MIPS: Fix 'MIPS: Support r6 max, min floating point instructions.'

src/mips/builtins-mips.cc

Index: src/mips/builtins-mips.cc
diff --git a/src/mips/builtins-mips.cc b/src/mips/builtins-mips.cc
index ab1818007217b96299346a56858e5e6c21341b9c..9693a52697aa5878ecb000930f5fe6122bba6c39 100644
--- a/src/mips/builtins-mips.cc
+++ b/src/mips/builtins-mips.cc
@@ -180,6 +180,8 @@ void Builtins::Generate_MathMaxMin(MacroAssembler* masm, MathMaxMinKind kind) {
     {
       // Parameter is not a Number, use the ToNumberStub to convert it.
       FrameScope scope(masm, StackFrame::INTERNAL);
+      __ SmiTag(a0);
+      __ SmiTag(a3);
       __ Push(a0, a1, a3);
       __ mov(a0, a2);
       ToNumberStub stub(masm->isolate());
@@ -196,6 +198,8 @@ void Builtins::Generate_MathMaxMin(MacroAssembler* masm, MathMaxMinKind kind) {
         __ SmiToDoubleFPURegister(a1, f0, t0);
         __ bind(&done_restore);
       }
+      __ SmiUntag(a3);
+      __ SmiUntag(a0);
     }
     __ jmp(&convert);
     __ bind(&convert_number);