fix imul(reg, op, imm) emission on x64

test/cctest/test-disasm-x64.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 166 matching lines @@
   __ decq(rdx);
   __ cdq();
 
   __ nop();
   __ idivq(rdx);
   __ mul(rdx);
   __ negq(rdx);
   __ notq(rdx);
   __ testq(Operand(rbx, rcx, times_4, 10000), rdx);
 
-  __ imulq(rdx, Operand(rbx, rcx, times_4, 10000));
   __ imulq(rdx, rcx, Immediate(12));
   __ imulq(rdx, rcx, Immediate(1000));
+  __ imulq(rdx, Operand(rbx, rcx, times_4, 10000));
+  __ imulq(rdx, Operand(rbx, rcx, times_4, 10000), Immediate(12));
   __ imulq(rdx, Operand(rbx, rcx, times_4, 10000), Immediate(1000));
+  __ imull(r15, rcx, Immediate(12));
+  __ imull(r15, rcx, Immediate(1000));
+  __ imull(r15, Operand(rbx, rcx, times_4, 10000));
+  __ imull(r15, Operand(rbx, rcx, times_4, 10000), Immediate(12));
+  __ imull(r15, Operand(rbx, rcx, times_4, 10000), Immediate(1000));
 
   __ incq(rdx);
   __ incq(Operand(rbx, rcx, times_4, 10000));
   __ pushq(Operand(rbx, rcx, times_4, 10000));
   __ popq(Operand(rbx, rcx, times_4, 10000));
   // TODO(mstarzinger): The following is protected.
   // __ jmp(Operand(rbx, rcx, times_4, 10000));
 
   __ leaq(rdx, Operand(rbx, rcx, times_4, 10000));
   __ orq(rdx, Immediate(12345));
@@ skipping 266 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 __