[dev.cc] cm/asm: fix up arm after cross-check with 5a

As with the previous round for ppc64, this CL fixes a couple of things
that 5a supported but asm did not, both simple.

1) Allow condition code on MRC instruction; this was marked as a TODO.
2) Allow R(n) notation in ARM register shifts.  The code needs a rethink
but the tests we're leading toward will make the rewrite easier to test and
trust.

Change-Id: I5b52ad25d177a74cf07e089dddfeeab21863c424
Reviewed-on: https://go-review.googlesource.com/5422
Reviewed-by: Russ Cox <rsc@golang.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/src/cmd/asm/internal/arch/arm.go b/src/cmd/asm/internal/arch/arm.go
index 75bb0be168..fab896a79f 100644
--- a/src/cmd/asm/internal/arch/arm.go
+++ b/src/cmd/asm/internal/arch/arm.go
@@ -150,7 +150,7 @@ func ARMConditionCodes(prog *obj.Prog, cond string) bool {
 	if cond == "" {
 		return true
 	}
-	bits, ok := parseARMCondition(cond)
+	bits, ok := ParseARMCondition(cond)
 	if !ok {
 		return false
 	}
@@ -163,10 +163,10 @@ func ARMConditionCodes(prog *obj.Prog, cond string) bool {
 	return true
 }
 
-// parseARMCondition parses the conditions attached to an ARM instruction.
+// ParseARMCondition parses the conditions attached to an ARM instruction.
 // The input is a single string consisting of period-separated condition
 // codes, such as ".P.W". An initial period is ignored.
-func parseARMCondition(cond string) (uint8, bool) {
+func ParseARMCondition(cond string) (uint8, bool) {
 	if strings.HasPrefix(cond, ".") {
 		cond = cond[1:]
 	}