shithub: spirva

ref: ca99199e72dc182d2801eb591cdf470c707c1e6c
dir: /spirva.y/

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%{
#include <u.h>
#include "sym.h"
#include "asm.h"

int debug;

extern int yylex(void);
extern int yyparse(void);
%}
%union {
	uint op;
	double f;
	int i;
	Symbol *sym;
	char *str;
}
%token <sym> SYM
%token <op> OP
%token <f> FLOAT
%token <i> INT
%token <str> STR
%right '='
%%
list: /* nothing */
	| list '\n'
	| list SYM '=' oplist '\n' { a_result($2); asm(); }
	| list oplist '\n' { asm(); }
	;

oplist: OP arglist { a_op($1); }
	;

arglist: /* nothing */
	| arglist arg
	;

arg: SYM { a_var($1); }
	| INT { a_int($1); }
	| FLOAT { a_float($1); }
	| str
	| STR { a_keyword($1); }
	;

str: '"' STR '"' { a_str($2); }
%%
	/* end of grammar */
#include <libc.h>
#include <bio.h>

void
init(void) {
	a_init();
}

void
asm(void) {
	assemble();
}

void
main(int argc, char **argv)
{
	ARGBEGIN{
	case 'd':
		debug++;
		break;
	}ARGEND;
	
	u32int magic = 0x07230203;
	write(1, &magic, sizeof(u32int));
	
	for (init(); yyparse(); init())
		asm();
}

void
yyerror(char *s)
{
	fprint(2, "error: %s\n", s);
}