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/BasicMathFunctions/arm_offset_q7.c | 162 +++++++++++++++++++++
1 file changed, 162 insertions(+)
create mode 100644 Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_offset_q7.c
(limited to 'Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_offset_q7.c')
diff --git a/Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_offset_q7.c b/Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_offset_q7.c
new file mode 100644
index 0000000..b53229d
--- /dev/null
+++ b/Drivers/CMSIS/DSP/Source/BasicMathFunctions/arm_offset_q7.c
@@ -0,0 +1,162 @@
+/* ----------------------------------------------------------------------
+ * Project: CMSIS DSP Library
+ * Title: arm_offset_q7.c
+ * Description: Q7 vector offset
+ *
+ * $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/basic_math_functions.h"
+
+/**
+ @ingroup groupMath
+ */
+
+/**
+ @addtogroup BasicOffset
+ @{
+ */
+
+/**
+ @brief Adds a constant offset to a Q7 vector.
+ @param[in] pSrc points to the input vector
+ @param[in] offset is the offset to be added
+ @param[out] pDst points to the output vector
+ @param[in] blockSize number of samples in each vector
+ @return none
+
+ @par Scaling and Overflow Behavior
+ The function uses saturating arithmetic.
+ Results outside of the allowable Q7 range [0x80 0x7F] are saturated.
+ */
+#if defined(ARM_MATH_MVEI) && !defined(ARM_MATH_AUTOVECTORIZE)
+
+#include "arm_helium_utils.h"
+
+void arm_offset_q7(
+ const q7_t * pSrc,
+ q7_t offset,
+ q7_t * pDst,
+ uint32_t blockSize)
+{
+ uint32_t blkCnt; /* loop counters */
+ q7x16_t vecSrc;
+
+ /* Compute 16 outputs at a time */
+ blkCnt = blockSize >> 4;
+ while (blkCnt > 0U)
+ {
+ /*
+ * C = A + offset
+ * Add offset and then store the result in the destination buffer.
+ */
+ vecSrc = vld1q(pSrc);
+ vst1q(pDst, vqaddq(vecSrc, offset));
+ /*
+ * Decrement the blockSize loop counter
+ */
+ blkCnt--;
+ /*
+ * advance vector source and destination pointers
+ */
+ pSrc += 16;
+ pDst += 16;
+ }
+ /*
+ * tail
+ */
+ blkCnt = blockSize & 0xF;
+ if (blkCnt > 0U)
+ {
+ mve_pred16_t p0 = vctp8q(blkCnt);
+ vecSrc = vld1q(pSrc);
+ vstrbq_p(pDst, vqaddq(vecSrc, offset), p0);
+ }
+}
+
+#else
+void arm_offset_q7(
+ const q7_t * pSrc,
+ q7_t offset,
+ q7_t * pDst,
+ uint32_t blockSize)
+{
+ uint32_t blkCnt; /* Loop counter */
+
+#if defined (ARM_MATH_LOOPUNROLL)
+
+#if defined (ARM_MATH_DSP)
+ q31_t offset_packed; /* Offset packed to 32 bit */
+
+ /* Offset is packed to 32 bit in order to use SIMD32 for addition */
+ offset_packed = __PACKq7(offset, offset, offset, offset);
+#endif
+
+ /* Loop unrolling: Compute 4 outputs at a time */
+ blkCnt = blockSize >> 2U;
+
+ while (blkCnt > 0U)
+ {
+ /* C = A + offset */
+
+#if defined (ARM_MATH_DSP)
+ /* Add offset and store result in destination buffer (4 samples at a time). */
+ write_q7x4_ia (&pDst, __QADD8(read_q7x4_ia (&pSrc), offset_packed));
+#else
+ *pDst++ = (q7_t) __SSAT((q15_t) *pSrc++ + offset, 8);
+ *pDst++ = (q7_t) __SSAT((q15_t) *pSrc++ + offset, 8);
+ *pDst++ = (q7_t) __SSAT((q15_t) *pSrc++ + offset, 8);
+ *pDst++ = (q7_t) __SSAT((q15_t) *pSrc++ + offset, 8);
+#endif
+
+ /* 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 = A + offset */
+
+ /* Add offset and store result in destination buffer. */
+ *pDst++ = (q7_t) __SSAT((q15_t) *pSrc++ + offset, 8);
+
+ /* Decrement loop counter */
+ blkCnt--;
+ }
+
+}
+#endif /* defined(ARM_MATH_MVEI) */
+
+/**
+ @} end of BasicOffset group
+ */
--
cgit v1.2.3