fix generic gemm_beta for bgemm

kernel/generic/gemm_beta.c

@@ -72,7 +72,7 @@ f32tobfloat16(float f32)
 #endif
 
 
-int CNAME(BLASLONG m, BLASLONG n, BLASLONG dummy1, FLOAT beta,
+int CNAME(BLASLONG m, BLASLONG n, BLASLONG dummy1, FLOAT beta_in,
 	  IFLOAT *dummy2, BLASLONG dummy3, IFLOAT *dummy4, BLASLONG dummy5,
 	  FLOAT *c, BLASLONG ldc){
 
@@ -83,6 +83,8 @@ int CNAME(BLASLONG m, BLASLONG n, BLASLONG dummy1, FLOAT beta,
   c_offset = c;
   chunk = m >> 3;
   remain = m & 7;
+  float beta = BF16TOF32(beta_in);
+
   if (beta == ZERO){
 	  for(j=n; j>0; j--){
 		c_offset1 = c_offset;
@@ -108,18 +110,18 @@ int CNAME(BLASLONG m, BLASLONG n, BLASLONG dummy1, FLOAT beta,
 		c_offset1 = c_offset;
 		c_offset += ldc;
 		for(i=chunk; i>0; i--){
-			*(c_offset1 + 0) *= beta;
-			*(c_offset1 + 1) *= beta;
-			*(c_offset1 + 2) *= beta;
-			*(c_offset1 + 3) *= beta;
-			*(c_offset1 + 4) *= beta;
-			*(c_offset1 + 5) *= beta;
-			*(c_offset1 + 6) *= beta;
-			*(c_offset1 + 7) *= beta;
+			*(c_offset1 + 0) = F32TOBF16(beta * BF16TOF32(c_offset1[0]));
+			*(c_offset1 + 1) = F32TOBF16(beta * BF16TOF32(c_offset1[1]));
+			*(c_offset1 + 2) = F32TOBF16(beta * BF16TOF32(c_offset1[2]));
+			*(c_offset1 + 3) = F32TOBF16(beta * BF16TOF32(c_offset1[3]));
+			*(c_offset1 + 4) = F32TOBF16(beta * BF16TOF32(c_offset1[4]));
+			*(c_offset1 + 5) = F32TOBF16(beta * BF16TOF32(c_offset1[5]));
+			*(c_offset1 + 6) = F32TOBF16(beta * BF16TOF32(c_offset1[6]));
+			*(c_offset1 + 7) = F32TOBF16(beta * BF16TOF32(c_offset1[7]));
 			c_offset1 += 8;
 		}
 		for(i=remain; i>0; i--){
-			*c_offset1 *= beta;
+			*c_offset1 = F32TOBF16(beta * BF16TOF32(c_offset1[0]));
 			c_offset1 ++;
 		}
 	  }

kernel/setparam-ref.c

@@ -1,6 +1,6 @@
 /*********************************************************************/
 /* Copyright 2009, 2010 The University of Texas at Austin.           */
-/* Copyright 2023, 2025 The OpenBLAS Project.                              */
+/* Copyright 2023, 2025 The OpenBLAS Project.                        */
 /* All rights reserved.                                              */
 /*                                                                   */
 /* Redistribution and use in source and binary forms, with or        */