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a few loop optimisations.

--- a/libcelt/pitch.c

+++ b/libcelt/pitch.c

@@ -75,8 +75,10 @@

       }

       if (shift==0)

          return;

-      for (i=0;i<len;i++)

+      i=0;

+      do{

          x[i] = SHR16(x[i], shift);

+      } while (++i<len);

    } else {

       int shift=0;

       if (maxabs == 0)

@@ -89,8 +91,10 @@

       }

       if (shift==0)

          return;

-      for (i=0;i<len;i++)

+      i=0;

+      do{

          x[i] = SHL16(x[i], shift);

+      } while (++i<len);

    }

 }

 #else

--- a/libcelt/vq.c

+++ b/libcelt/vq.c

@@ -59,21 +59,21 @@

    /*for (i=0;i<N;i++)

    printf ("%d ", iy[i]);*/

    Rpp = 0;

-   for (i=0;i<N;i++)

+   i=0;

+   do {

       Rpp = MAC16_16(Rpp,P[i],P[i]);

-

-   for (i=0;i<N;i++)

       y[i] = SHL16(iy[i],yshift);

-   

+   } while (++i < N);

+

    Ryp = 0;

    Ryy = 0;

    /* If this doesn't generate a dual MAC (on supported archs), fire the compiler guy */

-   for (i=0;i<N;i++)

-   {

+   i=0;

+   do {

       Ryp = MAC16_16(Ryp, y[i], P[i]);

       Ryy = MAC16_16(Ryy, y[i], y[i]);

-   }

-   

+   } while (++i < N);

+

    /* g = (sqrt(Ryp^2 + Ryy - Rpp*Ryy)-Ryp)/Ryy */

    g = MULT16_32_Q15(

             celt_sqrt(MULT16_16(ROUND16(Ryp,14),ROUND16(Ryp,14)) + Ryy -

@@ -81,8 +81,11 @@

             - ROUND16(Ryp,14),

        celt_rcp(SHR32(Ryy,9)));

-   for (i=0;i<N;i++)

+   i=0;

+   do 

       X[i] = P[i] + ROUND16(MULT16_16(y[i], g),11);

+   while (++i < N);

+

    RESTORE_STACK;

 }

@@ -92,7 +95,7 @@

    VARDECL(celt_norm_t, y);

    VARDECL(int, iy);

    VARDECL(int, signx);

-   int i, j, is;

+   int j, is;

    celt_word16_t s;

    int pulsesLeft;

    celt_word32_t sum;