rs6000: Fix _mm_movemask_pi8 emulation for 32 bit

	* config/rs6000/xmmintrin.h (_mm_movemask_pi8): Implement for 32-bit
	big endian.

From-SVN: r269891

gcc/ChangeLog

+2019-03-23  Segher Boessenkool  <segher@kernel.crashing.org>
+
+	* config/rs6000/xmmintrin.h (_mm_movemask_pi8): Implement for 32-bit
+	big endian.
+
 2019-03-22  Andrew Pinski  <apinski@marvell.com>
 
 	* config/aarch64/aarch64.md (zero_extendsidi2_aarch64): Fix type

gcc/config/rs6000/xmmintrin.h

@@ -1586,9 +1586,15 @@ _mm_movemask_pi8 (__m64 __A)
 #endif
   return __builtin_bpermd (p, __A);
 #else
+#ifdef __LITTLE_ENDIAN__
   unsigned int mask = 0x20283038UL;
   unsigned int r1 = __builtin_bpermd (mask, __A) & 0xf;
   unsigned int r2 = __builtin_bpermd (mask, __A >> 32) & 0xf;
+#else
+  unsigned int mask = 0x38302820UL;
+  unsigned int r1 = __builtin_bpermd (mask, __A >> 32) & 0xf;
+  unsigned int r2 = __builtin_bpermd (mask, __A) & 0xf;
+#endif
   return (r2 << 4) | r1;
 #endif
 }