MIPS: port Prevent deopt on double value assignment to typed arrays

src/mips/stub-cache-mips.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3916 matching lines @@
       if (array_type == kExternalFloatArray) {
         __ cvt_s_d(f0, f0);
         __ sll(t8, t0, 2);
         __ addu(t8, a3, t8);
         __ swc1(f0, MemOperand(t8, 0));
       } else if (array_type == kExternalDoubleArray) {
         __ sll(t8, t0, 3);
         __ addu(t8, a3, t8);
         __ sdc1(f0, MemOperand(t8, 0));
       } else {
-        Label done;
+        __ EmitECMATruncate(t3, f0, f2, t2, t1, t5);
 
-        // Need to perform float-to-int conversion.
-        // Test whether exponent equal to 0x7FF (infinity or NaN).
-
-        __ mfc1(t3, f1);  // Move exponent word of double to t3 (as raw bits).
-        __ li(t1, Operand(0x7FF00000));
-        __ And(t3, t3, Operand(t1));
-        __ Branch(USE_DELAY_SLOT, &done, eq, t3, Operand(t1));
-        __ mov(t3, zero_reg);  // In delay slot.
-
-        // Not infinity or NaN simply convert to int.
-        if (IsElementTypeSigned(array_type)) {
-          __ trunc_w_d(f0, f0);
-          __ mfc1(t3, f0);
-        } else {
-          __ Trunc_uw_d(f0, t3);
-        }
-
-        // t3: HeapNumber converted to integer
-        __ bind(&done);
         switch (array_type) {
           case kExternalByteArray:
           case kExternalUnsignedByteArray:
             __ addu(t8, a3, t0);
             __ sb(t3, MemOperand(t8, 0));
             break;
           case kExternalShortArray:
           case kExternalUnsignedShortArray:
             __ sll(t8, t0, 1);
             __ addu(t8, a3, t8);
@@ skipping 308 matching lines @@
       masm->isolate()->builtins()->KeyedStoreIC_MissForceGeneric();
   __ Jump(ic, RelocInfo::CODE_TARGET);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS