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/* -*- Mode: Asm -*- */
/* Copyright (c) 2002 Michael Stumpf <mistumpf@de.pepperl-fuchs.com>
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
* Neither the name of the copyright holders nor the names of
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
/*
fmod.S is part of FPlib V 0.3.0 ported to avr-as
for details see readme.fplib
*----------------------------------------------------------------------------------------
* A = remainder( A/B )
*/
#if !defined(DOXYGEN)
#include "gasava.inc"
#include "fplib.inc"
TEXT_SEG(fplib, fmod)
FUNCTION(fmod)
GLOBAL(fmod)
/* fmod = x % y = x - (floor)(x/y)*y ??
*
* fmod x 10.5 -10.5
* y PI 1.075.. -1.075..
* -PI 1.075.. -1.075..
*/
ANDI rB3,0x7F ; fmod(x,y) = sgn(x) * fmod(|x|,|y|)
TST rB3 ; -0 ?
BRNE _fmod_01
TST rB2
BRMI _fmod_01
RJMP _U(__fp_nanERANGE)
_fmod_01:
PUSH rB0
PUSH rB1
PUSH rB2
PUSH rB3
RCALL _U(__divsf3) ; A = x/y
CLR rP4
CLR rP5 ; point to NUL
RCALL _U(modf) ; A = fraction( x/y )
POP rB3
POP rB2
POP rB1
POP rB0 ; B = y
RJMP _U(__mulsf3) ; A = y * fraction( x/y )
ENDFUNC
#endif /* not DOXYGEN */
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