Fix MIPS assembly code to work with newer GCC, where the "=h"
constraint is no longer supported.

--- libmad/fixed.h.orig	2004-02-16 21:02:03.000000000 -0500
+++ libmad/fixed.h	2011-10-29 18:47:21.000000000 -0400
@@ -304,8 +304,8 @@
  * significant bit depends on OPT_ACCURACY via mad_f_scale64().
  */
 #  define MAD_F_MLX(hi, lo, x, y)  \
-    asm ("mult	%2,%3"  \
-	 : "=l" (lo), "=h" (hi)  \
+    asm ("mult	%2,%3\n\tmfhi  %1"  \
+	 : "=l" (lo), "=r" (hi)  \
 	 : "%r" (x), "r" (y))
 
 # if defined(HAVE_MADD_ASM)
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<tr><th>author</th><td>Ricardo Wurmus &lt;rekado@elephly.net&gt;</td><td class='right'>2022-08-25 11:30:49 +0200</td></tr>
<tr><th>committer</th><td>Ricardo Wurmus &lt;rekado@elephly.net&gt;</td><td class='right'>2022-08-25 11:55:11 +0200</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/guix/commit/gnu/system/linux-initrd.scm?id=dfa373069df55bb4eb6e13792336db8e0fb85d1d'>dfa373069df55bb4eb6e13792336db8e0fb85d1d</a> (<a href='/guix/patch/gnu/system/linux-initrd.scm?id=dfa373069df55bb4eb6e13792336db8e0fb85d1d'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/guix/tree/?id=dfa373069df55bb4eb6e13792336db8e0fb85d1d'>7178336ed7315fc6b35f19c240c99067ca702442</a> /<a href='/guix/tree/gnu/system/linux-initrd.scm?id=dfa373069df55bb4eb6e13792336db8e0fb85d1d'>gnu/system/linux-initrd.scm</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/guix/commit/gnu/system/linux-initrd.scm?id=ee221461c3ce52733906ba37e5c9c3dfa562c5af'>ee221461c3ce52733906ba37e5c9c3dfa562c5af</a> (<a href='/guix/diff/gnu/system/linux-initrd.scm?id=dfa373069df55bb4eb6e13792336db8e0fb85d1d&amp;id2=ee221461c3ce52733906ba37e5c9c3dfa562c5af'>diff</a>)</td></tr><tr><th>download</th><td colspan='2' class='oid'><a href='/guix/snapshot/guix-dfa373069df55bb4eb6e13792336db8e0fb85d1d.tar.gz'>guix-dfa373069df55bb4eb6e13792336db8e0fb85d1d.tar.gz</a><br/><a href='/guix/snapshot/guix-dfa373069df55bb4eb6e13792336db8e0fb85d1d.zip'>guix-dfa373069df55bb4eb6e13792336db8e0fb85d1d.zip</a><br/></td></tr></table>
<div class='commit-subject'>gnu: Add r-glmpca.</div><div class='commit-msg'>* gnu/packages/cran.scm (r-glmpca): New variable.
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