X-Git-Url: https://git.xiph.org/?p=opus.git;a=blobdiff_plain;f=celt%2Fmathops.h;h=44fa97c69751570143fb11c4802827083706b653;hp=18a66be165240f0ebce7100dbe3fc39e2313f644;hb=36a21ed53636ed4471aa62a8d06dcf175d6ff395;hpb=b7bd4c20acfd951ba46647e07411285997d952f4

diff --git a/celt/mathops.h b/celt/mathops.h
index 18a66be1..44fa97c6 100644
--- a/celt/mathops.h
+++ b/celt/mathops.h
@@ -190,6 +190,13 @@ static inline opus_val16 celt_log2(opus_val32 x)
 #define D1 22804
 #define D2 14819
 #define D3 10204
+
+static inline opus_val32 celt_exp2_frac(opus_val16 x)
+{
+   opus_val16 frac;
+   frac = SHL16(x, 4);
+   return ADD16(D0, MULT16_16_Q15(frac, ADD16(D1, MULT16_16_Q15(frac, ADD16(D2 , MULT16_16_Q15(D3,frac))))));
+}
 /** Base-2 exponential approximation (2^x). (Q10 input, Q16 output) */
 static inline opus_val32 celt_exp2(opus_val16 x)
 {
@@ -200,8 +207,7 @@ static inline opus_val32 celt_exp2(opus_val16 x)
       return 0x7f000000;
    else if (integer < -15)
       return 0;
-   frac = SHL16(x-SHL16(integer,10),4);
-   frac = ADD16(D0, MULT16_16_Q15(frac, ADD16(D1, MULT16_16_Q15(frac, ADD16(D2 , MULT16_16_Q15(D3,frac))))));
+   frac = celt_exp2_frac(x-SHL16(integer,10));
    return VSHR32(EXTEND32(frac), -integer-2);
 }