X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=device%2Flib%2F_fsgt.c;h=53df3022c473ee018491903e0251a81d81d4c664;hb=503506adabdfdde204ab0fc7daeed9f9105ca460;hp=d5a67a0e39faed8678c3964704cf5835d6268c6e;hpb=2bd431e7a223c68745ba997cb059c44a437c7325;p=fw%2Fsdcc

diff --git a/device/lib/_fsgt.c b/device/lib/_fsgt.c
index d5a67a0e..53df3022 100644
--- a/device/lib/_fsgt.c
+++ b/device/lib/_fsgt.c
@@ -1,3 +1,75 @@
+/* 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 __fsgt (float a, float b) __reentrant
+static void dummy(void) __naked
+{
+	__asm
+	.globl	___fsgt
+___fsgt:
+	mov	r7, a
+	mov	r0, sp
+	dec	r0
+	dec	r0
+	lcall	fs_check_negative_zeros
+	setb	sign_a
+	rlc	a
+	mov	a, @r0
+	jc	a_negative
+a_positive:
+	jnb	acc.7, ab_positive
+	// a is positive and b is negative, so a > b
+	mov	dpl, #1
+	ret
+a_negative:
+	jb	acc.7, ab_negative
+	// a is negative and b is positive, so a < b
+	mov	dpl, #0
+	ret
+ab_positive:
+	clr	sign_a
+ab_negative:
+	lcall	fs_compare_uint32
+	mov	a, r1
+	jnz	ab_different
+	// a and b are equal
+	mov	dpl, a
+	ret
+ab_different:
+	jnb	sign_a, skip_invert
+	cpl	c
+skip_invert:
+	clr	a
+	rlc	a
+	mov	dpl, a
+	ret
+	__endasm;
+}
+
+#else
+
 /*
 ** libgcc support for software floating point.
 ** Copyright (C) 1991 by Pipeline Associates, Inc.  All rights reserved.
@@ -16,8 +88,6 @@
 
 /* (c)2000/2001: hacked a little by johan.knol@iduna.nl for sdcc */
 
-#include <float.h>
-
 union float_long
   {
     float f;
@@ -32,15 +102,15 @@ char __fsgt (float a1, float a2)
   fl1.f = a1;
   fl2.f = a2;
 
-#if 0
-  if (fl1.l<0 && fl2.l<0)
-    {
-      fl1.l ^= SIGNBIT;
-      fl2.l ^= SIGNBIT;
-    }
-#endif
+  if (fl1.l<0 && fl2.l<0) {
+    if (fl2.l > fl1.l)
+      return (1);
+    return (0);
+  }
 
   if (fl1.l > fl2.l)
     return (1);
   return (0);
 }
+
+#endif