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Added Oplayer BSP, Fixed bug on GPIO library(gpiosetval change all the port...
Added Oplayer BSP, Fixed bug on GPIO library(gpiosetval change all the port instead of the desired bit).
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arm_float_to_q31.c
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/ lib / src / stm32f4 / CPU / CMSIS / DSP_Lib / Source / SupportFunctions / arm_float_to_q31.c
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jeandet@pc-de-jeandet3.LAB-LPP.LOCAL
Added ARM CMSIS for fast math and circle drawing function for ili9328 driver.
 r41 /* ----------------------------------------------------------------------------
* Copyright (C) 2010 ARM Limited. All rights reserved.
*
* $Date: 15. July 2011
* $Revision: V1.0.10
*
* Project: CMSIS DSP Library
* Title: arm_float_to_q31.c
*
* Description: Converts the elements of the floating-point vector to Q31 vector.
*
* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
*
* Version 1.0.10 2011/7/15
* Big Endian support added and Merged M0 and M3/M4 Source code.
*
* Version 1.0.3 2010/11/29
* Re-organized the CMSIS folders and updated documentation.
*
* Version 1.0.2 2010/11/11
* Documentation updated.
*
* Version 1.0.1 2010/10/05
* Production release and review comments incorporated.
*
* Version 1.0.0 2010/09/20
* Production release and review comments incorporated.
* ---------------------------------------------------------------------------- */
#include "arm_math.h"
/**
* @ingroup groupSupport
*/
/**
* @defgroup float_to_x Convert 32-bit floating point value
*/
/**
* @addtogroup float_to_x
* @{
*/
/**
* @brief Converts the elements of the floating-point vector to Q31 vector.
* @param[in] *pSrc points to the floating-point input vector
* @param[out] *pDst points to the Q31 output vector
* @param[in] blockSize length of the input vector
* @return none.
*
*\par Description:
* \par
* The equation used for the conversion process is:
*
* <pre>
* pDst[n] = (q31_t)(pSrc[n] * 2147483648); 0 <= n < blockSize.
* </pre>
* <b>Scaling and Overflow Behavior:</b>
* \par
* The function uses saturating arithmetic.
* Results outside of the allowable Q31 range[0x80000000 0x7FFFFFFF] will be saturated.
*
* \note In order to apply rounding, the library should be rebuilt with the ROUNDING macro
* defined in the preprocessor section of project options.
*/
void arm_float_to_q31(
float32_t * pSrc,
q31_t * pDst,
uint32_t blockSize)
{
float32_t *pIn = pSrc; /* Src pointer */
uint32_t blkCnt; /* loop counter */
#ifdef ARM_MATH_ROUNDING
float32_t in;
#endif /* #ifdef ARM_MATH_ROUNDING */
#ifndef ARM_MATH_CM0
/* Run the below code for Cortex-M4 and Cortex-M3 */
/*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)
{
#ifdef ARM_MATH_ROUNDING
/* C = A * 32768 */
/* convert from float to Q31 and then store the results in the destination buffer */
in = *pIn++;
in = (in * 2147483648.0f);
in += in > 0 ? 0.5 : -0.5;
*pDst++ = clip_q63_to_q31((q63_t) (in));
in = *pIn++;
in = (in * 2147483648.0f);
in += in > 0 ? 0.5 : -0.5;
*pDst++ = clip_q63_to_q31((q63_t) (in));
in = *pIn++;
in = (in * 2147483648.0f);
in += in > 0 ? 0.5 : -0.5;
*pDst++ = clip_q63_to_q31((q63_t) (in));
in = *pIn++;
in = (in * 2147483648.0f);
in += in > 0 ? 0.5 : -0.5;
*pDst++ = clip_q63_to_q31((q63_t) (in));
#else
/* C = A * 2147483648 */
/* convert from float to Q31 and then store the results in the destination buffer */
*pDst++ = clip_q63_to_q31((q63_t) (*pIn++ * 2147483648.0f));
*pDst++ = clip_q63_to_q31((q63_t) (*pIn++ * 2147483648.0f));
*pDst++ = clip_q63_to_q31((q63_t) (*pIn++ * 2147483648.0f));
*pDst++ = clip_q63_to_q31((q63_t) (*pIn++ * 2147483648.0f));
#endif /* #ifdef ARM_MATH_ROUNDING */
/* 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)
{
#ifdef ARM_MATH_ROUNDING
/* C = A * 2147483648 */
/* convert from float to Q31 and then store the results in the destination buffer */
in = *pIn++;
in = (in * 2147483648.0f);
in += in > 0 ? 0.5 : -0.5;
*pDst++ = clip_q63_to_q31((q63_t) (in));
#else
/* C = A * 2147483648 */
/* convert from float to Q31 and then store the results in the destination buffer */
*pDst++ = clip_q63_to_q31((q63_t) (*pIn++ * 2147483648.0f));
#endif /* #ifdef ARM_MATH_ROUNDING */
/* Decrement the loop counter */
blkCnt--;
}
#else
/* Run the below code for Cortex-M0 */
/* Loop over blockSize number of values */
blkCnt = blockSize;
while(blkCnt > 0u)
{
#ifdef ARM_MATH_ROUNDING
/* C = A * 2147483648 */
/* convert from float to Q31 and then store the results in the destination buffer */
in = *pIn++;
in = (in * 2147483648.0f);
in += in > 0 ? 0.5f : -0.5f;
*pDst++ = clip_q63_to_q31((q63_t) (in));
#else
/* C = A * 2147483648 */
/* convert from float to Q31 and then store the results in the destination buffer */
*pDst++ = clip_q63_to_q31((q63_t) (*pIn++ * 2147483648.0f));
#endif /* #ifdef ARM_MATH_ROUNDING */
/* Decrement the loop counter */
blkCnt--;
}
#endif /* #ifndef ARM_MATH_CM0 */
}
/**
* @} end of float_to_x group
*/