1 ;; 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)
6 ;; This file is part of GCC.
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)
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.
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 ;; <http://www.gnu.org/licenses/>.
22 ;; The original PO technology requires these to be ordered by speed,
23 ;; so that assigner will pick the fastest.
25 ;; See file "rtl.def" for documentation on define_insn, match_*, et al.
27 ;; Uses of UNSPEC in this file:
30 ;; 0 sync_icache (sync icache before trampoline jump)
31 ;; 1 nonlocal_goto_receiver
34 ;; The order of insns is as in Node: Standard Names, with smaller modes
35 ;; before bigger modes.
40 (MMIX_fp_rO_OFFSET -24)]
43 ;; Operand and operator predicates.
45 (include "predicates.md")
47 ;; FIXME: Can we remove the reg-to-reg for smaller modes? Shouldn't they
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"))]
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"))]
77 ;; gcc.c-torture/compile/920428-2.c fails if there's no "n".
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"))]
92 ;; We assume all "s" are addresses. Does that hold?
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"))]
110 ;; Note that we move around the float as a collection of bits; no
111 ;; conversion to double.
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"))]
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"))]
138 ;; We need to be able to move around the values used as condition codes.
139 ;; First spotted as reported in
140 ;; <URL:http://gcc.gnu.org/ml/gcc-bugs/2003-03/msg00008.html> 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"
157 (define_expand "movcc"
158 [(set (match_operand:CC 0 "nonimmediate_operand" "")
159 (match_operand:CC 1 "nonimmediate_operand" ""))]
163 (define_expand "movcc_uns"
164 [(set (match_operand:CC_UNS 0 "nonimmediate_operand" "")
165 (match_operand:CC_UNS 1 "nonimmediate_operand" ""))]
169 (define_expand "movcc_fp"
170 [(set (match_operand:CC_FP 0 "nonimmediate_operand" "")
171 (match_operand:CC_FP 1 "nonimmediate_operand" ""))]
175 (define_expand "movcc_fpeq"
176 [(set (match_operand:CC_FPEQ 0 "nonimmediate_operand" "")
177 (match_operand:CC_FPEQ 1 "nonimmediate_operand" ""))]
181 (define_expand "movcc_fun"
182 [(set (match_operand:CC_FUN 0 "nonimmediate_operand" "")
183 (match_operand:CC_FUN 1 "nonimmediate_operand" ""))]
187 (define_insn "adddi3"
188 [(set (match_operand:DI 0 "register_operand" "=r,r,r")
190 (match_operand:DI 1 "register_operand" "%r,r,0")
191 (match_operand:DI 2 "mmix_reg_or_constant_operand" "rI,K,LS")))]
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")))]
205 ;; Insn canonicalization *should* have removed the need for an integer
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")))]
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")))]
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"))]
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")))]
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")))]
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")))]
259 ;; FIXME: Should we define_expand for smin, smax, umin, umax using a
260 ;; nifty conditional sequence?
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")
267 (match_operand:DI 1 "register_operand" "%r,0")
268 (match_operand:DI 2 "mmix_reg_or_constant_operand" "rI,NT")))]
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")))]
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")))]
290 ;; FIXME: When TImode works for other reasons (like cross-compiling from
291 ;; a 32-bit host), add back umulditi3 and umuldi3_highpart here.
293 ;; FIXME: Check what's really reasonable for the mod part.
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.
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"
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)))]
322 (define_expand "divdi3"
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"
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"
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")
348 (define_expand "moddi3"
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"
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"
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")
374 (define_insn "ashldi3"
375 [(set (match_operand:DI 0 "register_operand" "=r")
377 (match_operand:DI 1 "register_operand" "r")
378 (match_operand:DI 2 "mmix_reg_or_8bit_operand" "rI")))]
382 (define_insn "ashrdi3"
383 [(set (match_operand:DI 0 "register_operand" "=r")
385 (match_operand:DI 1 "register_operand" "r")
386 (match_operand:DI 2 "mmix_reg_or_8bit_operand" "rI")))]
390 (define_insn "lshrdi3"
391 [(set (match_operand:DI 0 "register_operand" "=r")
393 (match_operand:DI 1 "register_operand" "r")
394 (match_operand:DI 2 "mmix_reg_or_8bit_operand" "rI")))]
398 (define_insn "negdi2"
399 [(set (match_operand:DI 0 "register_operand" "=r")
400 (neg:DI (match_operand:DI 1 "register_operand" "r")))]
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))])]
410 /* Emit bit-flipping sequence to be IEEE-safe wrt. -+0. */
411 operands[2] = force_reg (DImode, GEN_INT ((HOST_WIDE_INT) 1 << 63));
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"))]
421 ;; FIXME: define_expand for absdi2?
423 (define_insn "absdf2"
424 [(set (match_operand:DF 0 "register_operand" "=r")
425 (abs:DF (match_operand:DF 1 "register_operand" "0")))]
429 (define_insn "sqrtdf2"
430 [(set (match_operand:DF 0 "register_operand" "=r")
431 (sqrt:DF (match_operand:DF 1 "register_operand" "r")))]
435 ;; FIXME: define_expand for ffssi2? (not ffsdi2 since int is SImode).
437 (define_insn "one_cmpldi2"
438 [(set (match_operand:DI 0 "register_operand" "=r")
439 (not:DI (match_operand:DI 1 "register_operand" "r")))]
443 ;; When the user-patterns expand, the resulting insns will match the
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
453 (define_insn "*cmpdi_folded"
454 [(set (match_operand:CC 0 "register_operand" "=r")
456 (match_operand:DI 1 "register_operand" "r")
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")
465 [(set (match_operand:CC 0 "register_operand" "=r")
467 (match_operand:DI 1 "register_operand" "r")
468 (match_operand:DI 2 "mmix_reg_or_8bit_operand" "rI")))]
473 [(set (match_operand:CC_UNS 0 "register_operand" "=r")
475 (match_operand:DI 1 "register_operand" "r")
476 (match_operand:DI 2 "mmix_reg_or_8bit_operand" "rI")))]
481 [(set (match_operand:CC_FP 0 "register_operand" "=r")
483 (match_operand:DF 1 "register_operand" "r")
484 (match_operand:DF 2 "register_operand" "r")))]
488 ;; FIXME: for -mieee, add fsub %0,%1,%1\;fsub %0,%2,%2 before to
489 ;; make signalling compliant.
491 [(set (match_operand:CC_FPEQ 0 "register_operand" "=r")
493 (match_operand:DF 1 "register_operand" "r")
494 (match_operand:DF 2 "register_operand" "r")))]
499 [(set (match_operand:CC_FUN 0 "register_operand" "=r")
501 (match_operand:DF 1 "register_operand" "r")
502 (match_operand:DF 2 "register_operand" "r")))]
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.
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")
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"))])]
524 if (GET_CODE (operands[0]) != MEM)
528 /* FIXME: This stack-slot remains even at -O3. There must be a
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);
539 (define_insn "*floatdisf2_real"
540 [(set (match_operand:SF 0 "memory_operand" "=m")
542 (match_operand:DI 1 "mmix_reg_or_8bit_operand" "rI")))
543 (clobber (match_scratch:DI 2 "=&r"))]
545 "SFLOT %2,%1\;STSF %2,%0")
547 (define_expand "floatunsdisf2"
548 [(parallel [(set (match_operand:SF 0 "nonimmediate_operand" "=rm")
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))])]
558 if (GET_CODE (operands[0]) != MEM)
562 /* FIXME: This stack-slot remains even at -O3. Must be a better
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);
573 (define_insn "*floatunsdisf2_real"
574 [(set (match_operand:SF 0 "memory_operand" "=m")
576 (match_operand:DI 1 "mmix_reg_or_8bit_operand" "rI")))
577 (clobber (match_scratch:DI 2 "=&r"))]
579 "SFLOTU %2,%1\;STSF %2,%0")
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")
586 (match_operand:DI 1 "mmix_reg_or_8bit_operand" "rI")))]
590 (define_insn "floatunsdidf2"
591 [(set (match_operand:DF 0 "register_operand" "=r")
593 (match_operand:DI 1 "mmix_reg_or_8bit_operand" "rI")))]
597 (define_insn "ftruncdf2"
598 [(set (match_operand:DF 0 "register_operand" "=r")
599 (fix:DF (match_operand:DF 1 "register_operand" "r")))]
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"))))]
613 (define_insn "fixuns_truncdfdi2"
614 [(set (match_operand:DI 0 "register_operand" "=r")
616 (fix:DF (match_operand:DF 1 "register_operand" "r"))))]
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" "")))]
633 if (GET_CODE (operands[0]) != MEM)
635 /* FIXME: There should be a way to say: 'put this in operands[0]
636 but *after* the expanded insn'. */
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\");
644 /* FIXME: This stack-slot remains even at -O3. Must be a better
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);
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")))]
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")))]
668 if (GET_CODE (operands[1]) != MEM)
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\");
677 /* FIXME: This stack-slot remains even at -O3. There must be a
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));
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")))]
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.
699 ;; There are no sane values with the bit-patterns of (int) 0..255 except
700 ;; 0 to use in movdfcc.
702 (define_expand "movdfcc"
703 [(set (match_dup 4) (match_dup 5))
704 (set (match_operand:DF 0 "register_operand" "")
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" "")))]
712 enum rtx_code code = GET_CODE (operands[1]);
713 if (code == LE || code == GE)
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);
724 (define_expand "movdicc"
725 [(set (match_dup 4) (match_dup 5))
726 (set (match_operand:DI 0 "register_operand" "")
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" "")))]
734 enum rtx_code code = GET_CODE (operands[1]);
735 if (code == LE || code == GE)
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);
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")
750 (match_operator 2 "mmix_foldable_comparison_operator"
751 [(match_operand:DI 3 "register_operand" "r,r,r,r")
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")))]
762 (define_insn "*movdicc_real_reversible"
764 (match_operand:DI 0 "register_operand" "=r ,r ,r ,r")
767 2 "mmix_comparison_operator"
768 [(match_operand 3 "mmix_reg_cc_operand" "r ,r ,r ,r")
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]))"
779 (define_insn "*movdicc_real_nonreversible"
781 (match_operand:DI 0 "register_operand" "=r ,r")
784 2 "mmix_comparison_operator"
785 [(match_operand 3 "mmix_reg_cc_operand" "r ,r")
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]))"
794 (define_insn "*movdfcc_real_foldable"
796 (match_operand:DF 0 "register_operand" "=r ,r ,r ,r")
799 2 "mmix_foldable_comparison_operator"
800 [(match_operand:DI 3 "register_operand" "r ,r ,r ,r")
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")))]
811 (define_insn "*movdfcc_real_reversible"
813 (match_operand:DF 0 "register_operand" "=r ,r ,r ,r")
816 2 "mmix_comparison_operator"
817 [(match_operand 3 "mmix_reg_cc_operand" "r ,r ,r ,r")
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]))"
828 (define_insn "*movdfcc_real_nonreversible"
830 (match_operand:DF 0 "register_operand" "=r ,r")
833 2 "mmix_comparison_operator"
834 [(match_operand 3 "mmix_reg_cc_operand" "r ,r")
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]))"
843 ;; FIXME: scc insns will probably help, I just skip them
844 ;; right now. Revisit.
846 (define_expand "cbranchdi4"
849 [(match_operand:DI 1 "register_operand" "")
850 (match_operand:DI 2 "mmix_reg_or_8bit_operand" "")]))
853 (match_operator 0 "ordered_comparison_operator"
856 (label_ref (match_operand 3 "" ""))
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]);
868 (define_expand "cbranchdf4"
871 [(match_operand:DF 1 "register_operand" "")
872 (match_operand:DF 2 "register_operand" "")]))
875 (match_operator 0 "float_comparison_operator"
878 (label_ref (match_operand 3 "" ""))
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)
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]);
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]);
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.
906 ;; FIXME: Odd/Even matchers?
907 (define_insn "*bCC_foldable"
910 (match_operator 1 "mmix_foldable_comparison_operator"
911 [(match_operand:DI 2 "register_operand" "r")
913 (label_ref (match_operand 0 "" ""))
921 (match_operator 1 "mmix_comparison_operator"
922 [(match_operand 2 "mmix_reg_cc_operand" "r")
924 (label_ref (match_operand 0 "" ""))
929 (define_insn "*bCC_inverted_foldable"
932 (match_operator 1 "mmix_foldable_comparison_operator"
933 [(match_operand:DI 2 "register_operand" "r")
936 (label_ref (match_operand 0 "" ""))))]
937 ;; REVERSIBLE_CC_MODE is checked by mmix_foldable_comparison_operator.
941 (define_insn "*bCC_inverted"
944 (match_operator 1 "mmix_comparison_operator"
945 [(match_operand 2 "mmix_reg_cc_operand" "r")
948 (label_ref (match_operand 0 "" ""))))]
949 "REVERSIBLE_CC_MODE (GET_MODE (operands[2]))"
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))]
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))))
968 = replace_equiv_address (operands[0],
969 force_reg (Pmode, XEXP (operands[0], 0)));
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. */
975 = mmix_get_hard_reg_initial_val (Pmode,
976 MMIX_INCOMING_RETURN_ADDRESS_REGNUM);
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
982 if (operands[2] == NULL_RTX)
983 operands[2] = const0_rtx;
985 operands[4] = gen_rtx_REG (DImode, MMIX_INCOMING_RETURN_ADDRESS_REGNUM);
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))]
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))))
1005 = replace_equiv_address (operands[1],
1006 force_reg (Pmode, XEXP (operands[1], 0)));
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. */
1012 = mmix_get_hard_reg_initial_val (Pmode,
1013 MMIX_INCOMING_RETURN_ADDRESS_REGNUM);
1015 /* FIXME: See 'call'. */
1016 if (operands[3] == NULL_RTX)
1017 operands[3] = const0_rtx;
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.) */
1023 operands[5] = gen_rtx_REG (DImode, MMIX_INCOMING_RETURN_ADDRESS_REGNUM);
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 <<else if (constraints[i][0] == 'p')>> and the comment on
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"
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))]
1051 (define_insn "*call_value_real"
1052 [(set (match_operand 0 "register_operand" "=r,r")
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))]
1063 ;; I hope untyped_call and untyped_return are not needed for MMIX.
1064 ;; Users of Objective-C will notice.
1067 (define_expand "return"
1069 "mmix_use_simple_return ()"
1072 ; Generated by the epilogue expander.
1073 (define_insn "*expanded_return"
1078 (define_expand "prologue"
1081 "mmix_expand_prologue (); DONE;")
1083 ; Note that the (return) from the expander itself is always the last insn
1085 (define_expand "epilogue"
1088 "mmix_expand_epilogue ();")
1096 [(set (pc) (label_ref (match_operand 0 "" "")))]
1100 (define_insn "indirect_jump"
1101 [(set (pc) (match_operand 0 "address_operand" "p"))]
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 "" "")))]
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))]
1129 = mmix_get_hard_reg_initial_val (Pmode,
1130 MMIX_INCOMING_RETURN_ADDRESS_REGNUM);
1132 /* Mark this function as containing a landing-pad. */
1133 cfun->machine->has_landing_pad = 1;
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))]
1146 rtx temp_reg = operands[0];
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:";
1153 my_operands[1] = temp_reg;
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)
1159 my_operands[0] = GEN_INT (-MMIX_fp_rO_OFFSET);
1161 output_asm_insn ("NEGU %1,0,%0", my_operands);
1162 my_operands[0] = gen_rtx_PLUS (Pmode, frame_pointer_rtx, temp_reg);
1166 /* We know the fp-based offset, so "eliminate" it to be sp-based. */
1168 = (mmix_initial_elimination_offset (MMIX_FRAME_POINTER_REGNUM,
1169 MMIX_STACK_POINTER_REGNUM)
1170 + MMIX_fp_rO_OFFSET);
1172 if (offs >= 0 && offs <= 255)
1174 = gen_rtx_PLUS (Pmode, stack_pointer_rtx, GEN_INT (offs));
1177 mmix_output_register_setting (asm_out_file, REGNO (temp_reg),
1179 my_operands[0] = gen_rtx_PLUS (Pmode, stack_pointer_rtx, temp_reg);
1183 output_asm_insn (my_template, my_operands);
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)"
1199 (define_insn "*andn"
1200 [(set (match_operand:DI 0 "register_operand" "=r")
1202 (not:DI (match_operand:DI 1 "mmix_reg_or_8bit_operand" "rI"))
1203 (match_operand:DI 2 "register_operand" "r")))]
1207 (define_insn "*nand"
1208 [(set (match_operand:DI 0 "register_operand" "=r")
1210 (not:DI (match_operand:DI 1 "register_operand" "%r"))
1211 (not:DI (match_operand:DI 2 "mmix_reg_or_8bit_operand" "rI"))))]
1216 [(set (match_operand:DI 0 "register_operand" "=r")
1218 (not:DI (match_operand:DI 1 "register_operand" "%r"))
1219 (not:DI (match_operand:DI 2 "mmix_reg_or_8bit_operand" "rI"))))]
1223 (define_insn "*nxor"
1224 [(set (match_operand:DI 0 "register_operand" "=r")
1226 (xor:DI (match_operand:DI 1 "register_operand" "%r")
1227 (match_operand:DI 2 "mmix_reg_or_8bit_operand" "rI"))))]
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)]
1239 ;; indent-tabs-mode: t