Pushed to r14-9736. 在 2024/3/30 下午3:58, Lulu Cheng 写道:
Add descriptions for the compilation options '-mfrecipe' '-mdiv32' '-mlam-bh' '-mlamcas' and '-mld-seq-sa'.gcc/ChangeLog: * doc/invoke.texi: Add descriptions for the compilation options. --- gcc/doc/invoke.texi | 45 +++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 43 insertions(+), 2 deletions(-) diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index c584664e168..942103c23f5 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -1058,8 +1058,9 @@ Objective-C and Objective-C++ Dialects}. -mmax-inline-memcpy-size=@var{n} -mexplicit-relocs=@var{style} -mexplicit-relocs -mno-explicit-relocs -mdirect-extern-access -mno-direct-extern-access --mcmodel=@var{code-model} -mrelax -mpass-mrelax-to-as} --mrecip -mrecip=@var{opt} +-mcmodel=@var{code-model} -mrelax -mpass-mrelax-to-as +-mrecip -mrecip=@var{opt} -mfrecipe -mno-frecipe -mdiv32 -mno-div32 +-mlam-bh -mno-lam-bh -mlamcas -mno-lamcas -mld-seq-sa -mno-ld-seq-sa}@emph{M32R/D Options}@gccoptlist{-m32r2 -m32rx -m32r @@ -27095,6 +27096,46 @@ Enable the approximation for vectorized reciprocal square root. So, for example, @option{-mrecip=all,!sqrt} enables all of the reciprocal approximations, except for scalar square root.+@opindex mfrecipe+@opindex mno-frecipe +@item -mfrecipe +@itemx -mno-frecipe +Use (do not use) @code{frecipe.@{s/d@}} and @code{frsqrte.@{s/d@}} +instructions. When build with @option{-march=la664}, it is enabled by default. +The default is @option{-mno-frecipe}. + +@opindex mdiv32 +@opindex mno-div32 +@item -mdiv32 +@itemx -mno-div32 +Use (do not use) @code{div.w[u]} and @code{mod.w[u]} instructions with input +not sign-extended. When build with @option{-march=la664}, it is enabled by +default. The default is @option{-mno-div32}. + +@opindex mlam-bh +@opindex mno-lam-bh +@item -mlam-bh +@itemx -mno-lam-bh +Use (do not use) @code{am@{swap/add@}[_db].@{b/h@}} instructions. When build +with @option{-march=la664}, it is enabled by default. The default is +@option{-mno-lam-bh}. + +@opindex mlamcas +@opindex mno-lamcas +@item -mlamcas +@itemx -mno-lamcas +Use (do not use) @code{amcas[_db].@{b/h/w/d@}} instructions. When build with +@option{-march=la664}, it is enabled by default. The default is +@option{-mno-lamcas}. + +@opindex mld-seq-sa +@opindex mno-ld-seq-sa +@item -mld-seq-sa +@itemx -mno-ld-seq-sa +Whether a load-load barrier (@code{dbar 0x700}) is needed. When build with +@option{-march=la664}, it is enabled by default. The default is +@option{-mno-ld-seq-sa}, the load-load barrier is needed. + @item loongarch-vect-unroll-limit The vectorizer will use available tuning information to determine whether it would be beneficial to unroll the main vectorized loop and by how much. This
