Initial support for ppc64le (#1316)

Signed-off-by: mgiessing <marvin.giessing@gmail.com>

include/Portable.h

@@ -26,8 +26,31 @@ typedef struct {float a; float b; float c; float d;} __m128;
 typedef struct {int a; int b; int c; int d;} __m128i;
 typedef struct {double a; double b;} __m128d;
 #endif
+#elif defined(__powerpc64__)
+#ifdef __CUDACC__
+#undef USE_VSX // Doesn't work with nvcc, undefined symbols
+#else
+#include <altivec.h>
+#undef USE_VSX // Not yet implemented
+#endif
+#undef USE_AVX // x86_64 only
+#undef USE_AVX2 // x86_64 only
+#undef USE_SSE2 // x86_64 only
+#undef USE_SSE41 // x86_64 only
+#undef USE_SSE42 // x86_64 only
+#undef USE_FMA // x86_64 only
+#ifdef USE_VSX
+typedef vector float __m128;
+typedef vector signed int __m128i;
+typedef vector double __m128d;
+#else
+typedef struct {float a; float b; float c; float d;} __m128;
+typedef struct {int a; int b; int c; int d;} __m128i;
+typedef struct {double a; double b;} __m128d;
+#endif
 #else
 #undef USE_NEON // ARM64 only
+#undef USE_VSX // PPC only
 #ifdef __FMA__
 #define USE_FMA
 #endif

include/SIMD.h

@@ -41,7 +41,7 @@ template <> struct InstrFloatTraits<Scalar, double>
 }
 }
 
-#if !defined(__aarch64__)
+#if !defined(__aarch64__) && !defined(__powerpc64__)
 #ifdef USE_SSE42
 #ifndef _MSC_VER
 #include <popcntintrin.h>

include/Type.h

@@ -10,7 +10,7 @@ using std::size_t;
 
 namespace BinSearch {
 
-enum InstrSet { Scalar, SSE, AVX, Neon };
+enum InstrSet { Scalar, SSE, AVX, Neon, VSX };
 
 #define ALGOENUM(x, b) x,
 enum Algos