Part 1/2 for contributing PPC64LE support for X86 SSE2 instrisics.

Part 1/2 for contributing PPC64LE support for X86 SSE2
instrisics. This patch includes the new (for PPC) emmintrin.h,
changes x86intrin.h to include xmmintrin.h, and associated
config.gcc changes.

From-SVN: r254234

gcc/ChangeLog

+2017-10-30  Steven Munroe  <munroesj@gcc.gnu.org>
+
+	* config.gcc (powerpc*-*-*): Add emmintrin.h.
+	* config/rs6000/emmintrin.h: New file.
+	* config/rs6000/x86intrin.h [__ALTIVEC__]: Include emmintrin.h.
+
 2017-10-30  Wilco Dijkstra  <wdijkstr@arm.com>
 
 	* config/arm/vfp.md (movdi_vfp): Merge changes from movdi_vfp_cortexa8.

gcc/config.gcc

@@ -459,7 +459,7 @@ powerpc*-*-*)
 	extra_objs="rs6000-string.o rs6000-p8swap.o"
 	extra_headers="ppc-asm.h altivec.h htmintrin.h htmxlintrin.h"
 	extra_headers="${extra_headers} bmi2intrin.h bmiintrin.h"
-	extra_headers="${extra_headers} xmmintrin.h mm_malloc.h"
+	extra_headers="${extra_headers} xmmintrin.h mm_malloc.h emmintrin.h"
 	extra_headers="${extra_headers} mmintrin.h x86intrin.h"
 	extra_headers="${extra_headers} ppu_intrinsics.h spu2vmx.h vec_types.h si2vmx.h"
 	extra_headers="${extra_headers} paired.h"

gcc/config/rs6000/x86intrin.h

@@ -39,6 +39,8 @@
 #include <mmintrin.h>
 
 #include <xmmintrin.h>
+
+#include <emmintrin.h>
 #endif /* __ALTIVEC__ */
 
 #include <bmiintrin.h>