diff options
Diffstat (limited to 'gcc/doc/invoke.texi')
| -rw-r--r-- | gcc/doc/invoke.texi | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index b1e6d5d..c26d183 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -7366,9 +7366,12 @@ in ordinary CPU registers instead. @opindex mno-fancy-math-387 Some 387 emulators do not support the @code{sin}, @code{cos} and @code{sqrt} instructions for the 387. Specify this option to avoid -generating those instructions. This option is the default on FreeBSD@. -As of revision 2.6.1, these instructions are not generated unless you -also use the @option{-funsafe-math-optimizations} switch. +generating those instructions. This option is the default on FreeBSD, +OpenBSD and NetBSD@. This option is overridden when @option{-march} +indicates that the target cpu will always have an FPU and so the +instruction will not need emulation. As of revision 2.6.1, these +instructions are not generated unless you also use the +@option{-funsafe-math-optimizations} switch. @item -malign-double @itemx -mno-align-double |