sdcc-3.9.0 fork implementing GNU assembler syntax

This fork aims to provide better support for stm8-binutils

1 files changed, 128 insertions, 0 deletions

diff --git a/device/lib/pic16/libsdcc/float/fsadd.c b/device/lib/pic16/libsdcc/float/fsadd.c
new file mode 100644
index 0000000..b7f01e1
--- /dev/null
+++ b/device/lib/pic16/libsdcc/float/fsadd.c
@@ -0,0 +1,128 @@
+/*-------------------------------------------------------------------------
+   fsadd.c.c
+
+   Copyright (C) 1991, Pipeline Associates, Inc
+
+   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.
+-------------------------------------------------------------------------*/
+/*
+** 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
+*/
+
+#include <float.h>
+
+union float_long
+  {
+    float f;
+    unsigned long l;
+  };
+
+/* add two floats */
+float
+__fsadd (float a1, float a2) _FS_REENTRANT
+{
+  volatile union float_long fl1, fl2;
+  long mant1, mant2;
+  int exp1, exp2;
+  unsigned long sign = 0;
+
+  fl1.f = a1;
+  fl2.f = a2;
+
+  /* check for zero args */
+  if (!fl1.l)
+    return fl2.f;
+  if (!fl2.l)
+    return fl1.f;
+
+  exp1 = EXP (fl1.l);
+  exp2 = EXP (fl2.l);
+
+  if (exp1 > exp2 + 25)
+    return fl1.f;
+  if (exp2 > exp1 + 25)
+    return fl2.f;
+
+  mant1 = MANT (fl1.l);
+  mant2 = MANT (fl2.l);
+
+  if (SIGN (fl1.l))
+    mant1 = -mant1;
+  if (SIGN (fl2.l))
+    mant2 = -mant2;
+
+  if (exp1 > exp2)
+    {
+      mant2 >>= exp1 - exp2;
+    }
+  else
+    {
+      mant1 >>= exp2 - exp1;
+      exp1 = exp2;
+    }
+  mant1 += mant2;
+
+  if (mant1 < 0)
+    {
+      mant1 = -mant1;
+      sign = SIGNBIT;
+    }
+  else if (!mant1)
+    return (0);
+
+  /* normalize */
+  while (mant1 < HIDDEN)
+    {
+      mant1 <<= 1;
+      --exp1;
+    }
+
+  /* round off */
+  while (mant1 & 0xff000000)
+    {
+      if (mant1&1)
+        mant1 += 2;
+      mant1 >>= 1 ;
+      exp1++;
+    }
+
+  /* turn off hidden bit */
+  mant1 &= ~HIDDEN;
+
+  /* pack up and go home */
+  fl1.l = PACK (sign, (unsigned long) exp1, mant1);
+
+  return fl1.f;
+}