From: Xi Ruoyao <xry111@xry111.site>
Date: Wed, 21 May 2025 07:05:27 +0000 (+0800)
Subject: doc: Document the 'q' constraint for LoongArch
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9c621efd2c54879fe4e42eb4c48b11a38931e105;p=thirdparty%2Fgcc.git

doc: Document the 'q' constraint for LoongArch

The kernel developers have requested such a constraint to use csrxchg
in inline assembly.

gcc/ChangeLog:

	* doc/md.texi: Document the 'q' constraint for LoongArch.
---

diff --git a/gcc/doc/md.texi b/gcc/doc/md.texi
index 1a1c1b73089..2a1f9919c5b 100644
--- a/gcc/doc/md.texi
+++ b/gcc/doc/md.texi
@@ -2918,6 +2918,9 @@ A signed 16-bit constant.
 A memory operand whose address is formed by a base register and offset
 that is suitable for use in instructions with the same addressing mode
 as @code{st.w} and @code{ld.w}.
+@item q
+A general-purpose register except for $r0 and $r1 (for the csrxchg
+instruction)
 @item I
 A signed 12-bit constant (for arithmetic instructions).
 @item K