* device/include/pic16/pic18f*.h: add bit aliases in INTCONbits_t

[fw/sdcc] / device / lib / _fs2ulong.c

diff --git a/device/lib/_fs2ulong.c b/device/lib/_fs2ulong.c
index bdff3c7621d82261493d0a26f3b7778c3d198a81..e792fd17174ac926c1375b6b4a40895cb63b8910 100644 (file)
--- a/device/lib/_fs2ulong.c
+++ b/device/lib/_fs2ulong.c
@@ -1,3 +1,68 @@
+/* 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.
@@ -14,18 +79,8 @@
 ** uunet!motown!pipeline!phw
 */
 
-/* (c)2000: hacked a little by johan.knol@iduna.nl for sdcc */
-
-#include <_float.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
 {
@@ -46,9 +101,6 @@ __fs2ulong (float a1)
   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);
   
@@ -57,6 +109,4 @@ __fs2ulong (float a1)
   return l;
 }
 
-
-
-
+#endif