all: make function comments match function names

Change-Id: I279c95d1d1e5f07e0c7a0c4416bf3613d85bb950
Reviewed-on: https://go-review.googlesource.com/c/arch/+/639476
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

Author: cuishuang

arm64/arm64asm/ext_test.go

@@ -268,7 +268,7 @@ func disasm(syntax string, src []byte) (inst Inst, text string) {
 	return
 }
 
-// decodecoverage returns a floating point number denoting the
+// decodeCoverage returns a floating point number denoting the
 // decoder coverage.
 func decodeCoverage() float64 {
 	n := 0

loong64/loong64asm/ext_test.go

@@ -240,7 +240,7 @@ func disasm(syntax string, src []byte) (inst Inst, text string) {
 	return
 }
 
-// decodecoverage returns a floating point number denoting the
+// decodeCoverage returns a floating point number denoting the
 // decoder coverage.
 func decodeCoverage() float64 {
 	n := 0

riscv64/riscv64asm/ext_test.go

@@ -242,7 +242,7 @@ func disasm(syntax string, src []byte) (inst Inst, text string) {
 	return
 }
 
-// decodecoverage returns a floating point number denoting the
+// decodeCoverage returns a floating point number denoting the
 // decoder coverage.
 func decodeCoverage() float64 {
 	n := 0