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4acb70d377
Eventually we will want to bypass DATA for everything, but the relocations are not standardized well enough across architectures to make that possible. This did not help as much as I expected, but it is definitely better. It shaves maybe 1-2% off all.bash depending on how much you trust the timings of a single run: Before: 241.139r 362.702u 112.967s After: 234.339r 359.623u 111.045s R=golang-codereviews, gobot, r, iant CC=golang-codereviews https://golang.org/cl/44650043
253 lines
5.3 KiB
C
253 lines
5.3 KiB
C
// Derived from Inferno utils/5c/swt.c
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// http://code.google.com/p/inferno-os/source/browse/utils/5c/swt.c
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//
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// Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
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// Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
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// Portions Copyright © 1997-1999 Vita Nuova Limited
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// Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
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// Portions Copyright © 2004,2006 Bruce Ellis
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// Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
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// Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
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// Portions Copyright © 2009 The Go Authors. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#include <u.h>
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#include <libc.h>
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#include "gg.h"
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int
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dsname(Sym *sym, int off, char *t, int n)
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{
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Prog *p;
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p = gins(ADATA, N, N);
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p->from.type = D_OREG;
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p->from.name = D_EXTERN;
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p->from.etype = TINT32;
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p->from.offset = off;
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p->from.reg = NREG;
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p->from.sym = linksym(sym);
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p->reg = n;
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p->to.type = D_SCONST;
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p->to.name = D_NONE;
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p->to.reg = NREG;
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p->to.offset = 0;
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memmove(p->to.u.sval, t, n);
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return off + n;
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}
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/*
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* make a refer to the data s, s+len
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* emitting DATA if needed.
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*/
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void
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datastring(char *s, int len, Addr *a)
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{
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Sym *sym;
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sym = stringsym(s, len);
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a->type = D_OREG;
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a->name = D_EXTERN;
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a->etype = TINT32;
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a->offset = widthptr+4; // skip header
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a->reg = NREG;
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a->sym = linksym(sym);
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a->node = sym->def;
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}
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/*
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* make a refer to the string sval,
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* emitting DATA if needed.
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*/
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void
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datagostring(Strlit *sval, Addr *a)
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{
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Sym *sym;
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sym = stringsym(sval->s, sval->len);
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a->type = D_OREG;
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a->name = D_EXTERN;
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a->etype = TINT32;
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a->offset = 0; // header
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a->reg = NREG;
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a->sym = linksym(sym);
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a->node = sym->def;
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}
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void
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gdata(Node *nam, Node *nr, int wid)
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{
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Prog *p;
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vlong v;
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if(nr->op == OLITERAL) {
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switch(nr->val.ctype) {
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case CTCPLX:
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gdatacomplex(nam, nr->val.u.cval);
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return;
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case CTSTR:
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gdatastring(nam, nr->val.u.sval);
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return;
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}
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}
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if(wid == 8 && is64(nr->type)) {
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v = mpgetfix(nr->val.u.xval);
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p = gins(ADATA, nam, nodintconst(v));
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p->reg = 4;
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p = gins(ADATA, nam, nodintconst(v>>32));
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p->reg = 4;
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p->from.offset += 4;
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return;
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}
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p = gins(ADATA, nam, nr);
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p->reg = wid;
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}
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void
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gdatacomplex(Node *nam, Mpcplx *cval)
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{
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Prog *p;
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int w;
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w = cplxsubtype(nam->type->etype);
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w = types[w]->width;
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p = gins(ADATA, nam, N);
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p->reg = w;
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p->to.type = D_FCONST;
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p->to.u.dval = mpgetflt(&cval->real);
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p = gins(ADATA, nam, N);
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p->reg = w;
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p->from.offset += w;
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p->to.type = D_FCONST;
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p->to.u.dval = mpgetflt(&cval->imag);
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}
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void
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gdatastring(Node *nam, Strlit *sval)
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{
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Prog *p;
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Node nod1;
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p = gins(ADATA, nam, N);
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datastring(sval->s, sval->len, &p->to);
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p->reg = types[tptr]->width;
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p->to.type = D_CONST;
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p->to.etype = TINT32;
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//print("%P\n", p);
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nodconst(&nod1, types[TINT32], sval->len);
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p = gins(ADATA, nam, &nod1);
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p->reg = types[TINT32]->width;
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p->from.offset += types[tptr]->width;
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}
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int
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dstringptr(Sym *s, int off, char *str)
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{
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Prog *p;
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off = rnd(off, widthptr);
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p = gins(ADATA, N, N);
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p->from.type = D_OREG;
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p->from.name = D_EXTERN;
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p->from.sym = linksym(s);
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p->from.offset = off;
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p->reg = widthptr;
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datastring(str, strlen(str)+1, &p->to);
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p->to.type = D_CONST;
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p->to.etype = TINT32;
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off += widthptr;
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return off;
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}
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int
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dgostrlitptr(Sym *s, int off, Strlit *lit)
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{
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Prog *p;
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if(lit == nil)
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return duintptr(s, off, 0);
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off = rnd(off, widthptr);
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p = gins(ADATA, N, N);
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p->from.type = D_OREG;
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p->from.name = D_EXTERN;
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p->from.sym = linksym(s);
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p->from.offset = off;
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p->reg = widthptr;
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datagostring(lit, &p->to);
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p->to.type = D_CONST;
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p->to.etype = TINT32;
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off += widthptr;
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return off;
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}
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int
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dgostringptr(Sym *s, int off, char *str)
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{
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int n;
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Strlit *lit;
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if(str == nil)
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return duintptr(s, off, 0);
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n = strlen(str);
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lit = mal(sizeof *lit + n);
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strcpy(lit->s, str);
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lit->len = n;
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return dgostrlitptr(s, off, lit);
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}
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int
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dsymptr(Sym *s, int off, Sym *x, int xoff)
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{
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Prog *p;
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off = rnd(off, widthptr);
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p = gins(ADATA, N, N);
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p->from.type = D_OREG;
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p->from.name = D_EXTERN;
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p->from.sym = linksym(s);
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p->from.offset = off;
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p->reg = widthptr;
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p->to.type = D_CONST;
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p->to.name = D_EXTERN;
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p->to.sym = linksym(x);
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p->to.offset = xoff;
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off += widthptr;
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return off;
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}
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void
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nopout(Prog *p)
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{
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p->as = ANOP;
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}
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