sdcc-3.9.0 fork implementing GNU assembler syntax

This fork aims to provide better support for stm8-binutils

1 files changed, 86 insertions, 0 deletions

diff --git a/device/lib/_slong2fs.c b/device/lib/_slong2fs.c
new file mode 100644
index 0000000..26c9161
--- /dev/null
+++ b/device/lib/_slong2fs.c
@@ -0,0 +1,86 @@
+/*-------------------------------------------------------------------------
+   _slong2fs.c - Floating point library in optimized assembly for 8051
+ 
+   Copyright (C) 2004, Paul Stoffregen, paul@pjrc.com
+
+   This library is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published by the
+   Free Software Foundation; either version 2, 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 library; see the file COPYING. If not, write to the
+   Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
+   MA 02110-1301, USA.
+
+   As a special exception, if you link this library with other files,
+   some of which are compiled with SDCC, to produce an executable,
+   this library does not by itself cause the resulting executable to
+   be covered by the GNU General Public License. This exception does
+   not however invalidate any other reasons why the executable file
+   might be covered by the GNU General Public License.
+-------------------------------------------------------------------------*/
+
+
+#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) 
+    return -__ulong2fs(-sl);
+  else 
+    return __ulong2fs(sl);
+}
+
+#endif