stdlib-js
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About stdlib...
</summary>
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From Words
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Create a [double-precision floating-point number][ieee754] from a higher order word and a lower order word.
bash
npm install @stdlib/number-float64-base-from-words
javascript
var fromWords = require( '@stdlib/number-float64-base-from-words' );
#### fromWords( high, low )
Creates a [double-precision floating-point number][ieee754] from a higher order word (unsigned 32-bit integer) and a lower order word (unsigned 32-bit integer).
javascript
var v = fromWords( 1774486211, 2479577218 );
// returns 3.14e201
v = fromWords( 3221823995, 1413754136 );
// returns -3.141592653589793
v = fromWords( 0, 0 );
// returns 0.0
v = fromWords( 2147483648, 0 );
// returns -0.0
v = fromWords( 2146959360, 0 );
// returns NaN
v = fromWords( 2146435072, 0 );
// returns Infinity
v = fromWords( 4293918720, 0 );
// returns -Infinity
javascript
var randu = require( '@stdlib/random-base-randu' );
var round = require( '@stdlib/math-base-special-round' );
var MAX_UINT32 = require( '@stdlib/constants-uint32-max' );
var fromWords = require( '@stdlib/number-float64-base-from-words' );
var high;
var low;
var x;
var i;
for ( i = 0; i < 100; i++ ) {
high = round( randu()*MAX_UINT32 );
low = round( randu()*MAX_UINT32 );
x = fromWords( high, low );
console.log( 'higher: %d. lower: %d. float: %d.', high, low, x );
}
c
#include "stdlib/number/float64/base/from_words.h"
#### stdlib_base_float64_from_words( high, low, *x )
Creates a double-precision floating-point number from a higher order word and a lower order word.
c
#include <stdint.h>
uint32_t high = 1074339512;
uint32_t low = 1374389535;
double x;
stdlib_base_float64_from_words( high, low, &x );
The function accepts the following arguments:
- high: [in] uint32_t higher order word.
- low: [in] uint32_t lower order word.
- x: [out] double* destination for a double-precision floating-point number.
c
void stdlib_base_float64_from_words( const uint32_t high, const uint32_t low, double *x );
c
#include "stdlib/number/float64/base/from_words.h"
#include <stdint.h>
#include <stdio.h>
int main( void ) {
uint32_t high = 1074339512;
uint32_t low[] = { 0, 10000, 1000000, 1374389535 };
double x;
int i;
for ( i = 0; i < 4; i++ ) {
stdlib_base_float64_from_words( high, low[ i ], &x );
printf( "high: %u, low: %u => %lf\n", high, low[ i ], x );
}
}
@stdlib/number-float32/base/from-word][@stdlib/number/float32/base/from-word]: create a single-precision floating-point number from an unsigned integer corresponding to an IEEE 754 binary representation.
