diff --git a/kernel/x86_64/sbgemm_otcopy_16_spr.c b/kernel/x86_64/sbgemm_otcopy_16_spr.c
index 2f57ae7b6..b5d5d38fb 100644
--- a/kernel/x86_64/sbgemm_otcopy_16_spr.c
+++ b/kernel/x86_64/sbgemm_otcopy_16_spr.c
@@ -25,8 +25,278 @@
  * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  * *****************************************************************************/
 
+#include <immintrin.h>
 #include "common.h"
 
+#define LOAD_A_8VEC(aptr)  \
+	r0 = _mm256_loadu_si256((__m256i *)(aptr + lda*0)); \
+	r1 = _mm256_loadu_si256((__m256i *)(aptr + lda*1)); \
+	r2 = _mm256_loadu_si256((__m256i *)(aptr + lda*2)); \
+	r3 = _mm256_loadu_si256((__m256i *)(aptr + lda*3)); \
+	r4 = _mm256_loadu_si256((__m256i *)(aptr + lda*4)); \
+	r5 = _mm256_loadu_si256((__m256i *)(aptr + lda*5)); \
+	r6 = _mm256_loadu_si256((__m256i *)(aptr + lda*6)); \
+	r7 = _mm256_loadu_si256((__m256i *)(aptr + lda*7));
+
+#define MASK_LOAD_A_8VEC(aptr)  \
+	r0 = _mm256_maskz_loadu_epi16(nmask, (__m256i *)(aptr + lda*0)); \
+	r1 = _mm256_maskz_loadu_epi16(nmask, (__m256i *)(aptr + lda*1)); \
+	r2 = _mm256_maskz_loadu_epi16(nmask, (__m256i *)(aptr + lda*2)); \
+	r3 = _mm256_maskz_loadu_epi16(nmask, (__m256i *)(aptr + lda*3)); \
+	r4 = _mm256_maskz_loadu_epi16(nmask, (__m256i *)(aptr + lda*4)); \
+	r5 = _mm256_maskz_loadu_epi16(nmask, (__m256i *)(aptr + lda*5)); \
+	r6 = _mm256_maskz_loadu_epi16(nmask, (__m256i *)(aptr + lda*6)); \
+	r7 = _mm256_maskz_loadu_epi16(nmask, (__m256i *)(aptr + lda*7));
+
+#define SWITCH_LOAD_A_8VEC(aptr, cond) \
+	switch((cond)) { \
+		case 8: r7 = _mm256_loadu_si256((__m256i *)(aptr + lda*7)); \
+		case 7: r6 = _mm256_loadu_si256((__m256i *)(aptr + lda*6)); \
+		case 6: r5 = _mm256_loadu_si256((__m256i *)(aptr + lda*5)); \
+		case 5: r4 = _mm256_loadu_si256((__m256i *)(aptr + lda*4)); \
+		case 4: r3 = _mm256_loadu_si256((__m256i *)(aptr + lda*3)); \
+		case 3: r2 = _mm256_loadu_si256((__m256i *)(aptr + lda*2)); \
+		case 2: r1 = _mm256_loadu_si256((__m256i *)(aptr + lda*1)); \
+		case 1: r0 = _mm256_loadu_si256((__m256i *)(aptr + lda*0)); \
+	}
+
+#define SWITCH_MASK_LOAD_A_8VEC(aptr, cond) \
+	switch((cond)) { \
+		case 8: r7 = _mm256_maskz_loadu_epi16(nmask, (__m256i *)(aptr + lda*7)); \
+		case 7: r6 = _mm256_maskz_loadu_epi16(nmask, (__m256i *)(aptr + lda*6)); \
+		case 6: r5 = _mm256_maskz_loadu_epi16(nmask, (__m256i *)(aptr + lda*5)); \
+		case 5: r4 = _mm256_maskz_loadu_epi16(nmask, (__m256i *)(aptr + lda*4)); \
+		case 4: r3 = _mm256_maskz_loadu_epi16(nmask, (__m256i *)(aptr + lda*3)); \
+		case 3: r2 = _mm256_maskz_loadu_epi16(nmask, (__m256i *)(aptr + lda*2)); \
+		case 2: r1 = _mm256_maskz_loadu_epi16(nmask, (__m256i *)(aptr + lda*1)); \
+		case 1: r0 = _mm256_maskz_loadu_epi16(nmask, (__m256i *)(aptr + lda*0)); \
+	}
+
+#define REORDER_8x16(t0, t1, t2, t3, t4, t5, t6, t7) \
+	t0 = _mm256_unpacklo_epi16(r0, r1); \
+	t1 = _mm256_unpackhi_epi16(r0, r1); \
+	t2 = _mm256_unpacklo_epi16(r2, r3); \
+	t3 = _mm256_unpackhi_epi16(r2, r3); \
+	t4 = _mm256_unpacklo_epi16(r4, r5); \
+	t5 = _mm256_unpackhi_epi16(r4, r5); \
+	t6 = _mm256_unpacklo_epi16(r6, r7); \
+	t7 = _mm256_unpackhi_epi16(r6, r7); \
+	r0 = _mm256_unpacklo_epi32(t0, t2); \
+	r1 = _mm256_unpacklo_epi32(t1, t3); \
+	r2 = _mm256_unpacklo_epi32(t4, t6); \
+	r3 = _mm256_unpacklo_epi32(t5, t7); \
+	r4 = _mm256_unpackhi_epi32(t0, t2); \
+	r5 = _mm256_unpackhi_epi32(t1, t3); \
+	r6 = _mm256_unpackhi_epi32(t4, t6); \
+	r7 = _mm256_unpackhi_epi32(t5, t7); \
+	t0 = _mm256_unpacklo_epi64(r0, r2); \
+	t1 = _mm256_unpackhi_epi64(r0, r2); \
+	t2 = _mm256_unpacklo_epi64(r4, r6); \
+	t3 = _mm256_unpackhi_epi64(r4, r6); \
+	t4 = _mm256_unpacklo_epi64(r1, r3); \
+	t5 = _mm256_unpackhi_epi64(r1, r3); \
+	t6 = _mm256_unpacklo_epi64(r5, r7); \
+	t7 = _mm256_unpackhi_epi64(r5, r7);
+
+#define STORE_256_LO(x) \
+	v = _mm256_permute2x128_si256(t0##x, t1##x, 0x20); \
+	_mm256_storeu_si256((__m256i *)(boffset + x*32), v);
+
+#define STORE_256_HI(x) \
+	v = _mm256_permute2x128_si256(t0##x, t1##x, 0x31); \
+	_mm256_storeu_si256((__m256i *)(boffset + (x + 8)*32), v);
+
+#define MASK_STORE_256_LO(x) \
+	v = _mm256_permute2x128_si256(t0##x, t1##x, 0x20); \
+	_mm256_mask_storeu_epi16(boffset + x*m_load, mmask, v);
+
+#define MASK_STORE_256_HI(x) \
+	v = _mm256_permute2x128_si256(t0##x, t1##x, 0x31); \
+	_mm256_mask_storeu_epi16(boffset + (x + 8)*m_load, mmask, v);
+
+#define STORE_256(x, y) {\
+	__m256i v; \
+	if (x == 0) { STORE_256_LO(y); } \
+	else { STORE_256_HI(y); } \
+}
+
+#define MASK_STORE_256(x, y) {\
+	__m256i v; \
+	if (x == 0) { MASK_STORE_256_LO(y); } \
+	else { MASK_STORE_256_HI(y); } \
+}
+
+#define SWITCH_STORE_16x(cond, func) \
+	switch((cond)) {\
+		case 15: func(1, 6); \
+		case 14: func(1, 5); \
+		case 13: func(1, 4); \
+		case 12: func(1, 3); \
+		case 11: func(1, 2); \
+		case 10: func(1, 1); \
+		case 9: func(1, 0); \
+		case 8: func(0, 7); \
+		case 7: func(0, 6); \
+		case 6: func(0, 5); \
+		case 5: func(0, 4); \
+		case 4: func(0, 3); \
+		case 3: func(0, 2); \
+		case 2: func(0, 1); \
+		case 1: func(0, 0); \
+	}
+
+
 int CNAME(BLASLONG m, BLASLONG n, IFLOAT *a, BLASLONG lda, IFLOAT *b) {
+	IFLOAT *aoffset, *boffset;
+	IFLOAT *aoffset00, *aoffset01, *aoffset10, *aoffset11;
+	IFLOAT *boffset0;
+
+	__m256i r0, r1, r2, r3, r4, r5, r6, r7;
+	__m256i t00, t01, t02, t03, t04, t05, t06, t07;
+	__m256i t10, t11, t12, t13, t14, t15, t16, t17;
+
+	aoffset = a;
+	boffset = b;
+	BLASLONG n_count = n;
+	BLASLONG m_count = m;
+	for (; n_count > 15; n_count -= 16) {
+		aoffset00 = aoffset;
+		aoffset01 = aoffset00 + 8 * lda;
+		aoffset10 = aoffset01 + 8 * lda;
+		aoffset11 = aoffset10 + 8 * lda;
+		aoffset += 16;
+		m_count = m;
+		for (; m_count > 31; m_count -= 32) {
+			// first 16 rows
+			LOAD_A_8VEC(aoffset00);
+			REORDER_8x16(t00, t01, t02, t03, t04, t05, t06, t07);
+			LOAD_A_8VEC(aoffset01);
+			REORDER_8x16(t10, t11, t12, t13, t14, t15, t16, t17);
+			STORE_256(0, 0); STORE_256(0, 1); STORE_256(0, 2); STORE_256(0, 3);
+			STORE_256(0, 4); STORE_256(0, 5); STORE_256(0, 6); STORE_256(0, 7);
+			STORE_256(1, 0); STORE_256(1, 1); STORE_256(1, 2); STORE_256(1, 3);
+			STORE_256(1, 4); STORE_256(1, 5); STORE_256(1, 6); STORE_256(1, 7);
+			// last 16 rows
+			boffset += 16;
+			LOAD_A_8VEC(aoffset10);
+			REORDER_8x16(t00, t01, t02, t03, t04, t05, t06, t07);
+			LOAD_A_8VEC(aoffset11);
+			REORDER_8x16(t10, t11, t12, t13, t14, t15, t16, t17);
+			STORE_256(0, 0); STORE_256(0, 1); STORE_256(0, 2); STORE_256(0, 3);
+			STORE_256(0, 4); STORE_256(0, 5); STORE_256(0, 6); STORE_256(0, 7);
+			STORE_256(1, 0); STORE_256(1, 1); STORE_256(1, 2); STORE_256(1, 3);
+			STORE_256(1, 4); STORE_256(1, 5); STORE_256(1, 6); STORE_256(1, 7);
+			aoffset00 += 32 * lda;
+			aoffset01 += 32 * lda;
+			aoffset10 += 32 * lda;
+			aoffset11 += 32 * lda;
+			boffset += 31 * 16;
+		}
+		if (m_count > 1) {
+			int m_load = m_count & ~1;
+			m_count -= m_load;
+			__mmask16 mmask;
+			SWITCH_LOAD_A_8VEC(aoffset00, m_load > 8 ? 8: m_load);
+			REORDER_8x16(t00, t01, t02, t03, t04, t05, t06, t07);
+			if (m_load > 8) {
+				SWITCH_LOAD_A_8VEC(aoffset01, m_load > 16 ? 8: m_load - 8);
+				REORDER_8x16(t10, t11, t12, t13, t14, t15, t16, t17);
+			}
+			int this_load = m_load > 16 ? 16 : m_load;
+			mmask = (1UL << this_load) - 1;
+			MASK_STORE_256(0, 0); MASK_STORE_256(0, 1); MASK_STORE_256(0, 2); MASK_STORE_256(0, 3);
+			MASK_STORE_256(0, 4); MASK_STORE_256(0, 5); MASK_STORE_256(0, 6); MASK_STORE_256(0, 7);
+			MASK_STORE_256(1, 0); MASK_STORE_256(1, 1); MASK_STORE_256(1, 2); MASK_STORE_256(1, 3);
+			MASK_STORE_256(1, 4); MASK_STORE_256(1, 5); MASK_STORE_256(1, 6); MASK_STORE_256(1, 7);
+			boffset0 = boffset;
+			if (m_load > 16) {
+				boffset += this_load;
+				SWITCH_LOAD_A_8VEC(aoffset10, m_load > 24 ? 8: m_load - 16);
+				REORDER_8x16(t00, t01, t02, t03, t04, t05, t06, t07);
+				if (m_load > 24) {
+					SWITCH_LOAD_A_8VEC(aoffset11, m_load - 24);
+					REORDER_8x16(t10, t11, t12, t13, t14, t15, t16, t17);
+				}
+				this_load = m_load - 16;
+				mmask = (1UL << this_load) - 1;
+				MASK_STORE_256(0, 0); MASK_STORE_256(0, 1); MASK_STORE_256(0, 2); MASK_STORE_256(0, 3);
+				MASK_STORE_256(0, 4); MASK_STORE_256(0, 5); MASK_STORE_256(0, 6); MASK_STORE_256(0, 7);
+				MASK_STORE_256(1, 0); MASK_STORE_256(1, 1); MASK_STORE_256(1, 2); MASK_STORE_256(1, 3);
+				MASK_STORE_256(1, 4); MASK_STORE_256(1, 5); MASK_STORE_256(1, 6); MASK_STORE_256(1, 7);
+			}
+			boffset = boffset0 + 16 * m_load;
+			aoffset00 += m_load * lda;
+		}
+		if (m_count > 0) {
+			// just copy lask K to B directly
+			r0 = _mm256_loadu_si256((__m256i *)(aoffset00));
+			_mm256_storeu_si256((__m256i *)(boffset), r0);
+			boffset += 16;
+		}
+	}
+	if (n_count > 0) {
+		__mmask16 nmask = (1UL << n_count) - 1;
+		aoffset00 = aoffset;
+		aoffset01 = aoffset00 + 8 * lda;
+		aoffset10 = aoffset01 + 8 * lda;
+		aoffset11 = aoffset10 + 8 * lda;
+		m_count = m;
+		for (; m_count > 31; m_count -= 32) {
+			// first 16 rows
+			MASK_LOAD_A_8VEC(aoffset00);
+			REORDER_8x16(t00, t01, t02, t03, t04, t05, t06, t07);
+			MASK_LOAD_A_8VEC(aoffset01);
+			REORDER_8x16(t10, t11, t12, t13, t14, t15, t16, t17);
+			SWITCH_STORE_16x(n_count, STORE_256);
+			// last 16 rows
+			boffset0 = boffset;
+			boffset += 16;
+			MASK_LOAD_A_8VEC(aoffset10);
+			REORDER_8x16(t00, t01, t02, t03, t04, t05, t06, t07);
+			MASK_LOAD_A_8VEC(aoffset11);
+			REORDER_8x16(t10, t11, t12, t13, t14, t15, t16, t17);
+			SWITCH_STORE_16x(n_count, STORE_256);
+			aoffset00 += 32 * lda;
+			aoffset01 += 32 * lda;
+			aoffset10 += 32 * lda;
+			aoffset11 += 32 * lda;
+			boffset = 32 * n_count + boffset0;
+		}
+		if (m_count > 1) {
+			int m_load = m_count & ~1;
+			m_count -= m_load;
+			__mmask16 mmask;
+			SWITCH_MASK_LOAD_A_8VEC(aoffset00, m_load > 8 ? 8: m_load);
+			REORDER_8x16(t00, t01, t02, t03, t04, t05, t06, t07);
+			if (m_load > 8) {
+				SWITCH_MASK_LOAD_A_8VEC(aoffset01, m_load > 16 ? 8: m_load - 8);
+				REORDER_8x16(t10, t11, t12, t13, t14, t15, t16, t17);
+			}
+			int this_load = m_load > 16 ? 16 : m_load;
+			mmask = (1UL << this_load) - 1;
+			SWITCH_STORE_16x(n_count, MASK_STORE_256);
+			boffset0 = boffset;
+			if (m_load > 16) {
+				boffset += this_load;
+				SWITCH_MASK_LOAD_A_8VEC(aoffset10, m_load > 24 ? 8: m_load - 16);
+				REORDER_8x16(t00, t01, t02, t03, t04, t05, t06, t07);
+				if (m_load > 24) {
+					SWITCH_MASK_LOAD_A_8VEC(aoffset11, m_load - 24);
+					REORDER_8x16(t10, t11, t12, t13, t14, t15, t16, t17);
+				}
+				this_load = m_load - 16;
+				mmask = (1UL << this_load) - 1;
+				SWITCH_STORE_16x(n_count, MASK_STORE_256);
+			}
+			boffset = boffset0 + n_count * m_load;
+			aoffset00 += m_load * lda;
+		}
+		if (m_count > 0) {
+			// just copy lask K to B directly
+			r0 = _mm256_maskz_loadu_epi16(nmask, (__m256i *)(aoffset00));
+			_mm256_mask_storeu_epi16((__m256i *)(boffset), nmask, r0);
+			boffset += 16;
+		}
+	}
 	return 0;
 }