Can this loop be vectorized?

[Wolfgang Thomsen]

Hello,

is there a way to convince the Intel compiler to (auto-)vectorize the
following?

double a[N], b[N];
int c[2N];

for(int i=0; i<N; i++) {
a[i] = b[c[i*2]];
}

It does not vectorize presumably because c[] is a different data type than
a[] and b[].

Any help greatly appreciated!
Wolf

[دريد عبد الله‎]

Or why don't you type:

[Jeff Schwab]

Are my eyes failing in my old age, or is that identical to the OP's code
except for the addition of two blank lines? What is that supposed to
accomplish?

[دريد عبد الله‎]

Sory For Mistake
Tyy To Type:

double a[N], b[N];
int c[2N];

for(int i=0; i<N; i++) {

tmp = c[i*2]; // All now are integers
a[i] = b[tmp];

}
Please try this..
But for knowing
I tryed your code on turbo c++ 4.5 . It was running..

[red floyd]

That wasn't what OP was asking. To the OP, you're better off asking in
a group dedicated to your compiler -- ISO/IEC 14882:2003 doesn't discuss
vectorization at all.