Mercurial > hg > truffle
view src/os_cpu/bsd_x86/vm/bsd_x86_64.ad @ 10336:38da9f4f6709 hs25-b34
Merge
author | amurillo |
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date | Fri, 24 May 2013 09:25:42 -0700 |
parents | e961c11b85fe |
children |
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// // 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 Bsd 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 %} // Platform dependent source source %{ %}