/* Id: code.c,v 1.8 2015/09/03 19:24:51 ragge Exp */
/* $NetBSD: code.c,v 1.1.1.5 2016/02/09 20:28:27 plunky Exp $ */
/*
* Copyright (c) 2003 Anders Magnusson (ragge@ludd.luth.se).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
# include "pass1.h"
#define NODE P1ND
#undef NIL
#define NIL NULL
#define talloc p1alloc
/*
* Print out assembler segment name.
*/
void
setseg(int seg, char *name)
{
switch (seg) {
case PROG: name = ".text"; break;
case DATA:
case LDATA: name = ".data"; break;
case UDATA: break;
case STRNG:
case RDATA: name = ".rodata"; break;
default:
cerror("setseg");
}
printf("\t%s\n", name);
}
void
defalign(int al)
{
if (al > ALCHAR)
printf(".even\n");
}
/*
* Define everything needed to print out some data (or text).
* This means segment, alignment, visibility, etc.
*/
void
defloc(struct symtab *sp)
{
static char *loctbl[] = { "text", "data", "data" };
TWORD t;
char *n;
int s;
t = sp->stype;
s = ISFTN(t) ? PROG : ISCON(cqual(t, sp->squal)) ? RDATA : DATA;
if (s != lastloc)
printf(" .%s\n", loctbl[s]);
lastloc = s;
n = sp->soname ? sp->soname : exname(sp->sname);
if (sp->sclass == EXTDEF)
printf(" .globl %s\n", n);
if (sp->slevel == 0) {
printf("%s:\n", n);
} else {
printf(LABFMT ":\n", sp->soffset);
}
}
/*
* code for the end of a function
* deals with struct return here
*/
void
efcode(void)
{
NODE *p, *q;
if (cftnsp->stype != STRTY+FTN && cftnsp->stype != UNIONTY+FTN)
return;
/* Create struct assignment */
q = block(OREG, NIL, NIL, PTR+STRTY, 0, cftnsp->sap);
q->n_rval = R5;
q->n_lval = 8; /* return buffer offset */
q = buildtree(UMUL, q, NIL);
p = block(REG, NIL, NIL, PTR+STRTY, 0, cftnsp->sap);
p = buildtree(UMUL, p, NIL);
p = buildtree(ASSIGN, q, p);
ecomp(p);
}
/*
* code for the beginning of a function; a is an array of
* indices in symtab for the arguments; n is the number
*/
void
bfcode(struct symtab **sp, int cnt)
{
struct symtab *sp2;
NODE *n;
int i;
if (cftnsp->stype == STRTY+FTN || cftnsp->stype == UNIONTY+FTN) {
/* Function returns struct, adjust arg offset */
for (i = 0; i < cnt; i++)
sp[i]->soffset += SZPOINT(INT);
}
if (xtemps == 0)
return;
/* put arguments in temporaries */
for (i = 0; i < cnt; i++) {
if (sp[i]->stype == STRTY || sp[i]->stype == UNIONTY ||
cisreg(sp[i]->stype) == 0)
continue;
sp2 = sp[i];
n = tempnode(0, sp[i]->stype, sp[i]->sdf, sp[i]->sap);
n = buildtree(ASSIGN, n, nametree(sp2));
sp[i]->soffset = regno(n->n_left);
sp[i]->sflags |= STNODE;
ecomp(n);
}
}
/* called just before final exit */
/* flag is 1 if errors, 0 if none */
void
ejobcode(int flag)
{
}
void
bjobcode(void)
{
}
/*
* Called with a function call with arguments as argument.
* This is done early in buildtree() and only done once.
* Returns p.
*/
NODE *
funcode(NODE *p)
{
NODE *r, *l;
/* Fix function call arguments. On x86, just add funarg */
for (r = p->n_right; r->n_op == CM; r = r->n_left) {
if (r->n_right->n_op != STARG)
r->n_right = block(FUNARG, r->n_right, NIL,
r->n_right->n_type, r->n_right->n_df,
r->n_right->n_ap);
}
if (r->n_op != STARG) {
l = talloc();
*l = *r;
r->n_op = FUNARG;
r->n_left = l;
r->n_type = l->n_type;
}
return p;
}
/* fix up type of field p */
void
fldty(struct symtab *p)
{
}
/*
* XXX - fix genswitch.
*/
int
mygenswitch(int num, TWORD type, struct swents **p, int n)
{
return 0;
}
/*
* Return "canonical frame address".
*/
NODE *
builtin_cfa(const struct bitable *bt, NODE *a)
{
uerror(__func__);
return bcon(0);
}
NODE *
builtin_return_address(const struct bitable *bt, NODE *a)
{
uerror(__func__);
return bcon(0);
}
NODE *
builtin_frame_address(const struct bitable *bt, NODE *a)
{
uerror(__func__);
return bcon(0);
}
NODE *
builtin_huge_val(const struct bitable *bt, NODE *a)
{
uerror(__func__);
return bcon(0);
}
NODE *
builtin_huge_valf(const struct bitable *bt, NODE *a)
{
uerror(__func__);
return bcon(0);
}
NODE *
builtin_huge_vall(const struct bitable *bt, NODE *a)
{
uerror(__func__);
return bcon(0);
}
NODE *
builtin_inf(const struct bitable *bt, NODE *a)
{
uerror(__func__);
return bcon(0);
}
NODE *
builtin_inff(const struct bitable *bt, NODE *a)
{
uerror(__func__);
return bcon(0);
}
NODE *
builtin_infl(const struct bitable *bt, NODE *a)
{
uerror(__func__);
return bcon(0);
}
NODE *
builtin_nan(const struct bitable *bt, NODE *a)
{
uerror(__func__);
return bcon(0);
}
NODE *
builtin_nanf(const struct bitable *bt, NODE *a)
{
uerror(__func__);
return bcon(0);
}
NODE *
builtin_nanl(const struct bitable *bt, NODE *a)
{
uerror(__func__);
return bcon(0);
}