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changed from static function that wasn't inlining very well to a macro

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'make test' output:
### testing SNR for  1024 point FFTs
#### DOUBLE
snr_t2f = 295.70
snr_f2t = 308.53
#### FLOAT
snr_t2f = 146.91
snr_f2t = 143.58
#### SHORT
snr_t2f = 54.677
snr_f2t = 24.668

#### timing 10000 x 1024 point FFTs
#### DOUBLE
Elapsed:0:11.38 user:9.15 sys:0.24
#### FLOAT
Elapsed:0:04.18 user:3.39 sys:0.14
#### SHORT
Elapsed:0:06.03 user:4.75 sys:0.15
This commit is contained in:
Mark Borgerding 2003-10-11 22:41:17 +00:00
parent 11983e5056
commit 911d29d139
1 changed files with 1 additions and 5 deletions
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6
kiss_fft.c
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@ -37,10 +37,6 @@ typedef struct {
kiss_fft_cpx * scratch;
}kiss_fft_state;
#define C_ADD(x,a,b) \
do{ (x).r = (a).r+(b).r;\
(x).i = (a).i+(b).i;}while(0)
#ifdef FIXED_POINT
/* We don't have to worry about overflow from multiplying by twiddle factors since they
* all have unity magnitude. Still need to shift away fractional bits after adding 1/2 for
@ -121,7 +117,7 @@ void fft_work(
twidx += fstride * k;
if (twidx>=Norig)
twidx-=Norig;
t = cmul(scratch[q] , twiddles[twidx] );
C_MUL(t,scratch[q] , twiddles[twidx] );
Fout[ k ].r += t.r;
Fout[ k ].i += t.i;
}