From 5b81bc8ccbd342b8566d88fc9f17a73aec03b5b6 Mon Sep 17 00:00:00 2001
From: Clyne Sullivan <clyne@bitgloo.com>
Date: Wed, 29 Jan 2025 21:34:25 -0500
Subject: initial commit
---
.../DSP/Source/FastMathFunctions/arm_vlog_f32.c | 119 +++++++++++++++++++++
1 file changed, 119 insertions(+)
create mode 100644 Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_vlog_f32.c
(limited to 'Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_vlog_f32.c')
diff --git a/Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_vlog_f32.c b/Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_vlog_f32.c
new file mode 100644
index 0000000..888a11f
--- /dev/null
+++ b/Drivers/CMSIS/DSP/Source/FastMathFunctions/arm_vlog_f32.c
@@ -0,0 +1,119 @@
+/* ----------------------------------------------------------------------
+ * Project: CMSIS DSP Library
+ * Title: arm_vlog_f32.c
+ * Description: Fast vectorized log
+ *
+ * $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/fast_math_functions.h"
+#include "arm_common_tables.h"
+
+
+/**
+ @ingroup groupFastMath
+ */
+
+
+/**
+ @defgroup vlog Vector Log
+
+ Compute the log values of a vector of samples.
+
+ */
+
+/**
+ @addtogroup vlog
+ @{
+ */
+
+#if (defined(ARM_MATH_MVEF) || defined(ARM_MATH_HELIUM) || defined(ARM_MATH_NEON) || defined(ARM_MATH_NEON_EXPERIMENTAL)) && !defined(ARM_MATH_AUTOVECTORIZE)
+#include "arm_vec_math.h"
+#endif
+
+void arm_vlog_f32(
+ const float32_t * pSrc,
+ float32_t * pDst,
+ uint32_t blockSize)
+{
+ uint32_t blkCnt;
+
+#if (defined(ARM_MATH_MVEF) || defined(ARM_MATH_HELIUM)) && !defined(ARM_MATH_AUTOVECTORIZE)
+ f32x4_t src;
+ f32x4_t dst;
+
+ blkCnt = blockSize >> 2;
+
+ while (blkCnt > 0U)
+ {
+ src = vld1q(pSrc);
+ dst = vlogq_f32(src);
+ vst1q(pDst, dst);
+
+ pSrc += 4;
+ pDst += 4;
+ /* Decrement loop counter */
+ blkCnt--;
+ }
+
+ blkCnt = blockSize & 3;
+#else
+#if (defined(ARM_MATH_NEON) || defined(ARM_MATH_NEON_EXPERIMENTAL)) && !defined(ARM_MATH_AUTOVECTORIZE)
+ f32x4_t src;
+ f32x4_t dst;
+
+ blkCnt = blockSize >> 2;
+
+ while (blkCnt > 0U)
+ {
+ src = vld1q_f32(pSrc);
+ dst = vlogq_f32(src);
+ vst1q_f32(pDst, dst);
+
+ pSrc += 4;
+ pDst += 4;
+ /* Decrement loop counter */
+ blkCnt--;
+ }
+
+ blkCnt = blockSize & 3;
+#else
+ blkCnt = blockSize;
+#endif
+#endif
+
+ while (blkCnt > 0U)
+ {
+ /* C = log(A) */
+
+ /* Calculate log and store result in destination buffer. */
+ *pDst++ = logf(*pSrc++);
+
+ /* Decrement loop counter */
+ blkCnt--;
+ }
+}
+
+/**
+ @} end of vlog group
+ */
--
cgit v1.2.3