Diff: cmsis_dsp/BasicMathFunctions/arm_scale_f32.c

Revision:

5:a912b042151f

Parent:

4:9cee975aadce

--- a/cmsis_dsp/BasicMathFunctions/arm_scale_f32.c	Mon Jun 23 09:30:09 2014 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,169 +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_scale_f32.c    
-*    
-* Description:	Multiplies a floating-point vector by a scalar.    
-*    
-* 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        
- */
-
-/**        
- * @defgroup scale Vector Scale        
- *        
- * Multiply a vector by a scalar value.  For floating-point data, the algorithm used is:        
- *        
- * <pre>        
- *     pDst[n] = pSrc[n] * scale,   0 <= n < blockSize.        
- * </pre>        
- *        
- * In the fixed-point Q7, Q15, and Q31 functions, <code>scale</code> is represented by        
- * a fractional multiplication <code>scaleFract</code> and an arithmetic shift <code>shift</code>.        
- * The shift allows the gain of the scaling operation to exceed 1.0.        
- * The algorithm used with fixed-point data is:        
- *        
- * <pre>        
- *     pDst[n] = (pSrc[n] * scaleFract) << shift,   0 <= n < blockSize.        
- * </pre>        
- *        
- * The overall scale factor applied to the fixed-point data is        
- * <pre>        
- *     scale = scaleFract * 2^shift.        
- * </pre>        
- *
- * The functions support in-place computation allowing the source and destination
- * pointers to reference the same memory buffer.
- */
-
-/**        
- * @addtogroup scale        
- * @{        
- */
-
-/**        
- * @brief Multiplies a floating-point vector by a scalar.        
- * @param[in]       *pSrc points to the input vector        
- * @param[in]       scale scale factor to be applied        
- * @param[out]      *pDst points to the output vector        
- * @param[in]       blockSize number of samples in the vector        
- * @return none.        
- */
-
-
-void arm_scale_f32(
-  float32_t * pSrc,
-  float32_t scale,
-  float32_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 */
-  float32_t in1, in2, in3, in4;                  /* temporary variabels */
-
-  /*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 * scale */
-    /* Scale the input and then store the results in the destination buffer. */
-    /* read input samples from source */
-    in1 = *pSrc;
-    in2 = *(pSrc + 1);
-
-    /* multiply with scaling factor */
-    in1 = in1 * scale;
-
-    /* read input sample from source */
-    in3 = *(pSrc + 2);
-
-    /* multiply with scaling factor */
-    in2 = in2 * scale;
-
-    /* read input sample from source */
-    in4 = *(pSrc + 3);
-
-    /* multiply with scaling factor */
-    in3 = in3 * scale;
-    in4 = in4 * scale;
-    /* store the result to destination */
-    *pDst = in1;
-    *(pDst + 1) = in2;
-    *(pDst + 2) = in3;
-    *(pDst + 3) = in4;
-
-    /* update pointers to process next samples */
-    pSrc += 4u;
-    pDst += 4u;
-
-    /* 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;
-
-#else
-
-  /* Run the below code for Cortex-M0 */
-
-  /* Initialize blkCnt with number of samples */
-  blkCnt = blockSize;
-
-#endif /* #ifndef ARM_MATH_CM0_FAMILY */
-
-  while(blkCnt > 0u)
-  {
-    /* C = A * scale */
-    /* Scale the input and then store the result in the destination buffer. */
-    *pDst++ = (*pSrc++) * scale;
-
-    /* Decrement the loop counter */
-    blkCnt--;
-  }
-}
-
-/**        
- * @} end of scale group        
- */