undo slow dgemm/skylake microoptimization
the compare is more costly than the work
@@ -647,11 +647,9 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#define SAVE2x2(ALPHA) \
- if (ALPHA != 1.0) { \
xmm0 = _mm_set1_pd(ALPHA); \
xmm4 *= xmm0; \
xmm6 *= xmm0; \
- } \
\
xmm4 += _mm_loadu_pd(CO1); \
xmm6 += _mm_loadu_pd(CO1 + ldc); \
