Merge pull request #2301 from martin-frbg/ppc8be

Disable IDAMIN/MAX and IZAMIN/MAX optimizations on big-endian POWER8

Author: martin-frbg

kernel/power/idamax.c

@@ -324,14 +324,15 @@ BLASLONG CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x) {
 
     if (inc_x == 1) {
 
+#if defined(_CALL_ELF) && (_CALL_ELF == 2)
         BLASLONG n1 = n & -32;
         if (n1 > 0) {
 
             max = diamax_kernel_32(n1, x, &maxf);
 
             i = n1;
         }
-
+#endif
         while (i < n) {
             if (ABS(x[i]) > maxf) {
                 max = i;

kernel/power/idamin.c

@@ -326,13 +326,15 @@ BLASLONG CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x) {
     minf = ABS(x[0]); //index's not incremented
     if (inc_x == 1) {
 
+#if defined(_CALL_ELF) && (_CALL_ELF == 2)
         BLASLONG n1 = n & -32;
         if (n1 > 0) {
 
             min = diamin_kernel_32(n1, x, &minf);
             i = n1;
         }
-
+#endif
+ 
         while (i < n) {
             if (ABS(x[i]) < minf) {
                 min = i;

kernel/power/izamax.c

@@ -316,13 +316,15 @@ BLASLONG CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x)
 
     if (inc_x == 1) {
 
+#if defined(_CALL_ELF) && (_CALL_ELF == 2)
       BLASLONG n1 = n & -16;
       if (n1 > 0) {
 
             max = ziamax_kernel_16(n1, x, &maxf); 
             i = n1;
             ix = n1 << 1;
       }
+#endif
 
       while(i < n)
     {

kernel/power/izamin.c

@@ -314,14 +314,16 @@ BLASLONG CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x)
 
     if (inc_x == 1) {
         minf = CABS1(x,0); //index will not be incremented
+
+#if defined(_CALL_ELF) && (_CALL_ELF == 2)
         BLASLONG n1 = n & -16;
         if (n1 > 0) {
 
             min = ziamin_kernel_16_TUNED(n1, x, &minf);
             i = n1;
             ix = n1 << 1;
         }
-      
+#endif      
 
         while(i < n)
         {