Updated data prefetch in TRSM, ASUM, DOT functions

Signed-off-by: kaustubh <kaustubh.raste@imgtec.com>

kernel/mips/macros_msa.h

@@ -32,6 +32,23 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #define ENABLE_PREFETCH
 
+#ifdef ENABLE_PREFETCH
+inline static void prefetch_load_lf(unsigned char *src)
+{
+    __asm__ __volatile__("pref   0,  0(%[src])   \n\t" : : [src] "r" (src));
+}
+
+#define PREFETCH(PTR)   prefetch_load_lf((unsigned char *)(PTR));
+
+#define STRNG(X) #X
+#define PREF_OFFSET(src_ptr, offset)		      \
+    __asm__ __volatile__("pref 0, " STRNG(offset) "(%[src]) \n\t" : : [src] "r" (src_ptr));
+
+#else
+#define PREFETCH(PTR)
+#define PREF_OFFSET(src_ptr, offset)
+#endif
+
 #define LD_W(RTYPE, psrc) *((RTYPE *)(psrc))
 #define LD_SP(...) LD_W(v4f32, __VA_ARGS__)