162 lines
2.9 KiB
C
162 lines
2.9 KiB
C
#define RCSID4 "$Header$"
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/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*
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*/
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operation
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: prefix oper
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;
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prefix : /* empty */
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| prefix PREFIX
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{ emit1($2);}
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;
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oper : NOOP_1
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{ emit1($1);}
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| NOOP_2
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{ emit2($1);}
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| JOP expr
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{ branch($1,$2);}
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| PUSHOP ea_1
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{ pushop($1);}
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| IOOP expr
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{ emit1($1);
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#ifdef RELOCATION
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newrelo($2.typ, RELO1);
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#endif
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emit1($2.val);
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}
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| IOOP R16
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{ if ($2!=2) serror("register error");
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emit1($1+010);
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}
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| ADDOP ea_ea
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{ addop($1);}
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| ROLOP ea_ea
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{ rolop($1);}
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| INCOP ea_1
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{ incop($1);}
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| IMUL ea_ea
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{ imul($1);}
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| IMUL ea_1
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{ regsize($1); emit1(0366|($1&1)); ea_1($1&070);}
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| NOTOP ea_1
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{ regsize($1); emit1(0366|($1&1)); ea_1($1&070);}
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| CALLOP ea_1
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{ callop($1&0xFFFF);}
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| CALFOP expr ':' expr
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{ emit1($1>>8);
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#ifdef RELOCATION
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newrelo($4.typ, RELO2);
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#endif
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emit2($4.val);
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#ifdef RELOCATION
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newrelo($2.typ, RELO2);
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#endif
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emit2($2.val);
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}
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| CALFOP mem
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{ emit1(0377); ea_2($1&0xFF);}
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| ENTER absexp ',' absexp
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{ fit(fitw($2)); fit(fitb($4));
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emit1($1); emit2((int)$2); emit1((int)$4);
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}
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| LEAOP R16 ',' mem
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{ emit1($1); ea_2($2<<3);}
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| EXTOP R16 ',' ea_2
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{ emit1(0xF); emit1($1);
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ea_2($2<<3);
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}
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| EXTOP1 ea_1
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{ regsize(1); emit1(0xF); emit1($1&07);
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ea_1($1&070);
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}
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| ESC absexp ',' mem
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{ fit(fit6($2));
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emit1(0330 | $2>>3);
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ea_2(($2&7)<<3);
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}
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| INT absexp
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{ if ($2==3)
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emit1(0314);
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else {
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emit1(0315); emit1($2);
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}
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}
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| RET
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{ emit1($1);}
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| RET expr
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{ emit1($1-1);
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#ifdef RELOCATION
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newrelo($2.typ, RELO2);
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#endif
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emit2($2.val);
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}
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| XCHG ea_ea
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{ xchg($1);}
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| TEST ea_ea
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{ test($1);}
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| MOV ea_ea
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{ mov($1);}
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/* Intel 8087 coprocessor instructions */
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| FNOOP
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{ emit1($1); emit1($1>>8);}
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| FMEM mem
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{ emit1($1); ea_2(($1>>8)&070);}
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| FST_I st_i
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{ emit1($1); emit1(($1>>8)|$2); }
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| FST_I ST
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{ emit1($1); emit1($1>>8); }
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| FST_ST ST ',' st_i
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{ emit1($1); emit1(($1>>8)|$4); }
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| FST_ST st_i ',' ST
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{ emit1($1|4); emit1((($1>>8)|$2)); }
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| FST_ST2 st_i ',' ST
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{ emit1($1|4); emit1((($1>>8)|$2)^010); }
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;
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st_i : ST '(' absexp ')'
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{ if (!fit3($3)) {
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serror("illegal index in FP stack");
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}
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$$ = $3;
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}
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;
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mem : '(' expr ')'
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{ mrg_2 = 6; exp_2 = $2;
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RELOMOVE(rel_2, relonami);
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}
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| bases
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{ exp_2.val = 0; exp_2.typ = S_ABS; indexed();}
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| expr bases
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{ exp_2 = $1; indexed();
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RELOMOVE(rel_2, relonami);
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}
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;
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bases : '(' R16 ')'
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{ mrg_2 = sr_m[$2];}
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| '(' R16 ')' '(' R16 ')'
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{ mrg_2 = dr_m[$2][$5];}
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;
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ea_2 : mem
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| R8
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{ mrg_2 = $1 | 0300;}
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| R16
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{ mrg_2 = $1 | 0310;}
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| RSEG
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{ mrg_2 = $1 | 020;}
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| expr
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{ mrg_2 = 040; exp_2 = $1;
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RELOMOVE(rel_2, relonami);
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}
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;
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ea_1 : ea_2
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{ mrg_1 = mrg_2; exp_1 = exp_2;
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RELOMOVE(rel_1, rel_2);
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}
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;
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ea_ea : ea_1 ',' ea_2
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;
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