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1 282 jeremybenn 
;; GCC machine description for MMIX
2 
;; Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2007
3 
;; Free Software Foundation, Inc.
4 
;; Contributed by Hans-Peter Nilsson (hp@bitrange.com)
5 
 
6 
;; This file is part of GCC.
7 
 
8 
;; GCC is free software; you can redistribute it and/or modify
9 
;; it under the terms of the GNU General Public License as published by
10 
;; the Free Software Foundation; either version 3, or (at your option)
11 
;; any later version.
12 
 
13 
;; GCC is distributed in the hope that it will be useful,
14 
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
15 
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 
;; GNU General Public License for more details.
17 
 
18 
;; You should have received a copy of the GNU General Public License
19 
;; along with GCC; see the file COPYING3.  If not see
20 
;; .
21 
 
22 
;; The original PO technology requires these to be ordered by speed,
23 
;; so that assigner will pick the fastest.
24 
 
25 
;; See file "rtl.def" for documentation on define_insn, match_*, et al.
26 
 
27 
;; Uses of UNSPEC in this file:
28 
;; UNSPEC_VOLATILE:
29 
;;
30 
;;      0        sync_icache (sync icache before trampoline jump)
31 
;;      1       nonlocal_goto_receiver
32 
;;
33 
 
34 
;; The order of insns is as in Node: Standard Names, with smaller modes
35 
;; before bigger modes.
36 
 
37 
(define_constants
38 
  [(MMIX_rJ_REGNUM 259)
39 
   (MMIX_rR_REGNUM 260)
40 
   (MMIX_fp_rO_OFFSET -24)]
41 
)
42 
 
43 
;; Operand and operator predicates.
44 
 
45 
(include "predicates.md")
46 
 
47 
;; FIXME: Can we remove the reg-to-reg for smaller modes?  Shouldn't they
48 
;; be synthesized ok?
49 
(define_insn "movqi"
50 
  [(set (match_operand:QI 0 "nonimmediate_operand" "=r,r ,r,x ,r,r,m,??r")
51 
        (match_operand:QI 1 "general_operand"       "r,LS,K,rI,x,m,r,n"))]
52 
  ""
53 
  "@
54 
   SET %0,%1
55 
   %s1 %0,%v1
56 
   NEGU %0,0,%n1
57 
   PUT %0,%1
58 
   GET %0,%1
59 
   LDB%U0 %0,%1
60 
   STBU %1,%0
61 
   %r0%I1")
62 
 
63 
(define_insn "movhi"
64 
  [(set (match_operand:HI 0 "nonimmediate_operand" "=r,r ,r ,x,r,r,m,??r")
65 
        (match_operand:HI 1 "general_operand"       "r,LS,K,r,x,m,r,n"))]
66 
  ""
67 
  "@
68 
   SET %0,%1
69 
   %s1 %0,%v1
70 
   NEGU %0,0,%n1
71 
   PUT %0,%1
72 
   GET %0,%1
73 
   LDW%U0 %0,%1
74 
   STWU %1,%0
75 
   %r0%I1")
76 
 
77 
;; gcc.c-torture/compile/920428-2.c fails if there's no "n".
78 
(define_insn "movsi"
79 
  [(set (match_operand:SI 0 "nonimmediate_operand" "=r,r ,r,x,r,r,m,??r")
80 
        (match_operand:SI 1 "general_operand"       "r,LS,K,r,x,m,r,n"))]
81 
  ""
82 
  "@
83 
   SET %0,%1
84 
   %s1 %0,%v1
85 
   NEGU %0,0,%n1
86 
   PUT %0,%1
87 
   GET %0,%1
88 
   LDT%U0 %0,%1
89 
   STTU %1,%0
90 
   %r0%I1")
91 
 
92 
;; We assume all "s" are addresses.  Does that hold?
93 
(define_insn "movdi"
94 
  [(set (match_operand:DI 0 "nonimmediate_operand" "=r,r ,r,x,r,m,r,m,r,r,??r")
95 
        (match_operand:DI 1 "general_operand"       "r,LS,K,r,x,I,m,r,R,s,n"))]
96 
  ""
97 
  "@
98 
   SET %0,%1
99 
   %s1 %0,%v1
100 
   NEGU %0,0,%n1
101 
   PUT %0,%1
102 
   GET %0,%1
103 
   STCO %1,%0
104 
   LDO %0,%1
105 
   STOU %1,%0
106 
   GETA %0,%1
107 
   LDA %0,%1
108 
   %r0%I1")
109 
 
110 
;; Note that we move around the float as a collection of bits; no
111 
;; conversion to double.
112 
(define_insn "movsf"
113 
 [(set (match_operand:SF 0 "nonimmediate_operand" "=r,r,x,r,r,m,??r")
114 
       (match_operand:SF 1 "general_operand"       "r,G,r,x,m,r,F"))]
115 
  ""
116 
  "@
117 
   SET %0,%1
118 
   SETL %0,0
119 
   PUT %0,%1
120 
   GET %0,%1
121 
   LDT %0,%1
122 
   STTU %1,%0
123 
   %r0%I1")
124 
 
125 
(define_insn "movdf"
126 
  [(set (match_operand:DF 0 "nonimmediate_operand" "=r,r,x,r,r,m,??r")
127 
        (match_operand:DF 1 "general_operand"       "r,G,r,x,m,r,F"))]
128 
  ""
129 
  "@
130 
   SET %0,%1
131 
   SETL %0,0
132 
   PUT %0,%1
133 
   GET %0,%1
134 
   LDO %0,%1
135 
   STOU %1,%0
136 
   %r0%I1")
137 
 
138 
;; We need to be able to move around the values used as condition codes.
139 
;; First spotted as reported in
140 
;;  due to
141 
;; changes in loop optimization.  The file machmode.def says they're of
142 
;; size 4 QI.  Valid bit-patterns correspond to integers -1, 0 and 1, so
143 
;; we treat them as signed entities; see mmix-modes.def.  The following
144 
;; expanders should cover all MODE_CC modes, and expand for this pattern.
145 
(define_insn "*movcc_expanded"
146 
  [(set (match_operand 0 "nonimmediate_operand" "=r,x,r,r,m")
147 
        (match_operand 1 "nonimmediate_operand"  "r,r,x,m,r"))]
148 
  "GET_MODE_CLASS (GET_MODE (operands[0])) == MODE_CC
149 
   && GET_MODE_CLASS (GET_MODE (operands[1])) == MODE_CC"
150 
  "@
151 
   SET %0,%1
152 
   PUT %0,%1
153 
   GET %0,%1
154 
   LDT %0,%1
155 
   STT %1,%0")
156 
 
157 
(define_expand "movcc"
158 
  [(set (match_operand:CC 0 "nonimmediate_operand" "")
159 
        (match_operand:CC 1 "nonimmediate_operand" ""))]
160 
  ""
161 
  "")
162 
 
163 
(define_expand "movcc_uns"
164 
  [(set (match_operand:CC_UNS 0 "nonimmediate_operand" "")
165 
        (match_operand:CC_UNS 1 "nonimmediate_operand" ""))]
166 
  ""
167 
  "")
168 
 
169 
(define_expand "movcc_fp"
170 
  [(set (match_operand:CC_FP 0 "nonimmediate_operand" "")
171 
        (match_operand:CC_FP 1 "nonimmediate_operand" ""))]
172 
  ""
173 
  "")
174 
 
175 
(define_expand "movcc_fpeq"
176 
  [(set (match_operand:CC_FPEQ 0 "nonimmediate_operand" "")
177 
        (match_operand:CC_FPEQ 1 "nonimmediate_operand" ""))]
178 
  ""
179 
  "")
180 
 
181 
(define_expand "movcc_fun"
182 
  [(set (match_operand:CC_FUN 0 "nonimmediate_operand" "")
183 
        (match_operand:CC_FUN 1 "nonimmediate_operand" ""))]
184 
  ""
185 
  "")
186 
 
187 
(define_insn "adddi3"
188 
  [(set (match_operand:DI 0 "register_operand"  "=r,r,r")
189 
        (plus:DI
190 
         (match_operand:DI 1 "register_operand" "%r,r,0")
191 
         (match_operand:DI 2 "mmix_reg_or_constant_operand" "rI,K,LS")))]
192 
  ""
193 
  "@
194 
   ADDU %0,%1,%2
195 
   SUBU %0,%1,%n2
196 
   %i2 %0,%v2")
197 
 
198 
(define_insn "adddf3"
199 
  [(set (match_operand:DF 0 "register_operand" "=r")
200 
        (plus:DF (match_operand:DF 1 "register_operand" "%r")
201 
                 (match_operand:DF 2 "register_operand" "r")))]
202 
  ""
203 
  "FADD %0,%1,%2")
204 
 
205 
;; Insn canonicalization *should* have removed the need for an integer
206 
;; in operand 2.
207 
(define_insn "subdi3"
208 
  [(set (match_operand:DI 0 "register_operand" "=r,r")
209 
        (minus:DI (match_operand:DI 1 "mmix_reg_or_8bit_operand" "r,I")
210 
                  (match_operand:DI 2 "register_operand" "r,r")))]
211 
  ""
212 
  "@
213 
   SUBU %0,%1,%2
214 
   NEGU %0,%1,%2")
215 
 
216 
(define_insn "subdf3"
217 
  [(set (match_operand:DF 0 "register_operand" "=r")
218 
        (minus:DF (match_operand:DF 1 "register_operand" "r")
219 
                  (match_operand:DF 2 "register_operand" "r")))]
220 
  ""
221 
  "FSUB %0,%1,%2")
222 
 
223 
;; FIXME: Should we define_expand and match 2, 4, 8 (etc) with shift (or
224 
;; %{something}2ADDU %0,%1,0)?  Hopefully GCC should still handle it, so
225 
;; we don't have to taint the machine description.  If results are bad
226 
;; enough, we may have to do it anyway.
227 
(define_insn "muldi3"
228 
  [(set (match_operand:DI 0 "register_operand" "=r,r")
229 
        (mult:DI (match_operand:DI 1 "register_operand" "%r,r")
230 
                 (match_operand:DI 2 "mmix_reg_or_8bit_operand" "O,rI")))
231 
   (clobber (match_scratch:DI 3 "=X,z"))]
232 
  ""
233 
  "@
234 
   %m2ADDU %0,%1,%1
235 
   MULU %0,%1,%2")
236 
 
237 
(define_insn "muldf3"
238 
  [(set (match_operand:DF 0 "register_operand" "=r")
239 
        (mult:DF (match_operand:DF 1 "register_operand" "r")
240 
                 (match_operand:DF 2 "register_operand" "r")))]
241 
  ""
242 
  "FMUL %0,%1,%2")
243 
 
244 
(define_insn "divdf3"
245 
  [(set (match_operand:DF 0 "register_operand" "=r")
246 
        (div:DF (match_operand:DF 1 "register_operand" "r")
247 
                (match_operand:DF 2 "register_operand" "r")))]
248 
  ""
249 
  "FDIV %0,%1,%2")
250 
 
251 
;; FIXME: Is "frem" doing the right operation for moddf3?
252 
(define_insn "moddf3"
253 
  [(set (match_operand:DF 0 "register_operand" "=r")
254 
        (mod:DF (match_operand:DF 1 "register_operand" "r")
255 
                (match_operand:DF 2 "register_operand" "r")))]
256 
  ""
257 
  "FREM %0,%1,%2")
258 
 
259 
;; FIXME: Should we define_expand for smin, smax, umin, umax using a
260 
;; nifty conditional sequence?
261 
 
262 
;; FIXME: The cuter andn combinations don't get here, presumably because
263 
;; they ended up in the constant pool.  Check: still?
264 
(define_insn "anddi3"
265 
  [(set (match_operand:DI 0 "register_operand" "=r,r")
266 
        (and:DI
267 
         (match_operand:DI 1 "register_operand" "%r,0")
268 
         (match_operand:DI 2 "mmix_reg_or_constant_operand" "rI,NT")))]
269 
  ""
270 
  "@
271 
   AND %0,%1,%2
272 
   %A2 %0,%V2")
273 
 
274 
(define_insn "iordi3"
275 
  [(set (match_operand:DI 0 "register_operand" "=r,r")
276 
        (ior:DI (match_operand:DI 1 "register_operand" "%r,0")
277 
                (match_operand:DI 2 "mmix_reg_or_constant_operand" "rH,LS")))]
278 
  ""
279 
  "@
280 
   OR %0,%1,%2
281 
   %o2 %0,%v2")
282 
 
283 
(define_insn "xordi3"
284 
  [(set (match_operand:DI 0 "register_operand" "=r")
285 
        (xor:DI (match_operand:DI 1 "register_operand" "%r")
286 
                (match_operand:DI 2 "mmix_reg_or_8bit_operand" "rI")))]
287 
  ""
288 
  "XOR %0,%1,%2")
289 
 
290 
;; FIXME:  When TImode works for other reasons (like cross-compiling from
291 
;; a 32-bit host), add back umulditi3 and umuldi3_highpart here.
292 
 
293 
;; FIXME: Check what's really reasonable for the mod part.
294 
 
295 
;; One day we might persuade GCC to expand divisions with constants the
296 
;; way MMIX does; giving the remainder the sign of the divisor.  But even
297 
;; then, it might be good to have an option to divide the way "everybody
298 
;; else" does.  Perhaps then, this option can be on by default.  However,
299 
;; it's not likely to happen because major (C, C++, Fortran) language
300 
;; standards in effect at 2002-04-29 reportedly demand that the sign of
301 
;; the remainder must follow the sign of the dividend.
302 
 
303 
(define_insn "divmoddi4"
304 
  [(set (match_operand:DI 0 "register_operand" "=r")
305 
        (div:DI (match_operand:DI 1 "register_operand" "r")
306 
                (match_operand:DI 2 "mmix_reg_or_8bit_operand" "rI")))
307 
   (set (match_operand:DI 3 "register_operand" "=y")
308 
        (mod:DI (match_dup 1) (match_dup 2)))]
309 
  ;; Do the library stuff later.
310 
  "TARGET_KNUTH_DIVISION"
311 
  "DIV %0,%1,%2")
312 
 
313 
(define_insn "udivmoddi4"
314 
  [(set (match_operand:DI 0 "register_operand" "=r")
315 
        (udiv:DI (match_operand:DI 1 "register_operand" "r")
316 
                 (match_operand:DI 2 "mmix_reg_or_8bit_operand" "rI")))
317 
   (set (match_operand:DI 3 "register_operand" "=y")
318 
        (umod:DI (match_dup 1) (match_dup 2)))]
319 
  ""
320 
  "DIVU %0,%1,%2")
321 
 
322 
(define_expand "divdi3"
323 
  [(parallel
324 
    [(set (match_operand:DI 0 "register_operand" "=&r")
325 
          (div:DI (match_operand:DI 1 "register_operand" "r")
326 
                  (match_operand:DI 2 "register_operand" "r")))
327 
     (clobber (scratch:DI))
328 
     (clobber (scratch:DI))
329 
     (clobber (reg:DI MMIX_rR_REGNUM))])]
330 
  "! TARGET_KNUTH_DIVISION"
331 
  "")
332 
 
333 
;; The %2-is-%1-case is there just to make sure things don't fail.  Could
334 
;; presumably happen with optimizations off; no evidence.
335 
(define_insn "*divdi3_nonknuth"
336 
  [(set (match_operand:DI 0 "register_operand" "=&r,&r")
337 
        (div:DI (match_operand:DI 1 "register_operand" "r,r")
338 
                (match_operand:DI 2 "register_operand" "1,r")))
339 
   (clobber (match_scratch:DI 3 "=1,1"))
340 
   (clobber (match_scratch:DI 4 "=2,2"))
341 
   (clobber (reg:DI MMIX_rR_REGNUM))]
342 
  "! TARGET_KNUTH_DIVISION"
343 
  "@
344 
   SETL %0,1
345 
   XOR $255,%1,%2\;NEGU %0,0,%2\;CSN %2,%2,%0\;NEGU %0,0,%1\;CSN %1,%1,%0\;\
346 
DIVU %0,%1,%2\;NEGU %1,0,%0\;CSN %0,$255,%1")
347 
 
348 
(define_expand "moddi3"
349 
  [(parallel
350 
    [(set (match_operand:DI 0 "register_operand" "=&r")
351 
          (mod:DI (match_operand:DI 1 "register_operand" "r")
352 
                  (match_operand:DI 2 "register_operand" "r")))
353 
     (clobber (scratch:DI))
354 
     (clobber (scratch:DI))
355 
     (clobber (reg:DI MMIX_rR_REGNUM))])]
356 
  "! TARGET_KNUTH_DIVISION"
357 
  "")
358 
 
359 
;; The %2-is-%1-case is there just to make sure things don't fail.  Could
360 
;; presumably happen with optimizations off; no evidence.
361 
(define_insn "*moddi3_nonknuth"
362 
  [(set (match_operand:DI 0 "register_operand" "=&r,&r")
363 
        (mod:DI (match_operand:DI 1 "register_operand" "r,r")
364 
                (match_operand:DI 2 "register_operand" "1,r")))
365 
   (clobber (match_scratch:DI 3 "=1,1"))
366 
   (clobber (match_scratch:DI 4 "=2,2"))
367 
   (clobber (reg:DI MMIX_rR_REGNUM))]
368 
  "! TARGET_KNUTH_DIVISION"
369 
  "@
370 
   SETL %0,0
371 
   NEGU %0,0,%2\;CSN %2,%2,%0\;NEGU $255,0,%1\;CSN %1,%1,$255\;\
372 
DIVU %1,%1,%2\;GET %0,:rR\;NEGU %2,0,%0\;CSNN %0,$255,%2")
373 
 
374 
(define_insn "ashldi3"
375 
  [(set (match_operand:DI 0 "register_operand" "=r")
376 
        (ashift:DI
377 
         (match_operand:DI 1 "register_operand" "r")
378 
         (match_operand:DI 2 "mmix_reg_or_8bit_operand" "rI")))]
379 
  ""
380 
  "SLU %0,%1,%2")
381 
 
382 
(define_insn "ashrdi3"
383 
  [(set (match_operand:DI 0 "register_operand" "=r")
384 
        (ashiftrt:DI
385 
         (match_operand:DI 1 "register_operand" "r")
386 
         (match_operand:DI 2 "mmix_reg_or_8bit_operand" "rI")))]
387 
  ""
388 
  "SR %0,%1,%2")
389 
 
390 
(define_insn "lshrdi3"
391 
  [(set (match_operand:DI 0 "register_operand" "=r")
392 
        (lshiftrt:DI
393 
         (match_operand:DI 1 "register_operand" "r")
394 
         (match_operand:DI 2 "mmix_reg_or_8bit_operand" "rI")))]
395 
  ""
396 
  "SRU %0,%1,%2")
397 
 
398 
(define_insn "negdi2"
399 
  [(set (match_operand:DI 0 "register_operand" "=r")
400 
        (neg:DI (match_operand:DI 1 "register_operand" "r")))]
401 
  ""
402 
  "NEGU %0,0,%1")
403 
 
404 
(define_expand "negdf2"
405 
  [(parallel [(set (match_operand:DF 0 "register_operand" "=r")
406 
                   (neg:DF (match_operand:DF 1 "register_operand" "r")))
407 
              (use (match_dup 2))])]
408 
  ""
409 
{
410 
  /* Emit bit-flipping sequence to be IEEE-safe wrt. -+0.  */
411 
  operands[2] = force_reg (DImode, GEN_INT ((HOST_WIDE_INT) 1 << 63));
412 
})
413 
 
414 
(define_insn "*expanded_negdf2"
415 
  [(set (match_operand:DF 0 "register_operand" "=r")
416 
        (neg:DF (match_operand:DF 1 "register_operand" "r")))
417 
   (use (match_operand:DI 2 "register_operand" "r"))]
418 
  ""
419 
  "XOR %0,%1,%2")
420 
 
421 
;; FIXME: define_expand for absdi2?
422 
 
423 
(define_insn "absdf2"
424 
  [(set (match_operand:DF 0 "register_operand" "=r")
425 
        (abs:DF (match_operand:DF 1 "register_operand" "0")))]
426 
  ""
427 
  "ANDNH %0,#8000")
428 
 
429 
(define_insn "sqrtdf2"
430 
  [(set (match_operand:DF 0 "register_operand" "=r")
431 
        (sqrt:DF (match_operand:DF 1 "register_operand" "r")))]
432 
  ""
433 
  "FSQRT %0,%1")
434 
 
435 
;; FIXME: define_expand for ffssi2? (not ffsdi2 since int is SImode).
436 
 
437 
(define_insn "one_cmpldi2"
438 
  [(set (match_operand:DI 0 "register_operand" "=r")
439 
        (not:DI (match_operand:DI 1 "register_operand" "r")))]
440 
  ""
441 
  "NOR %0,%1,0")
442 
 
443 
;; When the user-patterns expand, the resulting insns will match the
444 
;; patterns below.
445 
 
446 
;; We can fold the signed-compare where the register value is
447 
;; already equal to (compare:CCTYPE (reg) (const_int 0)).
448 
;;  We can't do that at all for floating-point, due to NaN, +0.0
449 
;; and -0.0, and we can only do it for the non/zero test of
450 
;; unsigned, so that has to be done another way.
451 
;;  FIXME: Perhaps a peep2 changing CCcode to a new code, that
452 
;; gets folded here.
453 
(define_insn "*cmpdi_folded"
454 
  [(set (match_operand:CC 0 "register_operand" "=r")
455 
        (compare:CC
456 
         (match_operand:DI 1 "register_operand" "r")
457 
         (const_int 0)))]
458 
  ;; FIXME: Can we test equivalence any other way?
459 
  ;; FIXME: Can we fold any other way?
460 
  "REG_P (operands[0]) && REG_P (operands[1])
461 
   && REGNO (operands[1]) == REGNO (operands[0])"
462 
  "%% folded: cmp %0,%1,0")
463 
 
464 
(define_insn "*cmps"
465 
  [(set (match_operand:CC 0 "register_operand" "=r")
466 
        (compare:CC
467 
         (match_operand:DI 1 "register_operand" "r")
468 
         (match_operand:DI 2 "mmix_reg_or_8bit_operand" "rI")))]
469 
  ""
470 
  "CMP %0,%1,%2")
471 
 
472 
(define_insn "*cmpu"
473 
  [(set (match_operand:CC_UNS 0 "register_operand" "=r")
474 
        (compare:CC_UNS
475 
         (match_operand:DI 1 "register_operand" "r")
476 
         (match_operand:DI 2 "mmix_reg_or_8bit_operand" "rI")))]
477 
  ""
478 
  "CMPU %0,%1,%2")
479 
 
480 
(define_insn "*fcmp"
481 
  [(set (match_operand:CC_FP 0 "register_operand" "=r")
482 
        (compare:CC_FP
483 
         (match_operand:DF 1 "register_operand" "r")
484 
         (match_operand:DF 2 "register_operand" "r")))]
485 
  ""
486 
  "FCMP%e0 %0,%1,%2")
487 
 
488 
;; FIXME: for -mieee, add fsub %0,%1,%1\;fsub %0,%2,%2 before to
489 
;; make signalling compliant.
490 
(define_insn "*feql"
491 
  [(set (match_operand:CC_FPEQ 0 "register_operand" "=r")
492 
        (compare:CC_FPEQ
493 
         (match_operand:DF 1 "register_operand" "r")
494 
         (match_operand:DF 2 "register_operand" "r")))]
495 
  ""
496 
  "FEQL%e0 %0,%1,%2")
497 
 
498 
(define_insn "*fun"
499 
  [(set (match_operand:CC_FUN 0 "register_operand" "=r")
500 
        (compare:CC_FUN
501 
         (match_operand:DF 1 "register_operand" "r")
502 
         (match_operand:DF 2 "register_operand" "r")))]
503 
  ""
504 
  "FUN%e0 %0,%1,%2")
505 
 
506 
;; In order to get correct rounding, we have to use SFLOT and SFLOTU for
507 
;; conversion.  They do not convert to SFmode; they convert to DFmode,
508 
;; with rounding as of SFmode.  They are not usable as is, but we pretend
509 
;; we have a single instruction but emit two.
510 
 
511 
;; Note that this will (somewhat unexpectedly) create an inexact
512 
;; exception if rounding is necessary - has to be masked off in crt0?
513 
(define_expand "floatdisf2"
514 
  [(parallel [(set (match_operand:SF 0 "nonimmediate_operand" "=rm")
515 
                   (float:SF
516 
                    (match_operand:DI 1 "mmix_reg_or_8bit_operand" "rI")))
517 
              ;; Let's use a DI scratch, since SF don't generally get into
518 
              ;; registers.  Dunno what's best; it's really a DF, but that
519 
              ;; doesn't logically follow from operands in the pattern.
520 
              (clobber (match_scratch:DI 2 "=&r"))])]
521 
  ""
522 
  "
523 
{
524 
  if (GET_CODE (operands[0]) != MEM)
525 
    {
526 
      rtx stack_slot;
527 
 
528 
      /* FIXME: This stack-slot remains even at -O3.  There must be a
529 
         better way.  */
530 
      stack_slot
531 
        = validize_mem (assign_stack_temp (SFmode,
532 
                                           GET_MODE_SIZE (SFmode), 0));
533 
      emit_insn (gen_floatdisf2 (stack_slot, operands[1]));
534 
      emit_move_insn (operands[0], stack_slot);
535 
      DONE;
536 
    }
537 
}")
538 
 
539 
(define_insn "*floatdisf2_real"
540 
  [(set (match_operand:SF 0 "memory_operand" "=m")
541 
        (float:SF
542 
         (match_operand:DI 1 "mmix_reg_or_8bit_operand" "rI")))
543 
   (clobber (match_scratch:DI 2 "=&r"))]
544 
  ""
545 
  "SFLOT %2,%1\;STSF %2,%0")
546 
 
547 
(define_expand "floatunsdisf2"
548 
  [(parallel [(set (match_operand:SF 0 "nonimmediate_operand" "=rm")
549 
                   (unsigned_float:SF
550 
                    (match_operand:DI 1 "mmix_reg_or_8bit_operand" "rI")))
551 
              ;; Let's use a DI scratch, since SF don't generally get into
552 
              ;; registers.  Dunno what's best; it's really a DF, but that
553 
              ;; doesn't logically follow from operands in the pattern.
554 
              (clobber (scratch:DI))])]
555 
  ""
556 
  "
557 
{
558 
  if (GET_CODE (operands[0]) != MEM)
559 
    {
560 
      rtx stack_slot;
561 
 
562 
      /* FIXME: This stack-slot remains even at -O3.  Must be a better
563 
         way.  */
564 
      stack_slot
565 
        = validize_mem (assign_stack_temp (SFmode,
566 
                                           GET_MODE_SIZE (SFmode), 0));
567 
      emit_insn (gen_floatunsdisf2 (stack_slot, operands[1]));
568 
      emit_move_insn (operands[0], stack_slot);
569 
      DONE;
570 
    }
571 
}")
572 
 
573 
(define_insn "*floatunsdisf2_real"
574 
  [(set (match_operand:SF 0 "memory_operand" "=m")
575 
        (unsigned_float:SF
576 
         (match_operand:DI 1 "mmix_reg_or_8bit_operand" "rI")))
577 
   (clobber (match_scratch:DI 2 "=&r"))]
578 
  ""
579 
  "SFLOTU %2,%1\;STSF %2,%0")
580 
 
581 
;; Note that this will (somewhat unexpectedly) create an inexact
582 
;; exception if rounding is necessary - has to be masked off in crt0?
583 
(define_insn "floatdidf2"
584 
  [(set (match_operand:DF 0 "register_operand" "=r")
585 
        (float:DF
586 
         (match_operand:DI 1 "mmix_reg_or_8bit_operand" "rI")))]
587 
  ""
588 
  "FLOT %0,%1")
589 
 
590 
(define_insn "floatunsdidf2"
591 
  [(set (match_operand:DF 0 "register_operand" "=r")
592 
        (unsigned_float:DF
593 
         (match_operand:DI 1 "mmix_reg_or_8bit_operand" "rI")))]
594 
  ""
595 
  "FLOTU %0,%1")
596 
 
597 
(define_insn "ftruncdf2"
598 
  [(set (match_operand:DF 0 "register_operand" "=r")
599 
        (fix:DF (match_operand:DF 1 "register_operand" "r")))]
600 
  ""
601 
  ;; ROUND_OFF
602 
  "FINT %0,1,%1")
603 
 
604 
;; Note that this will (somewhat unexpectedly) create an inexact
605 
;; exception if rounding is necessary - has to be masked off in crt0?
606 
(define_insn "fix_truncdfdi2"
607 
  [(set (match_operand:DI 0 "register_operand" "=r")
608 
        (fix:DI (fix:DF (match_operand:DF 1 "register_operand" "r"))))]
609 
  ""
610 
  ;; ROUND_OFF
611 
  "FIX %0,1,%1")
612 
 
613 
(define_insn "fixuns_truncdfdi2"
614 
  [(set (match_operand:DI 0 "register_operand" "=r")
615 
        (unsigned_fix:DI
616 
         (fix:DF (match_operand:DF 1 "register_operand" "r"))))]
617 
  ""
618 
  ;; ROUND_OFF
619 
  "FIXU %0,1,%1")
620 
 
621 
;; It doesn't seem like it's possible to have memory_operand as a
622 
;; predicate here (testcase: libgcc2 floathisf).  FIXME:  Shouldn't it be
623 
;; possible to do that?  Bug in GCC?  Anyway, this used to be a simple
624 
;; pattern with a memory_operand predicate, but was split up with a
625 
;; define_expand with the old pattern as "anonymous".
626 
;; FIXME: Perhaps with SECONDARY_MEMORY_NEEDED?
627 
(define_expand "truncdfsf2"
628 
  [(set (match_operand:SF 0 "memory_operand" "")
629 
        (float_truncate:SF (match_operand:DF 1 "register_operand" "")))]
630 
  ""
631 
  "
632 
{
633 
  if (GET_CODE (operands[0]) != MEM)
634 
    {
635 
      /* FIXME: There should be a way to say: 'put this in operands[0]
636 
         but *after* the expanded insn'.  */
637 
      rtx stack_slot;
638 
 
639 
      /* There is no sane destination but a register here, if it wasn't
640 
         already MEM.  (It's too hard to get fatal_insn to work here.)  */
641 
      if (! REG_P (operands[0]))
642 
        internal_error (\"MMIX Internal: Bad truncdfsf2 expansion\");
643 
 
644 
      /* FIXME: This stack-slot remains even at -O3.  Must be a better
645 
         way.  */
646 
      stack_slot
647 
        = validize_mem (assign_stack_temp (SFmode,
648 
                                           GET_MODE_SIZE (SFmode), 0));
649 
      emit_insn (gen_truncdfsf2 (stack_slot, operands[1]));
650 
      emit_move_insn (operands[0], stack_slot);
651 
      DONE;
652 
    }
653 
}")
654 
 
655 
(define_insn "*truncdfsf2_real"
656 
  [(set (match_operand:SF 0 "memory_operand" "=m")
657 
        (float_truncate:SF (match_operand:DF 1 "register_operand" "r")))]
658 
  ""
659 
  "STSF %1,%0")
660 
 
661 
;; Same comment as for truncdfsf2.
662 
(define_expand "extendsfdf2"
663 
  [(set (match_operand:DF 0 "register_operand" "=r")
664 
        (float_extend:DF (match_operand:SF 1 "memory_operand" "m")))]
665 
  ""
666 
  "
667 
{
668 
  if (GET_CODE (operands[1]) != MEM)
669 
    {
670 
      rtx stack_slot;
671 
 
672 
      /* There is no sane destination but a register here, if it wasn't
673 
         already MEM.  (It's too hard to get fatal_insn to work here.)  */
674 
      if (! REG_P (operands[0]))
675 
        internal_error (\"MMIX Internal: Bad extendsfdf2 expansion\");
676 
 
677 
      /* FIXME: This stack-slot remains even at -O3.  There must be a
678 
         better way.  */
679 
      stack_slot
680 
        = validize_mem (assign_stack_temp (SFmode,
681 
                                           GET_MODE_SIZE (SFmode), 0));
682 
      emit_move_insn (stack_slot, operands[1]);
683 
      emit_insn (gen_extendsfdf2 (operands[0], stack_slot));
684 
      DONE;
685 
    }
686 
}")
687 
 
688 
(define_insn "*extendsfdf2_real"
689 
  [(set (match_operand:DF 0 "register_operand" "=r")
690 
        (float_extend:DF (match_operand:SF 1 "memory_operand" "m")))]
691 
  ""
692 
  "LDSF %0,%1")
693 
 
694 
;; Neither sign-extend nor zero-extend are necessary; gcc knows how to
695 
;; synthesize using shifts or and, except with a memory source and not
696 
;; completely optimal.  FIXME: Actually, other bugs surface when those
697 
;; patterns are defined; fix later.
698 
 
699 
;; There are no sane values with the bit-patterns of (int) 0..255 except
700 
;; 0 to use in movdfcc.
701 
 
702 
(define_expand "movdfcc"
703 
  [(set (match_dup 4) (match_dup 5))
704 
   (set (match_operand:DF 0 "register_operand" "")
705 
        (if_then_else:DF
706 
         (match_operand 1 "comparison_operator" "")
707 
         (match_operand:DF 2 "mmix_reg_or_0_operand" "")
708 
         (match_operand:DF 3 "mmix_reg_or_0_operand" "")))]
709 
  ""
710 
  "
711 
{
712 
  enum rtx_code code = GET_CODE (operands[1]);
713 
  if (code == LE || code == GE)
714 
    FAIL;
715 
 
716 
  operands[4] = mmix_gen_compare_reg (code, XEXP (operands[1], 0),
717 
                                      XEXP (operands[1], 1));
718 
  operands[5] = gen_rtx_COMPARE (GET_MODE (operands[4]),
719 
                                 XEXP (operands[1], 0),
720 
                                 XEXP (operands[1], 1));
721 
  operands[1] = gen_rtx_fmt_ee (code, VOIDmode, operands[4], const0_rtx);
722 
}")
723 
 
724 
(define_expand "movdicc"
725 
  [(set (match_dup 4) (match_dup 5))
726 
   (set (match_operand:DI 0 "register_operand" "")
727 
        (if_then_else:DI
728 
         (match_operand 1 "comparison_operator" "")
729 
         (match_operand:DI 2 "mmix_reg_or_8bit_operand" "")
730 
         (match_operand:DI 3 "mmix_reg_or_8bit_operand" "")))]
731 
  ""
732 
  "
733 
{
734 
  enum rtx_code code = GET_CODE (operands[1]);
735 
  if (code == LE || code == GE)
736 
    FAIL;
737 
 
738 
  operands[4] = mmix_gen_compare_reg (code, XEXP (operands[1], 0),
739 
                                      XEXP (operands[1], 1));
740 
  operands[5] = gen_rtx_COMPARE (GET_MODE (operands[4]),
741 
                                 XEXP (operands[1], 0),
742 
                                 XEXP (operands[1], 1));
743 
  operands[1] = gen_rtx_fmt_ee (code, VOIDmode, operands[4], const0_rtx);
744 
}")
745 
 
746 
;; FIXME: Is this the right way to do "folding" of CCmode -> DImode?
747 
(define_insn "*movdicc_real_foldable"
748 
  [(set (match_operand:DI 0 "register_operand" "=r,r,r,r")
749 
        (if_then_else:DI
750 
         (match_operator 2 "mmix_foldable_comparison_operator"
751 
                         [(match_operand:DI 3 "register_operand" "r,r,r,r")
752 
                          (const_int 0)])
753 
         (match_operand:DI 1 "mmix_reg_or_8bit_operand" "rI,0 ,rI,GM")
754 
         (match_operand:DI 4 "mmix_reg_or_8bit_operand" "0 ,rI,GM,rI")))]
755 
  ""
756 
  "@
757 
   CS%d2 %0,%3,%1
758 
   CS%D2 %0,%3,%4
759 
   ZS%d2 %0,%3,%1
760 
   ZS%D2 %0,%3,%4")
761 
 
762 
(define_insn "*movdicc_real_reversible"
763 
  [(set
764 
    (match_operand:DI 0 "register_operand"         "=r ,r ,r ,r")
765 
    (if_then_else:DI
766 
     (match_operator
767 
      2 "mmix_comparison_operator"
768 
      [(match_operand 3 "mmix_reg_cc_operand"       "r ,r ,r ,r")
769 
      (const_int 0)])
770 
     (match_operand:DI 1 "mmix_reg_or_8bit_operand" "rI,0 ,rI,GM")
771 
     (match_operand:DI 4 "mmix_reg_or_8bit_operand" "0 ,rI,GM,rI")))]
772 
  "REVERSIBLE_CC_MODE (GET_MODE (operands[3]))"
773 
  "@
774 
   CS%d2 %0,%3,%1
775 
   CS%D2 %0,%3,%4
776 
   ZS%d2 %0,%3,%1
777 
   ZS%D2 %0,%3,%4")
778 
 
779 
(define_insn "*movdicc_real_nonreversible"
780 
  [(set
781 
    (match_operand:DI 0 "register_operand"         "=r ,r")
782 
    (if_then_else:DI
783 
     (match_operator
784 
      2 "mmix_comparison_operator"
785 
      [(match_operand 3 "mmix_reg_cc_operand"       "r ,r")
786 
      (const_int 0)])
787 
     (match_operand:DI 1 "mmix_reg_or_8bit_operand" "rI,rI")
788 
     (match_operand:DI 4 "mmix_reg_or_0_operand" "0 ,GM")))]
789 
  "!REVERSIBLE_CC_MODE (GET_MODE (operands[3]))"
790 
  "@
791 
   CS%d2 %0,%3,%1
792 
   ZS%d2 %0,%3,%1")
793 
 
794 
(define_insn "*movdfcc_real_foldable"
795 
  [(set
796 
    (match_operand:DF 0 "register_operand"      "=r  ,r  ,r  ,r")
797 
    (if_then_else:DF
798 
     (match_operator
799 
      2 "mmix_foldable_comparison_operator"
800 
      [(match_operand:DI 3 "register_operand"    "r  ,r  ,r  ,r")
801 
      (const_int 0)])
802 
     (match_operand:DF 1 "mmix_reg_or_0_operand" "rGM,0  ,rGM,GM")
803 
     (match_operand:DF 4 "mmix_reg_or_0_operand" "0  ,rGM,GM ,rGM")))]
804 
  ""
805 
  "@
806 
   CS%d2 %0,%3,%1
807 
   CS%D2 %0,%3,%4
808 
   ZS%d2 %0,%3,%1
809 
   ZS%D2 %0,%3,%4")
810 
 
811 
(define_insn "*movdfcc_real_reversible"
812 
  [(set
813 
    (match_operand:DF 0 "register_operand"      "=r  ,r  ,r  ,r")
814 
    (if_then_else:DF
815 
     (match_operator
816 
      2 "mmix_comparison_operator"
817 
      [(match_operand 3 "mmix_reg_cc_operand"    "r  ,r  ,r  ,r")
818 
      (const_int 0)])
819 
     (match_operand:DF 1 "mmix_reg_or_0_operand" "rGM,0  ,rGM,GM")
820 
     (match_operand:DF 4 "mmix_reg_or_0_operand" "0  ,rGM,GM ,rGM")))]
821 
  "REVERSIBLE_CC_MODE (GET_MODE (operands[3]))"
822 
  "@
823 
   CS%d2 %0,%3,%1
824 
   CS%D2 %0,%3,%4
825 
   ZS%d2 %0,%3,%1
826 
   ZS%D2 %0,%3,%4")
827 
 
828 
(define_insn "*movdfcc_real_nonreversible"
829 
  [(set
830 
    (match_operand:DF 0 "register_operand"      "=r  ,r")
831 
    (if_then_else:DF
832 
     (match_operator
833 
      2 "mmix_comparison_operator"
834 
      [(match_operand 3 "mmix_reg_cc_operand"    "r  ,r")
835 
      (const_int 0)])
836 
     (match_operand:DF 1 "mmix_reg_or_0_operand" "rGM,rGM")
837 
     (match_operand:DF 4 "mmix_reg_or_0_operand" "0  ,GM")))]
838 
  "!REVERSIBLE_CC_MODE (GET_MODE (operands[3]))"
839 
  "@
840 
   CS%d2 %0,%3,%1
841 
   ZS%d2 %0,%3,%1")
842 
 
843 
;; FIXME: scc insns will probably help, I just skip them
844 
;; right now.  Revisit.
845 
 
846 
(define_expand "cbranchdi4"
847 
  [(set (match_dup 4)
848 
        (match_op_dup 5
849 
         [(match_operand:DI 1 "register_operand" "")
850 
          (match_operand:DI 2 "mmix_reg_or_8bit_operand" "")]))
851 
   (set (pc)
852 
        (if_then_else
853 
              (match_operator 0 "ordered_comparison_operator"
854 
               [(match_dup 4)
855 
                (const_int 0)])
856 
              (label_ref (match_operand 3 "" ""))
857 
              (pc)))]
858 
  ""
859 
  "
860 
{
861 
  operands[4] = mmix_gen_compare_reg (GET_CODE (operands[0]),
862 
                                      operands[1], operands[2]);
863 
  operands[5] = gen_rtx_fmt_ee (COMPARE,
864 
                                GET_MODE (operands[4]),
865 
                                operands[1], operands[2]);
866 
}")
867 
 
868 
(define_expand "cbranchdf4"
869 
  [(set (match_dup 4)
870 
        (match_op_dup 5
871 
         [(match_operand:DF 1 "register_operand" "")
872 
          (match_operand:DF 2 "register_operand" "")]))
873 
   (set (pc)
874 
        (if_then_else
875 
              (match_operator 0 "float_comparison_operator"
876 
               [(match_dup 4)
877 
                (const_int 0)])
878 
              (label_ref (match_operand 3 "" ""))
879 
              (pc)))]
880 
  ""
881 
  "
882 
{
883 
  /* The head comment of optabs.c:can_compare_p says we're required to
884 
     implement this, so we have to clean up the mess here.  */
885 
  if (GET_CODE (operands[0]) == LE || GET_CODE (operands[0]) == GE)
886 
    {
887 
      enum rtx_code ltgt_code = GET_CODE (operands[0]) == LE ? LT : GT;
888 
      emit_cmp_and_jump_insns (operands[1], operands[2], ltgt_code, NULL_RTX,
889 
                               DFmode, 0, operands[3]);
890 
      emit_cmp_and_jump_insns (operands[1], operands[2], EQ, NULL_RTX,
891 
                               DFmode, 0, operands[3]);
892 
      DONE;
893 
    }
894 
 
895 
  operands[4] = mmix_gen_compare_reg (GET_CODE (operands[0]),
896 
                                      operands[1], operands[2]);
897 
  operands[5] = gen_rtx_fmt_ee (COMPARE,
898 
                                GET_MODE (operands[4]),
899 
                                operands[1], operands[2]);
900 
}")
901 
 
902 
 
903 
;; FIXME: we can emit an unordered-or-*not*-equal compare in one insn, but
904 
;; there's no RTL code for it.  Maybe revisit in future.
905 
 
906 
;; FIXME: Odd/Even matchers?
907 
(define_insn "*bCC_foldable"
908 
  [(set (pc)
909 
        (if_then_else
910 
         (match_operator 1 "mmix_foldable_comparison_operator"
911 
                         [(match_operand:DI 2 "register_operand" "r")
912 
                          (const_int 0)])
913 
         (label_ref (match_operand 0 "" ""))
914 
         (pc)))]
915 
  ""
916 
  "%+B%d1 %2,%0")
917 
 
918 
(define_insn "*bCC"
919 
  [(set (pc)
920 
        (if_then_else
921 
         (match_operator 1 "mmix_comparison_operator"
922 
                         [(match_operand 2 "mmix_reg_cc_operand" "r")
923 
                          (const_int 0)])
924 
         (label_ref (match_operand 0 "" ""))
925 
         (pc)))]
926 
  ""
927 
  "%+B%d1 %2,%0")
928 
 
929 
(define_insn "*bCC_inverted_foldable"
930 
  [(set (pc)
931 
        (if_then_else
932 
         (match_operator 1 "mmix_foldable_comparison_operator"
933 
                         [(match_operand:DI 2 "register_operand" "r")
934 
                          (const_int 0)])
935 
                      (pc)
936 
                      (label_ref (match_operand 0 "" ""))))]
937 
;; REVERSIBLE_CC_MODE is checked by mmix_foldable_comparison_operator.
938 
  ""
939 
  "%+B%D1 %2,%0")
940 
 
941 
(define_insn "*bCC_inverted"
942 
  [(set (pc)
943 
        (if_then_else
944 
         (match_operator 1 "mmix_comparison_operator"
945 
                         [(match_operand 2 "mmix_reg_cc_operand" "r")
946 
                          (const_int 0)])
947 
         (pc)
948 
         (label_ref (match_operand 0 "" ""))))]
949 
  "REVERSIBLE_CC_MODE (GET_MODE (operands[2]))"
950 
  "%+B%D1 %2,%0")
951 
 
952 
(define_expand "call"
953 
  [(parallel [(call (match_operand:QI 0 "memory_operand" "")
954 
                    (match_operand 1 "general_operand" ""))
955 
              (use (match_operand 2 "general_operand" ""))
956 
              (clobber (match_dup 4))])
957 
   (set (match_dup 4) (match_dup 3))]
958 
  ""
959 
  "
960 
{
961 
  /* The caller checks that the operand is generally valid as an
962 
     address, but at -O0 nothing makes sure that it's also a valid
963 
     call address for a *call*; a mmix_symbolic_or_address_operand.
964 
     Force into a register if it isn't.  */
965 
  if (!mmix_symbolic_or_address_operand (XEXP (operands[0], 0),
966 
                                         GET_MODE (XEXP (operands[0], 0))))
967 
    operands[0]
968 
      = replace_equiv_address (operands[0],
969 
                               force_reg (Pmode, XEXP (operands[0], 0)));
970 
 
971 
  /* Since the epilogue 'uses' the return address, and it is clobbered
972 
     in the call, and we set it back after every call (all but one setting
973 
     will be optimized away), integrity is maintained.  */
974 
  operands[3]
975 
    = mmix_get_hard_reg_initial_val (Pmode,
976 
                                     MMIX_INCOMING_RETURN_ADDRESS_REGNUM);
977 
 
978 
  /* FIXME: There's a bug in gcc which causes NULL to be passed as
979 
     operand[2] when we get out of registers, which later confuses gcc.
980 
     Work around it by replacing it with const_int 0.  Possibly documentation
981 
     error too.  */
982 
  if (operands[2] == NULL_RTX)
983 
    operands[2] = const0_rtx;
984 
 
985 
  operands[4] = gen_rtx_REG (DImode, MMIX_INCOMING_RETURN_ADDRESS_REGNUM);
986 
}")
987 
 
988 
(define_expand "call_value"
989 
  [(parallel [(set (match_operand 0 "" "")
990 
                   (call (match_operand:QI 1 "memory_operand" "")
991 
                         (match_operand 2 "general_operand" "")))
992 
              (use (match_operand 3 "general_operand" ""))
993 
              (clobber (match_dup 5))])
994 
   (set (match_dup 5) (match_dup 4))]
995 
  ""
996 
  "
997 
{
998 
  /* The caller checks that the operand is generally valid as an
999 
     address, but at -O0 nothing makes sure that it's also a valid
1000 
     call address for a *call*; a mmix_symbolic_or_address_operand.
1001 
     Force into a register if it isn't.  */
1002 
  if (!mmix_symbolic_or_address_operand (XEXP (operands[1], 0),
1003 
                                         GET_MODE (XEXP (operands[1], 0))))
1004 
    operands[1]
1005 
      = replace_equiv_address (operands[1],
1006 
                               force_reg (Pmode, XEXP (operands[1], 0)));
1007 
 
1008 
  /* Since the epilogue 'uses' the return address, and it is clobbered
1009 
     in the call, and we set it back after every call (all but one setting
1010 
     will be optimized away), integrity is maintained.  */
1011 
  operands[4]
1012 
    = mmix_get_hard_reg_initial_val (Pmode,
1013 
                                     MMIX_INCOMING_RETURN_ADDRESS_REGNUM);
1014 
 
1015 
  /* FIXME: See 'call'.  */
1016 
  if (operands[3] == NULL_RTX)
1017 
    operands[3] = const0_rtx;
1018 
 
1019 
  /* FIXME: Documentation bug: operands[3] (operands[2] for 'call') is the
1020 
     *next* argument register, not the number of arguments in registers.
1021 
     (There used to be code here where that mattered.)  */
1022 
 
1023 
  operands[5] = gen_rtx_REG (DImode, MMIX_INCOMING_RETURN_ADDRESS_REGNUM);
1024 
}")
1025 
 
1026 
;; Don't use 'p' here.  A 'p' must stand first in constraints, or reload
1027 
;; messes up, not registering the address for reload.  Several C++
1028 
;; testcases, including g++.brendan/crash40.C.  FIXME: This is arguably a
1029 
;; bug in gcc.  Note line ~2612 in reload.c, that does things on the
1030 
;; condition <> and the comment on
1031 
;; ~3017 that says:
1032 
;; <<   case 'p':
1033 
;;           /* All necessary reloads for an address_operand
1034 
;;              were handled in find_reloads_address.  */>>
1035 
;; Sorry, I have not dug deeper.  If symbolic addresses are used
1036 
;; rarely compared to addresses in registers, disparaging the
1037 
;; first ("p") alternative by adding ? in the first operand
1038 
;; might do the trick.  We define 'U' as a synonym to 'p', but without the
1039 
;; caveats (and very small advantages) of 'p'.
1040 
(define_insn "*call_real"
1041 
  [(call (mem:QI
1042 
          (match_operand:DI 0 "mmix_symbolic_or_address_operand" "s,rU"))
1043 
         (match_operand 1 "" ""))
1044 
   (use (match_operand 2 "" ""))
1045 
   (clobber (reg:DI MMIX_rJ_REGNUM))]
1046 
  ""
1047 
  "@
1048 
   PUSHJ $%p2,%0
1049 
   PUSHGO $%p2,%a0")
1050 
 
1051 
(define_insn "*call_value_real"
1052 
  [(set (match_operand 0 "register_operand" "=r,r")
1053 
        (call (mem:QI
1054 
               (match_operand:DI 1 "mmix_symbolic_or_address_operand" "s,rU"))
1055 
              (match_operand 2 "" "")))
1056 
  (use (match_operand 3 "" ""))
1057 
  (clobber (reg:DI MMIX_rJ_REGNUM))]
1058 
  ""
1059 
  "@
1060 
   PUSHJ $%p3,%1
1061 
   PUSHGO $%p3,%a1")
1062 
 
1063 
;; I hope untyped_call and untyped_return are not needed for MMIX.
1064 
;; Users of Objective-C will notice.
1065 
 
1066 
; Generated by GCC.
1067 
(define_expand "return"
1068 
  [(return)]
1069 
  "mmix_use_simple_return ()"
1070 
  "")
1071 
 
1072 
; Generated by the epilogue expander.
1073 
(define_insn "*expanded_return"
1074 
  [(return)]
1075 
  ""
1076 
  "POP %.,0")
1077 
 
1078 
(define_expand "prologue"
1079 
  [(const_int 0)]
1080 
  ""
1081 
  "mmix_expand_prologue (); DONE;")
1082 
 
1083 
; Note that the (return) from the expander itself is always the last insn
1084 
; in the epilogue.
1085 
(define_expand "epilogue"
1086 
  [(return)]
1087 
  ""
1088 
  "mmix_expand_epilogue ();")
1089 
 
1090 
(define_insn "nop"
1091 
  [(const_int 0)]
1092 
  ""
1093 
  "SWYM 0,0,0")
1094 
 
1095 
(define_insn "jump"
1096 
  [(set (pc) (label_ref (match_operand 0 "" "")))]
1097 
  ""
1098 
  "JMP %0")
1099 
 
1100 
(define_insn "indirect_jump"
1101 
  [(set (pc) (match_operand 0 "address_operand" "p"))]
1102 
  ""
1103 
  "GO $255,%a0")
1104 
 
1105 
;; FIXME: This is just a jump, and should be expanded to one.
1106 
(define_insn "tablejump"
1107 
  [(set (pc) (match_operand:DI 0 "address_operand" "p"))
1108 
   (use (label_ref (match_operand 1 "" "")))]
1109 
  ""
1110 
  "GO $255,%a0")
1111 
 
1112 
;; The only peculiar thing is that the register stack has to be unwound at
1113 
;; nonlocal_goto_receiver.  At each function that has a nonlocal label, we
1114 
;; save at function entry the location of the "alpha" register stack
1115 
;; pointer, rO, in a stack slot known to that function (right below where
1116 
;; the frame-pointer would be located).
1117 
;; In the nonlocal goto receiver, we unwind the register stack by a series
1118 
;; of "pop 0,0" until rO equals the saved value.  (If it goes lower, we
1119 
;; should die with a trap.)
1120 
(define_expand "nonlocal_goto_receiver"
1121 
  [(parallel [(unspec_volatile [(const_int 0)] 1)
1122 
              (clobber (scratch:DI))
1123 
              (clobber (reg:DI MMIX_rJ_REGNUM))])
1124 
   (set (reg:DI MMIX_rJ_REGNUM) (match_dup 0))]
1125 
  ""
1126 
  "
1127 
{
1128 
  operands[0]
1129 
    = mmix_get_hard_reg_initial_val (Pmode,
1130 
                                     MMIX_INCOMING_RETURN_ADDRESS_REGNUM);
1131 
 
1132 
  /* Mark this function as containing a landing-pad.  */
1133 
  cfun->machine->has_landing_pad = 1;
1134 
}")
1135 
 
1136 
;; GCC can insist on using saved registers to keep the slot address in
1137 
;; "across" the exception, or (perhaps) to use saved registers in the
1138 
;; address and re-use them after the register stack unwind, so it's best
1139 
;; to form the address ourselves.
1140 
(define_insn "*nonlocal_goto_receiver_expanded"
1141 
  [(unspec_volatile [(const_int 0)] 1)
1142 
   (clobber (match_scratch:DI 0 "=&r"))
1143 
   (clobber (reg:DI MMIX_rJ_REGNUM))]
1144 
  ""
1145 
{
1146 
  rtx temp_reg = operands[0];
1147 
  rtx my_operands[2];
1148 
  HOST_WIDEST_INT offs;
1149 
  const char *my_template
1150 
    = "GETA $255,0f\;PUT rJ,$255\;LDOU $255,%a0\n\
1151 
0:\;GET %1,rO\;CMPU %1,%1,$255\;BNP %1,1f\;POP 0,0\n1:";
1152 
 
1153 
  my_operands[1] = temp_reg;
1154 
 
1155 
  /* If we have a frame-pointer (hence unknown stack-pointer offset),
1156 
     just use the frame-pointer and the known offset.  */
1157 
  if (frame_pointer_needed)
1158 
    {
1159 
      my_operands[0] = GEN_INT (-MMIX_fp_rO_OFFSET);
1160 
 
1161 
      output_asm_insn ("NEGU %1,0,%0", my_operands);
1162 
      my_operands[0] = gen_rtx_PLUS (Pmode, frame_pointer_rtx, temp_reg);
1163 
    }
1164 
  else
1165 
    {
1166 
      /* We know the fp-based offset, so "eliminate" it to be sp-based.  */
1167 
      offs
1168 
        = (mmix_initial_elimination_offset (MMIX_FRAME_POINTER_REGNUM,
1169 
                                            MMIX_STACK_POINTER_REGNUM)
1170 
           + MMIX_fp_rO_OFFSET);
1171 
 
1172 
      if (offs >= 0 && offs <= 255)
1173 
        my_operands[0]
1174 
          = gen_rtx_PLUS (Pmode, stack_pointer_rtx, GEN_INT (offs));
1175 
      else
1176 
        {
1177 
          mmix_output_register_setting (asm_out_file, REGNO (temp_reg),
1178 
                                        offs, 1);
1179 
          my_operands[0] = gen_rtx_PLUS (Pmode, stack_pointer_rtx, temp_reg);
1180 
        }
1181 
    }
1182 
 
1183 
  output_asm_insn (my_template, my_operands);
1184 
  return "";
1185 
})
1186 
 
1187 
(define_insn "*Naddu"
1188 
  [(set (match_operand:DI 0 "register_operand" "=r")
1189 
        (plus:DI (mult:DI (match_operand:DI 1 "register_operand" "r")
1190 
                          (match_operand:DI 2 "const_int_operand" "n"))
1191 
                 (match_operand:DI 3 "mmix_reg_or_8bit_operand" "rI")))]
1192 
  "GET_CODE (operands[2]) == CONST_INT
1193 
   && (INTVAL (operands[2]) == 2
1194 
       || INTVAL (operands[2]) == 4
1195 
       || INTVAL (operands[2]) == 8
1196 
       || INTVAL (operands[2]) == 16)"
1197 
  "%2ADDU %0,%1,%3")
1198 
 
1199 
(define_insn "*andn"
1200 
  [(set (match_operand:DI 0 "register_operand" "=r")
1201 
        (and:DI
1202 
         (not:DI (match_operand:DI 1 "mmix_reg_or_8bit_operand" "rI"))
1203 
         (match_operand:DI 2 "register_operand" "r")))]
1204 
  ""
1205 
  "ANDN %0,%2,%1")
1206 
 
1207 
(define_insn "*nand"
1208 
  [(set (match_operand:DI 0 "register_operand" "=r")
1209 
        (ior:DI
1210 
         (not:DI (match_operand:DI 1 "register_operand" "%r"))
1211 
         (not:DI (match_operand:DI 2 "mmix_reg_or_8bit_operand" "rI"))))]
1212 
  ""
1213 
  "NAND %0,%1,%2")
1214 
 
1215 
(define_insn "*nor"
1216 
  [(set (match_operand:DI 0 "register_operand" "=r")
1217 
        (and:DI
1218 
         (not:DI (match_operand:DI 1 "register_operand" "%r"))
1219 
         (not:DI (match_operand:DI 2 "mmix_reg_or_8bit_operand" "rI"))))]
1220 
  ""
1221 
  "NOR %0,%1,%2")
1222 
 
1223 
(define_insn "*nxor"
1224 
  [(set (match_operand:DI 0 "register_operand" "=r")
1225 
        (not:DI
1226 
         (xor:DI (match_operand:DI 1 "register_operand" "%r")
1227 
                 (match_operand:DI 2 "mmix_reg_or_8bit_operand" "rI"))))]
1228 
  ""
1229 
  "NXOR %0,%1,%2")
1230 
 
1231 
(define_insn "sync_icache"
1232 
  [(unspec_volatile [(match_operand:DI 0 "memory_operand" "m")
1233 
                     (match_operand:DI 1 "const_int_operand" "I")] 0)]
1234 
  ""
1235 
  "SYNCID %1,%0")
1236 
 
1237 
;; Local Variables:
1238 
;; mode: lisp
1239 
;; indent-tabs-mode: t
1240 
;; End:

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