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/*-------------------------------------------------------------------------
_slong2fs.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
//float __slong2fs (long x)
static void dummy(void) __naked
{
__asm
.globl ___slong2fs
___slong2fs:
mov r4, a
mov r3, b
mov r2, dph
mov r1, dpl
mov a, #158
.globl slong2fs_doit
slong2fs_doit:
mov exp_a, a
clr sign_a
mov a, r4
jnb acc.7, slong2fs_positive
setb sign_a
mov a, r1
cpl a
add a, #1
mov r1, a
mov a, r2
cpl a
addc a, #0
mov r2, a
mov a, r3
cpl a
addc a, #0
mov r3, a
mov a, r4
cpl a
addc a, #0
mov r4, a
slong2fs_positive:
lcall fs_normalize_a
ljmp fs_round_and_return
__endasm;
}
#else
/* convert signed long to float */
float __slong2fs (signed long sl) {
if (sl<0)
return -__ulong2fs(-sl);
else
return __ulong2fs(sl);
}
#endif
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