* src/SDCCval.c, src/SDCCmain.c, device/include/limits.h,

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

diff --git a/device/lib/_fs2schar.c b/device/lib/_fs2schar.c
index 0fc8c9894ac476a1794312eb2db01dc0e88666d8..70b532885b774324b82d70cb237b0e85eb25c2b0 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) 
+  if (sl<=SCHAR_MIN)
     return -SCHAR_MIN;
   return sl;
 }
+
+#endif