* device/lib/Makefile.in: reenable floating point in model-xstack-auto

[fw/sdcc] / device / lib / _fs2sint.c

diff --git a/device/lib/_fs2sint.c b/device/lib/_fs2sint.c
index 9299872f9559668d785adad9def42c364ec9f30d..53f2e2d3da6092812068747fe3f8e3a0ffd08b93 100644 (file)
--- a/device/lib/_fs2sint.c
+++ b/device/lib/_fs2sint.c
@@ -1,11 +1,81 @@
-#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
+
+// int __fs2sint (float x)
+static void dummy(void) __naked
+{
+       __asm
+       .globl  ___fs2sint
+___fs2sint:
+       lcall   ___fs2slong
+       jnz fs2sint_not_zero
+       mov a, dpl
+       orl a, dph
+       orl a, b
+       jnz fs2sint_clr_a
+       ret
+fs2sint_clr_a:
+       clr a
+fs2sint_not_zero:
+       jnb     sign_a, fs2sint_pos
+fs2sint_neg:
+       cpl     a
+       jnz     fs2sint_maxval_neg
+       mov     a, b
+       cpl     a
+       jnz     fs2sint_maxval_neg
+       mov     a, dph
+       jnb     acc.7, fs2sint_maxval_neg
+       ret
+fs2sint_maxval_neg:
+       mov     dptr, #0x8000
+       ret
+fs2sint_pos:
+       jnz     fs2sint_maxval_pos
+       mov     a, b
+       jnz     fs2sint_maxval_pos
+       mov     a, dph
+       jb      acc.7, fs2sint_maxval_pos
+       ret
+fs2sint_maxval_pos:
+       mov     dptr, #0x7FFF
+       ret
+       __endasm;
+}
+
+#else
 
 /* convert float to signed int */
-signed int __fs2sint (float f) {
+signed int __fs2sint (float f)
+{
   signed long sl=__fs2slong(f);
-  if (sl>=SINT_MAX)
-    return SINT_MAX;
-  if (sl<=SINT_MIN) 
-    return -SINT_MIN;
+  if (sl>=INT_MAX)
+    return INT_MAX;
+  if (sl<=INT_MIN)
+    return -INT_MIN;
   return sl;
 }
+
+#endif