text: /*
   * Copyright (C) 2005 - 2013 Tensilica Inc.
   * Copyright (C) 2014 - 2016 Cadence Design Systems Inc.
   *
   * SPDX-License-Identifier:	GPL-2.0+
   */
  
  #ifndef _XTENSA_ASMMACRO_H
  #define _XTENSA_ASMMACRO_H
  
  #include <asm/arch/core.h>
  
  /*
   * Function entry and return macros for supported ABIs.
   */
  
  #if defined(__XTENSA_WINDOWED_ABI__)
  #define abi_entry	entry	sp, 16
  #define abi_ret		retw
  #elif defined(__XTENSA_CALL0_ABI__)
  #define abi_entry
  #define abi_ret		ret
  #else
  #error Unsupported Xtensa ABI
  #endif
  
  /*
   * 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, as, incr
   *	   ar	start address (modified)
   *	   as	scratch register used by __loops/__loopi macros or
   *		end address used by __loopt macro
   *	   inc	increment
   */
  
  #if XCHAL_HAVE_LOOPS
  
  .macro	__loopi ar, at, size, incr
  	movi	\at, ((\size + \incr - 1) / (\incr))
  	loop	\at, 99f
  .endm
  
  
  .macro	__loops	ar, as, at, incr_log2, mask_log2, cond, ncond
  	.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
  .endm
  
  
  .macro	__loopt	ar, as, at, incr_log2
  	sub	\at, \as, \ar
  	.ifgt	\incr_log2 - 1
  		addi	\at, \at, (1 << \incr_log2) - 1
  		srli	\at, \at, \incr_log2
  	.endif
  	loop	\at, 99f
  .endm
  
  
  .macro	__loop	as
  	loop	\as, 99f
  .endm
  
  
  .macro	__endl	ar, as
  99:
  .endm
  
  
  #else
  
  .macro	__loopi ar, at, size, incr
  	movi	\at, ((\size + \incr - 1) / (\incr))
  	addi	\at, \ar, \size
  98:
  .endm
  
  
  .macro	__loops	ar, as, at, incr_log2, mask_log2, cond, ncond
  	.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
  98:
  .endm
  
  .macro	__loopt	ar, as, at, incr_log2
  98:
  .endm
  
  
  .macro	__loop	as
  98:
  .endm
  
  
  .macro	__endl	ar, as
  	bltu	\ar, \as, 98b
  99:
  .endm
  
  
  #endif
  
  
  .macro	__endla	ar, as, incr
  	addi	\ar, \ar, \incr
  	__endl	\ar \as
  .endm
  
  
  #endif /* _XTENSA_ASMMACRO_H */
  