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1 706 jeremybenn 
------------------------------------------------------------------------------
2 
--                                                                          --
3 
--                         GNAT COMPILER COMPONENTS                         --
4 
--                                                                          --
5 
--                       S Y S T E M . A U X _ D E C                        --
6 
--                                                                          --
7 
--                                 B o d y                                  --
8 
--                                                                          --
9 
--          Copyright (C) 1992-2011, Free Software Foundation, Inc.         --
10 
--                                                                          --
11 
-- GNAT is free software;  you can  redistribute it  and/Or modify it under --
12 
-- terms of the  GNU General Public License as published  by the Free Soft- --
13 
-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
14 
-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
15 
-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
16 
-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
17 
--                                                                          --
18 
-- As a special exception under Section 7 of GPL version 3, you are granted --
19 
-- additional permissions described in the GCC Runtime Library Exception,   --
20 
-- version 3.1, as published by the Free Software Foundation.               --
21 
--                                                                          --
22 
-- You should have received a copy of the GNU General Public License and    --
23 
-- a copy of the GCC Runtime Library Exception along with this program;     --
24 
-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
25 
-- <http://www.gnu.org/licenses/>.                                          --
26 
--                                                                          --
27 
-- GNAT was originally developed  by the GNAT team at  New York University. --
28 
-- Extensive contributions were provided by Ada Core Technologies Inc.      --
29 
--                                                                          --
30 
------------------------------------------------------------------------------
31 
 
32 
--  This is the Alpha/VMS version.
33 
 
34 
pragma Style_Checks (All_Checks);
35 
--  Turn off alpha ordering check on subprograms, this unit is laid
36 
--  out to correspond to the declarations in the DEC 83 System unit.
37 
 
38 
with System.Machine_Code; use System.Machine_Code;
39 
package body System.Aux_DEC is
40 
 
41 
   ------------------------
42 
   -- Fetch_From_Address --
43 
   ------------------------
44 
 
45 
   function Fetch_From_Address (A : Address) return Target is
46 
      type T_Ptr is access all Target;
47 
      function To_T_Ptr is new Ada.Unchecked_Conversion (Address, T_Ptr);
48 
      Ptr : constant T_Ptr := To_T_Ptr (A);
49 
   begin
50 
      return Ptr.all;
51 
   end Fetch_From_Address;
52 
 
53 
   -----------------------
54 
   -- Assign_To_Address --
55 
   -----------------------
56 
 
57 
   procedure Assign_To_Address (A : Address; T : Target) is
58 
      type T_Ptr is access all Target;
59 
      function To_T_Ptr is new Ada.Unchecked_Conversion (Address, T_Ptr);
60 
      Ptr : constant T_Ptr := To_T_Ptr (A);
61 
   begin
62 
      Ptr.all := T;
63 
   end Assign_To_Address;
64 
 
65 
   -----------------------
66 
   -- Clear_Interlocked --
67 
   -----------------------
68 
 
69 
   procedure Clear_Interlocked
70 
     (Bit       : in out Boolean;
71 
      Old_Value : out Boolean)
72 
   is
73 
      use ASCII;
74 
      Clr_Bit : Boolean := Bit;
75 
      Old_Bit : Boolean;
76 
 
77 
   begin
78 
      --  All these ASM sequences should be commented. I suggest defining
79 
      --  a constant called E which is LF & HT and then you have more space
80 
      --  for line by line comments ???
81 
 
82 
      System.Machine_Code.Asm
83 
        (
84 
         "lda $16, %2"      & LF & HT &
85 
         "mb"               & LF & HT &
86 
         "sll $16, 3, $17 " & LF & HT &
87 
         "bis $31, 1, $1"   & LF & HT &
88 
         "and $17, 63, $18" & LF & HT &
89 
         "bic $17, 63, $17" & LF & HT &
90 
         "sra $17, 3, $17"  & LF & HT &
91 
         "bis $31, 1, %1"   & LF & HT &
92 
         "sll %1, $18, $18" & LF & HT &
93 
         "1:"               & LF & HT &
94 
         "ldq_l $1, 0($17)" & LF & HT &
95 
         "and $1, $18, %1"  & LF & HT &
96 
         "bic $1, $18, $1"  & LF & HT &
97 
         "stq_c $1, 0($17)" & LF & HT &
98 
         "cmpeq %1, 0, %1"  & LF & HT &
99 
         "beq $1, 1b"       & LF & HT &
100 
         "mb"               & LF & HT &
101 
         "xor %1, 1, %1"    & LF & HT &
102 
         "trapb",
103 
         Outputs  => (Boolean'Asm_Output ("=m", Clr_Bit),
104 
                      Boolean'Asm_Output ("=r", Old_Bit)),
105 
         Inputs   => Boolean'Asm_Input ("m", Clr_Bit),
106 
         Clobber  => "$1, $16, $17, $18",
107 
         Volatile => True);
108 
 
109 
         Bit := Clr_Bit;
110 
         Old_Value := Old_Bit;
111 
   end Clear_Interlocked;
112 
 
113 
   procedure Clear_Interlocked
114 
     (Bit          : in out Boolean;
115 
      Old_Value    : out Boolean;
116 
      Retry_Count  : Natural;
117 
      Success_Flag : out Boolean)
118 
   is
119 
      use ASCII;
120 
      Clr_Bit : Boolean := Bit;
121 
      Succ, Old_Bit : Boolean;
122 
 
123 
   begin
124 
      System.Machine_Code.Asm
125 
        (
126 
         "lda $16, %3"      & LF & HT &
127 
         "mb"               & LF & HT &
128 
         "sll $16, 3, $18 " & LF & HT &
129 
         "bis $31, 1, %1"   & LF & HT &
130 
         "and $18, 63, $19" & LF & HT &
131 
         "bic $18, 63, $18" & LF & HT &
132 
         "sra $18, 3, $18"  & LF & HT &
133 
         "bis $31, %4, $17" & LF & HT &
134 
         "sll %1, $19, $19" & LF & HT &
135 
         "1:"               & LF & HT &
136 
         "ldq_l %2, 0($18)" & LF & HT &
137 
         "and %2, $19, %1"  & LF & HT &
138 
         "bic %2, $19, %2"  & LF & HT &
139 
         "stq_c %2, 0($18)" & LF & HT &
140 
         "beq %2, 2f"       & LF & HT &
141 
         "cmpeq %1, 0, %1"  & LF & HT &
142 
         "br 3f"            & LF & HT &
143 
         "2:"               & LF & HT &
144 
         "subq $17, 1, $17" & LF & HT &
145 
         "bgt $17, 1b"      & LF & HT &
146 
         "3:"               & LF & HT &
147 
         "mb"               & LF & HT &
148 
         "xor %1, 1, %1"    & LF & HT &
149 
         "trapb",
150 
         Outputs  => (Boolean'Asm_Output ("=m", Clr_Bit),
151 
                      Boolean'Asm_Output ("=r", Old_Bit),
152 
                      Boolean'Asm_Output ("=r", Succ)),
153 
         Inputs   => (Boolean'Asm_Input ("m", Clr_Bit),
154 
                      Natural'Asm_Input ("rJ", Retry_Count)),
155 
         Clobber  => "$16, $17, $18, $19",
156 
         Volatile => True);
157 
 
158 
         Bit := Clr_Bit;
159 
         Old_Value := Old_Bit;
160 
         Success_Flag := Succ;
161 
   end Clear_Interlocked;
162 
 
163 
   ---------------------
164 
   -- Set_Interlocked --
165 
   ---------------------
166 
 
167 
   procedure Set_Interlocked
168 
     (Bit       : in out Boolean;
169 
      Old_Value : out Boolean)
170 
   is
171 
      use ASCII;
172 
      Set_Bit : Boolean := Bit;
173 
      Old_Bit : Boolean;
174 
 
175 
   begin
176 
      --  Don't we need comments on these long asm sequences???
177 
 
178 
      System.Machine_Code.Asm
179 
        (
180 
         "lda $16, %2"      & LF & HT &
181 
         "sll $16, 3, $17 " & LF & HT &
182 
         "bis $31, 1, $1"   & LF & HT &
183 
         "and $17, 63, $18" & LF & HT &
184 
         "mb"               & LF & HT &
185 
         "bic $17, 63, $17" & LF & HT &
186 
         "sra $17, 3, $17"  & LF & HT &
187 
         "bis $31, 1, %1"   & LF & HT &
188 
         "sll %1, $18, $18" & LF & HT &
189 
         "1:"               & LF & HT &
190 
         "ldq_l $1, 0($17)" & LF & HT &
191 
         "and $1, $18, %1"  & LF & HT &
192 
         "bis $1, $18, $1"  & LF & HT &
193 
         "stq_c $1, 0($17)" & LF & HT &
194 
         "cmovne %1, 1, %1" & LF & HT &
195 
         "beq $1, 1b"       & LF & HT &
196 
         "mb"               & LF & HT &
197 
         "trapb",
198 
         Outputs  => (Boolean'Asm_Output ("=m", Set_Bit),
199 
                      Boolean'Asm_Output ("=r", Old_Bit)),
200 
         Inputs   => Boolean'Asm_Input ("m", Set_Bit),
201 
         Clobber  => "$1, $16, $17, $18",
202 
         Volatile => True);
203 
 
204 
         Bit := Set_Bit;
205 
         Old_Value := Old_Bit;
206 
   end Set_Interlocked;
207 
 
208 
   procedure Set_Interlocked
209 
     (Bit          : in out Boolean;
210 
      Old_Value    : out Boolean;
211 
      Retry_Count  : Natural;
212 
      Success_Flag : out Boolean)
213 
   is
214 
      use ASCII;
215 
      Set_Bit : Boolean := Bit;
216 
      Succ, Old_Bit : Boolean;
217 
 
218 
   begin
219 
      System.Machine_Code.Asm
220 
        (
221 
         "lda $16, %3"      & LF & HT &  --  Address of Bit
222 
         "mb"               & LF & HT &
223 
         "sll $16, 3, $18 " & LF & HT &  --  Byte address to bit address
224 
         "bis $31, 1, %1"   & LF & HT &  --  Set temp to 1 for the sll
225 
         "and $18, 63, $19" & LF & HT &  --  Quadword bit offset
226 
         "bic $18, 63, $18" & LF & HT &  --  Quadword bit address
227 
         "sra $18, 3, $18"  & LF & HT &  --  Quadword address
228 
         "bis $31, %4, $17" & LF & HT &  --  Retry_Count -> $17
229 
         "sll %1, $19, $19" & LF &       --  $19 = 1 << bit_offset
230 
         "1:"               & LF & HT &
231 
         "ldq_l %2, 0($18)" & LF & HT &  --  Load & lock
232 
         "and %2, $19, %1"  & LF & HT &  --  Previous value -> %1
233 
         "bis %2, $19, %2"  & LF & HT &  --  Set Bit
234 
         "stq_c %2, 0($18)" & LF & HT &  --  Store conditional
235 
         "beq %2, 2f"       & LF & HT &  --  Goto 2: if failed
236 
         "cmovne %1, 1, %1" & LF & HT &  --  Set Old_Bit
237 
         "br 3f"            & LF &
238 
         "2:"               & LF & HT &
239 
         "subq $17, 1, $17" & LF & HT &  --  Retry_Count - 1
240 
         "bgt $17, 1b"      & LF &       --  Retry ?
241 
         "3:"               & LF & HT &
242 
         "mb"               & LF & HT &
243 
         "trapb",
244 
         Outputs  => (Boolean'Asm_Output ("=m", Set_Bit),
245 
                      Boolean'Asm_Output ("=r", Old_Bit),
246 
                      Boolean'Asm_Output ("=r", Succ)),
247 
         Inputs   => (Boolean'Asm_Input ("m", Set_Bit),
248 
                      Natural'Asm_Input ("rJ", Retry_Count)),
249 
         Clobber  => "$16, $17, $18, $19",
250 
         Volatile => True);
251 
 
252 
         Bit := Set_Bit;
253 
         Old_Value := Old_Bit;
254 
         Success_Flag := Succ;
255 
   end Set_Interlocked;
256 
 
257 
   ---------------------
258 
   -- Add_Interlocked --
259 
   ---------------------
260 
 
261 
   procedure Add_Interlocked
262 
     (Addend : Short_Integer;
263 
      Augend : in out Aligned_Word;
264 
      Sign   : out Integer)
265 
   is
266 
      use ASCII;
267 
      Overflowed : Boolean := False;
268 
 
269 
   begin
270 
      System.Machine_Code.Asm
271 
        (
272 
         "lda $18, %0"         & LF & HT &
273 
         "bic $18, 6, $21"     & LF & HT &
274 
         "mb"                  & LF & HT &
275 
         "1:"                  & LF & HT &
276 
         "ldq_l $0, 0($21)"    & LF & HT &
277 
         "extwl $0, $18, $19"  & LF & HT &
278 
         "mskwl $0, $18, $0"   & LF & HT &
279 
         "addq $19, %3, $20"   & LF & HT &
280 
         "inswl $20, $18, $17" & LF & HT &
281 
         "xor $19, %3, $19"    & LF & HT &
282 
         "bis $17, $0, $0"     & LF & HT &
283 
         "stq_c $0, 0($21)"    & LF & HT &
284 
         "beq $0, 1b"          & LF & HT &
285 
         "srl $20, 16, $0"     & LF & HT &
286 
         "mb"                  & LF & HT &
287 
         "srl $20, 12, $21"    & LF & HT &
288 
         "zapnot $20, 3, $20"  & LF & HT &
289 
         "and $0, 1, $0"       & LF & HT &
290 
         "and $21, 8, $21"     & LF & HT &
291 
         "bis $21, $0, $0"     & LF & HT &
292 
         "cmpeq $20, 0, $21"   & LF & HT &
293 
         "xor $20, 2, $20"     & LF & HT &
294 
         "sll $21, 2, $21"     & LF & HT &
295 
         "bis $21, $0, $0"     & LF & HT &
296 
         "bic $20, $19, $21"   & LF & HT &
297 
         "srl $21, 14, $21"    & LF & HT &
298 
         "and $21, 2, $21"     & LF & HT &
299 
         "bis $21, $0, $0"     & LF & HT &
300 
         "and $0, 2, %2"       & LF & HT &
301 
         "bne %2, 2f"          & LF & HT &
302 
         "and $0, 4, %1"       & LF & HT &
303 
         "cmpeq %1, 0, %1"     & LF & HT &
304 
         "and $0, 8, $0"       & LF & HT &
305 
         "lda $16, -1"         & LF & HT &
306 
         "cmovne $0, $16, %1"  & LF & HT &
307 
         "2:",
308 
         Outputs  => (Aligned_Word'Asm_Output ("=m", Augend),
309 
                      Integer'Asm_Output ("=r", Sign),
310 
                      Boolean'Asm_Output ("=r", Overflowed)),
311 
         Inputs   => (Short_Integer'Asm_Input ("r", Addend),
312 
                      Aligned_Word'Asm_Input ("m", Augend)),
313 
         Clobber  => "$0, $1, $16, $17, $18, $19, $20, $21",
314 
         Volatile => True);
315 
 
316 
         if Overflowed then
317 
            raise Constraint_Error;
318 
         end if;
319 
   end Add_Interlocked;
320 
 
321 
   ----------------
322 
   -- Add_Atomic --
323 
   ----------------
324 
 
325 
   procedure Add_Atomic
326 
     (To     : in out Aligned_Integer;
327 
      Amount : Integer)
328 
   is
329 
      use ASCII;
330 
 
331 
   begin
332 
      System.Machine_Code.Asm
333 
        (
334 
         "mb"              & LF &
335 
         "1:"              & LF & HT &
336 
         "ldl_l $1, %0"    & LF & HT &
337 
         "addl $1, %2, $0" & LF & HT &
338 
         "stl_c $0, %1"    & LF & HT &
339 
         "beq $0, 1b"      & LF & HT &
340 
         "mb",
341 
         Outputs  => Aligned_Integer'Asm_Output ("=m", To),
342 
         Inputs   => (Aligned_Integer'Asm_Input ("m", To),
343 
                      Integer'Asm_Input ("rJ", Amount)),
344 
         Clobber  => "$0, $1",
345 
         Volatile => True);
346 
   end Add_Atomic;
347 
 
348 
   procedure Add_Atomic
349 
     (To           : in out Aligned_Integer;
350 
      Amount       : Integer;
351 
      Retry_Count  : Natural;
352 
      Old_Value    : out Integer;
353 
      Success_Flag : out Boolean)
354 
   is
355 
      use ASCII;
356 
 
357 
   begin
358 
      System.Machine_Code.Asm
359 
        (
360 
         "mb"               & LF & HT &
361 
         "bis $31, %5, $17" & LF &
362 
         "1:"               & LF & HT &
363 
         "ldl_l $1, %0"     & LF & HT &
364 
         "addl $1, %4, $0"  & LF & HT &
365 
         "stl_c $0, %3"     & LF & HT &
366 
         "beq $0, 2f"       & LF &
367 
         "3:"               & LF & HT &
368 
         "mb"               & LF & HT &
369 
         "stq $0, %2"       & LF & HT &
370 
         "stl $1, %1"       & LF & HT &
371 
         "br 4f"            & LF &
372 
         "2:"               & LF & HT &
373 
         "subq $17, 1, $17" & LF & HT &
374 
         "bgt $17, 1b"      & LF & HT &
375 
         "br 3b"            & LF &
376 
         "4:",
377 
         Outputs  => (Aligned_Integer'Asm_Output ("=m", To),
378 
                      Integer'Asm_Output ("=m", Old_Value),
379 
                      Boolean'Asm_Output ("=m", Success_Flag)),
380 
         Inputs   => (Aligned_Integer'Asm_Input ("m", To),
381 
                      Integer'Asm_Input ("rJ", Amount),
382 
                      Natural'Asm_Input ("rJ", Retry_Count)),
383 
         Clobber  => "$0, $1, $17",
384 
         Volatile => True);
385 
   end Add_Atomic;
386 
 
387 
   procedure Add_Atomic
388 
     (To     : in out Aligned_Long_Integer;
389 
      Amount : Long_Integer)
390 
   is
391 
      use ASCII;
392 
 
393 
   begin
394 
      System.Machine_Code.Asm
395 
        (
396 
         "mb"              & LF &
397 
         "1:"              & LF & HT &
398 
         "ldq_l $1, %0"    & LF & HT &
399 
         "addq $1, %2, $0" & LF & HT &
400 
         "stq_c $0, %1"    & LF & HT &
401 
         "beq $0, 1b"      & LF & HT &
402 
         "mb",
403 
         Outputs  => Aligned_Long_Integer'Asm_Output ("=m", To),
404 
         Inputs   => (Aligned_Long_Integer'Asm_Input ("m", To),
405 
                      Long_Integer'Asm_Input ("rJ", Amount)),
406 
         Clobber  => "$0, $1",
407 
         Volatile => True);
408 
   end Add_Atomic;
409 
 
410 
   procedure Add_Atomic
411 
     (To           : in out Aligned_Long_Integer;
412 
      Amount       : Long_Integer;
413 
      Retry_Count  : Natural;
414 
      Old_Value    : out Long_Integer;
415 
      Success_Flag : out Boolean)
416 
   is
417 
      use ASCII;
418 
 
419 
   begin
420 
      System.Machine_Code.Asm
421 
        (
422 
         "mb"               & LF & HT &
423 
         "bis $31, %5, $17" & LF &
424 
         "1:"               & LF & HT &
425 
         "ldq_l $1, %0"     & LF & HT &
426 
         "addq $1, %4, $0"  & LF & HT &
427 
         "stq_c $0, %3"     & LF & HT &
428 
         "beq $0, 2f"       & LF &
429 
         "3:"               & LF & HT &
430 
         "mb"               & LF & HT &
431 
         "stq $0, %2"       & LF & HT &
432 
         "stq $1, %1"       & LF & HT &
433 
         "br 4f"            & LF &
434 
         "2:"               & LF & HT &
435 
         "subq $17, 1, $17" & LF & HT &
436 
         "bgt $17, 1b"      & LF & HT &
437 
         "br 3b"            & LF &
438 
         "4:",
439 
         Outputs  => (Aligned_Long_Integer'Asm_Output ("=m", To),
440 
                      Long_Integer'Asm_Output ("=m", Old_Value),
441 
                      Boolean'Asm_Output ("=m", Success_Flag)),
442 
         Inputs   => (Aligned_Long_Integer'Asm_Input ("m", To),
443 
                      Long_Integer'Asm_Input ("rJ", Amount),
444 
                      Natural'Asm_Input ("rJ", Retry_Count)),
445 
         Clobber  => "$0, $1, $17",
446 
         Volatile => True);
447 
   end Add_Atomic;
448 
 
449 
   ----------------
450 
   -- And_Atomic --
451 
   ----------------
452 
 
453 
   procedure And_Atomic
454 
     (To   : in out Aligned_Integer;
455 
      From : Integer)
456 
   is
457 
      use ASCII;
458 
 
459 
   begin
460 
      System.Machine_Code.Asm
461 
        (
462 
         "mb"             & LF &
463 
         "1:"             & LF & HT &
464 
         "ldl_l $1, %0"   & LF & HT &
465 
         "and $1, %2, $0" & LF & HT &
466 
         "stl_c $0, %1"   & LF & HT &
467 
         "beq $0, 1b"     & LF & HT &
468 
         "mb",
469 
         Outputs  => Aligned_Integer'Asm_Output ("=m", To),
470 
         Inputs   => (Aligned_Integer'Asm_Input ("m", To),
471 
                      Integer'Asm_Input ("rJ", From)),
472 
         Clobber  => "$0, $1",
473 
         Volatile => True);
474 
   end And_Atomic;
475 
 
476 
   procedure And_Atomic
477 
     (To           : in out Aligned_Integer;
478 
      From         : Integer;
479 
      Retry_Count  : Natural;
480 
      Old_Value    : out Integer;
481 
      Success_Flag : out Boolean)
482 
   is
483 
      use ASCII;
484 
 
485 
   begin
486 
      System.Machine_Code.Asm
487 
        (
488 
         "mb"               & LF & HT &
489 
         "bis $31, %5, $17" & LF &
490 
         "1:"               & LF & HT &
491 
         "ldl_l $1, %0"     & LF & HT &
492 
         "and $1, %4, $0"   & LF & HT &
493 
         "stl_c $0, %3"     & LF & HT &
494 
         "beq $0, 2f"       & LF &
495 
         "3:"               & LF & HT &
496 
         "mb"               & LF & HT &
497 
         "stq $0, %2"       & LF & HT &
498 
         "stl $1, %1"       & LF & HT &
499 
         "br 4f"            & LF &
500 
         "2:"               & LF & HT &
501 
         "subq $17, 1, $17" & LF & HT &
502 
         "bgt $17, 1b"      & LF & HT &
503 
         "br 3b"            & LF &
504 
         "4:",
505 
         Outputs  => (Aligned_Integer'Asm_Output ("=m", To),
506 
                      Integer'Asm_Output ("=m", Old_Value),
507 
                      Boolean'Asm_Output ("=m", Success_Flag)),
508 
         Inputs   => (Aligned_Integer'Asm_Input ("m", To),
509 
                      Integer'Asm_Input ("rJ", From),
510 
                      Natural'Asm_Input ("rJ", Retry_Count)),
511 
         Clobber  => "$0, $1, $17",
512 
         Volatile => True);
513 
   end And_Atomic;
514 
 
515 
   procedure And_Atomic
516 
     (To   : in out Aligned_Long_Integer;
517 
      From : Long_Integer)
518 
   is
519 
      use ASCII;
520 
 
521 
   begin
522 
      System.Machine_Code.Asm
523 
        (
524 
         "mb"             & LF &
525 
         "1:"             & LF & HT &
526 
         "ldq_l $1, %0"   & LF & HT &
527 
         "and $1, %2, $0" & LF & HT &
528 
         "stq_c $0, %1"   & LF & HT &
529 
         "beq $0, 1b"     & LF & HT &
530 
         "mb",
531 
         Outputs  => Aligned_Long_Integer'Asm_Output ("=m", To),
532 
         Inputs   => (Aligned_Long_Integer'Asm_Input ("m", To),
533 
                      Long_Integer'Asm_Input ("rJ", From)),
534 
         Clobber  => "$0, $1",
535 
         Volatile => True);
536 
   end And_Atomic;
537 
 
538 
   procedure And_Atomic
539 
     (To           : in out Aligned_Long_Integer;
540 
      From         : Long_Integer;
541 
      Retry_Count  : Natural;
542 
      Old_Value    : out Long_Integer;
543 
      Success_Flag : out Boolean)
544 
   is
545 
      use ASCII;
546 
 
547 
   begin
548 
      System.Machine_Code.Asm
549 
        (
550 
         "mb"               & LF & HT &
551 
         "bis $31, %5, $17" & LF &
552 
         "1:"               & LF & HT &
553 
         "ldq_l $1, %0"     & LF & HT &
554 
         "and $1, %4, $0"   & LF & HT &
555 
         "stq_c $0, %3"     & LF & HT &
556 
         "beq $0, 2f"       & LF &
557 
         "3:"               & LF & HT &
558 
         "mb"               & LF & HT &
559 
         "stq $0, %2"       & LF & HT &
560 
         "stq $1, %1"       & LF & HT &
561 
         "br 4f"            & LF &
562 
         "2:"               & LF & HT &
563 
         "subq $17, 1, $17" & LF & HT &
564 
         "bgt $17, 1b"      & LF & HT &
565 
         "br 3b"            & LF &
566 
         "4:",
567 
         Outputs  => (Aligned_Long_Integer'Asm_Output ("=m", To),
568 
                      Long_Integer'Asm_Output ("=m", Old_Value),
569 
                      Boolean'Asm_Output ("=m", Success_Flag)),
570 
         Inputs   => (Aligned_Long_Integer'Asm_Input ("m", To),
571 
                      Long_Integer'Asm_Input ("rJ", From),
572 
                      Natural'Asm_Input ("rJ", Retry_Count)),
573 
         Clobber  => "$0, $1, $17",
574 
         Volatile => True);
575 
   end And_Atomic;
576 
 
577 
   ---------------
578 
   -- Or_Atomic --
579 
   ---------------
580 
 
581 
   procedure Or_Atomic
582 
     (To   : in out Aligned_Integer;
583 
      From : Integer)
584 
   is
585 
      use ASCII;
586 
 
587 
   begin
588 
      System.Machine_Code.Asm
589 
        (
590 
         "mb"             & LF &
591 
         "1:"             & LF & HT &
592 
         "ldl_l $1, %0"   & LF & HT &
593 
         "bis $1, %2, $0" & LF & HT &
594 
         "stl_c $0, %1"   & LF & HT &
595 
         "beq $0, 1b"     & LF & HT &
596 
         "mb",
597 
         Outputs  => Aligned_Integer'Asm_Output ("=m", To),
598 
         Inputs   => (Aligned_Integer'Asm_Input ("m", To),
599 
                      Integer'Asm_Input ("rJ", From)),
600 
         Clobber  => "$0, $1",
601 
         Volatile => True);
602 
   end Or_Atomic;
603 
 
604 
   procedure Or_Atomic
605 
     (To           : in out Aligned_Integer;
606 
      From         : Integer;
607 
      Retry_Count  : Natural;
608 
      Old_Value    : out Integer;
609 
      Success_Flag : out Boolean)
610 
   is
611 
      use ASCII;
612 
 
613 
   begin
614 
      System.Machine_Code.Asm
615 
        (
616 
         "mb"               & LF & HT &
617 
         "bis $31, %5, $17" & LF &
618 
         "1:"               & LF & HT &
619 
         "ldl_l $1, %0"     & LF & HT &
620 
         "bis $1, %4, $0"   & LF & HT &
621 
         "stl_c $0, %3"     & LF & HT &
622 
         "beq $0, 2f"       & LF &
623 
         "3:"               & LF & HT &
624 
         "mb"               & LF & HT &
625 
         "stq $0, %2"       & LF & HT &
626 
         "stl $1, %1"       & LF & HT &
627 
         "br 4f"            & LF &
628 
         "2:"               & LF & HT &
629 
         "subq $17, 1, $17" & LF & HT &
630 
         "bgt $17, 1b"      & LF & HT &
631 
         "br 3b"            & LF &
632 
         "4:",
633 
         Outputs  => (Aligned_Integer'Asm_Output ("=m", To),
634 
                      Integer'Asm_Output ("=m", Old_Value),
635 
                      Boolean'Asm_Output ("=m", Success_Flag)),
636 
         Inputs   => (Aligned_Integer'Asm_Input ("m", To),
637 
                      Integer'Asm_Input ("rJ", From),
638 
                      Natural'Asm_Input ("rJ", Retry_Count)),
639 
         Clobber  => "$0, $1, $17",
640 
         Volatile => True);
641 
   end Or_Atomic;
642 
 
643 
   procedure Or_Atomic
644 
     (To   : in out Aligned_Long_Integer;
645 
      From : Long_Integer)
646 
   is
647 
      use ASCII;
648 
 
649 
   begin
650 
      System.Machine_Code.Asm
651 
        (
652 
         "mb"             & LF &
653 
         "1:"             & LF & HT &
654 
         "ldq_l $1, %0"   & LF & HT &
655 
         "bis $1, %2, $0" & LF & HT &
656 
         "stq_c $0, %1"   & LF & HT &
657 
         "beq $0, 1b"     & LF & HT &
658 
         "mb",
659 
         Outputs  => Aligned_Long_Integer'Asm_Output ("=m", To),
660 
         Inputs   => (Aligned_Long_Integer'Asm_Input ("m", To),
661 
                      Long_Integer'Asm_Input ("rJ", From)),
662 
         Clobber  => "$0, $1",
663 
         Volatile => True);
664 
   end Or_Atomic;
665 
 
666 
   procedure Or_Atomic
667 
     (To           : in out Aligned_Long_Integer;
668 
      From         : Long_Integer;
669 
      Retry_Count  : Natural;
670 
      Old_Value    : out Long_Integer;
671 
      Success_Flag : out Boolean)
672 
   is
673 
      use ASCII;
674 
 
675 
   begin
676 
      System.Machine_Code.Asm
677 
        (
678 
         "mb"               & LF & HT &
679 
         "bis $31, %5, $17" & LF &
680 
         "1:"               & LF & HT &
681 
         "ldq_l $1, %0"     & LF & HT &
682 
         "bis $1, %4, $0"   & LF & HT &
683 
         "stq_c $0, %3"     & LF & HT &
684 
         "beq $0, 2f"       & LF &
685 
         "3:"               & LF & HT &
686 
         "mb"               & LF & HT &
687 
         "stq $0, %2"       & LF & HT &
688 
         "stq $1, %1"       & LF & HT &
689 
         "br 4f"            & LF &
690 
         "2:"               & LF & HT &
691 
         "subq $17, 1, $17" & LF & HT &
692 
         "bgt $17, 1b"      & LF & HT &
693 
         "br 3b"            & LF &
694 
         "4:",
695 
         Outputs  => (Aligned_Long_Integer'Asm_Output ("=m", To),
696 
                      Long_Integer'Asm_Output ("=m", Old_Value),
697 
                      Boolean'Asm_Output ("=m", Success_Flag)),
698 
         Inputs   => (Aligned_Long_Integer'Asm_Input ("m", To),
699 
                      Long_Integer'Asm_Input ("rJ", From),
700 
                      Natural'Asm_Input ("rJ", Retry_Count)),
701 
         Clobber  => "$0, $1, $17",
702 
         Volatile => True);
703 
   end Or_Atomic;
704 
 
705 
   ------------
706 
   -- Insqhi --
707 
   ------------
708 
 
709 
   procedure Insqhi
710 
     (Item   : Address;
711 
      Header : Address;
712 
      Status : out Insq_Status)
713 
   is
714 
      use ASCII;
715 
 
716 
   begin
717 
      System.Machine_Code.Asm
718 
        (
719 
         "bis $31, %1, $17" & LF & HT &
720 
         "bis $31, %2, $16" & LF & HT &
721 
         "mb"               & LF & HT &
722 
         "call_pal 0x87"    & LF & HT &
723 
         "mb",
724 
         Outputs  => Insq_Status'Asm_Output ("=v", Status),
725 
         Inputs   => (Address'Asm_Input ("rJ", Item),
726 
                      Address'Asm_Input ("rJ", Header)),
727 
         Clobber  => "$16, $17",
728 
         Volatile => True);
729 
   end Insqhi;
730 
 
731 
   ------------
732 
   -- Remqhi --
733 
   ------------
734 
 
735 
   procedure Remqhi
736 
     (Header : Address;
737 
      Item   : out Address;
738 
      Status : out Remq_Status)
739 
   is
740 
      use ASCII;
741 
 
742 
   begin
743 
      System.Machine_Code.Asm
744 
        (
745 
         "bis $31, %2, $16" & LF & HT &
746 
         "mb"               & LF & HT &
747 
         "call_pal 0x93"    & LF & HT &
748 
         "mb"               & LF & HT &
749 
         "bis $31, $1, %1",
750 
         Outputs  => (Remq_Status'Asm_Output ("=v", Status),
751 
                      Address'Asm_Output ("=r", Item)),
752 
         Inputs   => Address'Asm_Input ("rJ", Header),
753 
         Clobber  => "$1, $16",
754 
         Volatile => True);
755 
   end Remqhi;
756 
 
757 
   ------------
758 
   -- Insqti --
759 
   ------------
760 
 
761 
   procedure Insqti
762 
     (Item   : Address;
763 
      Header : Address;
764 
      Status : out Insq_Status)
765 
   is
766 
      use ASCII;
767 
 
768 
   begin
769 
      System.Machine_Code.Asm
770 
        (
771 
         "bis $31, %1, $17" & LF & HT &
772 
         "bis $31, %2, $16" & LF & HT &
773 
         "mb"               & LF & HT &
774 
         "call_pal 0x88"    & LF & HT &
775 
         "mb",
776 
         Outputs  => Insq_Status'Asm_Output ("=v", Status),
777 
         Inputs   => (Address'Asm_Input ("rJ", Item),
778 
                      Address'Asm_Input ("rJ", Header)),
779 
         Clobber  => "$16, $17",
780 
         Volatile => True);
781 
   end Insqti;
782 
 
783 
   ------------
784 
   -- Remqti --
785 
   ------------
786 
 
787 
   procedure Remqti
788 
     (Header : Address;
789 
      Item   : out Address;
790 
      Status : out Remq_Status)
791 
   is
792 
      use ASCII;
793 
 
794 
   begin
795 
      System.Machine_Code.Asm
796 
        (
797 
         "bis $31, %2, $16" & LF & HT &
798 
         "mb"               & LF & HT &
799 
         "call_pal 0x94"    & LF & HT &
800 
         "mb"               & LF & HT &
801 
         "bis $31, $1, %1",
802 
         Outputs  => (Remq_Status'Asm_Output ("=v", Status),
803 
                      Address'Asm_Output ("=r", Item)),
804 
         Inputs   => Address'Asm_Input ("rJ", Header),
805 
         Clobber  => "$1, $16",
806 
         Volatile => True);
807 
   end Remqti;
808 
 
809 
end System.Aux_DEC;

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