148 lines
2.6 KiB
C
148 lines
2.6 KiB
C
/* mach.c file for ARM backend */
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#define MAXREGVARS 4 /* Max num of register variables*/
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struct reg_stuff
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{
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char *name;
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long offset;
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}
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reg [MAXREGVARS]; /* array of reg var details */
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char regnames[6*MAXREGVARS]; /* comma-delimited list of regs */
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int n_regs; /* current number of reg vars */
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char *segname[] = {
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".sect .text",
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".sect .data",
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".sect .data",
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".sect .bss"
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};
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con_part(sz, w)
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register int sz;
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word w;
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{
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while (part_size % sz) part_size++;
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if (part_size == TEM_WSIZE)
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part_flush();
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if (sz == 1 || sz == 2) {
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w &= (sz == 1 ? 0xFF : 0xFFFF);
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w <<= 8 * part_size;
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part_word |= w;
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} else {
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assert(sz == 4);
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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)
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word sz;
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{
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if (sz != 4)
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fatal("bad icon/ucon size");
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fprintf(codefile,".long\t%s\n",str);
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}
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regscore (offset, size, type, score, totype)
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long offset;
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{
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if (size > 4) /* only consider register-sized */
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return -1; /* variables */
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if (score < 2) return -1;
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/* give greater preference to locals */
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if (offset >= 0) score *= 4; else score *= 8;
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return score;
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}
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i_regsave()
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{
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n_regs = 0;
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*regnames = '\0';
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}
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regsave(name, offset, size)
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char *name;
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long offset;
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{
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if (n_regs > 0) /* if its not the first item */
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strcat(regnames, ","); /* prefix it with a comma */
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strcat(regnames, name); /* add to list of names to save */
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reg[n_regs].name = name; /* and add to array of reg vars */
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reg[n_regs++].offset = offset;
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}
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f_regsave()
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{
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int i;
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long n;
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char *q;
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if (n_regs > 0)
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fprintf(codefile, "STMFD R12<,{%s}\n", regnames);
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for (i = 0; i < n_regs; i++) { /* load their new values */
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n = reg[i].offset;
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q = reg[i].name;
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if (n > 0) /* only proc parameters */
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fprintf(codefile, "LDR %s,[R13,#%ld]\n", q, n);
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}
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}
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regreturn()
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{
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if (n_regs > 0)
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fprintf(codefile, "LDMFD R12<,{%s}\n", regnames);
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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,".define %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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prolog(nlocals) full nlocals;
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{
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fprintf(codefile, "STMFD R12<,{R13,R14}\n");
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fprintf(codefile, "MOV R13,R12\n");
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if (nlocals)
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fprintf(codefile, "SUB R12,R12,#%d\n", nlocals);
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return;
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}
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#define CODE_GENERATOR
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#define IEEEFLOAT
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#define FL_MSL_AT_LOW_ADDRESS 0
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#define FL_MSW_AT_LOW_ADDRESS 0
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#define FL_MSB_AT_LOW_ADDRESS 0
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#include <con_float>
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