add fe25519_mul32
This commit is contained in:
Christophe Diederichs
parent
c54ff9636e
commit
58947e04ce
@ -35,6 +35,7 @@ const importWithMemory = {
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}
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const wasm_mul = require('./fe25519_25/fe25519_mul')(importWithMemory)
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const wasm_mul32 = require('./fe25519_25/fe25519_mul32')()
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const wasm_sq = require('./fe25519_25/fe25519_sq')(importWithMemory)
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const wasm_invert = require('./fe25519_25/fe25519_invert')(importWithMemory)
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const wasm_pow = require('./fe25519_25/fe25519_pow22523')()
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@ -799,6 +800,22 @@ function fe25519_mul (h, f, g) {
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parse_fe(h, mem, 80)
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}
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function fe25519_mul32 (h, f, n) {
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check_fe(h)
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check_fe(f)
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// printFe(f, 'f')
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// printFe(g, 'g')
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var fbuf = new Uint8Array(f.buffer)
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wasm_mul32.memory.set(fbuf)
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wasm_mul32.exports.fe25519_mul32(40, 0, n)
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const output = Buffer.from(wasm_mul32.memory.slice(40, 80))
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parse_fe(h, output, 0)
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}
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/*
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h = f * f
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Can overlap h with f.
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61
fe25519_25/fe25519_mul32.js
Normal file
61
fe25519_25/fe25519_mul32.js
Normal file
@ -0,0 +1,61 @@
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module.exports = loadWebAssembly
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loadWebAssembly.supported = typeof WebAssembly !== 'undefined'
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function loadWebAssembly (opts) {
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if (!loadWebAssembly.supported) return null
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var imp = opts && opts.imports
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var wasm = toUint8Array('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')
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var ready = null
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var mod = {
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buffer: wasm,
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memory: null,
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exports: null,
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realloc: realloc,
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onload: onload
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}
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onload(function () {})
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return mod
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function realloc (size) {
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mod.exports.memory.grow(Math.max(0, Math.ceil(Math.abs(size - mod.memory.length) / 65536)))
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mod.memory = new Uint8Array(mod.exports.memory.buffer)
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}
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function onload (cb) {
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if (mod.exports) return cb()
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if (ready) {
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ready.then(cb.bind(null, null)).catch(cb)
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return
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}
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try {
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if (opts && opts.async) throw new Error('async')
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setup({instance: new WebAssembly.Instance(new WebAssembly.Module(wasm), imp)})
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} catch (err) {
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ready = WebAssembly.instantiate(wasm, imp).then(setup)
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}
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onload(cb)
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}
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function setup (w) {
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mod.exports = w.instance.exports
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mod.memory = mod.exports.memory && mod.exports.memory.buffer && new Uint8Array(mod.exports.memory.buffer)
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}
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}
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function toUint8Array (s) {
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if (typeof atob === 'function') return new Uint8Array(atob(s).split('').map(charCodeAt))
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return (require('buf' + 'fer').Buffer).from(s, 'base64')
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}
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function charCodeAt (c) {
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return c.charCodeAt(0)
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}
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161
fe25519_25/fe25519_mul32.wat
Normal file
161
fe25519_25/fe25519_mul32.wat
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@ -0,0 +1,161 @@
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(module
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(memory $0 1)
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(export "memory" (memory $0))
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;; (func $i32.log (import "debug" "log") (param i32))
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;; (func $i32.log_tee (import "debug" "log_tee") (param i32) (result i32))
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;; ;; No i64 interop with JS yet - but maybe coming with WebAssembly BigInt
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;; ;; So we can instead fake this by splitting the i64 into two i32 limbs,
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;; ;; however these are WASM functions using i32x2.log:
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;; (func $i32x2.log (import "debug" "log") (param i32) (param i32))
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;; (func $f32.log (import "debug" "log") (param f32))
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;; (func $f32.log_tee (import "debug" "log_tee") (param f32) (result f32))
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;; (func $f64.log (import "debug" "log") (param f64))
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;; (func $f64.log_tee (import "debug" "log_tee") (param f64) (result f64))
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;; ;; i64 logging by splitting into two i32 limbs
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;; (func $i64.log
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;; (param $0 i64)
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;; (call $i32x2.log
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;; ;; Upper limb
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;; (i32.wrap/i64
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;; (i64.shr_s (get_local $0)
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;; (i64.const 32)))
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;; ;; Lower limb
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;; (i32.wrap/i64 (get_local $0))))
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;; (func $i64.log_tee
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;; (param $0 i64)
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;; (result i64)
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;; (call $i64.log (get_local $0))
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;; (return (get_local $0)))
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(func $fe_mul32
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(param $f0 i64)
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(param $f1 i64)
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(param $f2 i64)
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(param $f3 i64)
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(param $f4 i64)
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(param $f5 i64)
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(param $f6 i64)
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(param $f7 i64)
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(param $f8 i64)
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(param $f9 i64)
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(param $n i32)
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(param $h i32)
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(local $sn i64)
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(local $h0 i64)
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(local $h1 i64)
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(local $h2 i64)
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(local $h3 i64)
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(local $h4 i64)
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(local $h5 i64)
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(local $h6 i64)
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(local $h7 i64)
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(local $h8 i64)
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(local $h9 i64)
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(local $carry0 i64)
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(local $carry1 i64)
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(local $carry2 i64)
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(local $carry3 i64)
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(local $carry4 i64)
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(local $carry5 i64)
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(local $carry6 i64)
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(local $carry7 i64)
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(local $carry8 i64)
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(local $carry9 i64)
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(set_local $sn (i64.extend_s/i32 (get_local $n)))
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(set_local $f0 (i64.extend_s/i32 (i32.wrap/i64 (get_local $f0))))
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(set_local $f1 (i64.extend_s/i32 (i32.wrap/i64 (get_local $f1))))
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(set_local $f2 (i64.extend_s/i32 (i32.wrap/i64 (get_local $f2))))
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(set_local $f3 (i64.extend_s/i32 (i32.wrap/i64 (get_local $f3))))
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(set_local $f4 (i64.extend_s/i32 (i32.wrap/i64 (get_local $f4))))
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(set_local $f5 (i64.extend_s/i32 (i32.wrap/i64 (get_local $f5))))
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(set_local $f6 (i64.extend_s/i32 (i32.wrap/i64 (get_local $f6))))
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(set_local $f7 (i64.extend_s/i32 (i32.wrap/i64 (get_local $f7))))
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(set_local $f8 (i64.extend_s/i32 (i32.wrap/i64 (get_local $f8))))
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(set_local $f9 (i64.extend_s/i32 (i32.wrap/i64 (get_local $f9))))
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(set_local $h0 (i64.mul (get_local $f0) (get_local $sn)))
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(set_local $h1 (i64.mul (get_local $f1) (get_local $sn)))
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(set_local $h2 (i64.mul (get_local $f2) (get_local $sn)))
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(set_local $h3 (i64.mul (get_local $f3) (get_local $sn)))
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(set_local $h4 (i64.mul (get_local $f4) (get_local $sn)))
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(set_local $h5 (i64.mul (get_local $f5) (get_local $sn)))
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(set_local $h6 (i64.mul (get_local $f6) (get_local $sn)))
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(set_local $h7 (i64.mul (get_local $f7) (get_local $sn)))
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(set_local $h8 (i64.mul (get_local $f8) (get_local $sn)))
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(set_local $h9 (i64.mul (get_local $f9) (get_local $sn)))
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(set_local $carry9 (i64.shr_s (i64.add (get_local $h9) (i64.shl (i64.const 1) (i64.const 24))) (i64.const 25)))
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(set_local $h0 (i64.add (get_local $h0) (i64.mul (get_local $carry9) (i64.const 19))))
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(set_local $h9 (i64.sub (get_local $h9) (i64.mul (get_local $carry9) (i64.shl (i64.const 1) (i64.const 25)))))
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(set_local $carry1 (i64.shr_s (i64.add (get_local $h1) (i64.shl (i64.const 1) (i64.const 24))) (i64.const 25)))
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(set_local $h2 (i64.add (get_local $h2) (get_local $carry1)))
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(set_local $h1 (i64.sub (get_local $h1) (i64.mul (get_local $carry1) (i64.shl (i64.const 1) (i64.const 25)))))
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(set_local $carry3 (i64.shr_s (i64.add (get_local $h3) (i64.shl (i64.const 1) (i64.const 24))) (i64.const 25)))
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(set_local $h4 (i64.add (get_local $h4) (get_local $carry3)))
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(set_local $h3 (i64.sub (get_local $h3) (i64.mul (get_local $carry3) (i64.shl (i64.const 1) (i64.const 25)))))
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(set_local $carry5 (i64.shr_s (i64.add (get_local $h5) (i64.shl (i64.const 1) (i64.const 24))) (i64.const 25)))
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(set_local $h6 (i64.add (get_local $h6) (get_local $carry5)))
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(set_local $h5 (i64.sub (get_local $h5) (i64.mul (get_local $carry5) (i64.shl (i64.const 1) (i64.const 25)))))
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(set_local $carry7 (i64.shr_s (i64.add (get_local $h7) (i64.shl (i64.const 1) (i64.const 24))) (i64.const 25)))
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(set_local $h8 (i64.add (get_local $h8) (get_local $carry7)))
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(set_local $h7 (i64.sub (get_local $h7) (i64.mul (get_local $carry7) (i64.shl (i64.const 1) (i64.const 25)))))
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(set_local $carry0 (i64.shr_s (i64.add (get_local $h0) (i64.shl (i64.const 1) (i64.const 25))) (i64.const 26)))
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(set_local $h1 (i64.add (get_local $h1) (get_local $carry0)))
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(set_local $h0 (i64.sub (get_local $h0) (i64.mul (get_local $carry0) (i64.shl (i64.const 1) (i64.const 26)))))
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(set_local $carry2 (i64.shr_s (i64.add (get_local $h2) (i64.shl (i64.const 1) (i64.const 25))) (i64.const 26)))
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(set_local $h3 (i64.add (get_local $h3) (get_local $carry2)))
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(set_local $h2 (i64.sub (get_local $h2) (i64.mul (get_local $carry2) (i64.shl (i64.const 1) (i64.const 26)))))
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(set_local $carry4 (i64.shr_s (i64.add (get_local $h4) (i64.shl (i64.const 1) (i64.const 25))) (i64.const 26)))
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(set_local $h5 (i64.add (get_local $h5) (get_local $carry4)))
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(set_local $h4 (i64.sub (get_local $h4) (i64.mul (get_local $carry4) (i64.shl (i64.const 1) (i64.const 26)))))
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(set_local $carry6 (i64.shr_s (i64.add (get_local $h6) (i64.shl (i64.const 1) (i64.const 25))) (i64.const 26)))
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(set_local $h7 (i64.add (get_local $h7) (get_local $carry6)))
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(set_local $h6 (i64.sub (get_local $h6) (i64.mul (get_local $carry6) (i64.shl (i64.const 1) (i64.const 26)))))
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(set_local $carry8 (i64.shr_s (i64.add (get_local $h8) (i64.shl (i64.const 1) (i64.const 25))) (i64.const 26)))
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(set_local $h9 (i64.add (get_local $h9) (get_local $carry8)))
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(set_local $h8 (i64.sub (get_local $h8) (i64.mul (get_local $carry8) (i64.shl (i64.const 1) (i64.const 26)))))
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(i64.store32 offset=0 (get_local $h) (get_local $h0))
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(i64.store32 offset=4 (get_local $h) (get_local $h1))
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(i64.store32 offset=8 (get_local $h) (get_local $h2))
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(i64.store32 offset=12 (get_local $h) (get_local $h3))
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(i64.store32 offset=16 (get_local $h) (get_local $h4))
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(i64.store32 offset=20 (get_local $h) (get_local $h5))
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(i64.store32 offset=24 (get_local $h) (get_local $h6))
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(i64.store32 offset=28 (get_local $h) (get_local $h7))
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(i64.store32 offset=32 (get_local $h) (get_local $h8))
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(i64.store32 offset=36 (get_local $h) (get_local $h9)))
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(func $fe25519_mul32 (export "fe25519_mul32") (param $h i32) (param $f i32) (param $n i32)
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(i64.load32_u offset=0 (get_local $f))
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(i64.load32_u offset=4 (get_local $f))
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(i64.load32_u offset=8 (get_local $f))
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(i64.load32_u offset=12 (get_local $f))
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(i64.load32_u offset=16 (get_local $f))
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(i64.load32_u offset=20 (get_local $f))
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(i64.load32_u offset=24 (get_local $f))
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(i64.load32_u offset=28 (get_local $f))
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(i64.load32_u offset=32 (get_local $f))
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(i64.load32_u offset=36 (get_local $f))
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(get_local $n)
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(get_local $h)
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(call $fe_mul32)))
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