1 /* Utility macros to handle Java(TM) byte codes.
3 Copyright (C) 1996, 1998, 1999 Free Software Foundation, Inc.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2, or (at your option)
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNU CC; see the file COPYING. If not, write to
17 the Free Software Foundation, 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
20 Java and all Java-based marks are trademarks or registered trademarks
21 of Sun Microsystems, Inc. in the United States and other countries.
22 The Free Software Foundation is independent of Sun Microsystems, Inc. */
24 /* Written by Per Bothner <bothner@cygnus.com>, February 1996. */
29 typedef unsigned char uint8;
33 typedef unsigned int16 uint16;
38 typedef unsigned int32 uint32;
40 /* A signed 64-bit (or more) integral type, suiteable for Java's 'long'. */
42 #define int64 long long
44 /* An unsigned 64-bit (or more) integral type, same length as int64. */
46 #define uint64 unsigned int64
51 typedef signed char jbyte;
60 /* A 32-bit IEEE single-precision float. */
65 /* A 32-bit IEEE double-precision float. */
67 #define jdouble double
76 /* A jword is an unsigned integral type big enough for a 32-bit jint
77 or jfloat *or* a pointer. It is the type appropriate for stack
78 locations and local variables in a Java interpreter. */
86 #define IMMEDIATE_u1 (PC++, CHECK_PC_IN_RANGE(PC), BCODE[PC-1])
89 #define IMMEDIATE_s1 (PC++, CHECK_PC_IN_RANGE(PC), (signed char)BCODE[PC-1])
92 #define IMMEDIATE_s2 (PC+=2, CHECK_PC_IN_RANGE(PC), \
93 (signed char) BCODE[PC-2] * 256 + BCODE[PC-1])
96 #define IMMEDIATE_u2 (PC+=2, CHECK_PC_IN_RANGE(PC),\
97 (BCODE[PC-2] * 256 + BCODE[PC-1]))
100 #define IMMEDIATE_s4 (PC+=4, CHECK_PC_IN_RANGE(PC), \
101 ((jint)((BCODE[PC-4] << 24) | (BCODE[PC-3] << 16) \
102 | (BCODE[PC-2] << 8) | (BCODE[PC-1]))))
109 WORD_TO_FLOAT(jword w)
119 WORDS_TO_LONG(jword hi, jword lo)
121 return ((jlong) hi << 32) | ((jlong)lo & (((jlong)1 << 32) -1));
134 WORDS_TO_DOUBLE(jword hi, jword lo)
136 wu.l = WORDS_TO_LONG(hi, lo);
140 /* If PREFIX_CHAR is the first character of the Utf8 encoding of a character,
141 return the number of bytes taken by the encoding.
142 Return -1 for a continuation character. */
143 #define UT8_CHAR_LENGTH(PREFIX_CHAR) \
144 ((unsigned char)(PREFIX_CHAR) < 128 ? 1 \
145 : ((PREFIX_CHAR) & 0x40) == 0 ? -1 \
146 : ((PREFIX_CHAR) & 0x20) == 0 ? 2 \
147 : ((PREFIX_CHAR) & 0x10) == 0 ? 3 \
148 : ((PREFIX_CHAR) & 0x08) == 0 ? 4 : 5)
150 #endif /* !JAVAOP_H */