ref: 2c9e3861a54e22498fb2e3226defe4393b20b202
dir: /sys/src/cmd/qa/a.y/
%{
#include "a.h"
%}
%union
{
Sym *sym;
long lval;
double dval;
char sval[8];
Gen gen;
}
%left '|'
%left '^'
%left '&'
%left '<' '>'
%left '+' '-'
%left '*' '/' '%'
%token <lval> LMOVW LMOVB LABS LLOGW LSHW LADDW LCMP LCROP
%token <lval> LBRA LFMOV LFCONV LFCMP LFADD LFMA LTRAP LXORW
%token <lval> LNOP LEND LRETT LWORD LTEXT LDATA LRETRN
%token <lval> LCONST LSP LSB LFP LPC LCREG LFLUSH
%token <lval> LREG LFREG LR LCR LF LFPSCR
%token <lval> LLR LCTR LSPR LSPREG LSEG LMSR LDCR
%token <lval> LSCHED LXLD LXST LXOP LXMV
%token <lval> LRLWM LMOVMW LMOVEM LMOVFL LMTFSB LMA LFMOVX
%token <dval> LFCONST
%token <sval> LSCONST
%token <sym> LNAME LLAB LVAR
%type <lval> con expr pointer offset sreg
%type <gen> addr rreg regaddr name creg freg xlreg lr ctr
%type <gen> imm ximm fimm rel psr lcr cbit fpscr fpscrf seg msr mask
%%
prog:
| prog line
line:
LLAB ':'
{
if($1->value != pc)
yyerror("redeclaration of %s", $1->name);
$1->value = pc;
}
line
| LNAME ':'
{
$1->type = LLAB;
$1->value = pc;
}
line
| LNAME '=' expr ';'
{
$1->type = LVAR;
$1->value = $3;
}
| LVAR '=' expr ';'
{
if($1->value != $3)
yyerror("redeclaration of %s", $1->name);
$1->value = $3;
}
| LSCHED ';'
{
nosched = $1;
}
| ';'
| inst ';'
| error ';'
inst:
/*
* load ints and bytes
*/
LMOVW rreg ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LMOVW addr ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LMOVW regaddr ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LMOVB rreg ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LMOVB addr ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LMOVB regaddr ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
/*
* load and store floats
*/
| LFMOV addr ',' freg
{
outcode($1, &$2, NREG, &$4);
}
| LFMOV regaddr ',' freg
{
outcode($1, &$2, NREG, &$4);
}
| LFMOV fimm ',' freg
{
outcode($1, &$2, NREG, &$4);
}
| LFMOV freg ',' freg
{
outcode($1, &$2, NREG, &$4);
}
| LFMOV freg ',' addr
{
outcode($1, &$2, NREG, &$4);
}
| LFMOV freg ',' regaddr
{
outcode($1, &$2, NREG, &$4);
}
/*
* load and store floats, indexed only
*/
| LFMOVX regaddr ',' freg
{
outcode($1, &$2, NREG, &$4);
}
| LFMOVX freg ',' regaddr
{
outcode($1, &$2, NREG, &$4);
}
/*
* store ints and bytes
*/
| LMOVW rreg ',' addr
{
outcode($1, &$2, NREG, &$4);
}
| LMOVW rreg ',' regaddr
{
outcode($1, &$2, NREG, &$4);
}
| LMOVB rreg ',' addr
{
outcode($1, &$2, NREG, &$4);
}
| LMOVB rreg ',' regaddr
{
outcode($1, &$2, NREG, &$4);
}
/*
* store floats
*/
| LMOVW freg ',' addr
{
outcode($1, &$2, NREG, &$4);
}
| LMOVW freg ',' regaddr
{
outcode($1, &$2, NREG, &$4);
}
/*
* floating point status
*/
| LMOVW fpscr ',' freg
{
outcode($1, &$2, NREG, &$4);
}
| LMOVW freg ',' fpscr
{
outcode($1, &$2, NREG, &$4);
}
| LMOVW freg ',' imm ',' fpscr
{
outgcode($1, &$2, NREG, &$4, &$6);
}
| LMOVW fpscr ',' creg
{
outcode($1, &$2, NREG, &$4);
}
| LMOVW imm ',' fpscrf
{
outcode($1, &$2, NREG, &$4);
}
| LMTFSB imm ',' con
{
outcode($1, &$2, $4, &nullgen);
}
/*
* field moves (mtcrf)
*/
| LMOVW rreg ',' imm ',' lcr
{
outgcode($1, &$2, NREG, &$4, &$6);
}
| LMOVW rreg ',' creg
{
outcode($1, &$2, NREG, &$4);
}
| LMOVW rreg ',' lcr
{
outcode($1, &$2, NREG, &$4);
}
/*
* integer operations
* logical instructions
* shift instructions
* unary instructions
*/
| LADDW rreg ',' sreg ',' rreg
{
outcode($1, &$2, $4, &$6);
}
| LADDW imm ',' sreg ',' rreg
{
outcode($1, &$2, $4, &$6);
}
| LADDW rreg ',' imm ',' rreg
{
outgcode($1, &$2, NREG, &$4, &$6);
}
| LADDW rreg ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LADDW imm ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LLOGW rreg ',' sreg ',' rreg
{
outcode($1, &$2, $4, &$6);
}
| LLOGW rreg ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LSHW rreg ',' sreg ',' rreg
{
outcode($1, &$2, $4, &$6);
}
| LSHW rreg ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LSHW imm ',' sreg ',' rreg
{
outcode($1, &$2, $4, &$6);
}
| LSHW imm ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LABS rreg ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LABS rreg
{
outcode($1, &$2, NREG, &$2);
}
/*
* multiply-accumulate
*/
| LMA rreg ',' sreg ',' rreg
{
outcode($1, &$2, $4, &$6);
}
/*
* move immediate: macro for cau+or, addi, addis, and other combinations
*/
| LMOVW imm ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LMOVW ximm ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
/*
* condition register operations
*/
| LCROP cbit ',' cbit
{
outcode($1, &$2, $4.reg, &$4);
}
| LCROP cbit ',' con ',' cbit
{
outcode($1, &$2, $4, &$6);
}
/*
* condition register moves
* move from machine state register
*/
| LMOVW creg ',' creg
{
outcode($1, &$2, NREG, &$4);
}
| LMOVW psr ',' creg
{
outcode($1, &$2, NREG, &$4);
}
| LMOVW lcr ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LMOVW psr ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LMOVW seg ',' rreg
{
int r;
r = $2.offset;
$2.offset = 0;
outcode($1, &$2, r, &$4);
}
| LMOVW rreg ',' seg
{
int r;
r = $4.offset;
$4.offset = 0;
outcode($1, &$2, r, &$4);
}
| LMOVW xlreg ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LMOVW rreg ',' xlreg
{
outcode($1, &$2, NREG, &$4);
}
| LMOVW creg ',' psr
{
outcode($1, &$2, NREG, &$4);
}
| LMOVW rreg ',' psr
{
outcode($1, &$2, NREG, &$4);
}
/*
* branch, branch conditional
* branch conditional register
* branch conditional to count register
*/
| LBRA rel
{
outcode($1, &nullgen, NREG, &$2);
}
| LBRA addr
{
outcode($1, &nullgen, NREG, &$2);
}
| LBRA '(' xlreg ')'
{
outcode($1, &nullgen, NREG, &$3);
}
| LBRA ',' rel
{
outcode($1, &nullgen, NREG, &$3);
}
| LBRA ',' addr
{
outcode($1, &nullgen, NREG, &$3);
}
| LBRA ',' '(' xlreg ')'
{
outcode($1, &nullgen, NREG, &$4);
}
| LBRA creg ',' rel
{
outcode($1, &$2, NREG, &$4);
}
| LBRA creg ',' addr
{
outcode($1, &$2, NREG, &$4);
}
| LBRA creg ',' '(' xlreg ')'
{
outcode($1, &$2, NREG, &$5);
}
| LBRA con ',' rel
{
outcode($1, &nullgen, $2, &$4);
}
| LBRA con ',' addr
{
outcode($1, &nullgen, $2, &$4);
}
| LBRA con ',' '(' xlreg ')'
{
outcode($1, &nullgen, $2, &$5);
}
| LBRA con ',' con ',' rel
{
Gen g;
g = nullgen;
g.type = D_CONST;
g.offset = $2;
outcode($1, &g, $4, &$6);
}
| LBRA con ',' con ',' addr
{
Gen g;
g = nullgen;
g.type = D_CONST;
g.offset = $2;
outcode($1, &g, $4, &$6);
}
| LBRA con ',' con ',' '(' xlreg ')'
{
Gen g;
g = nullgen;
g.type = D_CONST;
g.offset = $2;
outcode($1, &g, $4, &$7);
}
/*
* conditional trap
*/
| LTRAP rreg ',' sreg
{
outcode($1, &$2, $4, &nullgen);
}
| LTRAP imm ',' sreg
{
outcode($1, &$2, $4, &nullgen);
}
| LTRAP rreg comma
{
outcode($1, &$2, NREG, &nullgen);
}
| LTRAP comma
{
outcode($1, &nullgen, NREG, &nullgen);
}
/*
* floating point operate
*/
| LFCONV freg ',' freg
{
outcode($1, &$2, NREG, &$4);
}
| LFADD freg ',' freg
{
outcode($1, &$2, NREG, &$4);
}
| LFADD freg ',' freg ',' freg
{
outcode($1, &$2, $4.reg, &$6);
}
| LFMA freg ',' freg ',' freg ',' freg
{
outgcode($1, &$2, $4.reg, &$6, &$8);
}
| LFCMP freg ',' freg
{
outcode($1, &$2, NREG, &$4);
}
| LFCMP freg ',' freg ',' creg
{
outcode($1, &$2, $6.reg, &$4);
}
/*
* CMP
*/
| LCMP rreg ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LCMP rreg ',' imm
{
outcode($1, &$2, NREG, &$4);
}
| LCMP rreg ',' rreg ',' creg
{
outcode($1, &$2, $6.reg, &$4);
}
| LCMP rreg ',' imm ',' creg
{
outcode($1, &$2, $6.reg, &$4);
}
/*
* rotate and mask
*/
| LRLWM imm ',' rreg ',' imm ',' rreg
{
outgcode($1, &$2, $4.reg, &$6, &$8);
}
| LRLWM imm ',' rreg ',' mask ',' rreg
{
outgcode($1, &$2, $4.reg, &$6, &$8);
}
| LRLWM rreg ',' rreg ',' imm ',' rreg
{
outgcode($1, &$2, $4.reg, &$6, &$8);
}
| LRLWM rreg ',' rreg ',' mask ',' rreg
{
outgcode($1, &$2, $4.reg, &$6, &$8);
}
/*
* load/store multiple
*/
| LMOVMW addr ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LMOVMW rreg ',' addr
{
outcode($1, &$2, NREG, &$4);
}
/*
* various indexed load/store
* indexed unary (eg, cache clear)
*/
| LXLD regaddr ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LXLD regaddr ',' imm ',' rreg
{
outgcode($1, &$2, NREG, &$4, &$6);
}
| LXST rreg ',' regaddr
{
outcode($1, &$2, NREG, &$4);
}
| LXST rreg ',' imm ',' regaddr
{
outgcode($1, &$2, NREG, &$4, &$6);
}
| LXMV regaddr ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LXMV rreg ',' regaddr
{
outcode($1, &$2, NREG, &$4);
}
| LXOP regaddr
{
outcode($1, &$2, NREG, &nullgen);
}
/*
* NOP
*/
| LNOP comma
{
outcode($1, &nullgen, NREG, &nullgen);
}
| LNOP rreg comma
{
outcode($1, &$2, NREG, &nullgen);
}
| LNOP freg comma
{
outcode($1, &$2, NREG, &nullgen);
}
| LNOP ',' rreg
{
outcode($1, &nullgen, NREG, &$3);
}
| LNOP ',' freg
{
outcode($1, &nullgen, NREG, &$3);
}
/*
* word
*/
| LWORD imm comma
{
outcode($1, &$2, NREG, &nullgen);
}
| LWORD ximm comma
{
outcode($1, &$2, NREG, &nullgen);
}
/*
* END
*/
| LEND comma
{
outcode($1, &nullgen, NREG, &nullgen);
}
/*
* TEXT/GLOBL
*/
| LTEXT name ',' imm
{
outcode($1, &$2, NREG, &$4);
}
| LTEXT name ',' con ',' imm
{
outcode($1, &$2, $4, &$6);
}
| LTEXT name ',' imm ':' imm
{
outgcode($1, &$2, NREG, &$6, &$4);
}
| LTEXT name ',' con ',' imm ':' imm
{
outgcode($1, &$2, $4, &$8, &$6);
}
/*
* DATA
*/
| LDATA name '/' con ',' imm
{
outcode($1, &$2, $4, &$6);
}
| LDATA name '/' con ',' ximm
{
outcode($1, &$2, $4, &$6);
}
| LDATA name '/' con ',' fimm
{
outcode($1, &$2, $4, &$6);
}
/*
* RETURN
*/
| LRETRN comma
{
outcode($1, &nullgen, NREG, &nullgen);
}
rel:
con '(' LPC ')'
{
$$ = nullgen;
$$.type = D_BRANCH;
$$.offset = $1 + pc;
}
| LNAME offset
{
$$ = nullgen;
if(pass == 2)
yyerror("undefined label: %s", $1->name);
$$.type = D_BRANCH;
$$.sym = $1;
$$.offset = $2;
}
| LLAB offset
{
$$ = nullgen;
$$.type = D_BRANCH;
$$.sym = $1;
$$.offset = $1->value + $2;
}
rreg:
sreg
{
$$ = nullgen;
$$.type = D_REG;
$$.reg = $1;
}
xlreg:
lr
| ctr
lr:
LLR
{
$$ = nullgen;
$$.type = D_SPR;
$$.offset = $1;
}
lcr:
LCR
{
$$ = nullgen;
$$.type = D_CREG;
$$.reg = NREG; /* whole register */
}
ctr:
LCTR
{
$$ = nullgen;
$$.type = D_SPR;
$$.offset = $1;
}
msr:
LMSR
{
$$ = nullgen;
$$.type = D_MSR;
}
psr:
LSPREG
{
$$ = nullgen;
$$.type = D_SPR;
$$.offset = $1;
}
| LSPR '(' con ')'
{
$$ = nullgen;
$$.type = $1;
$$.offset = $3;
}
| LDCR '(' con ')'
{
$$ = nullgen;
$$.type = $1;
$$.offset = $3;
}
| LDCR '(' sreg ')'
{
$$ = nullgen;
$$.type = $1;
$$.reg = $3;
$$.offset = 0;
}
| msr
seg:
LSEG '(' con ')'
{
if($3 < 0 || $3 > 15)
yyerror("segment register number out of range");
$$ = nullgen;
$$.type = D_SREG;
$$.reg = $3;
$$.offset = NREG;
}
| LSEG '(' sreg ')'
{
$$ = nullgen;
$$.type = D_SREG;
$$.reg = NREG;
$$.offset = $3;
}
fpscr:
LFPSCR
{
$$ = nullgen;
$$.type = D_FPSCR;
$$.reg = NREG;
}
fpscrf:
LFPSCR '(' con ')'
{
$$ = nullgen;
$$.type = D_FPSCR;
$$.reg = $3;
}
freg:
LFREG
{
$$ = nullgen;
$$.type = D_FREG;
$$.reg = $1;
}
| LF '(' con ')'
{
$$ = nullgen;
$$.type = D_FREG;
$$.reg = $3;
}
creg:
LCREG
{
$$ = nullgen;
$$.type = D_CREG;
$$.reg = $1;
}
| LCR '(' con ')'
{
$$ = nullgen;
$$.type = D_CREG;
$$.reg = $3;
}
cbit: con
{
$$ = nullgen;
$$.type = D_REG;
$$.reg = $1;
}
mask:
con ',' con
{
int mb, me;
ulong v;
$$ = nullgen;
$$.type = D_CONST;
mb = $1;
me = $3;
if(mb < 0 || mb > 31 || me < 0 || me > 31){
yyerror("illegal mask start/end value(s)");
mb = me = 0;
}
if(mb <= me)
v = ((ulong)~0L>>mb) & (~0L<<(31-me));
else
v = ~(((ulong)~0L>>(me+1)) & (~0L<<(31-(mb-1))));
$$.offset = v;
}
ximm:
'$' addr
{
$$ = $2;
$$.type = D_CONST;
}
| '$' LSCONST
{
$$ = nullgen;
$$.type = D_SCONST;
memcpy($$.sval, $2, sizeof($$.sval));
}
fimm:
'$' LFCONST
{
$$ = nullgen;
$$.type = D_FCONST;
$$.dval = $2;
}
| '$' '-' LFCONST
{
$$ = nullgen;
$$.type = D_FCONST;
$$.dval = -$3;
}
imm: '$' con
{
$$ = nullgen;
$$.type = D_CONST;
$$.offset = $2;
}
sreg:
LREG
| LR '(' con ')'
{
if($$ < 0 || $$ >= NREG)
print("register value out of range\n");
$$ = $3;
}
regaddr:
'(' sreg ')'
{
$$ = nullgen;
$$.type = D_OREG;
$$.reg = $2;
$$.offset = 0;
}
| '(' sreg '+' sreg ')'
{
$$ = nullgen;
$$.type = D_OREG;
$$.reg = $2;
$$.xreg = $4;
$$.offset = 0;
}
addr:
name
| con '(' sreg ')'
{
$$ = nullgen;
$$.type = D_OREG;
$$.reg = $3;
$$.offset = $1;
}
name:
con '(' pointer ')'
{
$$ = nullgen;
$$.type = D_OREG;
$$.name = $3;
$$.sym = S;
$$.offset = $1;
}
| LNAME offset '(' pointer ')'
{
$$ = nullgen;
$$.type = D_OREG;
$$.name = $4;
$$.sym = $1;
$$.offset = $2;
}
| LNAME '<' '>' offset '(' LSB ')'
{
$$ = nullgen;
$$.type = D_OREG;
$$.name = D_STATIC;
$$.sym = $1;
$$.offset = $4;
}
comma:
| ','
offset:
{
$$ = 0;
}
| '+' con
{
$$ = $2;
}
| '-' con
{
$$ = -$2;
}
pointer:
LSB
| LSP
| LFP
con:
LCONST
| LVAR
{
$$ = $1->value;
}
| '-' con
{
$$ = -$2;
}
| '+' con
{
$$ = $2;
}
| '~' con
{
$$ = ~$2;
}
| '(' expr ')'
{
$$ = $2;
}
expr:
con
| expr '+' expr
{
$$ = $1 + $3;
}
| expr '-' expr
{
$$ = $1 - $3;
}
| expr '*' expr
{
$$ = $1 * $3;
}
| expr '/' expr
{
$$ = $1 / $3;
}
| expr '%' expr
{
$$ = $1 % $3;
}
| expr '<' '<' expr
{
$$ = $1 << $4;
}
| expr '>' '>' expr
{
$$ = $1 >> $4;
}
| expr '&' expr
{
$$ = $1 & $3;
}
| expr '^' expr
{
$$ = $1 ^ $3;
}
| expr '|' expr
{
$$ = $1 | $3;
}