Update to opus-HEAD-66611f1.

celt/fixed_debug.h

 /* Copyright (C) 2003-2008 Jean-Marc Valin
    Copyright (C) 2007-2012 Xiph.Org Foundation */
 /**
    @file fixed_debug.h
    @brief Fixed-point operations with debugging
 */
 /*
    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions
    are met:
@@ skipping 478 matching lines @@
    }
    if (Q==15)
       celt_mips+=4;
    else
       celt_mips+=5;
    return res;
 }
 
 #define MULT16_32_Q15(a,b) MULT16_32_QX(a,b,15)
 #define MAC16_32_Q15(c,a,b) (celt_mips-=2,ADD32((c),MULT16_32_Q15((a),(b))))
+#define MAC16_32_Q16(c,a,b) (celt_mips-=2,ADD32((c),MULT16_32_Q16((a),(b))))
 
 static OPUS_INLINE int SATURATE(int a, int b)
 {
    if (a>b)
       a=b;
    if (a<-b)
       a = -b;
    celt_mips+=3;
    return a;
 }
@@ skipping 251 matching lines @@
    {
       fprintf (stderr, "DIV32: output is not int: %d in %s: line %d\n", (int)res, file, line);
 #ifdef FIXED_DEBUG_ASSERT
       celt_assert(0);
 #endif
    }
    celt_mips+=70;
    return res;
 }
 
+static OPUS_INLINE opus_val16 SIG2WORD16_generic(celt_sig x)
+{
+   x = PSHR32(x, SIG_SHIFT);
+   x = MAX32(x, -32768);
+   x = MIN32(x, 32767);
+   return EXTRACT16(x);
+}
+#define SIG2WORD16(x) (SIG2WORD16_generic(x))
+
+
 #undef PRINT_MIPS
 #define PRINT_MIPS(file) do {fprintf (file, "total complexity = %llu MIPS\n", celt_mips);} while (0);
 
 #endif