128 lines
2.3 KiB
JavaScript
128 lines
2.3 KiB
JavaScript
'use strict';
|
|
|
|
|
|
var int_float_of_bits = (function(x){
|
|
return new Float32Array(new Int32Array([x]).buffer)[0]
|
|
});
|
|
|
|
var int_bits_of_float = (function(x){
|
|
return new Int32Array(new Float32Array([x]).buffer)[0]
|
|
});
|
|
|
|
function modf_float(x) {
|
|
if (!isFinite(x)) {
|
|
if (isNaN(x)) {
|
|
return [
|
|
NaN,
|
|
NaN
|
|
];
|
|
} else {
|
|
return [
|
|
1 / x,
|
|
x
|
|
];
|
|
}
|
|
}
|
|
var neg = 1 / x < 0;
|
|
var x$1 = Math.abs(x);
|
|
var i = Math.floor(x$1);
|
|
var f = x$1 - i;
|
|
if (neg) {
|
|
return [
|
|
-f,
|
|
-i
|
|
];
|
|
} else {
|
|
return [
|
|
f,
|
|
i
|
|
];
|
|
}
|
|
}
|
|
|
|
function ldexp_float(x, exp) {
|
|
var x$p = x;
|
|
var exp$p = exp;
|
|
if (exp$p > 1023) {
|
|
exp$p = exp$p - 1023;
|
|
x$p = x$p * Math.pow(2, 1023);
|
|
if (exp$p > 1023) {
|
|
exp$p = exp$p - 1023;
|
|
x$p = x$p * Math.pow(2, 1023);
|
|
}
|
|
|
|
} else if (exp$p < -1023) {
|
|
exp$p = exp$p + 1023;
|
|
x$p = x$p * Math.pow(2, -1023);
|
|
}
|
|
return x$p * Math.pow(2, exp$p);
|
|
}
|
|
|
|
function frexp_float(x) {
|
|
if (x === 0 || !isFinite(x)) {
|
|
return [
|
|
x,
|
|
0
|
|
];
|
|
}
|
|
var neg = x < 0;
|
|
var x$p = Math.abs(x);
|
|
var exp = Math.floor(Math.LOG2E * Math.log(x$p)) + 1;
|
|
x$p = x$p * Math.pow(2, -exp);
|
|
if (x$p < 0.5) {
|
|
x$p = x$p * 2;
|
|
exp = exp - 1;
|
|
}
|
|
if (neg) {
|
|
x$p = -x$p;
|
|
}
|
|
return [
|
|
x$p,
|
|
exp | 0
|
|
];
|
|
}
|
|
|
|
function copysign_float(x, y) {
|
|
var x$1 = Math.abs(x);
|
|
var y$1 = y === 0 ? 1 / y : y;
|
|
if (y$1 < 0) {
|
|
return -x$1;
|
|
} else {
|
|
return x$1;
|
|
}
|
|
}
|
|
|
|
function expm1_float(x) {
|
|
var y = Math.exp(x);
|
|
var z = y - 1;
|
|
if (Math.abs(x) > 1) {
|
|
return z;
|
|
} else if (z === 0) {
|
|
return x;
|
|
} else {
|
|
return x * z / Math.log(y);
|
|
}
|
|
}
|
|
|
|
function hypot_float(x, y) {
|
|
var x0 = Math.abs(x);
|
|
var y0 = Math.abs(y);
|
|
var a = x0 > y0 ? x0 : y0;
|
|
var b = (
|
|
x0 < y0 ? x0 : y0
|
|
) / (
|
|
a !== 0 ? a : 1
|
|
);
|
|
return a * Math.sqrt(1 + b * b);
|
|
}
|
|
|
|
exports.int_float_of_bits = int_float_of_bits;
|
|
exports.int_bits_of_float = int_bits_of_float;
|
|
exports.modf_float = modf_float;
|
|
exports.ldexp_float = ldexp_float;
|
|
exports.frexp_float = frexp_float;
|
|
exports.copysign_float = copysign_float;
|
|
exports.expm1_float = expm1_float;
|
|
exports.hypot_float = hypot_float;
|
|
/* No side effect */
|