/*******************************************************************************
*
 * Copyright (c) 2013 - 2016, Freescale Semiconductor, Inc.
 * Copyright 2016-2021 NXP
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * o Redistributions of source code must retain the above copyright notice, this list
 *   of conditions and the following disclaimer.
 * o 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.
 *
 * o Neither the name of the copyright holder nor the names of its
 *   contributors may be used to endorse or promote products derived from this
 *   software without specific prior written permission.
 *
 * 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 HOLDER 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.
* 
*
****************************************************************************//*!
*
* @brief  Multiply negate accumulate with rounding
* 
*******************************************************************************/
#ifndef _MLIB_MNACRND_F16_ASM_H_
#define _MLIB_MNACRND_F16_ASM_H_

#if defined(__cplusplus)
extern "C" {
#endif

/*******************************************************************************
* Includes
*******************************************************************************/
#include "mlib_types.h"

/*******************************************************************************
* Macros
*******************************************************************************/
#define MLIB_MnacRndSat_F16_Asmi(f16Accum, f16Mult1, f16Mult2)                 \
        MLIB_MnacRndSat_F16_FAsmi(f16Accum, f16Mult1, f16Mult2)

/***************************************************************************//*!
*
* f16Out = - f16Accum + ( f16Mult1 * f16Mult2)
* With saturation
*******************************************************************************/
/* inline function without any optimization (compilation issue) */ 
RTCESL_INLINE_OPTIM_SAVE
RTCESL_INLINE_OPTIM_SET
static inline frac16_t MLIB_MnacRndSat_F16_FAsmi(register frac16_t f16Accum, 
                                                 register frac16_t f16Mult1, register frac16_t f16Mult2)
{
    #if defined(__CC_ARM)                                      /* For ARM Compiler */
        __asm volatile{ sxth f16Accum, f16Accum                /* Converts 16-bit input to 32-bit */
                        sxth f16Mult1, f16Mult1                /* Converts 16-bit input to 32-bit */
                        sxth f16Mult2, f16Mult2                /* Converts 16-bit input to 32-bit */
                        muls f16Mult1, f16Mult1, f16Mult2      /* f16Mult1 * f16Mult2 */
                        asrs f16Mult1, f16Mult1, #7            /* f16Mult1 >> 7 */
                        adds f16Mult1, f16Mult1, #128          /* Rounding */
                        asrs f16Mult1, f16Mult1, #8            /* f16Mult1 >> 8 */
                        subs f16Accum, f16Mult1, f16Accum      /* f16Mult1 * f16Mult2 - f16Accum*/
   
                        movs f16Mult1, #128                    /* f16Mult1 = 0x80 */
                        lsls f16Mult1, f16Mult1, #8            /* f16Mult1 = 0x8000 */
   
                        cmp f16Mult1, f16Accum                 /* Compares f16Accum with 0x8000 */
                        bgt NegTest                            /* If f16Accum < 0x8000, then goes to NegTest */
                        subs f16Accum, f16Mult1, #1            /* If f16Accum >= 0x8000, then f16Accum = 0x7FFF */
                        b SatEnd                               /* Goes to SatEnd */
                     NegTest:   
                        sxth f16Mult1, f16Mult1                /* f16Mult1 = 0xFFFF8000 */
                        cmp f16Mult1, f16Accum                 /* Compares f16Accum with 0xFFFF8000 */
                        ble SatEnd                             /* If f16Accum >= 0xFFFF8000, then goes to SatEnd */
                        mov f16Accum, f16Mult1                 /* If f16Accum < 0xFFFF8000, then f16Mult1 = 0xFFFF8000 */
                     SatEnd: };
    #elif defined(__GNUC__) && defined(__ARMCC_VERSION) 
        __asm volatile(
                        "sxth %0, %0 \n\t"                     /* Converts 16-bit input to 32-bit */
                        "sxth %1, %1 \n\t"                     /* Converts 16-bit input to 32-bit */
                        "sxth %2, %2 \n\t"                     /* Converts 16-bit input to 32-bit */
                        "muls %1, %1, %2 \n\t"                 /* f16Mult1 * f16Mult2 */
                        "asrs %1, %1, #7 \n\t"                 /* f16Mult1 >> 7 */
                        "adds %1, %1, #128 \n\t"               /* Rounding */
                        "asrs %1, %1, #8 \n\t"                 /* f16Mult1 >> 8 */
                        "subs %0, %1, %0 \n\t"                 /* f16Mult1 * f16Mult2 - f16Accum*/
 
                        "movs %1, #128 \n\t"                   /* f16Mult1 = 0x80 */
                        "lsls %1, %1, #8 \n\t"                 /* f16Mult1 = 0x8000 */
 
                        "cmp %1, %0 \n\t"                      /* Compares f16Accum with 0x8000 */
                        "bgt MLIB_MnacRndSat_F16_NegTest%= \n\t" /* If f16Accum < 0x8000, then jumps through two commands */
                        "subs %0, %1, #1 \n\t"                 /* If f16Accum >= 0x8000, then f16Accum = 0x7FFF */
                        "b MLIB_MnacRndSat_F16_SatEnd%= \n\t"    /* Jumps through four commands */
                     "MLIB_MnacRndSat_F16_NegTest%=: \n\t" 
                        "sxth %1, %1 \n\t"                     /* f16Mult1 = 0xFFFF8000 */
                        "cmp %1, %0 \n\t"                      /* Compares f16Accum with 0xFFFF8000 */
                        "ble MLIB_MnacRndSat_F16_SatEnd%= \n\t"  /* If f16Accum >= 0xFFFF8000, then jumps through next commands */
                        "mov %0, %1 \n\t"                      /* If f16Accum < 0xFFFF8000, then f16Accum = 0xFFFF8000 */
                    "MLIB_MnacRndSat_F16_SatEnd%=: \n\t"
                        : "+l"(f16Accum), "+l"(f16Mult1), "+l"(f16Mult2):);
    #else
        __asm volatile(
                        #if defined(__GNUC__)                  /* For GCC compiler */
                            ".syntax unified \n"               /* Using unified asm syntax */
                        #endif   
                        "sxth %0, %0 \n"                       /* Converts 16-bit input to 32-bit */
                        "sxth %1, %1 \n"                       /* Converts 16-bit input to 32-bit */
                        "sxth %2, %2 \n"                       /* Converts 16-bit input to 32-bit */
                        "muls %1, %1, %2 \n"                   /* f16Mult1 * f16Mult2 */
                        "asrs %1, %1, #7 \n"                   /* f16Mult1 >> 7 */
                        "adds %1, %1, #128 \n"                 /* Rounding */
                        "asrs %1, %1, #8 \n"                   /* f16Mult1 >> 8 */
                        "subs %0, %1, %0 \n"                   /* f16Mult1 * f16Mult2 - f16Accum*/
   
                        "movs %1, #128 \n"                     /* f16Mult1 = 0x80 */
                        "lsls %1, %1, #8 \n"                   /* f16Mult1 = 0x8000 */
   
                        "cmp %1, %0 \n"                        /* Compares f16Accum with 0x8000 */
                        "bgt .+6 \n"                           /* If f16Accum < 0x8000, then jumps through two commands */
                        "subs %0, %1, #1 \n"                   /* If f16Accum >= 0x8000, then f16Accum = 0x7FFF */
                        "b .+10 \n"                            /* Jumps through four commands */
                        "sxth %1, %1 \n"                       /* f16Mult1 = 0xFFFF8000 */
                        "cmp %1, %0 \n"                        /* Compares f16Accum with 0xFFFF8000 */
                        "ble .+4 \n"                           /* If f16Accum >= 0xFFFF8000, then jumps through next commands */
                        "mov %0, %1 \n"                        /* If f16Accum < 0xFFFF8000, then f16Accum = 0xFFFF8000 */
                        #if defined(__GNUC__)                  /* For GCC compiler */
                            ".syntax divided \n"
                        #endif
                        : "+l"(f16Accum), "+l"(f16Mult1), "+l"(f16Mult2):);
    #endif

    return f16Accum;
}
/* inline function without any optimization (compilation issue) */ 
RTCESL_INLINE_OPTIM_RESTORE 

#if defined(__cplusplus)
}
#endif

#endif /* _MLIB_MACRND_F16_ASM_H_ */  
