diff --git a/tests/fate/xvid.mak b/tests/fate/xvid.mak
index 2b593b59fb..68f01b5827 100644
--- a/tests/fate/xvid.mak
+++ b/tests/fate/xvid.mak
@@ -1,6 +1,9 @@
-fate-xvid-custom-matrix: CMD = framemd5 -flags +bitexact -idct simple -i $(TARGET_SAMPLES)/mpeg4/xvid_vlc_trac7411.h263
+fate-xvid-custom-matrix: CMD = framemd5 -flags +bitexact -idct simple  -i $(TARGET_SAMPLES)/mpeg4/xvid_vlc_trac7411.h263
+fate-xvid-idctmmx:       CMD = framemd5 -flags +bitexact -cpuflags all -i $(TARGET_SAMPLES)/mpeg4/xvid_vlc_trac7411.h263
 
 FATE_XVID-$(call DEMDEC, M4V, MPEG4) += fate-xvid-custom-matrix
+FATE_XVID-$(filter $(HAVE_MMX_INLINE), $(call DEMDEC, M4V, MPEG4)) += fate-xvid-idctmmx
+
 FATE_SAMPLES_AVCONV += $(FATE_XVID-yes)
 
 fate-xvid: $(FATE_XVID-yes)
diff --git a/tests/ref/fate/xvid-idctmmx b/tests/ref/fate/xvid-idctmmx
new file mode 100644
index 0000000000..2fc93ee684
--- /dev/null
+++ b/tests/ref/fate/xvid-idctmmx
@@ -0,0 +1,25 @@
+#format: frame checksums
+#version: 1
+#hash: MD5
+#tb 0: 1/25
+#stream#, dts,        pts, duration,     size, hash
+0,          0,          0,        1,   622080, 8fe318df973b5d7669e6d28ebf03b229
+0,          1,          1,        1,   622080, 3568d92074e0298a2027f990004fe1a6
+0,          2,          2,        1,   622080, 4781afb6ba38318738e26a98ace4061b
+0,          3,          3,        1,   622080, bd29a005b8392005ef30211f185ca049
+0,          4,          4,        1,   622080, fc50b441ee9256883edba5a584000d66
+0,          5,          5,        1,   622080, 5fce9fb7e66c9d0773ff9c7482cb8307
+0,          6,          6,        1,   622080, 2e0ad7b1ba39e60cdd7a65ed1ed57c30
+0,          7,          7,        1,   622080, b91cfdb91751dabd6691d3c34221b636
+0,          8,          8,        1,   622080, f65507bc00043e8fe345c542f0861a64
+0,          9,          9,        1,   622080, 2e4ee4ea4ec761c2298acced17f63f35
+0,         10,         10,        1,   622080, e7945bd07296205d1549c8edf843af48
+0,         11,         11,        1,   622080, 52fed0ec02c57a138de7dc0e0c804de8
+0,         12,         12,        1,   622080, 3ee2848d0d70795e14765127111a677c
+0,         13,         13,        1,   622080, 42cb0929406b10b95817ffaa2da47335
+0,         14,         14,        1,   622080, 523986866b6cf729e130ea43feacb0a2
+0,         15,         15,        1,   622080, 5d1e4becddf728e93bbcb428de1f02ae
+0,         16,         16,        1,   622080, 0a1453df21e4547447ec8f27a0d4d5ec
+0,         17,         17,        1,   622080, d3495686e769df299b1732326fa3f17e
+0,         18,         18,        1,   622080, 602e9020397b1e82b58b1ff6b9733d21
+0,         21,         21,        1,   622080, 759bd3f739a3b99309efa5c1a697e34d