X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=device%2Flib%2F_slong2fs.c;h=b19c59c2efe23512e7c789109b47883e6e5ba1ad;hb=5e539f4e7015f13bf14fde95e5e4d51f41475e66;hp=394fba874f8dbbb3fdad4856acc1bfc55db91372;hpb=61da3cca8ba3e73617d60a8a50b31e541af74103;p=fw%2Fsdcc

diff --git a/device/lib/_slong2fs.c b/device/lib/_slong2fs.c
index 394fba87..b19c59c2 100644
--- a/device/lib/_slong2fs.c
+++ b/device/lib/_slong2fs.c
@@ -1,5 +1,70 @@
+/* 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 __slong2fs (long x)
+static void dummy(void) __naked
+{
+	__asm
+	.globl	___slong2fs
+___slong2fs:
+	mov	r4, a
+	mov	r3, b
+	mov	r2, dph
+	mov	r1, dpl
+	mov	a, #158
+	.globl	slong2fs_doit
+slong2fs_doit:
+	mov	exp_a, a
+	clr	sign_a
+	mov	a, r4
+	jnb	acc.7, slong2fs_positive
+	setb	sign_a
+	mov	a, r1
+	cpl	a
+	add	a, #1
+	mov	r1, a
+	mov	a, r2
+	cpl	a
+	addc	a, #0
+	mov	r2, a
+	mov	a, r3
+	cpl	a
+	addc	a, #0
+	mov	r3, a
+	mov	a, r4
+	cpl	a
+	addc	a, #0
+	mov	r4, a
+slong2fs_positive:
+	lcall	fs_normalize_a
+	ljmp	fs_round_and_return
+	__endasm;
+}
+
+#else
+
 /* convert signed long to float */
 float __slong2fs (signed long sl) {
   if (sl<0) 
@@ -7,3 +72,5 @@ float __slong2fs (signed long sl) {
   else 
     return __ulong2fs(sl);
 }
+
+#endif