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| author | real-eren <erenalpkahriman@gmail.com> | 2025-02-02 17:59:43 -0500 |
|---|---|---|
| committer | real-eren <erenalpkahriman@gmail.com> | 2025-02-02 21:51:56 -0500 |
| commit | 3c7c38ad9335b043315addc1fcabf3631bbe1125 (patch) | |
| tree | 38a708d7983ae91086c75080239fb2514971ba37 | |
| parent | 613bdd49978298648ed05ace086bd1ecad54b44a (diff) | |
| download | rust-3c7c38ad9335b043315addc1fcabf3631bbe1125.tar.gz rust-3c7c38ad9335b043315addc1fcabf3631bbe1125.zip | |
Simplify SSE2 implementation
| -rw-r--r-- | compiler/rustc_span/src/analyze_source_file.rs | 24 |
1 files changed, 6 insertions, 18 deletions
diff --git a/compiler/rustc_span/src/analyze_source_file.rs b/compiler/rustc_span/src/analyze_source_file.rs index fba20566580..87c8e3fce07 100644 --- a/compiler/rustc_span/src/analyze_source_file.rs +++ b/compiler/rustc_span/src/analyze_source_file.rs @@ -110,25 +110,19 @@ cfg_match! { if control_char_mask != 0 { // Check for newlines in the chunk let newlines_test = unsafe { _mm_cmpeq_epi8(chunk, _mm_set1_epi8(b'\n' as i8)) }; - let newlines_mask = unsafe { _mm_movemask_epi8(newlines_test) }; + let mut newlines_mask = unsafe { _mm_movemask_epi8(newlines_test) }; if control_char_mask == newlines_mask { // All control characters are newlines, record them - let mut newlines_mask = 0xFFFF0000 | newlines_mask as u32; let output_offset = RelativeBytePos::from_usize(chunk_index * CHUNK_SIZE + 1); - loop { + while newlines_mask != 0 { let index = newlines_mask.trailing_zeros(); - if index >= CHUNK_SIZE as u32 { - // We have arrived at the end of the chunk. - break; - } - lines.push(RelativeBytePos(index) + output_offset); // Clear the bit, so we can find the next one. - newlines_mask &= (!1) << index; + newlines_mask &= newlines_mask - 1; } // We are done for this chunk. All control characters were @@ -268,25 +262,19 @@ cfg_match! { if control_char_mask != 0 { // Check for newlines in the chunk let newlines_test = unsafe { _mm_cmpeq_epi8(chunk, _mm_set1_epi8(b'\n' as i8)) }; - let newlines_mask = unsafe { _mm_movemask_epi8(newlines_test) }; + let mut newlines_mask = unsafe { _mm_movemask_epi8(newlines_test) }; if control_char_mask == newlines_mask { // All control characters are newlines, record them - let mut newlines_mask = 0xFFFF0000 | newlines_mask as u32; let output_offset = RelativeBytePos::from_usize(chunk_index * CHUNK_SIZE + 1); - loop { + while newlines_mask != 0 { let index = newlines_mask.trailing_zeros(); - if index >= CHUNK_SIZE as u32 { - // We have arrived at the end of the chunk. - break; - } - lines.push(RelativeBytePos(index) + output_offset); // Clear the bit, so we can find the next one. - newlines_mask &= (!1) << index; + newlines_mask &= newlines_mask - 1; } // We are done for this chunk. All control characters were |