@@ -246,21 +246,16 @@ static void fft4(FFTComplex *z)

 static void fft8(FFTComplex *z)

 {

-    FFTDouble t1, t2, t3, t4, t5, t6, t7, t8;

+    FFTDouble t1, t2, t3, t4, t5, t6;

     fft4(z);

     BF(t1, z[5].re, z[4].re, -z[5].re);

     BF(t2, z[5].im, z[4].im, -z[5].im);

-    BF(t3, z[7].re, z[6].re, -z[7].re);

-    BF(t4, z[7].im, z[6].im, -z[7].im);

-    BF(t8, t1, t3, t1);

-    BF(t7, t2, t2, t4);

-    BF(z[4].re, z[0].re, z[0].re, t1);

-    BF(z[4].im, z[0].im, z[0].im, t2);

-    BF(z[6].re, z[2].re, z[2].re, t7);

-    BF(z[6].im, z[2].im, z[2].im, t8);

+    BF(t5, z[7].re, z[6].re, -z[7].re);

+    BF(t6, z[7].im, z[6].im, -z[7].im);

+    BUTTERFLIES(z[0],z[2],z[4],z[6]);

     TRANSFORM(z[1],z[3],z[5],z[7],sqrthalf,sqrthalf);

 }