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/**
* @file
*
* @ingroup mpc55xx_asm
*
* @brief Memory copy functions.
*/
/*
* Copyright (c) 2008
* Embedded Brains GmbH
* Obere Lagerstr. 30
* D-82178 Puchheim
* Germany
* rtems@embedded-brains.de
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#include <libcpu/powerpc-utility.h>
#include <bspopts.h>
.section ".bsp_start_text", "ax"
/**
* @fn int mpc55xx_copy_8( const void *src, void *dest, size_t n)
*
* @brief Copy @a n bytes from @a src to @a dest with 8 byte reads and writes.
*
* The memory areas should not overlap. The addresses @a src and @a dest have
* to be aligned on 8 byte boundaries. The size @a n must be evenly divisible by 8.
* The SPE operations @b evxor, @b evlddx and @b evstddx will be used.
*/
#if ((MPC55XX_CHIP_TYPE>=5510) && (MPC55XX_CHIP_TYPE<=5517))
GLOBAL_FUNCTION mpc55xx_copy_8
#endif /* ((MPC55XX_CHIP_TYPE>=5510) && (MPC55XX_CHIP_TYPE<=5517)) */
GLOBAL_FUNCTION mpc55xx_copy_4
/* Loop counter = data size / 4 */
srwi. r5, r5, 2
beqlr
mtctr r5
xor r5,r5,r5
copy_data4:
lwzx r6, r5, r3
stwx r6, r5, r4
addi r5, r5, 4
bdnz copy_data4
/* Return */
blr
#if !((MPC55XX_CHIP_TYPE>=5510) && (MPC55XX_CHIP_TYPE<=5517))
/**
* @fn int mpc55xx_copy_8( const void *src, void *dest, size_t n)
*
* @brief Copy @a n bytes from @a src to @a dest with 8 byte reads and writes.
*
* The memory areas should not overlap. The addresses @a src and @a dest have
* to be aligned on 8 byte boundaries. The size @a n must be evenly divisible by 8.
* The SPE operations @b evxor, @b evlddx and @b evstddx will be used.
*/
GLOBAL_FUNCTION mpc55xx_copy_8
/* Loop counter = data size / 8 */
srwi. r5, r5, 3
beqlr
mtctr r5
/* Set offset */
evxor r5, r5, r5
copy_data:
evlddx r6, r3, r5
evstddx r6, r4, r5
addi r5, r5, 8
bdnz copy_data
/* Return */
blr
#endif /*!((MPC55XX_CHIP_TYPE>=5510) && (MPC55XX_CHIP_TYPE<=5517))*/
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