--- firefox-49.0.2.orig/media/libyuv/source/row_mips.cc	2016-05-12 19:13:17.000000000 +0200
+++ firefox-49.0.2/media/libyuv/source/row_mips.cc	2016-11-11 18:22:43.471358929 +0100
@@ -16,7 +16,8 @@ extern "C" {
 #endif
 
 // The following are available on Mips platforms:
-#if !defined(LIBYUV_DISABLE_MIPS) && defined(__mips__)
+#if !defined(LIBYUV_DISABLE_MIPS) && defined(__mips__) && \
+    (_MIPS_SIM == _MIPS_SIM_ABI32)
 
 #include <sgidefs.h>
 
@@ -414,7 +415,8 @@ void CopyRow_MIPS(const uint8* src, uint
 
 // MIPS DSPR2 functions
 #if !defined(LIBYUV_DISABLE_MIPS) && defined(__mips_dsp) && \
-    (__mips_dsp_rev >= 2)
+    (__mips_dsp_rev >= 2) && \
+    (_MIPS_SIM == _MIPS_SIM_ABI32)
 void SplitUVRow_MIPS_DSPR2(const uint8* src_uv, uint8* dst_u, uint8* dst_v,
                            int width) {
   __asm__ __volatile__ (