bytecodes.h

java 1.1 gemini 08_16

/*****************************************************************************
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/*******************************************************************************
 * Filename:
 * ---------
 *  bytecodes.h
 *
 * Project:
 * --------
 *  MAUI
 *
 * Description:
 * ------------
 *  
 *
 * Author:
 * -------
 *  
 *
 *==============================================================================
 * 				HISTORY
 * Below this line, this part is controlled by PVCS VM. DO NOT MODIFY!! 
 *------------------------------------------------------------------------------
 * removed!
 *
 * removed!
 * removed!
 * removed!
 *
 *
 *------------------------------------------------------------------------------
 * Upper this line, this part is controlled by PVCS VM. DO NOT MODIFY!! 
 *==============================================================================
 *******************************************************************************/


/*
 * Copyright ?2003 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 */

/*=========================================================================
 * SYSTEM:    KVM
 * SUBSYSTEM: Bytecode interpreter
 * FILE:      bytecodes.c
 * OVERVIEW:  This file defines the implementation of each of the
 *            Java bytecodes.
 *            The code has been separated from interpret.c so that we
 *            can more easily use different kinds of interpretation
 *            techniques and customize the VM to use sub/supersets
 *            of bytecodes.
 * AUTHOR:    Rewritten for better performance and customizability
 *            by Nik Shaylor 9/5/2000
 *=======================================================================*/

/* --------------------------------------------------------------------- */
#ifdef CLDC11
/* XXX!!! - CLDC 11 bytecodes, not refeind. refine that later. */
#if !REPLACESTANDARDBYTECODE
#if STANDARDBYTECODES
SELECT(NOP)             /* Do nothing */
DONE(1)
#endif

/* --------------------------------------------------------------------- */

#if STANDARDBYTECODES
SELECT(ACONST_NULL)     /* Push null reference onto the operand stack */
        pushStack(0);
DONE(1)
#endif

/* --------------------------------------------------------------------- */

#if STANDARDBYTECODES
SELECT(ICONST_M1)     /* Push integer constant -1 onto the operand stack */
        pushStack(-1);
DONE(1)
#endif

/* --------------------------------------------------------------------- */

#if STANDARDBYTECODES
SELECT(ICONST_0)       /* Push integer constant 0 onto the operand stack */
        pushStack(0);
DONE(1)
#endif

/* --------------------------------------------------------------------- */

#if STANDARDBYTECODES
SELECT(ICONST_1)       /* Push integer constant 1 onto the operand stack */
        pushStack(1);
DONE(1)
#endif

/* --------------------------------------------------------------------- */

#if STANDARDBYTECODES
SELECT(ICONST_2)       /* Push integer constant 2 onto the operand stack */
        pushStack(2);
DONE(1)
#endif

/* --------------------------------------------------------------------- */

#if STANDARDBYTECODES
SELECT(ICONST_3)       /* Push integer constant 3 onto the operand stack */
        pushStack(3);
DONE(1)
#endif

/* --------------------------------------------------------------------- */

#if STANDARDBYTECODES
SELECT(ICONST_4)       /* Push integer constant 4 onto the operand stack */
        pushStack(4);
DONE(1)
#endif

/* --------------------------------------------------------------------- */

#if STANDARDBYTECODES
SELECT(ICONST_5)       /* Push integer constant 5 onto the operand stack */
        pushStack(5);
DONE(1)
#endif

/* --------------------------------------------------------------------- */

#if STANDARDBYTECODES
SELECT(LCONST_0)  /* Push long integer constant 0 onto the operand stack */
		#if COMPILER_SUPPORTS_LONG
pushLongVal(0);
		#else
{
	ulong64 localZERO={0,0};
	pushLongVal(localZERO);
}
		#endif   /* COMPILER_SUPPORTS_LONG */
DONE(1)
#endif

/* --------------------------------------------------------------------- */

#if STANDARDBYTECODES
SELECT(LCONST_1)  /* Push long integer constant 1 onto the operand stack */
		#if COMPILER_SUPPORTS_LONG
pushLongVal(1);
		#else
			#if BIG_ENDIAN
ulong64 localONE={0,1};
			#else   /* LITTLE_ENDIAN */
ulong64 localONE={1,0};
			#endif   /* BIG_ENDIAN */
pushLongVal(localONE);
		#endif   /* COMPILER_SUPPORTS_LONG */
DONE(1)
#endif

/* --------------------------------------------------------------------- */

#if FLOATBYTECODES
SELECT(FCONST_0)         /* Push float constant 0 onto the operand stack */
        oneMore;
        *(float*)sp = 0.0f;
DONE(1)
#endif

/* --------------------------------------------------------------------- */

#if FLOATBYTECODES
SELECT(FCONST_1)         /* Push float constant 1 onto the operand stack */
        oneMore;
        *(float*)sp = 1.0f;
DONE(1)
#endif

/* --------------------------------------------------------------------- */

#if FLOATBYTECODES
SELECT(FCONST_2)         /* Push float constant 2 onto the operand stack */
        oneMore;
        *(float*)sp = 2.0f;
DONE(1)
#endif

/* --------------------------------------------------------------------- */

#if FLOATBYTECODES
SELECT(DCONST_0)  /* Push double float constant 0 onto the operand stack */
#if UPTODOWNSTACK
		moreStack(2);
        SET_DOUBLE(sp, 0.0);
#else
        oneMore;
        SET_DOUBLE(sp, 0.0);
        oneMore;
#endif
DONE(1)
#endif

/* --------------------------------------------------------------------- */

#if FLOATBYTECODES
SELECT(DCONST_1)  /* Push double float constant 1 onto the operand stack */
#if UPTODOWNSTACK
		moreStack(2);
        SET_DOUBLE(sp, 1.0);
#else
        oneMore;
        SET_DOUBLE(sp, 1.0);
        oneMore;
#endif
DONE(1)
#endif

/* --------------------------------------------------------------------- */

#if STANDARDBYTECODES
SELECT(BIPUSH)              /* Push byte constant onto the operand stack */
        int i = ((signed char *)ip)[1];
        pushStack(i);
DONE(2)
#endif

/* --------------------------------------------------------------------- */

#if STANDARDBYTECODES
SELECT(SIPUSH)             /* Push short constant onto the operand stack */
        short s = getShort(ip + 1);
        pushStack((int)s); /* Extends sign for negative numbers */
DONE(3)
#endif

/* --------------------------------------------------------------------- */

#if STANDARDBYTECODES
SELECT(LDC)       /* Push item from constant pool onto the operand stack */
        unsigned int cpIndex = ip[1];
        CONSTANTPOOL_ENTRY thisEntry = &cp->entries[cpIndex];
        pushStack(thisEntry->integer);
DONE(2)
#endif

/* --------------------------------------------------------------------- */

#if STANDARDBYTECODES
SELECT(LDC_W)               /* Push item from constant pool (wide index) */
        unsigned int cpIndex = getUShort(ip + 1);
        CONSTANTPOOL_ENTRY thisEntry = &cp->entries[cpIndex];
        pushStack(thisEntry->integer);
DONE(3)
#endif

/* --------------------------------------------------------------------- */

#if STANDARDBYTECODES
SELECT(LDC2_W)    /* Push double or long from constant pool (wide index) */
        unsigned int cpIndex = getUShort(ip + 1);
        CONSTANTPOOL_ENTRY thisEntry = &cp->entries[cpIndex];
        unsigned long hiBytes = (unsigned long)(thisEntry[0].integer);
        unsigned long loBytes = (unsigned long)(thisEntry[1].integer);
		#if UPTODOWNSTACK
		moreStack(2);
		SET_LONG_FROM_HALVES(sp, hiBytes, loBytes);
		#else
		oneMore;
		SET_LONG_FROM_HALVES(sp, hiBytes, loBytes);
		oneMore;
		#endif   /* UPTODOWNSTACK */
DONE(3)
#endif

/* --------------------------------------------------------------------- */

#if STANDARDBYTECODES
SELECT(ILOAD)            /* Load integer from local variable */
        unsigned int index = ip[1];
        pushStack(lp[index]);
DONE(2)
#endif

/* --------------------------------------------------------------------- */

#if STANDARDBYTECODES
SELECT(LLOAD)            /* Load long integer from local variable */
        unsigned int index = ip[1];
        pushStack(lp[index]);
        pushStack(lp[index+1]);
DONE(2)
#endif

/* --------------------------------------------------------------------- */

#if FLOATBYTECODES
SELECT(FLOAD)            /* Load float from local variable */
        unsigned int index = ip[1];
        pushStack(lp[index]);
DONE(2)
#endif

/* --------------------------------------------------------------------- */

#if FLOATBYTECODES
SELECT(DLOAD)            /* Load double float from local variable */
        unsigned int index = ip[1];
        pushStack(lp[index]);
        pushStack(lp[index+1]);
DONE(2)
#endif

/* --------------------------------------------------------------------- */

#if STANDARDBYTECODES
SELECT(ALOAD)            /* Load address from local variable */
        unsigned int index = ip[1];
        pushStack(lp[index]);
DONE(2)
#endif

/* --------------------------------------------------------------------- */

#if STANDARDBYTECODES
SELECT(ILOAD_0)      /* Load integer from first (zeroeth) local variable */
        pushStack(lp[0]);
DONE(1)
#endif

/* --------------------------------------------------------------------- */

#if STANDARDBYTECODES
SELECT(ILOAD_1)          /* Load integer from second local variable */
        pushStack(lp[1]);
DONE(1)
#endif

/* --------------------------------------------------------------------- */

#if STANDARDBYTECODES
SELECT(ILOAD_2)          /* Load integer from third local variable */
        pushStack(lp[2]);
DONE(1)
#endif

/* --------------------------------------------------------------------- */

#if STANDARDBYTECODES
SELECT(ILOAD_3)          /* Load integer from fourth local variable */
        pushStack(lp[3]);
DONE(1)
#endif

/* --------------------------------------------------------------------- */

#if STANDARDBYTECODES
SELECT(LLOAD_0)      /* Load integer from first (zeroeth) local variable */
        pushStack(lp[0]);
        pushStack(lp[1]);
DONE(1)
#endif

/* --------------------------------------------------------------------- */

#if STANDARDBYTECODES
SELECT(LLOAD_1)           /* Load integer from second local variable */
        pushStack(lp[1]);
        pushStack(lp[2]);
DONE(1)
#endif

/* --------------------------------------------------------------------- */

#if STANDARDBYTECODES
SELECT(LLOAD_2)          /* Load integer from third local variable */
        pushStack(lp[2]);
        pushStack(lp[3]);
DONE(1)
#endif

/* --------------------------------------------------------------------- */

#if STANDARDBYTECODES
SELECT(LLOAD_3)          /* Load integer from fourth local variable */
        pushStack(lp[3]);
        pushStack(lp[4]);
DONE(1)
#endif

/* --------------------------------------------------------------------- */

#if FLOATBYTECODES
SELECT(FLOAD_0)      /* Load integer from first (zeroeth) local variable */
        pushStack(lp[0]);
DONE(1)
#endif

/* --------------------------------------------------------------------- */

#if FLOATBYTECODES
SELECT(FLOAD_1)          /* Load integer from second local variable */
        pushStack(lp[1]);
DONE(1)
#endif