diff options
Diffstat (limited to 'gcc/ada/s-pack36.adb')
| -rw-r--r-- | gcc/ada/s-pack36.adb | 195 |
1 files changed, 141 insertions, 54 deletions
diff --git a/gcc/ada/s-pack36.adb b/gcc/ada/s-pack36.adb index bfd3e55ef30..9303a508487 100644 --- a/gcc/ada/s-pack36.adb +++ b/gcc/ada/s-pack36.adb @@ -6,7 +6,7 @@ -- -- -- B o d y -- -- -- --- Copyright (C) 1992-2009, Free Software Foundation, Inc. -- +-- Copyright (C) 1992-2014, 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- -- @@ -31,10 +31,13 @@ with System.Storage_Elements; with System.Unsigned_Types; -with Ada.Unchecked_Conversion; package body System.Pack_36 is + subtype Bit_Order is System.Bit_Order; + Reverse_Bit_Order : constant Bit_Order := + Bit_Order'Val (1 - Bit_Order'Pos (System.Default_Bit_Order)); + subtype Ofs is System.Storage_Elements.Storage_Offset; subtype Uns is System.Unsigned_Types.Unsigned; subtype N07 is System.Unsigned_Types.Unsigned range 0 .. 7; @@ -68,8 +71,10 @@ package body System.Pack_36 is type Cluster_Ref is access Cluster; - function To_Ref is new - Ada.Unchecked_Conversion (System.Address, Cluster_Ref); + type Rev_Cluster is new Cluster + with Bit_Order => Reverse_Bit_Order, + Scalar_Storage_Order => Reverse_Bit_Order; + type Rev_Cluster_Ref is access Rev_Cluster; -- The following declarations are for the case where the address -- passed to GetU_36 or SetU_36 is not guaranteed to be aligned. @@ -81,83 +86,165 @@ package body System.Pack_36 is type ClusterU_Ref is access ClusterU; - function To_Ref is new - Ada.Unchecked_Conversion (System.Address, ClusterU_Ref); + type Rev_ClusterU is new ClusterU + with Bit_Order => Reverse_Bit_Order, + Scalar_Storage_Order => Reverse_Bit_Order; + type Rev_ClusterU_Ref is access Rev_ClusterU; ------------ -- Get_36 -- ------------ - function Get_36 (Arr : System.Address; N : Natural) return Bits_36 is - C : constant Cluster_Ref := To_Ref (Arr + Bits * Ofs (Uns (N) / 8)); + function Get_36 + (Arr : System.Address; + N : Natural; + Rev_SSO : Boolean) return Bits_36 + is + A : constant System.Address := Arr + Bits * Ofs (Uns (N) / 8); + C : Cluster_Ref with Address => A'Address, Import; + RC : Rev_Cluster_Ref with Address => A'Address, Import; begin - case N07 (Uns (N) mod 8) is - when 0 => return C.E0; - when 1 => return C.E1; - when 2 => return C.E2; - when 3 => return C.E3; - when 4 => return C.E4; - when 5 => return C.E5; - when 6 => return C.E6; - when 7 => return C.E7; - end case; + if Rev_SSO then + case N07 (Uns (N) mod 8) is + when 0 => return RC.E0; + when 1 => return RC.E1; + when 2 => return RC.E2; + when 3 => return RC.E3; + when 4 => return RC.E4; + when 5 => return RC.E5; + when 6 => return RC.E6; + when 7 => return RC.E7; + end case; + + else + case N07 (Uns (N) mod 8) is + when 0 => return C.E0; + when 1 => return C.E1; + when 2 => return C.E2; + when 3 => return C.E3; + when 4 => return C.E4; + when 5 => return C.E5; + when 6 => return C.E6; + when 7 => return C.E7; + end case; + end if; end Get_36; ------------- -- GetU_36 -- ------------- - function GetU_36 (Arr : System.Address; N : Natural) return Bits_36 is - C : constant ClusterU_Ref := To_Ref (Arr + Bits * Ofs (Uns (N) / 8)); + function GetU_36 + (Arr : System.Address; + N : Natural; + Rev_SSO : Boolean) return Bits_36 + is + A : constant System.Address := Arr + Bits * Ofs (Uns (N) / 8); + C : ClusterU_Ref with Address => A'Address, Import; + RC : Rev_ClusterU_Ref with Address => A'Address, Import; begin - case N07 (Uns (N) mod 8) is - when 0 => return C.E0; - when 1 => return C.E1; - when 2 => return C.E2; - when 3 => return C.E3; - when 4 => return C.E4; - when 5 => return C.E5; - when 6 => return C.E6; - when 7 => return C.E7; - end case; + if Rev_SSO then + case N07 (Uns (N) mod 8) is + when 0 => return RC.E0; + when 1 => return RC.E1; + when 2 => return RC.E2; + when 3 => return RC.E3; + when 4 => return RC.E4; + when 5 => return RC.E5; + when 6 => return RC.E6; + when 7 => return RC.E7; + end case; + + else + case N07 (Uns (N) mod 8) is + when 0 => return C.E0; + when 1 => return C.E1; + when 2 => return C.E2; + when 3 => return C.E3; + when 4 => return C.E4; + when 5 => return C.E5; + when 6 => return C.E6; + when 7 => return C.E7; + end case; + end if; end GetU_36; ------------ -- Set_36 -- ------------ - procedure Set_36 (Arr : System.Address; N : Natural; E : Bits_36) is - C : constant Cluster_Ref := To_Ref (Arr + Bits * Ofs (Uns (N) / 8)); + procedure Set_36 + (Arr : System.Address; + N : Natural; + E : Bits_36; + Rev_SSO : Boolean) + is + A : constant System.Address := Arr + Bits * Ofs (Uns (N) / 8); + C : Cluster_Ref with Address => A'Address, Import; + RC : Rev_Cluster_Ref with Address => A'Address, Import; begin - case N07 (Uns (N) mod 8) is - when 0 => C.E0 := E; - when 1 => C.E1 := E; - when 2 => C.E2 := E; - when 3 => C.E3 := E; - when 4 => C.E4 := E; - when 5 => C.E5 := E; - when 6 => C.E6 := E; - when 7 => C.E7 := E; - end case; + if Rev_SSO then + case N07 (Uns (N) mod 8) is + when 0 => RC.E0 := E; + when 1 => RC.E1 := E; + when 2 => RC.E2 := E; + when 3 => RC.E3 := E; + when 4 => RC.E4 := E; + when 5 => RC.E5 := E; + when 6 => RC.E6 := E; + when 7 => RC.E7 := E; + end case; + else + case N07 (Uns (N) mod 8) is + when 0 => C.E0 := E; + when 1 => C.E1 := E; + when 2 => C.E2 := E; + when 3 => C.E3 := E; + when 4 => C.E4 := E; + when 5 => C.E5 := E; + when 6 => C.E6 := E; + when 7 => C.E7 := E; + end case; + end if; end Set_36; ------------- -- SetU_36 -- ------------- - procedure SetU_36 (Arr : System.Address; N : Natural; E : Bits_36) is - C : constant ClusterU_Ref := To_Ref (Arr + Bits * Ofs (Uns (N) / 8)); + procedure SetU_36 + (Arr : System.Address; + N : Natural; + E : Bits_36; + Rev_SSO : Boolean) + is + A : constant System.Address := Arr + Bits * Ofs (Uns (N) / 8); + C : ClusterU_Ref with Address => A'Address, Import; + RC : Rev_ClusterU_Ref with Address => A'Address, Import; begin - case N07 (Uns (N) mod 8) is - when 0 => C.E0 := E; - when 1 => C.E1 := E; - when 2 => C.E2 := E; - when 3 => C.E3 := E; - when 4 => C.E4 := E; - when 5 => C.E5 := E; - when 6 => C.E6 := E; - when 7 => C.E7 := E; - end case; + if Rev_SSO then + case N07 (Uns (N) mod 8) is + when 0 => RC.E0 := E; + when 1 => RC.E1 := E; + when 2 => RC.E2 := E; + when 3 => RC.E3 := E; + when 4 => RC.E4 := E; + when 5 => RC.E5 := E; + when 6 => RC.E6 := E; + when 7 => RC.E7 := E; + end case; + else + case N07 (Uns (N) mod 8) is + when 0 => C.E0 := E; + when 1 => C.E1 := E; + when 2 => C.E2 := E; + when 3 => C.E3 := E; + when 4 => C.E4 := E; + when 5 => C.E5 := E; + when 6 => C.E6 := E; + when 7 => C.E7 := E; + end case; + end if; end SetU_36; end System.Pack_36; |