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Diffstat (limited to 'gcc-4.2.1/gcc/ada/s-exnllf.adb')
| -rw-r--r-- | gcc-4.2.1/gcc/ada/s-exnllf.adb | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/gcc-4.2.1/gcc/ada/s-exnllf.adb b/gcc-4.2.1/gcc/ada/s-exnllf.adb deleted file mode 100644 index ae282c811..000000000 --- a/gcc-4.2.1/gcc/ada/s-exnllf.adb +++ /dev/null @@ -1,99 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNAT RUN-TIME COMPONENTS -- --- -- --- S Y S T E M . E X N _ L L F -- --- -- --- B o d y -- --- -- --- Copyright (C) 1992-2005 Free Software Foundation, Inc. -- --- -- --- GNAT is free software; you can redistribute it and/or modify it under -- --- terms of the GNU General Public License as published by the Free Soft- -- --- ware Foundation; either version 2, or (at your option) any later ver- -- --- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- --- OUT 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 distributed with GNAT; see 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 other files instantiate generics from this -- --- unit, or you link this unit with other files to produce an executable, -- --- this unit 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 Public License. -- --- -- --- GNAT was originally developed by the GNAT team at New York University. -- --- Extensive contributions were provided by Ada Core Technologies Inc. -- --- -- ------------------------------------------------------------------------------- - -package body System.Exn_LLF is - - ------------------------- - -- Exn_Long_Long_Float -- - ------------------------- - - function Exn_Long_Long_Float - (Left : Long_Long_Float; - Right : Integer) - return Long_Long_Float - is - Result : Long_Long_Float := 1.0; - Factor : Long_Long_Float := Left; - Exp : Integer := Right; - - begin - -- We use the standard logarithmic approach, Exp gets shifted right - -- testing successive low order bits and Factor is the value of the - -- base raised to the next power of 2. If the low order bit or Exp is - -- set, multiply the result by this factor. For negative exponents, - -- invert result upon return. - - if Exp >= 0 then - loop - if Exp rem 2 /= 0 then - Result := Result * Factor; - end if; - - Exp := Exp / 2; - exit when Exp = 0; - Factor := Factor * Factor; - end loop; - - return Result; - - -- Here we have a negative exponent, and we compute the result as: - - -- 1.0 / (Left ** (-Right)) - - -- Note that the case of Left being zero is not special, it will - -- simply result in a division by zero at the end, yielding a - -- correctly signed infinity, or possibly generating an overflow. - - -- Note on overflow: The coding of this routine assumes that the - -- target generates infinities with standard IEEE semantics. If this - -- is not the case, then the code below may raise Constraint_Error. - -- This follows the implementation permission given in RM 4.5.6(12). - - else - begin - loop - if Exp rem 2 /= 0 then - Result := Result * Factor; - end if; - - Exp := Exp / 2; - exit when Exp = 0; - Factor := Factor * Factor; - end loop; - - return 1.0 / Result; - end; - end if; - end Exn_Long_Long_Float; - -end System.Exn_LLF; |