1 /* Floating point library in optimized assembly for 8051
2 * Copyright (c) 2004, Paul Stoffregen, paul@pjrc.com
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 #define SDCC_FLOAT_LIB
25 #ifdef FLOAT_ASM_MCS51
27 static void dummy(void) _naked
31 .globl fs_round_and_return
33 #ifdef FLOAT_FULL_ACCURACY
34 // discard the extra 8 bits of precision we kept around in r1
40 jc fs_zerocheck_return
50 jnc fs_zerocheck_return
55 .globl fs_zerocheck_return
57 // zero output is a special case
58 cjne r4, #0, fs_direct_return
59 cjne r3, #0, fs_direct_return
60 cjne r2, #0, fs_direct_return
70 .globl fs_direct_return
72 // collect all pieces and return