//

// Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.

// DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

//

// This code is free software; you can redistribute it and/or modify it

// under the terms of the GNU General Public License version 2 only, as

// published by the Free Software Foundation.

//

// This code is distributed in the hope that it will be useful, but WITHOUT

// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

// version 2 for more details (a copy is included in the LICENSE file that

// accompanied this code).

//

// You should have received a copy of the GNU General Public License version

// 2 along with this work; if not, write to the Free Software Foundation,

// Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

//

// Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

// or visit www.oracle.com if you need additional information or have any

// questions.

//

//

// X86 Win32 Architecture Description File

//----------OS-DEPENDENT ENCODING BLOCK-----------------------------------------------------

// This block specifies the encoding classes used by the compiler to output

// byte streams.  Encoding classes generate functions which are called by

// Machine Instruction Nodes in order to generate the bit encoding of the

// instruction.  Operands specify their base encoding interface with the

// interface keyword.  There are currently supported four interfaces,

// REG_INTER, CONST_INTER, MEMORY_INTER, & COND_INTER.  REG_INTER causes an

// operand to generate a function which returns its register number when

// queried.   CONST_INTER causes an operand to generate a function which

// returns the value of the constant when queried.  MEMORY_INTER causes an

// operand to generate four functions which return the Base Register, the

// Index Register, the Scale Value, and the Offset Value of the operand when

// queried.  COND_INTER causes an operand to generate six functions which

// return the encoding code (ie - encoding bits for the instruction)

// associated with each basic boolean condition for a conditional instruction.

// Instructions specify two basic values for encoding.  They use the

// ins_encode keyword to specify their encoding class (which must be one of

// the class names specified in the encoding block), and they use the

// opcode keyword to specify, in order, their primary, secondary, and

// tertiary opcode.  Only the opcode sections which a particular instruction

// needs for encoding need to be specified.

encode %{

  // Build emit functions for each basic byte or larger field in the intel

  // encoding scheme (opcode, rm, sib, immediate), and call them from C++

  // code in the enc_class source block.  Emit functions will live in the

  // main source block for now.  In future, we can generalize this by

  // adding a syntax that specifies the sizes of fields in an order,

  // so that the adlc can build the emit functions automagically

  enc_class tlsencode (eRegP dst, eRegP src) %{

    emit_rm(cbuf, 0x2, $dst$$reg, $src$$reg);

    emit_d32(cbuf, ThreadLocalStorage::get_thread_ptr_offset() );

  %}

  enc_class call_epilog %{

    if( VerifyStackAtCalls ) {

      // Check that stack depth is unchanged: find majik cookie on stack

      int framesize = ra_->reg2offset_unchecked(OptoReg::add(ra_->_matcher._old_SP,-3*VMRegImpl::slots_per_word));

      if(framesize >= 128) {

        emit_opcode(cbuf, 0x81); // cmp [esp+0],0xbadb1ood

        emit_d8(cbuf,0xBC);

        emit_d8(cbuf,0x24);

        emit_d32(cbuf,framesize); // Find majik cookie from ESP

        emit_d32(cbuf, 0xbadb100d);

      }

      else {

        emit_opcode(cbuf, 0x81); // cmp [esp+0],0xbadb1ood

        emit_d8(cbuf,0x7C);

        emit_d8(cbuf,0x24);

        emit_d8(cbuf,framesize); // Find majik cookie from ESP

        emit_d32(cbuf, 0xbadb100d);

      }

      // jmp EQ around INT3

      emit_opcode(cbuf,0x74);

      emit_d8(cbuf,1);

      // Die if stack mismatch

      emit_opcode(cbuf,0xCC);

    }

  %}

%}

// INSTRUCTIONS -- Platform dependent

//----------OS and Locking Instructions----------------------------------------

// The prefix of this name is KNOWN by the ADLC and cannot be changed.

instruct tlsLoadP_prefixLoadP(eRegP t1) %{

  effect(DEF t1);

  format %{ "MOV    $t1,FS:[0x00] "%}

  opcode(0x8B, 0x64);

  ins_encode(OpcS, OpcP, conmemref(t1));

  ins_pipe( ialu_reg_fat );

%}

// This name is KNOWN by the ADLC and cannot be changed.

// The ADLC forces a 'TypeRawPtr::BOTTOM' output type

// for this guy.

// %%% Should do this with a clause like:  bottom_type(TypeRawPtr::BOTTOM);

instruct tlsLoadP(eRegP dst, eRegP t1) %{

  effect(DEF dst, USE t1);

  format %{ "MOV    $dst,[$t1 + TLS::thread_ptr_offset()]" %}

  opcode(0x8B);

  ins_encode(OpcP, tlsencode(dst, t1));

  ins_pipe( ialu_reg_reg_fat );

%}

instruct TLS(eRegP dst) %{

  match(Set dst (ThreadLocal));

  expand %{

    eRegP t1;

    tlsLoadP_prefixLoadP(t1);

    tlsLoadP(dst, t1);

  %}

%}

// Die now

instruct ShouldNotReachHere( )

%{

  match(Halt);

  // Use the following format syntax

  format %{ "INT3   ; ShouldNotReachHere" %}

  opcode(0xCC);

  ins_encode(OpcP);

  ins_pipe( pipe_slow );

%}

//

// Platform dependent source

//

source %{

// emit an interrupt that is caught by the debugger

void emit_break(CodeBuffer &cbuf) {

  cbuf.insts()->emit_int8((unsigned char) 0xcc);

}

void MachBreakpointNode::emit(CodeBuffer &cbuf, PhaseRegAlloc *ra_) const {

  emit_break(cbuf);

}

uint MachBreakpointNode::size(PhaseRegAlloc *ra_) const {

  return 1;

}

%}