benchdnn: fix scales and bias order in brgemm reference

test coverage extended

Author: akharito

tests/benchdnn/brgemm/ref_brgemm.cpp

@@ -1,5 +1,5 @@
 /*******************************************************************************
-* Copyright 2022 Intel Corporation
+* Copyright 2022-2023 Intel Corporation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
@@ -92,12 +92,12 @@ void compute_ref_brgemm(const prb_t *prb, const args_t &args) {
         float &dst = ((float *)dst_m)[dst_off];
 
         float tmp = ((float *)dst_tmp)[dst_off];
+        maybe_scale(prb->attr, tmp, prb->scales, n, attr_scale_arg);
         if (prb->bia_dt != dnnl_data_type_undef) {
             int64_t bia_off = dst_m.get_scale_idx(dst_off, bias_broadcast_mask);
             float *bia_ptr = (float *)bia_m;
             tmp += bia_ptr[bia_off];
         }
-        maybe_scale(prb->attr, tmp, prb->scales, n, attr_scale_arg);
 
         const auto v_po_vals
                 = prepare_po_vals(dst_m, args, v_po_masks, dst_off);

tests/benchdnn/inputs/brgemm/test_brgemm_int8

@@ -47,3 +47,13 @@
 --attr-scales=,src:common:0.5*,wei:per_oc:2*,src:common:0.5*+wei:per_oc:4*
 --attr-zero-points=,src:common:-2*,src:common:128*+dst:common:-1*
 --batch=option_set_int8
+
+## Limited full stack check
+--reset
+--brgemm-attr=,use_uker:1
+--dt=s8:s8:s8
+--attr-post-ops=sum:2+relu
+--attr-scales=src:common:0.5*+wei:per_oc:4*
+--attr-zero-points=,src:common:128*+dst:common:-1*
+--bia_dt=f32,s8
+--batch=option_set_int8