diff --git a/kernel/x86_64/cgemv_n_4.c b/kernel/x86_64/cgemv_n_4.c
index 162b7d99f..2a5afd5b3 100644
--- a/kernel/x86_64/cgemv_n_4.c
+++ b/kernel/x86_64/cgemv_n_4.c
@@ -30,7 +30,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "common.h"
 
 #if defined(HASWELL)
-#include "cgemv_n_microk_haswell-2.c"
+#include "cgemv_n_microk_haswell-4.c"
 #endif
 
 
@@ -73,6 +73,41 @@ static void cgemv_kernel_4x4(BLASLONG n, FLOAT **ap, FLOAT *x, FLOAT *y)
 	
 #endif
 
+
+
+#ifndef HAVE_KERNEL_4x2
+
+static void cgemv_kernel_4x2(BLASLONG n, FLOAT **ap, FLOAT *x, FLOAT *y)
+{
+	BLASLONG i;
+	FLOAT *a0,*a1;
+	a0 = ap[0];
+	a1 = ap[1];
+
+	for ( i=0; i< 2*n; i+=2 )
+	{
+#if ( !defined(CONJ) && !defined(XCONJ) ) || ( defined(CONJ) && defined(XCONJ) )
+		y[i]   += a0[i]*x[0] - a0[i+1] * x[1];
+		y[i+1] += a0[i]*x[1] + a0[i+1] * x[0];
+		y[i]   += a1[i]*x[2] - a1[i+1] * x[3];
+		y[i+1] += a1[i]*x[3] + a1[i+1] * x[2];
+#else 
+		y[i]   += a0[i]*x[0] + a0[i+1] * x[1];
+		y[i+1] += a0[i]*x[1] - a0[i+1] * x[0];
+		y[i]   += a1[i]*x[2] + a1[i+1] * x[3];
+		y[i+1] += a1[i]*x[3] - a1[i+1] * x[2];
+#endif
+	}
+}
+	
+#endif
+
+
+
+
+#ifndef HAVE_KERNEL_4x1
+
+
 static void cgemv_kernel_4x1(BLASLONG n, FLOAT *ap, FLOAT *x, FLOAT *y)
 {
 	BLASLONG i;
@@ -91,41 +126,85 @@ static void cgemv_kernel_4x1(BLASLONG n, FLOAT *ap, FLOAT *x, FLOAT *y)
 
 	}
 }
-	
-
-static void zero_y(BLASLONG n, FLOAT *dest)
-{
-	BLASLONG i;
-	for ( i=0; i<2*n; i++ )
-	{
-		*dest = 0.0;
-		dest++;
-	}
-}
 
 
+#endif
+
+
+static void add_y(BLASLONG n, FLOAT *src, FLOAT *dest, BLASLONG inc_dest,FLOAT alpha_r, FLOAT alpha_i)  __attribute__ ((noinline));
 
 static void add_y(BLASLONG n, FLOAT *src, FLOAT *dest, BLASLONG inc_dest,FLOAT alpha_r, FLOAT alpha_i)
 {
 	BLASLONG i;
-	FLOAT temp_r;
-	FLOAT temp_i;
-	for ( i=0; i<n; i++ )
+
+	if ( inc_dest != 2 )
 	{
+
+		FLOAT temp_r;
+		FLOAT temp_i;
+		for ( i=0; i<n; i++ )
+		{
 #if !defined(XCONJ) 
-		temp_r = alpha_r * src[0] - alpha_i * src[1];
-		temp_i = alpha_r * src[1] + alpha_i * src[0];
+			temp_r = alpha_r * src[0] - alpha_i * src[1];
+			temp_i = alpha_r * src[1] + alpha_i * src[0];
 #else
-		temp_r =  alpha_r * src[0] + alpha_i * src[1];
-		temp_i = -alpha_r * src[1] + alpha_i * src[0];
+			temp_r =  alpha_r * src[0] + alpha_i * src[1];
+			temp_i = -alpha_r * src[1] + alpha_i * src[0];
 #endif
 
-		*dest += temp_r;
-		*(dest+1) += temp_i;
+			*dest += temp_r;
+			*(dest+1) += temp_i;
 
-		src+=2;
-		dest += inc_dest;
+			src+=2;
+			dest += inc_dest;
+		}
+		return;
 	}
+
+	FLOAT temp_r0;
+	FLOAT temp_i0;
+	FLOAT temp_r1;
+	FLOAT temp_i1;
+	FLOAT temp_r2;
+	FLOAT temp_i2;
+	FLOAT temp_r3;
+	FLOAT temp_i3;
+	for ( i=0; i<n; i+=4 )
+	{
+#if !defined(XCONJ) 
+		temp_r0 = alpha_r * src[0] - alpha_i * src[1];
+		temp_i0 = alpha_r * src[1] + alpha_i * src[0];
+		temp_r1 = alpha_r * src[2] - alpha_i * src[3];
+		temp_i1 = alpha_r * src[3] + alpha_i * src[2];
+		temp_r2 = alpha_r * src[4] - alpha_i * src[5];
+		temp_i2 = alpha_r * src[5] + alpha_i * src[4];
+		temp_r3 = alpha_r * src[6] - alpha_i * src[7];
+		temp_i3 = alpha_r * src[7] + alpha_i * src[6];
+#else
+		temp_r0 =  alpha_r * src[0] + alpha_i * src[1];
+		temp_i0 = -alpha_r * src[1] + alpha_i * src[0];
+		temp_r1 =  alpha_r * src[2] + alpha_i * src[3];
+		temp_i1 = -alpha_r * src[3] + alpha_i * src[2];
+		temp_r2 =  alpha_r * src[4] + alpha_i * src[5];
+		temp_i2 = -alpha_r * src[5] + alpha_i * src[4];
+		temp_r3 =  alpha_r * src[6] + alpha_i * src[7];
+		temp_i3 = -alpha_r * src[7] + alpha_i * src[6];
+#endif
+
+		dest[0]   += temp_r0;
+		dest[1]   += temp_i0;
+		dest[2]   += temp_r1;
+		dest[3]   += temp_i1;
+		dest[4]   += temp_r2;
+		dest[5]   += temp_i2;
+		dest[6]   += temp_r3;
+		dest[7]   += temp_i3;
+
+		src  += 8;
+		dest += 8;
+	}
+	return;
+
 }
 
 int CNAME(BLASLONG m, BLASLONG n, BLASLONG dummy1, FLOAT alpha_r,FLOAT alpha_i, FLOAT *a, BLASLONG lda, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y, FLOAT *buffer)
@@ -186,7 +265,8 @@ printf("%s %d %d %.16f %.16f %d %d %d\n","zgemv_n",m,n,alpha_r,alpha_i,lda,inc_x
 		ap[2] = ap[1] + lda;
 		ap[3] = ap[2] + lda;
 		x_ptr = x;
-		zero_y(NB,ybuffer);
+		//zero_y(NB,ybuffer);
+		memset(ybuffer,0,NB*8);
 
 		if ( inc_x == 2 )
 		{
@@ -202,7 +282,15 @@ printf("%s %d %d %.16f %.16f %d %d %d\n","zgemv_n",m,n,alpha_r,alpha_i,lda,inc_x
 				x_ptr += 8;	
 			}
 
-			for( i = 0; i < n2 ; i++)
+			if ( n2 & 2 )
+			{
+				cgemv_kernel_4x2(NB,ap,x_ptr,ybuffer);
+				x_ptr += 4;	
+				a_ptr += 2 * lda;
+
+			}
+
+			if ( n2 & 1 )
 			{
 				cgemv_kernel_4x1(NB,a_ptr,x_ptr,ybuffer);
 				x_ptr += 2;