ref: 6ca8e6bbafcc871301a90aa7bd4ca10533b1999a
dir: /sys/src/cmd/ka/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 LMOVD LMOVB LSWAP LADDW LCMP
%token <lval> LBRA LFMOV LFCONV LFADD LCPOP LTRAP LJMPL LXORW
%token <lval> LNOP LEND LRETT LUNIMP LTEXT LDATA LRETRN
%token <lval> LCONST LSP LSB LFP LPC LCREG LFLUSH
%token <lval> LREG LFREG LR LC LF
%token <lval> LFSR LFPQ LPSR LSCHED
%token <dval> LFCONST
%token <sval> LSCONST
%token <sym> LNAME LLAB LVAR
%type <lval> con expr pointer offset sreg
%type <gen> addr rreg name psr creg freg
%type <gen> imm ximm fimm rel fsr fpq
%%
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:
/*
* B.1 load integer instructions
*/
LMOVW rreg ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LMOVW addr ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LMOVD addr ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LMOVB rreg ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LMOVB addr ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
/*
* B.2 load floating instructions
* includes CSR
*/
| LMOVD addr ',' freg
{
outcode($1, &$2, NREG, &$4);
}
| LFMOV addr ',' 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);
}
| LMOVW addr ',' fsr
{
outcode($1, &$2, NREG, &$4);
}
/*
* B.3 load coprocessor instructions
* excludes CSR
*/
| LMOVW addr ',' creg
{
outcode($1, &$2, NREG, &$4);
}
| LMOVD addr ',' creg
{
outcode($1, &$2, NREG, &$4);
}
/*
* B.4 store integer instructions
*/
| LMOVW rreg ',' addr
{
outcode($1, &$2, NREG, &$4);
}
| LMOVW imm ',' addr
{
if($2.offset != 0)
yyerror("constant must be zero");
outcode($1, &$2, NREG, &$4);
}
| LMOVD rreg ',' addr
{
outcode($1, &$2, NREG, &$4);
}
| LMOVB rreg ',' addr
{
outcode($1, &$2, NREG, &$4);
}
| LMOVB imm ',' addr
{
if($2.offset != 0)
yyerror("constant must be zero");
outcode($1, &$2, NREG, &$4);
}
/*
* B.5 store floating instructions
* includes CSR and CQ
*/
| LMOVW freg ',' addr
{
outcode($1, &$2, NREG, &$4);
}
| LMOVD freg ',' addr
{
outcode($1, &$2, NREG, &$4);
}
| LMOVW fsr ',' addr
{
outcode($1, &$2, NREG, &$4);
}
| LMOVD fpq ',' addr
{
outcode($1, &$2, NREG, &$4);
}
/*
* B.6 store coprocessor instructions
* excludes CSR and CQ
*/
| LMOVW creg ',' addr
{
outcode($1, &$2, NREG, &$4);
}
| LMOVD creg ',' addr
{
outcode($1, &$2, NREG, &$4);
}
/*
* B.7 atomic load unsigned byte (TAS)
* B.8 swap
*/
| LSWAP addr ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
/*
* B.9 add instructions
* B.10 tagged add instructions
* B.11 subtract instructions
* B.12 tagged subtract instructions
* B.13 multiply step instruction
* B.14 logical instructions
* B.15 shift instructions
* B.17 save/restore
*/
| LADDW rreg ',' sreg ',' rreg
{
outcode($1, &$2, $4, &$6);
}
| LADDW imm ',' sreg ',' rreg
{
outcode($1, &$2, $4, &$6);
}
| LADDW rreg ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LADDW imm ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LXORW rreg ',' sreg ',' rreg
{
outcode($1, &$2, $4, &$6);
}
| LXORW imm ',' sreg ',' rreg
{
outcode($1, &$2, $4, &$6);
}
| LXORW rreg ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LXORW imm ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
/*
* B.16 set hi
* other pseudo moves
*/
| LMOVW imm ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LMOVD imm ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LMOVW ximm ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LMOVD ximm ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
/*
* B.18 branch on integer condition
* B.19 floating point branch on condition
* B.20 coprocessor branch on condition
*/
| LBRA comma rel
{
outcode($1, &nullgen, NREG, &$3);
}
/*
* B.21 call instruction
* B.22 jump and link instruction
*/
| LJMPL comma rel
{
outcode($1, &nullgen, NREG, &$3);
}
| LJMPL comma addr
{
outcode($1, &nullgen, NREG, &$3);
}
| LJMPL comma sreg ',' rel
{
outcode($1, &nullgen, $3, &$5);
}
| LJMPL comma sreg ',' addr
{
outcode($1, &nullgen, $3, &$5);
}
/*
* B.23 return from trap
*/
| LRETT rreg ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
/*
* B.28 instruction cache flush
*/
| LFLUSH rel comma
{
outcode($1, &$2, NREG, &nullgen);
}
| LFLUSH addr comma
{
outcode($1, &$2, NREG, &nullgen);
}
/*
* B.24 trap on condition
*/
| 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);
}
/*
* B.25 read state register instructions
*/
| LMOVW psr ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
/*
* B.26 write state register instructions BOTCH XOR
*/
| LMOVW rreg ',' psr
{
outcode($1, &$2, NREG, &$4);
}
| LMOVW imm ',' psr
{
outcode($1, &$2, NREG, &$4);
}
| LXORW rreg ',' sreg ',' psr
{
outcode($1, &$2, $4, &$6);
}
| LXORW imm ',' sreg ',' psr
{
outcode($1, &$2, $4, &$6);
}
/*
* B.27 unimplemented trap
*/
| LUNIMP comma
{
outcode($1, &nullgen, NREG, &nullgen);
}
| LUNIMP imm comma
{
outcode($1, &$2, NREG, &nullgen);
}
/*
* B.29 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);
}
/*
* B.30 coprocessor operate
*/
| LCPOP creg ',' creg
{
outcode($1, &$2, NREG, &$4);
}
| LCPOP creg ',' creg ',' creg
{
outcode($1, &$2, $4.reg, &$6);
}
/*
* CMP
*/
| LCMP rreg ',' rreg
{
outcode($1, &$2, NREG, &$4);
}
| LCMP rreg ',' imm
{
outcode($1, &$2, NREG, &$4);
}
/*
* 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);
}
/*
* 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);
}
/*
* 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;
}
fsr:
LFSR
{
$$ = nullgen;
$$.type = D_PREG;
$$.reg = $1;
}
fpq:
LFPQ
{
$$ = nullgen;
$$.type = D_PREG;
$$.reg = $1;
}
psr:
LPSR
{
$$ = nullgen;
$$.type = D_PREG;
$$.reg = $1;
}
creg:
LCREG
{
$$ = nullgen;
$$.type = D_CREG;
$$.reg = $1;
}
| LC '(' con ')'
{
$$ = nullgen;
$$.type = D_CREG;
$$.reg = $3;
}
freg:
LFREG
{
$$ = nullgen;
$$.type = D_FREG;
$$.reg = $1;
}
| LF '(' con ')'
{
$$ = nullgen;
$$.type = D_FREG;
$$.reg = $3;
}
ximm:
'$' addr
{
$$ = $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");
$$ = $3;
}
addr:
'(' sreg ')'
{
$$ = nullgen;
$$.type = D_OREG;
$$.reg = $2;
$$.offset = 0;
}
| '(' sreg ',' con ')'
{
$$ = nullgen;
$$.type = D_ASI;
$$.reg = $2;
$$.offset = $4;
}
| '(' sreg '+' sreg ')'
{
$$ = nullgen;
$$.type = D_OREG;
$$.reg = $2;
$$.xreg = $4;
$$.offset = 0;
}
| 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;
}