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/*-------------------------------------------------------------------------
_fs2sint.c - Floating point library in optimized assembly for 8051
Copyright (c) 2004, Paul Stoffregen, paul@pjrc.com
This library is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this library; see the file COPYING. If not, write to the
Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301, USA.
As a special exception, if you link this library with other files,
some of which are compiled with SDCC, to produce an executable,
this library does not by itself cause the resulting executable to
be covered by the GNU General Public License. This exception does
not however invalidate any other reasons why the executable file
might be covered by the GNU General Public License.
-------------------------------------------------------------------------*/
#define __SDCC_FLOAT_LIB
#include <float.h>
#ifdef FLOAT_ASM_MCS51
// int __fs2sint (float x)
static void dummy(void) __naked
{
__asm
.globl ___fs2sint
___fs2sint:
lcall ___fs2slong
jnz fs2sint_not_zero
mov a, dpl
orl a, dph
orl a, b
jnz fs2sint_clr_a
ret
fs2sint_clr_a:
clr a
fs2sint_not_zero:
jnb sign_a, fs2sint_pos
fs2sint_neg:
cpl a
jnz fs2sint_maxval_neg
mov a, b
cpl a
jnz fs2sint_maxval_neg
mov a, dph
jnb acc.7, fs2sint_maxval_neg
ret
fs2sint_maxval_neg:
mov dptr, #0x8000
ret
fs2sint_pos:
jnz fs2sint_maxval_pos
mov a, b
jnz fs2sint_maxval_pos
mov a, dph
jb acc.7, fs2sint_maxval_pos
ret
fs2sint_maxval_pos:
mov dptr, #0x7FFF
ret
__endasm;
}
#else
/* convert float to signed int */
signed int __fs2sint (float f)
{
signed long sl=__fs2slong(f);
if (sl>=INT_MAX)
return INT_MAX;
if (sl<=INT_MIN)
return -INT_MIN;
return sl;
}
#endif
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