1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
5 -- S Y S T E M . V A X _ F L O A T _ O P E R A T I O N S --
10 -- Copyright (C) 1997-2000 Free Software Foundation, Inc. --
11 -- (Version for Alpha OpenVMS) --
13 -- GNAT is free software; you can redistribute it and/or modify it under --
14 -- terms of the GNU General Public License as published by the Free Soft- --
15 -- ware Foundation; either version 2, or (at your option) any later ver- --
16 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
17 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
18 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
19 -- for more details. You should have received a copy of the GNU General --
20 -- Public License distributed with GNAT; see file COPYING. If not, write --
21 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
22 -- MA 02111-1307, USA. --
24 -- As a special exception, if other files instantiate generics from this --
25 -- unit, or you link this unit with other files to produce an executable, --
26 -- this unit does not by itself cause the resulting executable to be --
27 -- covered by the GNU General Public License. This exception does not --
28 -- however invalidate any other reasons why the executable file might be --
29 -- covered by the GNU Public License. --
31 -- GNAT was originally developed by the GNAT team at New York University. --
32 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
34 ------------------------------------------------------------------------------
36 with System.IO; use System.IO;
37 with System.Machine_Code; use System.Machine_Code;
39 package body System.Vax_Float_Operations is
41 -- Ensure this gets compiled with -O to avoid extra (and possibly
42 -- improper) memory stores.
44 pragma Optimize (Time);
46 -- Declare the functions that do the conversions between floating-point
47 -- formats. Call the operands IEEE float so they get passed in
50 function Cvt_G_T (X : T) return T;
51 function Cvt_T_G (X : T) return T;
52 function Cvt_T_F (X : T) return S;
54 pragma Import (C, Cvt_G_T, "OTS$CVT_FLOAT_G_T");
55 pragma Import (C, Cvt_T_G, "OTS$CVT_FLOAT_T_G");
56 pragma Import (C, Cvt_T_F, "OTS$CVT_FLOAT_T_F");
58 -- In each of the conversion routines that are done with OTS calls,
59 -- we define variables of the corresponding IEEE type so that they are
60 -- passed and kept in the proper register class.
66 function D_To_G (X : D) return G is
71 Asm ("ldg %0,%1", T'Asm_Output ("=f", A), D'Asm_Input ("m", X));
72 Asm ("cvtdg %1,%0", T'Asm_Output ("=f", B), T'Asm_Input ("f", A));
73 Asm ("stg %1,%0", G'Asm_Output ("=m", C), T'Asm_Input ("f", B));
81 function F_To_G (X : F) return G is
86 Asm ("ldf %0,%1", T'Asm_Output ("=f", A), F'Asm_Input ("m", X));
87 Asm ("stg %1,%0", G'Asm_Output ("=m", B), T'Asm_Input ("f", A));
95 function F_To_S (X : F) return S is
100 -- Because converting to a wider FP format is a no-op, we say
101 -- A is 64-bit even though we are loading 32 bits into it.
102 Asm ("ldf %0,%1", T'Asm_Output ("=f", A), F'Asm_Input ("m", X));
104 B := S (Cvt_G_T (A));
112 function G_To_D (X : G) return D is
117 Asm ("ldg %0,%1", T'Asm_Output ("=f", A), G'Asm_Input ("m", X));
118 Asm ("cvtgd %1,%0", T'Asm_Output ("=f", B), T'Asm_Input ("f", A));
119 Asm ("stg %1,%0", D'Asm_Output ("=m", C), T'Asm_Input ("f", B));
127 function G_To_F (X : G) return F is
133 Asm ("ldg %0,%1", T'Asm_Output ("=f", A), G'Asm_Input ("m", X));
134 Asm ("cvtgf %1,%0", S'Asm_Output ("=f", B), T'Asm_Input ("f", A));
135 Asm ("stf %1,%0", F'Asm_Output ("=m", C), S'Asm_Input ("f", B));
143 function G_To_Q (X : G) return Q is
148 Asm ("ldg %0,%1", T'Asm_Output ("=f", A), G'Asm_Input ("m", X));
149 Asm ("cvtgq %1,%0", Q'Asm_Output ("=f", B), T'Asm_Input ("f", A));
157 function G_To_T (X : G) return T is
161 Asm ("ldg %0,%1", T'Asm_Output ("=f", A), G'Asm_Input ("m", X));
170 function F_To_Q (X : F) return Q is
172 return G_To_Q (F_To_G (X));
179 function Q_To_F (X : Q) return F is
184 Asm ("cvtqf %1,%0", S'Asm_Output ("=f", A), Q'Asm_Input ("f", X));
185 Asm ("stf %1,%0", F'Asm_Output ("=m", B), S'Asm_Input ("f", A));
193 function Q_To_G (X : Q) return G is
198 Asm ("cvtqg %1,%0", T'Asm_Output ("=f", A), Q'Asm_Input ("f", X));
199 Asm ("stg %1,%0", G'Asm_Output ("=m", B), T'Asm_Input ("f", A));
207 function S_To_F (X : S) return F is
212 A := Cvt_T_F (T (X));
213 Asm ("stf %1,%0", F'Asm_Output ("=m", B), S'Asm_Input ("f", A));
221 function T_To_D (X : T) return D is
223 return G_To_D (T_To_G (X));
230 function T_To_G (X : T) return G is
236 Asm ("stg %1,%0", G'Asm_Output ("=m", B), T'Asm_Input ("f", A));
244 function Abs_F (X : F) return F is
249 Asm ("ldf %0,%1", S'Asm_Output ("=f", A), F'Asm_Input ("m", X));
250 Asm ("cpys $f31,%1,%0", S'Asm_Output ("=f", B), S'Asm_Input ("f", A));
251 Asm ("stf %1,%0", F'Asm_Output ("=m", C), S'Asm_Input ("f", B));
259 function Abs_G (X : G) return G is
264 Asm ("ldg %0,%1", T'Asm_Output ("=f", A), G'Asm_Input ("m", X));
265 Asm ("cpys $f31,%1,%0", T'Asm_Output ("=f", B), T'Asm_Input ("f", A));
266 Asm ("stg %1,%0", G'Asm_Output ("=m", C), T'Asm_Input ("f", B));
274 function Add_F (X, Y : F) return F is
279 Asm ("ldf %0,%1", S'Asm_Output ("=f", X1), F'Asm_Input ("m", X));
280 Asm ("ldf %0,%1", S'Asm_Output ("=f", Y1), F'Asm_Input ("m", Y));
281 Asm ("addf %1,%2,%0", S'Asm_Output ("=f", R),
282 (S'Asm_Input ("f", X1), S'Asm_Input ("f", Y1)));
283 Asm ("stf %1,%0", F'Asm_Output ("=m", R1), S'Asm_Input ("f", R));
291 function Add_G (X, Y : G) return G is
296 Asm ("ldg %0,%1", T'Asm_Output ("=f", X1), G'Asm_Input ("m", X));
297 Asm ("ldg %0,%1", T'Asm_Output ("=f", Y1), G'Asm_Input ("m", Y));
298 Asm ("addg %1,%2,%0", T'Asm_Output ("=f", R),
299 (T'Asm_Input ("f", X1), T'Asm_Input ("f", Y1)));
300 Asm ("stg %1,%0", G'Asm_Output ("=m", R1), T'Asm_Input ("f", R));
308 procedure Debug_Output_D (Arg : D) is
317 procedure Debug_Output_F (Arg : F) is
326 procedure Debug_Output_G (Arg : G) is
335 Debug_String_Buffer : String (1 .. 32);
336 -- Buffer used by all Debug_String_x routines for returning result
338 function Debug_String_D (Arg : D) return System.Address is
339 Image_String : constant String := D'Image (Arg) & ASCII.NUL;
340 Image_Size : constant Integer := Image_String'Length;
343 Debug_String_Buffer (1 .. Image_Size) := Image_String;
344 return Debug_String_Buffer (1)'Address;
351 function Debug_String_F (Arg : F) return System.Address is
352 Image_String : constant String := F'Image (Arg) & ASCII.NUL;
353 Image_Size : constant Integer := Image_String'Length;
356 Debug_String_Buffer (1 .. Image_Size) := Image_String;
357 return Debug_String_Buffer (1)'Address;
364 function Debug_String_G (Arg : G) return System.Address is
365 Image_String : constant String := G'Image (Arg) & ASCII.NUL;
366 Image_Size : constant Integer := Image_String'Length;
369 Debug_String_Buffer (1 .. Image_Size) := Image_String;
370 return Debug_String_Buffer (1)'Address;
377 function Div_F (X, Y : F) return F is
382 Asm ("ldf %0,%1", S'Asm_Output ("=f", X1), F'Asm_Input ("m", X));
383 Asm ("ldf %0,%1", S'Asm_Output ("=f", Y1), F'Asm_Input ("m", Y));
384 Asm ("divf %1,%2,%0", S'Asm_Output ("=f", R),
385 (S'Asm_Input ("f", X1), S'Asm_Input ("f", Y1)));
386 Asm ("stf %1,%0", F'Asm_Output ("=m", R1), S'Asm_Input ("f", R));
394 function Div_G (X, Y : G) return G is
399 Asm ("ldg %0,%1", T'Asm_Output ("=f", X1), G'Asm_Input ("m", X));
400 Asm ("ldg %0,%1", T'Asm_Output ("=f", Y1), G'Asm_Input ("m", Y));
401 Asm ("divg %1,%2,%0", T'Asm_Output ("=f", R),
402 (T'Asm_Input ("f", X1), T'Asm_Input ("f", Y1)));
403 Asm ("stg %1,%0", G'Asm_Output ("=m", R1), T'Asm_Input ("f", R));
411 function Eq_F (X, Y : F) return Boolean is
415 Asm ("ldf %0,%1", S'Asm_Output ("=f", X1), F'Asm_Input ("m", X));
416 Asm ("ldf %0,%1", S'Asm_Output ("=f", Y1), F'Asm_Input ("m", Y));
417 Asm ("cmpgeq %1,%2,%0", S'Asm_Output ("=f", R),
418 (S'Asm_Input ("f", X1), S'Asm_Input ("f", Y1)));
426 function Eq_G (X, Y : G) return Boolean is
430 Asm ("ldg %0,%1", T'Asm_Output ("=f", X1), G'Asm_Input ("m", X));
431 Asm ("ldg %0,%1", T'Asm_Output ("=f", Y1), G'Asm_Input ("m", Y));
432 Asm ("cmpgeq %1,%2,%0", T'Asm_Output ("=f", R),
433 (T'Asm_Input ("f", X1), T'Asm_Input ("f", Y1)));
441 function Le_F (X, Y : F) return Boolean is
445 Asm ("ldf %0,%1", S'Asm_Output ("=f", X1), F'Asm_Input ("m", X));
446 Asm ("ldf %0,%1", S'Asm_Output ("=f", Y1), F'Asm_Input ("m", Y));
447 Asm ("cmpgle %1,%2,%0", S'Asm_Output ("=f", R),
448 (S'Asm_Input ("f", X1), S'Asm_Input ("f", Y1)));
456 function Le_G (X, Y : G) return Boolean is
460 Asm ("ldg %0,%1", T'Asm_Output ("=f", X1), G'Asm_Input ("m", X));
461 Asm ("ldg %0,%1", T'Asm_Output ("=f", Y1), G'Asm_Input ("m", Y));
462 Asm ("cmpgle %1,%2,%0", T'Asm_Output ("=f", R),
463 (T'Asm_Input ("f", X1), T'Asm_Input ("f", Y1)));
471 function Lt_F (X, Y : F) return Boolean is
475 Asm ("ldf %0,%1", S'Asm_Output ("=f", X1), F'Asm_Input ("m", X));
476 Asm ("ldf %0,%1", S'Asm_Output ("=f", Y1), F'Asm_Input ("m", Y));
477 Asm ("cmpglt %1,%2,%0", S'Asm_Output ("=f", R),
478 (S'Asm_Input ("f", X1), S'Asm_Input ("f", Y1)));
486 function Lt_G (X, Y : G) return Boolean is
490 Asm ("ldg %0,%1", T'Asm_Output ("=f", X1), G'Asm_Input ("m", X));
491 Asm ("ldg %0,%1", T'Asm_Output ("=f", Y1), G'Asm_Input ("m", Y));
492 Asm ("cmpglt %1,%2,%0", T'Asm_Output ("=f", R),
493 (T'Asm_Input ("f", X1), T'Asm_Input ("f", Y1)));
501 function Mul_F (X, Y : F) return F is
506 Asm ("ldf %0,%1", S'Asm_Output ("=f", X1), F'Asm_Input ("m", X));
507 Asm ("ldf %0,%1", S'Asm_Output ("=f", Y1), F'Asm_Input ("m", Y));
508 Asm ("mulf %1,%2,%0", S'Asm_Output ("=f", R),
509 (S'Asm_Input ("f", X1), S'Asm_Input ("f", Y1)));
510 Asm ("stf %1,%0", F'Asm_Output ("=m", R1), S'Asm_Input ("f", R));
518 function Mul_G (X, Y : G) return G is
523 Asm ("ldg %0,%1", T'Asm_Output ("=f", X1), G'Asm_Input ("m", X));
524 Asm ("ldg %0,%1", T'Asm_Output ("=f", Y1), G'Asm_Input ("m", Y));
525 Asm ("mulg %1,%2,%0", T'Asm_Output ("=f", R),
526 (T'Asm_Input ("f", X1), T'Asm_Input ("f", Y1)));
527 Asm ("stg %1,%0", G'Asm_Output ("=m", R1), T'Asm_Input ("f", R));
535 function Neg_F (X : F) return F is
540 Asm ("ldf %0,%1", S'Asm_Output ("=f", A), F'Asm_Input ("m", X));
541 Asm ("cpysn %1,%1,%0", S'Asm_Output ("=f", B), S'Asm_Input ("f", A));
542 Asm ("stf %1,%0", F'Asm_Output ("=m", C), S'Asm_Input ("f", B));
550 function Neg_G (X : G) return G is
555 Asm ("ldg %0,%1", T'Asm_Output ("=f", A), G'Asm_Input ("m", X));
556 Asm ("cpysn %1,%1,%0", T'Asm_Output ("=f", B), T'Asm_Input ("f", A));
557 Asm ("stg %1,%0", G'Asm_Output ("=m", C), T'Asm_Input ("f", B));
565 procedure pd (Arg : D) is
567 Put_Line (D'Image (Arg));
574 procedure pf (Arg : F) is
576 Put_Line (F'Image (Arg));
583 procedure pg (Arg : G) is
585 Put_Line (G'Image (Arg));
592 function Sub_F (X, Y : F) return F is
597 Asm ("ldf %0,%1", S'Asm_Output ("=f", X1), F'Asm_Input ("m", X));
598 Asm ("ldf %0,%1", S'Asm_Output ("=f", Y1), F'Asm_Input ("m", Y));
599 Asm ("subf %1,%2,%0", S'Asm_Output ("=f", R),
600 (S'Asm_Input ("f", X1), S'Asm_Input ("f", Y1)));
601 Asm ("stf %1,%0", F'Asm_Output ("=m", R1), S'Asm_Input ("f", R));
609 function Sub_G (X, Y : G) return G is
614 Asm ("ldg %0,%1", T'Asm_Output ("=f", X1), G'Asm_Input ("m", X));
615 Asm ("ldg %0,%1", T'Asm_Output ("=f", Y1), G'Asm_Input ("m", Y));
616 Asm ("subg %1,%2,%0", T'Asm_Output ("=f", R),
617 (T'Asm_Input ("f", X1), T'Asm_Input ("f", Y1)));
618 Asm ("stg %1,%0", G'Asm_Output ("=m", R1), T'Asm_Input ("f", R));
622 end System.Vax_Float_Operations;