1227   InstructionMark im(this);

  1227   InstructionMark im(this);

  1228   assert(!dst.base_needs_rex() && !dst.index_needs_rex(), "no extended registers");

  1228   assert(!dst.base_needs_rex() && !dst.index_needs_rex(), "no extended registers");

  1229   emit_byte(0x66);

  1229   emit_byte(0x66);

  1230   emit_byte(0x81);

  1230   emit_byte(0x81);

  1231   emit_operand(rdi, dst, 2);

  1231   emit_operand(rdi, dst, 2);

  1233 }

  1233 }

  1234 

  1234 

  1235 // The 32-bit cmpxchg compares the value at adr with the contents of rax,

  1235 // The 32-bit cmpxchg compares the value at adr with the contents of rax,

  1236 // and stores reg into adr if so; otherwise, the value at adr is loaded into rax,.

  1236 // and stores reg into adr if so; otherwise, the value at adr is loaded into rax,.

  1237 // The ZF is set if the compared values were equal, and cleared otherwise.

  1237 // The ZF is set if the compared values were equal, and cleared otherwise.

  1877 

  1877 

  1878   emit_byte(0x66); // switch to 16-bit mode

  1878   emit_byte(0x66); // switch to 16-bit mode

  1879   prefix(dst);

  1879   prefix(dst);

  1880   emit_byte(0xC7);

  1880   emit_byte(0xC7);

  1881   emit_operand(rax, dst, 2);

  1881   emit_operand(rax, dst, 2);

  1883 }

  1883 }

  1884 

  1884 

  1885 void Assembler::movw(Register dst, Address src) {

  1885 void Assembler::movw(Register dst, Address src) {

  1886   InstructionMark im(this);

  1886   InstructionMark im(this);

  1887   emit_byte(0x66);

  1887   emit_byte(0x66);

  2569 void Assembler::ret(int imm16) {

  2569 void Assembler::ret(int imm16) {

  2570   if (imm16 == 0) {

  2570   if (imm16 == 0) {

  2571     emit_byte(0xC3);

  2571     emit_byte(0xC3);

  2572   } else {

  2572   } else {

  2573     emit_byte(0xC2);

  2573     emit_byte(0xC2);

  2575   }

  2575   }

  2576 }

  2576 }

  2577 

  2577 

  2578 void Assembler::sahf() {

  2578 void Assembler::sahf() {

  2579 #ifdef _LP64

  2579 #ifdef _LP64