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Diffstat (limited to 'src/modules/mathlib/CMSIS/DSP_Lib/Source/ComplexMathFunctions/arm_cmplx_mult_real_f32.c')
| -rw-r--r-- | src/modules/mathlib/CMSIS/DSP_Lib/Source/ComplexMathFunctions/arm_cmplx_mult_real_f32.c | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/src/modules/mathlib/CMSIS/DSP_Lib/Source/ComplexMathFunctions/arm_cmplx_mult_real_f32.c b/src/modules/mathlib/CMSIS/DSP_Lib/Source/ComplexMathFunctions/arm_cmplx_mult_real_f32.c new file mode 100644 index 000000000..7a5bdf9cd --- /dev/null +++ b/src/modules/mathlib/CMSIS/DSP_Lib/Source/ComplexMathFunctions/arm_cmplx_mult_real_f32.c @@ -0,0 +1,217 @@ +/* ----------------------------------------------------------------------
+* Copyright (C) 2010 ARM Limited. All rights reserved.
+*
+* $Date: 15. February 2012
+* $Revision: V1.1.0
+*
+* Project: CMSIS DSP Library
+* Title: arm_cmplx_mult_real_f32.c
+*
+* Description: Floating-point complex by real multiplication
+*
+* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
+*
+* Version 1.1.0 2012/02/15
+* Updated with more optimizations, bug fixes and minor API changes.
+*
+* 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 groupCmplxMath
+ */
+
+/**
+ * @defgroup CmplxByRealMult Complex-by-Real Multiplication
+ *
+ * Multiplies a complex vector by a real vector and generates a complex result.
+ * The data in the complex arrays is stored in an interleaved fashion
+ * (real, imag, real, imag, ...).
+ * The parameter <code>numSamples</code> represents the number of complex
+ * samples processed. The complex arrays have a total of <code>2*numSamples</code>
+ * real values while the real array has a total of <code>numSamples</code>
+ * real values.
+ *
+ * The underlying algorithm is used:
+ *
+ * <pre>
+ * for(n=0; n<numSamples; n++) {
+ * pCmplxDst[(2*n)+0] = pSrcCmplx[(2*n)+0] * pSrcReal[n];
+ * pCmplxDst[(2*n)+1] = pSrcCmplx[(2*n)+1] * pSrcReal[n];
+ * }
+ * </pre>
+ *
+ * There are separate functions for floating-point, Q15, and Q31 data types.
+ */
+
+/**
+ * @addtogroup CmplxByRealMult
+ * @{
+ */
+
+
+/**
+ * @brief Floating-point 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.
+ */
+
+void arm_cmplx_mult_real_f32(
+ float32_t * pSrcCmplx,
+ float32_t * pSrcReal,
+ float32_t * pCmplxDst,
+ uint32_t numSamples)
+{
+ float32_t in; /* Temporary variable to store input value */
+ uint32_t blkCnt; /* loop counters */
+
+#ifndef ARM_MATH_CM0
+
+ /* Run the below code for Cortex-M4 and Cortex-M3 */
+ float32_t inA1, inA2, inA3, inA4; /* Temporary variables to hold input data */
+ float32_t inA5, inA6, inA7, inA8; /* Temporary variables to hold input data */
+ float32_t inB1, inB2, inB3, inB4; /* Temporary variables to hold input data */
+ float32_t out1, out2, out3, out4; /* Temporary variables to hold output data */
+ float32_t out5, out6, out7, out8; /* Temporary variables to hold output data */
+
+ /* loop Unrolling */
+ 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 input from complex input buffer */
+ inA1 = pSrcCmplx[0];
+ inA2 = pSrcCmplx[1];
+ /* read input from real input buffer */
+ inB1 = pSrcReal[0];
+
+ /* read input from complex input buffer */
+ inA3 = pSrcCmplx[2];
+
+ /* multiply complex buffer real input with real buffer input */
+ out1 = inA1 * inB1;
+
+ /* read input from complex input buffer */
+ inA4 = pSrcCmplx[3];
+
+ /* multiply complex buffer imaginary input with real buffer input */
+ out2 = inA2 * inB1;
+
+ /* read input from real input buffer */
+ inB2 = pSrcReal[1];
+ /* read input from complex input buffer */
+ inA5 = pSrcCmplx[4];
+
+ /* multiply complex buffer real input with real buffer input */
+ out3 = inA3 * inB2;
+
+ /* read input from complex input buffer */
+ inA6 = pSrcCmplx[5];
+ /* read input from real input buffer */
+ inB3 = pSrcReal[2];
+
+ /* multiply complex buffer imaginary input with real buffer input */
+ out4 = inA4 * inB2;
+
+ /* read input from complex input buffer */
+ inA7 = pSrcCmplx[6];
+
+ /* multiply complex buffer real input with real buffer input */
+ out5 = inA5 * inB3;
+
+ /* read input from complex input buffer */
+ inA8 = pSrcCmplx[7];
+
+ /* multiply complex buffer imaginary input with real buffer input */
+ out6 = inA6 * inB3;
+
+ /* read input from real input buffer */
+ inB4 = pSrcReal[3];
+
+ /* store result to destination bufer */
+ pCmplxDst[0] = out1;
+
+ /* multiply complex buffer real input with real buffer input */
+ out7 = inA7 * inB4;
+
+ /* store result to destination bufer */
+ pCmplxDst[1] = out2;
+
+ /* multiply complex buffer imaginary input with real buffer input */
+ out8 = inA8 * inB4;
+
+ /* store result to destination bufer */
+ pCmplxDst[2] = out3;
+ pCmplxDst[3] = out4;
+ pCmplxDst[4] = out5;
+
+ /* incremnet complex input buffer by 8 to process next samples */
+ pSrcCmplx += 8u;
+
+ /* store result to destination bufer */
+ pCmplxDst[5] = out6;
+
+ /* increment real input buffer by 4 to process next samples */
+ pSrcReal += 4u;
+
+ /* store result to destination bufer */
+ pCmplxDst[6] = out7;
+ pCmplxDst[7] = out8;
+
+ /* increment destination buffer by 8 to process next sampels */
+ pCmplxDst += 8u;
+
+ /* Decrement the numSamples loop counter */
+ blkCnt--;
+ }
+
+ /* If the numSamples is not a multiple of 4, compute any remaining output samples here.
+ ** No loop unrolling is used. */
+ blkCnt = numSamples % 0x4u;
+
+#else
+
+ /* Run the below code for Cortex-M0 */
+ blkCnt = numSamples;
+
+#endif /* #ifndef ARM_MATH_CM0 */
+
+ while(blkCnt > 0u)
+ {
+ /* C[2 * i] = A[2 * i] * B[i]. */
+ /* C[2 * i + 1] = A[2 * i + 1] * B[i]. */
+ in = *pSrcReal++;
+ /* store the result in the destination buffer. */
+ *pCmplxDst++ = (*pSrcCmplx++) * (in);
+ *pCmplxDst++ = (*pSrcCmplx++) * (in);
+
+ /* Decrement the numSamples loop counter */
+ blkCnt--;
+ }
+}
+
+/**
+ * @} end of CmplxByRealMult group
+ */
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