--- Tim Prince <tprince@xxxxxxxxxxxxx> wrote: > ranjith kumar wrote: > > 1) gcc manuals says -fprefetch-loop-arrays option > > inserts prefetch instructions automatically. > > Where can I get an example .c program for which > gcc > > inserts prefetching instruction. > > > > 2) Similarly to the autovectorization. > > Thanks in advance. > > > > > You might specify what target you are interested in. > As x86-64 targets > do better with hardware prefetch than software > prefetch, for the simple > cases, I don't find the latter so interesting. > There are test cases for -ftree-vectorize in the > testsuite, both in the > language parts and the tree-lang testsuite. > gfortran-4.3 does a > consistently good job on vectorization of the simple > cases. gcc > vectorizes effectively several of the gfortran > library functions, > including matmul. > 1)Where can I get test cases. I have searched in google. but it sucked. 2)The above two optimizations are done for C programs also. Am I right? 3)From which version of gcc they are enabled? ___________________________________________________________ New Yahoo! Mail is the ultimate force in competitive emailing. Find out more at the Yahoo! Mail Championships. Plus: play games and win prizes. http://uk.rd.yahoo.com/evt=44106/*http://mail.yahoo.net/uk
