From 86608c6770cf08c138a2bdab5855072f64be09ef Mon Sep 17 00:00:00 2001
From: joshua <joshua@joshuayun.com>
Date: Sat, 30 Dec 2023 23:54:31 -0500
Subject: initial commit

---
 .../DSP/Source/SupportFunctions/arm_q7_to_q15.c    | 143 +++++++++++++++++++++
 1 file changed, 143 insertions(+)
 create mode 100644 Drivers/CMSIS/DSP/Source/SupportFunctions/arm_q7_to_q15.c

(limited to 'Drivers/CMSIS/DSP/Source/SupportFunctions/arm_q7_to_q15.c')

diff --git a/Drivers/CMSIS/DSP/Source/SupportFunctions/arm_q7_to_q15.c b/Drivers/CMSIS/DSP/Source/SupportFunctions/arm_q7_to_q15.c
new file mode 100644
index 0000000..78dae9e
--- /dev/null
+++ b/Drivers/CMSIS/DSP/Source/SupportFunctions/arm_q7_to_q15.c
@@ -0,0 +1,143 @@
+/* ----------------------------------------------------------------------
+ * Project:      CMSIS DSP Library
+ * Title:        arm_q7_to_q15.c
+ * Description:  Converts the elements of the Q7 vector to Q15 vector
+ *
+ * $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 groupSupport
+ */
+
+/**
+  @addtogroup q7_to_x
+  @{
+ */
+
+/**
+  @brief         Converts the elements of the Q7 vector to Q15 vector.
+  @param[in]     pSrc       points to the Q7 input vector
+  @param[out]    pDst       points to the Q15 output vector
+  @param[in]     blockSize  number of samples in each vector
+  @return        none
+
+  @par           Details
+                   The equation used for the conversion process is:
+  <pre>
+      pDst[n] = (q15_t) pSrc[n] << 8;   0 <= n < blockSize.
+  </pre>
+ */
+
+void arm_q7_to_q15(
+  const q7_t * pSrc,
+        q15_t * pDst,
+        uint32_t blockSize)
+{
+        uint32_t blkCnt;                               /* Loop counter */
+  const q7_t *pIn = pSrc;                              /* Source pointer */
+
+#if defined (ARM_MATH_LOOPUNROLL) && defined (ARM_MATH_DSP)
+        q31_t in;
+        q31_t in1, in2;
+        q31_t out1, out2;
+#endif
+
+#if defined (ARM_MATH_LOOPUNROLL)
+
+  /* Loop unrolling: Compute 4 outputs at a time */
+  blkCnt = blockSize >> 2U;
+
+  while (blkCnt > 0U)
+  {
+    /* C = (q15_t) A << 8 */
+
+    /* Convert from q7 to q15 and store result in destination buffer */
+#if defined (ARM_MATH_DSP)
+
+    in = read_q7x4_ia ((q7_t **) &pIn);
+
+    /* rotatate in by 8 and extend two q7_t values to q15_t values */
+    in1 = __SXTB16(__ROR(in, 8));
+
+    /* extend remainig two q7_t values to q15_t values */
+    in2 = __SXTB16(in);
+
+    in1 = in1 << 8U;
+    in2 = in2 << 8U;
+
+    in1 = in1 & 0xFF00FF00;
+    in2 = in2 & 0xFF00FF00;
+
+#ifndef ARM_MATH_BIG_ENDIAN
+    out2 = __PKHTB(in1, in2, 16);
+    out1 = __PKHBT(in2, in1, 16);
+#else
+    out1 = __PKHTB(in1, in2, 16);
+    out2 = __PKHBT(in2, in1, 16);
+#endif
+
+    write_q15x2_ia (&pDst, out1);
+    write_q15x2_ia (&pDst, out2);
+
+#else
+
+    *pDst++ = (q15_t) *pIn++ << 8;
+    *pDst++ = (q15_t) *pIn++ << 8;
+    *pDst++ = (q15_t) *pIn++ << 8;
+    *pDst++ = (q15_t) *pIn++ << 8;
+
+#endif /* #if defined (ARM_MATH_DSP) */
+
+    /* 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 = (q15_t) A << 8 */
+
+    /* Convert from q7 to q15 and store result in destination buffer */
+    *pDst++ = (q15_t) * pIn++ << 8;
+
+    /* Decrement loop counter */
+    blkCnt--;
+  }
+
+}
+
+/**
+  @} end of q7_to_x group
+ */
-- 
cgit v1.2.3