01: /*
02: * @(#)CVMTypeCode.java 1.11 06/10/10
03: *
04: * Copyright 1990-2006 Sun Microsystems, Inc. All Rights Reserved.
05: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
06: *
07: * This program is free software; you can redistribute it and/or
08: * modify it under the terms of the GNU General Public License version
09: * 2 only, as published by the Free Software Foundation.
10: *
11: * This program is distributed in the hope that it will be useful, but
12: * WITHOUT ANY WARRANTY; without even the implied warranty of
13: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14: * General Public License version 2 for more details (a copy is
15: * included at /legal/license.txt).
16: *
17: * You should have received a copy of the GNU General Public License
18: * version 2 along with this work; if not, write to the Free Software
19: * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20: * 02110-1301 USA
21: *
22: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
23: * Clara, CA 95054 or visit www.sun.com if you need additional
24: * information or have any questions.
25: *
26: */
27: /*
28: * CVM has a complex scheme for representing types as 16-bit
29: * cookies. This code mimics the run-time code and thus builds the
30: * corresponding data structures, to be ROMed.
31: */
32:
33: package vm;
34:
35: public interface CVMTypeCode {
36: public static final int CVM_T_ERROR = 0;
37: public static final int CVM_T_ENDFUNC = 1;
38: public static final int CVM_T_VOID = 2;
39: public static final int CVM_T_INT = 3;
40: public static final int CVM_T_SHORT = 4;
41: public static final int CVM_T_CHAR = 5;
42: public static final int CVM_T_LONG = 6;
43: public static final int CVM_T_BYTE = 7;
44: public static final int CVM_T_FLOAT = 8;
45: public static final int CVM_T_DOUBLE = 9;
46: public static final int CVM_T_BOOLEAN = 10;
47:
48: public static final int CVM_T_OBJ = 11;
49:
50: public static final int CVMtypeLastScalar = CVM_T_BOOLEAN;
51:
52: // parameters of the encoding
53: public static final int CVMtypeArrayShift = 14;
54: static final int CVMtypeCookieSize = 16;
55:
56: // the below values are all derived from the above as follows:
57: // CVMtypeBasetypeMask = ((1<<CVMtypeArrayShift) - 1)
58: // CVMtypeArrayMask = ((1<<(CVMtypeCookieSize-CVMtypeArrayShift)) - 1)
59: // <<CVMtypeArrayShift
60: // CVMtypeBigArray = CVMtypeArrayMask
61: // CVMtypeMaxSmallArray = (CVMtypeBigArray>>CVMtypeArrayShift) - 1
62:
63: public static final int CVMtypeArrayMask = 0xc000;
64: public static final int CVMtypeBasetypeMask = 0x3fff;
65: public static final int CVMtypeBigArray = 0xc000;
66: public static final int CVMtypeMaxSmallArray = 2;
67:
68: }
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