+/* Floating point library in optimized assembly for 8051
+ * Copyright (c) 2004, Paul Stoffregen, paul@pjrc.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, 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 program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+
+#define SDCC_FLOAT_LIB
+#include <float.h>
+
+
+#ifdef FLOAT_ASM_MCS51
+
+// char __fsgt (float a, float b) __reentrant
+static void dummy(void) __naked
+{
+ __asm
+ .globl ___fsgt
+___fsgt:
+ mov r7, a
+ mov r0, sp
+ dec r0
+ dec r0
+ lcall fs_check_negative_zeros
+ setb sign_a
+ rlc a
+ mov a, @r0
+ jc a_negative
+a_positive:
+ jnb acc.7, ab_positive
+ // a is positive and b is negative, so a > b
+ mov dpl, #1
+ ret
+a_negative:
+ jb acc.7, ab_negative
+ // a is negative and b is positive, so a < b
+ mov dpl, #0
+ ret
+ab_positive:
+ clr sign_a
+ab_negative:
+ lcall fs_compare_uint32
+ mov a, r1
+ jnz ab_different
+ // a and b are equal
+ mov dpl, a
+ ret
+ab_different:
+ jnb sign_a, skip_invert
+ cpl c
+skip_invert:
+ clr a
+ rlc a
+ mov dpl, a
+ ret
+ __endasm;
+}
+
+#else
+
/*
** libgcc support for software floating point.
** Copyright (C) 1991 by Pipeline Associates, Inc. All rights reserved.
/* (c)2000/2001: hacked a little by johan.knol@iduna.nl for sdcc */
-#include <float.h>
-
union float_long
{
float f;
fl1.f = a1;
fl2.f = a2;
- if (fl1.l<0 && fl2.l<0)
- {
- fl1.l ^= SIGNBIT;
- fl2.l ^= SIGNBIT;
- }
+ if (fl1.l<0 && fl2.l<0) {
+ if (fl2.l > fl1.l)
+ return (1);
+ return (0);
+ }
+
if (fl1.l > fl2.l)
return (1);
return (0);
}
+
+#endif