Faster 64-bit right-shift for the ia32 compiler.

runtime/vm/assembler_ia32.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_IA32)
 
 #include "vm/assembler.h"
 #include "vm/heap.h"
 #include "vm/memory_region.h"
@@ skipping 1202 matching lines @@
   EmitOperand(1, address);
 }
 
 
 void Assembler::shll(Register reg, const Immediate& imm) {
   EmitGenericShift(4, reg, imm);
 }
 
 
 void Assembler::shll(Register operand, Register shifter) {
-  EmitGenericShift(4, operand, shifter);
+  EmitGenericShift(4, Operand(operand), shifter);
 }
 
 
 void Assembler::shrl(Register reg, const Immediate& imm) {
   EmitGenericShift(5, reg, imm);
 }
 
 
 void Assembler::shrl(Register operand, Register shifter) {
-  EmitGenericShift(5, operand, shifter);
+  EmitGenericShift(5, Operand(operand), shifter);
 }
 
 
 void Assembler::sarl(Register reg, const Immediate& imm) {
   EmitGenericShift(7, reg, imm);
 }
 
 
 void Assembler::sarl(Register operand, Register shifter) {
-  EmitGenericShift(7, operand, shifter);
+  EmitGenericShift(7, Operand(operand), shifter);
+}
+
+
+void Assembler::sarl(const Address& address, Register shifter) {
+  EmitGenericShift(7, Operand(address), shifter);
 }
 
 
 void Assembler::shld(Register dst, Register src) {
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   EmitUint8(0x0F);
   EmitUint8(0xA5);
   EmitRegisterOperand(src, dst);
 }
 
 
+void Assembler::shrd(Register dst, Register src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0xAD);
+  EmitRegisterOperand(src, dst);
+}
+
+
+void Assembler::shrd(const Address& dst, Register src) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0xAD);
+  EmitOperand(src, Operand(dst));
+}
+
+
 void Assembler::negl(Register reg) {
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   EmitUint8(0xF7);
   EmitOperand(3, Operand(reg));
 }
 
 
 void Assembler::notl(Register reg) {
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   EmitUint8(0xF7);
@@ skipping 634 matching lines @@
     EmitOperand(rm, Operand(reg));
   } else {
     EmitUint8(0xC1);
     EmitOperand(rm, Operand(reg));
     EmitUint8(imm.value() & 0xFF);
   }
 }
 
 
 void Assembler::EmitGenericShift(int rm,
-                                 Register operand,
+                                 const Operand& operand,
                                  Register shifter) {
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   ASSERT(shifter == ECX);
   EmitUint8(0xD3);
   EmitOperand(rm, Operand(operand));
 }
 
 
 void Assembler::LoadClassId(Register result, Register object) {
   ASSERT(RawObject::kClassIdTagBit == 16);
@@ skipping 81 matching lines @@
 
 const char* Assembler::XmmRegisterName(XmmRegister reg) {
   ASSERT((0 <= reg) && (reg < kNumberOfXmmRegisters));
   return xmm_reg_names[reg];
 }
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_IA32