diff options
Diffstat (limited to 'grammar.wsn')
| -rw-r--r-- | grammar.wsn | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/grammar.wsn b/grammar.wsn new file mode 100644 index 0000000..23aca49 --- /dev/null +++ b/grammar.wsn @@ -0,0 +1,48 @@ +program = { statement } . +statement = ( directive | label | instr | assignment | comment ) nl . +comment = ( ";" | "*" ) { CHAR } . +label = ID ":" . +directive = [ label ] DOT_ID { DOT_ID | ID | number } [ comment ] . +instr = [ label ] mnemonic [ "." insn_size_spec ] [ arg [ "," arg ] ] [ comment ] . +assignment = [ label ] ID ( "=" | "==" ) expr [ comment ] . +arg = dn | an | "-" an_addr | an_addr [ "+" ] | an_pc_d8 | an_pc_d16 + | addr . +addr = expr [ "." addr_size_spec ] . +an_pc_d8 = expr "(" subarg "," subarg ")" + | "(" expr "," subarg "," subarg ")" . +an_pc_d16 = expr "(" subarg ")" | "(" subarg "," subarg ")" . +an_addr = "(" an ")" . +subarg = expr | an | pc | d8 +expr = { unary_oparator } ( "(" expr ")" | expr operator expr | ID | number ) . +operator = ( "+" | "-" | "*" | "/" | "&" | "|" ) . +unary = ( "~" | "-" ) . +pc = ( "pc" | "PC" ) . +dn = ( "d" | "D" ) OCT . +an = ( "a" | "A" ) OCT . +number = ( NUMHEX | NUMDEC | NUMOCT ) . +comment = ( NUMHEX | NUMDEC | NUMOCT ) . +nl = "\n" | "\r\n" | "\r"; +insn_size_spec = "s" | "S" | addr_size_spec . +addr_size_spec = "b" | "B" | "w" | "W" | "l" | "L" . +NUMHEX = ( "$" | "0" ("x" | "X") ) HEX { HEX } . +NUMDEC = "0" | DEC { DEC } . +NUMOCT = ( "@" | "0" ) OCT { OCT } . +STRING = """" { STR_CHAR } """" . +DOT_ID = "." ID . +ID = (ALPHA | "_" ) { ALPHANUM | "_" } . + +STR_CHAR = "\n" | "\r" | CHAR . +CHAR = "\t" | " " | "!" | "#" | "$" | "%" | "&" | "'" | "(" | ")" | "*" + | "+" | "," | "." | "/" | ":" | ";" | "<" | "=" | ">" | "?" | "@" + | "[" | "\" | "]" | "%" | "`" | "{" | "|" | "}" | "~" | "\""" + | ALPHANUM . +ALPHANUM = DEC | ALPHA . +HEX = DEC | "a" | "A" | "b" | "B" | "c" | "C" | "d" | "D" | "e" | "E" | "f" + | "F" . +DEC = OCT | "8" | "9" . +OCT = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7". +ALPHA = "A" | "B" | "C" | "D" | "E" | "F" | "G" | "H" | "I" | "J" | "K" | "L" + | "M" | "N" | "O" | "P" | "Q" | "R" | "S" | "T" | "U" | "V" | "W" | "X" + | "Y" | "Z" | "a" | "b" | "c" | "d" | "e" | "f" | "g" | "h" | "i" | "j" + | "k" | "l" | "m" | "n" | "o" | "p" | "q" | "r" | "s" | "t" | "u" | "v" + | "w" | "x" | "y" | "z" . |