2008-06-04 15:37:38 -06:00
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#undef EXTERN
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#define EXTERN
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#include "gg.h"
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2008-11-19 10:49:06 -07:00
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#include "opt.h"
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2008-06-04 15:37:38 -06:00
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void
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compile(Node *fn)
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{
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Plist *pl;
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Node nod1;
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Prog *ptxt;
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2008-08-03 18:25:15 -06:00
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int32 lno;
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2008-10-01 21:00:58 -06:00
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Type *t;
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2008-10-02 16:37:15 -06:00
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Iter save;
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2008-06-16 23:34:50 -06:00
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2009-03-30 20:15:07 -06:00
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if(newproc == N) {
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2009-01-30 15:39:42 -07:00
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newproc = sysfunc("newproc");
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deferproc = sysfunc("deferproc");
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deferreturn = sysfunc("deferreturn");
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throwindex = sysfunc("throwindex");
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throwreturn = sysfunc("throwreturn");
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2009-03-30 20:15:07 -06:00
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}
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2008-09-12 17:48:35 -06:00
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2008-06-04 15:37:38 -06:00
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if(fn->nbody == N)
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return;
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2008-08-29 21:30:19 -06:00
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// set up domain for labels
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labellist = L;
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2008-06-26 18:54:44 -06:00
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lno = setlineno(fn);
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2008-06-16 23:34:50 -06:00
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2008-06-04 15:37:38 -06:00
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curfn = fn;
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dowidth(curfn->type);
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2008-10-01 21:00:58 -06:00
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if(curfn->type->outnamed) {
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// add clearing of the output parameters
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2008-10-02 16:37:15 -06:00
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t = structfirst(&save, getoutarg(curfn->type));
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2008-10-01 21:00:58 -06:00
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while(t != T) {
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2009-01-21 15:51:57 -07:00
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if(t->nname != N)
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2008-10-01 21:00:58 -06:00
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curfn->nbody = list(nod(OAS, t->nname, N), curfn->nbody);
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2008-10-02 16:37:15 -06:00
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t = structnext(&save);
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2008-10-01 21:00:58 -06:00
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}
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}
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2009-01-27 13:03:53 -07:00
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hasdefer = 0;
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2008-06-04 15:37:38 -06:00
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walk(curfn);
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if(nerrors != 0)
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2008-06-26 18:54:44 -06:00
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goto ret;
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2008-06-04 15:37:38 -06:00
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allocparams();
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continpc = P;
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breakpc = P;
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pl = newplist();
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pl->name = curfn->nname;
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pl->locals = autodcl;
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nodconst(&nod1, types[TINT32], 0);
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ptxt = gins(ATEXT, curfn->nname, &nod1);
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2009-01-30 15:39:42 -07:00
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afunclit(&ptxt->from);
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2008-06-04 15:37:38 -06:00
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ginit();
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2009-03-11 17:25:45 -06:00
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gen(curfn->enter);
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gen(curfn->nbody);
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2008-06-04 15:37:38 -06:00
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gclean();
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2008-08-29 21:30:19 -06:00
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checklabels();
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2008-06-04 15:37:38 -06:00
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2009-01-30 15:39:42 -07:00
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if(curfn->type->outtuple != 0)
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ginscall(throwreturn, 0);
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2008-06-04 15:37:38 -06:00
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2009-01-27 13:03:53 -07:00
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if(hasdefer)
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2009-01-30 15:39:42 -07:00
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ginscall(deferreturn, 0);
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2008-06-04 15:37:38 -06:00
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pc->as = ARET; // overwrite AEND
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2008-06-28 18:27:39 -06:00
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pc->lineno = lineno;
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2008-06-04 15:37:38 -06:00
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2008-11-22 18:58:53 -07:00
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if(!debug['N'] || debug['R'] || debug['P'])
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2008-11-18 20:24:37 -07:00
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regopt(ptxt);
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2008-11-18 18:15:42 -07:00
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2008-07-12 14:08:53 -06:00
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// fill in argument size
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2008-07-12 18:16:22 -06:00
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ptxt->to.offset = rnd(curfn->type->argwid, maxround);
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2008-07-12 14:08:53 -06:00
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2008-06-04 15:37:38 -06:00
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// fill in final stack size
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2008-07-12 14:08:53 -06:00
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ptxt->to.offset <<= 32;
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ptxt->to.offset |= rnd(stksize+maxarg, maxround);
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2008-06-04 15:37:38 -06:00
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if(debug['f'])
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frame(0);
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2008-06-16 23:34:50 -06:00
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2008-06-26 18:54:44 -06:00
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ret:
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lineno = lno;
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2008-06-04 15:37:38 -06:00
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}
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2009-01-05 18:32:23 -07:00
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/*
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* generate:
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* call f
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2009-01-27 13:03:53 -07:00
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* proc=0 normal call
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* proc=1 goroutine run in new proc
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* proc=2 defer call save away stack
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2009-01-05 18:32:23 -07:00
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*/
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2008-06-04 15:37:38 -06:00
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void
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2008-07-07 18:59:32 -06:00
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ginscall(Node *f, int proc)
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{
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2009-01-30 15:39:42 -07:00
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Prog *p;
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2008-07-08 18:19:17 -06:00
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Node reg, con;
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2008-07-07 18:59:32 -06:00
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2009-01-27 13:03:53 -07:00
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switch(proc) {
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default:
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fatal("ginscall: bad proc %d", proc);
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break;
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case 0: // normal call
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2009-01-30 15:39:42 -07:00
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p = gins(ACALL, N, f);
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afunclit(&p->to);
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2009-01-27 13:03:53 -07:00
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break;
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case 1: // call in new proc (go)
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case 2: // defered call (defer)
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2008-07-08 18:19:17 -06:00
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nodreg(®, types[TINT64], D_AX);
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2009-01-30 15:39:42 -07:00
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gins(APUSHQ, f, N);
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2008-07-08 18:19:17 -06:00
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nodconst(&con, types[TINT32], argsize(f->type));
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2008-07-11 20:16:39 -06:00
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gins(APUSHQ, &con, N);
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2009-01-27 13:03:53 -07:00
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if(proc == 1)
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2009-01-30 15:39:42 -07:00
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ginscall(newproc, 0);
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2009-01-27 13:03:53 -07:00
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else
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2009-01-30 15:39:42 -07:00
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ginscall(deferproc, 0);
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2008-07-11 20:16:39 -06:00
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gins(APOPQ, N, ®);
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gins(APOPQ, N, ®);
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2009-01-27 13:03:53 -07:00
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break;
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2008-07-07 18:59:32 -06:00
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}
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}
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2009-01-05 18:32:23 -07:00
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/*
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* n is call to interface method.
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* generate res = n.
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*/
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2008-07-07 18:59:32 -06:00
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void
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cgen_callinter(Node *n, Node *res, int proc)
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2008-06-04 15:37:38 -06:00
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{
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Node *i, *f;
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Node tmpi, nodo, nodr, nodsp;
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i = n->left;
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if(i->op != ODOTINTER)
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fatal("cgen_callinter: not ODOTINTER %O", i->op);
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f = i->right; // field
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if(f->op != ONAME)
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fatal("cgen_callinter: not ONAME %O", f->op);
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i = i->left; // interface
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if(!i->addable) {
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tempname(&tmpi, i->type);
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cgen(i, &tmpi);
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i = &tmpi;
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}
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2009-03-11 17:25:45 -06:00
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gen(n->right); // args
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2008-06-04 15:37:38 -06:00
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regalloc(&nodr, types[tptr], res);
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regalloc(&nodo, types[tptr], &nodr);
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nodo.op = OINDREG;
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agen(i, &nodr); // REG = &inter
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nodindreg(&nodsp, types[tptr], D_SP);
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nodo.xoffset += widthptr;
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cgen(&nodo, &nodsp); // 0(SP) = 8(REG) -- i.s
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nodo.xoffset -= widthptr;
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cgen(&nodo, &nodr); // REG = 0(REG) -- i.m
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nodo.xoffset = n->left->xoffset + 4*widthptr;
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cgen(&nodo, &nodr); // REG = 32+offset(REG) -- i.m->fun[f]
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2008-07-14 21:40:48 -06:00
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// BOTCH nodr.type = fntype;
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2009-02-23 23:43:04 -07:00
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nodr.type = n->left->type;
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2008-07-07 18:59:32 -06:00
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ginscall(&nodr, proc);
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2008-06-04 15:37:38 -06:00
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regfree(&nodr);
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2008-07-07 18:59:32 -06:00
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regfree(&nodo);
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2008-06-04 15:37:38 -06:00
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setmaxarg(n->left->type);
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}
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2009-01-05 18:32:23 -07:00
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/*
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* generate function call;
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2009-01-27 13:03:53 -07:00
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* proc=0 normal call
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* proc=1 goroutine run in new proc
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* proc=2 defer call save away stack
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2009-01-05 18:32:23 -07:00
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*/
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2008-06-04 15:37:38 -06:00
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void
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2008-07-07 18:59:32 -06:00
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cgen_call(Node *n, int proc)
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2008-06-04 15:37:38 -06:00
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{
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Type *t;
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2008-10-03 17:23:02 -06:00
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Node nod, afun;
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2008-06-04 15:37:38 -06:00
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if(n == N)
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return;
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if(n->left->ullman >= UINF) {
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// if name involves a fn call
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// precompute the address of the fn
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tempname(&afun, types[tptr]);
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2009-01-30 15:39:42 -07:00
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cgen(n->left, &afun);
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2008-06-04 15:37:38 -06:00
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}
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2009-03-11 17:25:45 -06:00
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gen(n->right); // assign the args
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2008-06-04 15:37:38 -06:00
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t = n->left->type;
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setmaxarg(t);
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// call tempname pointer
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if(n->left->ullman >= UINF) {
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regalloc(&nod, types[tptr], N);
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2009-01-05 18:32:23 -07:00
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cgen_as(&nod, &afun);
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2008-07-14 21:40:48 -06:00
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nod.type = t;
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2008-07-07 18:59:32 -06:00
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ginscall(&nod, proc);
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2008-06-04 15:37:38 -06:00
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regfree(&nod);
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2008-06-26 18:54:44 -06:00
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goto ret;
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2008-06-04 15:37:38 -06:00
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}
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// call pointer
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2009-01-30 15:39:42 -07:00
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if(n->left->op != ONAME || n->left->class != PFUNC) {
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2008-06-04 15:37:38 -06:00
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regalloc(&nod, types[tptr], N);
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2009-01-05 18:32:23 -07:00
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cgen_as(&nod, n->left);
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2008-07-14 21:40:48 -06:00
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nod.type = t;
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2008-07-07 18:59:32 -06:00
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ginscall(&nod, proc);
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2008-06-04 15:37:38 -06:00
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regfree(&nod);
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2008-06-26 18:54:44 -06:00
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goto ret;
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2008-06-04 15:37:38 -06:00
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}
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// call direct
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2008-06-11 22:06:26 -06:00
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n->left->method = 1;
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2008-07-07 18:59:32 -06:00
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ginscall(n->left, proc);
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2008-06-26 18:54:44 -06:00
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2009-01-30 15:39:42 -07:00
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2008-06-26 18:54:44 -06:00
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ret:
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2008-06-28 18:27:39 -06:00
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;
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2008-06-04 15:37:38 -06:00
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}
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2009-01-05 18:32:23 -07:00
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/*
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* call to n has already been generated.
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* generate:
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* res = return value from call.
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*/
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2008-06-04 15:37:38 -06:00
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void
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cgen_callret(Node *n, Node *res)
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{
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Node nod;
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Type *fp, *t;
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Iter flist;
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t = n->left->type;
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if(t->etype == TPTR32 || t->etype == TPTR64)
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t = t->type;
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fp = structfirst(&flist, getoutarg(t));
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if(fp == T)
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2008-06-24 11:30:33 -06:00
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fatal("cgen_callret: nil");
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2008-06-04 15:37:38 -06:00
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memset(&nod, 0, sizeof(nod));
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nod.op = OINDREG;
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2008-08-08 18:13:31 -06:00
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nod.val.u.reg = D_SP;
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2008-06-04 15:37:38 -06:00
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nod.addable = 1;
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nod.xoffset = fp->width;
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nod.type = fp->type;
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2009-01-05 18:32:23 -07:00
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cgen_as(res, &nod);
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2008-06-21 16:11:29 -06:00
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}
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2009-01-05 18:32:23 -07:00
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/*
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* call to n has already been generated.
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* generate:
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* res = &return value from call.
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*/
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2008-06-21 16:11:29 -06:00
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void
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cgen_aret(Node *n, Node *res)
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{
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2008-12-20 17:05:12 -07:00
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Node nod1, nod2;
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2008-06-21 16:11:29 -06:00
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Type *fp, *t;
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Iter flist;
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t = n->left->type;
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2008-06-24 11:30:33 -06:00
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if(isptr[t->etype])
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2008-06-21 16:11:29 -06:00
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t = t->type;
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fp = structfirst(&flist, getoutarg(t));
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if(fp == T)
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fatal("cgen_aret: nil");
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2008-06-24 11:30:33 -06:00
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2008-06-21 16:11:29 -06:00
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memset(&nod1, 0, sizeof(nod1));
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nod1.op = OINDREG;
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2008-08-08 18:13:31 -06:00
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nod1.val.u.reg = D_SP;
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2008-06-21 16:11:29 -06:00
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nod1.addable = 1;
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nod1.xoffset = fp->width;
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nod1.type = fp->type;
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2008-12-20 17:05:12 -07:00
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|
|
if(res->op != OREGISTER) {
|
|
|
|
regalloc(&nod2, types[tptr], res);
|
|
|
|
gins(ALEAQ, &nod1, &nod2);
|
|
|
|
gins(AMOVQ, &nod2, res);
|
2008-12-20 17:07:56 -07:00
|
|
|
regfree(&nod2);
|
2008-12-20 17:05:12 -07:00
|
|
|
} else
|
|
|
|
gins(ALEAQ, &nod1, res);
|
2008-06-04 15:37:38 -06:00
|
|
|
}
|
|
|
|
|
2009-01-05 18:32:23 -07:00
|
|
|
/*
|
|
|
|
* generate return.
|
|
|
|
* n->left is assignments to return values.
|
|
|
|
*/
|
2008-06-04 15:37:38 -06:00
|
|
|
void
|
|
|
|
cgen_ret(Node *n)
|
|
|
|
{
|
2009-03-11 17:25:45 -06:00
|
|
|
gen(n->left); // copy out args
|
2009-01-27 13:03:53 -07:00
|
|
|
if(hasdefer)
|
2009-01-30 15:39:42 -07:00
|
|
|
ginscall(deferreturn, 0);
|
2008-06-04 15:37:38 -06:00
|
|
|
gins(ARET, N, N);
|
|
|
|
}
|
|
|
|
|
2009-01-05 18:32:23 -07:00
|
|
|
/*
|
|
|
|
* generate += *= etc.
|
|
|
|
*/
|
2008-06-04 15:37:38 -06:00
|
|
|
void
|
2008-06-12 15:21:09 -06:00
|
|
|
cgen_asop(Node *n)
|
2008-06-04 15:37:38 -06:00
|
|
|
{
|
2008-06-12 15:21:09 -06:00
|
|
|
Node n1, n2, n3, n4;
|
|
|
|
Node *nl, *nr;
|
2008-12-14 19:45:00 -07:00
|
|
|
Prog *p1;
|
|
|
|
Addr addr;
|
2009-05-03 16:17:03 -06:00
|
|
|
int a;
|
2008-06-26 18:54:44 -06:00
|
|
|
|
2008-06-12 15:21:09 -06:00
|
|
|
nl = n->left;
|
|
|
|
nr = n->right;
|
2008-06-04 15:37:38 -06:00
|
|
|
|
2008-12-14 19:45:00 -07:00
|
|
|
if(nr->ullman >= UINF && nl->ullman >= UINF) {
|
|
|
|
tempname(&n1, nr->type);
|
|
|
|
cgen(nr, &n1);
|
|
|
|
n2 = *n;
|
|
|
|
n2.right = &n1;
|
|
|
|
cgen_asop(&n2);
|
|
|
|
goto ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
if(!isint[nl->type->etype])
|
|
|
|
goto hard;
|
|
|
|
if(!isint[nr->type->etype])
|
|
|
|
goto hard;
|
|
|
|
|
2008-11-22 18:58:53 -07:00
|
|
|
switch(n->etype) {
|
|
|
|
case OADD:
|
2008-12-14 19:45:00 -07:00
|
|
|
if(smallintconst(nr))
|
|
|
|
if(mpgetfix(nr->val.u.xval) == 1) {
|
2009-05-03 16:17:03 -06:00
|
|
|
a = optoas(OINC, nl->type);
|
2008-12-14 19:45:00 -07:00
|
|
|
if(nl->addable) {
|
2009-05-03 16:17:03 -06:00
|
|
|
gins(a, N, nl);
|
2008-12-14 19:45:00 -07:00
|
|
|
goto ret;
|
|
|
|
}
|
2009-05-03 16:17:03 -06:00
|
|
|
if(sudoaddable(a, nl, &addr)) {
|
|
|
|
p1 = gins(a, N, N);
|
2008-12-14 19:45:00 -07:00
|
|
|
p1->to = addr;
|
|
|
|
sudoclean();
|
|
|
|
goto ret;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
2008-11-22 18:58:53 -07:00
|
|
|
case OSUB:
|
2008-12-14 19:45:00 -07:00
|
|
|
if(smallintconst(nr))
|
|
|
|
if(mpgetfix(nr->val.u.xval) == 1) {
|
2009-05-03 16:17:03 -06:00
|
|
|
a = optoas(ODEC, nl->type);
|
2008-12-14 19:45:00 -07:00
|
|
|
if(nl->addable) {
|
2009-05-03 16:17:03 -06:00
|
|
|
gins(a, N, nl);
|
2008-12-14 19:45:00 -07:00
|
|
|
goto ret;
|
|
|
|
}
|
2009-05-03 16:17:03 -06:00
|
|
|
if(sudoaddable(a, nl, &addr)) {
|
|
|
|
p1 = gins(a, N, N);
|
2008-12-14 19:45:00 -07:00
|
|
|
p1->to = addr;
|
|
|
|
sudoclean();
|
|
|
|
goto ret;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
break;
|
2008-11-24 18:51:26 -07:00
|
|
|
}
|
2008-11-22 18:58:53 -07:00
|
|
|
|
2008-11-24 18:51:26 -07:00
|
|
|
switch(n->etype) {
|
2008-12-14 19:45:00 -07:00
|
|
|
case OADD:
|
|
|
|
case OSUB:
|
2008-11-22 18:58:53 -07:00
|
|
|
case OXOR:
|
|
|
|
case OAND:
|
|
|
|
case OOR:
|
2009-05-03 16:17:03 -06:00
|
|
|
a = optoas(n->etype, nl->type);
|
2008-12-14 19:45:00 -07:00
|
|
|
if(nl->addable) {
|
|
|
|
if(smallintconst(nr)) {
|
2009-05-03 16:17:03 -06:00
|
|
|
gins(a, nr, nl);
|
2008-12-14 19:45:00 -07:00
|
|
|
goto ret;
|
|
|
|
}
|
|
|
|
regalloc(&n2, nr->type, N);
|
|
|
|
cgen(nr, &n2);
|
2009-05-03 16:17:03 -06:00
|
|
|
gins(a, &n2, nl);
|
2008-12-14 19:45:00 -07:00
|
|
|
regfree(&n2);
|
|
|
|
goto ret;
|
|
|
|
}
|
|
|
|
if(nr->ullman < UINF)
|
2009-05-03 16:17:03 -06:00
|
|
|
if(sudoaddable(a, nl, &addr)) {
|
2008-12-14 19:45:00 -07:00
|
|
|
if(smallintconst(nr)) {
|
2009-05-03 16:17:03 -06:00
|
|
|
p1 = gins(a, nr, N);
|
2008-12-14 19:45:00 -07:00
|
|
|
p1->to = addr;
|
|
|
|
sudoclean();
|
|
|
|
goto ret;
|
|
|
|
}
|
|
|
|
regalloc(&n2, nr->type, N);
|
|
|
|
cgen(nr, &n2);
|
2009-05-03 16:17:03 -06:00
|
|
|
p1 = gins(a, &n2, N);
|
2008-12-14 19:45:00 -07:00
|
|
|
p1->to = addr;
|
|
|
|
regfree(&n2);
|
|
|
|
sudoclean();
|
|
|
|
goto ret;
|
|
|
|
}
|
2008-06-06 17:49:35 -06:00
|
|
|
}
|
2008-06-04 15:37:38 -06:00
|
|
|
|
2008-12-14 19:45:00 -07:00
|
|
|
hard:
|
2008-06-12 15:21:09 -06:00
|
|
|
if(nr->ullman > nl->ullman) {
|
2008-11-01 18:53:12 -06:00
|
|
|
regalloc(&n2, nr->type, N);
|
2008-06-12 15:21:09 -06:00
|
|
|
cgen(nr, &n2);
|
|
|
|
igen(nl, &n1, N);
|
|
|
|
} else {
|
|
|
|
igen(nl, &n1, N);
|
2008-11-01 18:53:12 -06:00
|
|
|
regalloc(&n2, nr->type, N);
|
2008-06-10 22:29:57 -06:00
|
|
|
cgen(nr, &n2);
|
2008-06-04 15:37:38 -06:00
|
|
|
}
|
|
|
|
|
2008-06-12 15:21:09 -06:00
|
|
|
n3 = *n;
|
|
|
|
n3.left = &n1;
|
|
|
|
n3.right = &n2;
|
|
|
|
n3.op = n->etype;
|
|
|
|
|
2008-11-01 18:53:12 -06:00
|
|
|
regalloc(&n4, nl->type, N);
|
2008-06-12 15:21:09 -06:00
|
|
|
cgen(&n3, &n4);
|
|
|
|
gmove(&n4, &n1);
|
2008-06-10 22:29:57 -06:00
|
|
|
|
2008-06-04 15:37:38 -06:00
|
|
|
regfree(&n1);
|
|
|
|
regfree(&n2);
|
2008-06-12 15:21:09 -06:00
|
|
|
regfree(&n4);
|
2008-06-28 18:27:39 -06:00
|
|
|
|
|
|
|
ret:
|
|
|
|
;
|
2008-06-04 15:37:38 -06:00
|
|
|
}
|
|
|
|
|
2008-06-06 22:21:54 -06:00
|
|
|
int
|
|
|
|
samereg(Node *a, Node *b)
|
|
|
|
{
|
|
|
|
if(a->op != OREGISTER)
|
|
|
|
return 0;
|
|
|
|
if(b->op != OREGISTER)
|
|
|
|
return 0;
|
2008-08-08 18:13:31 -06:00
|
|
|
if(a->val.u.reg != b->val.u.reg)
|
2008-06-06 22:21:54 -06:00
|
|
|
return 0;
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2009-01-05 18:32:23 -07:00
|
|
|
/*
|
|
|
|
* generate division.
|
|
|
|
* caller must set:
|
|
|
|
* ax = allocated AX register
|
|
|
|
* dx = allocated DX register
|
|
|
|
* generates one of:
|
|
|
|
* res = nl / nr
|
|
|
|
* res = nl % nr
|
|
|
|
* according to op.
|
|
|
|
*/
|
2008-06-06 21:43:29 -06:00
|
|
|
void
|
2008-07-17 17:22:40 -06:00
|
|
|
dodiv(int op, Node *nl, Node *nr, Node *res, Node *ax, Node *dx)
|
2008-06-06 21:43:29 -06:00
|
|
|
{
|
2008-07-17 16:03:39 -06:00
|
|
|
int a;
|
2008-11-03 14:27:16 -07:00
|
|
|
Node n3, n4;
|
2008-09-15 16:03:10 -06:00
|
|
|
Type *t;
|
2008-06-06 22:21:54 -06:00
|
|
|
|
2008-09-15 16:03:10 -06:00
|
|
|
t = nl->type;
|
|
|
|
if(t->width == 1) {
|
|
|
|
if(issigned[t->etype])
|
|
|
|
t = types[TINT32];
|
|
|
|
else
|
|
|
|
t = types[TUINT32];
|
|
|
|
}
|
|
|
|
a = optoas(op, t);
|
2008-06-06 21:43:29 -06:00
|
|
|
|
2008-06-07 16:21:02 -06:00
|
|
|
regalloc(&n3, nr->type, N);
|
2008-06-06 21:43:29 -06:00
|
|
|
if(nl->ullman >= nr->ullman) {
|
2008-07-17 17:22:40 -06:00
|
|
|
cgen(nl, ax);
|
2008-11-03 14:27:16 -07:00
|
|
|
if(!issigned[t->etype]) {
|
|
|
|
nodconst(&n4, t, 0);
|
|
|
|
gmove(&n4, dx);
|
|
|
|
} else
|
2009-01-05 18:32:23 -07:00
|
|
|
gins(optoas(OEXTEND, t), N, N);
|
2008-06-06 22:21:54 -06:00
|
|
|
cgen(nr, &n3);
|
2008-06-06 21:43:29 -06:00
|
|
|
} else {
|
|
|
|
cgen(nr, &n3);
|
2008-07-17 17:22:40 -06:00
|
|
|
cgen(nl, ax);
|
2008-11-03 14:27:16 -07:00
|
|
|
if(!issigned[t->etype]) {
|
|
|
|
nodconst(&n4, t, 0);
|
|
|
|
gmove(&n4, dx);
|
|
|
|
} else
|
2009-01-05 18:32:23 -07:00
|
|
|
gins(optoas(OEXTEND, t), N, N);
|
2008-06-06 21:43:29 -06:00
|
|
|
}
|
2008-11-03 14:27:16 -07:00
|
|
|
gins(a, &n3, N);
|
2008-06-06 22:21:54 -06:00
|
|
|
regfree(&n3);
|
2008-06-06 21:43:29 -06:00
|
|
|
|
|
|
|
if(op == ODIV)
|
2008-07-17 17:22:40 -06:00
|
|
|
gmove(ax, res);
|
2008-06-06 21:43:29 -06:00
|
|
|
else
|
2008-07-17 17:22:40 -06:00
|
|
|
gmove(dx, res);
|
2008-07-17 16:03:39 -06:00
|
|
|
}
|
2008-06-26 18:54:44 -06:00
|
|
|
|
2009-01-05 18:32:23 -07:00
|
|
|
/*
|
|
|
|
* generate division according to op, one of:
|
|
|
|
* res = nl / nr
|
|
|
|
* res = nl % nr
|
|
|
|
*/
|
2008-07-17 16:03:39 -06:00
|
|
|
void
|
|
|
|
cgen_div(int op, Node *nl, Node *nr, Node *res)
|
|
|
|
{
|
2008-12-13 17:41:47 -07:00
|
|
|
Node ax, dx;
|
2008-10-03 17:23:02 -06:00
|
|
|
int rax, rdx;
|
2008-07-17 16:03:39 -06:00
|
|
|
|
|
|
|
rax = reg[D_AX];
|
|
|
|
rdx = reg[D_DX];
|
|
|
|
|
2008-07-17 17:22:40 -06:00
|
|
|
nodreg(&ax, types[TINT64], D_AX);
|
|
|
|
nodreg(&dx, types[TINT64], D_DX);
|
|
|
|
regalloc(&ax, nl->type, &ax);
|
|
|
|
regalloc(&dx, nl->type, &dx);
|
2008-07-17 16:03:39 -06:00
|
|
|
|
2008-07-17 17:22:40 -06:00
|
|
|
dodiv(op, nl, nr, res, &ax, &dx);
|
|
|
|
|
|
|
|
regfree(&ax);
|
|
|
|
regfree(&dx);
|
2008-06-06 21:43:29 -06:00
|
|
|
}
|
2008-06-07 16:21:02 -06:00
|
|
|
|
2009-01-05 18:32:23 -07:00
|
|
|
/*
|
|
|
|
* generate shift according to op, one of:
|
|
|
|
* res = nl << nr
|
|
|
|
* res = nl >> nr
|
|
|
|
*/
|
2008-06-07 16:21:02 -06:00
|
|
|
void
|
|
|
|
cgen_shift(int op, Node *nl, Node *nr, Node *res)
|
|
|
|
{
|
2008-08-28 20:59:42 -06:00
|
|
|
Node n1, n2, n3;
|
2009-04-21 20:38:58 -06:00
|
|
|
int a;
|
2008-08-28 20:59:42 -06:00
|
|
|
Prog *p1;
|
2008-06-07 16:21:02 -06:00
|
|
|
|
|
|
|
a = optoas(op, nl->type);
|
|
|
|
|
|
|
|
if(nr->op == OLITERAL) {
|
2008-10-29 13:46:44 -06:00
|
|
|
regalloc(&n1, nl->type, res);
|
2008-06-07 16:21:02 -06:00
|
|
|
cgen(nl, &n1);
|
2008-11-18 18:15:42 -07:00
|
|
|
if(mpgetfix(nr->val.u.xval) >= nl->type->width*8) {
|
|
|
|
// large shift gets 2 shifts by width
|
|
|
|
nodconst(&n3, types[TUINT32], nl->type->width*8-1);
|
|
|
|
gins(a, &n3, &n1);
|
|
|
|
gins(a, &n3, &n1);
|
|
|
|
} else
|
|
|
|
gins(a, nr, &n1);
|
2008-06-07 16:21:02 -06:00
|
|
|
gmove(&n1, res);
|
|
|
|
regfree(&n1);
|
2008-06-26 18:54:44 -06:00
|
|
|
goto ret;
|
2008-06-07 16:21:02 -06:00
|
|
|
}
|
|
|
|
|
2009-04-21 20:38:58 -06:00
|
|
|
nodreg(&n1, types[TUINT32], D_CX);
|
|
|
|
regalloc(&n1, nr->type, &n1); // to hold the shift type in CX
|
|
|
|
regalloc(&n3, types[TUINT64], &n1); // to clear high bits of CX
|
2008-06-07 16:21:02 -06:00
|
|
|
|
2008-12-13 17:41:47 -07:00
|
|
|
regalloc(&n2, nl->type, res);
|
2008-06-07 16:21:02 -06:00
|
|
|
if(nl->ullman >= nr->ullman) {
|
|
|
|
cgen(nl, &n2);
|
|
|
|
cgen(nr, &n1);
|
2009-04-21 20:38:58 -06:00
|
|
|
gmove(&n1, &n3);
|
2008-06-07 16:21:02 -06:00
|
|
|
} else {
|
|
|
|
cgen(nr, &n1);
|
2009-04-21 20:38:58 -06:00
|
|
|
gmove(&n1, &n3);
|
2008-06-07 16:21:02 -06:00
|
|
|
cgen(nl, &n2);
|
|
|
|
}
|
2009-04-21 20:38:58 -06:00
|
|
|
regfree(&n3);
|
|
|
|
|
2008-08-28 20:59:42 -06:00
|
|
|
// test and fix up large shifts
|
2009-04-21 20:38:58 -06:00
|
|
|
nodconst(&n3, types[TUINT64], nl->type->width*8);
|
|
|
|
gins(optoas(OCMP, types[TUINT64]), &n1, &n3);
|
|
|
|
p1 = gbranch(optoas(OLT, types[TUINT64]), T);
|
2008-08-28 20:59:42 -06:00
|
|
|
if(op == ORSH && issigned[nl->type->etype]) {
|
|
|
|
nodconst(&n3, types[TUINT32], nl->type->width*8-1);
|
|
|
|
gins(a, &n3, &n2);
|
|
|
|
} else {
|
|
|
|
nodconst(&n3, nl->type, 0);
|
|
|
|
gmove(&n3, &n2);
|
|
|
|
}
|
|
|
|
patch(p1, pc);
|
2008-06-07 16:21:02 -06:00
|
|
|
gins(a, &n1, &n2);
|
2008-08-28 20:59:42 -06:00
|
|
|
|
2008-06-07 16:21:02 -06:00
|
|
|
gmove(&n2, res);
|
|
|
|
|
|
|
|
regfree(&n1);
|
|
|
|
regfree(&n2);
|
2008-06-26 18:54:44 -06:00
|
|
|
|
|
|
|
ret:
|
2008-06-28 18:27:39 -06:00
|
|
|
;
|
2008-06-07 16:21:02 -06:00
|
|
|
}
|
2008-08-29 21:30:19 -06:00
|
|
|
|
2009-01-05 18:32:23 -07:00
|
|
|
/*
|
|
|
|
* generate byte multiply:
|
|
|
|
* res = nl * nr
|
|
|
|
* no byte multiply instruction so have to do
|
|
|
|
* 16-bit multiply and take bottom half.
|
|
|
|
*/
|
2008-11-07 15:20:32 -07:00
|
|
|
void
|
|
|
|
cgen_bmul(int op, Node *nl, Node *nr, Node *res)
|
|
|
|
{
|
2009-01-05 18:32:23 -07:00
|
|
|
Node n1b, n2b, n1w, n2w;
|
2008-11-07 15:20:32 -07:00
|
|
|
Type *t;
|
|
|
|
int a;
|
|
|
|
|
|
|
|
if(nl->ullman >= nr->ullman) {
|
2009-01-05 18:32:23 -07:00
|
|
|
regalloc(&n1b, nl->type, res);
|
|
|
|
cgen(nl, &n1b);
|
|
|
|
regalloc(&n2b, nr->type, N);
|
|
|
|
cgen(nr, &n2b);
|
2008-11-07 15:20:32 -07:00
|
|
|
} else {
|
2009-01-05 18:32:23 -07:00
|
|
|
regalloc(&n2b, nr->type, N);
|
|
|
|
cgen(nr, &n2b);
|
|
|
|
regalloc(&n1b, nl->type, res);
|
|
|
|
cgen(nl, &n1b);
|
2008-11-07 15:20:32 -07:00
|
|
|
}
|
2008-11-07 17:05:17 -07:00
|
|
|
|
2009-01-05 18:32:23 -07:00
|
|
|
// copy from byte to short registers
|
2008-11-07 17:05:17 -07:00
|
|
|
t = types[TUINT16];
|
|
|
|
if(issigned[nl->type->etype])
|
|
|
|
t = types[TINT16];
|
|
|
|
|
2009-01-05 18:32:23 -07:00
|
|
|
regalloc(&n2w, t, &n2b);
|
|
|
|
cgen(&n2b, &n2w);
|
2008-11-07 17:05:17 -07:00
|
|
|
|
2009-01-05 18:32:23 -07:00
|
|
|
regalloc(&n1w, t, &n1b);
|
|
|
|
cgen(&n1b, &n1w);
|
2008-11-07 17:05:17 -07:00
|
|
|
|
2008-11-07 15:20:32 -07:00
|
|
|
a = optoas(op, t);
|
2009-01-05 18:32:23 -07:00
|
|
|
gins(a, &n2w, &n1w);
|
|
|
|
cgen(&n1w, &n1b);
|
|
|
|
cgen(&n1b, res);
|
|
|
|
|
|
|
|
regfree(&n1w);
|
|
|
|
regfree(&n2w);
|
|
|
|
regfree(&n1b);
|
|
|
|
regfree(&n2b);
|
2008-11-07 15:20:32 -07:00
|
|
|
}
|
|
|
|
|
2008-08-29 21:30:19 -06:00
|
|
|
void
|
2009-03-30 20:15:07 -06:00
|
|
|
clearfat(Node *nl)
|
2008-08-29 21:30:19 -06:00
|
|
|
{
|
2009-03-30 20:15:07 -06:00
|
|
|
uint32 w, c, q;
|
|
|
|
Node n1;
|
2008-08-29 21:30:19 -06:00
|
|
|
|
2009-03-30 20:15:07 -06:00
|
|
|
/* clear a fat object */
|
|
|
|
if(debug['g'])
|
|
|
|
dump("\nclearfat", nl);
|
2008-08-29 21:30:19 -06:00
|
|
|
|
2009-03-30 20:15:07 -06:00
|
|
|
w = nl->type->width;
|
|
|
|
c = w % 8; // bytes
|
|
|
|
q = w / 8; // quads
|
|
|
|
|
|
|
|
gconreg(AMOVQ, 0, D_AX);
|
|
|
|
nodreg(&n1, types[tptr], D_DI);
|
|
|
|
agen(nl, &n1);
|
|
|
|
|
|
|
|
if(q >= 4) {
|
|
|
|
gconreg(AMOVQ, q, D_CX);
|
|
|
|
gins(AREP, N, N); // repeat
|
|
|
|
gins(ASTOSQ, N, N); // STOQ AL,*(DI)+
|
|
|
|
} else
|
|
|
|
while(q > 0) {
|
|
|
|
gins(ASTOSQ, N, N); // STOQ AL,*(DI)+
|
|
|
|
q--;
|
|
|
|
}
|
|
|
|
|
|
|
|
if(c >= 4) {
|
|
|
|
gconreg(AMOVQ, c, D_CX);
|
|
|
|
gins(AREP, N, N); // repeat
|
|
|
|
gins(ASTOSB, N, N); // STOB AL,*(DI)+
|
|
|
|
} else
|
|
|
|
while(c > 0) {
|
|
|
|
gins(ASTOSB, N, N); // STOB AL,*(DI)+
|
|
|
|
c--;
|
2008-08-29 21:30:19 -06:00
|
|
|
}
|
|
|
|
}
|
2009-05-16 14:29:08 -06:00
|
|
|
|
2009-05-17 20:16:16 -06:00
|
|
|
int
|
|
|
|
getlit(Node *lit)
|
|
|
|
{
|
|
|
|
if(smallintconst(lit))
|
|
|
|
return mpgetfix(lit->val.u.xval);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
int
|
|
|
|
stataddr(Node *nam, Node *n)
|
|
|
|
{
|
|
|
|
int l;
|
|
|
|
|
|
|
|
if(n == N)
|
|
|
|
goto no;
|
|
|
|
|
|
|
|
switch(n->op) {
|
|
|
|
case ONAME:
|
|
|
|
*nam = *n;
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
case ODOT:
|
|
|
|
if(!stataddr(nam, n->left))
|
|
|
|
break;
|
|
|
|
nam->xoffset += n->xoffset;
|
|
|
|
nam->type = n->type;
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
case OINDEX:
|
|
|
|
if(n->left->type->bound < 0)
|
|
|
|
break;
|
|
|
|
if(!stataddr(nam, n->left))
|
|
|
|
break;
|
|
|
|
l = getlit(n->right);
|
|
|
|
if(l < 0)
|
|
|
|
break;
|
|
|
|
nam->xoffset += l*n->type->width;
|
|
|
|
nam->type = n->type;
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
no:
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2009-05-16 14:29:08 -06:00
|
|
|
int
|
|
|
|
gen_as_init(Node *nr, Node *nl)
|
|
|
|
{
|
2009-05-18 23:11:22 -06:00
|
|
|
Node nam, nod1;
|
2009-05-17 20:16:16 -06:00
|
|
|
Prog *p;
|
|
|
|
|
|
|
|
if(!initflag)
|
|
|
|
goto no;
|
|
|
|
|
|
|
|
if(nr == N) {
|
|
|
|
if(!stataddr(&nam, nl))
|
|
|
|
goto no;
|
|
|
|
if(nam.class != PEXTERN)
|
|
|
|
goto no;
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2009-05-18 23:11:22 -06:00
|
|
|
if(nr->op == OCOMPSLICE) {
|
|
|
|
// create a slice pointing to an array
|
|
|
|
if(!stataddr(&nam, nl)) {
|
|
|
|
dump("stataddr", nl);
|
|
|
|
goto no;
|
|
|
|
}
|
|
|
|
|
|
|
|
p = gins(ADATA, &nam, nr->left);
|
|
|
|
p->from.scale = types[tptr]->width;
|
|
|
|
p->to.index = p->to.type;
|
|
|
|
p->to.type = D_ADDR;
|
|
|
|
//print("%P\n", p);
|
|
|
|
|
|
|
|
nodconst(&nod1, types[TINT32], nr->left->type->bound);
|
|
|
|
p = gins(ADATA, &nam, &nod1);
|
|
|
|
p->from.scale = types[TINT32]->width;
|
|
|
|
p->from.offset += types[tptr]->width;
|
|
|
|
//print("%P\n", p);
|
|
|
|
|
|
|
|
p = gins(ADATA, &nam, &nod1);
|
|
|
|
p->from.scale = types[TINT32]->width;
|
|
|
|
p->from.offset += types[tptr]->width+types[TINT32]->width;
|
|
|
|
|
|
|
|
goto yes;
|
|
|
|
}
|
|
|
|
|
2009-05-17 20:16:16 -06:00
|
|
|
if(nr->type == T ||
|
|
|
|
!eqtype(nl->type, nr->type))
|
|
|
|
goto no;
|
|
|
|
|
|
|
|
if(!stataddr(&nam, nl))
|
|
|
|
goto no;
|
|
|
|
if(nam.class != PEXTERN)
|
|
|
|
goto no;
|
|
|
|
|
|
|
|
switch(nr->op) {
|
|
|
|
default:
|
|
|
|
goto no;
|
|
|
|
|
|
|
|
case OLITERAL:
|
|
|
|
goto lit;
|
|
|
|
}
|
|
|
|
|
|
|
|
no:
|
2009-05-16 14:29:08 -06:00
|
|
|
return 0;
|
2009-05-17 20:16:16 -06:00
|
|
|
|
|
|
|
lit:
|
|
|
|
switch(nr->type->etype) {
|
|
|
|
default:
|
|
|
|
goto no;
|
|
|
|
|
|
|
|
case TBOOL:
|
|
|
|
if(memcmp(nam.sym->name, "initdone·", 9) == 0)
|
|
|
|
goto no;
|
|
|
|
case TINT8:
|
|
|
|
case TUINT8:
|
|
|
|
case TINT16:
|
|
|
|
case TUINT16:
|
|
|
|
case TINT32:
|
|
|
|
case TUINT32:
|
|
|
|
case TINT64:
|
|
|
|
case TUINT64:
|
|
|
|
case TINT:
|
|
|
|
case TUINT:
|
|
|
|
case TFLOAT32:
|
|
|
|
case TFLOAT64:
|
|
|
|
case TFLOAT:
|
|
|
|
p = gins(ADATA, &nam, nr);
|
|
|
|
p->from.scale = nr->type->width;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
yes:
|
|
|
|
//dump("\ngen_as_init", nl);
|
|
|
|
//dump("", nr);
|
|
|
|
//print("%P\n", p);
|
|
|
|
return 1;
|
2009-05-16 14:29:08 -06:00
|
|
|
}
|