runtime/internal/atomic: drop Cas64 pointer indirection in comments

Change-Id: Ieff0065cbd81e045594ce12e10338b0666816d70
GitHub-Last-Rev: d842f5c
GitHub-Pull-Request: #46949
Reviewed-on: https://go-review.googlesource.com/c/go/+/331309
Trust: Keith Randall <[email protected]>
Run-TryBot: Ian Lance Taylor <[email protected]>
TryBot-Result: Go Bot <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>

Author: Mia Zhu

src/runtime/internal/atomic/atomic_amd64.s

@@ -37,7 +37,7 @@ TEXT ·Cas(SB),NOSPLIT,$0-17
 
 // bool	·Cas64(uint64 *val, uint64 old, uint64 new)
 // Atomically:
-//	if(*val == *old){
+//	if(*val == old){
 //		*val = new;
 //		return 1;
 //	} else {

src/runtime/internal/atomic/atomic_arm64.s

@@ -192,7 +192,7 @@ ok:
 
 // bool ·Cas64(uint64 *ptr, uint64 old, uint64 new)
 // Atomically:
-//      if(*val == *old){
+//      if(*val == old){
 //              *val = new;
 //              return 1;
 //      } else {

src/runtime/internal/atomic/atomic_mips64x.s

@@ -37,7 +37,7 @@ cas_fail:
 
 // bool	cas64(uint64 *ptr, uint64 old, uint64 new)
 // Atomically:
-//	if(*val == *old){
+//	if(*val == old){
 //		*val = new;
 //		return 1;
 //	} else {

src/runtime/internal/atomic/atomic_ppc64x.s

@@ -107,7 +107,7 @@ cas_fail:
 
 // bool	·Cas64(uint64 *ptr, uint64 old, uint64 new)
 // Atomically:
-//	if(*val == *old){
+//	if(*val == old){
 //		*val = new;
 //		return 1;
 //	} else {

src/runtime/internal/atomic/atomic_riscv64.s

@@ -30,8 +30,9 @@
 
 #include "textflag.h"
 
+// func Cas(ptr *uint64, old, new uint64) bool
 // Atomically:
-//      if(*val == *old){
+//      if(*val == old){
 //              *val = new;
 //              return 1;
 //      } else {