search for: vmul_f32

...); + scratch_2[1] = vadd_f32(Fout_2[1], Fout_2[3]); + Fout_2[2] = vsub_f32(Fout_2[0], scratch_2[1]); + Fout_2[0] = vadd_f32(Fout_2[0], scratch_2[1]); + scratch_2[1] = vsub_f32(Fout_2[1], Fout_2[3]); + + scratch_2[1] = vrev64_f32(scratch_2[1]); + /* scratch_2[1] *= (1, -1) */ + scratch_2[1] = vmul_f32(scratch_2[1], ones_2); + Fout_2[1] = vadd_f32(scratch_2[0], scratch_2[1]); + + /* scratch_2[1] *= (-1, -1) */ + scratch_2[1] = vmul_f32(scratch_2[1], minusones_2); + Fout_2[3] = vadd_f32(scratch_2[0], scratch_2[1]); + + Fout_4[0] = vcombine_f32(Fout_2[0], Fout_2[1]); + Fout_4[1] = vcombine_f3...

Hello, This patch introduces ARM NEON Intrinsics to optimize kf_bfly4 routine in celt part of libopus. Using NEON optimized kf_bfly4(_neon) routine helped improve performance of opus_fft_impl function by about 21.4%. The end use case was decoding a music opus ogg file. The end use case saw performance improvement of about 4.47%. This patch has 2 components i. Actual neon code to improve