add cvimath

commit ce8705f49da5e5f59c2ddb3253ef88323a0cd9c4
Author: sophgo-forum-service <forum_service@sophgo.com>
Date:   Mon May 13 14:04:10 2024 +0800

    [feat] cvimath opensource for cv18xx soc.

    - 9e8967

cvimath/include/cvimath.h

@@ -0,0 +1,84 @@
+#ifndef CVIMATH_H
+#define CVIMATH_H
+
+#include <stdint.h>
+
+// public function
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief This function calculated the unit length of a precahed i8 feature array
+ *
+ * @param precached Prefetched feature array in 1-D. Format: feature1, feature2, ...
+ * @param unit_precached_arr Output unit length.
+ * @param data_length The length of the feature.
+ * @param data_num The number of features.
+ */
+void cvm_gen_precached_i8_unit_length(int8_t *precached, float *unit_precached_arr,
+                                      const uint32_t data_length, const uint32_t data_num);
+
+/**
+ * @brief This function calculated the unit length of a precahed u8 feature array
+ *
+ * @param precached Prefetched feature array in 1-D. Format: feature1, feature2, ...
+ * @param unit_precached_arr Output unit length.
+ * @param data_length The length of the feature.
+ * @param data_num The number of features.
+ */
+void cvm_gen_precached_u8_unit_length(uint8_t *precached, float *unit_precached_arr,
+                                      const uint32_t data_length, const uint32_t data_num);
+
+/**
+ * @brief Do inner product matching on i8 feature with given precached feature array.
+ *
+ * @param feature The input i8 feature to be compared.
+ * @param precached The precached feature array in 1-D.
+ * @param unit_precached_arr The unit length array of the precached.
+ * @param k_index The output matching index result in order.
+ * @param k_value The output matching value result in order.
+ * @param buffer The buffer used by this function, same length as precached.
+ * @param data_length The length of the single feature.
+ * @param data_num The number of features of the feature array.
+ * @param k Top k results, affects the length of k_index and k_value.
+ */
+void cvm_cpu_i8data_ip_match(int8_t *feature, int8_t *precached, float *unit_precached_arr,
+                             uint32_t *k_index, float *k_value, float *buffer,
+                             const uint32_t data_length, const uint32_t data_num, const uint32_t k);
+
+/**
+ * @brief Do inner product matching on u8 feature with given precached feature array.
+ *
+ * @param feature The input u8 feature to be compared.
+ * @param precached The precached feature array in 1-D.
+ * @param unit_precached_arr The unit length array of the precached.
+ * @param k_index The output matching index result in order.
+ * @param k_value The output matching value result in order.
+ * @param buffer The buffer used by this function, same length as precached.
+ * @param data_length The length of the single feature.
+ * @param data_num The number of features of the feature array.
+ * @param k Top k results, affects the length of k_index and k_value.
+ */
+void cvm_cpu_u8data_ip_match(uint8_t *feature, uint8_t *precached, float *unit_precached_arr,
+                             uint32_t *k_index, float *k_value, float *buffer,
+                             const uint32_t data_length, const uint32_t data_num, const uint32_t k);
+
+// Legacy support for hj.
+inline void __attribute__((always_inline))
+cvm_gen_db_i8_unit_length(int8_t *precached, float *unit_precached_arr, const uint32_t data_length,
+                          const uint32_t data_num) {
+  cvm_gen_precached_i8_unit_length(precached, unit_precached_arr, data_length, data_num);
+}
+
+inline void __attribute__((always_inline))
+cvm_gen_db_unit_length(uint8_t *precached, float *unit_precached_arr, const uint32_t data_length,
+                       const uint32_t data_num) {
+  cvm_gen_precached_u8_unit_length(precached, unit_precached_arr, data_length, data_num);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  // CVIMATH_H