sdcc-3.9.0 fork implementing GNU assembler syntax

This fork aims to provide better support for stm8-binutils

1 files changed, 107 insertions, 0 deletions

diff --git a/device/lib/pic16/libsdcc/float/fsmul.c b/device/lib/pic16/libsdcc/float/fsmul.c
new file mode 100644
index 0000000..2a328c1
--- /dev/null
+++ b/device/lib/pic16/libsdcc/float/fsmul.c
@@ -0,0 +1,107 @@
+/*-------------------------------------------------------------------------
+   fsmul.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
+*/
+
+/* (c)2000/2001: hacked a little by johan.knol@iduna.nl for sdcc */
+
+#include <float.h>
+
+union float_long
+  {
+    float f;
+    unsigned long l;
+  };
+
+/* multiply two floats */
+float
+__fsmul (float a1, float a2) _FS_REENTRANT
+{
+  volatile union float_long fl1, fl2;
+  unsigned long result;
+  int exp;
+  char sign;
+  
+  fl1.f = a1;
+  fl2.f = a2;
+
+  if (!fl1.l || !fl2.l)
+    return 0;
+
+  /* compute sign and exponent */
+  sign = SIGN (fl1.l) ^ SIGN (fl2.l);
+  exp = EXP (fl1.l) - EXCESS;
+  exp += EXP (fl2.l);
+
+  fl1.l = MANT (fl1.l);
+  fl2.l = MANT (fl2.l);
+
+  /* the multiply is done as one 16x16 multiply and two 16x8 multiples */
+  result = (fl1.l >> 8) * (fl2.l >> 8);
+  result += ((fl1.l & (unsigned long) 0xFF) * (fl2.l >> 8)) >> 8;
+  result += ((fl2.l & (unsigned long) 0xFF) * (fl1.l >> 8)) >> 8;
+
+  /* round, phase 1 */
+  result += 0x40;
+
+  if (result & SIGNBIT)
+    {
+      /* round, phase 2 */
+      result += 0x40;
+      result >>= 8;
+    }
+  else
+    {
+      result >>= 7;
+      --exp;
+    }
+
+  result &= ~HIDDEN;
+
+  /* pack up and go home */
+  if (exp >= 0x100)
+    fl1.l = (sign ? SIGNBIT : 0) | 0x7F800000;
+  else if (exp < 0)
+    fl1.l = 0;
+  else
+    fl1.l = PACK (sign ? SIGNBIT : 0 , exp, result);
+  return fl1.f;
+}