+/* 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
+
+// unsigned long __fs2ulong (float x)
+static void dummy(void) __naked
+{
+ __asm
+ .globl ___fs2ulong
+___fs2ulong:
+ mov r7, #158
+ .globl fs2ulong_begin
+fs2ulong_begin:
+ lcall fsgetarg
+ jnb sign_a, fs2ulong_int
+ ljmp fs_return_zero
+
+fs2ulong_int:
+ clr c
+ mov a, r7
+ subb a, exp_a
+ jnc fs2ulong_int_ok
+ // if we get here, x >= 2^32
+ mov a, #0xFF
+ mov b, a
+ mov dph, a
+ mov dpl, a
+ ret
+
+fs2ulong_int_ok:
+ mov r1, #0
+ lcall fs_rshift_a
+
+fs2ulong_done:
+ mov dpl, r1
+ mov dph, r2
+ mov b, r3
+ mov a, r4
+ ret
+ __endasm;
+}
+
+#else
+
/*
** libgcc support for software floating point.
** Copyright (C) 1991 by Pipeline Associates, Inc. All rights reserved.
** uunet!motown!pipeline!phw
*/
-/* (c)2000: hacked a little by johan.knol@iduna.nl for sdcc */
-
-#include <limits.h>
+/* (c)2000/2001: hacked a little by johan.knol@iduna.nl for sdcc */
-/* the following deal with IEEE single-precision numbers */
-#define EXCESS 126
-#define SIGNBIT ((unsigned long)0x80000000)
-#define HIDDEN (unsigned long)(1 << 23)
-#define SIGN(fp) ((fp >> (8*sizeof(fp)-1)) & 1)
-#define EXP(fp) (((fp) >> 23) & (unsigned int) 0x00FF)
-#define MANT(fp) (((fp) & (unsigned long) 0x007FFFFF) | HIDDEN)
-#define PACK(s,e,m) ((s) | ((e) << 23) | (m))
union float_long
{
if (!fl1.l || SIGN(fl1.l))
return (0);
- if (a1>=ULONG_MAX)
- return ULONG_MAX;
-
exp = EXP (fl1.l) - EXCESS - 24;
l = MANT (fl1.l);
return l;
}
-
-
-
+#endif