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High word mask for excluding the sign bit of a double-precision floating-point number.
import FLOAT64_HIGH_WORD_ABS_MASK from 'https://cdn.jsdelivr.net/gh/stdlib-js/constants-float64-high-word-abs-mask@esm/index.mjs';High word mask for excluding the sign bit of a double-precision floating-point number.
// 0x7fffffff = 2147483647 => 0 11111111111 11111111111111111111
var bool = ( FLOAT64_HIGH_WORD_ABS_MASK === 0x7fffffff );
// returns true- The higher order word of a double-precision floating-point number is a 32-bit integer containing the more significant bits which include the exponent and sign.
<!DOCTYPE html>
<html lang="en">
<body>
<script type="module">
import getHighWord from 'https://cdn.jsdelivr.net/gh/stdlib-js/number-float64-base-get-high-word@esm/index.mjs';
import getLowWord from 'https://cdn.jsdelivr.net/gh/stdlib-js/number-float64-base-get-low-word@esm/index.mjs';
import fromWords from 'https://cdn.jsdelivr.net/gh/stdlib-js/number-float64-base-from-words@esm/index.mjs';
import FLOAT64_HIGH_WORD_ABS_MASK from 'https://cdn.jsdelivr.net/gh/stdlib-js/constants-float64-high-word-abs-mask@esm/index.mjs';
var x = -11.5;
var hi = getHighWord( x ); // 1 10000000010 01110000000000000000
// returns 3223781376
// Turn off the sign bit and leave other bits unchanged:
var out = hi & FLOAT64_HIGH_WORD_ABS_MASK; // 0 10000000010 01110000000000000000
// returns 1076297728
// Generate a new value:
out = fromWords( out, getLowWord( x ) );
// returns 11.5
</script>
</body>
</html>@stdlib/constants-float64/high-word-sign-mask: high word mask for the sign bit of a double-precision floating-point number.@stdlib/constants-float64/high-word-exponent-mask: high word mask for the exponent of a double-precision floating-point number.@stdlib/constants-float64/high-word-significand-mask: high word mask for the significand of a double-precision floating-point number.
This package is part of stdlib, a standard library with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.
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