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/* Utility macros to handle Java(TM) byte codes.
Copyright (C) 1996, 1998, 1999, 2003 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GCC 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 for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
Java and all Java-based marks are trademarks or registered trademarks
of Sun Microsystems, Inc. in the United States and other countries.
The Free Software Foundation is independent of Sun Microsystems, Inc. */
/* Written by Per Bothner <bothner@cygnus.com>, February 1996. */
#ifndef GCC_JAVAOP_H
#define GCC_JAVAOP_H
typedef unsigned char uint8;
#ifndef int16
#define int16 short
#endif
typedef unsigned int16 uint16;
#ifndef int32
#define int32 long
#endif
typedef unsigned int32 uint32;
/* A signed 64-bit (or more) integral type, suitable for Java's 'long'. */
#ifndef int64
#define int64 long long
#endif
/* An unsigned 64-bit (or more) integral type, same length as int64. */
#ifndef uint64
#define uint64 unsigned int64
#endif
typedef uint16 jchar;
typedef signed char jbyte;
typedef int16 jshort;
typedef int32 jint;
typedef int64 jlong;
typedef void* jref;
/* A 32-bit big-endian IEEE single-precision float. */
typedef struct _jfloat {
unsigned int negative : 1;
unsigned int exponent : 8;
unsigned int mantissa : 23;
} jfloat;
#define JFLOAT_FINITE(f) ((f).exponent != 0xFF)
#define JFLOAT_QNAN_MASK 0x400000
#define JFLOAT_EXP_BIAS 0x7f
/* A 32-bit big-endian IEEE double-precision float. */
typedef struct _jdouble {
unsigned int negative : 1;
unsigned int exponent : 11;
unsigned int mantissa0: 20;
unsigned int mantissa1: 32;
} jdouble;
#define JDOUBLE_FINITE(f) ((f).exponent != 0x7FF)
#define JDOUBLE_QNAN_MASK 0x80000 /* apply to mantissa0 */
#define JDOUBLE_EXP_BIAS 0x3ff
/* A jword is an unsigned integral type big enough for a 32-bit jint
or jfloat *or* a pointer. It is the type appropriate for stack
locations and local variables in a Java interpreter. */
#ifndef jword
#define jword uint32
#endif
#ifndef IMMEDIATE_u1
#define IMMEDIATE_u1 (PC++, CHECK_PC_IN_RANGE(PC), BCODE[PC-1])
#endif
#ifndef IMMEDIATE_s1
#define IMMEDIATE_s1 (PC++, CHECK_PC_IN_RANGE(PC), (signed char)BCODE[PC-1])
#endif
#ifndef IMMEDIATE_s2
#define IMMEDIATE_s2 (PC+=2, CHECK_PC_IN_RANGE(PC), \
(signed char) BCODE[PC-2] * 256 + BCODE[PC-1])
#endif
#ifndef IMMEDIATE_u2
#define IMMEDIATE_u2 (PC+=2, CHECK_PC_IN_RANGE(PC),\
(BCODE[PC-2] * 256 + BCODE[PC-1]))
#endif
#ifndef IMMEDIATE_s4
#define IMMEDIATE_s4 (PC+=4, CHECK_PC_IN_RANGE(PC), \
(WORD_TO_INT((BCODE[PC-4] << 24) | (BCODE[PC-3] << 16) \
| (BCODE[PC-2] << 8) | (BCODE[PC-1]))))
#endif
static inline jfloat
WORD_TO_FLOAT(jword w)
{
jfloat f;
f.negative = (w & 0x80000000) >> 31;
f.exponent = (w & 0x7f800000) >> 23;
f.mantissa = (w & 0x007fffff);
return f;
}
/* Sign extend w. If the host on which this cross-compiler runs uses
a 64-bit type for jword the appropriate sign extension is
performed; if it's a 32-bit type the arithmetic does nothing but is
harmless. */
static inline jint
WORD_TO_INT(jword w)
{
jint n = w & 0xffffffff; /* Mask lower 32 bits. */
n ^= (jint)1 << 31;
n -= (jint)1 << 31; /* Sign extend lower 32 bits to upper. */
return n;
}
static inline jlong
WORDS_TO_LONG(jword hi, jword lo)
{
return ((jlong) hi << 32) | ((jlong)lo & (((jlong)1 << 32) -1));
}
static inline jdouble
WORDS_TO_DOUBLE(jword hi, jword lo)
{
jdouble d;
d.negative = (hi & 0x80000000) >> 31;
d.exponent = (hi & 0x7ff00000) >> 20;
d.mantissa0 = (hi & 0x000fffff);
d.mantissa1 = lo;
return d;
}
/* If PREFIX_CHAR is the first character of the Utf8 encoding of a character,
return the number of bytes taken by the encoding.
Return -1 for a continuation character. */
#define UT8_CHAR_LENGTH(PREFIX_CHAR) \
((unsigned char)(PREFIX_CHAR) < 128 ? 1 \
: ((PREFIX_CHAR) & 0x40) == 0 ? -1 \
: ((PREFIX_CHAR) & 0x20) == 0 ? 2 \
: ((PREFIX_CHAR) & 0x10) == 0 ? 3 \
: ((PREFIX_CHAR) & 0x08) == 0 ? 4 : 5)
#endif /* ! GCC_JAVAOP_H */
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