added .h files for intel crc

openair1/PHY/CODING/crcext.h

+/*******************************************************************************
+ Copyright (c) 2009-2018, Intel Corporation
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+
+     * Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+     * Redistributions in binary form must reproduce the above copyright
+       notice, this list of conditions and the following disclaimer in the
+       documentation and/or other materials provided with the distribution.
+     * Neither the name of Intel Corporation nor the names of its contributors
+       may be used to endorse or promote products derived from this software
+       without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*******************************************************************************/
+
+/**
+ * Header file with CRC external definitions
+ *
+ */
+
+#ifndef __CRCEXT_H__
+#define __CRCEXT_H__
+
+#include <x86intrin.h>
+#include "types.h"
+/**
+ * Flag indicating availability of PCLMULQDQ instruction
+ * Only valid after running CRCInit() function.
+ */
+extern int pclmulqdq_available;
+
+/**
+ * Flag indicating availability of PCLMULQDQ instruction
+ * Only valid after running CRCInit() function.
+ */
+extern __m128i crc_xmm_be_le_swap128;
+extern const uint8_t crc_xmm_shift_tab[48];
+
+/**
+ * @brief Shifts right 128 bit register by specified number of bytes
+ *
+ * @param reg 128 bit value
+ * @param num number of bytes to shift right \a reg by (0-16)
+ *
+ * @return \a reg >> (\a num * 8)
+ */
+__forceinline
+__m128i xmm_shift_right(__m128i reg, const unsigned int num)
+{
+        const __m128i *p = (const __m128i *)(crc_xmm_shift_tab + 16 + num);
+
+        return _mm_shuffle_epi8(reg, _mm_loadu_si128(p));
+}
+
+/**
+ * @brief Shifts left 128 bit register by specified number of bytes
+ *
+ * @param reg 128 bit value
+ * @param num number of bytes to shift left \a reg by (0-16)
+ *
+ * @return \a reg << (\a num * 8)
+ */
+__forceinline
+__m128i xmm_shift_left(__m128i reg, const unsigned int num)
+{
+        const __m128i *p = (const __m128i *)(crc_xmm_shift_tab + 16 - num);
+
+        return _mm_shuffle_epi8(reg, _mm_loadu_si128(p));
+}
+
+/**
+ * @brief Initializes CRC module.
+ * @note It is mandatory to run it before using any of CRC API's.
+ */
+extern void CRCInit(void);
+
+#endif /* __CRCEXT_H__ */