ack/lang/occam/comp/em.c

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/* $Header$ */
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/*
* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
* See the copyright notice in the ACK home directory, in the file "Copyright".
*/
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#include "sizes.h"
#include "Lpars.h"
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#include <em.h>
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#include "em.h"
/* This file is used to shield code.c as much as possible from em dependant
* details. It introduces some call overhead but not enough for a coffee
* break. (Sorry)
* Note that functions with a leading upper case letter normally decide between
* word or double word arith.
*/
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int wz = 4, pz = 4, vz = 4;
int Lflag;
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static Lab=0;
char *Malloc();
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void init()
{
C_init((arith) wz, (arith) pz);
}
void openfile(file) char *file;
{
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if (C_open(file) < 0) {
fatal("Could not open output file");
}
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}
void meswp()
{
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C_ms_emx((arith) wz, (arith) pz);
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}
void maxdes()
{
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long max = (1L << (8*wz-1)) - 1;
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C_df_dnam("maxcdes");
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rom(wz, 0L); rom(wz, max); rom(wz, (long) (wz+vz));
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C_df_dnam("maxwdes");
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rom(wz, 0L); rom(wz, max); rom(wz, (long) vz);
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C_df_dnam("maxbdes");
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rom(wz, 0L); rom(wz, max); rom(wz, 1L);
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}
int new_label(L) register *L;
{
if (*L==0) *L= ++Lab;
return *L;
}
void Label(L) register L;
{
if (L!=0) C_df_ilb((label) L);
}
static Dot_label=0;
int new_dot_label(L) int *L;
{
return *L= ++Dot_label;
}
void dot_label(L) int L;
{
C_df_dlb((label) L);
}
void branch(L) int *L;
{
C_bra((label) new_label(L));
}
char *proc_label(L, name) register L; register char *name;
{
static char *lab=nil;
register char *n;
if (lab!=nil) free(lab);
lab=Malloc(strlen(name)+(1+sizeof(int)*3+1));
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/* That is: P<L><name>\0 */
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sprint(lab, "P%d", L);
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n=lab+strlen(lab);
while (*name!=0) {
*n++ = *name=='.' ? '_' : *name;
name++;
}
*n=0;
return lab;
}
void magic() /* magic? should be called invisible */
{
C_magic();
}
void cwv()
{
if (vz>wz) {
C_loc((arith) wz);
C_loc((arith) vz);
C_cii();
}
}
void cvw()
{
if (vz>wz) {
C_loc((arith) vz);
C_loc((arith) wz);
C_cii();
}
}
void Loc(const) long const;
{
if (vz>wz) C_ldc((arith) const); else C_loc((arith) const);
}
void Lol(offset) int offset;
{
if (vz>wz) C_ldl((arith) offset); else C_lol((arith) offset);
}
void Lolp(offset) int offset;
{
if (pz>wz) C_ldl((arith) offset); else C_lol((arith) offset);
}
void Lil(offset) register offset;
{
if (vz>wz) {
Lolp(offset);
C_loi((arith) vz);
} else
C_lil((arith) offset);
}
void Lof(offset) int offset;
{
if (vz>wz) C_ldf((arith) offset); else C_lof((arith) offset);
}
void Lofp(offset) int offset;
{
if (pz>wz) C_ldf((arith) offset); else C_lof((arith) offset);
}
void Lif(offset) register offset;
{
Lofp(offset);
C_loi((arith) vz);
}
void Stl(offset) int offset;
{
if (vz>wz) C_sdl((arith) offset); else C_stl((arith) offset);
}
void Inl(offset) register offset;
{
if (vz>wz) {
C_ldl((arith) offset);
C_ldc((arith) 1);
C_adi((arith) vz);
C_sdl((arith) offset);
} else
C_inl((arith) offset);
}
void Del(offset) register offset;
{
if (vz>wz) {
C_ldl((arith) offset);
C_ldc((arith) 1);
C_sbi((arith) vz);
C_sdl((arith) offset);
} else
C_del((arith) offset);
}
void Loe(name, offset) char *name; int offset;
{
if (vz>wz)
C_lde_dnam(name, (arith) offset);
else
C_loe_dnam(name, (arith) offset);
}
static int operators[]= { '<', '>', '=', GE, LE, NE };
void bxx(pos, op, L) register pos, op, L;
{
register i;
if (op==AFTER) {
C_sbi((arith) vz);
if (vz>wz) {
C_ldc((arith) 0);
C_cmi((arith) vz);
}
if (pos) C_zle((label) L); else C_zgt((label) L);
} else {
for (i=0; operators[i]!=op; i++) ;
if (pos && (i+=3)>=6) i-=6;
if (vz>wz) {
C_cmi((arith) vz);
switch(i) {
case 0:
C_zlt((label) L);
break;
case 1:
C_zgt((label) L);
break;
case 2:
C_zeq((label) L);
break;
case 3:
C_zge((label) L);
break;
case 4:
C_zle((label) L);
break;
case 5:
C_zne((label) L);
break;
}
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} else {
switch(i) {
case 0:
C_blt((label) L);
break;
case 1:
C_bgt((label) L);
break;
case 2:
C_beq((label) L);
break;
case 3:
C_bge((label) L);
break;
case 4:
C_ble((label) L);
break;
case 5:
C_bne((label) L);
break;
}
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}
}
}
void Txx(op) register int op;
{
switch(op) {
case '<':
C_tlt();
break;
case '>':
C_tgt();
break;
case '=':
C_teq();
break;
case GE:
C_tge();
break;
case LE:
C_tle();
break;
case NE:
C_tne();
break;
}
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cwv();
C_ngi((arith) vz);
}
void xxi(op) register op;
{
switch(op) {
case '+':
C_adi((arith) vz);
break;
case '-':
C_sbi((arith) vz);
break;
case '*':
C_mli((arith) vz);
break;
case '/':
C_dvi((arith) vz);
break;
case BS:
C_rmi((arith) vz);
break;
}
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}
void aar() { C_aar((arith) wz); }
void adp(offset) int offset; { C_adp((arith) offset); }
void and() { C_and((arith) vz); }
void asp(size) int size; { C_asp((arith) size); }
void blm(size) int size; { C_blm((arith) size); }
void blt(lab) int lab; { C_blt((label) lab); }
void cal(lab) char *lab; { C_cal(lab); }
void cmi() { C_cmi((arith) vz); }
void com() { C_com((arith) vz); }
void del(offset) int offset; { C_del((arith) offset); }
void x_end(size) int size; { C_end((arith) size); }
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void exp(lab) char *lab; { C_exp(lab); }
void ior() { C_ior((arith) vz); }
void lae(lab, offset) char *lab; int offset;
{ C_lae_dnam(lab, (arith) offset); }
void laedot(lab) int lab; { C_lae_dlb((label) lab, (arith) 0); }
void lal(offset) int offset; { C_lal((arith) offset); }
void lar() { C_lar((arith) wz); }
void ldc0() { C_ldc((arith) 0); }
void ldl(offset) int offset; { C_ldl((arith) offset); }
void lfr(size) int size; { C_lfr((arith) size); }
void loc(cst) int cst; { C_loc((arith) cst); }
void loi(size) int size; { C_loi((arith) size); }
void lol(offset) int offset; { C_lol((arith) offset); }
void lor0() { C_lor((arith) 0); }
void lxa(offset) int offset; { C_lxa((arith) offset); }
void lxl(offset) int offset; { C_lxl((arith) offset); }
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void meserr() { C_ms_err(); }
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void ngi() { C_ngi((arith) vz); }
void pro(lab) char *lab; { C_pro_narg(lab); }
void ret(size) int size; { C_ret((arith) size); }
void init_rt() { C_cal("init"); }
void sli() { C_sli((arith) vz); }
void sri() { C_sri((arith) vz); }
void ste(lab, offset) char *lab; int offset;
{ C_ste_dnam(lab, (arith) offset); }
void sti(size) int size; { C_sti((arith) size); }
void stl(offset) int offset; { C_stl((arith) offset); }
void trp() { C_trp(); }
void tst() { /* No flags in EM */ }
void xor() { C_xor((arith) vz); }
void zeq(lab) int lab; { C_zeq((label) lab); }
void zgt(lab) int lab; { C_zgt((label) lab); }
void zlt(lab) int lab; { C_zlt((label) lab); }
void zne(lab) int lab; { C_zne((label) lab); }
char *itoa(i) long i;
{
static char a[sizeof(long)*3];
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sprint(a, "%ld", i);
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return a;
}
void rom(size, c) int size; long c;
{
C_rom_icon(itoa(c), (arith) size);
}
void lin()
{
static oldline=0;
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extern lineno;
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if (Lflag) return;
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if (lineno!=oldline)
C_lin((arith) (oldline=lineno));
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}
static struct ftree {
char *file;
int lab;
struct ftree *left, *right;
} std_f = { "stdin", 0, nil, nil }, *curr_f= &std_f, *main_f=nil;
char *curr_file="stdin";
static void do_fil(f) struct ftree *f;
{
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if (Lflag) return;
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if (f->lab==0) {
dot_label(new_dot_label(&f->lab));
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C_rom_scon(f->file, (arith) (strlen(f->file)+1));
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}
C_fil_dlb((label) f->lab, (arith) 0);
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}
void fil()
{
do_fil(curr_f);
}
void main_fil()
{
do_fil(main_f==nil ? &std_f : main_f);
}
int set_file(f) char *f;
{
char *strcpy();
static struct ftree *ftop=nil;
register struct ftree *pf, **apf= &ftop;
register cmp;
while ((pf= *apf)!=nil && (cmp=strcmp(f, pf->file))!=0)
apf= cmp<0 ? &pf->left : &pf->right;
if (pf==nil) {
*apf= pf= (struct ftree *) Malloc(sizeof *pf);
pf->file=strcpy(Malloc(strlen(f)+1), f);
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pf->lab=0;
pf->left=pf->right=nil;
}
curr_f=pf;
curr_file=pf->file;
if (main_f==nil) {
main_f=curr_f;
return 0;
} else
return curr_f!=main_f;
}
void par_begin()
{
C_zer((arith) pz);
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C_lal((arith) curr_offset);
C_cal("pc_begin");
C_asp((arith) (2*pz));
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}
void par_fork(NONZERO) int *NONZERO;
{
C_zer((arith) pz);
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C_cal("pc_fork");
C_asp((arith) pz);
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C_lfr((arith) wz);
C_zne((label) new_label(NONZERO));
}
void resumenext()
{
C_cal("resumenext");
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}
void no_deadlock()
{
C_zre_dnam("deadlock", (arith) 0);
}
void par_end()
{
C_cal("parend");
}
void closefile()
{
C_close();
}