Add is_ascii function optimized for LoongArch64 for [u8]
#146699
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Similar to x86_64, on LoongArch64 we use the `vmskltz.b` instruction to test the high bit in a lane. For longer input cases, the performance improvement is significant. For unaligned cases close to 32 bytes in length, there's some regression, but it seems acceptable. | core benches (MB/s) | Before | After | % | |--------------------------------------------------------|--------|--------|---------| | ascii::is_ascii::short::case00_libcore | 1000 | 1000 | 0.00 | | ascii::is_ascii::medium::case00_libcore | 8000 | 8000 | 0.00 | | ascii::is_ascii::long::case00_libcore | 183947 | 436875 | +137.50 | | ascii::is_ascii::unaligned_head_medium::case00_libcore | 7750 | 2818 | -63.64 | | ascii::is_ascii::unaligned_head_long::case00_libcore | 317681 | 436812 | +37.50 | | ascii::is_ascii::unaligned_tail_medium::case00_libcore | 7750 | 3444 | -55.56 | | ascii::is_ascii::unaligned_tail_long::case00_libcore | 155311 | 436812 | +181.25 | | ascii::is_ascii::unaligned_both_medium::case00_libcore | 7500 | 3333 | -55.56 | | ascii::is_ascii::unaligned_both_long::case00_libcore | 174700 | 436750 | +150.00 |
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…crum Add `is_ascii` function optimized for LoongArch64 for [u8] Similar to x86_64, on LoongArch64 we use the `vmskltz.b` instruction to test the high bit in a lane. For longer input cases, the performance improvement is significant. For unaligned cases close to 32 bytes in length, there's some regression, but it seems acceptable. | core benches (MB/s) | Before | After | % | |--------------------------------------------------------|--------|--------|---------| | ascii::is_ascii::short::case00_libcore | 1000 | 1000 | 0.00 | | ascii::is_ascii::medium::case00_libcore | 8000 | 8000 | 0.00 | | ascii::is_ascii::long::case00_libcore | 183947 | 436875 | +137.50 | | ascii::is_ascii::unaligned_head_medium::case00_libcore | 7750 | 2818 | -63.64 | | ascii::is_ascii::unaligned_head_long::case00_libcore | 317681 | 436812 | +37.50 | | ascii::is_ascii::unaligned_tail_medium::case00_libcore | 7750 | 3444 | -55.56 | | ascii::is_ascii::unaligned_tail_long::case00_libcore | 155311 | 436812 | +181.25 | | ascii::is_ascii::unaligned_both_medium::case00_libcore | 7500 | 3333 | -55.56 | | ascii::is_ascii::unaligned_both_long::case00_libcore | 174700 | 436750 | +150.00 |
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Rollup of 7 pull requests Successful merges: - #146573 (Constify Range functions) - #146699 (Add `is_ascii` function optimized for LoongArch64 for [u8]) - #148026 (std: don't leak the thread closure if destroying the thread attributes fails) - #148135 (Ignore unix socket related tests for VxWorks) - #148211 (clippy fixes and code simplification) - #148395 (Generalize branch references) - #148405 (Fix suggestion when there were a colon already in generics) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of #146699 - heiher:is-ascii-lsx, r=Mark-Simulacrum Add `is_ascii` function optimized for LoongArch64 for [u8] Similar to x86_64, on LoongArch64 we use the `vmskltz.b` instruction to test the high bit in a lane. For longer input cases, the performance improvement is significant. For unaligned cases close to 32 bytes in length, there's some regression, but it seems acceptable. | core benches (MB/s) | Before | After | % | |--------------------------------------------------------|--------|--------|---------| | ascii::is_ascii::short::case00_libcore | 1000 | 1000 | 0.00 | | ascii::is_ascii::medium::case00_libcore | 8000 | 8000 | 0.00 | | ascii::is_ascii::long::case00_libcore | 183947 | 436875 | +137.50 | | ascii::is_ascii::unaligned_head_medium::case00_libcore | 7750 | 2818 | -63.64 | | ascii::is_ascii::unaligned_head_long::case00_libcore | 317681 | 436812 | +37.50 | | ascii::is_ascii::unaligned_tail_medium::case00_libcore | 7750 | 3444 | -55.56 | | ascii::is_ascii::unaligned_tail_long::case00_libcore | 155311 | 436812 | +181.25 | | ascii::is_ascii::unaligned_both_medium::case00_libcore | 7500 | 3333 | -55.56 | | ascii::is_ascii::unaligned_both_long::case00_libcore | 174700 | 436750 | +150.00 |
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Rollup of 7 pull requests Successful merges: - rust-lang/rust#146573 (Constify Range functions) - rust-lang/rust#146699 (Add `is_ascii` function optimized for LoongArch64 for [u8]) - rust-lang/rust#148026 (std: don't leak the thread closure if destroying the thread attributes fails) - rust-lang/rust#148135 (Ignore unix socket related tests for VxWorks) - rust-lang/rust#148211 (clippy fixes and code simplification) - rust-lang/rust#148395 (Generalize branch references) - rust-lang/rust#148405 (Fix suggestion when there were a colon already in generics) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup of 7 pull requests Successful merges: - rust-lang/rust#146573 (Constify Range functions) - rust-lang/rust#146699 (Add `is_ascii` function optimized for LoongArch64 for [u8]) - rust-lang/rust#148026 (std: don't leak the thread closure if destroying the thread attributes fails) - rust-lang/rust#148135 (Ignore unix socket related tests for VxWorks) - rust-lang/rust#148211 (clippy fixes and code simplification) - rust-lang/rust#148395 (Generalize branch references) - rust-lang/rust#148405 (Fix suggestion when there were a colon already in generics) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup of 7 pull requests Successful merges: - rust-lang/rust#146573 (Constify Range functions) - rust-lang/rust#146699 (Add `is_ascii` function optimized for LoongArch64 for [u8]) - rust-lang/rust#148026 (std: don't leak the thread closure if destroying the thread attributes fails) - rust-lang/rust#148135 (Ignore unix socket related tests for VxWorks) - rust-lang/rust#148211 (clippy fixes and code simplification) - rust-lang/rust#148395 (Generalize branch references) - rust-lang/rust#148405 (Fix suggestion when there were a colon already in generics) r? `@ghost` `@rustbot` modify labels: rollup
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Similar to x86_64, on LoongArch64 we use the
vmskltz.binstruction to test the high bit in a lane.For longer input cases, the performance improvement is significant. For unaligned cases close to 32 bytes in length, there's some regression, but it seems acceptable.