Hi Ted!
You wrote:
It was my (perhaps ignorant?) understanding that GCC3.2 closed the gap (at
least made the gap a lot smaller) between GCC and CCC. Am I wrong? (I have
yet to test this, however, as I don't have GCC3.2 working on my alpha.)
I'm not sure if the gap has become smaller, but ccc still generated code
that is a lot faster than gcc-3.2.
For example, take a look at these results from SCIbench
(http://math.nist.gov/scimark2), generated on an quadruple-proc EV67
machine (running Tru64 Unix btw, not Linux):
Compaq C compiler, V6.4-014
CFLAGS = -arch ev67 -fast -O4
| Composite Score: 195.47
| FFT Mflops: 207.66 (N=1024)
| SOR Mflops: 235.00 (100 x 100)
| MonteCarlo: Mflops: 53.33
| Sparse matmult Mflops: 177.93 (N=1000, nz=5000)
| LU Mflops: 303.42 (M=100, N=100)
GNU C compiler, V3.2.1
CFLAGS = -O3 -fomit-frame-pointer -ffast-math -mcpu=ev67
| Composite Score: 137.18
| FFT Mflops: 188.23 (N=1024)
| SOR Mflops: 167.08 (100 x 100)
| MonteCarlo: Mflops: 49.71
| Sparse matmult Mflops: 163.85 (N=1000, nz=5000)
| LU Mflops: 117.03 (M=100, N=100)