84 lines
2.9 KiB
Diff
84 lines
2.9 KiB
Diff
From 899f1f351ddc0d76bc9d432cfe63b30cfb294860 Mon Sep 17 00:00:00 2001
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From: Lulu Cheng <chenglulu@loongson.cn>
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Date: Fri, 25 Oct 2024 06:22:11 +0000
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Subject: [PATCH 156/188] LoongArch: Add descriptions of the compilation
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options.
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Add descriptions for the compilation options '-mfrecipe' '-mdiv32'
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'-mlam-bh' '-mlamcas' and '-mld-seq-sa'.
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gcc/ChangeLog:
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* doc/invoke.texi: Add descriptions for the compilation
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options.
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---
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gcc/doc/invoke.texi | 45 +++++++++++++++++++++++++++++++++++++++++++--
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1 file changed, 43 insertions(+), 2 deletions(-)
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diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
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index 5c6515cb1..7f24fe1e2 100644
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--- a/gcc/doc/invoke.texi
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+++ b/gcc/doc/invoke.texi
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@@ -1008,8 +1008,9 @@ Objective-C and Objective-C++ Dialects}.
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-mmax-inline-memcpy-size=@var{n} @gol
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-mexplicit-relocs -mno-explicit-relocs @gol
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-mdirect-extern-access -mno-direct-extern-access @gol
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--mcmodel=@var{code-model} -mrelax -mpass-mrelax-to-as} @gol
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--mrecip -mrecip=@var{opt}
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+-mcmodel=@var{code-model} -mrelax -mpass-mrelax-to-as @gol
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+-mrecip -mrecip=@var{opt} -mfrecipe -mno-frecipe -mdiv32 -mno-div32 @gol
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+-mlam-bh -mno-lam-bh -mlamcas -mno-lamcas -mld-seq-sa -mno-ld-seq-sa}
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@emph{M32R/D Options}
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@gccoptlist{-m32r2 -m32rx -m32r @gol
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@@ -24686,6 +24687,46 @@ Enable the approximation for vectorized reciprocal square root.
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So, for example, @option{-mrecip=all,!sqrt} enables
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all of the reciprocal approximations, except for scalar square root.
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+@opindex mfrecipe
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+@opindex mno-frecipe
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+@item -mfrecipe
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+@itemx -mno-frecipe
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+Use (do not use) @code{frecipe.@{s/d@}} and @code{frsqrte.@{s/d@}}
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+instructions. When build with @option{-march=la664}, it is enabled by default.
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+The default is @option{-mno-frecipe}.
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+
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+@opindex mdiv32
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+@opindex mno-div32
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+@item -mdiv32
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+@itemx -mno-div32
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+Use (do not use) @code{div.w[u]} and @code{mod.w[u]} instructions with input
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+not sign-extended. When build with @option{-march=la664}, it is enabled by
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+default. The default is @option{-mno-div32}.
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+
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+@opindex mlam-bh
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+@opindex mno-lam-bh
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+@item -mlam-bh
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+@itemx -mno-lam-bh
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+Use (do not use) @code{am@{swap/add@}[_db].@{b/h@}} instructions. When build
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+with @option{-march=la664}, it is enabled by default. The default is
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+@option{-mno-lam-bh}.
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+
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+@opindex mlamcas
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+@opindex mno-lamcas
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+@item -mlamcas
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+@itemx -mno-lamcas
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+Use (do not use) @code{amcas[_db].@{b/h/w/d@}} instructions. When build with
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+@option{-march=la664}, it is enabled by default. The default is
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+@option{-mno-lamcas}.
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+
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+@opindex mld-seq-sa
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+@opindex mno-ld-seq-sa
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+@item -mld-seq-sa
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+@itemx -mno-ld-seq-sa
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+Whether a load-load barrier (@code{dbar 0x700}) is needed. When build with
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+@option{-march=la664}, it is enabled by default. The default is
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+@option{-mno-ld-seq-sa}, the load-load barrier is needed.
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+
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@item loongarch-vect-unroll-limit
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The vectorizer will use available tuning information to determine whether it
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would be beneficial to unroll the main vectorized loop and by how much. This
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--
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2.43.0
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