diff options
Diffstat (limited to 'gcc/doc/invoke.texi')
| -rw-r--r-- | gcc/doc/invoke.texi | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 7413abd..f916b50 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -627,7 +627,7 @@ Objective-C and Objective-C++ Dialects}. -msingle-float -mdouble-float -mdsp -mno-dsp -mdspr2 -mno-dspr2 @gol -msmartmips -mno-smartmips @gol -mpaired-single -mno-paired-single -mdmx -mno-mdmx @gol --mips3d -mno-mips3d -mmt -mno-mt @gol +-mips3d -mno-mips3d -mmt -mno-mt -mllsc -mno-llsc @gol -mlong64 -mlong32 -msym32 -mno-sym32 @gol -G@var{num} -mlocal-sdata -mno-local-sdata @gol -mextern-sdata -mno-extern-sdata -mgpopt -mno-gopt @gol @@ -11772,6 +11772,22 @@ operations. Assume that the floating-point coprocessor supports double-precision operations. This is the default. +@item -mllsc +@itemx -mno-llsc +@opindex mllsc +@opindex mno-llsc +Use (do not use) @samp{ll}, @samp{sc}, and @samp{sync} instructions to +implement atomic memory built-in functions. When neither option is +specified, GCC will use the instructions if the target architecture +supports them. + +@option{-mllsc} is useful if the runtime environment can emulate the +instructions and @option{-mno-llsc} can be useful when compiling for +nonstandard ISAs. You can make either option the default by +configuring GCC with @option{--with-llsc} and @option{--without-llsc} +respectively. @option{--with-llsc} is the default for some +configurations; see the installation documentation for details. + @item -mdsp @itemx -mno-dsp @opindex mdsp |