84 lines
1.8 KiB
C
84 lines
1.8 KiB
C
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#include <stdio.h>
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/* MAKECLASSDEF
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*
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* This program is used by several phases of the optimizer
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* to make the file classdefs.h. It reads two files:
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* - the em_mnem,h file, containing the definitions of the
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* EM mnemonics
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* - the class-file, containing tuples:
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* (mnemonic, src_class, res_class)
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* where src_class and res_class are integers telling how
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* to compute the number of bytes popped and pushed
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* by the instruction.
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* The output (standard output) is a C array.
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*/
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#define TRUE 1
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#define FALSE 0
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convert(mnemfile,classfile)
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FILE *mnemfile, *classfile;
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{
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char mnem1[10], mnem2[10],def[10];
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int src,res,newcl,opc;
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newcl = TRUE;
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printf("struct class classtab[] = {\n");
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printf("\tNOCLASS,\tNOCLASS,\n");
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/* EM mnemonics start at 1, arrays in C at 0 */
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for (;;) {
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fscanf(mnemfile,"%s%s%d",def,mnem1,&opc);
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/* read a line like "#define op_aar 1" */
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if (feof(mnemfile)) break;
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if (strcmp(def,"#define") != 0) {
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error("bad mnemonic file, #define expected");
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}
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if (newcl) {
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fscanf(classfile,"%s%d%d",mnem2,&src,&res);
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/* read a line like "op_loc 8 1" */
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}
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if (feof(classfile) || strcmp(mnem1,mnem2) != 0) {
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/* there is no line for this mnemonic, so
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* it has no class.
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*/
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printf("\tNOCLASS,\tNOCLASS,\n");
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newcl = FALSE;
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} else {
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printf("\tCLASS%d,\t\tCLASS%d,\n",src,res);
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/* print a line like "CLASS8, CLASS1," */
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newcl = TRUE;
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}
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}
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printf("};\n");
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}
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error(s)
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char *s;
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{
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fprintf(stderr,"%s\n",s);
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exit(-1);
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}
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main(argc,argv)
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int argc;
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char *argv[];
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{
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FILE *f1,*f2;
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if (argc != 3) {
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error("usage: makeclassdef mnemfile classfile");
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}
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if ((f1 = fopen(argv[1],"r")) == NULL) {
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error("cannot open mnemonic file");
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}
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if ((f2 = fopen(argv[2],"r")) == NULL) {
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error("cannot open class file");
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}
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convert(f1,f2);
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}
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