172 lines
3.1 KiB
C
172 lines
3.1 KiB
C
#ifndef NORCSID
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static char rcsid[] = "$Header$";
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#endif
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/*
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* (c) copyright 1983 by the Vrije Universiteit, Amsterdam, The Netherlands.
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*
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* This product is part of the Amsterdam Compiler Kit.
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*
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* Permission to use, sell, duplicate or disclose this software must be
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* obtained in writing. Requests for such permissions may be sent to
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*
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* Dr. Andrew S. Tanenbaum
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* Wiskundig Seminarium
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* Vrije Universiteit
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* Postbox 7161
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* 1007 MC Amsterdam
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* The Netherlands
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*
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* Author: Hans van Staveren
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*/
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/*
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* machine dependent back end routines for the PDP-11
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*/
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/* #define REGPATCH /* save all registers in markblock */
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con_part(sz,w) register sz; word w; {
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while (part_size % sz)
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part_size++;
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if (part_size == EM_WSIZE)
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part_flush();
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if (sz == 1) {
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w &= 0xFF;
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if (part_size)
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w <<= 8;
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part_word |= w;
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} else {
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assert(sz == 2);
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part_word = w;
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}
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part_size += sz;
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}
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con_mult(sz) word sz; {
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long l;
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if (sz != 4)
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fatal("bad icon/ucon size");
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l = atol(str);
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fprintf(codefile,"\t%o;%o\n",(int)(l>>16),(int)l);
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}
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con_float() {
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double f;
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register short *p,i;
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if (argval != 4 && argval != 8)
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fatal("bad fcon size");
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f = atof(str);
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p = (short *) &f;
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i = *p++;
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if (argval == 8) {
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fprintf(codefile,"\t%o;%o;",i,*p++);
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i = *p++;
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}
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fprintf(codefile,"\t%o;%o\n",i,*p++);
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}
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#ifdef REGVARS
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char Rstring[10] = "RT";
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regscore(off,size,typ,score,totyp) long off; {
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if (size != 2)
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return(-1);
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score -= 1; /* allow for save/restore */
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if (off>=0)
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score -= 2;
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if (typ==reg_pointer)
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score *= 17;
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else if (typ==reg_loop)
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score = 10*score+50; /* Guestimate */
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else
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score *= 10;
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return(score); /* estimated # of words of profit */
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}
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i_regsave() {
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Rstring[2] = 0;
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}
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f_regsave() {}
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regsave(regstr,off,size) char *regstr; long off; {
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fprintf(codefile,"/ Local %ld into %s\n",off,regstr);
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#ifndef REGPATCH
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fprintf(codefile,"mov %s,-(sp)\n",regstr);
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#endif
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strcat(Rstring,regstr);
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if (off>=0)
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fprintf(codefile,"mov 0%lo(r5),%s\n",off,regstr);
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}
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regreturn() {
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#ifdef REGPATCH
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fprintf(codefile,"jmp eret\n");
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#else
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fprintf(codefile,"jmp %s\n",Rstring);
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#endif
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}
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#endif
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prolog(nlocals) full nlocals; {
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#ifdef REGPATCH
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fprintf(codefile,"mov r2,-(sp)\nmov r4,-(sp)\n");
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#endif
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fprintf(codefile,"mov r5,-(sp)\nmov sp,r5\n");
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if (nlocals == 0)
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return;
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if (nlocals == 2)
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fprintf(codefile,"tst -(sp)\n");
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else
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fprintf(codefile,"sub $0%o,sp\n",nlocals);
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}
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dlbdlb(as,ls) string as,ls; {
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if (strlen(as)+strlen(ls)+2<sizeof(labstr)) {
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strcat(ls,":");
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strcat(ls,as);
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} else
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fatal("too many consecutive labels");
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}
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mes(type) word type; {
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int argt ;
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switch ( (int)type ) {
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case ms_ext :
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for (;;) {
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switch ( argt=getarg(
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ptyp(sp_cend)|ptyp(sp_pnam)|sym_ptyp) ) {
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case sp_cend :
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return ;
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default:
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strarg(argt) ;
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fprintf(codefile,".globl %s\n",argstr) ;
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break ;
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}
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}
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default :
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while ( getarg(any_ptyp) != sp_cend ) ;
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break ;
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}
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}
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char *segname[] = {
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".text", /* SEGTXT */
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".data", /* SEGCON */
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".data", /* SEGROM */
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".bss" /* SEGBSS */
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};
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