Single-CPU benchmark on Cray X1
Remarks:
- mod1d  : The part in which bank read conflicts are measured is
           (incorrectly) optimized by cutting out the repeat
	   iterations, causing nonsensical speeds of 10^6--10^7 Mflop/s.
- mod1f  : A floating-point exception occurs for unkown reasons
           (the same tests are performed as in program 'mod1e' where
	   all results are complete and correct).
