diff options
Diffstat (limited to 'gcc/ada/s-scaval.ads')
| -rw-r--r-- | gcc/ada/s-scaval.ads | 61 |
1 files changed, 35 insertions, 26 deletions
diff --git a/gcc/ada/s-scaval.ads b/gcc/ada/s-scaval.ads index 07324b6724c..9db3c9830d8 100644 --- a/gcc/ada/s-scaval.ads +++ b/gcc/ada/s-scaval.ads @@ -3,9 +3,10 @@ -- GNAT RUNTIME COMPONENTS -- -- -- -- S Y S T E M . S C A L A R _ V A L U E S -- +-- -- -- S p e c -- -- -- --- Copyright (C) 2001 Free Software Foundation, Inc. -- +-- Copyright (C) 2001-2003 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- -- @@ -37,37 +38,45 @@ -- by the use of pragma Import. package System.Scalar_Values is -pragma Pure (Scalar_Values); + + -- Note: logically this package should be Pure since it can be accessed + -- from pure units, but the IS_xxx variables below get set at run time, + -- so they have to be library level variables. In fact we only ever + -- access this from generated code, and the compiler knows that it is + -- OK to access this unit from generated code. type Byte1 is mod 2 ** 8; type Byte2 is mod 2 ** 16; type Byte4 is mod 2 ** 32; type Byte8 is mod 2 ** 64; - IS_Is1 : constant Byte1; -- Initialize 1 byte signed value - IS_Is2 : constant Byte2; -- Initialize 2 byte signed value - IS_Is4 : constant Byte4; -- Initialize 4 byte signed value - IS_Is8 : constant Byte8; -- Initialize 8 byte signed value - IS_Iu1 : constant Byte1; -- Initialize 1 byte unsigned value - IS_Iu2 : constant Byte2; -- Initialize 2 byte unsigned value - IS_Iu4 : constant Byte4; -- Initialize 4 byte unsigned value - IS_Iu8 : constant Byte8; -- Initialize 8 byte unsigned value - IS_Isf : constant Short_Float; -- Initialize short float value - IS_Ifl : constant Float; -- Initialize float value - IS_Ilf : constant Long_Float; -- Initialize long float value - IS_Ill : constant Long_Long_Float; -- Initialize long long float value + -- The explicit initializations here are not really required, since these + -- variables are always set by System.Scalar_Values.Initialize. + + IS_Is1 : Byte1 := 0; -- Initialize 1 byte signed + IS_Is2 : Byte2 := 0; -- Initialize 2 byte signed + IS_Is4 : Byte4 := 0; -- Initialize 4 byte signed + IS_Is8 : Byte8 := 0; -- Initialize 8 byte signed + IS_Iu1 : Byte1 := 0; -- Initialize 1 byte unsigned + IS_Iu2 : Byte2 := 0; -- Initialize 2 byte unsigned + IS_Iu4 : Byte4 := 0; -- Initialize 4 byte unsigned + IS_Iu8 : Byte8 := 0; -- Initialize 8 byte unsigned + + -- The float definitions are aliased, because we use overlays to set them + + IS_Isf : aliased Short_Float := 0.0; -- Initialize short float + IS_Ifl : aliased Float := 0.0; -- Initialize float + IS_Ilf : aliased Long_Float := 0.0; -- Initialize long float + IS_Ill : aliased Long_Long_Float := 0.0; -- Initialize long long float - pragma Import (Ada, IS_Is1, "__gnat_Is1"); - pragma Import (Ada, IS_Is2, "__gnat_Is2"); - pragma Import (Ada, IS_Is4, "__gnat_Is4"); - pragma Import (Ada, IS_Is8, "__gnat_Is8"); - pragma Import (Ada, IS_Iu1, "__gnat_Iu1"); - pragma Import (Ada, IS_Iu2, "__gnat_Iu2"); - pragma Import (Ada, IS_Iu4, "__gnat_Iu4"); - pragma Import (Ada, IS_Iu8, "__gnat_Iu8"); - pragma Import (Ada, IS_Isf, "__gnat_Isf"); - pragma Import (Ada, IS_Ifl, "__gnat_Ifl"); - pragma Import (Ada, IS_Ilf, "__gnat_Ilf"); - pragma Import (Ada, IS_Ill, "__gnat_Ill"); + procedure Initialize (Mode1 : Character; Mode2 : Character); + -- This procedure is called from the binder when Initialize_Scalars mode + -- is active. The arguments are the two characters from the -S switch, + -- with letters forced upper case. So for example if -S5a is given, then + -- Mode1 will be '5' and Mode2 will be 'A'. If the parameters are EV, + -- then this routine reads the environment variable GNAT_INIT_SCALARS. + -- The possible settings are the same as those for the -S switch (except + -- for EV), i.e. IN/LO/HO/xx, xx = 2 hex digits. If no -S switch is given + -- then the default of IN (invalid values) is passed on the call. end System.Scalar_Values; |