add .c and .h files for bgemm interface

cblas.h

@@ -1,3 +1,31 @@
+/***************************************************************************
+ * Copyright (c) 2025, The OpenBLAS Project
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name of the OpenBLAS project nor the names of
+ * its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBLAS PROJECT OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ * *****************************************************************************/
+
 #ifndef CBLAS_H
 #define CBLAS_H
 
@@ -446,6 +474,9 @@ void   cblas_sbgemm(OPENBLAS_CONST enum CBLAS_ORDER Order, OPENBLAS_CONST enum C
 void cblas_sbgemm_batch(OPENBLAS_CONST enum CBLAS_ORDER Order, OPENBLAS_CONST enum CBLAS_TRANSPOSE * TransA_array, OPENBLAS_CONST enum CBLAS_TRANSPOSE * TransB_array, OPENBLAS_CONST blasint * M_array, OPENBLAS_CONST blasint * N_array, OPENBLAS_CONST blasint * K_array,
 		       OPENBLAS_CONST float * alpha_array, OPENBLAS_CONST bfloat16 ** A_array, OPENBLAS_CONST blasint * lda_array, OPENBLAS_CONST bfloat16 ** B_array, OPENBLAS_CONST blasint * ldb_array, OPENBLAS_CONST float * beta_array, float ** C_array, OPENBLAS_CONST blasint * ldc_array, OPENBLAS_CONST blasint group_count, OPENBLAS_CONST blasint * group_size);
 
+void   cblas_bgemm(OPENBLAS_CONST enum CBLAS_ORDER Order, OPENBLAS_CONST enum CBLAS_TRANSPOSE TransA, OPENBLAS_CONST enum CBLAS_TRANSPOSE TransB, OPENBLAS_CONST blasint M, OPENBLAS_CONST blasint N, OPENBLAS_CONST blasint K,
+		    OPENBLAS_CONST bfloat16 alpha, OPENBLAS_CONST bfloat16 *A, OPENBLAS_CONST blasint lda, OPENBLAS_CONST bfloat16 *B, OPENBLAS_CONST blasint ldb, OPENBLAS_CONST bfloat16 beta, bfloat16 *C, OPENBLAS_CONST blasint ldc);
+
 #ifdef __cplusplus
 }
 #endif  /* __cplusplus */

common.h

@@ -1,5 +1,6 @@
 /*********************************************************************/
 /* Copyright 2009, 2010 The University of Texas at Austin.           */
+/* Copyright 2025 The OpenBLAS Project.						                   */
 /* All rights reserved.                                              */
 /*                                                                   */
 /* Redistribution and use in source and binary forms, with or        */
@@ -306,6 +307,13 @@ typedef int blasint;
 #define SIZE	8
 #define  BASE_SHIFT 3
 #define ZBASE_SHIFT 4
+#elif defined(BFLOAT16_ONLY)
+#define IFLOAT	bfloat16
+#define XFLOAT  IFLOAT
+#define FLOAT	bfloat16
+#define SIZE   2
+#define BASE_SHIFT 1
+#define ZBASE_SHIFT 2
 #elif defined(BFLOAT16)
 #define IFLOAT	bfloat16
 #define XFLOAT IFLOAT

common_b.h

@@ -0,0 +1,58 @@
+/***************************************************************************
+ * Copyright (c) 2025, The OpenBLAS Project
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name of the OpenBLAS project nor the names of
+ * its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBLAS PROJECT OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ * *****************************************************************************/
+
+#ifndef COMMON_B_H
+#define COMMON_B_H
+
+// for now, only support DYNAMIC_ARCH = 0 case.
+
+#define	BGEMM_ONCOPY		bgemm_oncopy
+#define	BGEMM_OTCOPY		bgemm_otcopy
+#define	BGEMM_INCOPY		bgemm_incopy
+#define	BGEMM_ITCOPY		bgemm_itcopy
+
+#define	BGEMM_BETA		bgemm_beta
+#define BGEMM_KERNEL            bgemm_kernel
+
+#define	BGEMM_NN		bgemm_nn
+#define	BGEMM_CN		bgemm_tn
+#define	BGEMM_TN		bgemm_tn
+#define	BGEMM_NC		bgemm_nt
+#define	BGEMM_NT		bgemm_nt
+#define	BGEMM_CC		bgemm_tt
+#define	BGEMM_CT		bgemm_tt
+#define	BGEMM_TC		bgemm_tt
+#define	BGEMM_TT		bgemm_tt
+#define	BGEMM_NR		bgemm_nn
+#define	BGEMM_TR		bgemm_tn
+#define	BGEMM_CR		bgemm_tn
+#define	BGEMM_RN		bgemm_nn
+#define	BGEMM_RT		bgemm_nt
+#define	BGEMM_RC		bgemm_nt
+#define	BGEMM_RR		bgemm_nn
+#endif

common_interface.h

@@ -1,5 +1,6 @@
 /*********************************************************************/
 /* Copyright 2009, 2010 The University of Texas at Austin.           */
+/* Copyright 2025 The OpenBLAS Project.						 		 */
 /* All rights reserved.                                              */
 /*                                                                   */
 /* Redistribution and use in source and binary forms, with or        */
@@ -480,7 +481,8 @@ void BLASFUNC(xhbmv)(char *, blasint *, blasint *, xdouble *, xdouble *, blasint
 		    xdouble *, blasint *, xdouble *, xdouble *, blasint *);
 
 /* Level 3 routines */
-
+void BLASFUNC(bgemm)(char *, char *, blasint *, blasint *, blasint *, bfloat16 *,
+	   bfloat16 *, blasint *, bfloat16 *, blasint *, bfloat16 *, bfloat16 *, blasint *);
 void BLASFUNC(sbgemm)(char *, char *, blasint *, blasint *, blasint *, float *,
 	   bfloat16 *, blasint *, bfloat16 *, blasint *, float *, float *, blasint *);
 void BLASFUNC(sgemm)(char *, char *, blasint *, blasint *, blasint *, float *,

common_level3.h

@@ -54,7 +54,8 @@ void sgemm_direct(BLASLONG M, BLASLONG N, BLASLONG K,
 
 int sgemm_direct_performant(BLASLONG M, BLASLONG N, BLASLONG K);
 
-
+int bgemm_beta(BLASLONG, BLASLONG, BLASLONG, bfloat16,
+	       bfloat16 *, BLASLONG, bfloat16 *, BLASLONG, bfloat16 *, BLASLONG);
 int sbgemm_beta(BLASLONG, BLASLONG, BLASLONG, float,
 	       bfloat16 *, BLASLONG, bfloat16 *, BLASLONG, float *, BLASLONG);
 int sgemm_beta(BLASLONG, BLASLONG, BLASLONG, float,
@@ -78,6 +79,12 @@ int xgemm_beta(BLASLONG, BLASLONG, BLASLONG, xdouble *,
 	       xdouble *, BLASLONG, xdouble  *, BLASLONG, xdouble *, BLASLONG);
 #endif
 
+// add bgemm copy functions
+int bgemm_incopy(BLASLONG m, BLASLONG n, bfloat16 *a, BLASLONG lda, bfloat16 *b);
+int bgemm_itcopy(BLASLONG m, BLASLONG n, bfloat16 *a, BLASLONG lda, bfloat16 *b);
+int bgemm_oncopy(BLASLONG m, BLASLONG n, bfloat16 *a, BLASLONG lda, bfloat16 *b);
+int bgemm_otcopy(BLASLONG m, BLASLONG n, bfloat16 *a, BLASLONG lda, bfloat16 *b);
+
 int sbgemm_incopy(BLASLONG m, BLASLONG n, bfloat16 *a, BLASLONG lda, bfloat16 *b);
 int sbgemm_itcopy(BLASLONG m, BLASLONG n, bfloat16 *a, BLASLONG lda, bfloat16 *b);
 int sbgemm_oncopy(BLASLONG m, BLASLONG n, bfloat16 *a, BLASLONG lda, bfloat16 *b);
@@ -505,6 +512,8 @@ int xher2k_kernel_UC(BLASLONG m, BLASLONG n, BLASLONG k, xdouble alpha_r, xdoubl
 int xher2k_kernel_LN(BLASLONG m, BLASLONG n, BLASLONG k, xdouble alpha_r, xdouble alpha_i, xdouble *a, xdouble *b, xdouble *c, BLASLONG ldc, BLASLONG offset, int flag);
 int xher2k_kernel_LC(BLASLONG m, BLASLONG n, BLASLONG k, xdouble alpha_r, xdouble alpha_i, xdouble *a, xdouble *b, xdouble *c, BLASLONG ldc, BLASLONG offset, int flag);
 
+// add bgemm kernel
+int bgemm_kernel(BLASLONG, BLASLONG, BLASLONG, bfloat16,  bfloat16 *, bfloat16 *, bfloat16 *, BLASLONG);
 int sbgemm_kernel(BLASLONG, BLASLONG, BLASLONG, float,  bfloat16 *, bfloat16 *, float *, BLASLONG);
 int sgemm_kernel(BLASLONG, BLASLONG, BLASLONG, float,  float  *, float  *, float  *, BLASLONG);
 int dgemm_kernel(BLASLONG, BLASLONG, BLASLONG, double, double *, double *, double *, BLASLONG);
@@ -657,6 +666,11 @@ int cgemm3m_kernel(BLASLONG, BLASLONG, BLASLONG, float,  float,  float  *, float
 int zgemm3m_kernel(BLASLONG, BLASLONG, BLASLONG, double, double, double *, double *, double *, BLASLONG);
 int xgemm3m_kernel(BLASLONG, BLASLONG, BLASLONG, xdouble, xdouble, xdouble *, xdouble *, xdouble *, BLASLONG);
 
+int bgemm_nn(blas_arg_t *, BLASLONG *, BLASLONG *, bfloat16 *, bfloat16 *, BLASLONG);
+int bgemm_nt(blas_arg_t *, BLASLONG *, BLASLONG *, bfloat16 *, bfloat16 *, BLASLONG);
+int bgemm_tn(blas_arg_t *, BLASLONG *, BLASLONG *, bfloat16 *, bfloat16 *, BLASLONG);
+int bgemm_tt(blas_arg_t *, BLASLONG *, BLASLONG *, bfloat16 *, bfloat16 *, BLASLONG);
+
 int sbgemm_nn(blas_arg_t *, BLASLONG *, BLASLONG *, bfloat16 *, bfloat16 *, BLASLONG);
 int sbgemm_nt(blas_arg_t *, BLASLONG *, BLASLONG *, bfloat16 *, bfloat16 *, BLASLONG);
 int sbgemm_tn(blas_arg_t *, BLASLONG *, BLASLONG *, bfloat16 *, bfloat16 *, BLASLONG);

common_macro.h

@@ -1,5 +1,6 @@
 /*********************************************************************/
 /* Copyright 2009, 2010 The University of Texas at Austin.           */
+/* Copyright 2025 The OpenBLAS Project.						                   */
 /* All rights reserved.                                              */
 /*                                                                   */
 /* Redistribution and use in source and binary forms, with or        */
@@ -39,6 +40,7 @@
 #ifndef COMMON_MACRO
 #define COMMON_MACRO
 
+#include "common_b.h"
 #include "common_sb.h"
 #include "common_s.h"
 #include "common_d.h"
@@ -657,8 +659,35 @@
 #define GEMM_SMALL_KERNEL_B0_TN    DGEMM_SMALL_KERNEL_B0_TN
 #define GEMM_SMALL_KERNEL_B0_TT    DGEMM_SMALL_KERNEL_B0_TT
 
-#elif defined(BFLOAT16)
+#elif defined(BFLOAT16_ONLY)
+#define GEMM_BETA               BGEMM_BETA
+#define	GEMM_KERNEL_N		BGEMM_KERNEL
+#define	GEMM_KERNEL_L		BGEMM_KERNEL
+#define	GEMM_KERNEL_R		BGEMM_KERNEL
+#define	GEMM_KERNEL_B		BGEMM_KERNEL
+
+#define	GEMM_NN			BGEMM_NN
+#define	GEMM_CN			BGEMM_TN
+#define	GEMM_TN			BGEMM_TN
+#define	GEMM_NC			BGEMM_NT
+#define	GEMM_NT			BGEMM_NT
+#define	GEMM_CC			BGEMM_TT
+#define	GEMM_CT			BGEMM_TT
+#define	GEMM_TC			BGEMM_TT
+#define	GEMM_TT			BGEMM_TT
+#define	GEMM_NR			BGEMM_NN
+#define	GEMM_TR			BGEMM_TN
+#define	GEMM_CR			BGEMM_TN
+#define	GEMM_RN			BGEMM_NN
+#define	GEMM_RT			BGEMM_NT
+#define	GEMM_RC			BGEMM_NT
+#define	GEMM_RR			BGEMM_NN
+#define	GEMM_ONCOPY		BGEMM_ONCOPY
+#define	GEMM_OTCOPY		BGEMM_OTCOPY
+#define	GEMM_INCOPY		BGEMM_INCOPY
+#define	GEMM_ITCOPY		BGEMM_ITCOPY
 
+#elif defined(BFLOAT16)
 #define D_TO_BF16_K     SBDTOBF16_K
 #define D_BF16_TO_K     DBF16TOD_K
 #define S_TO_BF16_K     SBSTOBF16_K
@@ -2618,6 +2647,9 @@
       || defined(ARCH_LOONGARCH64) || defined(ARCH_E2K) || defined(ARCH_ALPHA))
 extern BLASLONG gemm_offset_a;
 extern BLASLONG gemm_offset_b;
+extern BLASLONG bgemm_p;
+extern BLASLONG bgemm_q;
+extern BLASLONG bgemm_r;
 extern BLASLONG sbgemm_p;
 extern BLASLONG sbgemm_q;
 extern BLASLONG sbgemm_r;

common_param.h

@@ -1,6 +1,6 @@
 /*********************************************************************/
 /* Copyright 2009, 2010 The University of Texas at Austin.           */
-/* Copyright 2023 The OpenBLAS Project.                              */
+/* Copyright 2023, 2025 The OpenBLAS Project.                        */
 /* All rights reserved.                                              */
 /*                                                                   */
 /* Redistribution and use in source and binary forms, with or        */
@@ -1357,6 +1357,19 @@ extern gotoblas_t *gotoblas;
 #define HAVE_EX_L2	0
 #endif
 
+#if (BUILD_BFLOAT16_ONLY == 1)
+#define	BGEMM_P		BGEMM_DEFAULT_P
+#define	BGEMM_Q		BGEMM_DEFAULT_Q
+#define	BGEMM_R		BGEMM_DEFAULT_R
+#define BGEMM_UNROLL_M	BGEMM_DEFAULT_UNROLL_M
+#define BGEMM_UNROLL_N	BGEMM_DEFAULT_UNROLL_N
+#ifdef  BGEMM_DEFAULT_UNROLL_MN
+#define BGEMM_UNROLL_MN	BGEMM_DEFAULT_UNROLL_MN
+#else
+#define BGEMM_UNROLL_MN	MAX((BGEMM_UNROLL_M), (BGEMM_UNROLL_N))
+#endif
+#endif
+
 #if (BUILD_BFLOAT16 == 1)
 #define	SBGEMM_P		SBGEMM_DEFAULT_P
 #define	SBGEMM_Q		SBGEMM_DEFAULT_Q
@@ -1517,6 +1530,18 @@ extern gotoblas_t *gotoblas;
 #define GEMM_DEFAULT_R		SBGEMM_DEFAULT_R
 #define GEMM_DEFAULT_UNROLL_M	SBGEMM_DEFAULT_UNROLL_M
 #define GEMM_DEFAULT_UNROLL_N	SBGEMM_DEFAULT_UNROLL_N
+#elif defined(BFLOAFT16_ONLY)
+#define GEMM_P			BGEMM_P
+#define GEMM_Q			BGEMM_Q
+#define GEMM_R			BGEMM_R
+#define GEMM_UNROLL_M		BGEMM_UNROLL_M
+#define GEMM_UNROLL_N		BGEMM_UNROLL_N
+#define GEMM_UNROLL_MN		BGEMM_UNROLL_MN
+#define GEMM_DEFAULT_P		BGEMM_DEFAULT_P
+#define GEMM_DEFAULT_Q		BGEMM_DEFAULT_Q
+#define GEMM_DEFAULT_R		BGEMM_DEFAULT_R
+#define GEMM_DEFAULT_UNROLL_M	BGEMM_DEFAULT_UNROLL_M
+#define GEMM_DEFAULT_UNROLL_N	BGEMM_DEFAULT_UNROLL_N
 #else
 #define GEMM_P			SGEMM_P
 #define GEMM_Q			SGEMM_Q

getarch_2nd.c

@@ -1,3 +1,31 @@
+/***************************************************************************
+ * Copyright (c) 2025, The OpenBLAS Project
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name of the OpenBLAS project nor the names of
+ * its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBLAS PROJECT OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ * *****************************************************************************/
+
 #include <stdio.h>
 #ifndef BUILD_KERNEL
 #include "config.h"
@@ -17,6 +45,10 @@ typedef unsigned long BLASULONG;
 int main(int argc, char **argv) {
 
   if ( (argc <= 1) || ((argc >= 2) && (*argv[1] == '0'))) {
+    printf("BGEMM_UNROLL_M=%d\n", BGEMM_DEFAULT_UNROLL_M);
+    printf("BGEMM_UNROLL_N=%d\n", BGEMM_DEFAULT_UNROLL_N);
+    printf("BGEMM_UNROLL_M=%d\n", BGEMM_DEFAULT_UNROLL_M);
+    printf("BGEMM_UNROLL_N=%d\n", BGEMM_DEFAULT_UNROLL_N);
     printf("SBGEMM_UNROLL_M=%d\n", SBGEMM_DEFAULT_UNROLL_M);
     printf("SBGEMM_UNROLL_N=%d\n", SBGEMM_DEFAULT_UNROLL_N);
     printf("SGEMM_UNROLL_M=%d\n", SGEMM_DEFAULT_UNROLL_M);

interface/gemm.c

@@ -56,6 +56,9 @@
 #elif defined(BFLOAT16)
 #define ERROR_NAME "SBGEMM "
 #define GEMV BLASFUNC(sbgemv)
+#elif defined(BFLOAT16_ONLY)
+#define ERROR_NAME "BGEMM "
+#undef GEMM_GEMV_FORWARD
 #else
 #define ERROR_NAME "SGEMM "
 #define GEMV BLASFUNC(sgemv)

param.h

@@ -1,5 +1,5 @@
 /*****************************************************************************
-Copyright (c) 2011-2023, The OpenBLAS Project
+Copyright (c) 2011-2023, 2025 The OpenBLAS Project
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
@@ -72,10 +72,17 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef PARAM_H
 #define PARAM_H
 
+#define BGEMM_DEFAULT_UNROLL_N 4
+#define BGEMM_DEFAULT_UNROLL_M 8
+#define BGEMM_DEFAULT_UNROLL_MN 32
+#define BGEMM_DEFAULT_P 256
+#define BGEMM_DEFAULT_R 256
+#define BGEMM_DEFAULT_Q 256
+#define BGEMM_ALIGN_K 1  // must be 2^x
 
 #define SBGEMM_DEFAULT_UNROLL_N 4
-#define SBGEMM_DEFAULT_UNROLL_M 8
-#define SBGEMM_DEFAULT_UNROLL_MN 32
+#define SBGEMM_DEFAULT_UNROLL_M 4
+#define SBGEMM_DEFAULT_UNROLL_MN 4
 #define SBGEMM_DEFAULT_P 256
 #define SBGEMM_DEFAULT_R 256
 #define SBGEMM_DEFAULT_Q 256
@@ -3556,6 +3563,13 @@ is a big desktop or server with abundant cache rather than a phone or embedded d
 #define GEMM_PREFERED_SIZE      8
 #endif
 
+#undef BGEMM_ALIGN_K
+#undef BGEMM_DEFAULT_UNROLL_M
+#undef BGEMM_DEFAULT_UNROLL_N
+#define BGEMM_ALIGN_K 8
+#define BGEMM_DEFAULT_UNROLL_M 4
+#define BGEMM_DEFAULT_UNROLL_N 4
+
 #undef SBGEMM_ALIGN_K
 #undef SBGEMM_DEFAULT_UNROLL_M
 #undef SBGEMM_DEFAULT_UNROLL_N