mirror of
https://github.com/fluencelabs/assemblyscript
synced 2025-04-28 08:22:15 +00:00
Add lightweight paths for memcpy & memset for shrink level != 0 (#601)
This commit is contained in:
Max Graey
Daniel Wirtz
parent
af00bdeefe
commit
7cd04b65ef
@ -1,154 +1,163 @@
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// export function memcpy(dest: usize, src: usize, n: usize): void { // see: musl/src/string/memcpy.c
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export function memcpy(dest: usize, src: usize, n: usize): void { // see: musl/src/string/memcpy.c
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// var w: u32, x: u32;
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if (ASC_SHRINK_LEVEL > 1) {
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while (n) {
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store<u8>(dest++, load<u8>(src++));
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--n;
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}
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} else {
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let w: u32, x: u32;
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// // copy 1 byte each until src is aligned to 4 bytes
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// copy 1 byte each until src is aligned to 4 bytes
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// while (n && (src & 3)) {
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while (n && (src & 3)) {
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// n--;
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n--;
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// }
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}
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// // if dst is aligned to 4 bytes as well, copy 4 bytes each
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// if dst is aligned to 4 bytes as well, copy 4 bytes each
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// if ((dest & 3) == 0) {
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if ((dest & 3) == 0) {
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// while (n >= 16) {
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while (n >= 16) {
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// store<u32>(dest , load<u32>(src ));
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store<u32>(dest , load<u32>(src ));
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// store<u32>(dest + 4, load<u32>(src + 4));
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store<u32>(dest + 4, load<u32>(src + 4));
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// store<u32>(dest + 8, load<u32>(src + 8));
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store<u32>(dest + 8, load<u32>(src + 8));
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// store<u32>(dest + 12, load<u32>(src + 12));
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store<u32>(dest + 12, load<u32>(src + 12));
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// src += 16; dest += 16; n -= 16;
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src += 16; dest += 16; n -= 16;
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// }
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}
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// if (n & 8) {
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if (n & 8) {
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// store<u32>(dest , load<u32>(src ));
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store<u32>(dest , load<u32>(src ));
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// store<u32>(dest + 4, load<u32>(src + 4));
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store<u32>(dest + 4, load<u32>(src + 4));
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// dest += 8; src += 8;
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dest += 8; src += 8;
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// }
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}
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// if (n & 4) {
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if (n & 4) {
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// store<u32>(dest, load<u32>(src));
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store<u32>(dest, load<u32>(src));
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// dest += 4; src += 4;
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dest += 4; src += 4;
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// }
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}
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// if (n & 2) { // drop to 2 bytes each
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if (n & 2) { // drop to 2 bytes each
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// store<u16>(dest, load<u16>(src));
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store<u16>(dest, load<u16>(src));
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// dest += 2; src += 2;
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dest += 2; src += 2;
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// }
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}
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// if (n & 1) { // drop to 1 byte
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if (n & 1) { // drop to 1 byte
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// }
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}
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// return;
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return;
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// }
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}
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// // if dst is not aligned to 4 bytes, use alternating shifts to copy 4 bytes each
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// if dst is not aligned to 4 bytes, use alternating shifts to copy 4 bytes each
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// // doing shifts if faster when copying enough bytes (here: 32 or more)
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// doing shifts if faster when copying enough bytes (here: 32 or more)
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// if (n >= 32) {
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if (n >= 32) {
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// switch (dest & 3) {
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switch (dest & 3) {
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// // known to be != 0
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// known to be != 0
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// case 1: {
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case 1: {
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// w = load<u32>(src);
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w = load<u32>(src);
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// n -= 3;
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n -= 3;
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// while (n >= 17) {
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while (n >= 17) {
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// x = load<u32>(src + 1);
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x = load<u32>(src + 1);
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// store<u32>(dest, w >> 24 | x << 8);
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store<u32>(dest, w >> 24 | x << 8);
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// w = load<u32>(src + 5);
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w = load<u32>(src + 5);
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// store<u32>(dest + 4, x >> 24 | w << 8);
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store<u32>(dest + 4, x >> 24 | w << 8);
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// x = load<u32>(src + 9);
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x = load<u32>(src + 9);
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// store<u32>(dest + 8, w >> 24 | x << 8);
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store<u32>(dest + 8, w >> 24 | x << 8);
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// w = load<u32>(src + 13);
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w = load<u32>(src + 13);
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// store<u32>(dest + 12, x >> 24 | w << 8);
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store<u32>(dest + 12, x >> 24 | w << 8);
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// src += 16; dest += 16; n -= 16;
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src += 16; dest += 16; n -= 16;
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// }
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}
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// break;
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break;
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// }
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}
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// case 2: {
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case 2: {
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// w = load<u32>(src);
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w = load<u32>(src);
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// n -= 2;
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n -= 2;
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// while (n >= 18) {
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while (n >= 18) {
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// x = load<u32>(src + 2);
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x = load<u32>(src + 2);
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// store<u32>(dest, w >> 16 | x << 16);
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store<u32>(dest, w >> 16 | x << 16);
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// w = load<u32>(src + 6);
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w = load<u32>(src + 6);
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// store<u32>(dest + 4, x >> 16 | w << 16);
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store<u32>(dest + 4, x >> 16 | w << 16);
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// x = load<u32>(src + 10);
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x = load<u32>(src + 10);
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// store<u32>(dest + 8, w >> 16 | x << 16);
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store<u32>(dest + 8, w >> 16 | x << 16);
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// w = load<u32>(src + 14);
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w = load<u32>(src + 14);
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// store<u32>(dest + 12, x >> 16 | w << 16);
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store<u32>(dest + 12, x >> 16 | w << 16);
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// src += 16; dest += 16; n -= 16;
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src += 16; dest += 16; n -= 16;
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// }
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}
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// break;
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break;
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// }
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}
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// case 3: {
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case 3: {
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// w = load<u32>(src);
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w = load<u32>(src);
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// n -= 1;
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n -= 1;
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// while (n >= 19) {
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while (n >= 19) {
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// x = load<u32>(src + 3);
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x = load<u32>(src + 3);
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// store<u32>(dest, w >> 8 | x << 24);
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store<u32>(dest, w >> 8 | x << 24);
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// w = load<u32>(src + 7);
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w = load<u32>(src + 7);
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// store<u32>(dest + 4, x >> 8 | w << 24);
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store<u32>(dest + 4, x >> 8 | w << 24);
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// x = load<u32>(src + 11);
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x = load<u32>(src + 11);
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// store<u32>(dest + 8, w >> 8 | x << 24);
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store<u32>(dest + 8, w >> 8 | x << 24);
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// w = load<u32>(src + 15);
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w = load<u32>(src + 15);
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// store<u32>(dest + 12, x >> 8 | w << 24);
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store<u32>(dest + 12, x >> 8 | w << 24);
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// src += 16; dest += 16; n -= 16;
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src += 16; dest += 16; n -= 16;
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// }
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}
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// break;
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break;
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// }
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}
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// }
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}
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// }
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}
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// // copy remaining bytes one by one
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// copy remaining bytes one by one
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// if (n & 16) {
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if (n & 16) {
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// }
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}
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// if (n & 8) {
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if (n & 8) {
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// }
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}
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// if (n & 4) {
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if (n & 4) {
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// }
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}
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// if (n & 2) {
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if (n & 2) {
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// }
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}
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// if (n & 1) {
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if (n & 1) {
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// store<u8>(dest++, load<u8>(src++));
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store<u8>(dest++, load<u8>(src++));
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// }
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}
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// }
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}
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}
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// @ts-ignore: decorator
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// @ts-ignore: decorator
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@inline
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@inline
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export function memmove(dest: usize, src: usize, n: usize): void { // see: musl/src/string/memmove.c
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export function memmove(dest: usize, src: usize, n: usize): void { // see: musl/src/string/memmove.c
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if (dest === src) return;
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if (dest === src) return;
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// if (src + n <= dest || dest + n <= src) {
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if (ASC_SHRINK_LEVEL < 1) {
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// memcpy(dest, src, n);
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if (src + n <= dest || dest + n <= src) {
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// return;
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memcpy(dest, src, n);
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// }
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return;
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}
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}
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if (dest < src) {
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if (dest < src) {
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if ((src & 7) == (dest & 7)) {
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if ((src & 7) == (dest & 7)) {
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while (dest & 7) {
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while (dest & 7) {
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@ -187,7 +196,12 @@ export function memmove(dest: usize, src: usize, n: usize): void { // see: musl/
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// @ts-ignore: decorator
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// @ts-ignore: decorator
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@inline
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@inline
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export function memset(dest: usize, c: u8, n: usize): void { // see: musl/src/string/memset
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export function memset(dest: usize, c: u8, n: usize): void { // see: musl/src/string/memset
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if (ASC_SHRINK_LEVEL > 1) {
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while (n) {
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store<u8>(dest++, c);
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--n;
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}
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} else {
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// fill head and tail with minimal branching
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// fill head and tail with minimal branching
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if (!n) return;
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if (!n) return;
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store<u8>(dest, c);
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store<u8>(dest, c);
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@ -204,12 +218,12 @@ export function memset(dest: usize, c: u8, n: usize): void { // see: musl/src/st
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if (n <= 8) return;
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if (n <= 8) return;
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// advance pointer to align it at 4-byte boundary
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// advance pointer to align it at 4-byte boundary
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var k: usize = -dest & 3;
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let k: usize = -dest & 3;
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dest += k;
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dest += k;
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n -= k;
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n -= k;
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n &= -4;
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n &= -4;
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var c32: u32 = <u32>-1 / 255 * c;
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let c32: u32 = <u32>-1 / 255 * c;
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// fill head/tail up to 28 bytes each in preparation
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// fill head/tail up to 28 bytes each in preparation
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store<u32>(dest, c32);
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store<u32>(dest, c32);
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@ -235,7 +249,7 @@ export function memset(dest: usize, c: u8, n: usize): void { // see: musl/src/st
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n -= k;
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n -= k;
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// copy 32 bytes each
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// copy 32 bytes each
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var c64: u64 = <u64>c32 | (<u64>c32 << 32);
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let c64: u64 = <u64>c32 | (<u64>c32 << 32);
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while (n >= 32) {
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while (n >= 32) {
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store<u64>(dest, c64);
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store<u64>(dest, c64);
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store<u64>(dest + 8, c64);
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store<u64>(dest + 8, c64);
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@ -244,6 +258,7 @@ export function memset(dest: usize, c: u8, n: usize): void { // see: musl/src/st
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n -= 32;
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n -= 32;
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dest += 32;
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dest += 32;
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}
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}
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}
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}
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}
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// @ts-ignore: decorator
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// @ts-ignore: decorator
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File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
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