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1 //
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2 // Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
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3 // DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 //
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5 // This code is free software; you can redistribute it and/or modify it
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6 // under the terms of the GNU General Public License version 2 only, as
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7 // published by the Free Software Foundation.
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8 //
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9 // This code is distributed in the hope that it will be useful, but WITHOUT
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10 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 // version 2 for more details (a copy is included in the LICENSE file that
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13 // accompanied this code).
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14 //
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15 // You should have received a copy of the GNU General Public License version
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16 // 2 along with this work; if not, write to the Free Software Foundation,
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17 // Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 //
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19 // Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 // or visit www.oracle.com if you need additional information or have any
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21 // questions.
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22 //
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23 //
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24
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25 // AMD64 Bsd Architecture Description File
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26
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27 //----------OS-DEPENDENT ENCODING BLOCK----------------------------------------
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28 // This block specifies the encoding classes used by the compiler to
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29 // output byte streams. Encoding classes generate functions which are
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30 // called by Machine Instruction Nodes in order to generate the bit
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31 // encoding of the instruction. Operands specify their base encoding
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32 // interface with the interface keyword. There are currently
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33 // supported four interfaces, REG_INTER, CONST_INTER, MEMORY_INTER, &
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34 // COND_INTER. REG_INTER causes an operand to generate a function
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35 // which returns its register number when queried. CONST_INTER causes
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36 // an operand to generate a function which returns the value of the
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37 // constant when queried. MEMORY_INTER causes an operand to generate
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38 // four functions which return the Base Register, the Index Register,
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39 // the Scale Value, and the Offset Value of the operand when queried.
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40 // COND_INTER causes an operand to generate six functions which return
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41 // the encoding code (ie - encoding bits for the instruction)
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42 // associated with each basic boolean condition for a conditional
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43 // instruction. Instructions specify two basic values for encoding.
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44 // They use the ins_encode keyword to specify their encoding class
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45 // (which must be one of the class names specified in the encoding
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46 // block), and they use the opcode keyword to specify, in order, their
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47 // primary, secondary, and tertiary opcode. Only the opcode sections
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48 // which a particular instruction needs for encoding need to be
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49 // specified.
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50 encode %{
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51 // Build emit functions for each basic byte or larger field in the intel
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52 // encoding scheme (opcode, rm, sib, immediate), and call them from C++
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53 // code in the enc_class source block. Emit functions will live in the
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54 // main source block for now. In future, we can generalize this by
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55 // adding a syntax that specifies the sizes of fields in an order,
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56 // so that the adlc can build the emit functions automagically
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57
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58 %}
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59
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60
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61 // Platform dependent source
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62
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63 source %{
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64
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65 %}
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