[Opus] Update to v1.2.1

third_party/opus/src/celt/fixed_c5x.h

-/* Copyright (c) 2015 Xiph.Org Foundation
-   Written by Viswanath Puttagunta */
+/* Copyright (C) 2003 Jean-Marc Valin */
 /**
-   @file fft_arm.h
-   @brief ARM Neon Intrinsic optimizations for fft using NE10 library
- */
-
+   @file fixed_c5x.h
+   @brief Fixed-point operations for the TI C5x DSP family
+*/
 /*
    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions
    are met:
 
    - Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.
 
    - Redistributions in binary form must reproduce the above copyright
    notice, this list of conditions and the following disclaimer in the
    documentation and/or other materials provided with the distribution.
 
    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
    OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
+#ifndef FIXED_C5X_H
+#define FIXED_C5X_H
 
-#if !defined(FFT_ARM_H)
-#define FFT_ARM_H
+#include "dsplib.h"
 
-#include "config.h"
-#include "kiss_fft.h"
+#undef IMUL32
+static OPUS_INLINE long IMUL32(long i, long j)
+{
+   long ac0, ac1;
+   ac0 = _lmpy(i>>16,j);
+   ac1 = ac0 + _lmpy(i,j>>16);
+   return _lmpyu(i,j) + (ac1<<16);
+}
 
-#if defined(HAVE_ARM_NE10)
+#undef MAX16
+#define MAX16(a,b) _max(a,b)
 
-int opus_fft_alloc_arm_neon(kiss_fft_state *st);
-void opus_fft_free_arm_neon(kiss_fft_state *st);
+#undef MIN16
+#define MIN16(a,b) _min(a,b)
 
-void opus_fft_neon(const kiss_fft_state *st,
-                   const kiss_fft_cpx *fin,
-                   kiss_fft_cpx *fout);
+#undef MAX32
+#define MAX32(a,b) _lmax(a,b)
 
-void opus_ifft_neon(const kiss_fft_state *st,
-                    const kiss_fft_cpx *fin,
-                    kiss_fft_cpx *fout);
+#undef MIN32
+#define MIN32(a,b) _lmin(a,b)
 
-#if !defined(OPUS_HAVE_RTCD)
-#define OVERRIDE_OPUS_FFT (1)
+#undef VSHR32
+#define VSHR32(a, shift) _lshl(a,-(shift))
 
-#define opus_fft_alloc_arch(_st, arch) \
-   ((void)(arch), opus_fft_alloc_arm_neon(_st))
+#undef MULT16_16_Q15
+#define MULT16_16_Q15(a,b) (_smpy(a,b))
 
-#define opus_fft_free_arch(_st, arch) \
-   ((void)(arch), opus_fft_free_arm_neon(_st))
+#undef MULT16_16SU
+#define MULT16_16SU(a,b) _lmpysu(a,b)
 
-#define opus_fft(_st, _fin, _fout, arch) \
-   ((void)(arch), opus_fft_neon(_st, _fin, _fout))
+#undef MULT_16_16
+#define MULT_16_16(a,b) _lmpy(a,b)
 
-#define opus_ifft(_st, _fin, _fout, arch) \
-   ((void)(arch), opus_ifft_neon(_st, _fin, _fout))
+/* FIXME: This is technically incorrect and is bound to cause problems. Is there any cleaner solution? */
+#undef MULT16_32_Q15
+#define MULT16_32_Q15(a,b) ADD32(SHL(MULT16_16((a),SHR((b),16)),1), SHR(MULT16_16SU((a),(b)),15))
 
-#endif /* OPUS_HAVE_RTCD */
+#define celt_ilog2(x) (30 - _lnorm(x))
+#define OVERRIDE_CELT_ILOG2
 
-#endif /* HAVE_ARM_NE10 */
+#define celt_maxabs16(x, len) MAX32(EXTEND32(maxval((DATA *)x, len)),-EXTEND32(minval((DATA *)x, len)))
+#define OVERRIDE_CELT_MAXABS16
 
-#endif
+#endif /* FIXED_C5X_H */