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-- Mcode back-end for ortho - X86 common definitions.
-- Copyright (C) 2006 Tristan Gingold
--
-- This program 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 of the License, or
-- (at your option) any later version.
--
-- This program 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 program. If not, see <gnu.org/licenses>.
package body Ortho_Code.X86 is
function Inverse_Cc (R : O_Reg) return O_Reg is
begin
case R is
when R_Ult =>
return R_Uge;
when R_Uge =>
return R_Ult;
when R_Eq =>
return R_Ne;
when R_Ne =>
return R_Eq;
when R_Ule =>
return R_Ugt;
when R_Ugt =>
return R_Ule;
when R_Slt =>
return R_Sge;
when R_Sge =>
return R_Slt;
when R_Sle =>
return R_Sgt;
when R_Sgt =>
return R_Sle;
when others =>
raise Program_Error;
end case;
end Inverse_Cc;
function Get_Pair_High (Reg : Regs_Pair) return Regs_R32 is
begin
case Reg is
when R_Edx_Eax =>
return R_Dx;
when R_Ebx_Ecx =>
return R_Bx;
when R_Esi_Edi =>
return R_Si;
end case;
end Get_Pair_High;
function Get_Pair_Low (Reg : Regs_Pair) return Regs_R32 is
begin
case Reg is
when R_Edx_Eax =>
return R_Ax;
when R_Ebx_Ecx =>
return R_Cx;
when R_Esi_Edi =>
return R_Di;
end case;
end Get_Pair_Low;
end Ortho_Code.X86;
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