MIPS: Emit madd.d for multiply-add on MIPS.

src/mips/assembler-mips.h

Index: src/mips/assembler-mips.h
diff --git a/src/mips/assembler-mips.h b/src/mips/assembler-mips.h
index dd3a065dcac61d53e5aee70a924d476410ca6b3b..1bde0b6edeb477b6905c25942d274b9fd502afbd 100644
--- a/src/mips/assembler-mips.h
+++ b/src/mips/assembler-mips.h
@@ -805,6 +805,7 @@ class Assembler : public AssemblerBase {
   void add_d(FPURegister fd, FPURegister fs, FPURegister ft);
   void sub_d(FPURegister fd, FPURegister fs, FPURegister ft);
   void mul_d(FPURegister fd, FPURegister fs, FPURegister ft);
+  void madd_d(FPURegister fd, FPURegister fr, FPURegister fs, FPURegister ft);
   void div_d(FPURegister fd, FPURegister fs, FPURegister ft);
   void abs_d(FPURegister fd, FPURegister fs);
   void mov_d(FPURegister fd, FPURegister fs);
@@ -1146,6 +1147,13 @@ class Assembler : public AssemblerBase {
                         SecondaryField func = NULLSF);
 
   void GenInstrRegister(Opcode opcode,
+                        FPURegister fr,
+                        FPURegister ft,
+                        FPURegister fs,
+                        FPURegister fd,
+                        SecondaryField func = NULLSF);
+
+  void GenInstrRegister(Opcode opcode,
                         SecondaryField fmt,
                         Register rt,
                         FPURegister fs,