mirror of https://gitee.com/openkylin/linux.git
154 lines
2.7 KiB
C
154 lines
2.7 KiB
C
|
/*
|
||
|
|
* include/asm-xtensa/asmmacro.h
|
||
|
|
*
|
||
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
||
|
|
* License. See the file "COPYING" in the main directory of this archive
|
||
|
|
* for more details.
|
||
|
|
*
|
||
|
|
* Copyright (C) 2005 Tensilica Inc.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _XTENSA_ASMMACRO_H
|
||
|
|
#define _XTENSA_ASMMACRO_H
|
||
|
|
|
||
|
|
#include <asm/variant/core.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Some little helpers for loops. Use zero-overhead-loops
|
||
|
|
* where applicable and if supported by the processor.
|
||
|
|
*
|
||
|
|
* __loopi ar, at, size, inc
|
||
|
|
* ar register initialized with the start address
|
||
|
|
* at scratch register used by macro
|
||
|
|
* size size immediate value
|
||
|
|
* inc increment
|
||
|
|
*
|
||
|
|
* __loops ar, as, at, inc_log2[, mask_log2][, cond][, ncond]
|
||
|
|
* ar register initialized with the start address
|
||
|
|
* as register initialized with the size
|
||
|
|
* at scratch register use by macro
|
||
|
|
* inc_log2 increment [in log2]
|
||
|
|
* mask_log2 mask [in log2]
|
||
|
|
* cond true condition (used in loop'cond')
|
||
|
|
* ncond false condition (used in b'ncond')
|
||
|
|
*
|
||
|
|
* __loop as
|
||
|
|
* restart loop. 'as' register must not have been modified!
|
||
|
|
*
|
||
|
|
* __endla ar, at, incr
|
||
|
|
* ar start address (modified)
|
||
|
|
* as scratch register used by macro
|
||
|
|
* inc increment
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* loop for given size as immediate
|
||
|
|
*/
|
||
|
|
|
||
|
|
.macro __loopi ar, at, size, incr
|
||
|
|
|
||
|
|
#if XCHAL_HAVE_LOOPS
|
||
|
|
movi \at, ((\size + \incr - 1) / (\incr))
|
||
|
|
loop \at, 99f
|
||
|
|
#else
|
||
|
|
addi \at, \ar, \size
|
||
|
|
98:
|
||
|
|
#endif
|
||
|
|
|
||
|
|
.endm
|
||
|
|
|
||
|
|
/*
|
||
|
|
* loop for given size in register
|
||
|
|
*/
|
||
|
|
|
||
|
|
.macro __loops ar, as, at, incr_log2, mask_log2, cond, ncond
|
||
|
|
|
||
|
|
#if XCHAL_HAVE_LOOPS
|
||
|
|
.ifgt \incr_log2 - 1
|
||
|
|
addi \at, \as, (1 << \incr_log2) - 1
|
||
|
|
.ifnc \mask_log2,
|
||
|
|
extui \at, \at, \incr_log2, \mask_log2
|
||
|
|
.else
|
||
|
|
srli \at, \at, \incr_log2
|
||
|
|
.endif
|
||
|
|
.endif
|
||
|
|
loop\cond \at, 99f
|
||
|
|
#else
|
||
|
|
.ifnc \mask_log2,
|
||
|
|
extui \at, \as, \incr_log2, \mask_log2
|
||
|
|
.else
|
||
|
|
.ifnc \ncond,
|
||
|
|
srli \at, \as, \incr_log2
|
||
|
|
.endif
|
||
|
|
.endif
|
||
|
|
.ifnc \ncond,
|
||
|
|
b\ncond \at, 99f
|
||
|
|
|
||
|
|
.endif
|
||
|
|
.ifnc \mask_log2,
|
||
|
|
slli \at, \at, \incr_log2
|
||
|
|
add \at, \ar, \at
|
||
|
|
.else
|
||
|
|
add \at, \ar, \as
|
||
|
|
.endif
|
||
|
|
#endif
|
||
|
|
98:
|
||
|
|
|
||
|
|
.endm
|
||
|
|
|
||
|
|
/*
|
||
|
|
* loop from ar to ax
|
||
|
|
*/
|
||
|
|
|
||
|
|
.macro __loopt ar, as, at, incr_log2
|
||
|
|
|
||
|
|
#if XCHAL_HAVE_LOOPS
|
||
|
|
sub \at, \as, \ar
|
||
|
|
.ifgt \incr_log2 - 1
|
||
|
|
addi \at, \at, (1 << \incr_log2) - 1
|
||
|
|
srli \at, \at, \incr_log2
|
||
|
|
.endif
|
||
|
|
loop \at, 99f
|
||
|
|
#else
|
||
|
|
98:
|
||
|
|
#endif
|
||
|
|
|
||
|
|
.endm
|
||
|
|
|
||
|
|
/*
|
||
|
|
* restart loop. registers must be unchanged
|
||
|
|
*/
|
||
|
|
|
||
|
|
.macro __loop as
|
||
|
|
|
||
|
|
#if XCHAL_HAVE_LOOPS
|
||
|
|
loop \as, 99f
|
||
|
|
#else
|
||
|
|
98:
|
||
|
|
#endif
|
||
|
|
|
||
|
|
.endm
|
||
|
|
|
||
|
|
/*
|
||
|
|
* end of loop with no increment of the address.
|
||
|
|
*/
|
||
|
|
|
||
|
|
.macro __endl ar, as
|
||
|
|
#if !XCHAL_HAVE_LOOPS
|
||
|
|
bltu \ar, \as, 98b
|
||
|
|
#endif
|
||
|
|
99:
|
||
|
|
.endm
|
||
|
|
|
||
|
|
/*
|
||
|
|
* end of loop with increment of the address.
|
||
|
|
*/
|
||
|
|
|
||
|
|
.macro __endla ar, as, incr
|
||
|
|
addi \ar, \ar, \incr
|
||
|
|
__endl \ar \as
|
||
|
|
.endm
|
||
|
|
|
||
|
|
|
||
|
|
#endif /* _XTENSA_ASMMACRO_H */
|