Improves test for jumps

bench/tests/op/jal.s

@@ -1,17 +1,28 @@
-# expected: 00000004, 0000008, 00000014, 0000000B
+# expected: 000002BC, 000004BC, 000007BC, 000005BC
     .text
 _start:
-    jal x31, step1
-step1:
-    jal x31, step2
-step4:
-    addi x31, x0, 0x00B
-    jal x0, finish
-step2:
-    jal x31, step3
-step3:
-    jal x0, step4
-    addi x31, x0, 0x00A # This instruction should never be executed
-finish:
-    nop
+    # forward jal -> should jump to target and set x1 to return addr
+    jal x1, jal_target
+    add x31, x0, 0x1BC
+jal_target:
+    add x31, x0, 0x2BC
+
+    add x5, x0, 0x1
+    jal x2, jal_back_target
+    add x31, x0, 0x3BC
+jal_back_target:
+    add x31, x0, 0x4BC
+    jal x0, after_jal_back
+jal_back_flag:
+    add x31, x0, 0x5BC
+after_jal_back:
+
+    # same-target jal to next insn (offset small) -> should set x3 and continue
+    jal x3, same_jal_target
+    add x31, x0, 0x6BC
+same_jal_target:
+    add x31, x0, 0x7BC
+
+    # final marker
+    add x31, x0, 0x5BC