[Xen-devel] Re: [PATCH] stubdom: x86_32 compilation fix

[Samuel Thibault <samuel.thibault@xxxxxxxxxxxxx>]

Samuel Thibault, le Tue 26 Feb 2008 15:01:31 +0000, a écrit :
> stubdom: fix x86_32 compilation by __moddi3 from FreeBSD
> (like has been done previously for umoddi3 etc.)

Oops, sorry, that was the unfixed version, here is the fixed one:



stubdom: fix x86_32 compilation by __moddi3 from FreeBSD
(like has been done previously for umoddi3 etc.)

Signed-off-by: Samuel Thibault <samuel.thibault@xxxxxxxxxxxxx>

diff -r 09af1b46f89f extras/mini-os/lib/math.c
--- a/extras/mini-os/lib/math.c Tue Feb 26 13:12:55 2008 +0000
+++ b/extras/mini-os/lib/math.c Tue Feb 26 14:57:50 2008 +0000
@@ -388,6 +388,29 @@ __umoddi3(u_quad_t a, u_quad_t b)
         return (r);
 }
 
+/*
+ * Return remainder after dividing two signed quads.
+ *
+ * XXX
+ * If -1/2 should produce -1 on this machine, this code is wrong.
+ */
+quad_t
+__moddi3(quad_t a, quad_t b)
+{
+       u_quad_t ua, ub, ur;
+       int neg;
+
+       if (a < 0)
+               ua = -(u_quad_t)a, neg = 1;
+       else
+               ua = a, neg = 0;
+       if (b < 0)
+               ub = -(u_quad_t)b;
+       else
+               ub = b;
+       (void)__qdivrem(ua, ub, &ur);
+       return (neg ? -ur : ur);
+}
 #endif /* !defined(__ia64__) */
 
 #ifndef HAVE_LIBC

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