Diff: cmsis_dsp/BasicMathFunctions/arm_sub_q31.c

Revision:

5:a912b042151f

Parent:

4:9cee975aadce

diff -r 9cee975aadce -r a912b042151f cmsis_dsp/BasicMathFunctions/arm_sub_q31.c
--- a/cmsis_dsp/BasicMathFunctions/arm_sub_q31.c	Mon Jun 23 09:30:09 2014 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,146 +0,0 @@
-/* ----------------------------------------------------------------------    
-* Copyright (C) 2010-2013 ARM Limited. All rights reserved.    
-*    
-* $Date:        17. January 2013
-* $Revision: 	V1.4.1
-*    
-* Project: 	    CMSIS DSP Library    
-* Title:		arm_sub_q31.c    
-*    
-* Description:	Q31 vector subtraction.    
-*    
-* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
-*  
-* 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.
-*   - Neither the name of ARM LIMITED 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 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.
-* -------------------------------------------------------------------- */
-
-#include "arm_math.h"
-
-/**    
- * @ingroup groupMath    
- */
-
-/**    
- * @addtogroup BasicSub    
- * @{    
- */
-
-/**    
- * @brief Q31 vector subtraction.    
- * @param[in]       *pSrcA points to the first input vector    
- * @param[in]       *pSrcB points to the second input vector    
- * @param[out]      *pDst points to the output vector    
- * @param[in]       blockSize number of samples in each vector    
- * @return none.    
- *    
- * <b>Scaling and Overflow Behavior:</b>    
- * \par    
- * The function uses saturating arithmetic.    
- * Results outside of the allowable Q31 range [0x80000000 0x7FFFFFFF] will be saturated.    
- */
-
-void arm_sub_q31(
-  q31_t * pSrcA,
-  q31_t * pSrcB,
-  q31_t * pDst,
-  uint32_t blockSize)
-{
-  uint32_t blkCnt;                               /* loop counter */
-
-
-#ifndef ARM_MATH_CM0_FAMILY
-
-/* Run the below code for Cortex-M4 and Cortex-M3 */
-  q31_t inA1, inA2, inA3, inA4;
-  q31_t inB1, inB2, inB3, inB4;
-
-  /*loop Unrolling */
-  blkCnt = blockSize >> 2u;
-
-  /* First part of the processing with loop unrolling.  Compute 4 outputs at a time.    
-   ** a second loop below computes the remaining 1 to 3 samples. */
-  while(blkCnt > 0u)
-  {
-    /* C = A - B */
-    /* Subtract and then store the results in the destination buffer. */
-    inA1 = *pSrcA++;
-    inA2 = *pSrcA++;
-    inB1 = *pSrcB++;
-    inB2 = *pSrcB++;
-
-    inA3 = *pSrcA++;
-    inA4 = *pSrcA++;
-    inB3 = *pSrcB++;
-    inB4 = *pSrcB++;
-
-    *pDst++ = __QSUB(inA1, inB1);
-    *pDst++ = __QSUB(inA2, inB2);
-    *pDst++ = __QSUB(inA3, inB3);
-    *pDst++ = __QSUB(inA4, inB4);
-
-    /* Decrement the loop counter */
-    blkCnt--;
-  }
-
-  /* If the blockSize is not a multiple of 4, compute any remaining output samples here.    
-   ** No loop unrolling is used. */
-  blkCnt = blockSize % 0x4u;
-
-  while(blkCnt > 0u)
-  {
-    /* C = A - B */
-    /* Subtract and then store the result in the destination buffer. */
-    *pDst++ = __QSUB(*pSrcA++, *pSrcB++);
-
-    /* Decrement the loop counter */
-    blkCnt--;
-  }
-
-#else
-
-  /* Run the below code for Cortex-M0 */
-
-  /* Initialize blkCnt with number of samples */
-  blkCnt = blockSize;
-
-  while(blkCnt > 0u)
-  {
-    /* C = A - B */
-    /* Subtract and then store the result in the destination buffer. */
-    *pDst++ = (q31_t) clip_q63_to_q31((q63_t) * pSrcA++ - *pSrcB++);
-
-    /* Decrement the loop counter */
-    blkCnt--;
-  }
-
-#endif /* #ifndef ARM_MATH_CM0_FAMILY */
-
-}
-
-/**    
- * @} end of BasicSub group    
- */