gcc -mpowerpc -O3 -pipe -mcpu=G4 -mtune=G4 -maltivec -m32 -mfloat-gprs=double -malign-power -mabi=altivec -mspe=yes -mhard-float -mfull-toc -DUNIX flops.c -o flops-full

PowerPC 4774a 1.67Ghz
-----------------------------------------------------------

   FLOPS C Program (Double Precision), V2.0 18 Dec 1992

   Module     Error        RunTime      MFLOPS
                            (usec)
     1      4.0146e-13      0.0355    394.6099
     2     -1.4166e-13      0.0259    270.7092
     3      4.7184e-14      0.0265    642.4068
     4     -1.2546e-13      0.0391    383.7584
     5     -1.3800e-13      0.0631    459.2950
     6      3.2374e-13      0.0421    688.9215
     7     -8.4583e-11      0.0908    132.1522
     8      3.4855e-13      0.0451    665.1582

   Iterations      =  512000000
   NullTime (usec) =     0.0012
   MFLOPS(1)       =   333.8619
   MFLOPS(2)       =   266.9098
   MFLOPS(3)       =   426.6890
   MFLOPS(4)       =   595.7567