fp64_swapAB.S

/* Copyright (c) 2020  Uwe Bissinger
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   modification, are permitted provided that the following conditions are met:

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     distribution.
   * Neither the name of the copyright holders nor the names of
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     from this software without specific prior written permission.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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/* $Id$ */

#include "fp64def.h"
#include "asmdef.h"

/*  __fp64_swapAB() swap A and B
   Input:
     rAE1.rAE0.rA7.rA6.rA5.rA4.rA3.rA2.rA1.rA0  - A
     rBE1.rBE0.rB7.rB6.rB5.rB4.rB3.rB2.rB1.rB0  - B
   Return:
     rAE1.rAE0.rA7.rA6.rA5.rA4.rA3.rA2.rA1.rA0  - now B
     rBE1.rBE0.rB7.rB6.rB5.rB4.rB3.rB2.rB1.rB0  - now A
	Modifies:
	 nothing - also SREG is preserved
 */

FUNCTION __fp64_swapAB
ENTRY __fp64_swapAB
	push r0
	push r1
	_SWAPW rAE0, rBE0		
	_SWAPW rA0, rB0
	_SWAPW rA2, rB2
	_SWAPW rA4, rB4
	_SWAPW rA6, rB6
	pop r1
	pop r0
	ret
ENDFUNC