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| author | bors <bors@rust-lang.org> | 2023-12-09 06:34:35 +0000 |
|---|---|---|
| committer | bors <bors@rust-lang.org> | 2023-12-09 06:34:35 +0000 |
| commit | aa7afff8c619fc9c04515b7cef57d72dc3c7e51e (patch) | |
| tree | 068bfacc8fa23c7b63860366ab60617980a0e98e /tests/rustdoc-js-std/osstring-to-string.js | |
| parent | 57935c35aac3f389eb406ac5d33b7953daeba7d1 (diff) | |
| parent | d57125632e78474e2623697fd77b5762df5b5454 (diff) | |
| download | rust-aa7afff8c619fc9c04515b7cef57d72dc3c7e51e.tar.gz rust-aa7afff8c619fc9c04515b7cef57d72dc3c7e51e.zip | |
Auto merge of #3216 - eduardosm:fix-ptestnzc, r=RalfJung
Fix x86 SSE4.1 ptestnzc Fixes ptestnzc by bringing back the original implementation of https://github.com/rust-lang/miri/pull/3214. `(op & mask) != 0 && (op & mask) == !ask` need to be calculated for the whole vector. It cannot be calculated for each element and then folded. For example, given * `op = [0b100, 0b010]` * `mask = [0b100, 0b110]` The correct result would be: * `op & mask = [0b100, 0b010]` Comparisons are done on the vector as a whole: * `all_zero = (op & mask) == [0, 0] = false` * `masked_set = (op & mask) == mask = false` * `!all_zero && !masked_set = true` correct result The previous method: * `op & mask = [0b100, 0b010]` Comparisons are done element-wise: * `all_zero = (op & mask) == [0, 0] = [true, true]` * `masked_set = (op & mask) == mask = [true, false]` * `!all_zero && !masked_set = [true, false]` After folding with AND, the final result would be `false`, which is incorrect.
Diffstat (limited to 'tests/rustdoc-js-std/osstring-to-string.js')
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