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riedelx |
/*******************************************
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assem.c
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an assembler for the TinyX CPU
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TGB Ulrich Riedel 20040313
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*******************************************/
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#include
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#include
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#include
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#include
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typedef struct _tag_Tmcode {
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struct _tag_Tmcode *prev;
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struct _tag_Tmcode *next;
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int linenumber;
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unsigned long addr; // machinecode address
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char label[34]; // destination label
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char mnemo[16]; // mnemonic or directive
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char operand1[80]; // operands
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char operand2[80];
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char operand3[80];
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unsigned char mcod[128]; // machinecode ( maximum of 1024 bit instruction code )
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unsigned char imm[128];
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unsigned long oaddr1; // operand address1
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unsigned long oaddr2; // operand address2
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unsigned long oaddr3; // operand address2
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char olabel1[34]; // operand label1
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char olabel2[34]; // operand label2
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char olabel3[34]; // operand label3
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} Tmcode;
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typedef struct {
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unsigned long addr;
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char label[40];
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} Taddress;
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int g_wordSize; // processor word size
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char *getvalue(char *str, unsigned char *val); // reads string value
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int main(int argc,char *argv[])
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{
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FILE *fp;
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char filename[256];
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unsigned char binTemp[128];
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char line[80];
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char tmpStr[40];
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char *tempPtr;
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int linenumber, idx, maxi, jdx, sdx;
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unsigned short slen;
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Tmcode *head, *tail, *cPtr, *hPtr, *tPtr;
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unsigned long addr, val1, val2, val3;
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unsigned char code[128], chksum, lsn, msn;
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Taddress *address;
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unsigned char ccMode;
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unsigned char aluMode;
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unsigned char updateFlag;
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unsigned char carryUse;
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unsigned char writeCycle;
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unsigned char memRead;
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unsigned char immediate;
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unsigned char valmux;
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unsigned char dstReg;
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unsigned char src1Reg;
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unsigned char src2Reg;
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g_wordSize = 0;
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if (argc == 1) {
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fprintf(stderr, "usage: tinyx file\n");
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return 1;
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}
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fp = fopen(argv[1], "r");
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if(NULL == fp) {
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fprintf(stderr, "%s doesn't exist\n", argv[1]);
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return 2;
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}
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strncpy(filename, argv[1], 120);
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strcat(filename, ".HEX");
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printf("prepass\n");
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/////////// pre pass /////////////////////////////////////
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linenumber = 1; // sourcecode linenumber count
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head = tail = NULL;
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while(fgets(line, 79, fp)) {
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if(line[0] == 0) { // empty line
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linenumber++;
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continue;
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}
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sdx = strlen(line);
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for(idx=0; idx
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if(!isspace(line[idx])) break;
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}
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if(sdx == idx) { // whitespace line
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linenumber++;
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continue;
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}
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///////// make line to uppercase characters, ignoring comment lines
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for(idx=0; line[idx]; idx++) {
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if(line[idx] == 13) { line[idx] = 0; continue; } // return
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if(line[idx] == 10) { line[idx] = 0; continue; } // linefeed
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if(line[idx] == 9) { line[idx] = 32; continue; } // tab
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if((line[idx] & 0xE0) == 0) {
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fprintf(stderr, "%d contains non printable characters.\n", linenumber);
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return 3;
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}
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if(line[idx] < 0) {
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fprintf(stderr, "%d contains non printable characters\n", linenumber);
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return 3;
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}
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line[idx] = toupper(line[idx]);
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}
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if(line[0] == ';') { linenumber++; continue; } // skip comment lines
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if(line[0] == '.') {
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fprintf(stderr, "%d no directive first allowed\n", linenumber);
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linenumber++;
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continue;
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}
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///////// break into up to 5 components //////////////////
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//////// alloc mcode structure for this sourcecode line
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hPtr = (Tmcode *) malloc(sizeof(Tmcode));
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memset(hPtr, 0, sizeof(Tmcode));
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if(head == NULL) {
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head = hPtr;
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tail = hPtr;
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cPtr = head;
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} else {
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tPtr = cPtr;
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cPtr->next = hPtr;
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cPtr = cPtr->next;
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cPtr->prev = tPtr;
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tail = cPtr;
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}
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hPtr->linenumber = linenumber;
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///////// 1st component, label ///////////////////////////
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idx = 0; // start at beginning sourcecode line
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if(!isspace(line[0])) { // first char nonspace?
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for(; line[idx] && (idx<32); idx++) { // label max 32 chars
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if(isspace(line[idx])) break; // delimiter
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if(line[idx] == ';') break; // comment
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tmpStr[idx] = line[idx];
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}
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tmpStr[idx] = 0;
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strcpy(hPtr->label, tmpStr); // save label
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}
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if(0 == line[idx]) { // end of line?, label only
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linenumber++;
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continue;
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}
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///////// 2nd component, mnemonic or directive ///////////
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while(isspace(line[idx])) idx++; // skip space
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for(jdx=0; line[idx] && (jdx<15); jdx++) {
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if(isspace(line[idx])) break; // delimiter
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if(line[idx] == ';') break; // comment
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tmpStr[jdx] = line[idx++];
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}
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tmpStr[jdx] = 0;
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strcpy(hPtr->mnemo, tmpStr); // save mnemonic or directive
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if(0 == line[idx]) { // suddenly end of line?
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fprintf(stderr, "%d operand missing\n", linenumber);
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linenumber++;
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continue;
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}
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while(isspace(line[idx])) idx++; // skip space
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if(0 == line[idx]) { // suddenly end of line?
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fprintf(stderr, "%d operand missing\n", linenumber);
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linenumber++;
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continue;
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}
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///////// 3,4,5th component, operands /////////////////////////
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//// fetch operads strings
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for(jdx=0; line[idx] && (jdx<80); jdx++) {
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tmpStr[jdx] = line[idx++];
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}
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tmpStr[jdx] = 0;
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sdx = jdx;
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jdx = 0;
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//// remove spaces between operands
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for(idx=0; idx
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if(isspace(tmpStr[idx])) continue;
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if(tmpStr[idx] == ';') break; // comment
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tmpStr[jdx++] = tmpStr[idx];
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}
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tmpStr[jdx] = 0;
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hPtr->operand1[0] = 0;
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hPtr->operand2[0] = 0;
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hPtr->operand3[0] = 0;
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idx = 0;
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for(jdx=0; tmpStr[idx] && jdx<70; jdx++) {
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if(tmpStr[idx] == 0) break;
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if(tmpStr[idx] == ',') break;
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hPtr->operand1[jdx] = tmpStr[idx++];
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}
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hPtr->operand1[jdx] = 0;
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if(tmpStr[idx]) {
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idx++;
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| 198 |
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for(jdx=0; tmpStr[idx] && jdx<70; jdx++) {
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| 199 |
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if(tmpStr[idx] == 0) break;
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| 200 |
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if(tmpStr[idx] == ',') break;
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| 201 |
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hPtr->operand2[jdx] = tmpStr[idx++];
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}
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hPtr->operand2[jdx] = 0;
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| 204 |
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if(tmpStr[idx]) {
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idx++;
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for(jdx=0; tmpStr[idx] && jdx<70; jdx++) {
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| 207 |
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if(tmpStr[idx] == 0) break;
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| 208 |
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if(tmpStr[idx] == ',') break;
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| 209 |
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hPtr->operand3[jdx] = tmpStr[idx++];
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| 210 |
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}
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hPtr->operand3[jdx] = 0;
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| 212 |
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}
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| 213 |
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}
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hPtr->linenumber = linenumber;
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linenumber++;
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}
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fclose(fp);
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| 219 |
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#if 0
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///////////////// test output //////////////////////////////////
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hPtr = head;
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while(hPtr) {
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printf("%d <%s><%s><%s><%s><%s>\n", hPtr->linenumber,
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hPtr->label,
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hPtr->mnemo,
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hPtr->operand1,
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hPtr->operand2,
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hPtr->operand3);
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hPtr = hPtr->next;
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}
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#endif
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| 233 |
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printf("1st pass\n");
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/////////// 1st pass ////////////////////////////////////
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addr = 0;
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hPtr = head;
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| 237 |
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while(hPtr) {
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| 238 |
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hPtr->addr = addr;
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| 239 |
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if(!strlen(hPtr->mnemo)) { // label only
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| 240 |
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hPtr = hPtr->next;
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| 241 |
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continue;
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| 242 |
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}
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| 243 |
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///////// check on directives ///////////////////////////
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| 244 |
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if(!strcmp(hPtr->mnemo, ".WORDSIZE")) { // set processor wordsize
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| 245 |
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if(g_wordSize) {
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| 246 |
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fprintf(stderr, "processor wordsize already set!\n");
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| 247 |
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return 5;
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| 248 |
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}
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| 249 |
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g_wordSize = atoi(hPtr->operand1);
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| 250 |
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if(g_wordSize < 32) {
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| 251 |
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fprintf(stderr, "wordsize at least of 32 and multiple of 8 needed!\n");
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| 252 |
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return 6;
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| 253 |
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}
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| 254 |
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if(g_wordSize & 7) {
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| 255 |
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fprintf(stderr, "wordsize at least of 32 and multiple of 8 needed!\n");
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| 256 |
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return 7;
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| 257 |
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}
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| 258 |
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hPtr->linenumber = -1;
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| 259 |
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hPtr = hPtr->next;
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| 260 |
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continue;
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| 261 |
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}
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| 262 |
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if(g_wordSize == 0) {
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| 263 |
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fprintf(stderr, "missing, wordsize at least of 32 and multiple of 8 needed!\n");
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| 264 |
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return 8;
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| 265 |
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}
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| 266 |
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if(!strcmp(hPtr->mnemo, ".ORG")) { // set location address
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| 267 |
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addr = strtol(hPtr->operand1, &tempPtr, 16);
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| 268 |
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hPtr->addr = addr;
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| 269 |
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hPtr->linenumber = -1;
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| 270 |
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hPtr = hPtr->next;
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| 271 |
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continue;
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| 272 |
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}
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| 273 |
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if(!strcmp(hPtr->mnemo, ".DC")) { // define constant
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| 274 |
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getvalue(hPtr->operand1, binTemp);
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| 275 |
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idx = g_wordSize / 8;
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| 276 |
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memset(hPtr->mcod, 0, sizeof(hPtr->mcod));
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| 277 |
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memcpy(hPtr->mcod, &binTemp[128-idx], idx);
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| 278 |
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hPtr = hPtr->next;
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| 279 |
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addr++;
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| 280 |
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continue;
|
| 281 |
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}
|
| 282 |
|
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ccMode = 16;
|
| 283 |
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aluMode = 16;
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| 284 |
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updateFlag = 0;
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| 285 |
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carryUse = 0;
|
| 286 |
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writeCycle = 0;
|
| 287 |
|
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memRead = 0;
|
| 288 |
|
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immediate = 0;
|
| 289 |
|
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valmux = 0;
|
| 290 |
|
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dstReg = 0;
|
| 291 |
|
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src1Reg = 0;
|
| 292 |
|
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src2Reg = 0;
|
| 293 |
|
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sdx = 0;
|
| 294 |
|
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if(!memcmp(&hPtr->mnemo[sdx], "U", 1)) { // update flag after alu operation ?
|
| 295 |
|
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updateFlag = 1;
|
| 296 |
|
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sdx++;
|
| 297 |
|
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}
|
| 298 |
|
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////// scan condition code
|
| 299 |
|
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if(!memcmp(&hPtr->mnemo[sdx], "A", 1)) { // always
|
| 300 |
|
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ccMode = 0; sdx++;
|
| 301 |
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} else if(!memcmp(&hPtr->mnemo[sdx], "CC", 2)) { // carry clear
|
| 302 |
|
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ccMode = 1; sdx += 2;
|
| 303 |
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} else if(!memcmp(&hPtr->mnemo[sdx], "CS", 2)) { // carry set
|
| 304 |
|
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ccMode = 2; sdx += 2;
|
| 305 |
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} else if(!memcmp(&hPtr->mnemo[sdx], "EQ", 2)) { // equal
|
| 306 |
|
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ccMode = 3; sdx += 2;
|
| 307 |
|
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} else if(!memcmp(&hPtr->mnemo[sdx], "GE", 2)) { // greater equal
|
| 308 |
|
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ccMode = 4; sdx += 2;
|
| 309 |
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} else if(!memcmp(&hPtr->mnemo[sdx], "GT", 2)) { // greater than
|
| 310 |
|
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ccMode = 5; sdx += 2;
|
| 311 |
|
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} else if(!memcmp(&hPtr->mnemo[sdx], "HI", 2)) { // higher
|
| 312 |
|
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ccMode = 6; sdx += 2;
|
| 313 |
|
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} else if(!memcmp(&hPtr->mnemo[sdx], "LE", 2)) { // less equal
|
| 314 |
|
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ccMode = 7; sdx += 2;
|
| 315 |
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} else if(!memcmp(&hPtr->mnemo[sdx], "LS", 2)) { // less
|
| 316 |
|
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ccMode = 8; sdx += 2;
|
| 317 |
|
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} else if(!memcmp(&hPtr->mnemo[sdx], "LT", 2)) { // less than
|
| 318 |
|
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ccMode = 9; sdx += 2;
|
| 319 |
|
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} else if(!memcmp(&hPtr->mnemo[sdx], "MI", 2)) { // minus
|
| 320 |
|
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ccMode = 10; sdx += 2;
|
| 321 |
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} else if(!memcmp(&hPtr->mnemo[sdx], "NE", 2)) { // not equal
|
| 322 |
|
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ccMode = 11; sdx += 2;
|
| 323 |
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} else if(!memcmp(&hPtr->mnemo[sdx], "PL", 2)) { // plus
|
| 324 |
|
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ccMode = 12; sdx += 2;
|
| 325 |
|
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} else if(!memcmp(&hPtr->mnemo[sdx], "VC", 2)) { // overflow clear
|
| 326 |
|
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ccMode = 13; sdx += 2;
|
| 327 |
|
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} else if(!memcmp(&hPtr->mnemo[sdx], "VS", 2)) { // overflow set
|
| 328 |
|
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ccMode = 14; sdx += 2;
|
| 329 |
|
|
} else if(!memcmp(&hPtr->mnemo[sdx], "N", 1)) { // never
|
| 330 |
|
|
ccMode = 15; sdx++;
|
| 331 |
|
|
}
|
| 332 |
|
|
////// scan alu mode
|
| 333 |
|
|
if(!memcmp(&hPtr->mnemo[sdx], "MOV", 3)) { // mov
|
| 334 |
|
|
aluMode = 0;
|
| 335 |
|
|
} else if(!memcmp(&hPtr->mnemo[sdx], "AND", 3)) { // and
|
| 336 |
|
|
aluMode = 1;
|
| 337 |
|
|
} else if(!memcmp(&hPtr->mnemo[sdx], "OR", 2)) { // or
|
| 338 |
|
|
aluMode = 2;
|
| 339 |
|
|
} else if(!memcmp(&hPtr->mnemo[sdx], "XOR", 3)) { // xor
|
| 340 |
|
|
aluMode = 3;
|
| 341 |
|
|
} else if(!memcmp(&hPtr->mnemo[sdx], "ADD", 3)) { // add
|
| 342 |
|
|
aluMode = 4;
|
| 343 |
|
|
if(hPtr->mnemo[sdx+3] == 'C') carryUse = 1;
|
| 344 |
|
|
} else if(!memcmp(&hPtr->mnemo[sdx], "SUB", 3)) { // sub
|
| 345 |
|
|
aluMode = 5;
|
| 346 |
|
|
if(hPtr->mnemo[sdx+3] == 'C') carryUse = 1;
|
| 347 |
|
|
} else if(!memcmp(&hPtr->mnemo[sdx], "ROR", 3)) { // ror
|
| 348 |
|
|
aluMode = 6;
|
| 349 |
|
|
} else if(!memcmp(&hPtr->mnemo[sdx], "LSR", 3)) { // lsr
|
| 350 |
|
|
aluMode = 7;
|
| 351 |
|
|
} else if(!memcmp(&hPtr->mnemo[sdx], "LSRA", 4)) { // lsra
|
| 352 |
|
|
aluMode = 8;
|
| 353 |
|
|
} else if(!memcmp(&hPtr->mnemo[sdx], "SWAP", 4)) { // swap
|
| 354 |
|
|
aluMode = 9;
|
| 355 |
|
|
} else if(!memcmp(&hPtr->mnemo[sdx], "SWAPB", 5)) {// swapb
|
| 356 |
|
|
aluMode = 10;
|
| 357 |
|
|
} else if(!memcmp(&hPtr->mnemo[sdx], "INC", 3)) { // inc
|
| 358 |
|
|
aluMode = 11;
|
| 359 |
|
|
if(hPtr->mnemo[sdx+3] == 'C') carryUse = 1;
|
| 360 |
|
|
} else if(!memcmp(&hPtr->mnemo[sdx], "DEC", 3)) { // dec
|
| 361 |
|
|
aluMode = 12;
|
| 362 |
|
|
if(hPtr->mnemo[sdx+3] == 'C') carryUse = 1;
|
| 363 |
|
|
} else if(!memcmp(&hPtr->mnemo[sdx], "RORB", 4)) { // rorb
|
| 364 |
|
|
aluMode = 13;
|
| 365 |
|
|
}
|
| 366 |
|
|
////////////// destination operand
|
| 367 |
|
|
if(hPtr->operand1[0] == 0) {
|
| 368 |
|
|
hPtr = hPtr->next; // goto next line
|
| 369 |
|
|
fprintf(stderr, "%d destination operand missing\n", hPtr->linenumber);
|
| 370 |
|
|
continue;
|
| 371 |
|
|
}
|
| 372 |
|
|
sdx = 0;
|
| 373 |
|
|
if(hPtr->operand1[0] == '[') {
|
| 374 |
|
|
sdx++;
|
| 375 |
|
|
writeCycle = 1;
|
| 376 |
|
|
}
|
| 377 |
|
|
if(hPtr->operand1[sdx] != 'R') {
|
| 378 |
|
|
fprintf(stderr, "%d destination operand error\n", hPtr->linenumber);
|
| 379 |
|
|
} else {
|
| 380 |
|
|
if(!isdigit(hPtr->operand1[sdx+1])) {
|
| 381 |
|
|
fprintf(stderr, "%d destination operand number error\n", hPtr->linenumber);
|
| 382 |
|
|
} else {
|
| 383 |
|
|
dstReg = hPtr->operand1[sdx+1] - '0';
|
| 384 |
|
|
}
|
| 385 |
|
|
}
|
| 386 |
|
|
src1Reg = dstReg; // set default register
|
| 387 |
|
|
src2Reg = dstReg; // set default register, improve to opcode kontext register
|
| 388 |
|
|
//////////// source1 operand
|
| 389 |
|
|
if(hPtr->operand2[0]) {
|
| 390 |
|
|
sdx = 0;
|
| 391 |
|
|
if(hPtr->operand2[0] == '[') {
|
| 392 |
|
|
if(writeCycle) {
|
| 393 |
|
|
hPtr = hPtr->next; // goto next line
|
| 394 |
|
|
fprintf(stderr, "%d both memory accesses not supported\n", hPtr->linenumber);
|
| 395 |
|
|
continue;
|
| 396 |
|
|
}
|
| 397 |
|
|
sdx++;
|
| 398 |
|
|
memRead = 1;
|
| 399 |
|
|
}
|
| 400 |
|
|
if(hPtr->operand2[sdx] != 'R') { // immediate
|
| 401 |
|
|
if((hPtr->operand2[0] == '$') || isdigit(hPtr->operand2[0])) {
|
| 402 |
|
|
getvalue(hPtr->operand2, binTemp);
|
| 403 |
|
|
memcpy(hPtr->imm, &binTemp[128-g_wordSize/8], g_wordSize/8);
|
| 404 |
|
|
immediate = 1;
|
| 405 |
|
|
} else { // label
|
| 406 |
|
|
strcpy(hPtr->olabel2, hPtr->operand2);
|
| 407 |
|
|
}
|
| 408 |
|
|
} else {
|
| 409 |
|
|
if(!isdigit(hPtr->operand2[sdx+1])) {
|
| 410 |
|
|
fprintf(stderr, "%d source1 operand number error\n", hPtr->linenumber);
|
| 411 |
|
|
} else {
|
| 412 |
|
|
src1Reg = hPtr->operand2[sdx+1] - '0';
|
| 413 |
|
|
if(writeCycle) {
|
| 414 |
|
|
src2Reg = dstReg;
|
| 415 |
|
|
}
|
| 416 |
|
|
}
|
| 417 |
|
|
}
|
| 418 |
|
|
///////// source2 operand
|
| 419 |
|
|
if(hPtr->operand3[0] == 0) {
|
| 420 |
|
|
if(writeCycle == 0) {
|
| 421 |
|
|
src2Reg = src1Reg;
|
| 422 |
|
|
}
|
| 423 |
|
|
} else {
|
| 424 |
|
|
if(hPtr->operand3[0] != 'R') {
|
| 425 |
|
|
fprintf(stderr, "%d source2 operand number error\n", hPtr->linenumber);
|
| 426 |
|
|
continue;
|
| 427 |
|
|
} else {
|
| 428 |
|
|
if(!isdigit(hPtr->operand3[1])) {
|
| 429 |
|
|
fprintf(stderr, "%d source2 operand number error\n", hPtr->linenumber);
|
| 430 |
|
|
} else {
|
| 431 |
|
|
src2Reg = hPtr->operand3[1] - '0';
|
| 432 |
|
|
}
|
| 433 |
|
|
}
|
| 434 |
|
|
}
|
| 435 |
|
|
} // if(hPtr->operand2[0] == 0)
|
| 436 |
|
|
///////// build machine code
|
| 437 |
|
|
memset(hPtr->mcod, 0, sizeof(hPtr->mcod));
|
| 438 |
|
|
hPtr->mcod[0] = (ccMode << 4) | aluMode;
|
| 439 |
|
|
hPtr->mcod[1] = (memRead << 7) | (dstReg << 4) | (writeCycle << 3) | src1Reg;
|
| 440 |
|
|
hPtr->mcod[2] = (immediate << 7) | (src2Reg << 4) | (updateFlag << 3) | (carryUse << 2);
|
| 441 |
|
|
idx = g_wordSize / 8;
|
| 442 |
|
|
memcpy(&hPtr->mcod[3], &hPtr->imm[3], idx-3);
|
| 443 |
|
|
addr++; // goto next program address
|
| 444 |
|
|
hPtr = hPtr->next; // goto next line
|
| 445 |
|
|
}
|
| 446 |
|
|
/////////// count label addresses ///////////////////////
|
| 447 |
|
|
hPtr = head;
|
| 448 |
|
|
maxi = 0;
|
| 449 |
|
|
while(hPtr) {
|
| 450 |
|
|
if(hPtr->label[0]) maxi++;
|
| 451 |
|
|
hPtr = hPtr->next;
|
| 452 |
|
|
}
|
| 453 |
|
|
/////////// table with label address ////////////////////
|
| 454 |
|
|
address = (Taddress *) malloc(maxi * sizeof(Taddress));
|
| 455 |
|
|
hPtr = head;
|
| 456 |
|
|
idx = 0;
|
| 457 |
|
|
while(hPtr) {
|
| 458 |
|
|
if(hPtr->label[0]) {
|
| 459 |
|
|
address[idx].addr = hPtr->addr;
|
| 460 |
|
|
strcpy(address[idx].label, hPtr->label);
|
| 461 |
|
|
idx++;
|
| 462 |
|
|
}
|
| 463 |
|
|
hPtr = hPtr->next;
|
| 464 |
|
|
}
|
| 465 |
|
|
|
| 466 |
|
|
printf("2nd pass\n");
|
| 467 |
|
|
/////////// 2nd pass ////////////////////////////////////
|
| 468 |
|
|
hPtr = head;
|
| 469 |
|
|
while(hPtr) {
|
| 470 |
|
|
if(hPtr->olabel2[0]) { // resolve label, treated as immediate operand
|
| 471 |
|
|
for(idx=0; idx
|
| 472 |
|
|
if(!strcmp(address[idx].label, hPtr->olabel2)) {
|
| 473 |
|
|
hPtr->mcod[2] |= 0x80; // set immediate operand flag
|
| 474 |
|
|
jdx = g_wordSize / 8;
|
| 475 |
|
|
switch(jdx) {
|
| 476 |
|
|
case 4:
|
| 477 |
|
|
hPtr->mcod[3] = (unsigned char) address[idx].addr;
|
| 478 |
|
|
break;
|
| 479 |
|
|
case 5:
|
| 480 |
|
|
hPtr->mcod[3] = (unsigned char) (address[idx].addr >> 8);
|
| 481 |
|
|
hPtr->mcod[4] = (unsigned char) address[idx].addr;
|
| 482 |
|
|
break;
|
| 483 |
|
|
case 6:
|
| 484 |
|
|
hPtr->mcod[3] = (unsigned char) (address[idx].addr >> 16);
|
| 485 |
|
|
hPtr->mcod[4] = (unsigned char) (address[idx].addr >> 8);
|
| 486 |
|
|
hPtr->mcod[5] = (unsigned char) address[idx].addr;
|
| 487 |
|
|
break;
|
| 488 |
|
|
default:
|
| 489 |
|
|
jdx -= 4;
|
| 490 |
|
|
hPtr->mcod[jdx++] = (unsigned char) (address[idx].addr >> 24);
|
| 491 |
|
|
hPtr->mcod[jdx++] = (unsigned char) (address[idx].addr >> 16);
|
| 492 |
|
|
hPtr->mcod[jdx++] = (unsigned char) (address[idx].addr >> 8);
|
| 493 |
|
|
hPtr->mcod[jdx++] = (unsigned char) address[idx].addr;
|
| 494 |
|
|
}
|
| 495 |
|
|
break;
|
| 496 |
|
|
}
|
| 497 |
|
|
}
|
| 498 |
|
|
if(idx == maxi) {
|
| 499 |
|
|
fprintf(stderr, "%d unknown label\n", hPtr->linenumber);
|
| 500 |
|
|
}
|
| 501 |
|
|
}
|
| 502 |
|
|
hPtr = hPtr->next;
|
| 503 |
|
|
}
|
| 504 |
|
|
|
| 505 |
|
|
////////// output ///////////////////////////////////////
|
| 506 |
|
|
fp = fopen(filename, "w"); // write into Intel HEX file
|
| 507 |
|
|
if(NULL == fp) {
|
| 508 |
|
|
fprintf(stderr, "can't write to %s\n", filename);
|
| 509 |
|
|
return 0;
|
| 510 |
|
|
}
|
| 511 |
|
|
hPtr = head;
|
| 512 |
|
|
maxi = g_wordSize / 8;
|
| 513 |
|
|
while(hPtr) {
|
| 514 |
|
|
if(hPtr->linenumber < 0) {
|
| 515 |
|
|
hPtr = hPtr->next;
|
| 516 |
|
|
continue;
|
| 517 |
|
|
}
|
| 518 |
|
|
/*
|
| 519 |
|
|
printf("%04X ", hPtr->addr);
|
| 520 |
|
|
for(idx=0; idxmcod[idx]);
|
| 521 |
|
|
printf("<%s><%s><%s><%s><%s>\n", hPtr->label, hPtr->mnemo, hPtr->operand1, hPtr->operand2, hPtr->operand3);
|
| 522 |
|
|
*/
|
| 523 |
|
|
|
| 524 |
|
|
if(maxi) {
|
| 525 |
|
|
sprintf(line, ":%02X%04X00", maxi, hPtr->addr);
|
| 526 |
|
|
for(idx=0; idx
|
| 527 |
|
|
sprintf(tmpStr, "%02X", hPtr->mcod[idx]);
|
| 528 |
|
|
strcat(line, tmpStr);
|
| 529 |
|
|
}
|
| 530 |
|
|
chksum = 0;
|
| 531 |
|
|
for(idx=1; line[idx]; idx += 2) {
|
| 532 |
|
|
msn = line[idx] - '0';
|
| 533 |
|
|
if(msn > 9) msn -= 7;
|
| 534 |
|
|
lsn = line[idx+1] - '0';
|
| 535 |
|
|
if(lsn > 9) lsn -= 7;
|
| 536 |
|
|
chksum += ((msn<<4) + lsn);
|
| 537 |
|
|
}
|
| 538 |
|
|
chksum = 256 - chksum;
|
| 539 |
|
|
sprintf(tmpStr, "%02X", chksum);
|
| 540 |
|
|
strcat(line, tmpStr);
|
| 541 |
|
|
fprintf(fp, "%s\015\012", line);
|
| 542 |
|
|
}
|
| 543 |
|
|
hPtr = hPtr->next;
|
| 544 |
|
|
}
|
| 545 |
|
|
fprintf(fp, ":00000001FF\015\012"); // end of HEX file
|
| 546 |
|
|
fclose(fp);
|
| 547 |
|
|
return 0;
|
| 548 |
|
|
}
|
| 549 |
|
|
|
| 550 |
|
|
////////// gets a decimal or hexadecimal value
|
| 551 |
|
|
// decimal is ddd
|
| 552 |
|
|
// hexadecimal is $hhh
|
| 553 |
|
|
// returns ptr after value
|
| 554 |
|
|
char *getvalue(char *str, unsigned char *val)
|
| 555 |
|
|
{
|
| 556 |
|
|
int idx, jdx, kdx, radix, cy;
|
| 557 |
|
|
unsigned short temp[128];
|
| 558 |
|
|
unsigned short help[128];
|
| 559 |
|
|
|
| 560 |
|
|
memset(temp, 0, sizeof(temp));
|
| 561 |
|
|
memset(help, 0, sizeof(help));
|
| 562 |
|
|
radix = 10;
|
| 563 |
|
|
if(str[0] == '$') radix = 16;
|
| 564 |
|
|
if(radix == 10) {
|
| 565 |
|
|
for(idx=0; str[idx]; idx++) {
|
| 566 |
|
|
if(!isdigit(str[idx])) break;
|
| 567 |
|
|
cy = 0;
|
| 568 |
|
|
for(jdx=127; jdx >=0; jdx--) { // shift left
|
| 569 |
|
|
temp[jdx] <<= 1;
|
| 570 |
|
|
if(cy) temp[jdx]++;
|
| 571 |
|
|
cy = 0;
|
| 572 |
|
|
if(temp[jdx] > 255) {
|
| 573 |
|
|
cy++;
|
| 574 |
|
|
temp[jdx] &= 255;
|
| 575 |
|
|
}
|
| 576 |
|
|
}
|
| 577 |
|
|
memcpy(help, temp, sizeof(help));
|
| 578 |
|
|
for(kdx=0; kdx<2; kdx++) {
|
| 579 |
|
|
cy = 0;
|
| 580 |
|
|
for(jdx=127; jdx >=0; jdx--) { // shift left
|
| 581 |
|
|
temp[jdx] <<= 1;
|
| 582 |
|
|
if(cy) temp[jdx]++;
|
| 583 |
|
|
cy = 0;
|
| 584 |
|
|
if(temp[jdx] > 255) {
|
| 585 |
|
|
cy++;
|
| 586 |
|
|
temp[jdx] &= 255;
|
| 587 |
|
|
}
|
| 588 |
|
|
}
|
| 589 |
|
|
}
|
| 590 |
|
|
cy = 0;
|
| 591 |
|
|
for(jdx=127; jdx >=0; jdx--) { // add
|
| 592 |
|
|
temp[jdx] += help[jdx];
|
| 593 |
|
|
if(cy) temp[jdx]++;
|
| 594 |
|
|
cy = 0;
|
| 595 |
|
|
if(temp[jdx] > 255) {
|
| 596 |
|
|
cy++;
|
| 597 |
|
|
temp[jdx] &= 255;
|
| 598 |
|
|
}
|
| 599 |
|
|
}
|
| 600 |
|
|
temp[127] += (str[idx] - '0');
|
| 601 |
|
|
cy = 0;
|
| 602 |
|
|
if(temp[127] > 255) {
|
| 603 |
|
|
cy++;
|
| 604 |
|
|
temp[127] &= 255;
|
| 605 |
|
|
}
|
| 606 |
|
|
for(jdx=126; jdx >=0; jdx--) {
|
| 607 |
|
|
temp[jdx] += cy;
|
| 608 |
|
|
cy = 0;
|
| 609 |
|
|
if(temp[jdx] > 255) {
|
| 610 |
|
|
cy++;
|
| 611 |
|
|
temp[jdx] &= 255;
|
| 612 |
|
|
}
|
| 613 |
|
|
}
|
| 614 |
|
|
} // end for
|
| 615 |
|
|
} else {
|
| 616 |
|
|
for(idx=1; str[idx]; idx++) {
|
| 617 |
|
|
if(!isxdigit(str[idx])) break;
|
| 618 |
|
|
for(jdx=0; jdx<127; jdx++) { // shift 4 bits left
|
| 619 |
|
|
temp[jdx] <<= 4;
|
| 620 |
|
|
temp[jdx] |= (15 & (temp[jdx+1] >> 4));
|
| 621 |
|
|
}
|
| 622 |
|
|
temp[127] <<= 4;
|
| 623 |
|
|
jdx = str[idx] - '0';
|
| 624 |
|
|
if(jdx > 9) jdx -= 7;
|
| 625 |
|
|
temp[127] |= jdx;
|
| 626 |
|
|
} // end for
|
| 627 |
|
|
}
|
| 628 |
|
|
for(idx=128-(g_wordSize/8); idx<128; idx++) {
|
| 629 |
|
|
val[idx] = temp[idx];
|
| 630 |
|
|
}
|
| 631 |
|
|
return &str[idx];
|
| 632 |
|
|
}
|
