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| author | Sandra Loosemore <sloosemore@baylibre.com> | 2025-03-07 17:08:30 +0000 |
|---|---|---|
| committer | Sandra Loosemore <sloosemore@baylibre.com> | 2025-03-07 17:16:06 +0000 |
| commit | c781da2c10641a651019f8fe77f57ccdbc49f024 (patch) | |
| tree | ed09ff87d6b28f1e4101f14c1c8afe6caa4f0041 | |
| parent | 7deb498425799aceb7659ea25614175a49533184 (diff) | |
| download | gcc-c781da2c10641a651019f8fe77f57ccdbc49f024.zip gcc-c781da2c10641a651019f8fe77f57ccdbc49f024.tar.gz gcc-c781da2c10641a651019f8fe77f57ccdbc49f024.tar.bz2 | |
x86: Improve documentation for -msse4 [PR116708]
gcc/ChangeLog
PR target/116708
* doc/invoke.texi (x86 Options): Clarify how -msse4 and -mno-sse4
interact with other SSE options.
| -rw-r--r-- | gcc/doc/invoke.texi | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index d955802..c61f351 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -35924,6 +35924,11 @@ These extensions are also available as built-in functions: see @ref{x86 Built-in Functions}, for details of the functions enabled and disabled by these switches. +Note that @option{-msse4} enables both SSE4.1 and SSE4.2 support, +while @option{-mno-sse4} turns off those features; neither form of the +option affects SSE4A support, controlled separately by +@option{-msse4a}. + To generate SSE/SSE2 instructions automatically from floating-point code (as opposed to 387 instructions), see @option{-mfpmath=sse}. |