Created
February 20, 2013 04:19
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macro(sweet.js) for asm.js
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macro asmfn { | |
case $name:ident ($params ...) { $body ... } => { | |
function $name(asmfn_params($params ...)) { | |
'use asm'; | |
asmfn_convparams($params ...) | |
$body ... | |
} | |
} | |
// case $name:ident ($params ...): $ret_type { $body ... } => { | |
// macro ret { | |
// case $ret:expr => { | |
// return asmfn_type(($ret), $ret_type) | |
// } | |
// } | |
// } | |
} | |
macro asmfn_params { | |
// TODO : joinSyntax | |
case ,($params ...) => { | |
asmfn_params($params ...) | |
} | |
case ($param:ident : $type:ident) => { | |
$param | |
} | |
case ($param:ident) => { | |
$param | |
} | |
case ($param:ident : $type:ident, $rest ...) => { | |
$param, asmfn_params($rest ...) | |
} | |
case ($param:ident, $rest ...) => { | |
$param, asmfn_params($rest ...) | |
} | |
} | |
macro asmfn_convparams { | |
case ($param:ident : $type:ident) => { | |
$param = asmfn_type($param, $type); | |
} | |
case ($param:ident) => { | |
; | |
} | |
case ($param:ident : $type:ident, $rest ...) => { | |
asmfn_convparams($param : $type) asmfn_convparams($rest ...) | |
} | |
case ($param:ident, $rest ...) => { | |
asmfn_convparams($rest ...) | |
} | |
} | |
macro asmfn_type { | |
case ($param, int) => { | |
$param|0 | |
} | |
case ($param, double) => { | |
+$param | |
} | |
} | |
asmfn calc(a: int, b: int, c, d: double, msg) { | |
var res = (a + b) / d; | |
if (c) { | |
res *= 2; | |
} | |
if (res > 0x7fffffff) { | |
console.log(msg); | |
} | |
return (res + 10); | |
} | |
// function calc(a, b, c, d, msg) { | |
// 'use asm'; | |
// a = a | 0; | |
// b = b | 0; | |
// d = +d; | |
// ; | |
// var res = (a + b) / d; | |
// if (c) { | |
// res *= 2; | |
// } | |
// if (res > 2147483647) { | |
// console.log(msg); | |
// } | |
// return res + 10; | |
// } |
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