624 lines
17 KiB
Ada
624 lines
17 KiB
Ada
------------------------------------------------------------------------------
|
|
-- --
|
|
-- 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 --
|
|
-- --
|
|
-- $Revision: 1.15 $
|
|
-- --
|
|
-- 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. --
|
|
-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
|
|
-- --
|
|
------------------------------------------------------------------------------
|
|
|
|
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;
|