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

---
 .../Source/ControllerFunctions/arm_sin_cos_q31.c   | 110 +++++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 Drivers/CMSIS/DSP/Source/ControllerFunctions/arm_sin_cos_q31.c

(limited to 'Drivers/CMSIS/DSP/Source/ControllerFunctions/arm_sin_cos_q31.c')

diff --git a/Drivers/CMSIS/DSP/Source/ControllerFunctions/arm_sin_cos_q31.c b/Drivers/CMSIS/DSP/Source/ControllerFunctions/arm_sin_cos_q31.c
new file mode 100644
index 0000000..dcc45aa
--- /dev/null
+++ b/Drivers/CMSIS/DSP/Source/ControllerFunctions/arm_sin_cos_q31.c
@@ -0,0 +1,110 @@
+/* ----------------------------------------------------------------------
+ * Project:      CMSIS DSP Library
+ * Title:        arm_sin_cos_q31.c
+ * Description:  Cosine & Sine calculation for Q31 values
+ *
+ * $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"
+#include "arm_common_tables.h"
+
+/**
+  @ingroup groupController
+ */
+
+/**
+  @addtogroup SinCos
+  @{
+ */
+
+/**
+  @brief         Q31 sin_cos function.
+  @param[in]     theta    scaled input value in degrees
+  @param[out]    pSinVal  points to processed sine output
+  @param[out]    pCosVal  points to processed cosine output
+  @return        none
+
+  The Q31 input value is in the range [-1 0.999999] and is mapped to a degree value in the range [-180 179].
+ */
+
+void arm_sin_cos_q31(
+  q31_t theta,
+  q31_t * pSinVal,
+  q31_t * pCosVal)
+{
+  q31_t fract;                                     /* Temporary input, output variables */
+  uint16_t indexS, indexC;                         /* Index variable */
+  q31_t f1, f2, d1, d2;                            /* Two nearest output values */
+  q31_t Dn, Df;
+  q63_t temp;
+
+  /* Calculate the nearest index */
+  indexS = (uint32_t)theta >> CONTROLLER_Q31_SHIFT;
+  indexC = (indexS + 128) & 0x1ff;
+
+  /* Calculation of fractional value */
+  fract = (theta - (indexS << CONTROLLER_Q31_SHIFT)) << 8;
+
+  /* Read two nearest values of input value from the cos & sin tables */
+  f1 =  sinTable_q31[indexC  ];
+  f2 =  sinTable_q31[indexC+1];
+  d1 = -sinTable_q31[indexS  ];
+  d2 = -sinTable_q31[indexS+1];
+
+  Dn = 0x1921FB5; /* delta between the two points (fixed), in this case 2*pi/FAST_MATH_TABLE_SIZE */
+  Df = f2 - f1;   /* delta between the values of the functions */
+
+  temp = Dn * ((q63_t)d1 + d2);
+  temp = temp - ((q63_t)Df << 32);
+  temp = (q63_t)fract * (temp >> 31);
+  temp = temp + ((3 * (q63_t)Df << 31) - (d2 + ((q63_t)d1 << 1)) * Dn);
+  temp = (q63_t)fract * (temp >> 31);
+  temp = temp + (q63_t)d1 * Dn;
+  temp = (q63_t)fract * (temp >> 31);
+
+  /* Calculation of cosine value */
+  *pCosVal = clip_q63_to_q31((temp >> 31) + (q63_t)f1);
+
+  /* Read two nearest values of input value from the cos & sin tables */
+  f1 = sinTable_q31[indexS ];
+  f2 = sinTable_q31[indexS+1];
+  d1 = sinTable_q31[indexC ];
+  d2 = sinTable_q31[indexC+1];
+
+  Df = f2 - f1; // delta between the values of the functions
+  temp = Dn * ((q63_t)d1 + d2);
+  temp = temp - ((q63_t)Df << 32);
+  temp = (q63_t)fract * (temp >> 31);
+  temp = temp + ((3 * (q63_t)Df << 31) - (d2 + ((q63_t)d1 << 1)) * Dn);
+  temp = (q63_t)fract * (temp >> 31);
+  temp = temp + (q63_t)d1 * Dn;
+  temp = (q63_t)fract * (temp >> 31);
+
+  /* Calculation of sine value */
+  *pSinVal = clip_q63_to_q31((temp >> 31) + (q63_t)f1);
+}
+
+/**
+  @} end of SinCos group
+ */
-- 
cgit v1.2.3