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