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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