* Makefile.in, configure.in, configure,

[fw/sdcc] / device / lib / _fs2schar.c

diff --git a/device/lib/_fs2schar.c b/device/lib/_fs2schar.c
index 0fc8c9894ac476a1794312eb2db01dc0e88666d8..b9b6ac6d4f6820b70eca2f7ab09b96475cdf3ada 100644 (file)
--- a/device/lib/_fs2schar.c
+++ b/device/lib/_fs2schar.c
@@ -1,11 +1,87 @@
-#include <_float.h>
+/* 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 __fs2schar (float x)
+static void dummy(void) __naked
+{
+       __asm
+       .globl  ___fs2schar
+___fs2schar:
+       lcall   ___fs2slong
+       jnz     fs2schar_not_zero
+       mov     a, dpl
+       orl     a, dph
+       orl     a, b
+       jnz     fs2schar_clr_a
+       ret
+fs2schar_clr_a:
+       clr a
+fs2schar_not_zero:
+       jnb     sign_a, fs2schar_pos
+fs2schar_neg:
+       cpl     a
+       jnz     fs2schar_maxval_neg
+       mov     a, b
+       cpl     a
+       jnz     fs2schar_maxval_neg
+       mov     a, dph
+       cpl     a
+       jnz     fs2schar_maxval_neg
+       mov     a, dpl
+       jnb     acc.7, fs2schar_maxval_neg
+       ret
+fs2schar_maxval_neg:
+       mov     dpl, #0x80
+       ret
+fs2schar_pos:
+       jnz     fs2schar_maxval_pos
+       mov     a, b
+       jnz     fs2schar_maxval_pos
+       mov     a, dph
+       jnz     fs2schar_maxval_pos
+       mov     a, dpl
+       jb      acc.7, fs2schar_maxval_pos
+       ret
+fs2schar_maxval_pos:
+       mov     dpl, #0x7F
+       ret
+       __endasm;
+}
+
+#else
 
 /* convert float to signed char */
-signed char __fs2schar (float f) {
+signed char __fs2schar (float f)
+{
   signed long sl=__fs2slong(f);
-  if (sl>=SCHAR_MAX)
-    return SCHAR_MAX;
-  if (sl<=SCHAR_MIN) 
-    return -SCHAR_MIN;
+  if (sl>=CHAR_MAX)
+    return CHAR_MAX;
+  if (sl<=CHAR_MIN)
+    return -CHAR_MIN;
   return sl;
 }
+
+#endif