Merge pull request OpenMathLib#4916 from martin-frbg/issue4901

Fix SIGILL/SIGSEGV in PPCG4 SGEMM and fix NAN handling in PPCG4 SSCAL/DSCAL

kernel/power/KERNEL.PPCG4

@@ -70,13 +70,13 @@ DSCALKERNEL	=  scal_ppc440.S
 CSCALKERNEL	= zscal_ppc440.S
 ZSCALKERNEL	= zscal_ppc440.S
 
-SGEMMKERNEL    =  gemm_kernel_altivec_g4.S
-SGEMMINCOPY    =  ../generic/gemm_ncopy_16.c
-SGEMMITCOPY    =  ../generic/gemm_tcopy_16.c
+SGEMMKERNEL    =  gemm_kernel_g4.S
+SGEMMINCOPY    = 
+SGEMMITCOPY    = 
 SGEMMONCOPY    =  gemm_ncopy_4.S
 SGEMMOTCOPY    =  gemm_tcopy_4.S
-SGEMMINCOPYOBJ =  sgemm_incopy$(TSUFFIX).$(SUFFIX)
-SGEMMITCOPYOBJ =  sgemm_itcopy$(TSUFFIX).$(SUFFIX)
+SGEMMINCOPYOBJ = 
+SGEMMITCOPYOBJ = 
 SGEMMONCOPYOBJ =  sgemm_oncopy$(TSUFFIX).$(SUFFIX)
 SGEMMOTCOPYOBJ =  sgemm_otcopy$(TSUFFIX).$(SUFFIX)
 DGEMMKERNEL    =  gemm_kernel_g4.S

param.h

@@ -2243,7 +2243,7 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define GEMM_DEFAULT_OFFSET_B 1024
 #define GEMM_DEFAULT_ALIGN 0x0ffffUL
 
-#define SGEMM_DEFAULT_UNROLL_M 16
+#define SGEMM_DEFAULT_UNROLL_M 4
 #define SGEMM_DEFAULT_UNROLL_N 4
 #define DGEMM_DEFAULT_UNROLL_M 4
 #define DGEMM_DEFAULT_UNROLL_N 4