[6a3a178] | 1 | import { write, read } from "@xtuc/ieee754";
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| 2 | /**
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| 3 | * According to https://webassembly.github.io/spec/binary/values.html#binary-float
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| 4 | * n = 32/8
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| 5 | */
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| 6 |
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| 7 | export var NUMBER_OF_BYTE_F32 = 4;
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| 8 | /**
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| 9 | * According to https://webassembly.github.io/spec/binary/values.html#binary-float
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| 10 | * n = 64/8
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| 11 | */
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| 12 |
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| 13 | export var NUMBER_OF_BYTE_F64 = 8;
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| 14 | export var SINGLE_PRECISION_MANTISSA = 23;
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| 15 | export var DOUBLE_PRECISION_MANTISSA = 52;
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| 16 | export function encodeF32(v) {
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| 17 | var buffer = [];
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| 18 | write(buffer, v, 0, true, SINGLE_PRECISION_MANTISSA, NUMBER_OF_BYTE_F32);
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| 19 | return buffer;
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| 20 | }
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| 21 | export function encodeF64(v) {
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| 22 | var buffer = [];
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| 23 | write(buffer, v, 0, true, DOUBLE_PRECISION_MANTISSA, NUMBER_OF_BYTE_F64);
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| 24 | return buffer;
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| 25 | }
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| 26 | export function decodeF32(bytes) {
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| 27 | var buffer = Buffer.from(bytes);
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| 28 | return read(buffer, 0, true, SINGLE_PRECISION_MANTISSA, NUMBER_OF_BYTE_F32);
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| 29 | }
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| 30 | export function decodeF64(bytes) {
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| 31 | var buffer = Buffer.from(bytes);
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| 32 | return read(buffer, 0, true, DOUBLE_PRECISION_MANTISSA, NUMBER_OF_BYTE_F64);
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| 33 | } |
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