ref: 50791b875552b0dc5748aa67c95776736f6ff4b7
dir: /sys/src/cmd/aux/na/na.y/
/* NCR53c8xx assembler */
%{
#include <u.h>
#include <libc.h>
#include <stdio.h>
#include <ctype.h>
#include "na.h"
#define COND_WAIT (1L << 16)
#define COND_TRUE (1L << 19)
#define COND_INTFLY (1L << 20)
#define COND_CARRY (1L << 21)
#define COND_REL (1L << 23)
#define COND_PHASE (1L << 17)
#define COND_DATA (1L << 18)
#define IO_REL (1L << 26)
#define MOVE_MODE (1L << 27)
int yylex(void);
int yyparse(void);
void assemble(void);
void yyerror(char *, ...);
void yywarn(char *, ...);
void p2error(int line, char *);
struct addr {
int type; /* 0 - direct, 1 - indirect 2 - table indirect */
unsigned long offset;
};
typedef enum Type { Const, Addr, Table, Extern, Reg, Unknown, Error } Type;
struct sym {
char *name;
int set;
Type t;
long value;
struct sym *next;
};
struct sym *findsym(char *name);
struct sym *symlist;
void newsym(struct sym *s, Type t, long v);
struct binary {
char len;
unsigned long data[3];
unsigned char patch[3];
};
#define MAXCPPOPTS 30
#define MAX_PATCHES 1000
struct na_patch patch[MAX_PATCHES];
int patches;
struct binary out;
struct expval {
Type t;
long value;
};
struct expval eval(struct expval a, struct expval b, char op);
int patchtype(Type t);
void fixup(void);
unsigned dot;
unsigned externs;
int errors, warnings;
struct sym *externp[100];
void regmove(unsigned char src_reg, unsigned char op,
unsigned char dst_reg, struct expval *imm);
void preprocess(char *in, FILE *out);
int mk24bitssigned(long *l);
long mkreladdr(long value, int len);
long chkreladdr(int d, struct expval *e, int len, long relrv);
int pass2;
FILE *in_f;
int yyline = 0;
char yyfilename[200];
char line[500];
char *cppopts[MAXCPPOPTS];
int ncppopts;
int wflag;
%}
%union {
long n;
struct sym *s;
struct expval e;
}
%token NUM MOVE WHEN SYMBOL SELECT WAIT DISCONNECT RESELECT SET CLEAR
%token DATA_OUT DATA_IN COMMAND STATUS RESERVED_OUT RESERVED_IN MESSAGE_OUT
%token MESSAGE_IN WITH ATN FAIL CARRY TARGET ACK COMMENT TO
%token SCNTL0 SCNTL1 SCNTL2 SCNTL3 SCID SXFER SDID GPREG
%token SFBR SOCL SSID SBCL DSTAT SSTAT0 SSTAT1 SSTAT2
%token ISTAT CTEST0 CTEST1 CTEST2 CTEST3 TEMP DFIFO CTEST4 CTEST5 CTEST6
%token DBC DCMD DNAD DSP DSPS DMODE DIEN DWT DCNTL ADDER
%token SIEN0 SIEN1 SIST0 SIST1 SLPAR MACNTL GPCNTL STIME0 STIME1 RESPID
%token STEST0 STEST1 STEST2 STEST3 SIDL SODL SBDL
%token SHL SHR AND OR XOR ADD ADDC
%token JUMP CALL RETURN INT INTFLY NOT ABSOLUTE MASK IF REL PTR
%token TABLE FROM MEMORY NOP EXTERN
%token SCRATCHA0 SCRATCHA1 SCRATCHA2 SCRATCHA3
%token SCRATCHB0 SCRATCHB1 SCRATCHB2 SCRATCHB3
%token SCRATCHC0 SCRATCHC1 SCRATCHC2 SCRATCHC3
%token DSA0 DSA1 DSA2 DSA3
%token DEFW
%left '-' '+'
%left '*' '/'
%left NEG /* negation--unary minus */
%right '^' /* exponentiation */
%type <n> NUM phase .atn set_list set_bit regA reg
%type <n> set_cmd .cond condsfbr condphase
%type <n> jump_or_call .ptr
%type <s> SYMBOL
%type <e> exp byteexp regexp
/* Grammar follows */
%%
input: /* empty string */
| input line
;
line: .label .opcode .comment '\n'
{
if (pass2) {
int x;
for (x = 0; x < out.len; x++) {
printf("/* %.4x */ 0x%.8lxL,",
dot, out.data[x]);
if (x == 0) {
printf(" /*\t");
fwrite(line,
strlen(line) - 1, 1, stdout);
printf(" */");
}
printf("\n");
if (out.patch[x]) {
patch[patches].lwoff = dot / 4;
patch[patches].type = out.patch[x];
patches++;
}
dot += 4;
}
}
else
dot += 4 * out.len;
}
| ABSOLUTE SYMBOL '=' exp .comment '\n'
{
setsym($2, $4.t, $4.value);
if (pass2) {
printf("\t\t\t/*\t");
fwrite(line, strlen(line) - 1, 1, stdout);
printf(" */\n");
}
}
| SYMBOL '=' exp .comment '\n'
{
setsym($1, $3.t, $3.value);
if (pass2) {
printf("\t\t\t/*\t");
fwrite(line, strlen(line) - 1, 1, stdout);
printf(" */\n");
}
}
| EXTERN SYMBOL {
if (pass2) {
printf("\t\t\t/*\t");
fwrite(line, strlen(line) - 1, 1, stdout);
printf(" */\n");
}
else {
if (!pass2)
externp[externs] = $2;
setsym($2, Extern, externs++);
}
}
;
.comment: COMMENT
| /* nothing */
;
.label: SYMBOL ':' {
if ($1->t != Unknown)
{
if (!pass2)
yyerror("multiply defined symbol");
}
else {
$1->t = Addr;
$1->value = dot;
}
}
| /* nothing */
;
set_cmd: SET { $$ = 3; }
| CLEAR { $$ = 4; }
;
set_bit: CARRY { $$ = 0x400; }
| TARGET { $$ = 0x200; }
| ACK { $$ = 0x40; }
| ATN { $$ = 0x8; }
;
set_list: set_list ',' set_bit { $$ = $1 | $3; }
| set_list AND set_bit { $$ = $1 | $3; }
| set_bit { $$ = $1; }
;
opcode: set_cmd set_list {
out.len = 2;
out.data[0] = (1L << 30) | ((long)$1 << 27) | $2;
out.data[1] = 0;
out.patch[0] = out.patch[1] = 0;
}
| DISCONNECT
{
out.len = 2;
out.data[0] = 0x48020000L;
out.data[1] = 0;
out.patch[0] = out.patch[1] = 0;
}
| INT exp .cond {
out.len = 2;
out.data[0] = $3 | 0x98000000L;
out.data[1] = $2.value;
out.patch[0] = out.patch[1] = 0;
}
| INTFLY exp .cond {
out.len = 2;
out.data[0] = $3 | 0x98000000L | COND_INTFLY;
out.data[1] = $2.value;
out.patch[0] = out.patch[1] = 0;
}
| jump_or_call exp .cond {
out.len = 2;
out.data[0] = $1 | $3 | chkreladdr(1, &$2, 2, COND_REL);
out.patch[0] = 0;
}
| jump_or_call REL '(' exp ')' .cond {
out.len = 2;
out.data[0] = $1 | $6 | COND_REL;
out.data[1] = mkreladdr($4.value, 2);
out.patch[0] = out.patch[1] = 0;
}
| MOVE exp ',' .ptr regexp ',' with_or_when phase {
out.len = 2;
out.data[0] = ($8 << 24) | $2.value | ($4 << 29) | MOVE_MODE;
out.data[1] = $5.value;
out.patch[0] = 0;
out.patch[1] = patchtype($5.t);
}
| MOVE FROM exp ',' with_or_when phase {
out.len = 2;
out.data[0] = ($6 << 24) | (1L << 28) | MOVE_MODE;
out.data[1] = $3.value;
out.patch[0] = 0;
out.patch[1] = patchtype($3.t);
}
| MOVE MEMORY exp ',' regexp ',' regexp {
out.len = 3;
out.data[0] = 0xc0000000L | $3.value;
out.data[1] = $5.value;
out.data[2] = $7.value;
out.patch[0] = 0;
out.patch[1] = patchtype($5.t);
out.patch[2] = patchtype($7.t);
}
| MOVE regA TO regA { regmove($2, 2, $4, 0); } /* do reg to sfbr moves using or 0 */
| MOVE exp TO regA { regmove($4, 0, $4, &$2); }
| MOVE regA '|' exp TO regA { regmove($2, 2, $6, &$4); }
| MOVE regA '&' exp TO regA { regmove($2, 4, $6, &$4); }
| MOVE regA '+' exp TO regA { regmove($2, 6, $6, &$4); }
| MOVE regA '-' exp TO regA { regmove($2, 6, $6, &$4); }
| MOVE regA '+' exp TO regA WITH CARRY {
regmove($2, 7, $6, &$4);
}
| MOVE regA '-' exp TO regA WITH CARRY {
$4.value = -$4.value;
regmove($2, 7, $6, &$4);
}
| MOVE regA SHL TO regA { regmove($2, 1, $5, 0); }
| MOVE regA SHR TO regA { regmove($2, 5, $5, 0); }
| MOVE regA XOR exp TO regA { regmove($2, 3, $6, &$4); }
| NOP {
out.len = 2;
out.data[0] = 0x80000000L;
out.data[1] = 0;
out.patch[0] = out.patch[1] = 0;
}
| RESELECT exp ',' exp {
out.len = 2;
out.data[0] = 0x40000000L | ((long)$2.value << 16) | (1L << 9) | chkreladdr(1, &$4, 2, IO_REL);
out.patch[0] = 0;
}
| RESELECT exp ',' REL '(' exp ')' {
out.len = 2;
out.data[0] = 0x40000000L | IO_REL
| ((long)$2.value << 16) | (1L << 9);
out.data[1] = mkreladdr($6.value, 2);
out.patch[0] = out.patch[1] = 0;
}
| RESELECT FROM exp ',' exp {
out.len = 2;
out.data[0] = 0x40000000L | (1L << 25) | $3.value | chkreladdr(1, &$5, 2, IO_REL);
out.patch[0] = 5;
}
| RESELECT FROM exp ',' REL '(' exp ')' {
out.len = 2;
out.data[0] = 0x40000000L | (1L << 25) | IO_REL | $3.value;
out.patch[0] = 5;
out.data[1] = mkreladdr($7.value, 2);
out.patch[1] = 0;
}
| RETURN .cond {
out.len = 2;
out.data[0] = 0x90000000L | $2;
out.data[1] = 0;
out.patch[0] = out.patch[1] = 0;
}
| SELECT .atn exp ',' exp {
out.len = 2;
out.data[0] =
0x40000000L | ((long)$3.value << 16) | (1L << 9) | $2 | chkreladdr(1, &$5, 2, IO_REL);
out.patch[0] = 0;
}
| SELECT .atn exp ',' REL '(' exp ')' {
out.len = 2;
out.data[0] = 0x40000000L | (1L << 26)
| ((long)$3.value << 16) | (1L << 9) | $2;
out.data[1] = mkreladdr($7.value, 2);
out.patch[0] = out.patch[1] = 0;
}
| SELECT .atn FROM exp ',' exp {
out.len = 2;
out.data[0] = 0x40000000L | (1L << 25) | $4.value | $2 | chkreladdr(1, &$6, 2, IO_REL);
out.patch[0] = 5;
}
| SELECT .atn FROM exp ',' REL '(' exp ')' {
out.len = 2;
out.data[0] = 0x40000000L | (1L << 25) | IO_REL | $4.value | $2;
out.patch[0] = 5;
out.data[1] = mkreladdr($8.value, 2);
out.patch[1] = 0;
}
| WAIT DISCONNECT {
out.len = 2;
out.data[0] = 0x48000000L;
out.data[1] = 0;
out.patch[0] = out.patch[1] = 0;
}
| WAIT RESELECT exp {
out.len = 2;
out.data[0] = 0x50000000L | chkreladdr(1, &$3, 2, IO_REL);
out.patch[0] = 0;
}
| WAIT RESELECT REL '(' exp ')' {
out.len = 2;
out.data[0] = 0x50000000L | (1L << 26);
out.data[1] = mkreladdr($5.value, 2);
out.patch[0] = out.patch[1] = 0;
}
| WAIT SELECT exp {
out.len = 2;
out.data[0] = 0x40000000L | (1L << 9) | chkreladdr(1, &$3, 2, IO_REL);
out.patch[0] = 0;
}
| WAIT SELECT REL '(' exp ')' {
out.len = 2;
out.data[0] = 0x40000000L | (1L << 26) | (1L << 9);
out.data[1] = mkreladdr($5.value, 2);
out.patch[0] = out.patch[1] = 0;
}
| DEFW exp {
out.len = 1;
out.data[0] = $2.value;
out.patch[0] = patchtype($2.t);
}
;
.ptr: PTR { $$ = 1; }
| { $$ = 0; }
;
with_or_when: WITH
| WHEN
;
jump_or_call: JUMP { $$ = 0x80000000L; }
| CALL { $$ = 0x88000000L; }
;
condsfbr: byteexp { $$ = $1.value | COND_DATA; }
| byteexp AND MASK byteexp { $$ = ($4.value << 8) | $1.value | COND_DATA; }
;
condphase: phase { $$ = ($1 << 24) | COND_PHASE; }
.cond: ',' IF ATN { $$ = COND_TRUE; }
| ',' IF condphase { $$ = $3 | COND_TRUE; }
| ',' IF CARRY { $$ = COND_CARRY | COND_TRUE; }
| ',' IF condsfbr { $$ = $3 | COND_TRUE; }
| ',' IF ATN AND condsfbr { $$ = $5 | COND_TRUE; }
| ',' IF condphase AND condsfbr { $$ = $3 | $5 | COND_TRUE; }
| ',' WHEN condphase { $$ = $3 | COND_WAIT | COND_TRUE; }
| ',' WHEN CARRY { $$ = COND_CARRY | COND_WAIT | COND_TRUE; }
| ',' WHEN condsfbr { $$ = $3 | COND_WAIT | COND_TRUE; }
| ',' WHEN condphase AND condsfbr { $$ = $3 | $5 | COND_WAIT | COND_TRUE; }
| ',' IF NOT ATN { $$ = 0; }
| ',' IF NOT condphase { $$ = $4; }
| ',' IF NOT CARRY { $$ = COND_CARRY; }
| ',' IF NOT condsfbr { $$ = $4; }
| ',' IF NOT ATN OR condsfbr { $$ = $6; }
| ',' IF NOT condphase OR condsfbr { $$ = $4 | $6; }
| ',' WHEN NOT condphase { $$ = $4 | COND_WAIT; }
| ',' WHEN NOT CARRY { $$ = COND_CARRY | COND_WAIT; }
| ',' WHEN NOT condsfbr { $$ = $4 | COND_WAIT; }
| ',' WHEN NOT condphase OR condsfbr { $$ = $4 | $6 | COND_WAIT; }
| { $$ = COND_TRUE; }
;
.opcode: opcode
| { out.len = 0; }
;
regA: reg
| SFBR { $$ = 8; }
;
reg: SCNTL0 { $$ = 0; }
| SCNTL1 { $$ = 1; }
| SCNTL2 { $$ = 2; }
| SCNTL3 { $$ = 3; }
| SCID { $$ = 4; }
| SXFER { $$ = 5; }
| SDID { $$ = 6; }
| GPREG { $$ = 7; }
| SOCL { $$ = 9; }
| SSID { $$ = 0xa; }
| SBCL { $$ = 0xb; }
| DSTAT { $$ = 0xc; }
| SSTAT0 { $$ = 0xd; }
| SSTAT1 { $$ = 0xe; }
| SSTAT2 { $$ = 0xf; }
| DSA0 { $$ = 0x10; }
| DSA1 { $$ = 0x11; }
| DSA2 { $$ = 0x12; }
| DSA3 { $$ = 0x13; }
| ISTAT { $$ = 0x14; }
| CTEST0 { $$ = 0x18; }
| CTEST1 { $$ = 0x19; }
| CTEST2 { $$ = 0x1a; }
| CTEST3 { $$ = 0x1b; }
| TEMP { $$ = 0x1c; }
| DFIFO { $$ = 0x20; }
| CTEST4 { $$ = 0x21; }
| CTEST5 { $$ = 0x22; }
| CTEST6 { $$ = 0x23; }
| DBC { $$ = 0x24; }
| DCMD { $$ = 0x27; }
| DNAD { $$ = 0x28; }
| DSP { $$ = 0x2c; }
| DSPS { $$ = 0x30; }
| SCRATCHA0 { $$ = 0x34; }
| SCRATCHA1 { $$ = 0x35; }
| SCRATCHA2 { $$ = 0x36; }
| SCRATCHA3 { $$ = 0x37; }
| DMODE { $$ = 0x38; }
| DIEN { $$ = 0x39; }
| DWT { $$ = 0x3a; }
| DCNTL { $$ = 0x3b; }
| ADDER { $$ = 0x3c; }
| SIEN0 { $$ = 0x40; }
| SIEN1 { $$ = 0x41; }
| SIST0 { $$ = 0x42; }
| SIST1 { $$ = 0x43; }
| SLPAR { $$ = 0x44; }
| MACNTL { $$ = 0x46; }
| GPCNTL { $$ = 0x47; }
| STIME0 { $$ = 0x48; }
| STIME1 { $$ = 0x49; }
| RESPID { $$ = 0x4a; }
| STEST0 { $$ = 0x4c; }
| STEST1 { $$ = 0x4d; }
| STEST2 { $$ = 0x4e; }
| STEST3 { $$ = 0x4f; }
| SIDL { $$ = 0x50; }
| SODL { $$ = 0x54; }
| SBDL { $$ = 0x58; }
| SCRATCHB0 { $$ = 0x5c; }
| SCRATCHB1 { $$ = 0x5d; }
| SCRATCHB2 { $$ = 0x5e; }
| SCRATCHB3 { $$ = 0x5f; }
| SCRATCHC0 { $$ = 0x60; }
| SCRATCHC1 { $$ = 0x61; }
| SCRATCHC2 { $$ = 0x62; }
| SCRATCHC3 { $$ = 0x63; }
;
.atn: ATN { $$ = (1 << 24); }
| /* nothing */ { $$ = 0; }
;
phase: DATA_OUT { $$ = 0; }
| DATA_IN { $$ = 1; }
| COMMAND { $$ = 2; }
| STATUS { $$ = 3; }
| RESERVED_OUT { $$ = 4; }
| RESERVED_IN { $$ = 5; }
| MESSAGE_OUT { $$ = 6; }
| MESSAGE_IN { $$ = 7; }
;
byteexp: exp
{
if (pass2 && ($1.value < 0 || $1.value > 255)) {
if (wflag)
yywarn("conversion causes truncation");
$$.value = $1.value & 0xff;
}
else
$$.value = $1.value;
}
;
regexp: exp
| regA { $$.t = Reg; $$.value = $1; }
;
exp: NUM { $$.t = Const; $$.value = $1; }
| SYMBOL {
$$.t = $1->t; $$.value = $1->value;
if (pass2 && $1->t == Unknown)
{
yyerror("Undefined symbol %s", $1->name);
$1->t = Error;
$1->value = 0;
$$.t = Error;
$$.value = 0;
}
}
| exp '+' exp { $$ = eval($1, $3, '+'); }
| exp '-' exp { $$ = eval($1, $3, '-'); }
| exp '*' exp { $$ = eval($1, $3, '*'); }
| exp '/' exp { $$ = eval($1, $3, '/'); }
| '-' exp %prec NEG { $$ = eval($2, $2, '_'); }
| '(' exp ')' { $$ = $2; }
| '~' exp %prec NEG { $$ = eval($2, $2, '~'); }
;
%%
struct {
char *name;
int tok;
} toktab[] =
{
{ "when", WHEN },
{ "data_out", DATA_OUT },
{ "data_in", DATA_IN },
{ "msg_out", MESSAGE_OUT },
{ "msg_in", MESSAGE_IN },
{ "cmd", COMMAND },
{ "command", COMMAND },
{ "status", STATUS },
{ "move", MOVE },
{ "select", SELECT },
{ "reselect", RESELECT },
{ "disconnect", DISCONNECT },
{ "wait", WAIT },
{ "set", SET },
{ "clear", CLEAR },
{ "with", WITH },
{ "atn", ATN },
{ "fail", FAIL },
{ "carry", CARRY },
{ "target", TARGET },
{ "ack", ACK },
{ "scntl0", SCNTL0 },
{ "scntl1", SCNTL1 },
{ "scntl2", SCNTL2 },
{ "scntl3", SCNTL3 },
{ "scid", SCID },
{ "sxfer", SXFER },
{ "sdid", SDID },
{ "gpreg", GPREG },
{ "sfbr", SFBR },
{ "socl", SOCL },
{ "ssid", SSID },
{ "sbcl", SBCL },
{ "dstat", DSTAT },
{ "sstat0", SSTAT0 },
{ "sstat1", SSTAT1 },
{ "sstat2", SSTAT2 },
{ "dsa", DSA0 },
{ "dsa0", DSA0 },
{ "dsa1", DSA1 },
{ "dsa2", DSA2 },
{ "dsa3", DSA3 },
{ "istat", ISTAT },
{ "ctest0", CTEST0 },
{ "ctest1", CTEST1 },
{ "ctest2", CTEST2 },
{ "ctest3", CTEST3 },
{ "temp", TEMP },
{ "dfifo", DFIFO },
{ "ctest4", CTEST4 },
{ "ctest5", CTEST5 },
{ "ctest6", CTEST6 },
{ "dbc", DBC },
{ "dcmd", DCMD },
{ "dnad", DNAD },
{ "dsp", DSP },
{ "dsps", DSPS },
{ "scratcha", SCRATCHA0 },
{ "scratcha0", SCRATCHA0 },
{ "scratcha1", SCRATCHA1 },
{ "scratcha2", SCRATCHA2 },
{ "scratcha3", SCRATCHA3 },
{ "dmode", DMODE },
{ "dien", DIEN },
{ "dwt", DWT },
{ "dcntl", DCNTL },
{ "adder", ADDER },
{ "sien0", SIEN0 },
{ "sien1", SIEN1 },
{ "sist0", SIST0 },
{ "sist1", SIST1 },
{ "slpar", SLPAR },
{ "macntl", MACNTL },
{ "gpcntl", GPCNTL },
{ "stime0", STIME0 },
{ "stime1", STIME1 },
{ "respid", RESPID },
{ "stest0", STEST0 },
{ "stest1", STEST1 },
{ "stest2", STEST2 },
{ "stest3", STEST3 },
{ "sidl", SIDL },
{ "sodl", SODL },
{ "sbdl", SBDL },
{ "scratchb", SCRATCHB0 },
{ "scratchb0", SCRATCHB0 },
{ "scratchb1", SCRATCHB1 },
{ "scratchb2", SCRATCHB2 },
{ "scratchb3", SCRATCHB3 },
{ "scratchc", SCRATCHC0 },
{ "scratchc0", SCRATCHC0 },
{ "scratchc1", SCRATCHC1 },
{ "scratchc2", SCRATCHC2 },
{ "scratchc3", SCRATCHC3 },
{ "add", ADD },
{ "addc", ADDC },
{ "and", AND },
{ "or", OR },
{ "xor", XOR },
{ "shl", SHL },
{ "shr", SHR },
{ "jump", JUMP },
{ "call", CALL },
{ "return", RETURN },
{ "int", INT },
{ "intfly", INTFLY },
{ "not", NOT },
{ "absolute", ABSOLUTE },
{ "mask", MASK },
{ "if", IF },
{ "rel", REL },
{ "ptr", PTR },
{ "table", TABLE },
{ "from", FROM },
{ "memory", MEMORY },
{ "to", TO },
{ "nop", NOP },
{ "extern", EXTERN },
{ "defw", DEFW },
};
#define TOKS (sizeof(toktab)/sizeof(toktab[0]))
int lc;
int ll;
void
yyrewind(void)
{
rewind(in_f);
ll = lc = 0;
yyline = 0;
dot = 0;
}
int
yygetc(void)
{
if (lc == ll)
{
next:
if (fgets(line, 500, in_f) == 0)
return EOF;
/* do nasty check for #line directives */
if (strncmp(line, "#line", 5) == 0) {
/* #line n "filename" */
sscanf(line, "#line %d \"%[^\"]", &yyline, yyfilename);
yyline--;
goto next;
}
yyline++;
ll = strlen(line);
lc = 0;
}
return line[lc++];
}
void
yyungetc(void)
{
if (lc <= 0)
exits("ungetc");
lc--;
}
int
yylex(void)
{
char token[100];
int tl = 0;
int c;
while ((c = yygetc()) != EOF && (c == ' ' || c == '\t'))
;
if (c == EOF)
return 0;
if (isalpha(c) || c == '_')
{
int x;
do {
token[tl++] = c;
} while ((c = yygetc()) != EOF && (isalnum(c) || c == '_'));
if (c == EOF)
return 0;
yyungetc();
token[tl] = 0;
for (x = 0; x < TOKS; x++)
if (strcmp(toktab[x].name, token) == 0)
return toktab[x].tok;
/* must be a symbol */
yylval.s = findsym(token);
return SYMBOL;
}
else if (isdigit(c))
{
/* accept 0x<digits> or 0b<digits> 0<digits> or <digits> */
int prefix = c == '0';
unsigned long n = c - '0';
int base = 10;
for (;;)
{
c = yygetc();
if (c == EOF)
return 0;
if (prefix)
{
prefix = 0;
if (c == 'x') {
base = 16;
continue;
}
else if (c == 'b')
{
base = 2;
continue;
}
else
base = 8;
}
if (isdigit(c))
c -= '0';
else if (isalpha(c) && base > 10)
{
if (isupper(c))
c = tolower(c);
c = c - 'a' + 10;
}
else {
yyungetc();
yylval.n = n;
return NUM;
}
if (c >= base)
yyerror("illegal format number");
n = n * base + c;
}
}
else if (c == ';') {
/* skip to end of line */
while ((c = yygetc()) != EOF && c != '\n')
;
if (c != EOF)
yyungetc();
return COMMENT;
}
return c;
}
void
yyerror(char *s, ...)
{
va_list ap;
va_start(ap, s);
fprintf(stderr, "%s: %d: ", yyfilename, yyline);
vfprintf(stderr, s, ap);
if (putc('\n', stderr) < 0)
exits("io");
errors++;
va_end(ap);
}
void
yywarn(char *s, ...)
{
va_list ap;
va_start(ap, s);
fprintf(stderr, "%s: %d: warning: ", yyfilename, yyline);
vfprintf(stderr, s, ap);
if (putc('\n', stderr) < 0)
exits("io");
warnings++;
va_end(ap);
}
void
p2error(int line, char *s)
{
USED(line);
printf("/*\t%s */\n", s);
}
void
main(int argc, char *argv[])
{
int a;
for (a = 1; a < argc; a++)
{
if (argv[a][0] == '-')
switch (argv[a][1]) {
case 'D':
/* #defines for cpp */
if (ncppopts >= MAXCPPOPTS) {
fprintf(stderr, "too many cpp options\n");
exits("options");
}
cppopts[ncppopts++] = argv[a];
break;
default:
fprintf(stderr, "unrecognised option %s\n",
argv[a]);
exits("options");
}
else
break;
}
if (a != argc - 1)
{
fprintf(stderr, "usage: na [options] file\n");
exits("options");
}
if (access(argv[a], 4) < 0) {
fprintf(stderr, "can't read %s\n", argv[a]);
exits("");
}
in_f = tmpfile();
preprocess(argv[a], in_f);
rewind(in_f);
strcpy(yyfilename, argv[a]);
yyparse();
if (errors)
exits("pass1");
pass2 = 1;
printf("unsigned long na_script[] = {\n");
yyrewind();
yyparse();
printf("};\n");
printf("\n");
printf("#define NA_SCRIPT_SIZE %d\n", dot / 4);
printf("\n");
fixup();
/*
assemble();
*/
exits(errors ? "pass2" : "");
}
void
preprocess(char *in, FILE *out)
{
Waitmsg *w;
char **argv;
if (fork() == 0) {
/* child */
dup(fileno(out), 1);
argv = (char **)malloc(sizeof(char *) * (ncppopts + 5));
argv[0] = "cpp";
memcpy(&argv[1], cppopts, sizeof(char *) * ncppopts);
argv[ncppopts + 1] = "-+";
argv[ncppopts + 2] = "-N";
argv[ncppopts + 3] = in;
argv[ncppopts + 4] = 0;
exec("/bin/cpp", argv);
fprintf(stderr, "failed to exec cpp (%R)\n");
exits("exec");
}
w = wait();
free(w);
}
struct sym *
findsym(char *name)
{
struct sym *s;
for (s = symlist; s; s = s->next)
if (strcmp(name, s->name) == 0)
return s;
s = (struct sym *)malloc(sizeof(*s));
s->name = strdup(name);
s->t = Unknown;
s->set = 0;
s->next = symlist;
symlist = s;
return s;
}
void
setsym(struct sym *s, Type t, long v)
{
if (pass2) {
if (t == Unknown || t == Error)
yyerror("can't resolve symbol");
else {
s->t = t;
s->value = v;
}
}
else {
if (s->set)
yyerror("multiply defined symbol");
s->set = 1;
s->t = t;
s->value = v;
}
}
int
mk24bitssigned(long *l)
{
if (*l < 0) {
if ((*l & 0xff800000L) != 0xff800000L) {
*l = 0;
return 0;
}
else
*l = (*l) & 0xffffffL;
}
else if (*l > 0xffffffL) {
*l = 0;
return 0;
}
return 1;
}
static Type addresult[5][5] = {
/* Const Addr Table Extern Reg */
/* Const */ Const, Addr, Table, Error, Reg,
/* Addr */ Addr, Error, Error, Error, Error,
/* Table */ Table, Error, Error, Error, Error,
/* Extern */ Error, Error, Error, Error, Error,
/* Reg */ Reg, Error, Error, Error, Error,
};
static Type subresult[5][5] = {
/* Const Addr Table Extern Reg */
/* Const */ Const, Error, Error, Error, Error,
/* Addr */ Addr, Const, Error, Error, Error,
/* Table */ Table, Error, Const, Error, Error,
/* Extern */ Error, Error, Error, Const, Error,
/* Reg */ Error, Error, Error, Error, Error,
};
static Type muldivresult[5][5] = {
/* Const Addr Table Extern */
/* Const */ Const, Error, Error, Error, Error,
/* Addr */ Error, Error, Error, Error, Error,
/* Table */ Error, Error, Error, Error, Error,
/* Extern */ Error, Error, Error, Error, Error,
/* Reg */ Error, Error, Error, Error, Error,
};
static Type negresult[] = {
/* Const */ Const,
/* Addr */ Error,
/* Table */ Error,
/* Extern */ Error,
/* Reg */ Error,
};
int
patchtype(Type t)
{
switch (t) {
case Addr:
return 1;
case Reg:
return 2;
case Extern:
return 4;
default:
return 0;
}
}
struct expval
eval(struct expval a, struct expval b, char op)
{
struct expval c;
if (a.t == Unknown || b.t == Unknown) {
c.t = Unknown;
c.value = 0;
}
else if (a.t == Error || b.t == Error) {
c.t = Error;
c.value = 0;
}
else {
switch (op) {
case '+':
c.t = addresult[a.t][b.t];
break;
case '-':
c.t = subresult[a.t][b.t];
break;
case '*':
case '/':
c.t = muldivresult[a.t][b.t];
break;
case '_':
case '~':
c.t = negresult[a.t];
break;
default:
c.t = Error;
break;
}
if (c.t == Error) {
if (pass2)
yyerror("type clash in evaluation");
c.value = 0;
}
else {
switch (op) {
case '+':
c.value = a.value + b.value;
break;
case '-':
c.value = a.value - b.value;
break;
case '*':
c.value = a.value * b.value;
break;
case '/':
c.value = a.value / b.value;
break;
case '_':
c.value = -a.value;
break;
case '~':
c.value = ~a.value;
break;
}
}
}
return c;
}
void
regmove(unsigned char src_reg, unsigned char op,
unsigned char dst_reg, struct expval *imm)
{
unsigned char func, reg;
int immdata;
out.len = 2;
if (src_reg == 8) {
func = 5;
reg = dst_reg;
}
else if (dst_reg == 8) {
func = 6;
reg = src_reg;
}
else {
if (pass2 && src_reg != dst_reg)
yyerror("Registers must be the same");
func = 7;
reg = src_reg;
}
immdata = imm ? (imm->value & 0xff) : 0;
out.data[0] = 0x40000000L
| ((long)func << 27)
| ((long)op << 24)
| ((long)reg << 16)
| ((long)(immdata) << 8);
out.data[1] = 0;
out.patch[0] = (imm && imm->t == Extern) ? 3 : 0;
out.patch[1] = 0;
}
long
mkreladdr(long addr, int len)
{
long rel;
rel = addr - (dot + 4 * len);
mk24bitssigned(&rel);
return rel;
}
long
chkreladdr(int d, struct expval *e, int len, long relrv)
{
if (e->t == Addr) {
out.data[d] = mkreladdr(e->value, len);
out.patch[d] = 0;
return relrv;
} else {
out.data[d] = e->value;
out.patch[d] = patchtype(e->t);
return 0;
}
}
void
fixup(void)
{
struct sym *s;
int p;
printf("struct na_patch na_patches[] = {\n");
for (p = 0; p < patches; p++) {
printf("\t{ 0x%.4x, %d }, /* %.8lx */\n",
patch[p].lwoff, patch[p].type, patch[p].lwoff * 4L);
}
if (patches == 0) {
printf("\t{ 0, 0 },\n");
}
printf("};\n");
printf("#define NA_PATCHES %d\n", patches);
printf("\n");
if (externs) {
printf("enum na_external {\n");
for (p = 0; p < externs; p++) {
printf("\tX_%s,\n", externp[p]->name);
}
printf("};\n");
}
/* dump all labels (symbols of type Addr) as E_<Name> */
for (s = symlist; s; s = s->next)
if (s->t == Addr)
break;
if (s) {
printf("\nenum {\n");
while (s) {
if (s->t == Addr)
printf("\tE_%s = %ld,\n", s->name, s->value);
s = s->next;
}
printf("};\n");
}
/* dump all Consts as #define A_<Name> value */
for (s = symlist; s; s = s->next)
if (s->t == Const)
printf("#define A_%s %ld\n", s->name, s->value);
}