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| author | Uros Bizjak <uros@gcc.gnu.org> | 2008-01-09 08:35:49 +0100 |
|---|---|---|
| committer | Uros Bizjak <uros@gcc.gnu.org> | 2008-01-09 08:35:49 +0100 |
| commit | b73d1527638e04c540069f78196224d1f00234c4 (patch) | |
| tree | 0272e85ef3cad8c8278347ac043d3125ee0b5c11 | |
| parent | 876e92ef8c0b6e5a5ff7a9ba3df3f479d895b190 (diff) | |
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invoke.texi (i386 and x86-64 Options): Two small spell fixes.
* doc/invoke.texi (i386 and x86-64 Options) [mrecip]:
Two small spell fixes.
From-SVN: r131414
| -rw-r--r-- | gcc/doc/invoke.texi | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index b48ba2e..5c63161 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -10647,14 +10647,14 @@ or @code{remainder} built-in functions: see @ref{Other Builtins} for details. @item -mrecip @opindex mrecip This option will enable GCC to use RCPSS and RSQRTSS instructions (and their -vectorized variants RCPPS and RSQRTPS) with additional Newton-Rhapson step +vectorized variants RCPPS and RSQRTPS) with an additional Newton-Rhapson step to increase precision instead of DIVSS and SQRTSS (and their vectorized variants) for single precision floating point arguments. These instructions are generated only when @option{-funsafe-math-optimizations} is enabled together with @option{-finite-math-only} and @option{-fno-trapping-math}. Note that while the throughput of the sequence is higher than the throughput of the non-reciprocal instruction, the precision of the sequence can be -decreased up to 2 ulp (i.e. the inverse of 1.0 equals 0.99999994). +decreased by up to 2 ulp (i.e. the inverse of 1.0 equals 0.99999994). @item -mveclibabi=@var{type} @opindex mveclibabi |