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                        (C) Copyright Fraunhofer IIS (2006)
                               All Rights Reserved

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    between Google Inc. and  Fraunhofer
    effective and in full force since March 1, 2012.

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    conditions described in the above mentioned Fraunhofer IIS Software
    Evaluation Agreement. Any other and/or further use requires a separate agreement.


   $Id$
   Author(s):
   Description: fixed point intrinsics

   This software and/or program is protected by copyright law and international
   treaties. Any reproduction or distribution of this software and/or program,
   or any portion of it, may result in severe civil and criminal penalties, and
   will be prosecuted to the maximum extent possible under law.

******************************************************************************/


#if defined(__arm__) && defined(__GNUC__)	/* cppp replaced: elif */

#if defined(__ARM_ARCH_5TE__) || defined(__ARM_ARCH_6__)
  #define FUNCTION_cplxMultDiv2_32x16
  #define FUNCTION_cplxMultDiv2_32x16X2
  //#define FUNCTION_cplxMult_32x16
  //#define FUNCTION_cplxMult_32x16X2
#endif

#define FUNCTION_cplxMultDiv2_32x32X2
//#define FUNCTION_cplxMult_32x32X2

#ifdef FUNCTION_cplxMultDiv2_32x16
inline void cplxMultDiv2( FIXP_DBL *c_Re,
                          FIXP_DBL *c_Im,
                          const FIXP_DBL a_Re,
                          const FIXP_DBL a_Im,
                          const FIXP_SPK wpk )
{
   LONG tmp1,tmp2;
   const LONG w = wpk.w;

   asm("smulwt %0, %3, %4;\n"
       "rsb %1,%0,#0;\n"
       "smlawb %0, %2, %4, %1;\n"
       "smulwt %1, %2, %4;\n"
       "smlawb %1, %3, %4, %1;\n"
       : "=&r"(tmp1), "=&r"(tmp2)
       : "r"(a_Re), "r"(a_Im), "r"(w)
       );

    *c_Re = tmp1;
    *c_Im = tmp2;
}
#endif /* FUNCTION_cplxMultDiv2_32x16 */

#ifdef FUNCTION_cplxMultDiv2_32x16X2
inline void cplxMultDiv2( FIXP_DBL *c_Re,
                          FIXP_DBL *c_Im,
                          const FIXP_DBL a_Re,
                          const FIXP_DBL a_Im,
                          const FIXP_SGL b_Re,
                          const FIXP_SGL b_Im)
{
    LONG tmp1, tmp2;

    asm("smulwb %0, %3, %5;\n"     /* %7   = -a_Im * b_Im */
        "rsb %1,%0,#0;\n"
        "smlawb %0, %2, %4, %1;\n" /* tmp1 =  a_Re * b_Re - a_Im * b_Im */
        "smulwb %1, %2, %5;\n"     /* %7   =  a_Re * b_Im */
        "smlawb %1, %3, %4, %1;\n" /* tmp2 =  a_Im * b_Re + a_Re * b_Im */
        : "=&r"(tmp1), "=&r"(tmp2)
        : "r"(a_Re), "r"(a_Im), "r"(b_Re), "r"(b_Im)
        );

     *c_Re = tmp1;
     *c_Im = tmp2;
}
#endif /* FUNCTION_cplxMultDiv2_32x16X2 */

#ifdef FUNCTION_cplxMultAddDiv2_32x16X2
inline void cplxMultAddDiv2( FIXP_DBL *c_Re,
                             FIXP_DBL *c_Im,
                             const FIXP_DBL  a_Re,
                             const FIXP_DBL  a_Im,
                             const FIXP_SGL b_Re,
                             const FIXP_SGL b_Im)
{
    LONG tmp1, tmp2;

    asm("smulwb %0, %3, %5;\n"
        "rsb %1,%0,#0;\n"
        "smlawb %0, %2, %4, %1;\n"
        "smulwb %1, %2, %5;\n"
        "smlawb %1, %3, %4, %1;\n"
        : "=&r"(tmp1), "=&r"(tmp2)
        : "r"(a_Re), "r"(a_Im), "r"(b_Re), "r"(b_Im)
        );

     *c_Re += tmp1;
     *c_Im += tmp2;
}
#endif /* FUNCTION_cplxMultAddDiv2_32x16X2 */


#ifdef FUNCTION_cplxMultDiv2_32x32X2
inline void cplxMultDiv2( FIXP_DBL *c_Re,
                          FIXP_DBL *c_Im,
                          const FIXP_DBL a_Re,
                          const FIXP_DBL a_Im,
                          const FIXP_DBL b_Re,
                          const FIXP_DBL b_Im)
{
    LONG tmp1, tmp2;

#ifdef __ARM_ARCH_6__
    asm(
       "smmul %0, %2, %4;\n"     /* tmp1  = a_Re * b_Re */
       "smmls %0, %3, %5, %0;\n" /* tmp1 -= a_Im * b_Im */
       "smmul %1, %2, %5;\n"     /* tmp2  = a_Re * b_Im */
       "smmla %1, %3, %4, %1;\n" /* tmp2 += a_Im * b_Re */
       : "=&r"(tmp1), "=&r"(tmp2)
       : "r"(a_Re), "r"(a_Im), "r"(b_Re), "r"(b_Im)
       : "r0"
       );
#else
    LONG discard;
    asm(
       "smull %2, %0, %7, %6;\n" /* tmp1  = -a_Im * b_Im */
       "smlal %2, %0, %3, %5;\n" /* tmp1 +=  a_Re * b_Re */
       "smull %2, %1, %3, %6;\n" /* tmp2  =  a_Re * b_Im */
       "smlal %2, %1, %4, %5;\n" /* tmp2 +=  a_Im * b_Re */
       : "=&r"(tmp1), "=&r"(tmp2), "=&r"(discard)
       : "r"(a_Re), "r"(a_Im), "r"(b_Re), "r"(b_Im), "r"(-a_Im)
       );
 #endif
    *c_Re = tmp1;
    *c_Im = tmp2;
}
#endif /* FUNCTION_cplxMultDiv2_32x32X2 */


#endif