Language syntax:
// comment
/* comment */
def const = expr ;
def function-name ()
{
  /* statements */
}
def function-name ( arg [ , arg ]... )
{
  /* statements */
}
return;
return expr;
var-statement:
    var variable-def [ , variable-def ]... ;
    
variable-def:
    variable [ scalar-initializer ]
    variable '[' size ']' [ array-initializer ]
    
scalar-initializer:
    = constant-expr
    
array-initializer:
    = { constant-expr [ , constant-expr ]... }
if ( expr ) statement
if ( expr ) statement else statement
for ( init-expr; test-expr; inc-expr ) statement
while ( test-expr ) statement
do statement while ( test-expr )
continue ;
break ;
label :
goto label ;
print expr [ $|, expr ]... [ $ ] ;
expr = expr
expr += expr
expr -= expr
expr *= expr
expr /= expr
expr %= expr
expr &= expr
expr |= expr
expr ^= expr
expr <<= expr
expr >>= expr
expr && expr
expr || expr
expr ^ expr
expr | expr
expr & expr
expr == expr
expr !=  expr
expr < expr
expr <= expr
expr >= expr
expr > expr
expr << expr
expr >> expr
expr + expr
expr - expr
expr * expr
expr / expr
expr % expr
- expr
~ expr
! expr
++expr
--expr
expr++
expr--
function()
function ( arg [, arg ]... )
array [ index ]
(expr)
var
integer
"string"
Built-in variables:
clkfreq
par
cnt
ina
inb
outa
outb
dira
dirb
ctra
ctrb
frqa
frqb
phsa
phsb
vcfg
vscl
Built-in Functions:
waitcnt(target)
waitpeq(state, mask)
waitpne(state, mask)