77             float s1_im     = src_im[0] - src_im[1];  in small_direct_fft()  local
87             dst_im[1]       = s1_im - s3_re;  in small_direct_fft()
89             dst_im[3]       = s1_im + s3_re;  in small_direct_fft()
96             float s1_im     = src_im[1];  in small_direct_fft()  local
98             dst_im[1]       = src_im[0] - s1_im;  in small_direct_fft()
100             dst_im[0]       = src_im[0] + s1_im;  in small_direct_fft()
119             float s1_im     = src_im[0] - src_im[1];  in small_reverse_fft()  local
129             dst_im[1]       = s1_im - s3_re;  in small_reverse_fft()
131             dst_im[3]       = s1_im + s3_re;  in small_reverse_fft()
138             float s1_im     = src_im[1];  in small_reverse_fft()  local
140             dst_im[1]       = src_im[0] - s1_im;  in small_reverse_fft()
142             dst_im[0]       = src_im[0] + s1_im;  in small_reverse_fft()