mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
80 lines
2.2 KiB
Plaintext
80 lines
2.2 KiB
Plaintext
/*
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This file is part of solidity.
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solidity is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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solidity is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with solidity. If not, see <http://www.gnu.org/licenses/>.
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*/
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// SPDX-License-Identifier: GPL-3.0
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// NOTE: This file is used to generate `ewasmPolyfills/Conversion.h`.
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function u256_to_u128(x1, x2, x3, x4) -> v1, v2 {
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if i64.ne(0, i64.or(x1, x2)) { invalid() }
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v2 := x4
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v1 := x3
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}
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function u256_to_i64(x1, x2, x3, x4) -> v {
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if i64.ne(0, i64.or(i64.or(x1, x2), x3)) { invalid() }
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v := x4
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}
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function u256_to_i32(x1, x2, x3, x4) -> v:i32 {
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if i64.ne(0, i64.or(i64.or(x1, x2), x3)) { invalid() }
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if i64.ne(0, i64.shr_u(x4, 32)) { invalid() }
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v := i32.wrap_i64(x4)
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}
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function u256_to_byte(x1, x2, x3, x4) -> v {
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if i64.ne(0, i64.or(i64.or(x1, x2), x3)) { invalid() }
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if i64.gt_u(x4, 255) { invalid() }
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v := x4
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}
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function u256_to_i32ptr(x1, x2, x3, x4) -> v:i32 {
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v := u256_to_i32(x1, x2, x3, x4)
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}
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function to_internal_i32ptr(x1, x2, x3, x4) -> r:i32 {
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let p:i32 := u256_to_i32ptr(x1, x2, x3, x4)
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r := i32.add(p, 64:i32)
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if i32.lt_u(r, p) { invalid() }
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}
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function u256_to_address(x1, x2, x3, x4) -> r1, r2, r3 {
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if i64.ne(0, x1) { invalid() }
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if i64.ne(0, i64.shr_u(x2, 32)) { invalid() }
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r1 := x2
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r2 := x3
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r3 := x4
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}
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function bswap16(x:i32) -> y:i32 {
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let hi:i32 := i32.and(i32.shl(x, 8:i32), 0xff00:i32)
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let lo:i32 := i32.and(i32.shr_u(x, 8:i32), 0xff:i32)
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y := i32.or(hi, lo)
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}
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function bswap32(x:i32) -> y:i32 {
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let hi:i32 := i32.shl(bswap16(x), 16:i32)
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let lo:i32 := bswap16(i32.shr_u(x, 16:i32))
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y := i32.or(hi, lo)
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}
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function bswap64(x) -> y {
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let hi := i64.shl(i64.extend_i32_u(bswap32(i32.wrap_i64(x))), 32)
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let lo := i64.extend_i32_u(bswap32(i32.wrap_i64(i64.shr_u(x, 32))))
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y := i64.or(hi, lo)
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}
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