Fixed some soft-float bugs for MIPS and ARM.

src/mips/lithium-codegen-mips.cc

 // Copyright 2012 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 4635 matching lines @@
                                               scratch0(), f2);
     }
   } else {
     if (CpuFeatures::IsSupported(FPU)) {
       CpuFeatureScope scope(masm(), FPU);
       __ mtc1(src, dbl_scratch);
       __ Cvt_d_uw(dbl_scratch, dbl_scratch, f22);
     } else {
       Label no_leading_zero, done;
       __ And(at, src, Operand(0x80000000));
-      __ Branch(&no_leading_zero, ne, at, Operand(zero_reg));
-
+      __ Branch(USE_DELAY_SLOT, &no_leading_zero, ne, at, Operand(zero_reg));
+      __ mov(sfpd_hi, src);
       // Integer has one leading zeros.
       GenerateUInt2Double(masm(), sfpd_hi, sfpd_lo, t0, 1);
       __ Branch(&done);
 
       __ bind(&no_leading_zero);
       GenerateUInt2Double(masm(), sfpd_hi, sfpd_lo, t0, 0);
-      __ Branch(&done);
+      __ bind(&done);
     }
   }
 
   if (FLAG_inline_new) {
     __ LoadRoot(scratch0(), Heap::kHeapNumberMapRootIndex);
     __ AllocateHeapNumber(t1, a3, t0, scratch0(), &slow, DONT_TAG_RESULT);
     __ Move(dst, t1);
     __ Branch(&done);
   }
 
@@ skipping 1433 matching lines @@
   __ Subu(scratch, result, scratch);
   __ lw(result, FieldMemOperand(scratch,
                                 FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal