[arm] Add support for SMMLA, SMMLS and SMMUL.

src/arm/assembler-arm.h

Index: src/arm/assembler-arm.h
diff --git a/src/arm/assembler-arm.h b/src/arm/assembler-arm.h
index e0c3a97ba920e095b49b88bc0dfcb33c5c928b34..a87873d84650408b8e749ca9a497386b0b81c0bc 100644
--- a/src/arm/assembler-arm.h
+++ b/src/arm/assembler-arm.h
@@ -975,6 +975,14 @@ class Assembler : public AssemblerBase {
   void mul(Register dst, Register src1, Register src2,
            SBit s = LeaveCC, Condition cond = al);
 
+  void smmla(Register dst, Register src1, Register src2, Register srcA,
+             Condition cond = al);
+
+  void smmls(Register dst, Register src1, Register src2, Register srcA,
+             Condition cond = al);
+
+  void smmul(Register dst, Register src1, Register src2, Condition cond = al);
+
   void smlal(Register dstL, Register dstH, Register src1, Register src2,
              SBit s = LeaveCC, Condition cond = al);