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  /external/webrtc/src/common_audio/signal_processing/
spl_sqrt.c 25 WebRtc_Word16 x_half, t16; local
31 x_half=x/2^31
32 t = 1 + (x_half) - 0.5*((x_half)^2) + 0.5*((x_half)^3) - 0.625*((x_half)^4)
33 + 0.875*((x_half)^5)
40 x_half = (WebRtc_Word16)WEBRTC_SPL_RSHIFT_W32(B, 16);// x_half = x/2 = (in-1)/2
44 x2 = ((WebRtc_Word32)x_half) * ((WebRtc_Word32)x_half) * 2; // A = (x/2)^
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