$ m4 cas.m4 > cas.gen.ad
$ sed '8930,9404!d' aarch64.ad > res.ad
$ diff -uN cas.gen.ad res.ad | cat -A

--- cas.gen.ad^I2023-02-20 04:18:46.624289978 +0000$
+++ res.ad^I2023-02-20 04:19:08.780351888 +0000$
@@ -15,7 +15,7 @@$
 // This pattern is generated automatically from cas.m4.$
 // DO NOT EDIT ANYTHING IN THIS SECTION OF THE FILE$
 instruct compareAndExchangeB(iRegINoSp res, indirect mem, iRegI oldval, iRegI newval, rFlagsReg cr) %{$
- $
+$
   match(Set res (CompareAndExchangeB mem (Binary oldval newval)));$
   ins_cost(2 * VOLATILE_REF_COST);$
   effect(TEMP_DEF res, KILL cr);$
@@ -34,7 +34,7 @@$
 // This pattern is generated automatically from cas.m4.$
 // DO NOT EDIT ANYTHING IN THIS SECTION OF THE FILE$
 instruct compareAndExchangeS(iRegINoSp res, indirect mem, iRegI oldval, iRegI newval, rFlagsReg cr) %{$
- $
+$
   match(Set res (CompareAndExchangeS mem (Binary oldval newval)));$
   ins_cost(2 * VOLATILE_REF_COST);$
   effect(TEMP_DEF res, KILL cr);$
@@ -53,7 +53,7 @@$
 // This pattern is generated automatically from cas.m4.$
 // DO NOT EDIT ANYTHING IN THIS SECTION OF THE FILE$
 instruct compareAndExchangeI(iRegINoSp res, indirect mem, iRegI oldval, iRegI newval, rFlagsReg cr) %{$
- $
+$
   match(Set res (CompareAndExchangeI mem (Binary oldval newval)));$
   ins_cost(2 * VOLATILE_REF_COST);$
   effect(TEMP_DEF res, KILL cr);$
...