ARM64: Fixes and more support for FRINT<X> instructions.

src/arm64/macro-assembler-arm64-inl.h

Index: src/arm64/macro-assembler-arm64-inl.h
diff --git a/src/arm64/macro-assembler-arm64-inl.h b/src/arm64/macro-assembler-arm64-inl.h
index 06bcd112af7a93d8d2163d836575cfb409553c4d..ea3aaff7312463dced6ddb8cfbbc4e9f00a86a43 100644
--- a/src/arm64/macro-assembler-arm64-inl.h
+++ b/src/arm64/macro-assembler-arm64-inl.h
@@ -833,6 +833,12 @@ void MacroAssembler::Frinta(const FPRegister& fd, const FPRegister& fn) {
 }
 
 
+void MacroAssembler::Frintm(const FPRegister& fd, const FPRegister& fn) {
+  ASSERT(allow_macro_instructions_);
+  frintm(fd, fn);
+}
+
+
 void MacroAssembler::Frintn(const FPRegister& fd, const FPRegister& fn) {
   ASSERT(allow_macro_instructions_);
   frintn(fd, fn);