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moved scratch buffer to stack variable

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Mark Borgerding 2003-11-01 03:59:43 +00:00
parent 28551899e2
commit 7b7aefe7c4
1 changed files with 5 additions and 5 deletions
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10
kiss_fft.c
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@ -176,7 +176,7 @@ void bfly3(
{ {
kiss_fft_cpx *Fout0,*Fout1,*Fout2; kiss_fft_cpx *Fout0,*Fout1,*Fout2;
kiss_fft_cpx *tw1,*tw2; kiss_fft_cpx *tw1,*tw2;
kiss_fft_cpx * scratch = st->scratch; kiss_fft_cpx scratch[5];
kiss_fft_cpx epi3; kiss_fft_cpx epi3;
epi3 = st->twiddles[fstride*m]; epi3 = st->twiddles[fstride*m];
@ -191,15 +191,15 @@ void bfly3(
C_MUL(scratch[1],*Fout1 , *tw1); C_MUL(scratch[1],*Fout1 , *tw1);
C_MUL(scratch[2],*Fout2 , *tw2); C_MUL(scratch[2],*Fout2 , *tw2);
C_ADD(scratch[4],scratch[1],scratch[2]); C_ADD(scratch[3],scratch[1],scratch[2]);
C_SUB(scratch[0],scratch[1],scratch[2]); C_SUB(scratch[0],scratch[1],scratch[2]);
Fout1->r = Fout0->r - scratch[4].r/2; Fout1->r = Fout0->r - scratch[3].r/2;
Fout1->i = Fout0->i - scratch[4].i/2; Fout1->i = Fout0->i - scratch[3].i/2;
C_MULBYSCALAR( scratch[0] , epi3.i ); C_MULBYSCALAR( scratch[0] , epi3.i );
C_ADDTO(*Fout0,scratch[4]); C_ADDTO(*Fout0,scratch[3]);
Fout2->r = Fout1->r + scratch[0].i; Fout2->r = Fout1->r + scratch[0].i;
Fout2->i = Fout1->i - scratch[0].r; Fout2->i = Fout1->i - scratch[0].r;