solidity/libyul/backends/wasm/polyfill/Bitwise.yul

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/*
This file is part of solidity.
solidity is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
solidity is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with solidity. If not, see <http://www.gnu.org/licenses/>.
*/
// SPDX-License-Identifier: GPL-3.0
// NOTE: This file is used to generate `ewasmPolyfills/Bitwise.h`.
function bit_negate(x) -> y {
y := i64.xor(x, 0xffffffffffffffff)
}
function split(x) -> hi, lo {
hi := i64.shr_u(x, 32)
lo := i64.and(x, 0xffffffff)
}
function shl_internal(amount, x1, x2, x3, x4) -> r1, r2, r3, r4 {
// amount < 64
r1 := i64.add(i64.shl(x1, amount), i64.shr_u(x2, i64.sub(64, amount)))
r2 := i64.add(i64.shl(x2, amount), i64.shr_u(x3, i64.sub(64, amount)))
r3 := i64.add(i64.shl(x3, amount), i64.shr_u(x4, i64.sub(64, amount)))
r4 := i64.shl(x4, amount)
}
function shr_internal(amount, x1, x2, x3, x4) -> r1, r2, r3, r4 {
// amount < 64
r4 := i64.add(i64.shr_u(x4, amount), i64.shl(x3, i64.sub(64, amount)))
r3 := i64.add(i64.shr_u(x3, amount), i64.shl(x2, i64.sub(64, amount)))
r2 := i64.add(i64.shr_u(x2, amount), i64.shl(x1, i64.sub(64, amount)))
r1 := i64.shr_u(x1, amount)
}
function shl320_internal(amount, x1, x2, x3, x4, x5) -> r1, r2, r3, r4, r5 {
// amount < 64
r1 := i64.add(i64.shl(x1, amount), i64.shr_u(x2, i64.sub(64, amount)))
r2 := i64.add(i64.shl(x2, amount), i64.shr_u(x3, i64.sub(64, amount)))
r3 := i64.add(i64.shl(x3, amount), i64.shr_u(x4, i64.sub(64, amount)))
r4 := i64.add(i64.shl(x4, amount), i64.shr_u(x5, i64.sub(64, amount)))
r5 := i64.shl(x5, 1)
}
function shr320_internal(amount, x1, x2, x3, x4, x5) -> r1, r2, r3, r4, r5 {
// amount < 64
r5 := i64.add(i64.shr_u(x5, amount), i64.shl(x4, i64.sub(64, amount)))
r4 := i64.add(i64.shr_u(x4, amount), i64.shl(x3, i64.sub(64, amount)))
r3 := i64.add(i64.shr_u(x3, amount), i64.shl(x2, i64.sub(64, amount)))
r2 := i64.add(i64.shr_u(x2, amount), i64.shl(x1, i64.sub(64, amount)))
r1 := i64.shr_u(x1, 1)
}
function shl512_internal(amount, x1, x2, x3, x4, x5, x6, x7, x8) -> r1, r2, r3, r4, r5, r6, r7, r8 {
// amount < 64
r1 := i64.add(i64.shl(x1, amount), i64.shr_u(x2, i64.sub(64, amount)))
r2 := i64.add(i64.shl(x2, amount), i64.shr_u(x3, i64.sub(64, amount)))
r3 := i64.add(i64.shl(x3, amount), i64.shr_u(x4, i64.sub(64, amount)))
r4 := i64.add(i64.shl(x4, amount), i64.shr_u(x5, i64.sub(64, amount)))
r5 := i64.add(i64.shl(x5, amount), i64.shr_u(x6, i64.sub(64, amount)))
r6 := i64.add(i64.shl(x6, amount), i64.shr_u(x7, i64.sub(64, amount)))
r7 := i64.add(i64.shl(x7, amount), i64.shr_u(x8, i64.sub(64, amount)))
r8 := i64.shl(x8, amount)
}
function shr512_internal(amount, x1, x2, x3, x4, x5, x6, x7, x8) -> r1, r2, r3, r4, r5, r6, r7, r8 {
// amount < 64
r8 := i64.add(i64.shr_u(x8, amount), i64.shl(x7, i64.sub(64, amount)))
r7 := i64.add(i64.shr_u(x7, amount), i64.shl(x6, i64.sub(64, amount)))
r6 := i64.add(i64.shr_u(x6, amount), i64.shl(x5, i64.sub(64, amount)))
r5 := i64.add(i64.shr_u(x5, amount), i64.shl(x4, i64.sub(64, amount)))
r4 := i64.add(i64.shr_u(x4, amount), i64.shl(x3, i64.sub(64, amount)))
r3 := i64.add(i64.shr_u(x3, amount), i64.shl(x2, i64.sub(64, amount)))
r2 := i64.add(i64.shr_u(x2, amount), i64.shl(x1, i64.sub(64, amount)))
r1 := i64.shr_u(x1, amount)
}
function byte(x1, x2, x3, x4, y1, y2, y3, y4) -> r1, r2, r3, r4 {
if i64.eqz(i64.or(i64.or(x1, x2), x3)) {
let component
switch i64.div_u(x4, 8)
case 0 { component := y1 }
case 1 { component := y2 }
case 2 { component := y3 }
case 3 { component := y4 }
x4 := i64.mul(i64.rem_u(x4, 8), 8)
r4 := i64.shr_u(component, i64.sub(56, x4))
r4 := i64.and(0xff, r4)
}
}
function xor(x1, x2, x3, x4, y1, y2, y3, y4) -> r1, r2, r3, r4 {
r1 := i64.xor(x1, y1)
r2 := i64.xor(x2, y2)
r3 := i64.xor(x3, y3)
r4 := i64.xor(x4, y4)
}
function or(x1, x2, x3, x4, y1, y2, y3, y4) -> r1, r2, r3, r4 {
r1 := i64.or(x1, y1)
r2 := i64.or(x2, y2)
r3 := i64.or(x3, y3)
r4 := i64.or(x4, y4)
}
function and(x1, x2, x3, x4, y1, y2, y3, y4) -> r1, r2, r3, r4 {
r1 := i64.and(x1, y1)
r2 := i64.and(x2, y2)
r3 := i64.and(x3, y3)
r4 := i64.and(x4, y4)
}
function not(x1, x2, x3, x4) -> r1, r2, r3, r4 {
let mask := 0xffffffffffffffff
r1, r2, r3, r4 := xor(x1, x2, x3, x4, mask, mask, mask, mask)
}
function shl_single(a, amount) -> x, y {
// amount < 64
x := i64.shr_u(a, i64.sub(64, amount))
y := i64.shl(a, amount)
}
function shl(x1, x2, x3, x4, y1, y2, y3, y4) -> z1, z2, z3, z4 {
if i32.and(i64.eqz(x1), i64.eqz(x2)) {
if i64.eqz(x3) {
if i64.lt_u(x4, 256) {
if i64.ge_u(x4, 128) {
y1 := y3
y2 := y4
y3 := 0
y4 := 0
x4 := i64.sub(x4, 128)
}
if i64.ge_u(x4, 64) {
y1 := y2
y2 := y3
y3 := y4
y4 := 0
x4 := i64.sub(x4, 64)
}
let t, r
t, z4 := shl_single(y4, x4)
r, z3 := shl_single(y3, x4)
z3 := i64.or(z3, t)
t, z2 := shl_single(y2, x4)
z2 := i64.or(z2, r)
r, z1 := shl_single(y1, x4)
z1 := i64.or(z1, t)
}
}
}
}
function shr_single(a, amount) -> x, y {
// amount < 64
y := i64.shl(a, i64.sub(64, amount))
x := i64.shr_u(a, amount)
}
function shr(x1, x2, x3, x4, y1, y2, y3, y4) -> z1, z2, z3, z4 {
if i32.and(i64.eqz(x1), i64.eqz(x2)) {
if i64.eqz(x3) {
if i64.lt_u(x4, 256) {
if i64.ge_u(x4, 128) {
y4 := y2
y3 := y1
y2 := 0
y1 := 0
x4 := i64.sub(x4, 128)
}
if i64.ge_u(x4, 64) {
y4 := y3
y3 := y2
y2 := y1
y1 := 0
x4 := i64.sub(x4, 64)
}
let t
z4, t := shr_single(y4, x4)
z3, t := shr_single(y3, x4)
z4 := i64.or(z4, t)
z2, t := shr_single(y2, x4)
z3 := i64.or(z3, t)
z1, t := shr_single(y1, x4)
z2 := i64.or(z2, t)
}
}
}
}
function sar(x1, x2, x3, x4, y1, y2, y3, y4) -> z1, z2, z3, z4 {
if i64.gt_u(i64.clz(y1), 0) {
z1, z2, z3, z4 := shr(x1, x2, x3, x4, y1, y2, y3, y4)
leave
}
if gte_256x256_64(x1, x2, x3, x4, 0, 0, 0, 256) {
z1 := 0xffffffffffffffff
z2 := 0xffffffffffffffff
z3 := 0xffffffffffffffff
z4 := 0xffffffffffffffff
}
if lt_256x256_64(x1, x2, x3, x4, 0, 0, 0, 256) {
y1, y2, y3, y4 := shr(0, 0, 0, x4, y1, y2, y3, y4)
z1, z2, z3, z4 := shl(
0, 0, 0, i64.sub(256, x4),
0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff
)
z1, z2, z3, z4 := or(y1, y2, y3, y4, z1, z2, z3, z4)
}
}