Added i8 packed math intrinsics

1. Added add, sub, mul packed math i8 intrinsics
2. Removed c++ packed data structures included from HCC

Change-Id: I1d109c5ce10c48b7cd3ea059478b88fc1de78499
TODO: Add better packed data structures support


[ROCm/hip commit: 12dd9df88f]

projects/hip/include/hip/hcc_detail/hip_runtime.h

@@ -627,6 +627,10 @@ __device__ static inline void* free(void *ptr)
     return __hip_hc_free(ptr);
 }
 
+extern "C" __device__ char4 __hip_hc_add8pk(char4, char4);
+extern "C" __device__ char4 __hip_hc_sub8pk(char4, char4);
+extern "C" __device__ char4 __hip_hc_mul8pk(char4, char4);
+
 #define __syncthreads() hc_barrier(CLK_LOCAL_MEM_FENCE)
 
 #define HIP_KERNEL_NAME(...) __VA_ARGS__

projects/hip/include/hip/hcc_detail/hip_vector_types.h

@@ -32,7 +32,7 @@ THE SOFTWARE.
 #error("This version of HIP requires a newer version of HCC.");
 #endif
 
-#if __HCC__
+#if 0
 #include <hc_short_vector.hpp>
 
 using namespace hc::short_vector;
@@ -137,8 +137,24 @@ struct uchar3
     unsigned char x, y, z;
 };
 
-struct __hip_align(char4, 4, signed char x; signed char y; signed char z; signed char w;);
-struct __hip_align(uchar4, 4, unsigned char x; unsigned char y; unsigned char z; unsigned char w;);
+struct char4
+{
+    union {
+        signed char x, y, z, w;
+        unsigned int val;
+    };
+};
+
+struct uchar4
+{
+    union {
+        unsigned char x, y, z, w;
+        unsigned int val;
+    };
+};
+
+//struct __hip_align(char4, 4, signed char x; signed char y; signed char z; signed char w;);
+//struct __hip_align(uchar4, 4, unsigned char x; unsigned char y; unsigned char z; unsigned char w;);
 
 struct __hip_align(short1, 2, signed short x;);
 struct __hip_align(ushort1, 2, unsigned short x;);