1 /******************************************************************************
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31 ******************************************************************************/
32 /*****************************************************************************/
37 * Contains I/O functions for memory-mapped or non-memory-mapped I/O
42 * This file contains architecture-dependent code.
45 * MODIFICATION HISTORY:
47 * Ver Who Date Changes
48 * ----- -------- -------- -----------------------------------------------
49 * 5.00 pkp 05/29/14 First release
51 ******************************************************************************/
54 /***************************** Include Files *********************************/
56 #include "xil_types.h"
57 #include "xil_assert.h"
59 /*****************************************************************************/
62 * @brief Perform a 16-bit endian converion.
64 * @param Data: 16 bit value to be converted
66 * @return 16 bit Data with converted endianess
68 ******************************************************************************/
69 u16 Xil_EndianSwap16(u16 Data)
71 return (u16) (((Data & 0xFF00U) >> 8U) | ((Data & 0x00FFU) << 8U));
74 /*****************************************************************************/
77 * @brief Perform a 32-bit endian converion.
79 * @param Data: 32 bit value to be converted
81 * @return 32 bit data with converted endianess
83 ******************************************************************************/
84 u32 Xil_EndianSwap32(u32 Data)
89 /* get each of the half words from the 32 bit word */
91 LoWord = (u16) (Data & 0x0000FFFFU);
92 HiWord = (u16) ((Data & 0xFFFF0000U) >> 16U);
94 /* byte swap each of the 16 bit half words */
96 LoWord = (((LoWord & 0xFF00U) >> 8U) | ((LoWord & 0x00FFU) << 8U));
97 HiWord = (((HiWord & 0xFF00U) >> 8U) | ((HiWord & 0x00FFU) << 8U));
99 /* swap the half words before returning the value */
101 return ((((u32)LoWord) << (u32)16U) | (u32)HiWord);