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33 lines
1000 B
33 lines
1000 B
import { write, read } from "@xtuc/ieee754"; |
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/** |
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* According to https://webassembly.github.io/spec/binary/values.html#binary-float |
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* n = 32/8 |
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*/ |
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export var NUMBER_OF_BYTE_F32 = 4; |
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/** |
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* According to https://webassembly.github.io/spec/binary/values.html#binary-float |
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* n = 64/8 |
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*/ |
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export var NUMBER_OF_BYTE_F64 = 8; |
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export var SINGLE_PRECISION_MANTISSA = 23; |
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export var DOUBLE_PRECISION_MANTISSA = 52; |
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export function encodeF32(v) { |
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var buffer = []; |
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write(buffer, v, 0, true, SINGLE_PRECISION_MANTISSA, NUMBER_OF_BYTE_F32); |
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return buffer; |
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} |
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export function encodeF64(v) { |
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var buffer = []; |
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write(buffer, v, 0, true, DOUBLE_PRECISION_MANTISSA, NUMBER_OF_BYTE_F64); |
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return buffer; |
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} |
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export function decodeF32(bytes) { |
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var buffer = Buffer.from(bytes); |
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return read(buffer, 0, true, SINGLE_PRECISION_MANTISSA, NUMBER_OF_BYTE_F32); |
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} |
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export function decodeF64(bytes) { |
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var buffer = Buffer.from(bytes); |
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return read(buffer, 0, true, DOUBLE_PRECISION_MANTISSA, NUMBER_OF_BYTE_F64); |
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} |