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|
------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S Y S T E M . V A X _ F L O A T _ O P E R A T I O N S --
-- --
-- B o d y --
-- --
-- --
-- Copyright (C) 1997-2000 Free Software Foundation, Inc. --
-- (Version for Alpha OpenVMS) --
-- --
-- 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, 59 Temple Place - Suite 330, Boston, --
-- MA 02111-1307, 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. --
-- --
------------------------------------------------------------------------------
with System.IO; use System.IO;
with System.Machine_Code; use System.Machine_Code;
package body System.Vax_Float_Operations is
-- Ensure this gets compiled with -O to avoid extra (and possibly
-- improper) memory stores.
pragma Optimize (Time);
-- Declare the functions that do the conversions between floating-point
-- formats. Call the operands IEEE float so they get passed in
-- FP registers.
function Cvt_G_T (X : T) return T;
function Cvt_T_G (X : T) return T;
function Cvt_T_F (X : T) return S;
pragma Import (C, Cvt_G_T, "OTS$CVT_FLOAT_G_T");
pragma Import (C, Cvt_T_G, "OTS$CVT_FLOAT_T_G");
pragma Import (C, Cvt_T_F, "OTS$CVT_FLOAT_T_F");
-- In each of the conversion routines that are done with OTS calls,
-- we define variables of the corresponding IEEE type so that they are
-- passed and kept in the proper register class.
------------
-- D_To_G --
------------
function D_To_G (X : D) return G is
A, B : T;
C : G;
begin
Asm ("ldg %0,%1", T'Asm_Output ("=f", A), D'Asm_Input ("m", X));
Asm ("cvtdg %1,%0", T'Asm_Output ("=f", B), T'Asm_Input ("f", A));
Asm ("stg %1,%0", G'Asm_Output ("=m", C), T'Asm_Input ("f", B));
return C;
end D_To_G;
------------
-- F_To_G --
------------
function F_To_G (X : F) return G is
A : T;
B : G;
begin
Asm ("ldf %0,%1", T'Asm_Output ("=f", A), F'Asm_Input ("m", X));
Asm ("stg %1,%0", G'Asm_Output ("=m", B), T'Asm_Input ("f", A));
return B;
end F_To_G;
------------
-- F_To_S --
------------
function F_To_S (X : F) return S is
A : T;
B : S;
begin
-- Because converting to a wider FP format is a no-op, we say
-- A is 64-bit even though we are loading 32 bits into it.
Asm ("ldf %0,%1", T'Asm_Output ("=f", A), F'Asm_Input ("m", X));
B := S (Cvt_G_T (A));
return B;
end F_To_S;
------------
-- G_To_D --
------------
function G_To_D (X : G) return D is
A, B : T;
C : D;
begin
Asm ("ldg %0,%1", T'Asm_Output ("=f", A), G'Asm_Input ("m", X));
Asm ("cvtgd %1,%0", T'Asm_Output ("=f", B), T'Asm_Input ("f", A));
Asm ("stg %1,%0", D'Asm_Output ("=m", C), T'Asm_Input ("f", B));
return C;
end G_To_D;
------------
-- G_To_F --
------------
function G_To_F (X : G) return F is
A : T;
B : S;
C : F;
begin
Asm ("ldg %0,%1", T'Asm_Output ("=f", A), G'Asm_Input ("m", X));
Asm ("cvtgf %1,%0", S'Asm_Output ("=f", B), T'Asm_Input ("f", A));
Asm ("stf %1,%0", F'Asm_Output ("=m", C), S'Asm_Input ("f", B));
return C;
end G_To_F;
------------
-- G_To_Q --
------------
function G_To_Q (X : G) return Q is
A : T;
B : Q;
begin
Asm ("ldg %0,%1", T'Asm_Output ("=f", A), G'Asm_Input ("m", X));
Asm ("cvtgq %1,%0", Q'Asm_Output ("=f", B), T'Asm_Input ("f", A));
return B;
end G_To_Q;
------------
-- G_To_T --
------------
function G_To_T (X : G) return T is
A, B : T;
begin
Asm ("ldg %0,%1", T'Asm_Output ("=f", A), G'Asm_Input ("m", X));
B := Cvt_G_T (A);
return B;
end G_To_T;
------------
-- F_To_Q --
------------
function F_To_Q (X : F) return Q is
begin
return G_To_Q (F_To_G (X));
end F_To_Q;
------------
-- Q_To_F --
------------
function Q_To_F (X : Q) return F is
A : S;
B : F;
begin
Asm ("cvtqf %1,%0", S'Asm_Output ("=f", A), Q'Asm_Input ("f", X));
Asm ("stf %1,%0", F'Asm_Output ("=m", B), S'Asm_Input ("f", A));
return B;
end Q_To_F;
------------
-- Q_To_G --
------------
function Q_To_G (X : Q) return G is
A : T;
B : G;
begin
Asm ("cvtqg %1,%0", T'Asm_Output ("=f", A), Q'Asm_Input ("f", X));
Asm ("stg %1,%0", G'Asm_Output ("=m", B), T'Asm_Input ("f", A));
return B;
end Q_To_G;
------------
-- S_To_F --
------------
function S_To_F (X : S) return F is
A : S;
B : F;
begin
A := Cvt_T_F (T (X));
Asm ("stf %1,%0", F'Asm_Output ("=m", B), S'Asm_Input ("f", A));
return B;
end S_To_F;
------------
-- T_To_D --
------------
function T_To_D (X : T) return D is
begin
return G_To_D (T_To_G (X));
end T_To_D;
------------
-- T_To_G --
------------
function T_To_G (X : T) return G is
A : T;
B : G;
begin
A := Cvt_T_G (X);
Asm ("stg %1,%0", G'Asm_Output ("=m", B), T'Asm_Input ("f", A));
return B;
end T_To_G;
-----------
-- Abs_F --
-----------
function Abs_F (X : F) return F is
A, B : S;
C : F;
begin
Asm ("ldf %0,%1", S'Asm_Output ("=f", A), F'Asm_Input ("m", X));
Asm ("cpys $f31,%1,%0", S'Asm_Output ("=f", B), S'Asm_Input ("f", A));
Asm ("stf %1,%0", F'Asm_Output ("=m", C), S'Asm_Input ("f", B));
return C;
end Abs_F;
-----------
-- Abs_G --
-----------
function Abs_G (X : G) return G is
A, B : T;
C : G;
begin
Asm ("ldg %0,%1", T'Asm_Output ("=f", A), G'Asm_Input ("m", X));
Asm ("cpys $f31,%1,%0", T'Asm_Output ("=f", B), T'Asm_Input ("f", A));
Asm ("stg %1,%0", G'Asm_Output ("=m", C), T'Asm_Input ("f", B));
return C;
end Abs_G;
-----------
-- Add_F --
-----------
function Add_F (X, Y : F) return F is
X1, Y1, R : S;
R1 : F;
begin
Asm ("ldf %0,%1", S'Asm_Output ("=f", X1), F'Asm_Input ("m", X));
Asm ("ldf %0,%1", S'Asm_Output ("=f", Y1), F'Asm_Input ("m", Y));
Asm ("addf %1,%2,%0", S'Asm_Output ("=f", R),
(S'Asm_Input ("f", X1), S'Asm_Input ("f", Y1)));
Asm ("stf %1,%0", F'Asm_Output ("=m", R1), S'Asm_Input ("f", R));
return R1;
end Add_F;
-----------
-- Add_G --
-----------
function Add_G (X, Y : G) return G is
X1, Y1, R : T;
R1 : G;
begin
Asm ("ldg %0,%1", T'Asm_Output ("=f", X1), G'Asm_Input ("m", X));
Asm ("ldg %0,%1", T'Asm_Output ("=f", Y1), G'Asm_Input ("m", Y));
Asm ("addg %1,%2,%0", T'Asm_Output ("=f", R),
(T'Asm_Input ("f", X1), T'Asm_Input ("f", Y1)));
Asm ("stg %1,%0", G'Asm_Output ("=m", R1), T'Asm_Input ("f", R));
return R1;
end Add_G;
--------------------
-- Debug_Output_D --
--------------------
procedure Debug_Output_D (Arg : D) is
begin
Put (D'Image (Arg));
end Debug_Output_D;
--------------------
-- Debug_Output_F --
--------------------
procedure Debug_Output_F (Arg : F) is
begin
Put (F'Image (Arg));
end Debug_Output_F;
--------------------
-- Debug_Output_G --
--------------------
procedure Debug_Output_G (Arg : G) is
begin
Put (G'Image (Arg));
end Debug_Output_G;
--------------------
-- Debug_String_D --
--------------------
Debug_String_Buffer : String (1 .. 32);
-- Buffer used by all Debug_String_x routines for returning result
function Debug_String_D (Arg : D) return System.Address is
Image_String : constant String := D'Image (Arg) & ASCII.NUL;
Image_Size : constant Integer := Image_String'Length;
begin
Debug_String_Buffer (1 .. Image_Size) := Image_String;
return Debug_String_Buffer (1)'Address;
end Debug_String_D;
--------------------
-- Debug_String_F --
--------------------
function Debug_String_F (Arg : F) return System.Address is
Image_String : constant String := F'Image (Arg) & ASCII.NUL;
Image_Size : constant Integer := Image_String'Length;
begin
Debug_String_Buffer (1 .. Image_Size) := Image_String;
return Debug_String_Buffer (1)'Address;
end Debug_String_F;
--------------------
-- Debug_String_G --
--------------------
function Debug_String_G (Arg : G) return System.Address is
Image_String : constant String := G'Image (Arg) & ASCII.NUL;
Image_Size : constant Integer := Image_String'Length;
begin
Debug_String_Buffer (1 .. Image_Size) := Image_String;
return Debug_String_Buffer (1)'Address;
end Debug_String_G;
-----------
-- Div_F --
-----------
function Div_F (X, Y : F) return F is
X1, Y1, R : S;
R1 : F;
begin
Asm ("ldf %0,%1", S'Asm_Output ("=f", X1), F'Asm_Input ("m", X));
Asm ("ldf %0,%1", S'Asm_Output ("=f", Y1), F'Asm_Input ("m", Y));
Asm ("divf %1,%2,%0", S'Asm_Output ("=f", R),
(S'Asm_Input ("f", X1), S'Asm_Input ("f", Y1)));
Asm ("stf %1,%0", F'Asm_Output ("=m", R1), S'Asm_Input ("f", R));
return R1;
end Div_F;
-----------
-- Div_G --
-----------
function Div_G (X, Y : G) return G is
X1, Y1, R : T;
R1 : G;
begin
Asm ("ldg %0,%1", T'Asm_Output ("=f", X1), G'Asm_Input ("m", X));
Asm ("ldg %0,%1", T'Asm_Output ("=f", Y1), G'Asm_Input ("m", Y));
Asm ("divg %1,%2,%0", T'Asm_Output ("=f", R),
(T'Asm_Input ("f", X1), T'Asm_Input ("f", Y1)));
Asm ("stg %1,%0", G'Asm_Output ("=m", R1), T'Asm_Input ("f", R));
return R1;
end Div_G;
----------
-- Eq_F --
----------
function Eq_F (X, Y : F) return Boolean is
X1, Y1, R : S;
begin
Asm ("ldf %0,%1", S'Asm_Output ("=f", X1), F'Asm_Input ("m", X));
Asm ("ldf %0,%1", S'Asm_Output ("=f", Y1), F'Asm_Input ("m", Y));
Asm ("cmpgeq %1,%2,%0", S'Asm_Output ("=f", R),
(S'Asm_Input ("f", X1), S'Asm_Input ("f", Y1)));
return R /= 0.0;
end Eq_F;
----------
-- Eq_G --
----------
function Eq_G (X, Y : G) return Boolean is
X1, Y1, R : T;
begin
Asm ("ldg %0,%1", T'Asm_Output ("=f", X1), G'Asm_Input ("m", X));
Asm ("ldg %0,%1", T'Asm_Output ("=f", Y1), G'Asm_Input ("m", Y));
Asm ("cmpgeq %1,%2,%0", T'Asm_Output ("=f", R),
(T'Asm_Input ("f", X1), T'Asm_Input ("f", Y1)));
return R /= 0.0;
end Eq_G;
----------
-- Le_F --
----------
function Le_F (X, Y : F) return Boolean is
X1, Y1, R : S;
begin
Asm ("ldf %0,%1", S'Asm_Output ("=f", X1), F'Asm_Input ("m", X));
Asm ("ldf %0,%1", S'Asm_Output ("=f", Y1), F'Asm_Input ("m", Y));
Asm ("cmpgle %1,%2,%0", S'Asm_Output ("=f", R),
(S'Asm_Input ("f", X1), S'Asm_Input ("f", Y1)));
return R /= 0.0;
end Le_F;
----------
-- Le_G --
----------
function Le_G (X, Y : G) return Boolean is
X1, Y1, R : T;
begin
Asm ("ldg %0,%1", T'Asm_Output ("=f", X1), G'Asm_Input ("m", X));
Asm ("ldg %0,%1", T'Asm_Output ("=f", Y1), G'Asm_Input ("m", Y));
Asm ("cmpgle %1,%2,%0", T'Asm_Output ("=f", R),
(T'Asm_Input ("f", X1), T'Asm_Input ("f", Y1)));
return R /= 0.0;
end Le_G;
----------
-- Lt_F --
----------
function Lt_F (X, Y : F) return Boolean is
X1, Y1, R : S;
begin
Asm ("ldf %0,%1", S'Asm_Output ("=f", X1), F'Asm_Input ("m", X));
Asm ("ldf %0,%1", S'Asm_Output ("=f", Y1), F'Asm_Input ("m", Y));
Asm ("cmpglt %1,%2,%0", S'Asm_Output ("=f", R),
(S'Asm_Input ("f", X1), S'Asm_Input ("f", Y1)));
return R /= 0.0;
end Lt_F;
----------
-- Lt_G --
----------
function Lt_G (X, Y : G) return Boolean is
X1, Y1, R : T;
begin
Asm ("ldg %0,%1", T'Asm_Output ("=f", X1), G'Asm_Input ("m", X));
Asm ("ldg %0,%1", T'Asm_Output ("=f", Y1), G'Asm_Input ("m", Y));
Asm ("cmpglt %1,%2,%0", T'Asm_Output ("=f", R),
(T'Asm_Input ("f", X1), T'Asm_Input ("f", Y1)));
return R /= 0.0;
end Lt_G;
-----------
-- Mul_F --
-----------
function Mul_F (X, Y : F) return F is
X1, Y1, R : S;
R1 : F;
begin
Asm ("ldf %0,%1", S'Asm_Output ("=f", X1), F'Asm_Input ("m", X));
Asm ("ldf %0,%1", S'Asm_Output ("=f", Y1), F'Asm_Input ("m", Y));
Asm ("mulf %1,%2,%0", S'Asm_Output ("=f", R),
(S'Asm_Input ("f", X1), S'Asm_Input ("f", Y1)));
Asm ("stf %1,%0", F'Asm_Output ("=m", R1), S'Asm_Input ("f", R));
return R1;
end Mul_F;
-----------
-- Mul_G --
-----------
function Mul_G (X, Y : G) return G is
X1, Y1, R : T;
R1 : G;
begin
Asm ("ldg %0,%1", T'Asm_Output ("=f", X1), G'Asm_Input ("m", X));
Asm ("ldg %0,%1", T'Asm_Output ("=f", Y1), G'Asm_Input ("m", Y));
Asm ("mulg %1,%2,%0", T'Asm_Output ("=f", R),
(T'Asm_Input ("f", X1), T'Asm_Input ("f", Y1)));
Asm ("stg %1,%0", G'Asm_Output ("=m", R1), T'Asm_Input ("f", R));
return R1;
end Mul_G;
-----------
-- Neg_F --
-----------
function Neg_F (X : F) return F is
A, B : S;
C : F;
begin
Asm ("ldf %0,%1", S'Asm_Output ("=f", A), F'Asm_Input ("m", X));
Asm ("cpysn %1,%1,%0", S'Asm_Output ("=f", B), S'Asm_Input ("f", A));
Asm ("stf %1,%0", F'Asm_Output ("=m", C), S'Asm_Input ("f", B));
return C;
end Neg_F;
-----------
-- Neg_G --
-----------
function Neg_G (X : G) return G is
A, B : T;
C : G;
begin
Asm ("ldg %0,%1", T'Asm_Output ("=f", A), G'Asm_Input ("m", X));
Asm ("cpysn %1,%1,%0", T'Asm_Output ("=f", B), T'Asm_Input ("f", A));
Asm ("stg %1,%0", G'Asm_Output ("=m", C), T'Asm_Input ("f", B));
return C;
end Neg_G;
--------
-- pd --
--------
procedure pd (Arg : D) is
begin
Put_Line (D'Image (Arg));
end pd;
--------
-- pf --
--------
procedure pf (Arg : F) is
begin
Put_Line (F'Image (Arg));
end pf;
--------
-- pg --
--------
procedure pg (Arg : G) is
begin
Put_Line (G'Image (Arg));
end pg;
-----------
-- Sub_F --
-----------
function Sub_F (X, Y : F) return F is
X1, Y1, R : S;
R1 : F;
begin
Asm ("ldf %0,%1", S'Asm_Output ("=f", X1), F'Asm_Input ("m", X));
Asm ("ldf %0,%1", S'Asm_Output ("=f", Y1), F'Asm_Input ("m", Y));
Asm ("subf %1,%2,%0", S'Asm_Output ("=f", R),
(S'Asm_Input ("f", X1), S'Asm_Input ("f", Y1)));
Asm ("stf %1,%0", F'Asm_Output ("=m", R1), S'Asm_Input ("f", R));
return R1;
end Sub_F;
-----------
-- Sub_G --
-----------
function Sub_G (X, Y : G) return G is
X1, Y1, R : T;
R1 : G;
begin
Asm ("ldg %0,%1", T'Asm_Output ("=f", X1), G'Asm_Input ("m", X));
Asm ("ldg %0,%1", T'Asm_Output ("=f", Y1), G'Asm_Input ("m", Y));
Asm ("subg %1,%2,%0", T'Asm_Output ("=f", R),
(T'Asm_Input ("f", X1), T'Asm_Input ("f", Y1)));
Asm ("stg %1,%0", G'Asm_Output ("=m", R1), T'Asm_Input ("f", R));
return R1;
end Sub_G;
end System.Vax_Float_Operations;
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