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

src/mips/builtins-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_MIPS
 
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 162 matching lines @@
     // Load the double value of the parameter into f2, maybe converting the
     // parameter to a number first using the ToNumberStub if necessary.
     Label convert, convert_smi, convert_number, done_convert;
     __ bind(&convert);
     __ JumpIfSmi(a2, &convert_smi);
     __ lw(t0, FieldMemOperand(a2, HeapObject::kMapOffset));
     __ JumpIfRoot(t0, Heap::kHeapNumberMapRootIndex, &convert_number);
     {
       // 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());
       __ CallStub(&stub);
       __ mov(a2, v0);
       __ Pop(a0, a1, a3);
       {
         // Restore the double accumulator value (f0).
         Label restore_smi, done_restore;
         __ JumpIfSmi(a1, &restore_smi);
         __ ldc1(f0, FieldMemOperand(a1, HeapNumber::kValueOffset));
         __ jmp(&done_restore);
         __ bind(&restore_smi);
         __ SmiToDoubleFPURegister(a1, f0, t0);
         __ bind(&done_restore);
       }
+      __ SmiUntag(a3);
+      __ SmiUntag(a0);
     }
     __ jmp(&convert);
     __ bind(&convert_number);
     __ ldc1(f2, FieldMemOperand(a2, HeapNumber::kValueOffset));
     __ jmp(&done_convert);
     __ bind(&convert_smi);
     __ SmiToDoubleFPURegister(a2, f2, t0);
     __ bind(&done_convert);
 
     // Perform the actual comparison with using Min/Max macro instructions the
@@ skipping 2388 matching lines @@
   }
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS