Mercurial > jdk8-mips64-public > hotspot / file revision

 //

 // Copyright (c) 2003, 2012, 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.

 //

 //

 // AMD64 Linux 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 Java_To_Runtime(method meth) %{

     // No relocation needed

     // movq r10, <meth>

     emit_opcode(cbuf, Assembler::REX_WB);

     emit_opcode(cbuf, 0xB8 | (R10_enc - 8));

     emit_d64(cbuf, (int64_t) $meth$$method);

     // call (r10)

     emit_opcode(cbuf, Assembler::REX_B);

     emit_opcode(cbuf, 0xFF);

     emit_opcode(cbuf, 0xD0 | (R10_enc - 8));

   %}

 %}

 // Platform dependent source

 source %{

 int MachCallRuntimeNode::ret_addr_offset() {

   return 13; // movq r10,#addr; callq (r10)

 }

 %}