sdcc-3.9.0 fork implementing GNU assembler syntax

This fork aims to provide better support for stm8-binutils

1 files changed, 122 insertions, 0 deletions

diff --git a/device/lib/_fs2ulong.c b/device/lib/_fs2ulong.c
new file mode 100644
index 0000000..2d43291
--- /dev/null
+++ b/device/lib/_fs2ulong.c
@@ -0,0 +1,122 @@
+/*-------------------------------------------------------------------------
+   _fs2ulong.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
+
+// unsigned long __fs2ulong (float x)
+static void dummy(void) __naked
+{
+	__asm
+	.globl	___fs2ulong
+___fs2ulong:
+	mov	r7, #158
+	.globl	fs2ulong_begin
+fs2ulong_begin:
+	lcall	fsgetarg
+	jnb	sign_a, fs2ulong_int
+	ljmp	fs_return_zero
+
+fs2ulong_int:
+	clr	c
+	mov	a, r7
+	subb	a, exp_a
+	jnc	fs2ulong_int_ok
+	// if we get here, x >= 2^32
+	mov	a, #0xFF
+	mov	b, a
+	mov	dph, a
+	mov	dpl, a
+	ret
+
+fs2ulong_int_ok:
+	mov	r1, #0
+	lcall	fs_rshift_a
+
+fs2ulong_done:
+	mov	dpl, r1
+	mov	dph, r2
+	mov	b, r3
+	mov	a, r4
+	ret
+	__endasm;
+}
+
+#else
+
+/*
+** libgcc support for software floating point.
+** Copyright (C) 1991 by Pipeline Associates, Inc.  All rights reserved.
+** Permission is granted to do *anything* you want with this file,
+** commercial or otherwise, provided this message remains intact.  So there!
+** I would appreciate receiving any updates/patches/changes that anyone
+** makes, and am willing to be the repository for said changes (am I
+** making a big mistake?).
+**
+** Pat Wood
+** Pipeline Associates, Inc.
+** pipeline!phw@motown.com or
+** sun!pipeline!phw or
+** uunet!motown!pipeline!phw
+*/
+
+/* (c)2000/2001: hacked a little by johan.knol@iduna.nl for sdcc */
+
+
+union float_long
+{
+  float f;
+  long l;
+};
+
+/* convert float to unsigned long */
+unsigned long 
+__fs2ulong (float a1)
+{
+  volatile union float_long fl1;
+  volatile int exp;
+  volatile long l;
+  
+  fl1.f = a1;
+  
+  if (!fl1.l || SIGN(fl1.l))
+    return (0);
+
+  exp = EXP (fl1.l) - EXCESS - 24;
+  l = MANT (fl1.l);
+  
+  l >>= -exp;
+
+  return l;
+}
+
+#endif