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Diffstat (limited to 'gcc/doc/install.texi')
| -rw-r--r-- | gcc/doc/install.texi | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/gcc/doc/install.texi b/gcc/doc/install.texi index e05cbed..9e5ba5e 100644 --- a/gcc/doc/install.texi +++ b/gcc/doc/install.texi @@ -1221,6 +1221,24 @@ ISA for floating-point arithmetics. You can select either @samp{sse} which enables @option{-msse2} or @samp{avx} which enables @option{-mavx} by default. This option is only supported on i386 and x86-64 targets. +@item --with-nan=@var{encoding} +On MIPS targets, set the default encoding convention to use for the +special not-a-number (NaN) IEEE 754 floating-point data. The +possibilities for @var{encoding} are: +@table @code +@item legacy +Use the legacy encoding, as with the @option{-mnan=legacy} command-line +option. +@item 2008 +Use the 754-2008 encoding, as with the @option{-mnan=2008} command-line +option. +@end table +To use this configuration option you must have an assembler version +installed that supports the @option{-mnan=} command-line option too. +In the absence of this configuration option the default convention is +the legacy encoding, as when neither of the @option{-mnan=2008} and +@option{-mnan=legacy} command-line options has been used. + @item --with-divide=@var{type} Specify how the compiler should generate code for checking for division by zero. This option is only supported on the MIPS target. |