Copied from Debian.

From: Dave Martin
Subject: "rsc" doesnt exist anymore in thumb2

diff --git a/fixed.h b/fixed.h
index 4b58abf..ba4bc26 100644
--- a/fixed.h
+++ b/fixed.h
@@ -275,12 +275,25 @@ mad_fixed_t mad_f_mul_inline(mad_fixed_t x, mad_fixed_t y)
 	 : "+r" (lo), "+r" (hi)  \
 	 : "%r" (x), "r" (y))
 
+#ifdef __thumb__
+/* In Thumb-2, the RSB-immediate instruction is only allowed with a zero
+	operand.  If needed this code can also support Thumb-1 
+	(simply append "s" to the end of the second two instructions). */
+#  define MAD_F_MLN(hi, lo)  \
+    asm ("rsbs        %0, %0, #0\n\t"  \
+	 "sbc   %1, %1, %1\n\t"  \
+	 "sub   %1, %1, %2"  \
+	 : "+&r" (lo), "=&r" (hi)  \
+	 : "r" (hi)  \
+	 : "cc")
+#else /* ! __thumb__ */
 #  define MAD_F_MLN(hi, lo)  \
     asm ("rsbs	%0, %2, #0\n\t"  \
 	 "rsc	%1, %3, #0"  \
-	 : "=r" (lo), "=r" (hi)  \
+	 : "=&r" (lo), "=r" (hi)  \
 	 : "0" (lo), "1" (hi)  \
 	 : "cc")
+#endif /* __thumb__ */
 
 #  define mad_f_scale64(hi, lo)  \
     ({ mad_fixed_t __result;  \
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<tr><td><span title='2024-05-13 16:31:35 +0200'>2024-05-13</span></td><td><a href='/guix/commit/tests/guix-download.sh?id=723d45866f11b1aceb23d9d3d66c395ea9bf257b'>tests: Remove interference from the user’s Git config.</a><span class='msg-avail'>...<span class='msg-tooltip'>* tests/guix-download.sh: Set ‘GIT_CONFIG_GLOBAL’ and
‘GIT_CONFIG_SYSTEM’.

Reported-by: Ashvith Shetty &lt;ashvithshetty10@gmail.com&gt;
Change-Id: Ibe14d23db2e8af58b85c78248997c6dde78e11e0
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2024-01-22 10:02:28 -0500'>2024-01-22</span></td><td><a href='/guix/commit/tests/guix-download.sh?id=916fb5347ab8d441e92ec6bfb13f9e9fef524ff7'>guix: download: Add support for git repositories.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/scripts/download.scm (git-download-to-store*): Add new variable.
(copy-recursively-without-dot-git): New variable.
(git-download-to-file): Add new variable.
(show-help): Add 'git', 'commit', 'branch' and 'recursive'options
help message.
(%default-options): Add default value for 'git-reference' and
'recursive' options.
(%options): Add 'git', 'commit', 'branch' and 'recursive' command
line options.
(guix-download) [hash]: Compute hash with 'file-hash*' instead of
'port-hash' from (gcrypt hash) module. This allows us to compute
hashes for directories.
* doc/guix.texi (Invoking guix-download): Add @item entries for
`git', `commit', `branch' and `recursive' options. Add a paragraph in
the introduction.
* tests/guix-download.sh: New tests. Move variables and trap definition
to the top of the file.

Change-Id: Ic2c428dca4cfcb0d4714ed361a4c46609339140a
Signed-off-by: Maxim Cournoyer &lt;maxim.cournoyer@gmail.com&gt;
Reviewed-by: Maxim Cournoyer &lt;maxim.cournoyer@gmail.com&gt;
</span></span></td><td>Romain GARBAGE</td></tr>
<tr><td><span title='2023-04-21 16:16:38 +0200'>2023-04-21</span></td><td><a href='/guix/commit/tests/guix-download.sh?id=37dd69b44511dc73eb04bdebe8d82c9a0386338e'>tests: Fix checks for expected failures.</a><span class='msg-avail'>...<span class='msg-tooltip'>Addresses &lt;https://issues.guix.gnu.org/62406&gt;.

With 'set -e', a return status inverted with '!' does not cause the shell to
exit immediately.  Instead use '&amp;&amp; false' to indicate an expected failure.

* tests/guix-archive.sh, tests/guix-build-branch.sh, tests/guix-build.sh,
tests/guix-daemon.sh, tests/guix-download.sh,
tests/guix-environment-container.sh, tests/guix-environment.sh,
tests/guix-gc.sh, tests/guix-git-authenticate.sh, tests/guix-graph.sh,
tests/guix-hash.sh, tests/guix-home.sh, tests/guix-pack-relocatable.sh,
tests/guix-pack.sh, tests/guix-package-aliases.sh, tests/guix-package-net.sh,
tests/guix-package.sh, tests/guix-refresh.sh, tests/guix-shell.sh,
tests/guix-style.sh, tests/guix-system.sh: Replace uses of '! ...' with
'... &amp;&amp; false' or `test ! ...` as appropriate.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Eric Bavier</td></tr>