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-rw-r--r--src/mesa/swrast/s_tritemp.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/mesa/swrast/s_tritemp.h b/src/mesa/swrast/s_tritemp.h
index d32a86bb88..93454346bd 100644
--- a/src/mesa/swrast/s_tritemp.h
+++ b/src/mesa/swrast/s_tritemp.h
@@ -1181,7 +1181,10 @@ static void NAME(GLcontext *ctx, const SWvertex *v0,
} /* span.end > 1 */
/* This is where we actually generate fragments */
- if (span.end > 0) {
+ /* XXX the test for span.y > 0 _shouldn't_ be needed but
+ * it fixes a problem on 64-bit Opterons (bug 4842).
+ */
+ if (span.end > 0 && span.y >= 0) {
RENDER_SPAN( span );
}