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path: root/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mult_real_q31.c
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Diffstat (limited to 'Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mult_real_q31.c')
-rw-r--r--Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mult_real_q31.c239
1 files changed, 88 insertions, 151 deletions
diff --git a/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mult_real_q31.c b/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mult_real_q31.c
index 19fc55bbe..906410f36 100644
--- a/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mult_real_q31.c
+++ b/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_mult_real_q31.c
@@ -3,13 +3,13 @@
* Title: arm_cmplx_mult_real_q31.c
* Description: Q31 complex by real multiplication
*
- * $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
*
@@ -29,183 +29,120 @@
#include "arm_math.h"
/**
- * @ingroup groupCmplxMath
+ @ingroup groupCmplxMath
*/
/**
- * @addtogroup CmplxByRealMult
- * @{
+ @addtogroup CmplxByRealMult
+ @{
*/
-
/**
- * @brief Q31 complex-by-real multiplication
- * @param[in] *pSrcCmplx points to the complex input vector
- * @param[in] *pSrcReal points to the real input vector
- * @param[out] *pCmplxDst points to the complex output vector
- * @param[in] numSamples 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.
+ @brief Q31 complex-by-real multiplication.
+ @param[in] pSrcCmplx points to complex input vector
+ @param[in] pSrcReal points to real input vector
+ @param[out] pCmplxDst points to complex output vector
+ @param[in] numSamples number of samples in each vector
+ @return none
+
+ @par Scaling and Overflow Behavior
+ The function uses saturating arithmetic.
+ Results outside of the allowable Q31 range[0x80000000 0x7FFFFFFF] are saturated.
*/
void arm_cmplx_mult_real_q31(
- q31_t * pSrcCmplx,
- q31_t * pSrcReal,
- q31_t * pCmplxDst,
- uint32_t numSamples)
+ const q31_t * pSrcCmplx,
+ const q31_t * pSrcReal,
+ q31_t * pCmplxDst,
+ uint32_t numSamples)
{
- q31_t inA1; /* Temporary variable to store input value */
-
-#if defined (ARM_MATH_DSP)
+ uint32_t blkCnt; /* Loop counter */
+ q31_t in; /* Temporary variable */
- /* Run the below code for Cortex-M4 and Cortex-M3 */
- uint32_t blkCnt; /* loop counters */
- q31_t inA2, inA3, inA4; /* Temporary variables to hold input data */
- q31_t inB1, inB2; /* Temporary variabels to hold input data */
- q31_t out1, out2, out3, out4; /* Temporary variables to hold output data */
+#if defined (ARM_MATH_LOOPUNROLL)
- /* loop Unrolling */
+ /* Loop unrolling: Compute 4 outputs at a time */
blkCnt = numSamples >> 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[2 * i] = A[2 * i] * B[i]. */
- /* C[2 * i + 1] = A[2 * i + 1] * B[i]. */
- /* read real input from complex input buffer */
- inA1 = *pSrcCmplx++;
- inA2 = *pSrcCmplx++;
- /* read input from real input bufer */
- inB1 = *pSrcReal++;
- inB2 = *pSrcReal++;
- /* read imaginary input from complex input buffer */
- inA3 = *pSrcCmplx++;
- inA4 = *pSrcCmplx++;
-
- /* multiply complex input with real input */
- out1 = ((q63_t) inA1 * inB1) >> 32;
- out2 = ((q63_t) inA2 * inB1) >> 32;
- out3 = ((q63_t) inA3 * inB2) >> 32;
- out4 = ((q63_t) inA4 * inB2) >> 32;
-
- /* sature the result */
- out1 = __SSAT(out1, 31);
- out2 = __SSAT(out2, 31);
- out3 = __SSAT(out3, 31);
- out4 = __SSAT(out4, 31);
-
- /* get result in 1.31 format */
- out1 = out1 << 1;
- out2 = out2 << 1;
- out3 = out3 << 1;
- out4 = out4 << 1;
-
- /* store the result to destination buffer */
- *pCmplxDst++ = out1;
- *pCmplxDst++ = out2;
- *pCmplxDst++ = out3;
- *pCmplxDst++ = out4;
-
- /* read real input from complex input buffer */
- inA1 = *pSrcCmplx++;
- inA2 = *pSrcCmplx++;
- /* read input from real input bufer */
- inB1 = *pSrcReal++;
- inB2 = *pSrcReal++;
- /* read imaginary input from complex input buffer */
- inA3 = *pSrcCmplx++;
- inA4 = *pSrcCmplx++;
-
- /* multiply complex input with real input */
- out1 = ((q63_t) inA1 * inB1) >> 32;
- out2 = ((q63_t) inA2 * inB1) >> 32;
- out3 = ((q63_t) inA3 * inB2) >> 32;
- out4 = ((q63_t) inA4 * inB2) >> 32;
-
- /* sature the result */
- out1 = __SSAT(out1, 31);
- out2 = __SSAT(out2, 31);
- out3 = __SSAT(out3, 31);
- out4 = __SSAT(out4, 31);
-
- /* get result in 1.31 format */
- out1 = out1 << 1;
- out2 = out2 << 1;
- out3 = out3 << 1;
- out4 = out4 << 1;
-
- /* store the result to destination buffer */
- *pCmplxDst++ = out1;
- *pCmplxDst++ = out2;
- *pCmplxDst++ = out3;
- *pCmplxDst++ = out4;
-
- /* Decrement the numSamples loop counter */
+ /* C[2 * i ] = A[2 * i ] * B[i]. */
+ /* C[2 * i + 1] = A[2 * i + 1] * B[i]. */
+
+ in = *pSrcReal++;
+#if defined (ARM_MATH_DSP)
+ /* store saturated result in 1.31 format to destination buffer */
+ *pCmplxDst++ = (__SSAT((q31_t) (((q63_t) *pSrcCmplx++ * in) >> 32), 31) << 1);
+ *pCmplxDst++ = (__SSAT((q31_t) (((q63_t) *pSrcCmplx++ * in) >> 32), 31) << 1);
+#else
+ /* store result in destination buffer. */
+ *pCmplxDst++ = (q31_t) clip_q63_to_q31(((q63_t) *pSrcCmplx++ * in) >> 31);
+ *pCmplxDst++ = (q31_t) clip_q63_to_q31(((q63_t) *pSrcCmplx++ * in) >> 31);
+#endif
+
+ in = *pSrcReal++;
+#if defined (ARM_MATH_DSP)
+ *pCmplxDst++ = (__SSAT((q31_t) (((q63_t) *pSrcCmplx++ * in) >> 32), 31) << 1);
+ *pCmplxDst++ = (__SSAT((q31_t) (((q63_t) *pSrcCmplx++ * in) >> 32), 31) << 1);
+#else
+ *pCmplxDst++ = (q31_t) clip_q63_to_q31(((q63_t) *pSrcCmplx++ * in) >> 31);
+ *pCmplxDst++ = (q31_t) clip_q63_to_q31(((q63_t) *pSrcCmplx++ * in) >> 31);
+#endif
+
+ in = *pSrcReal++;
+#if defined (ARM_MATH_DSP)
+ *pCmplxDst++ = (__SSAT((q31_t) (((q63_t) *pSrcCmplx++ * in) >> 32), 31) << 1);
+ *pCmplxDst++ = (__SSAT((q31_t) (((q63_t) *pSrcCmplx++ * in) >> 32), 31) << 1);
+#else
+ *pCmplxDst++ = (q31_t) clip_q63_to_q31(((q63_t) *pSrcCmplx++ * in) >> 31);
+ *pCmplxDst++ = (q31_t) clip_q63_to_q31(((q63_t) *pSrcCmplx++ * in) >> 31);
+#endif
+
+ in = *pSrcReal++;
+#if defined (ARM_MATH_DSP)
+ *pCmplxDst++ = (__SSAT((q31_t) (((q63_t) *pSrcCmplx++ * in) >> 32), 31) << 1);
+ *pCmplxDst++ = (__SSAT((q31_t) (((q63_t) *pSrcCmplx++ * in) >> 32), 31) << 1);
+#else
+ *pCmplxDst++ = (q31_t) clip_q63_to_q31(((q63_t) *pSrcCmplx++ * in) >> 31);
+ *pCmplxDst++ = (q31_t) clip_q63_to_q31(((q63_t) *pSrcCmplx++ * in) >> 31);
+#endif
+
+ /* Decrement loop counter */
blkCnt--;
}
- /* If the numSamples is not a multiple of 4, compute any remaining output samples here.
- ** No loop unrolling is used. */
+ /* Loop unrolling: Compute remaining outputs */
blkCnt = numSamples % 0x4U;
+#else
+
+ /* Initialize blkCnt with number of samples */
+ blkCnt = numSamples;
+
+#endif /* #if defined (ARM_MATH_LOOPUNROLL) */
+
while (blkCnt > 0U)
{
- /* C[2 * i] = A[2 * i] * B[i]. */
- /* C[2 * i + 1] = A[2 * i + 1] * B[i]. */
- /* read real input from complex input buffer */
- inA1 = *pSrcCmplx++;
- inA2 = *pSrcCmplx++;
- /* read input from real input bufer */
- inB1 = *pSrcReal++;
-
- /* multiply complex input with real input */
- out1 = ((q63_t) inA1 * inB1) >> 32;
- out2 = ((q63_t) inA2 * inB1) >> 32;
-
- /* sature the result */
- out1 = __SSAT(out1, 31);
- out2 = __SSAT(out2, 31);
-
- /* get result in 1.31 format */
- out1 = out1 << 1;
- out2 = out2 << 1;
-
- /* store the result to destination buffer */
- *pCmplxDst++ = out1;
- *pCmplxDst++ = out2;
-
- /* Decrement the numSamples loop counter */
- blkCnt--;
- }
+ /* C[2 * i ] = A[2 * i ] * B[i]. */
+ /* C[2 * i + 1] = A[2 * i + 1] * B[i]. */
+ in = *pSrcReal++;
+#if defined (ARM_MATH_DSP)
+ /* store saturated result in 1.31 format to destination buffer */
+ *pCmplxDst++ = (__SSAT((q31_t) (((q63_t) *pSrcCmplx++ * in) >> 32), 31) << 1);
+ *pCmplxDst++ = (__SSAT((q31_t) (((q63_t) *pSrcCmplx++ * in) >> 32), 31) << 1);
#else
+ /* store result in destination buffer. */
+ *pCmplxDst++ = (q31_t) clip_q63_to_q31(((q63_t) *pSrcCmplx++ * in) >> 31);
+ *pCmplxDst++ = (q31_t) clip_q63_to_q31(((q63_t) *pSrcCmplx++ * in) >> 31);
+#endif
- /* Run the below code for Cortex-M0 */
-
- while (numSamples > 0U)
- {
- /* realOut = realA * realB. */
- /* imagReal = imagA * realB. */
- inA1 = *pSrcReal++;
- /* store the result in the destination buffer. */
- *pCmplxDst++ =
- (q31_t) clip_q63_to_q31(((q63_t) * pSrcCmplx++ * inA1) >> 31);
- *pCmplxDst++ =
- (q31_t) clip_q63_to_q31(((q63_t) * pSrcCmplx++ * inA1) >> 31);
-
- /* Decrement the numSamples loop counter */
- numSamples--;
+ /* Decrement loop counter */
+ blkCnt--;
}
-#endif /* #if defined (ARM_MATH_DSP) */
-
}
/**
- * @} end of CmplxByRealMult group
+ @} end of CmplxByRealMult group
*/
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