新增所有文件

2025-10-25 21:11:06 +08:00
parent 8cc4755d15
commit 3134504178
8414 changed files with 2995287 additions and 5 deletions
--- a/CMSIS/DSP/Source/SupportFunctions/arm_f16_to_q15.c
+++ b/CMSIS/DSP/Source/SupportFunctions/arm_f16_to_q15.c
@@ -0,0 +1,157 @@
+/* ----------------------------------------------------------------------
+ * Project:      CMSIS DSP Library
+ * Title:        arm_float_to_q15.c
+ * Description:  Converts the elements of the floating-point vector to Q15 vector
+ *
+ * $Date:        23 April 2021
+ * $Revision:    V1.9.0
+ *
+ * Target Processor: Cortex-M and Cortex-A cores
+ * -------------------------------------------------------------------- */
+/*
+ * Copyright (C) 2010-2021 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 "dsp/support_functions_f16.h"
+
+#if defined(ARM_FLOAT16_SUPPORTED)
+
+
+/**
+  @ingroup groupSupport
+ */
+
+/**
+  @addtogroup f16_to_x
+  @{
+ */
+
+/**
+  @brief         Converts the elements of the f16 vector to Q15 vector.
+  @param[in]     pSrc       points to the f16 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] * 32768);   0 <= n < blockSize.
+  </pre>
+
+  @par           Scaling and Overflow Behavior
+                   The function uses saturating arithmetic.
+                   Results outside of the allowable Q15 range [0x8000 0x7FFF] are saturated.
+
+  @note
+                   In order to apply rounding in scalar version, the library should be rebuilt with the ROUNDING macro
+                   defined in the preprocessor section of project options.
+ */
+
+#if defined(ARM_MATH_MVE_FLOAT16) && !defined(ARM_MATH_AUTOVECTORIZE)
+
+void arm_f16_to_q15(
+  const float16_t * pSrc,
+  q15_t * pDst,
+  uint32_t blockSize)
+{
+    float16_t       maxQ = (float16_t) Q15_MAX;
+    float16x8_t         vecDst;
+
+
+    do {
+        mve_pred16_t    p = vctp16q(blockSize);
+
+        vecDst = vldrhq_z_f16((float16_t const *) pSrc, p);
+        /* C = A * 32767 */
+        /* convert from float to Q15 and then store the results in the destination buffer */
+        vecDst = vmulq_m(vuninitializedq_f16(), vecDst, maxQ, p);
+
+        vstrhq_p_s16(pDst,
+            vcvtaq_m(vuninitializedq_s16(), vecDst, p), p);
+        /*
+         * Decrement the blockSize loop counter
+         * Advance vector source and destination pointers
+         */
+        pSrc += 8;
+        pDst += 8;
+        blockSize -= 8;
+    }
+    while ((int32_t) blockSize > 0);
+}
+
+#else
+
+void arm_f16_to_q15(
+  const float16_t * pSrc,
+        q15_t * pDst,
+        uint32_t blockSize)
+{
+    const float16_t *pIn = pSrc;      /* Src pointer */
+    uint32_t  blkCnt;           /* loop counter */
+#ifdef ARM_MATH_ROUNDING
+    float16_t in;
+#endif                          /*      #ifdef ARM_MATH_ROUNDING        */
+
+    /*
+     * Loop over blockSize number of values
+     */
+    blkCnt = blockSize;
+
+    while (blkCnt > 0U)
+    {
+
+#ifdef ARM_MATH_ROUNDING
+
+        /*
+         * C = A * 65536
+         */
+        /*
+         * convert from float to Q31 and then store the results in the destination buffer
+         */
+        in = *pIn++;
+        in = ((_Float16)in * (_Float16)32768.0f16);
+        in += (_Float16)in > 0.0f16 ? 0.5f16 : -0.5f16;
+        *pDst++ = clip_q31_to_q15((q31_t) (in));
+
+#else
+
+        /*
+         * C = A * 32768
+         */
+        /*
+         * convert from float to Q31 and then store the results in the destination buffer
+         */
+        *pDst++ = clip_q31_to_q15((q31_t) ((_Float16)*pIn++ * 32768.0f16));
+
+#endif                          /*      #ifdef ARM_MATH_ROUNDING        */
+
+        /*
+         * Decrement the loop counter
+         */
+        blkCnt--;
+    }
+
+}
+#endif /* defined(ARM_MATH_MVEF) && !defined(ARM_MATH_AUTOVECTORIZE) */
+
+/**
+  @} end of f16_to_x group
+ */
+
+#endif /* #if defined(ARM_FLOAT16_SUPPORTED) */ 
+