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robfinch |
#include <stdio.h>
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#include "c.h"
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#include "expr.h"
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#include "Statement.h"
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#include "gen.h"
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#include "cglbdec.h"
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/*
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* 68000 C compiler
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*
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* Copyright 1984, 1985, 1986 Matthew Brandt.
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* all commercial rights reserved.
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*
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* This compiler is intended as an instructive tool for personal use. Any
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* use for profit without the written consent of the author is prohibited.
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*
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* This compiler may be distributed freely for non-commercial use as long
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* as this notice stays intact. Please forward any enhancements or questions
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* to:
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*
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* Matthew Brandt
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* Box 920337
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* Norcross, Ga 30092
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*/
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/*
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* this module contains all of the code generation routines
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* for evaluating expressions and conditions.
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*/
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/*******************************************************
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Modified to support Raptor64 'C64' language
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by Robert Finch
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robfinch@opencores.org
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*******************************************************/
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AMODE *GenerateExpression(); /* forward ParseSpecifieraration */
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extern int throwlab;
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/*
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* construct a reference node for an internal label number.
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*/
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AMODE *make_label(__int64 lab)
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{
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struct enode *lnode;
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struct amode *ap;
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lnode = xalloc(sizeof(struct enode));
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lnode->nodetype = en_labcon;
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lnode->i = lab;
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ap = xalloc(sizeof(struct amode));
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ap->mode = am_direct;
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ap->offset = lnode;
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return ap;
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}
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AMODE *make_string(char *s)
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{
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ENODE *lnode;
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AMODE *ap;
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lnode = xalloc(sizeof(struct enode));
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lnode->nodetype = en_nacon;
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lnode->sp = s;
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ap = allocAmode();
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ap->mode = am_direct;
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ap->offset = lnode;
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return ap;
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}
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/*
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* make a node to reference an immediate value i.
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*/
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AMODE *make_immed(__int64 i)
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{
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AMODE *ap;
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ENODE *ep;
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ep = xalloc(sizeof(struct enode));
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ep->nodetype = en_icon;
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ep->i = i;
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ap = allocAmode();
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ap->mode = am_immed;
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ap->offset = ep;
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return ap;
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}
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AMODE *make_indirect(int i)
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{
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AMODE *ap;
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ENODE *ep;
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ep = xalloc(sizeof(struct enode));
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ep->nodetype = en_uw_ref;
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ep->i = 0;
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ap = allocAmode();
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ap->mode = am_ind;
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ap->preg = i;
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ap->offset = ep;
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return ap;
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}
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AMODE *make_indexed(__int64 o, int i)
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{
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AMODE *ap;
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ENODE *ep;
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ep = xalloc(sizeof(struct enode));
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ep->nodetype = en_icon;
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ep->i = o;
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ap = allocAmode();
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ap->mode = am_indx;
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ap->preg = i;
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ap->offset = ep;
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return ap;
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}
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/*
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* make a direct reference to a node.
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*/
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AMODE *make_offset(ENODE *node)
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{
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AMODE *ap;
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ap = allocAmode();
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ap->mode = am_direct;
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ap->offset = node;
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return ap;
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}
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/*
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* MakeLegalAmode will coerce the addressing mode in ap1 into a
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* mode that is satisfactory for the flag word.
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*/
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void MakeLegalAmode(AMODE *ap,int flags, int size)
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{
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AMODE *ap2;
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__int64 i;
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if (ap==NULL) return;
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if( ((flags & F_VOL) == 0) || ap->tempflag )
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{
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switch( ap->mode ) {
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case am_immed:
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i = ((ENODE *)(ap->offset))->i;
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if (flags & F_IMMED18) {
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if (i < 0x1ffff && i > -0x1ffff)
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return;
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}
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else if( flags & F_IMMED )
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return; /* mode ok */
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break;
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case am_reg:
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if( flags & F_REG )
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return;
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break;
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case am_ind:
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case am_indx:
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case am_indx2:
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case am_direct:
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case am_indx3:
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if( flags & F_MEM )
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return;
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break;
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}
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}
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if( flags & F_REG )
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{
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ReleaseTempRegister(ap); /* maybe we can use it... */
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ap2 = GetTempRegister(); /* AllocateRegisterVars to dreg */
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if (ap->mode == am_ind || ap->mode==am_indx) {
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switch(size) {
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case 1: GenerateDiadic(op_lb,0,ap2,ap); break;
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case 2: GenerateDiadic(op_lc,0,ap2,ap); break;
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case 4: GenerateDiadic(op_lh,0,ap2,ap); break;
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case 8: GenerateDiadic(op_lw,0,ap2,ap); break;
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}
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}
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else if (ap->mode==am_immed)
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GenerateTriadic(op_ori,0,ap2,makereg(0),ap);
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else {
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if (ap->mode==am_reg)
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GenerateTriadic(op_or,0,ap2,ap,makereg(0));
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else {
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switch(size) {
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case 1: GenerateDiadic(op_lb,0,ap2,ap); break;
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case 2: GenerateDiadic(op_lc,0,ap2,ap); break;
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case 4: GenerateDiadic(op_lh,0,ap2,ap); break;
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case 8: GenerateDiadic(op_lw,0,ap2,ap); break;
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}
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}
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}
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ap->mode = am_reg;
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ap->preg = ap2->preg;
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ap->deep = ap2->deep;
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ap->tempflag = 1;
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return;
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}
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if( size == 1 )
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{
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ReleaseTempRegister(ap);
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ap2 = GetTempRegister();
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GenerateTriadic(op_or,0,ap2,ap,makereg(0));
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GenerateTriadic(op_sext8,0,ap2,ap2,NULL);
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ap->mode = ap2->mode;
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ap->preg = ap2->preg;
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ap->deep = ap2->deep;
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size = 2;
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}
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ap2 = GetTempRegister();
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switch(ap->mode) {
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case am_ind:
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case am_indx:
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switch(size) {
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case 1: GenerateDiadic(op_lb,0,ap2,ap); break;
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case 2: GenerateDiadic(op_lc,0,ap2,ap); break;
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case 4: GenerateDiadic(op_lh,0,ap2,ap); break;
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case 8: GenerateDiadic(op_lw,0,ap2,ap); break;
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}
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break;
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case am_immed:
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GenerateTriadic(op_ori,0,ap2,makereg(0),ap);
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case am_reg:
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GenerateTriadic(op_or,0,ap2,ap,makereg(0));
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default:
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switch(size) {
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case 1: GenerateDiadic(op_lb,0,ap2,ap); break;
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case 2: GenerateDiadic(op_lc,0,ap2,ap); break;
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case 4: GenerateDiadic(op_lh,0,ap2,ap); break;
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case 8: GenerateDiadic(op_lw,0,ap2,ap); break;
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}
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}
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ap->mode = am_reg;
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ap->preg = ap2->preg;
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ap->deep = ap2->deep;
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ap->tempflag = 1;
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}
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/*
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* if isize is not equal to osize then the operand ap will be
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* loaded into a register (if not already) and if osize is
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* greater than isize it will be extended to match.
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*/
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void GenerateSignExtend(AMODE *ap, int isize, int osize, int flags)
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{
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struct amode *ap2;
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| 244 |
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if( isize == osize )
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| 245 |
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return;
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| 246 |
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if(ap->mode != am_reg)
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MakeLegalAmode(ap,flags & F_REG,isize);
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switch( isize )
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{
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| 250 |
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case 1: GenerateDiadic(op_sext8,0,ap,ap); break;
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case 2: GenerateDiadic(op_sext16,0,ap,ap); break;
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| 252 |
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case 4: GenerateDiadic(op_sext32,0,ap,ap); break;
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| 253 |
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}
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| 254 |
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}
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| 255 |
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| 256 |
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/*
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| 257 |
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* return true if the node passed can be generated as a short
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| 258 |
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* offset.
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| 259 |
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*/
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| 260 |
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int isshort(ENODE *node)
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| 261 |
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{
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| 262 |
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return node->nodetype == en_icon &&
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| 263 |
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(node->i >= -32768 && node->i <= 32767);
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| 264 |
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}
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| 265 |
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| 266 |
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/*
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| 267 |
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* return true if the node passed can be evaluated as a byte
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| 268 |
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* offset.
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| 269 |
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*/
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| 270 |
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int isbyte(ENODE *node)
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| 271 |
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{
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| 272 |
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return node->nodetype == en_icon &&
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| 273 |
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(-128 <= node->i && node->i <= 127);
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| 274 |
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}
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| 275 |
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| 276 |
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int ischar(ENODE *node)
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| 277 |
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{
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| 278 |
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return node->nodetype == en_icon &&
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| 279 |
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(node->i >= -32768 && node->i <= 32767);
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| 280 |
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}
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| 281 |
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| 282 |
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/*
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| 283 |
|
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* generate code to evaluate an index node (^+) and return
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| 284 |
|
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* the addressing mode of the result. This routine takes no
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| 285 |
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* flags since it always returns either am_ind or am_indx.
|
| 286 |
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*/
|
| 287 |
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AMODE *GenerateIndex(ENODE *node)
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| 288 |
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{
|
| 289 |
|
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AMODE *ap1, *ap2, *ap3;
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| 290 |
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| 291 |
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if( (node->p[0]->nodetype == en_tempref || node->p[0]->nodetype==en_regvar) && (node->p[1]->nodetype == en_tempref || node->p[1]->nodetype==en_regvar))
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| 292 |
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{ /* both nodes are registers */
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| 293 |
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ap1 = GenerateExpression(node->p[0],F_REG,8);
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| 294 |
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ap2 = GenerateExpression(node->p[1],F_REG,8);
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| 295 |
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ap1->mode = am_indx2;
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| 296 |
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ap1->sreg = ap2->preg;
|
| 297 |
|
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ap1->offset = makeinode(en_icon,0);
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| 298 |
51 |
robfinch |
ap1->scale = node->scale;
|
| 299 |
37 |
robfinch |
return ap1;
|
| 300 |
|
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}
|
| 301 |
|
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ap1 = GenerateExpression(node->p[0],F_REG | F_IMMED,8);
|
| 302 |
|
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if( ap1->mode == am_immed )
|
| 303 |
|
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{
|
| 304 |
|
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ap2 = GenerateExpression(node->p[1],F_REG,8);
|
| 305 |
|
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ap2->mode = am_indx;
|
| 306 |
|
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ap2->offset = ap1->offset;
|
| 307 |
|
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ReleaseTempRegister(ap1);
|
| 308 |
|
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return ap2;
|
| 309 |
|
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}
|
| 310 |
|
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ap2 = GenerateExpression(node->p[1],F_ALL,8); /* get right op */
|
| 311 |
|
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if( ap2->mode == am_immed && ap1->mode == am_reg ) /* make am_indx */
|
| 312 |
|
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{
|
| 313 |
|
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ap2->mode = am_indx;
|
| 314 |
|
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ReleaseTempRegister(ap2);
|
| 315 |
|
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ap2->preg = ap1->preg;
|
| 316 |
|
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ap2->deep = ap1->deep;
|
| 317 |
|
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return ap2;
|
| 318 |
|
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}
|
| 319 |
|
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// ap1->mode must be F_REG
|
| 320 |
|
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MakeLegalAmode(ap2,F_REG,8);
|
| 321 |
|
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// ap3 = GetTempRegister();
|
| 322 |
|
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// GenerateTriadic(op_addu,0,ap3,ap1,ap2); /* add left to address reg */
|
| 323 |
|
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ap1->mode = am_indx2; /* make indirect */
|
| 324 |
|
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ap1->sreg = ap2->preg;
|
| 325 |
|
|
ap1->offset = makeinode(en_icon,0);
|
| 326 |
51 |
robfinch |
ap1->scale = node->scale;
|
| 327 |
37 |
robfinch |
// ReleaseTempRegister(ap2); /* release any temps in ap2 */
|
| 328 |
|
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// ReleaseTempRegister(ap1);
|
| 329 |
|
|
return ap1; /* return indirect */
|
| 330 |
|
|
}
|
| 331 |
|
|
|
| 332 |
|
|
long GetReferenceSize(ENODE *node)
|
| 333 |
|
|
{
|
| 334 |
|
|
switch( node->nodetype ) /* get load size */
|
| 335 |
|
|
{
|
| 336 |
|
|
case en_b_ref:
|
| 337 |
|
|
case en_ub_ref:
|
| 338 |
|
|
case en_bfieldref:
|
| 339 |
|
|
case en_ubfieldref:
|
| 340 |
|
|
return 1;
|
| 341 |
|
|
case en_c_ref:
|
| 342 |
|
|
case en_uc_ref:
|
| 343 |
|
|
case en_cfieldref:
|
| 344 |
|
|
case en_ucfieldref:
|
| 345 |
|
|
return 2;
|
| 346 |
|
|
case en_h_ref:
|
| 347 |
|
|
case en_uh_ref:
|
| 348 |
|
|
case en_hfieldref:
|
| 349 |
|
|
case en_uhfieldref:
|
| 350 |
|
|
return 4;
|
| 351 |
|
|
case en_w_ref:
|
| 352 |
|
|
case en_uw_ref:
|
| 353 |
|
|
case en_wfieldref:
|
| 354 |
|
|
case en_uwfieldref:
|
| 355 |
|
|
case en_tempref:
|
| 356 |
|
|
case en_regvar:
|
| 357 |
|
|
return 8;
|
| 358 |
|
|
}
|
| 359 |
|
|
return 8;
|
| 360 |
|
|
}
|
| 361 |
|
|
|
| 362 |
|
|
/*
|
| 363 |
|
|
* return the addressing mode of a dereferenced node.
|
| 364 |
|
|
*/
|
| 365 |
|
|
AMODE *GenerateDereference(ENODE *node,int flags,int size)
|
| 366 |
|
|
{
|
| 367 |
|
|
struct amode *ap1;
|
| 368 |
|
|
int siz1;
|
| 369 |
|
|
|
| 370 |
|
|
siz1 = GetReferenceSize(node);
|
| 371 |
|
|
if( node->p[0]->nodetype == en_add )
|
| 372 |
|
|
{
|
| 373 |
|
|
ap1 = GenerateIndex(node->p[0]);
|
| 374 |
|
|
GenerateSignExtend(ap1,siz1,size,flags);
|
| 375 |
|
|
MakeLegalAmode(ap1,flags,size);
|
| 376 |
|
|
return ap1;
|
| 377 |
|
|
}
|
| 378 |
|
|
else if( node->p[0]->nodetype == en_autocon )
|
| 379 |
|
|
{
|
| 380 |
|
|
ap1 = xalloc(sizeof(struct amode));
|
| 381 |
|
|
ap1->mode = am_indx;
|
| 382 |
|
|
ap1->preg = 27;
|
| 383 |
|
|
ap1->offset = makeinode(en_icon,node->p[0]->i);
|
| 384 |
|
|
GenerateSignExtend(ap1,siz1,size,flags);
|
| 385 |
|
|
MakeLegalAmode(ap1,flags,size);
|
| 386 |
|
|
return ap1;
|
| 387 |
|
|
}
|
| 388 |
|
|
ap1 = GenerateExpression(node->p[0],F_REG | F_IMMED,4); /* generate address */
|
| 389 |
|
|
if( ap1->mode == am_reg )
|
| 390 |
|
|
{
|
| 391 |
|
|
ap1->mode = am_ind;
|
| 392 |
|
|
GenerateSignExtend(ap1,siz1,size,flags);
|
| 393 |
|
|
MakeLegalAmode(ap1,flags,size);
|
| 394 |
|
|
return ap1;
|
| 395 |
|
|
}
|
| 396 |
|
|
ap1->mode = am_direct;
|
| 397 |
|
|
GenerateSignExtend(ap1,siz1,size,flags);
|
| 398 |
|
|
MakeLegalAmode(ap1,flags,size);
|
| 399 |
|
|
return ap1;
|
| 400 |
|
|
}
|
| 401 |
|
|
|
| 402 |
|
|
void SignExtendBitfield(ENODE *node, struct amode *ap3, __int64 mask)
|
| 403 |
|
|
{
|
| 404 |
|
|
struct amode *ap2;
|
| 405 |
|
|
__int64 umask;
|
| 406 |
|
|
|
| 407 |
|
|
umask = 0x8000000000000000L | ~(mask >> 1);
|
| 408 |
|
|
ap2 = GetTempRegister();
|
| 409 |
|
|
GenerateTriadic(op_ori,0,ap2,makereg(0),make_immed(umask));
|
| 410 |
|
|
GenerateTriadic(op_add,0,ap3,ap3,ap2);
|
| 411 |
|
|
GenerateTriadic(op_xor,0,ap3,ap3,ap2);
|
| 412 |
|
|
ReleaseTempRegister(ap2);
|
| 413 |
|
|
}
|
| 414 |
|
|
|
| 415 |
|
|
AMODE *GenerateBitfieldDereference(ENODE *node, int flags, int size)
|
| 416 |
|
|
{
|
| 417 |
|
|
AMODE *ap, *ap1,*ap2,*ap3;
|
| 418 |
|
|
long mask,umask;
|
| 419 |
|
|
int width = node->bit_width + 1;
|
| 420 |
|
|
int isSigned;
|
| 421 |
|
|
|
| 422 |
|
|
isSigned = node->nodetype==en_wfieldref || node->nodetype==en_hfieldref || node->nodetype==en_cfieldref || node->nodetype==en_bfieldref;
|
| 423 |
|
|
mask = 0;
|
| 424 |
|
|
while (--width) mask = mask + mask + 1;
|
| 425 |
|
|
ap = GenerateDereference(node, flags, node->esize);
|
| 426 |
|
|
MakeLegalAmode(ap, flags, node->esize);
|
| 427 |
|
|
ap3 = GetTempRegister();
|
| 428 |
|
|
GenerateTriadic(op_or,0,ap3,ap,makereg(0));
|
| 429 |
|
|
ReleaseTempRegister(ap);
|
| 430 |
|
|
if (node->bit_offset > 0) {
|
| 431 |
|
|
GenerateDiadic(op_shru, 0, ap3, make_immed((__int64) node->bit_offset));
|
| 432 |
|
|
GenerateDiadic(op_and, 0, ap3, make_immed(mask));
|
| 433 |
|
|
//MakeLegalAmode(ap, flags, node->esize);
|
| 434 |
|
|
if (isSigned)
|
| 435 |
|
|
SignExtendBitfield(node, ap3, mask);
|
| 436 |
|
|
}
|
| 437 |
|
|
else {
|
| 438 |
|
|
GenerateTriadic(op_and, 0, ap3, ap3, make_immed(mask));
|
| 439 |
|
|
if (isSigned)
|
| 440 |
|
|
SignExtendBitfield(node, ap3, mask);
|
| 441 |
|
|
}
|
| 442 |
|
|
//mask = 0;
|
| 443 |
|
|
//while (--width) mask = mask + mask + 1;
|
| 444 |
|
|
// GenerateDiadic(op_and, (int) node->esize, make_immed(mask), ap);
|
| 445 |
|
|
MakeLegalAmode(ap3, flags, node->esize);
|
| 446 |
|
|
return ap3;
|
| 447 |
|
|
}
|
| 448 |
|
|
|
| 449 |
|
|
/*
|
| 450 |
|
|
* generate code to evaluate a unary minus or complement.
|
| 451 |
|
|
*/
|
| 452 |
|
|
AMODE *GenerateUnary(ENODE *node,int flags, int size, int op)
|
| 453 |
|
|
{
|
| 454 |
|
|
AMODE *ap,*ap1;
|
| 455 |
|
|
ap = GenerateExpression(node->p[0],F_REG,size);
|
| 456 |
|
|
ap1 = GetTempRegister();
|
| 457 |
|
|
GenerateDiadic(op,0,ap1,ap);
|
| 458 |
|
|
ReleaseTempRegister(ap);
|
| 459 |
|
|
MakeLegalAmode(ap1,flags,size);
|
| 460 |
|
|
return ap1;
|
| 461 |
|
|
}
|
| 462 |
|
|
|
| 463 |
|
|
AMODE *GenerateBinary(ENODE *node,int flags, int size, int op)
|
| 464 |
|
|
{
|
| 465 |
|
|
AMODE *ap1, *ap2, *ap3;
|
| 466 |
|
|
int op2;
|
| 467 |
|
|
ap1 = GenerateExpression(node->p[0],F_REG,size);
|
| 468 |
|
|
ap2 = GenerateExpression(node->p[1],F_REG|F_IMMED,size);
|
| 469 |
|
|
ap3 = GetTempRegister();
|
| 470 |
|
|
GenerateTriadic(op,0,ap3,ap1,ap2);
|
| 471 |
|
|
ReleaseTempRegister(ap1);
|
| 472 |
|
|
ReleaseTempRegister(ap2);
|
| 473 |
|
|
MakeLegalAmode(ap3,flags,size);
|
| 474 |
|
|
return ap3;
|
| 475 |
|
|
}
|
| 476 |
|
|
|
| 477 |
|
|
/*
|
| 478 |
|
|
* generate code to evaluate a mod operator or a divide
|
| 479 |
|
|
* operator.
|
| 480 |
|
|
*/
|
| 481 |
|
|
AMODE *GenerateModDiv(ENODE *node,int flags,int size, int op)
|
| 482 |
|
|
{
|
| 483 |
51 |
robfinch |
AMODE *ap1, *ap2, *ap3;
|
| 484 |
37 |
robfinch |
|
| 485 |
|
|
if( node->p[0]->nodetype == en_icon )
|
| 486 |
|
|
swap_nodes(node);
|
| 487 |
|
|
ap1 = GenerateExpression(node->p[0],F_REG,8);
|
| 488 |
|
|
ap2 = GenerateExpression(node->p[1],F_REG | F_IMMED,8);
|
| 489 |
51 |
robfinch |
ap3 = GetTempRegister();
|
| 490 |
|
|
GenerateTriadic(op,0,ap3,ap1,ap2);
|
| 491 |
|
|
// GenerateDiadic(op_ext,0,ap3,0);
|
| 492 |
|
|
MakeLegalAmode(ap3,flags,4);
|
| 493 |
|
|
ReleaseTempRegister(ap1);
|
| 494 |
37 |
robfinch |
ReleaseTempRegister(ap2);
|
| 495 |
51 |
robfinch |
return ap3;
|
| 496 |
37 |
robfinch |
}
|
| 497 |
|
|
|
| 498 |
|
|
/*
|
| 499 |
|
|
* exchange the two operands in a node.
|
| 500 |
|
|
*/
|
| 501 |
|
|
void swap_nodes(ENODE *node)
|
| 502 |
|
|
{
|
| 503 |
|
|
ENODE *temp;
|
| 504 |
|
|
temp = node->p[0];
|
| 505 |
|
|
node->p[0] = node->p[1];
|
| 506 |
|
|
node->p[1] = temp;
|
| 507 |
|
|
}
|
| 508 |
|
|
|
| 509 |
|
|
/*
|
| 510 |
|
|
* generate code to evaluate a multiply node. both operands
|
| 511 |
|
|
* are treated as words and the result is long and is always
|
| 512 |
|
|
* in a register so that the 68000 mul instruction can be used.
|
| 513 |
|
|
*/
|
| 514 |
|
|
AMODE *GenerateMultiply(ENODE *node, int flags, int size, int op)
|
| 515 |
|
|
{
|
| 516 |
|
|
AMODE *ap1, *ap2, *ap3;
|
| 517 |
|
|
if( node->p[0]->nodetype == en_icon )
|
| 518 |
|
|
swap_nodes(node);
|
| 519 |
|
|
ap1 = GenerateExpression(node->p[0],F_REG,8);
|
| 520 |
|
|
ap2 = GenerateExpression(node->p[1],F_REG | F_IMMED,8);
|
| 521 |
|
|
ap3 = GetTempRegister();
|
| 522 |
|
|
if (ap2->mode == am_immed) {
|
| 523 |
|
|
if (op==op_mulu)
|
| 524 |
|
|
GenerateTriadic(op_mului,0,ap3,ap1,ap2);
|
| 525 |
|
|
else
|
| 526 |
|
|
GenerateTriadic(op_mulsi,0,ap3,ap1,ap2);
|
| 527 |
|
|
}
|
| 528 |
|
|
else
|
| 529 |
|
|
GenerateTriadic(op,0,ap3,ap1,ap2);
|
| 530 |
|
|
ReleaseTempRegister(ap1);
|
| 531 |
|
|
ReleaseTempRegister(ap2);
|
| 532 |
|
|
MakeLegalAmode(ap3,flags,8);
|
| 533 |
|
|
return ap3;
|
| 534 |
|
|
}
|
| 535 |
|
|
|
| 536 |
|
|
/*
|
| 537 |
|
|
* generate code to evaluate a condition operator node (?:)
|
| 538 |
|
|
*/
|
| 539 |
|
|
AMODE *gen_hook(ENODE *node,int flags, int size)
|
| 540 |
|
|
{
|
| 541 |
|
|
AMODE *ap1, *ap2;
|
| 542 |
|
|
int false_label, end_label;
|
| 543 |
|
|
|
| 544 |
|
|
false_label = nextlabel++;
|
| 545 |
|
|
end_label = nextlabel++;
|
| 546 |
|
|
flags = (flags & F_REG) | F_VOL;
|
| 547 |
|
|
GenerateFalseJump(node->p[0],false_label);
|
| 548 |
|
|
node = node->p[1];
|
| 549 |
|
|
ap1 = GenerateExpression(node->p[0],flags,size);
|
| 550 |
|
|
ReleaseTempRegister(ap1);
|
| 551 |
|
|
GenerateDiadic(op_bra,0,make_label(end_label),0);
|
| 552 |
|
|
GenerateLabel(false_label);
|
| 553 |
|
|
ap2 = GenerateExpression(node->p[1],flags,size);
|
| 554 |
|
|
if( !equal_address(ap1,ap2) )
|
| 555 |
|
|
{
|
| 556 |
|
|
ReleaseTempRegister(ap2);
|
| 557 |
|
|
// GetTempRegister();
|
| 558 |
|
|
GenerateTriadic(op_or,0,ap1,makereg(0),ap2);
|
| 559 |
|
|
}
|
| 560 |
|
|
GenerateLabel(end_label);
|
| 561 |
|
|
return ap1;
|
| 562 |
|
|
}
|
| 563 |
|
|
|
| 564 |
|
|
AMODE *GenerateAssignAdd(ENODE *node,int flags, int size, int op)
|
| 565 |
|
|
{
|
| 566 |
|
|
AMODE *ap1, *ap2, *ap3;
|
| 567 |
|
|
int ssize, mask0, mask1;
|
| 568 |
|
|
ssize = GetNaturalSize(node->p[0]);
|
| 569 |
|
|
if( ssize > size )
|
| 570 |
|
|
size = ssize;
|
| 571 |
|
|
ap1 = GenerateExpression(node->p[0],F_ALL,ssize);
|
| 572 |
|
|
ap2 = GenerateExpression(node->p[1],F_REG | F_IMMED,size);
|
| 573 |
|
|
if (ap2->mode ==am_immed)
|
| 574 |
|
|
switch(op) {
|
| 575 |
|
|
case op_addu: op = op_addui; break;
|
| 576 |
|
|
case op_add: op = op_addui; break;
|
| 577 |
|
|
case op_subu: op = op_subui; break;
|
| 578 |
|
|
case op_sub: op = op_subui; break;
|
| 579 |
|
|
}
|
| 580 |
|
|
if (ap1->mode==am_reg) {
|
| 581 |
|
|
GenerateTriadic(op,0,ap1,ap1,ap2);
|
| 582 |
|
|
}
|
| 583 |
|
|
else {
|
| 584 |
|
|
ap3 = GetTempRegister();
|
| 585 |
|
|
switch(ssize) {
|
| 586 |
|
|
case 1: GenerateDiadic(op_lb,0,ap3,ap1); break;
|
| 587 |
|
|
case 2: GenerateDiadic(op_lc,0,ap3,ap1); break;
|
| 588 |
|
|
case 4: GenerateDiadic(op_lh,0,ap3,ap1); break;
|
| 589 |
|
|
case 8: GenerateDiadic(op_lw,0,ap3,ap1); break;
|
| 590 |
|
|
}
|
| 591 |
|
|
GenerateTriadic(op,0,ap3,ap3,ap2);
|
| 592 |
|
|
switch(ssize) {
|
| 593 |
|
|
case 1: GenerateDiadic(op_sb,0,ap3,ap1); break;
|
| 594 |
|
|
case 2: GenerateDiadic(op_sc,0,ap3,ap1); break;
|
| 595 |
|
|
case 4: GenerateDiadic(op_sh,0,ap3,ap1); break;
|
| 596 |
|
|
case 8: GenerateDiadic(op_sw,0,ap3,ap1); break;
|
| 597 |
|
|
}
|
| 598 |
|
|
ReleaseTempRegister(ap3);
|
| 599 |
|
|
}
|
| 600 |
|
|
ReleaseTempRegister(ap2);
|
| 601 |
|
|
GenerateSignExtend(ap1,ssize,size,flags);
|
| 602 |
|
|
MakeLegalAmode(ap1,flags,size);
|
| 603 |
|
|
return ap1;
|
| 604 |
|
|
}
|
| 605 |
|
|
|
| 606 |
|
|
AMODE *GenerateAssignLogic(ENODE *node,int flags, int size, int op)
|
| 607 |
|
|
{
|
| 608 |
|
|
AMODE *ap1, *ap2, *ap3;
|
| 609 |
|
|
int ssize, mask0, mask1;
|
| 610 |
|
|
ssize = GetNaturalSize(node->p[0]);
|
| 611 |
|
|
if( ssize > size )
|
| 612 |
|
|
size = ssize;
|
| 613 |
|
|
ap1 = GenerateExpression(node->p[0],F_ALL,ssize);
|
| 614 |
|
|
ap2 = GenerateExpression(node->p[1],F_REG | F_IMMED,size);
|
| 615 |
|
|
if (ap2->mode==am_immed)
|
| 616 |
|
|
switch(op) {
|
| 617 |
|
|
case op_and: op = op_andi; break;
|
| 618 |
|
|
case op_or: op = op_ori; break;
|
| 619 |
|
|
case op_xor: op = op_xori; break;
|
| 620 |
|
|
}
|
| 621 |
|
|
if (ap1->mode==am_reg) {
|
| 622 |
|
|
GenerateTriadic(op,0,ap1,ap1,ap2);
|
| 623 |
|
|
}
|
| 624 |
|
|
else {
|
| 625 |
|
|
ap3 = GetTempRegister();
|
| 626 |
|
|
switch(ssize) {
|
| 627 |
|
|
case 1: GenerateDiadic(op_lb,0,ap3,ap1); break;
|
| 628 |
|
|
case 2: GenerateDiadic(op_lc,0,ap3,ap1); break;
|
| 629 |
|
|
case 4: GenerateDiadic(op_lh,0,ap3,ap1); break;
|
| 630 |
|
|
case 8: GenerateDiadic(op_lw,0,ap3,ap1); break;
|
| 631 |
|
|
}
|
| 632 |
|
|
GenerateTriadic(op,0,ap3,ap3,ap2);
|
| 633 |
|
|
switch(ssize) {
|
| 634 |
|
|
case 1: GenerateDiadic(op_sb,0,ap3,ap1); break;
|
| 635 |
|
|
case 2: GenerateDiadic(op_sc,0,ap3,ap1); break;
|
| 636 |
|
|
case 4: GenerateDiadic(op_sh,0,ap3,ap1); break;
|
| 637 |
|
|
case 8: GenerateDiadic(op_sw,0,ap3,ap1); break;
|
| 638 |
|
|
}
|
| 639 |
|
|
ReleaseTempRegister(ap3);
|
| 640 |
|
|
}
|
| 641 |
|
|
ReleaseTempRegister(ap2);
|
| 642 |
|
|
GenerateSignExtend(ap1,ssize,size,flags);
|
| 643 |
|
|
MakeLegalAmode(ap1,flags,size);
|
| 644 |
|
|
return ap1;
|
| 645 |
|
|
}
|
| 646 |
|
|
|
| 647 |
|
|
/*
|
| 648 |
|
|
* generate a *= node.
|
| 649 |
|
|
*/
|
| 650 |
|
|
AMODE *GenerateAssignMultiply(ENODE *node,int flags, int size, int op)
|
| 651 |
|
|
{
|
| 652 |
|
|
AMODE *ap1, *ap2, *ap3;
|
| 653 |
|
|
int ssize, mask0, mask1;
|
| 654 |
|
|
ssize = GetNaturalSize(node->p[0]);
|
| 655 |
|
|
if( ssize > size )
|
| 656 |
|
|
size = ssize;
|
| 657 |
|
|
ap1 = GenerateExpression(node->p[0],F_ALL,ssize);
|
| 658 |
|
|
ap2 = GenerateExpression(node->p[1],F_REG | F_IMMED,size);
|
| 659 |
|
|
if (ap2->mode==am_immed)
|
| 660 |
|
|
switch(op) {
|
| 661 |
|
|
case op_mulu: op = op_mului; break;
|
| 662 |
|
|
case op_muls: op = op_mulsi; break;
|
| 663 |
|
|
}
|
| 664 |
|
|
if (ap1->mode==am_reg) {
|
| 665 |
|
|
GenerateTriadic(op,0,ap1,ap1,ap2);
|
| 666 |
|
|
}
|
| 667 |
|
|
else {
|
| 668 |
|
|
ap3 = GetTempRegister();
|
| 669 |
|
|
switch(ssize) {
|
| 670 |
|
|
case 1: GenerateDiadic(op_lb,0,ap3,ap1); break;
|
| 671 |
|
|
case 2: GenerateDiadic(op_lc,0,ap3,ap1); break;
|
| 672 |
|
|
case 4: GenerateDiadic(op_lh,0,ap3,ap1); break;
|
| 673 |
|
|
case 8: GenerateDiadic(op_lw,0,ap3,ap1); break;
|
| 674 |
|
|
}
|
| 675 |
|
|
GenerateTriadic(op,0,ap3,ap3,ap2);
|
| 676 |
|
|
switch(ssize) {
|
| 677 |
|
|
case 1: GenerateDiadic(op_sb,0,ap3,ap1); break;
|
| 678 |
|
|
case 2: GenerateDiadic(op_sc,0,ap3,ap1); break;
|
| 679 |
|
|
case 4: GenerateDiadic(op_sh,0,ap3,ap1); break;
|
| 680 |
|
|
case 8: GenerateDiadic(op_sw,0,ap3,ap1); break;
|
| 681 |
|
|
}
|
| 682 |
|
|
ReleaseTempRegister(ap3);
|
| 683 |
|
|
}
|
| 684 |
|
|
ReleaseTempRegister(ap2);
|
| 685 |
|
|
GenerateSignExtend(ap1,ssize,size,flags);
|
| 686 |
|
|
MakeLegalAmode(ap1,flags,size);
|
| 687 |
|
|
return ap1;
|
| 688 |
|
|
}
|
| 689 |
|
|
|
| 690 |
|
|
/*
|
| 691 |
|
|
* generate /= and %= nodes.
|
| 692 |
|
|
*/
|
| 693 |
|
|
AMODE *gen_asmodiv(ENODE *node,int flags,int size,int op)
|
| 694 |
|
|
{
|
| 695 |
|
|
AMODE *ap1, *ap2, *ap3;
|
| 696 |
|
|
int siz1;
|
| 697 |
|
|
|
| 698 |
|
|
siz1 = GetNaturalSize(node->p[0]);
|
| 699 |
|
|
ap1 = GetTempRegister();
|
| 700 |
|
|
ap2 = GenerateExpression(node->p[0],F_ALL & ~F_IMMED,siz1);
|
| 701 |
|
|
if (ap2->mode==am_reg && ap2->preg != ap1->preg)
|
| 702 |
|
|
GenerateTriadic(op_or,0,ap1,ap2,makereg(0));
|
| 703 |
|
|
else {
|
| 704 |
|
|
switch(siz1) {
|
| 705 |
|
|
case 1: GenerateDiadic(op_lb,0,ap1,ap2); break;
|
| 706 |
|
|
case 2: GenerateDiadic(op_lc,0,ap1,ap2); break;
|
| 707 |
|
|
case 4: GenerateDiadic(op_lh,0,ap1,ap2); break;
|
| 708 |
|
|
case 8: GenerateDiadic(op_lw,0,ap1,ap2); break;
|
| 709 |
|
|
}
|
| 710 |
|
|
}
|
| 711 |
|
|
GenerateSignExtend(ap1,siz1,8,flags);
|
| 712 |
|
|
ap3 = GenerateExpression(node->p[1],F_REG,2);
|
| 713 |
|
|
GenerateTriadic(op,0,ap1,ap1,ap3);
|
| 714 |
|
|
ReleaseTempRegister(ap3);
|
| 715 |
|
|
//GenerateDiadic(op_ext,0,ap1,0);
|
| 716 |
|
|
if (ap2->mode==am_reg)
|
| 717 |
|
|
GenerateTriadic(op_or,0,ap2,ap1,makereg(0));
|
| 718 |
|
|
else
|
| 719 |
|
|
switch(siz1) {
|
| 720 |
|
|
case 1: GenerateDiadic(op_sb,0,ap1,ap2); break;
|
| 721 |
|
|
case 2: GenerateDiadic(op_sc,0,ap1,ap2); break;
|
| 722 |
|
|
case 4: GenerateDiadic(op_sh,0,ap1,ap2); break;
|
| 723 |
|
|
case 8: GenerateDiadic(op_sw,0,ap1,ap2); break;
|
| 724 |
|
|
}
|
| 725 |
|
|
ReleaseTempRegister(ap2);
|
| 726 |
|
|
MakeLegalAmode(ap1,flags,size);
|
| 727 |
|
|
return ap1;
|
| 728 |
|
|
}
|
| 729 |
|
|
|
| 730 |
|
|
/*
|
| 731 |
|
|
* generate code for an assignment node. if the size of the
|
| 732 |
|
|
* assignment destination is larger than the size passed then
|
| 733 |
|
|
* everything below this node will be evaluated with the
|
| 734 |
|
|
* assignment size.
|
| 735 |
|
|
*/
|
| 736 |
|
|
AMODE *GenerateAssign(ENODE *node, int flags, int size)
|
| 737 |
|
|
{ struct amode *ap1, *ap2 ,*ap3;
|
| 738 |
|
|
int ssize;
|
| 739 |
|
|
ENODE *ep;
|
| 740 |
|
|
if (node->p[0]->nodetype == en_uwfieldref ||
|
| 741 |
|
|
node->p[0]->nodetype == en_wfieldref ||
|
| 742 |
|
|
node->p[0]->nodetype == en_uhfieldref ||
|
| 743 |
|
|
node->p[0]->nodetype == en_hfieldref ||
|
| 744 |
|
|
node->p[0]->nodetype == en_ucfieldref ||
|
| 745 |
|
|
node->p[0]->nodetype == en_cfieldref ||
|
| 746 |
|
|
node->p[0]->nodetype == en_ubfieldref ||
|
| 747 |
|
|
node->p[0]->nodetype == en_bfieldref) {
|
| 748 |
|
|
long mask;
|
| 749 |
|
|
int i;
|
| 750 |
|
|
/*
|
| 751 |
|
|
* Field assignment
|
| 752 |
|
|
*/
|
| 753 |
|
|
/* get the value */
|
| 754 |
|
|
ap1 = GenerateExpression(node->p[1], F_REG | F_VOL,8);
|
| 755 |
|
|
i = node->p[0]->bit_width;
|
| 756 |
|
|
for (mask = 0; i--; mask = mask + mask + 1);
|
| 757 |
|
|
GenerateDiadic(op_and, 0, make_immed(mask), ap1);
|
| 758 |
|
|
mask <<= node->p[0]->bit_offset;
|
| 759 |
|
|
if (!(flags & F_NOVALUE)) {
|
| 760 |
|
|
/*
|
| 761 |
|
|
* result value needed
|
| 762 |
|
|
*/
|
| 763 |
|
|
ap3 = GetTempRegister();
|
| 764 |
|
|
GenerateTriadic(op_or, 0, ap3, ap1, makereg(0));
|
| 765 |
|
|
} else
|
| 766 |
|
|
ap3 = ap1;
|
| 767 |
|
|
if (node->p[0]->bit_offset > 0) {
|
| 768 |
|
|
if (node->p[0]->bit_offset < 9) {
|
| 769 |
|
|
GenerateTriadic(op_shl, 0, ap3,ap3,make_immed((long) node->p[0]->bit_offset));
|
| 770 |
|
|
}
|
| 771 |
|
|
else {
|
| 772 |
|
|
ap2 = GetTempRegister();
|
| 773 |
|
|
GenerateTriadic(op_ori, 0, ap2,makereg(0),make_immed((long) node->p[0]->bit_offset));
|
| 774 |
|
|
GenerateTriadic(op_shl, 0, ap3, ap3, ap2);
|
| 775 |
|
|
ReleaseTempRegister(ap2);
|
| 776 |
|
|
}
|
| 777 |
|
|
}
|
| 778 |
|
|
ep = makenode(en_w_ref, node->p[0]->p[0], NULL);
|
| 779 |
|
|
ap2 = GenerateExpression(ep, F_MEM,8);
|
| 780 |
|
|
//ap2 = GenerateExpression(node->v.p[0],F_ALL,4);
|
| 781 |
|
|
GenerateTriadic(op_andi, 0, ap2,ap2,make_immed(~mask));
|
| 782 |
|
|
GenerateTriadic(op_or, 0, ap2, ap2, ap3);
|
| 783 |
|
|
ReleaseTempRegister(ap2);
|
| 784 |
|
|
if (!(flags & F_NOVALUE)) {
|
| 785 |
|
|
ReleaseTempRegister(ap3);
|
| 786 |
|
|
}
|
| 787 |
|
|
MakeLegalAmode(ap1, flags, size);
|
| 788 |
|
|
return ap1;
|
| 789 |
|
|
}
|
| 790 |
|
|
|
| 791 |
|
|
ssize = GetReferenceSize(node->p[0]);
|
| 792 |
|
|
if( ssize > size )
|
| 793 |
|
|
size = ssize;
|
| 794 |
|
|
ap2 = GenerateExpression(node->p[1],F_REG,size);
|
| 795 |
|
|
ap1 = GenerateExpression(node->p[0],F_ALL,ssize);
|
| 796 |
|
|
if (ap1->mode == am_reg) {
|
| 797 |
|
|
GenerateDiadic(op_mov,0,ap1,ap2);
|
| 798 |
|
|
}
|
| 799 |
|
|
else {
|
| 800 |
|
|
switch(size) {
|
| 801 |
|
|
case 1: GenerateDiadic(op_sb,0,ap2,ap1); break;
|
| 802 |
|
|
case 2: GenerateDiadic(op_sc,0,ap2,ap1); break;
|
| 803 |
|
|
case 4: GenerateDiadic(op_sh,0,ap2,ap1); break;
|
| 804 |
|
|
case 8: GenerateDiadic(op_sw,0,ap2,ap1); break;
|
| 805 |
|
|
}
|
| 806 |
|
|
}
|
| 807 |
|
|
ReleaseTempRegister(ap1);
|
| 808 |
|
|
return ap2;
|
| 809 |
|
|
}
|
| 810 |
|
|
|
| 811 |
|
|
/*
|
| 812 |
|
|
* generate an auto increment or decrement node. op should be
|
| 813 |
|
|
* either op_add (for increment) or op_sub (for decrement).
|
| 814 |
|
|
*/
|
| 815 |
|
|
AMODE *GenerateAutoIncrement(ENODE *node,int flags,int size,int op)
|
| 816 |
|
|
{
|
| 817 |
|
|
AMODE *ap1, *ap2;
|
| 818 |
|
|
int siz1;
|
| 819 |
|
|
|
| 820 |
|
|
siz1 = GetNaturalSize(node->p[0]);
|
| 821 |
|
|
if( flags & F_NOVALUE ) /* dont need result */
|
| 822 |
|
|
{
|
| 823 |
|
|
ap1 = GenerateExpression(node->p[0],F_ALL,siz1);
|
| 824 |
|
|
switch(op) {
|
| 825 |
|
|
case op_addu: op = op_addui; break;
|
| 826 |
|
|
case op_add: op = op_addui; break;
|
| 827 |
|
|
case op_subu: op = op_subui; break;
|
| 828 |
|
|
case op_sub: op = op_subui; break;
|
| 829 |
|
|
}
|
| 830 |
|
|
if (ap1->mode != am_reg) {
|
| 831 |
|
|
ap2 = GetTempRegister();
|
| 832 |
|
|
switch(size) {
|
| 833 |
|
|
case 1: GenerateTriadic(op_lb,0,ap2,ap1,NULL); break;
|
| 834 |
|
|
case 2: GenerateTriadic(op_lc,0,ap2,ap1,NULL); break;
|
| 835 |
|
|
case 4: GenerateTriadic(op_lh,0,ap2,ap1,NULL); break;
|
| 836 |
|
|
case 8: GenerateTriadic(op_lw,0,ap2,ap1,NULL); break;
|
| 837 |
|
|
}
|
| 838 |
|
|
GenerateTriadic(op,0,ap2,ap2,make_immed(node->i));
|
| 839 |
|
|
switch(size) {
|
| 840 |
|
|
case 1: GenerateTriadic(op_sb,0,ap2,ap1,NULL); break;
|
| 841 |
|
|
case 2: GenerateTriadic(op_sc,0,ap2,ap1,NULL); break;
|
| 842 |
|
|
case 4: GenerateTriadic(op_sh,0,ap2,ap1,NULL); break;
|
| 843 |
|
|
case 8: GenerateTriadic(op_sw,0,ap2,ap1,NULL); break;
|
| 844 |
|
|
}
|
| 845 |
|
|
ReleaseTempRegister(ap2);
|
| 846 |
|
|
}
|
| 847 |
|
|
else
|
| 848 |
|
|
GenerateTriadic(op,0,ap1,ap1,make_immed(node->i));
|
| 849 |
|
|
ReleaseTempRegister(ap1);
|
| 850 |
|
|
return ap1;
|
| 851 |
|
|
}
|
| 852 |
|
|
ap2 = GenerateExpression(node->p[0],F_ALL,siz1);
|
| 853 |
|
|
if (ap2->mode == am_reg) {
|
| 854 |
|
|
GenerateTriadic(op,0,ap2,ap2,make_immed(node->i));
|
| 855 |
|
|
return ap2;
|
| 856 |
|
|
}
|
| 857 |
|
|
else {
|
| 858 |
|
|
ap1 = GetTempRegister();
|
| 859 |
|
|
switch(siz1) {
|
| 860 |
|
|
case 1: GenerateDiadic(op_lb,0,ap1,ap2); break;
|
| 861 |
|
|
case 2: GenerateDiadic(op_lc,0,ap1,ap2); break;
|
| 862 |
|
|
case 4: GenerateDiadic(op_lh,0,ap1,ap2); break;
|
| 863 |
|
|
case 8: GenerateDiadic(op_lw,0,ap1,ap2); break;
|
| 864 |
|
|
}
|
| 865 |
|
|
switch(op) {
|
| 866 |
|
|
case op_addu: op = op_addui; break;
|
| 867 |
|
|
case op_add: op = op_addui; break;
|
| 868 |
|
|
case op_subu: op = op_subui; break;
|
| 869 |
|
|
case op_sub: op = op_subui; break;
|
| 870 |
|
|
}
|
| 871 |
|
|
GenerateTriadic(op,0,ap1,ap1,make_immed(node->i));
|
| 872 |
|
|
switch(siz1) {
|
| 873 |
|
|
case 1: GenerateDiadic(op_sb,0,ap1,ap2); break;
|
| 874 |
|
|
case 2: GenerateDiadic(op_sc,0,ap1,ap2); break;
|
| 875 |
|
|
case 4: GenerateDiadic(op_sh,0,ap1,ap2); break;
|
| 876 |
|
|
case 8: GenerateDiadic(op_sw,0,ap1,ap2); break;
|
| 877 |
|
|
}
|
| 878 |
|
|
}
|
| 879 |
|
|
ReleaseTempRegister(ap2);
|
| 880 |
|
|
GenerateSignExtend(ap1,siz1,size,flags);
|
| 881 |
|
|
return ap1;
|
| 882 |
|
|
}
|
| 883 |
|
|
|
| 884 |
|
|
/*
|
| 885 |
|
|
* general expression evaluation. returns the addressing mode
|
| 886 |
|
|
* of the result.
|
| 887 |
|
|
*/
|
| 888 |
|
|
AMODE *GenerateExpression(ENODE *node, int flags, int size)
|
| 889 |
|
|
{
|
| 890 |
|
|
AMODE *ap1, *ap2;
|
| 891 |
|
|
int lab0, lab1;
|
| 892 |
|
|
int natsize;
|
| 893 |
|
|
|
| 894 |
|
|
if( node == NULL )
|
| 895 |
|
|
{
|
| 896 |
|
|
printf("DIAG - null node in GenerateExpression.\n");
|
| 897 |
|
|
return NULL;
|
| 898 |
|
|
}
|
| 899 |
|
|
switch( node->nodetype )
|
| 900 |
|
|
{
|
| 901 |
|
|
case en_icon:
|
| 902 |
|
|
case en_labcon:
|
| 903 |
|
|
case en_nacon:
|
| 904 |
|
|
ap1 = allocAmode();
|
| 905 |
|
|
ap1->mode = am_immed;
|
| 906 |
|
|
ap1->offset = node;
|
| 907 |
|
|
MakeLegalAmode(ap1,flags,size);
|
| 908 |
|
|
return ap1;
|
| 909 |
|
|
case en_autocon:
|
| 910 |
|
|
ap1 = GetTempRegister();
|
| 911 |
|
|
ap2 = allocAmode();
|
| 912 |
|
|
ap2->mode = am_indx;
|
| 913 |
|
|
ap2->preg = 27; /* frame pointer */
|
| 914 |
|
|
ap2->offset = node; /* use as constant node */
|
| 915 |
|
|
GenerateDiadic(op_lea,0,ap1,ap2);
|
| 916 |
|
|
MakeLegalAmode(ap1,flags,size);
|
| 917 |
|
|
return ap1; /* return reg */
|
| 918 |
|
|
case en_b_ref:
|
| 919 |
|
|
case en_c_ref:
|
| 920 |
|
|
case en_h_ref:
|
| 921 |
|
|
case en_ub_ref:
|
| 922 |
|
|
case en_uc_ref:
|
| 923 |
|
|
case en_uh_ref:
|
| 924 |
|
|
case en_w_ref:
|
| 925 |
|
|
case en_uw_ref:
|
| 926 |
|
|
return GenerateDereference(node,flags,size);
|
| 927 |
|
|
case en_uwfieldref:
|
| 928 |
|
|
case en_wfieldref:
|
| 929 |
|
|
case en_bfieldref:
|
| 930 |
|
|
case en_ubfieldref:
|
| 931 |
|
|
case en_cfieldref:
|
| 932 |
|
|
case en_ucfieldref:
|
| 933 |
|
|
case en_hfieldref:
|
| 934 |
|
|
case en_uhfieldref:
|
| 935 |
|
|
return GenerateBitfieldDereference(node,flags,size);
|
| 936 |
|
|
case en_regvar:
|
| 937 |
|
|
case en_tempref:
|
| 938 |
|
|
ap1 = xalloc(sizeof(struct amode));
|
| 939 |
|
|
ap1->mode = am_reg;
|
| 940 |
|
|
ap1->preg = node->i;
|
| 941 |
|
|
ap1->tempflag = 0; /* not a temporary */
|
| 942 |
|
|
MakeLegalAmode(ap1,flags,size);
|
| 943 |
|
|
return ap1;
|
| 944 |
|
|
case en_uminus: return GenerateUnary(node,flags,size,op_neg);
|
| 945 |
|
|
case en_compl: return GenerateUnary(node,flags,size,op_not);
|
| 946 |
|
|
case en_add: return GenerateBinary(node,flags,size,op_add);
|
| 947 |
|
|
case en_sub: return GenerateBinary(node,flags,size,op_sub);
|
| 948 |
|
|
case en_and: return GenerateBinary(node,flags,size,op_and);
|
| 949 |
|
|
case en_or: return GenerateBinary(node,flags,size,op_or);
|
| 950 |
|
|
case en_xor: return GenerateBinary(node,flags,size,op_xor);
|
| 951 |
|
|
case en_mul: return GenerateMultiply(node,flags,size,op_muls);
|
| 952 |
|
|
case en_mulu: return GenerateMultiply(node,flags,size,op_mulu);
|
| 953 |
|
|
case en_div: return GenerateModDiv(node,flags,size,op_divs);
|
| 954 |
|
|
case en_udiv: return GenerateModDiv(node,flags,size,op_divu);
|
| 955 |
|
|
case en_mod: return GenerateModDiv(node,flags,size,op_mod);
|
| 956 |
|
|
case en_umod: return GenerateModDiv(node,flags,size,op_modu);
|
| 957 |
|
|
case en_shl: return GenerateShift(node,flags,size,op_shl);
|
| 958 |
|
|
case en_shr: return GenerateShift(node,flags,size,op_shr);
|
| 959 |
|
|
case en_shru: return GenerateShift(node,flags,size,op_shru);
|
| 960 |
|
|
case en_asadd: return GenerateAssignAdd(node,flags,size,op_add);
|
| 961 |
|
|
case en_assub: return GenerateAssignAdd(node,flags,size,op_sub);
|
| 962 |
|
|
case en_asand: return GenerateAssignLogic(node,flags,size,op_and);
|
| 963 |
|
|
case en_asor: return GenerateAssignLogic(node,flags,size,op_or);
|
| 964 |
|
|
case en_asxor: return GenerateAssignLogic(node,flags,size,op_xor);
|
| 965 |
|
|
case en_aslsh:
|
| 966 |
|
|
return GenerateAssignShift(node,flags,size,op_shl);
|
| 967 |
|
|
case en_asrsh:
|
| 968 |
|
|
return GenerateAssignShift(node,flags,size,op_shr);
|
| 969 |
|
|
case en_asmul: return GenerateAssignMultiply(node,flags,size,op_muls);
|
| 970 |
|
|
case en_asmulu: return GenerateAssignMultiply(node,flags,size,op_mulu);
|
| 971 |
|
|
case en_asdiv:
|
| 972 |
|
|
return gen_asmodiv(node,flags,size,op_divs);
|
| 973 |
|
|
case en_asmod:
|
| 974 |
|
|
return gen_asmodiv(node,flags,size,op_muls);
|
| 975 |
|
|
case en_assign:
|
| 976 |
|
|
return GenerateAssign(node,flags,size);
|
| 977 |
|
|
case en_ainc:
|
| 978 |
|
|
return GenerateAutoIncrement(node,flags,size,op_add);
|
| 979 |
|
|
case en_adec:
|
| 980 |
|
|
return GenerateAutoIncrement(node,flags,size,op_sub);
|
| 981 |
|
|
case en_land: case en_lor:
|
| 982 |
|
|
case en_eq: case en_ne:
|
| 983 |
|
|
case en_lt: case en_le:
|
| 984 |
|
|
case en_gt: case en_ge:
|
| 985 |
|
|
case en_ult: case en_ule:
|
| 986 |
|
|
case en_ugt: case en_uge:
|
| 987 |
|
|
case en_not:
|
| 988 |
|
|
lab0 = nextlabel++;
|
| 989 |
|
|
lab1 = nextlabel++;
|
| 990 |
|
|
GenerateFalseJump(node,lab0);
|
| 991 |
|
|
ap1 = GetTempRegister();
|
| 992 |
|
|
GenerateTriadic(op_ori,0,ap1,makereg(0),make_immed(1));
|
| 993 |
|
|
GenerateTriadic(op_bra,0,make_label(lab1),NULL,NULL);
|
| 994 |
|
|
GenerateLabel(lab0);
|
| 995 |
|
|
GenerateTriadic(op_ori,0,ap1,makereg(0),make_immed(0));
|
| 996 |
|
|
GenerateLabel(lab1);
|
| 997 |
|
|
return ap1;
|
| 998 |
|
|
case en_cond:
|
| 999 |
|
|
return gen_hook(node,flags,size);
|
| 1000 |
|
|
case en_void:
|
| 1001 |
|
|
natsize = GetNaturalSize(node->p[0]);
|
| 1002 |
|
|
ReleaseTempRegister(GenerateExpression(node->p[0],F_ALL | F_NOVALUE,natsize));
|
| 1003 |
|
|
return GenerateExpression(node->p[1],flags,size);
|
| 1004 |
|
|
case en_fcall:
|
| 1005 |
|
|
return GenerateFunctionCall(node,flags);
|
| 1006 |
|
|
default:
|
| 1007 |
|
|
printf("DIAG - uncoded node in GenerateExpression.\n");
|
| 1008 |
|
|
return 0;
|
| 1009 |
|
|
}
|
| 1010 |
|
|
}
|
| 1011 |
|
|
|
| 1012 |
|
|
/*
|
| 1013 |
|
|
* return the natural evaluation size of a node.
|
| 1014 |
|
|
*/
|
| 1015 |
|
|
int GetNaturalSize(ENODE *node)
|
| 1016 |
|
|
{
|
| 1017 |
|
|
int siz0, siz1;
|
| 1018 |
|
|
if( node == NULL )
|
| 1019 |
|
|
return 0;
|
| 1020 |
|
|
switch( node->nodetype )
|
| 1021 |
|
|
{
|
| 1022 |
|
|
case en_uwfieldref:
|
| 1023 |
|
|
case en_wfieldref:
|
| 1024 |
|
|
return 8;
|
| 1025 |
|
|
case en_bfieldref:
|
| 1026 |
|
|
case en_ubfieldref:
|
| 1027 |
|
|
return 1;
|
| 1028 |
|
|
case en_cfieldref:
|
| 1029 |
|
|
case en_ucfieldref:
|
| 1030 |
|
|
return 2;
|
| 1031 |
|
|
case en_hfieldref:
|
| 1032 |
|
|
case en_uhfieldref:
|
| 1033 |
|
|
return 4;
|
| 1034 |
|
|
case en_icon:
|
| 1035 |
|
|
if( -128 <= node->i && node->i <= 127 )
|
| 1036 |
|
|
return 1;
|
| 1037 |
|
|
if( -32768 <= node->i && node->i <= 32767 )
|
| 1038 |
|
|
return 2;
|
| 1039 |
|
|
if (-2147483648L <= node->i && node->i <= 2147483647L)
|
| 1040 |
|
|
return 4;
|
| 1041 |
|
|
return 8;
|
| 1042 |
|
|
case en_fcall: case en_labcon:
|
| 1043 |
|
|
case en_nacon: case en_autocon:
|
| 1044 |
|
|
case en_tempref:
|
| 1045 |
|
|
case en_regvar:
|
| 1046 |
|
|
case en_cbw:
|
| 1047 |
|
|
case en_ccw:
|
| 1048 |
|
|
case en_chw:
|
| 1049 |
|
|
return 8;
|
| 1050 |
|
|
case en_b_ref:
|
| 1051 |
|
|
case en_ub_ref:
|
| 1052 |
|
|
return 1;
|
| 1053 |
|
|
case en_cbc:
|
| 1054 |
|
|
case en_c_ref: return 2;
|
| 1055 |
|
|
case en_uc_ref: return 2;
|
| 1056 |
|
|
case en_cbh: return 4;
|
| 1057 |
|
|
case en_cch: return 4;
|
| 1058 |
|
|
case en_h_ref: return 4;
|
| 1059 |
|
|
case en_uh_ref: return 4;
|
| 1060 |
|
|
case en_w_ref: case en_uw_ref:
|
| 1061 |
|
|
return 8;
|
| 1062 |
|
|
case en_not: case en_compl:
|
| 1063 |
|
|
case en_uminus: case en_assign:
|
| 1064 |
|
|
case en_ainc: case en_adec:
|
| 1065 |
|
|
return GetNaturalSize(node->p[0]);
|
| 1066 |
|
|
case en_add: case en_sub:
|
| 1067 |
|
|
case en_mul: case en_div:
|
| 1068 |
|
|
case en_mod: case en_and:
|
| 1069 |
|
|
case en_or: case en_xor:
|
| 1070 |
|
|
case en_shl: case en_shr: case en_shru:
|
| 1071 |
|
|
case en_eq: case en_ne:
|
| 1072 |
|
|
case en_lt: case en_le:
|
| 1073 |
|
|
case en_gt: case en_ge:
|
| 1074 |
|
|
case en_ult: case en_ule:
|
| 1075 |
|
|
case en_ugt: case en_uge:
|
| 1076 |
|
|
case en_land: case en_lor:
|
| 1077 |
|
|
case en_asadd: case en_assub:
|
| 1078 |
|
|
case en_asmul: case en_asdiv:
|
| 1079 |
|
|
case en_asmod: case en_asand:
|
| 1080 |
|
|
case en_asor: case en_asxor: case en_aslsh:
|
| 1081 |
|
|
case en_asrsh:
|
| 1082 |
|
|
siz0 = GetNaturalSize(node->p[0]);
|
| 1083 |
|
|
siz1 = GetNaturalSize(node->p[1]);
|
| 1084 |
|
|
if( siz1 > siz0 )
|
| 1085 |
|
|
return siz1;
|
| 1086 |
|
|
else
|
| 1087 |
|
|
return siz0;
|
| 1088 |
|
|
case en_void: case en_cond:
|
| 1089 |
|
|
return GetNaturalSize(node->p[1]);
|
| 1090 |
|
|
default:
|
| 1091 |
|
|
printf("DIAG - natural size error %d.\n", node->nodetype);
|
| 1092 |
|
|
break;
|
| 1093 |
|
|
}
|
| 1094 |
|
|
return 0;
|
| 1095 |
|
|
}
|
| 1096 |
|
|
|
| 1097 |
|
|
|
| 1098 |
|
|
void gen_b(ENODE *node, int op, int label)
|
| 1099 |
|
|
{
|
| 1100 |
|
|
int size;
|
| 1101 |
|
|
struct amode *ap1, *ap2;
|
| 1102 |
|
|
|
| 1103 |
|
|
size = GetNaturalSize(node);
|
| 1104 |
|
|
ap1 = GenerateExpression(node->p[0],F_REG, size);
|
| 1105 |
|
|
ap2 = GenerateExpression(node->p[1],F_REG|F_IMMED18,size);
|
| 1106 |
|
|
GenerateTriadic(op,0,ap1,ap2,make_label(label));
|
| 1107 |
|
|
ReleaseTempRegister(ap2);
|
| 1108 |
|
|
ReleaseTempRegister(ap1);
|
| 1109 |
|
|
}
|
| 1110 |
|
|
/*
|
| 1111 |
|
|
* generate a jump to label if the node passed evaluates to
|
| 1112 |
|
|
* a true condition.
|
| 1113 |
|
|
*/
|
| 1114 |
|
|
void GenerateTrueJump(ENODE *node, int label)
|
| 1115 |
|
|
{ AMODE *ap1,*ap2;
|
| 1116 |
|
|
int siz1;
|
| 1117 |
|
|
int lab0;
|
| 1118 |
|
|
int size;
|
| 1119 |
|
|
if( node == 0 )
|
| 1120 |
|
|
return;
|
| 1121 |
|
|
switch( node->nodetype )
|
| 1122 |
|
|
{
|
| 1123 |
|
|
case en_eq: gen_b(node, op_beq, label); break;
|
| 1124 |
|
|
case en_ne: gen_b(node, op_bne, label); break;
|
| 1125 |
|
|
case en_lt: gen_b(node, op_blt, label); break;
|
| 1126 |
|
|
case en_le: gen_b(node, op_ble, label); break;
|
| 1127 |
|
|
case en_gt: gen_b(node, op_bgt, label); break;
|
| 1128 |
|
|
case en_ge: gen_b(node, op_bge, label); break;
|
| 1129 |
|
|
case en_ult: gen_b(node, op_bltu, label); break;
|
| 1130 |
|
|
case en_ule: gen_b(node, op_bleu, label); break;
|
| 1131 |
|
|
case en_ugt: gen_b(node, op_bgtu, label); break;
|
| 1132 |
|
|
case en_uge: gen_b(node, op_bgeu, label); break;
|
| 1133 |
|
|
case en_land:
|
| 1134 |
|
|
lab0 = nextlabel++;
|
| 1135 |
|
|
GenerateFalseJump(node->p[0],lab0);
|
| 1136 |
|
|
GenerateTrueJump(node->p[1],label);
|
| 1137 |
|
|
GenerateLabel(lab0);
|
| 1138 |
|
|
break;
|
| 1139 |
|
|
case en_lor:
|
| 1140 |
|
|
GenerateTrueJump(node->p[0],label);
|
| 1141 |
|
|
GenerateTrueJump(node->p[1],label);
|
| 1142 |
|
|
break;
|
| 1143 |
|
|
case en_not:
|
| 1144 |
|
|
GenerateFalseJump(node->p[0],label);
|
| 1145 |
|
|
break;
|
| 1146 |
|
|
default:
|
| 1147 |
|
|
siz1 = GetNaturalSize(node);
|
| 1148 |
|
|
ap1 = GenerateExpression(node,F_REG,siz1);
|
| 1149 |
|
|
// GenerateDiadic(op_tst,siz1,ap1,0);
|
| 1150 |
|
|
ReleaseTempRegister(ap1);
|
| 1151 |
|
|
GenerateTriadic(op_bne,0,ap1,makereg(0),make_label(label));
|
| 1152 |
|
|
break;
|
| 1153 |
|
|
}
|
| 1154 |
|
|
}
|
| 1155 |
|
|
|
| 1156 |
|
|
/*
|
| 1157 |
|
|
* generate code to execute a jump to label if the expression
|
| 1158 |
|
|
* passed is false.
|
| 1159 |
|
|
*/
|
| 1160 |
|
|
void GenerateFalseJump(ENODE *node,int label)
|
| 1161 |
|
|
{
|
| 1162 |
|
|
AMODE *ap,*ap1,*ap2;
|
| 1163 |
|
|
int size;
|
| 1164 |
|
|
int siz1;
|
| 1165 |
|
|
int lab0;
|
| 1166 |
|
|
if( node == NULL )
|
| 1167 |
|
|
return;
|
| 1168 |
|
|
switch( node->nodetype )
|
| 1169 |
|
|
{
|
| 1170 |
|
|
case en_eq: gen_b(node, op_bne, label); break;
|
| 1171 |
|
|
case en_ne: gen_b(node, op_beq, label); break;
|
| 1172 |
|
|
case en_lt: gen_b(node, op_bge, label); break;
|
| 1173 |
|
|
case en_le: gen_b(node, op_bgt, label); break;
|
| 1174 |
|
|
case en_gt: gen_b(node, op_ble, label); break;
|
| 1175 |
|
|
case en_ge: gen_b(node, op_blt, label); break;
|
| 1176 |
|
|
case en_ult: gen_b(node, op_bgeu, label); break;
|
| 1177 |
|
|
case en_ule: gen_b(node, op_bgtu, label); break;
|
| 1178 |
|
|
case en_ugt: gen_b(node, op_bleu, label); break;
|
| 1179 |
|
|
case en_uge: gen_b(node, op_bltu, label); break;
|
| 1180 |
|
|
case en_land:
|
| 1181 |
|
|
GenerateFalseJump(node->p[0],label);
|
| 1182 |
|
|
GenerateFalseJump(node->p[1],label);
|
| 1183 |
|
|
break;
|
| 1184 |
|
|
case en_lor:
|
| 1185 |
|
|
lab0 = nextlabel++;
|
| 1186 |
|
|
GenerateTrueJump(node->p[0],lab0);
|
| 1187 |
|
|
GenerateFalseJump(node->p[1],label);
|
| 1188 |
|
|
GenerateLabel(lab0);
|
| 1189 |
|
|
break;
|
| 1190 |
|
|
case en_not:
|
| 1191 |
|
|
GenerateTrueJump(node->p[0],label);
|
| 1192 |
|
|
break;
|
| 1193 |
|
|
default:
|
| 1194 |
|
|
siz1 = GetNaturalSize(node);
|
| 1195 |
|
|
ap = GenerateExpression(node,F_REG,siz1);
|
| 1196 |
|
|
// GenerateDiadic(op_tst,siz1,ap,0);
|
| 1197 |
|
|
ReleaseTempRegister(ap);
|
| 1198 |
|
|
GenerateTriadic(op_beq,0,ap,makereg(0),make_label(label));
|
| 1199 |
|
|
break;
|
| 1200 |
|
|
}
|
| 1201 |
|
|
}
|
