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/**********************************************************************
* pgen.c
* P-Code generation logic
*
* Copyright (C) 2008 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
**********************************************************************/
/**********************************************************************
* Included Files
**********************************************************************/
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include "config.h" /* Configuration */
#include "keywords.h" /* Standard types */
#include "pdefs.h" /* Common types */
#include "pofflib.h" /* POFF library definitions */
#include "podefs.h" /* Logical opcode definitions */
#include "pedefs.h" /* Error codes */
#include "pinsn16.h" /* 16-bit target INSN opcode definitions */
#include "perr.h" /* Error handling logic */
#include "pinsn.h" /* (to verify prototypes in this file) */
/**********************************************************************
* Definitions
**********************************************************************/
/**********************************************************************
* Global Variables
**********************************************************************/
extern poffHandle_t poffHandle; /* Handle to POFF object */
extern FILE *lstFile; /* LIST file pointer */
extern sint16 level; /* Static nesting level */
/**********************************************************************
* Private Variables
**********************************************************************/
static const uint16 opmap[NUM_OPCODES] =
{
oNOP, /* opNOP */
oNEG, /* opNEG */
oABS, /* opABS */
oINC, /* opINC */
oDEC, /* opDEC */
oNOT, /* opNOT */
oADD, /* opADD */
oSUB, /* opSUB */
oMUL, /* opMUL */
oDIV, /* opDIV */
oMOD, /* opMOD */
oSLL, /* opSLL */
oSRL, /* opSRL */
oSRA, /* opSRA */
oOR, /* opOR */
oAND, /* opAND */
oEQUZ, /* opEQUZ */
oNEQZ, /* opNEQZ */
oLTZ, /* opLTZ */
oGTEZ, /* opGTEZ */
oGTZ, /* opGTZ */
oLTEZ, /* opLTEZ */
oEQU, /* opEQU */
oNEQ, /* opNEQ */
oLT, /* opLT */
oGTE, /* opGTE */
oGT, /* opGT */
oLTE, /* opLTE */
oBIT, /* opBIT */
oLDIH, /* opLDI -- integer load maps to 16-bit load */
oLDIB, /* opLDIB */
oLDIM, /* opLDIM */
oSTIH, /* opSTI - integer store maps to 16-bit store */
oSTIB, /* opSTIB */
oSTIM, /* opSTIM */
oDUPH, /* opDUP -- integer duplicate maps to 16-bit duplicate */
oPUSHS, /* opPUSHS */
oPOPS, /* opPOPS */
oRET, /* opRET */
oEND, /* opEND */
oFLOAT, /* opFLOAT */
oJEQUZ, /* opJEQUZ */
oJNEQZ, /* opJNEQZ */
oJMP, /* opJMP */
oJEQU, /* opJEQU */
oJNEQ, /* opJNEQ */
oJLT, /* opJLT */
oJGTE, /* opJGTE */
oJGT, /* opJGT */
oJLTE, /* opJLTE */
oLDH, /* opLD -- integer load maps to 16-bit load */
oLDH, /* opLDH */
oLDB, /* opLDB */
oLDM, /* opLDM */
oSTH, /* opST -- integer store maps to 16-bit store */
oSTB, /* opSTB */
oSTM, /* opSTM */
oLDXH, /* opLDX -- integer load maps to 16-bit load */
oLDXB, /* opLDXB */
oLDXM, /* opLDXM */
oSTXH, /* opSTX -- integer store maps to 16-bit store */
oSTXB, /* opSTXB */
oSTXM, /* opSTXM */
oLA, /* opLA */
oLAC, /* opLAC */
oPUSH, /* opPUSH */
oINDS, /* opINDS */
oLAX, /* opLAX */
oLIB, /* opLIB */
oLABEL, /* opLABEL */
oPCAL, /* opPCAL */
oLDSH, /* opLDS -- integer store maps to 16-bit load */
oLDSH, /* opLDSH */
oLDSB, /* opLDSB */
oLDSM, /* opLDSM */
oSTSH, /* opSTS -- integer store maps to 16-bit store */
oSTSB, /* opSTSB */
oSTSM, /* opSTSM */
oLDSXH, /* opLDSX -- integer load maps to 16-bit load */
oLDSXB, /* opLDSXB */
oLDSXM, /* opLDSXM */
oSTSXH, /* opSTSX -- integer store maps to 16-bit store */
oSTSXB, /* opSTSXB */
oSTSXM, /* opSTSXM */
oLAS, /* opLAS */
oLASX, /* opLASX */
oSYSIO, /* opSYSIO */
oLINE, /* opLINE */
};
/***********************************************************************
* Private Function Prototypes
***********************************************************************/
/***********************************************************************
* Private Functions
***********************************************************************/
static void
insn16_Generate(enum pcode_e opcode, uint16 arg1, sint32 arg2);
/***********************************************************************
* Private Functions
***********************************************************************/
/***********************************************************************/
/* Disassemble an Op-code */
#if CONFIG_DEBUG
static inline void
insn16_DisassemblePCode(ubyte opcode, ubyte arg1, uint16 arg2)
{
OPTYPE op;
op.op = opcode;
op.arg1 = arg1;
op.arg2 = arg2;
insn_DisassemblePCode(lstFile, &op);
}
#else
# define insn16_DisassemblePCode(op,a1,a2)
#endif
/***********************************************************************/
/* Generate an Op-Code */
static void
insn16_Generate(enum pcode_e opcode, uint16 arg1, sint32 arg2)
{
uint16 insn_opcode = opmap[opcode];
uint16 arg16;
TRACE(lstFile,"[insn16_Generate:0x%02x->0x%04x]", opcode, insn_opcode);
poffAddProgByte(poffHandle, insn_opcode);
if (insn_opcode & o8)
{
if (arg1 > 0xff) error(eINTOVF);
poffAddProgByte(poffHandle, (ubyte)arg1);
} /* End if */
if (insn_opcode & o16)
{
if ((arg2 < -32768) || (arg2 > 65535)) error(eINTOVF);
arg16 = (uint16)arg2;
poffAddProgByte(poffHandle, (ubyte)(arg16 >> 8));
poffAddProgByte(poffHandle, (ubyte)(arg16 & 0xff));
} /* End if */
/* Now, add the disassembled PCode to the list file. */
insn16_DisassemblePCode(insn_opcode, arg1, arg2);
} /* end insn16_Generate */
/***********************************************************************
* Public Functions
***********************************************************************/
void
insn_GenerateSimple(enum pcode_e opcode)
{
insn16_Generate(opcode, 0, 0);
}
/***********************************************************************/
void
insn_GenerateDataOperation(enum pcode_e opcode, sint32 data)
{
insn16_Generate(opcode, 0, data);
}
/***********************************************************************/
/* Data size for a multiple register operation (in bytes) is simply
* represented by that value at the top of the stack.
*/
void insn_GenerateDataSize(uint32 dwDataSize)
{
insn16_Generate(opPUSH, 0, dwDataSize);
}
/***********************************************************************/
void
insn_GenerateFpOperation(ubyte fpOpcode)
{
insn16_Generate(opFLOAT, fpOpcode, 0);
}
/***********************************************************************/
void
insn_GenerateIoOperation(uint16 ioOpcode, uint16 fileNumber)
{
insn16_Generate(opSYSIO, fileNumber, (sint32)ioOpcode);
}
/***********************************************************************/
void
insn_BuiltInFunctionCall(uint16 libOpcode)
{
insn16_Generate(opLIB, 0, (sint32)libOpcode);
}
/***********************************************************************/
void
insn_GenerateLevelReference(enum pcode_e opcode, uint16 level, sint32 offset)
{
insn16_Generate(opcode, level, offset);
}
/***********************************************************************/
void
insn_GenerateProcedureCall(uint16 level, sint32 offset)
{
insn16_Generate(opPCAL, level, offset);
}
/***********************************************************************/
void
insn_GenerateLineNumber(uint16 includeNumber, uint32 lineNumber)
{
insn16_Generate(opLINE, includeNumber, lineNumber);
}
/***********************************************************************/
void
insn_SetStackLevel(uint32 level)
{
/* Do nothing */
}
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