diff options
Diffstat (limited to 'DSP/Source/SupportFunctions/arm_fill_f32.c')
| -rw-r--r-- | DSP/Source/SupportFunctions/arm_fill_f32.c | 115 |
1 files changed, 72 insertions, 43 deletions
diff --git a/DSP/Source/SupportFunctions/arm_fill_f32.c b/DSP/Source/SupportFunctions/arm_fill_f32.c index be749c8..29f6286 100644 --- a/DSP/Source/SupportFunctions/arm_fill_f32.c +++ b/DSP/Source/SupportFunctions/arm_fill_f32.c @@ -3,13 +3,13 @@ * Title: arm_fill_f32.c * Description: Fills a constant value into a floating-point vector * - * $Date: 27. January 2017 - * $Revision: V.1.5.1 + * $Date: 18. March 2019 + * $Revision: V1.6.0 * * Target Processor: Cortex-M cores * -------------------------------------------------------------------- */ /* - * Copyright (C) 2010-2017 ARM Limited or its affiliates. All rights reserved. + * Copyright (C) 2010-2019 ARM Limited or its affiliates. All rights reserved. * * SPDX-License-Identifier: Apache-2.0 * @@ -29,36 +29,35 @@ #include "arm_math.h" /** - * @ingroup groupSupport + @ingroup groupSupport */ /** - * @defgroup Fill Vector Fill - * - * Fills the destination vector with a constant value. - * - * <pre> - * pDst[n] = value; 0 <= n < blockSize. - * </pre> - * - * There are separate functions for floating point, Q31, Q15, and Q7 data types. + @defgroup Fill Vector Fill + + Fills the destination vector with a constant value. + + <pre> + pDst[n] = value; 0 <= n < blockSize. + </pre> + + There are separate functions for floating point, Q31, Q15, and Q7 data types. */ /** - * @addtogroup Fill - * @{ + @addtogroup Fill + @{ */ /** - * @brief Fills a constant value into a floating-point vector. - * @param[in] value input value to be filled - * @param[out] *pDst points to output vector - * @param[in] blockSize length of the output vector - * @return none. - * + @brief Fills a constant value into a floating-point vector. + @param[in] value input value to be filled + @param[out] pDst points to output vector + @param[in] blockSize number of samples in each vector + @return none */ - +#if defined(ARM_MATH_NEON_EXPERIMENTAL) void arm_fill_f32( float32_t value, float32_t * pDst, @@ -66,27 +65,19 @@ void arm_fill_f32( { uint32_t blkCnt; /* loop counter */ -#if defined (ARM_MATH_DSP) - /* Run the below code for Cortex-M4 and Cortex-M3 */ - float32_t in1 = value; - float32_t in2 = value; - float32_t in3 = value; - float32_t in4 = value; + float32x4_t inV = vdupq_n_f32(value); - /*loop Unrolling */ blkCnt = blockSize >> 2U; - /* First part of the processing with loop unrolling. Compute 4 outputs at a time. + /* Compute 4 outputs at a time. ** a second loop below computes the remaining 1 to 3 samples. */ while (blkCnt > 0U) { /* C = value */ /* Fill the value in the destination buffer */ - *pDst++ = in1; - *pDst++ = in2; - *pDst++ = in3; - *pDst++ = in4; + vst1q_f32(pDst, inV); + pDst += 4; /* Decrement the loop counter */ blkCnt--; @@ -94,29 +85,67 @@ void arm_fill_f32( /* If the blockSize is not a multiple of 4, compute any remaining output samples here. ** No loop unrolling is used. */ - blkCnt = blockSize % 0x4U; + blkCnt = blockSize & 3; + + while (blkCnt > 0U) + { + /* C = value */ + /* Fill the value in the destination buffer */ + *pDst++ = value; + /* Decrement the loop counter */ + blkCnt--; + } +} #else +void arm_fill_f32( + float32_t value, + float32_t * pDst, + uint32_t blockSize) +{ + uint32_t blkCnt; /* Loop counter */ - /* Run the below code for Cortex-M0 */ +#if defined (ARM_MATH_LOOPUNROLL) - /* Loop over blockSize number of values */ - blkCnt = blockSize; + /* Loop unrolling: Compute 4 outputs at a time */ + blkCnt = blockSize >> 2U; + + while (blkCnt > 0U) + { + /* C = value */ -#endif /* #if defined (ARM_MATH_DSP) */ + /* Fill value in destination buffer */ + *pDst++ = value; + *pDst++ = value; + *pDst++ = value; + *pDst++ = value; + /* Decrement loop counter */ + blkCnt--; + } + + /* Loop unrolling: Compute remaining outputs */ + blkCnt = blockSize % 0x4U; + +#else + + /* Initialize blkCnt with number of samples */ + blkCnt = blockSize; + +#endif /* #if defined (ARM_MATH_LOOPUNROLL) */ while (blkCnt > 0U) { /* C = value */ - /* Fill the value in the destination buffer */ + + /* Fill value in destination buffer */ *pDst++ = value; - /* Decrement the loop counter */ + /* Decrement loop counter */ blkCnt--; } } - +#endif /* #if defined(ARM_MATH_NEON) */ /** - * @} end of Fill group + @} end of Fill group */ |