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Diffstat (limited to 'gcc-4.2.1/gcc/ada/s-fatgen.ads')
| -rw-r--r-- | gcc-4.2.1/gcc/ada/s-fatgen.ads | 131 |
1 files changed, 0 insertions, 131 deletions
diff --git a/gcc-4.2.1/gcc/ada/s-fatgen.ads b/gcc-4.2.1/gcc/ada/s-fatgen.ads deleted file mode 100644 index 83b6f0644..000000000 --- a/gcc-4.2.1/gcc/ada/s-fatgen.ads +++ /dev/null @@ -1,131 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNAT COMPILER COMPONENTS -- --- -- --- S Y S T E M . F A T _ G E N -- --- -- --- S p e c -- --- -- --- 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. -- --- -- ------------------------------------------------------------------------------- - --- This generic package provides a target independent implementation of the --- floating-point attributes that denote functions. The implementations here --- are portable, but very slow. The runtime contains a set of instantiations --- of this package for all predefined floating-point types, and these should --- be replaced by efficient assembly language code where possible. - -generic - type T is digits <>; - -package System.Fat_Gen is - pragma Pure; - - subtype UI is Integer; - -- The runtime representation of universal integer for the purposes of - -- this package is integer. The expander generates conversions for the - -- actual type used. For functions returning universal integer, there - -- is no problem, since the result always is in range of integer. For - -- input arguments, the expander has to do some special casing to deal - -- with the (very annoying!) cases of out of range values. If we used - -- Long_Long_Integer to represent universal, then there would be no - -- problem, but the resulting inefficiency would be annoying. - - function Adjacent (X, Towards : T) return T; - - function Ceiling (X : T) return T; - - function Compose (Fraction : T; Exponent : UI) return T; - - function Copy_Sign (Value, Sign : T) return T; - - function Exponent (X : T) return UI; - - function Floor (X : T) return T; - - function Fraction (X : T) return T; - - function Leading_Part (X : T; Radix_Digits : UI) return T; - - function Machine (X : T) return T; - - function Machine_Rounding (X : T) return T; - - function Model (X : T) return T; - - function Pred (X : T) return T; - - function Remainder (X, Y : T) return T; - - function Rounding (X : T) return T; - - function Scaling (X : T; Adjustment : UI) return T; - - function Succ (X : T) return T; - - function Truncation (X : T) return T; - - function Unbiased_Rounding (X : T) return T; - - function Valid (X : access T) return Boolean; - -- This function checks if the object of type T referenced by X - -- is valid, and returns True/False accordingly. The parameter is - -- passed by reference (access) here, as the object of type T may - -- be an abnormal value that cannot be passed in a floating-point - -- register, and the whole point of 'Valid is to prevent exceptions. - -- Note that the object of type T must have the natural alignment - -- for type T. See Unaligned_Valid for further discussion. - -- - -- Note: this routine does not work for Vax_Float ??? - - function Unaligned_Valid (A : System.Address) return Boolean; - -- This version of Valid is used if the floating-point value to - -- be checked is not known to be aligned (for example it appears - -- in a packed record). In this case, we cannot call Valid since - -- Valid assumes proper full alignment. Instead Unaligned_Valid - -- performs the same processing for a possibly unaligned float, - -- by first doing a copy and then calling Valid. One might think - -- that the front end could simply do a copy to an aligned temp, - -- but remember that we may have an abnormal value that cannot - -- be copied into a floating-point register, so things are a bit - -- trickier than one might expect. - -- - -- Note: Unaligned_Valid is never called for a target which does - -- not require strict alignment (e.g. the ia32/x86), since on a - -- target not requiring strict alignment, it is fine to pass a - -- non-aligned value to the standard Valid routine. - -- - -- Note: this routine does not work for Vax_Float ??? - -private - pragma Inline (Machine); - pragma Inline (Model); - - -- Note: previously the validity checking subprograms (Unaligned_Valid and - -- Valid) were also inlined, but this was changed since there were some - -- problems with this inlining in optimized mode, and in any case it seems - -- better to avoid this inlining (space and robustness considerations). - -end System.Fat_Gen; |