1 files changed, 157 insertions, 0 deletions
diff --git a/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_conj_q15.c b/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_conj_q15.c
new file mode 100644
index 0000000..d7fdc28
--- /dev/null
+++ b/Drivers/CMSIS/DSP/Source/ComplexMathFunctions/arm_cmplx_conj_q15.c
@@ -0,0 +1,157 @@
+/* ----------------------------------------------------------------------
+ * Project:      CMSIS DSP Library
+ * Title:        arm_cmplx_conj_q15.c
+ * Description:  Q15 complex conjugate
+ *
+ * $Date:        18. March 2019
+ * $Revision:    V1.6.0
+ *
+ * Target Processor: Cortex-M cores
+ * -------------------------------------------------------------------- */
+/*
+ * Copyright (C) 2010-2019 ARM Limited or its affiliates. All rights reserved.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the License); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an AS IS BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "arm_math.h"
+
+/**
+  @ingroup groupCmplxMath
+ */
+
+/**
+  @addtogroup cmplx_conj
+  @{
+ */
+
+/**
+  @brief         Q15 complex conjugate.
+  @param[in]     pSrc        points to the input vector
+  @param[out]    pDst        points to the output vector
+  @param[in]     numSamples  number of samples in each vector
+  @return        none
+
+  @par           Scaling and Overflow Behavior
+                   The function uses saturating arithmetic.
+                   The Q15 value -1 (0x8000) is saturated to the maximum allowable positive value 0x7FFF.
+ */
+
+void arm_cmplx_conj_q15(
+  const q15_t * pSrc,
+        q15_t * pDst,
+        uint32_t numSamples)
+{
+        uint32_t blkCnt;                               /* Loop counter */
+        q31_t in1;                                     /* Temporary input variable */
+
+#if defined (ARM_MATH_LOOPUNROLL) && defined (ARM_MATH_DSP)
+        q31_t in2, in3, in4;                           /* Temporary input variables */
+#endif
+
+
+#if defined (ARM_MATH_LOOPUNROLL)
+
+  /* Loop unrolling: Compute 4 outputs at a time */
+  blkCnt = numSamples >> 2U;
+
+  while (blkCnt > 0U)
+  {
+    /* C[0] + jC[1] = A[0]+ j(-1)A[1] */
+
+    /* Calculate Complex Conjugate and store result in destination buffer. */
+
+    #if defined (ARM_MATH_DSP)
+    in1 = read_q15x2_ia ((q15_t **) &pSrc);
+    in2 = read_q15x2_ia ((q15_t **) &pSrc);
+    in3 = read_q15x2_ia ((q15_t **) &pSrc);
+    in4 = read_q15x2_ia ((q15_t **) &pSrc);
+
+#ifndef ARM_MATH_BIG_ENDIAN
+    in1 = __QASX(0, in1);
+    in2 = __QASX(0, in2);
+    in3 = __QASX(0, in3);
+    in4 = __QASX(0, in4);
+#else
+    in1 = __QSAX(0, in1);
+    in2 = __QSAX(0, in2);
+    in3 = __QSAX(0, in3);
+    in4 = __QSAX(0, in4);
+#endif /* #ifndef ARM_MATH_BIG_ENDIAN */
+
+    in1 = ((uint32_t) in1 >> 16) | ((uint32_t) in1 << 16);
+    in2 = ((uint32_t) in2 >> 16) | ((uint32_t) in2 << 16);
+    in3 = ((uint32_t) in3 >> 16) | ((uint32_t) in3 << 16);
+    in4 = ((uint32_t) in4 >> 16) | ((uint32_t) in4 << 16);
+
+    write_q15x2_ia (&pDst, in1);
+    write_q15x2_ia (&pDst, in2);
+    write_q15x2_ia (&pDst, in3);
+    write_q15x2_ia (&pDst, in4);
+#else
+    *pDst++ =  *pSrc++;
+    in1 = *pSrc++;
+    *pDst++ = (in1 == (q15_t) 0x8000) ? (q15_t) 0x7fff : -in1;
+
+    *pDst++ =  *pSrc++;
+    in1 = *pSrc++;
+    *pDst++ = (in1 == (q15_t) 0x8000) ? (q15_t) 0x7fff : -in1;
+
+    *pDst++ =  *pSrc++;
+    in1 = *pSrc++;
+    *pDst++ = (in1 == (q15_t) 0x8000) ? (q15_t) 0x7fff : -in1;
+
+    *pDst++ =  *pSrc++;
+    in1 = *pSrc++;
+    *pDst++ = (in1 == (q15_t) 0x8000) ? (q15_t) 0x7fff : -in1;
+
+#endif /* #if defined (ARM_MATH_DSP) */
+
+    /* Decrement loop counter */
+    blkCnt--;
+  }
+
+  /* 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[0] + jC[1] = A[0]+ j(-1)A[1] */
+
+    /* Calculate Complex Conjugate and store result in destination buffer. */
+    *pDst++ =  *pSrc++;
+    in1 = *pSrc++;
+#if defined (ARM_MATH_DSP)
+    *pDst++ = __SSAT(-in1, 16);
+#else
+    *pDst++ = (in1 == (q15_t) 0x8000) ? (q15_t) 0x7fff : -in1;
+#endif
+
+    /* Decrement loop counter */
+    blkCnt--;
+  }
+
+}
+
+/**
+  @} end of cmplx_conj group
+ */