diff options
Diffstat (limited to 'gcc/invoke.texi')
| -rw-r--r-- | gcc/invoke.texi | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/gcc/invoke.texi b/gcc/invoke.texi index 4d37992..c8cdb1a 100644 --- a/gcc/invoke.texi +++ b/gcc/invoke.texi @@ -446,7 +446,8 @@ in the following sections. -malign-jumps=@var{num} -malign-loops=@var{num} -malign-functions=@var{num} -mpreferred-stack-boundary=@var{num} -mthreads -mno-align-stringops -minline-all-stringops --mpush-args -maccumulate-outgoing-args +-mpush-args -maccumulate-outgoing-args -m128bit-long-double +-m96bit-long-double @emph{HPPA Options} -march=@var{architecture type} @@ -6344,9 +6345,22 @@ boundary. Aligning @code{double} variables on a two word boundary will produce code that runs somewhat faster on a @samp{Pentium} at the expense of more memory. -@strong{Warning:} if you use the @samp{-malign-double} switch, -structures containing the above types will be aligned differently than -the published application binary interface specifications for the 386. +@item -m128bit-long-double +@itemx -m128bit-long-double +Control the size of @code{long double} type. i386 application binary interface +specify the size to be 12 bytes, while modern architectures (Pentium and newer) +preffer @code{long double} aligned to 8 or 16 byte boundary. This is +impossible to reach with 12 byte long doubles in the array accesses. + +@strong{Warning:} if you use the @samp{-m128bit-long-double} switch, the +structures and arrays containing @code{long double} will change their size as +well as function calling convention for function taking @code{long double} +will be modified. + +@item -m96bit-long-double +@itemx -m96bit-long-double +Set the size of @code{long double} to 96 bytes as requires by the i386 +application binary interface. This is the default. @item -msvr3-shlib @itemx -mno-svr3-shlib |