diff --git a/projects/hip/include/hip/hcc_detail/hip_runtime.h b/projects/hip/include/hip/hcc_detail/hip_runtime.h
index b1edef18d7..b501f0b165 100644
--- a/projects/hip/include/hip/hcc_detail/hip_runtime.h
+++ b/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__
diff --git a/projects/hip/include/hip/hcc_detail/hip_vector_types.h b/projects/hip/include/hip/hcc_detail/hip_vector_types.h
index 5c2e48026e..932e271527 100644
--- a/projects/hip/include/hip/hcc_detail/hip_vector_types.h
+++ b/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;);
diff --git a/projects/hip/src/hip_hcc.cpp b/projects/hip/src/hip_hcc.cpp
index d066079fc0..3ebe9c3647 100644
--- a/projects/hip/src/hip_hcc.cpp
+++ b/projects/hip/src/hip_hcc.cpp
@@ -217,6 +217,42 @@ __device__ float __hip_ds_swizzlef(float src, int pattern) {
 __device__ int __hip_move_dpp(int src, int dpp_ctrl, int row_mask, int bank_mask, bool bound_ctrl) {
     return hc::__amdgcn_move_dpp(src, dpp_ctrl, row_mask, bank_mask, bound_ctrl);
 }
+
+#define MASK1 0x00ff00ff
+#define MASK2 0xff00ff00
+
+__device__ char4 __hip_hc_add8pk(char4 in1, char4 in2) {
+    char4 out;
+    unsigned one1 = in1.val & MASK1;
+    unsigned one2 = in2.val & MASK1;
+    out.val = (one1 + one2) & MASK1;
+    one1 = in1.val & MASK2;
+    one2 = in2.val & MASK2;
+    out.val = out.val | ((one1 + one2) & MASK2);
+    return out;
+}
+
+__device__ char4 __hip_hc_sub8pk(char4 in1, char4 in2) {
+    char4 out;
+    unsigned one1 = in1.val & MASK1;
+    unsigned one2 = in2.val & MASK1;
+    out.val = (one1 - one2) & MASK1;
+    one1 = in1.val & MASK2;
+    one2 = in2.val & MASK2;
+    out.val = out.val | ((one1 - one2) & MASK2);
+    return out; 
+}
+
+__device__ char4 __hip_hc_mul8pk(char4 in1, char4 in2) {
+    char4 out;
+    unsigned one1 = in1.val & MASK1;
+    unsigned one2 = in2.val & MASK1;
+    out.val = (one1 * one2) & MASK1;
+    one1 = in1.val & MASK2;
+    one2 = in2.val & MASK2;
+    out.val = out.val | ((one1 * one2) & MASK2);
+    return out;
+}
 //=================================================================================================
 // Thread-local storage:
 //=================================================================================================