 0x2BC