Applied patch #2762516

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

diff --git a/device/lib/_fssub.c b/device/lib/_fssub.c
index b9f453fb3a1d38ea7b8277929965ff232fa44201..114ffc041c946086d1c6ea43d7fd129bbd838034 100644 (file)
--- a/device/lib/_fssub.c
+++ b/device/lib/_fssub.c
@@ -1,3 +1,46 @@
+/* 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
+
+//float __fssub (float a, float b) __reentrant
+static void dummy(void) __naked
+{
+       __asm
+       .globl  ___fssub
+___fssub:
+       mov     r0, sp
+       dec     r0
+       dec     r0
+       xch     a, @r0
+       cpl     acc.7
+       xch     a, @r0
+       ljmp    ___fsadd
+       __endasm;
+}
+
+#else
+
 /*
 ** libgcc support for software floating point.
 ** Copyright (C) 1991 by Pipeline Associates, Inc.  All rights reserved.
@@ -16,8 +59,6 @@
 
 /* (c)2000/2001: hacked a little by johan.knol@iduna.nl for sdcc */
 
-#include <float.h>
-
 union float_long
   {
     float f;
@@ -42,3 +83,5 @@ float __fssub (float a1, float a2)
   fl2.l ^= SIGNBIT;
   return fl1.f + fl2.f; 
 }
+
+#endif