[turbofan] Support for %_DoubleHi, %_DoubleLo and %_ConstructDouble.

test/cctest/test-disasm-ia32.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 433 matching lines @@
     __ divsd(xmm1, Operand(ebx, ecx, times_4, 10000));
     __ ucomisd(xmm0, xmm1);
     __ cmpltsd(xmm0, xmm1);
 
     __ andpd(xmm0, xmm1);
     __ psllq(xmm0, 17);
     __ psllq(xmm0, xmm1);
     __ psrlq(xmm0, 17);
     __ psrlq(xmm0, xmm1);
     __ por(xmm0, xmm1);
+
+    __ pcmpeqd(xmm1, xmm0);
+
+    __ punpckldq(xmm1, xmm6);
+    __ punpckhdq(xmm7, xmm5);
   }
 
   // cmov.
   {
     __ cmov(overflow, eax, Operand(eax, 0));
     __ cmov(no_overflow, eax, Operand(eax, 1));
     __ cmov(below, eax, Operand(eax, 2));
     __ cmov(above_equal, eax, Operand(eax, 3));
     __ cmov(equal, eax, Operand(ebx, 0));
     __ cmov(not_equal, eax, Operand(ebx, 1));
@@ skipping 118 matching lines @@
 #ifdef OBJECT_PRINT
   OFStream os(stdout);
   code->Print(os);
   byte* begin = code->instruction_start();
   byte* end = begin + code->instruction_size();
   disasm::Disassembler::Disassemble(stdout, begin, end);
 #endif
 }
 
 #undef __