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// Derived from Inferno utils/5c/swt.c
// http://code.google.com/p/inferno-os/source/browse/utils/5c/swt.c
//
// Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
// Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
// Portions Copyright © 1997-1999 Vita Nuova Limited
// Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
// Portions Copyright © 2004,2006 Bruce Ellis
// Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
// Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
// Portions Copyright © 2009 The Go Authors. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#include <u.h>
#include <libc.h>
#include "gg.h"
int
dsname(Sym *sym, int off, char *t, int n)
{
Prog *p;
p = gins(ADATA, N, N);
p->from.type = D_OREG;
p->from.name = D_EXTERN;
p->from.etype = TINT32;
p->from.offset = off;
p->from.reg = NREG;
p->from.sym = linksym(sym);
p->reg = n;
p->to.type = D_SCONST;
p->to.name = D_NONE;
p->to.reg = NREG;
p->to.offset = 0;
memmove(p->to.u.sval, t, n);
return off + n;
}
/*
* make a refer to the data s, s+len
* emitting DATA if needed.
*/
void
datastring(char *s, int len, Addr *a)
{
Sym *sym;
sym = stringsym(s, len);
a->type = D_OREG;
a->name = D_EXTERN;
a->etype = TINT32;
a->offset = widthptr+4; // skip header
a->reg = NREG;
a->sym = linksym(sym);
a->node = sym->def;
}
/*
* make a refer to the string sval,
* emitting DATA if needed.
*/
void
datagostring(Strlit *sval, Addr *a)
{
Sym *sym;
sym = stringsym(sval->s, sval->len);
a->type = D_OREG;
a->name = D_EXTERN;
a->etype = TINT32;
a->offset = 0; // header
a->reg = NREG;
a->sym = linksym(sym);
a->node = sym->def;
}
void
gdata(Node *nam, Node *nr, int wid)
{
Prog *p;
vlong v;
if(nr->op == OLITERAL) {
switch(nr->val.ctype) {
case CTCPLX:
gdatacomplex(nam, nr->val.u.cval);
return;
case CTSTR:
gdatastring(nam, nr->val.u.sval);
return;
}
}
if(wid == 8 && is64(nr->type)) {
v = mpgetfix(nr->val.u.xval);
p = gins(ADATA, nam, nodintconst(v));
p->reg = 4;
p = gins(ADATA, nam, nodintconst(v>>32));
p->reg = 4;
p->from.offset += 4;
return;
}
p = gins(ADATA, nam, nr);
p->reg = wid;
}
void
gdatacomplex(Node *nam, Mpcplx *cval)
{
Prog *p;
int w;
w = cplxsubtype(nam->type->etype);
w = types[w]->width;
p = gins(ADATA, nam, N);
p->reg = w;
p->to.type = D_FCONST;
p->to.u.dval = mpgetflt(&cval->real);
p = gins(ADATA, nam, N);
p->reg = w;
p->from.offset += w;
p->to.type = D_FCONST;
p->to.u.dval = mpgetflt(&cval->imag);
}
void
gdatastring(Node *nam, Strlit *sval)
{
Prog *p;
Node nod1;
p = gins(ADATA, nam, N);
datastring(sval->s, sval->len, &p->to);
p->reg = types[tptr]->width;
p->to.type = D_CONST;
p->to.etype = TINT32;
//print("%P\n", p);
nodconst(&nod1, types[TINT32], sval->len);
p = gins(ADATA, nam, &nod1);
p->reg = types[TINT32]->width;
p->from.offset += types[tptr]->width;
}
int
dstringptr(Sym *s, int off, char *str)
{
Prog *p;
off = rnd(off, widthptr);
p = gins(ADATA, N, N);
p->from.type = D_OREG;
p->from.name = D_EXTERN;
p->from.sym = linksym(s);
p->from.offset = off;
p->reg = widthptr;
datastring(str, strlen(str)+1, &p->to);
p->to.type = D_CONST;
p->to.etype = TINT32;
off += widthptr;
return off;
}
int
dgostrlitptr(Sym *s, int off, Strlit *lit)
{
Prog *p;
if(lit == nil)
return duintptr(s, off, 0);
off = rnd(off, widthptr);
p = gins(ADATA, N, N);
p->from.type = D_OREG;
p->from.name = D_EXTERN;
p->from.sym = linksym(s);
p->from.offset = off;
p->reg = widthptr;
datagostring(lit, &p->to);
p->to.type = D_CONST;
p->to.etype = TINT32;
off += widthptr;
return off;
}
int
dgostringptr(Sym *s, int off, char *str)
{
int n;
Strlit *lit;
if(str == nil)
return duintptr(s, off, 0);
n = strlen(str);
lit = mal(sizeof *lit + n);
strcpy(lit->s, str);
lit->len = n;
return dgostrlitptr(s, off, lit);
}
int
dsymptr(Sym *s, int off, Sym *x, int xoff)
{
Prog *p;
off = rnd(off, widthptr);
p = gins(ADATA, N, N);
p->from.type = D_OREG;
p->from.name = D_EXTERN;
p->from.sym = linksym(s);
p->from.offset = off;
p->reg = widthptr;
p->to.type = D_CONST;
p->to.name = D_EXTERN;
p->to.sym = linksym(x);
p->to.offset = xoff;
off += widthptr;
return off;
}
void
nopout(Prog *p)
{
p->as = ANOP;
}
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