-#define XGATE_OP_INH ""
-#define XGATE_OP_TRI "r,r,r"
-#define XGATE_OP_DYA "r,r"
-#define XGATE_OP_IMM16 "r,if"
-#define XGATE_OP_IMM8 "r,i8"
-#define XGATE_OP_IMM4 "r,i4"
-#define XGATE_OP_IMM3 "i3"
-#define XGATE_OP_MON "r"
-#define XGATE_OP_MON_R_C "r,c"
-#define XGATE_OP_MON_C_R "c,r"
-#define XGATE_OP_MON_R_P "r,p"
-#define XGATE_OP_IDR "r,r,+"
-#define XGATE_OP_IDO5 "r,r,i5"
-#define XGATE_OP_REL9 "b9"
-#define XGATE_OP_REL10 "ba"
-#define XGATE_OP_DYA_MON "=r"
+#define XGATE_OP_INH "" /* Inherent. */
+#define XGATE_OP_TRI "r,r,r" /* Register followed by two registers. */
+#define XGATE_OP_DYA "r,r" /* Register followed by a register. */
+#define XGATE_OP_IMM16 "r,if" /* Register followed by 16-bit value. */
+#define XGATE_OP_IMM8 "r,i8" /* Register followed by 8-bit value. */
+#define XGATE_OP_IMM4 "r,i4" /* Register followed by 4-bit value. */
+#define XGATE_OP_IMM3 "i3" /* Register followed by 3-bit value. */
+#define XGATE_OP_MON "r" /* Single register. */
+#define XGATE_OP_MON_R_C "r,c" /* General register followed by ccr register. */
+#define XGATE_OP_MON_C_R "c,r" /* CCR register followed by a general register. */
+#define XGATE_OP_MON_R_P "r,p" /* General register followed by pc register. */
+#define XGATE_OP_IDR "r,r,+" /* Three registers with the third having a -/+ directive. */
+#define XGATE_OP_IDO5 "r,r,i5" /* Two general registers followed by an immediate value. */
+#define XGATE_OP_REL9 "b9" /* 9-bit value that is relative to the current pc. */
+#define XGATE_OP_REL10 "ba" /* 10-bit value that is relative to the current pc. */
+#define XGATE_OP_DYA_MON "=r"