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/*-------------------------------------------------------------------------
_fscmp.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
static void dummy(void) __naked
{
__asm
.globl fs_compare_uint32
fs_compare_uint32:
mov r1, #1
mov r2, dpl
mov a, @r0
mov dpl, r7
cjne a, dpl, compare32_done
dec r0
mov a, @r0
cjne a, b, compare32_done
dec r0
mov a, @r0
cjne a, dph, compare32_done
dec r0
mov a, @r0
mov dpl, r2
cjne a, dpl, compare32_done
mov r1, #0
compare32_done:
ret
.globl fs_check_negative_zeros
fs_check_negative_zeros:
a_check:
cjne a, #0x80, a_not_neg_zero
mov a, b
jnz a_not_neg_zero_cleanup
mov a, dph
jnz a_not_neg_zero_cleanup
mov a, dpl
jnz a_not_neg_zero_cleanup
mov r7, #0
a_not_neg_zero_cleanup:
mov a, r7
a_not_neg_zero:
b_check:
cjne @r0, #0x80, b_not_neg_zero
dec r0
cjne @r0, #0, b_not_neg_zero_cleanup_1
dec r0
cjne @r0, #0, b_not_neg_zero_cleanup_2
dec r0
cjne @r0, #0, b_not_neg_zero_cleanup_3
inc r0
inc r0
inc r0
mov @r0, #0
ret
b_not_neg_zero_cleanup_3:
inc r0
b_not_neg_zero_cleanup_2:
inc r0
b_not_neg_zero_cleanup_1:
inc r0
b_not_neg_zero:
ret
__endasm;
}
#endif
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