This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
How to get MIN_EXPR without using deprecated min operator
- From: "Michael Cieslinski" <micis at gmx dot de>
- To: gcc at gcc dot gnu dot org
- Date: Fri, 6 May 2005 11:56:31 +0200 (MEST)
- Subject: How to get MIN_EXPR without using deprecated min operator
Consider the following short program:
#include <algorithm>
void Tst1(short* __restrict__ SrcP, short* __restrict__ MinP, int Len)
{
for (int x=0; x<Len; x++)
MinP[x] = SrcP[x] <? MinP[x];
}
void Tst2(short* __restrict__ SrcP, short* __restrict__ MinP, int Len)
{
for (int x=0; x<Len; x++)
MinP[x] = std::min(SrcP[x], MinP[x]);
}
If I compile it with
gcc41 -O2 -ftree-vectorize -ftree-vectorizer-verbose=5
function Tst1 gets vectorized but Tst2 not.
The reason for this is <? results in a MIN_EXPR while std::min generates a
conditional code.
My question is, how can I get a MIN_EXPR without using the deprecated min <?
operator?
Michael Cieslinski