handle incx < 0

Author: martin-frbg

kernel/riscv64/nrm2_vector.c

@@ -104,7 +104,7 @@ FLOAT CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x)
 {
 	BLASLONG i=0;
 
-	if (n <= 0 || inc_x <= 0) return(0.0);
+	if (n <= 0 || inc_x == 0) return(0.0);
         if(n == 1) return (ABS(x[0]));
 
         unsigned int gvl = 0;
@@ -193,7 +193,7 @@ FLOAT CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x)
         //finish any tail using scalar ops
         i*=gvl*inc_x;
         n*=inc_x;
-        while(i < n){
+        while(abs(i) < abs(n)){
                 if ( x[i] != 0.0 ){
                         FLOAT absxi = ABS( x[i] );
                         if ( scale < absxi ){