Steve Kargl wrote:
# gfc4x 9.814 9.358 8.622 9.810 Note1 9.172 8.958 9.022
Column 5 compiled with -march=native -O2 -ffast-math
# Note 1: STOP DLAMC1 failure (10)
That's probably because a standard compile of the LAPACK sources only compiles {S|D}LAM* with -O0.
The code is simply not written for any higher optimization (i.e., it assumes the compiler more or less compiles it "literally").
Cheers, -- Toon Moene - e-mail: t...@moene.org - phone: +31 346 214290 Saturnushof 14, 3738 XG Maartensdijk, The Netherlands At home: http://moene.org/~toon/; weather: http://moene.org/~hirlam/ Progress of GNU Fortran: http://gcc.gnu.org/gcc-4.5/changes.html#Fortran
