README.md (7637B)
1 <!-- 2 3 @license Apache-2.0 4 5 Copyright (c) 2018 The Stdlib Authors. 6 7 Licensed under the Apache License, Version 2.0 (the "License"); 8 you may not use this file except in compliance with the License. 9 You may obtain a copy of the License at 10 11 http://www.apache.org/licenses/LICENSE-2.0 12 13 Unless required by applicable law or agreed to in writing, software 14 distributed under the License is distributed on an "AS IS" BASIS, 15 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 16 See the License for the specific language governing permissions and 17 limitations under the License. 18 19 --> 20 21 # Float64 22 23 > Base utilities for double-precision floating-point numbers. 24 25 <section class="usage"> 26 27 ## Usage 28 29 ```javascript 30 var ns = require( '@stdlib/number/float64/base' ); 31 ``` 32 33 #### ns 34 35 Base utilities for double-precision floating-point numbers. 36 37 ```javascript 38 var o = ns; 39 // returns {...} 40 ``` 41 42 <!-- <toc pattern="*"> --> 43 44 <div class="namespace-toc"> 45 46 - <span class="signature">[`exponent( x )`][@stdlib/number/float64/base/exponent]</span><span class="delimiter">: </span><span class="description">return an integer corresponding to the unbiased exponent of a double-precision floating-point number.</span> 47 - <span class="signature">[`fromBinaryString( bstr )`][@stdlib/number/float64/base/from-binary-string]</span><span class="delimiter">: </span><span class="description">create a double-precision floating-point number from a literal bit representation.</span> 48 - <span class="signature">[`fromInt64Bytes( bytes, stride, offset )`][@stdlib/number/float64/base/from-int64-bytes]</span><span class="delimiter">: </span><span class="description">convert a signed 64-bit integer byte array to a double-precision floating-point number.</span> 49 - <span class="signature">[`fromWords( high, low )`][@stdlib/number/float64/base/from-words]</span><span class="delimiter">: </span><span class="description">create a double-precision floating-point number from a higher order word and a lower order word.</span> 50 - <span class="signature">[`getHighWord( x )`][@stdlib/number/float64/base/get-high-word]</span><span class="delimiter">: </span><span class="description">return an unsigned 32-bit integer corresponding to the more significant 32 bits of a double-precision floating-point number.</span> 51 - <span class="signature">[`getLowWord( x )`][@stdlib/number/float64/base/get-low-word]</span><span class="delimiter">: </span><span class="description">return an unsigned 32-bit integer corresponding to the less significant 32 bits of a double-precision floating-point number.</span> 52 - <span class="signature">[`normalize( [out,] x )`][@stdlib/number/float64/base/normalize]</span><span class="delimiter">: </span><span class="description">return a normal number `y` and exponent `exp` satisfying `x = y * 2^exp`.</span> 53 - <span class="signature">[`setHighWord( x, high )`][@stdlib/number/float64/base/set-high-word]</span><span class="delimiter">: </span><span class="description">set the more significant 32 bits of a double-precision floating-point number.</span> 54 - <span class="signature">[`setLowWord( x, low )`][@stdlib/number/float64/base/set-low-word]</span><span class="delimiter">: </span><span class="description">set the less significant 32 bits of a double-precision floating-point number.</span> 55 - <span class="signature">[`signbit( x )`][@stdlib/number/float64/base/signbit]</span><span class="delimiter">: </span><span class="description">return a boolean indicating if the sign bit for a double-precision floating-point number is on (true) or off (false).</span> 56 - <span class="signature">[`toBinaryString( x )`][@stdlib/number/float64/base/to-binary-string]</span><span class="delimiter">: </span><span class="description">return a string giving the literal bit representation of a double-precision floating-point number.</span> 57 - <span class="signature">[`float64ToFloat32( x )`][@stdlib/number/float64/base/to-float32]</span><span class="delimiter">: </span><span class="description">convert a double-precision floating-point number to the nearest single-precision floating-point number.</span> 58 - <span class="signature">[`float64ToInt32( x )`][@stdlib/number/float64/base/to-int32]</span><span class="delimiter">: </span><span class="description">convert a double-precision floating-point number to a signed 32-bit integer.</span> 59 - <span class="signature">[`float64ToInt64Bytes( x )`][@stdlib/number/float64/base/to-int64-bytes]</span><span class="delimiter">: </span><span class="description">convert an integer-valued double-precision floating-point number to a signed 64-bit integer byte array according to host byte order (endianness).</span> 60 - <span class="signature">[`float64ToUint32( x )`][@stdlib/number/float64/base/to-uint32]</span><span class="delimiter">: </span><span class="description">convert a double-precision floating-point number to an unsigned 32-bit integer.</span> 61 - <span class="signature">[`toWords( [out,] x )`][@stdlib/number/float64/base/to-words]</span><span class="delimiter">: </span><span class="description">split a double-precision floating-point number into a higher order word and a lower order word.</span> 62 63 </div> 64 65 <!-- </toc> --> 66 67 </section> 68 69 <!-- /.usage --> 70 71 <section class="examples"> 72 73 ## Examples 74 75 <!-- TODO: better examples --> 76 77 <!-- eslint no-undef: "error" --> 78 79 ```javascript 80 var objectKeys = require( '@stdlib/utils/keys' ); 81 var ns = require( '@stdlib/number/float64/base' ); 82 83 console.log( objectKeys( ns ) ); 84 ``` 85 86 </section> 87 88 <!-- /.examples --> 89 90 <section class="links"> 91 92 <!-- <toc-links> --> 93 94 [@stdlib/number/float64/base/exponent]: https://www.npmjs.com/package/@stdlib/number/tree/main/float64/base/exponent 95 96 [@stdlib/number/float64/base/from-binary-string]: https://www.npmjs.com/package/@stdlib/number/tree/main/float64/base/from-binary-string 97 98 [@stdlib/number/float64/base/from-int64-bytes]: https://www.npmjs.com/package/@stdlib/number/tree/main/float64/base/from-int64-bytes 99 100 [@stdlib/number/float64/base/from-words]: https://www.npmjs.com/package/@stdlib/number/tree/main/float64/base/from-words 101 102 [@stdlib/number/float64/base/get-high-word]: https://www.npmjs.com/package/@stdlib/number/tree/main/float64/base/get-high-word 103 104 [@stdlib/number/float64/base/get-low-word]: https://www.npmjs.com/package/@stdlib/number/tree/main/float64/base/get-low-word 105 106 [@stdlib/number/float64/base/normalize]: https://www.npmjs.com/package/@stdlib/number/tree/main/float64/base/normalize 107 108 [@stdlib/number/float64/base/set-high-word]: https://www.npmjs.com/package/@stdlib/number/tree/main/float64/base/set-high-word 109 110 [@stdlib/number/float64/base/set-low-word]: https://www.npmjs.com/package/@stdlib/number/tree/main/float64/base/set-low-word 111 112 [@stdlib/number/float64/base/signbit]: https://www.npmjs.com/package/@stdlib/number/tree/main/float64/base/signbit 113 114 [@stdlib/number/float64/base/to-binary-string]: https://www.npmjs.com/package/@stdlib/number/tree/main/float64/base/to-binary-string 115 116 [@stdlib/number/float64/base/to-float32]: https://www.npmjs.com/package/@stdlib/number/tree/main/float64/base/to-float32 117 118 [@stdlib/number/float64/base/to-int32]: https://www.npmjs.com/package/@stdlib/number/tree/main/float64/base/to-int32 119 120 [@stdlib/number/float64/base/to-int64-bytes]: https://www.npmjs.com/package/@stdlib/number/tree/main/float64/base/to-int64-bytes 121 122 [@stdlib/number/float64/base/to-uint32]: https://www.npmjs.com/package/@stdlib/number/tree/main/float64/base/to-uint32 123 124 [@stdlib/number/float64/base/to-words]: https://www.npmjs.com/package/@stdlib/number/tree/main/float64/base/to-words 125 126 <!-- </toc-links> --> 127 128 </section> 129 130 <!-- /.links -->