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 ;; Since we don't have cc0, we do what is recommended in the manual;
444 ;; store away the operands for use in the branch, scc or movcc insn.
445 (define_expand "cmpdi"
446 [(match_operand:DI 0 "register_operand" "")
447 (match_operand:DI 1 "mmix_reg_or_8bit_operand" "")]
451 mmix_compare_op0 = operands[0];
452 mmix_compare_op1 = operands[1];
456 (define_expand "cmpdf"
457 [(match_operand:DF 0 "register_operand" "")
458 (match_operand:DF 1 "register_operand" "")]
462 mmix_compare_op0 = operands[0];
463 mmix_compare_op1 = operands[1];
467 ;; When the user-patterns expand, the resulting insns will match the
470 ;; We can fold the signed-compare where the register value is
471 ;; already equal to (compare:CCTYPE (reg) (const_int 0)).
472 ;; We can't do that at all for floating-point, due to NaN, +0.0
473 ;; and -0.0, and we can only do it for the non/zero test of
474 ;; unsigned, so that has to be done another way.
475 ;; FIXME: Perhaps a peep2 changing CCcode to a new code, that
477 (define_insn "*cmpcc_folded"
478 [(set (match_operand:CC 0 "register_operand" "=r")
480 (match_operand:DI 1 "register_operand" "r")
482 ;; FIXME: Can we test equivalence any other way?
483 ;; FIXME: Can we fold any other way?
484 "REG_P (operands[0]) && REG_P (operands[1])
485 && REGNO (operands[1]) == REGNO (operands[0])"
486 "%% folded: cmp %0,%1,0")
488 (define_insn "*cmpcc"
489 [(set (match_operand:CC 0 "register_operand" "=r")
491 (match_operand:DI 1 "register_operand" "r")
492 (match_operand:DI 2 "mmix_reg_or_8bit_operand" "rI")))]
497 [(set (match_operand:CC_UNS 0 "register_operand" "=r")
499 (match_operand:DI 1 "register_operand" "r")
500 (match_operand:DI 2 "mmix_reg_or_8bit_operand" "rI")))]
505 [(set (match_operand:CC_FP 0 "register_operand" "=r")
507 (match_operand:DF 1 "register_operand" "r")
508 (match_operand:DF 2 "register_operand" "r")))]
512 ;; FIXME: for -mieee, add fsub %0,%1,%1\;fsub %0,%2,%2 before to
513 ;; make signalling compliant.
515 [(set (match_operand:CC_FPEQ 0 "register_operand" "=r")
517 (match_operand:DF 1 "register_operand" "r")
518 (match_operand:DF 2 "register_operand" "r")))]
523 [(set (match_operand:CC_FUN 0 "register_operand" "=r")
525 (match_operand:DF 1 "register_operand" "r")
526 (match_operand:DF 2 "register_operand" "r")))]
530 ;; In order to get correct rounding, we have to use SFLOT and SFLOTU for
531 ;; conversion. They do not convert to SFmode; they convert to DFmode,
532 ;; with rounding as of SFmode. They are not usable as is, but we pretend
533 ;; we have a single instruction but emit two.
535 ;; Note that this will (somewhat unexpectedly) create an inexact
536 ;; exception if rounding is necessary - has to be masked off in crt0?
537 (define_expand "floatdisf2"
538 [(parallel [(set (match_operand:SF 0 "nonimmediate_operand" "=rm")
540 (match_operand:DI 1 "mmix_reg_or_8bit_operand" "rI")))
541 ;; Let's use a DI scratch, since SF don't generally get into
542 ;; registers. Dunno what's best; it's really a DF, but that
543 ;; doesn't logically follow from operands in the pattern.
544 (clobber (match_scratch:DI 2 "=&r"))])]
548 if (GET_CODE (operands[0]) != MEM)
552 /* FIXME: This stack-slot remains even at -O3. There must be a
555 = validize_mem (assign_stack_temp (SFmode,
556 GET_MODE_SIZE (SFmode), 0));
557 emit_insn (gen_floatdisf2 (stack_slot, operands[1]));
558 emit_move_insn (operands[0], stack_slot);
563 (define_insn "*floatdisf2_real"
564 [(set (match_operand:SF 0 "memory_operand" "=m")
566 (match_operand:DI 1 "mmix_reg_or_8bit_operand" "rI")))
567 (clobber (match_scratch:DI 2 "=&r"))]
569 "SFLOT %2,%1\;STSF %2,%0")
571 (define_expand "floatunsdisf2"
572 [(parallel [(set (match_operand:SF 0 "nonimmediate_operand" "=rm")
574 (match_operand:DI 1 "mmix_reg_or_8bit_operand" "rI")))
575 ;; Let's use a DI scratch, since SF don't generally get into
576 ;; registers. Dunno what's best; it's really a DF, but that
577 ;; doesn't logically follow from operands in the pattern.
578 (clobber (scratch:DI))])]
582 if (GET_CODE (operands[0]) != MEM)
586 /* FIXME: This stack-slot remains even at -O3. Must be a better
589 = validize_mem (assign_stack_temp (SFmode,
590 GET_MODE_SIZE (SFmode), 0));
591 emit_insn (gen_floatunsdisf2 (stack_slot, operands[1]));
592 emit_move_insn (operands[0], stack_slot);
597 (define_insn "*floatunsdisf2_real"
598 [(set (match_operand:SF 0 "memory_operand" "=m")
600 (match_operand:DI 1 "mmix_reg_or_8bit_operand" "rI")))
601 (clobber (match_scratch:DI 2 "=&r"))]
603 "SFLOTU %2,%1\;STSF %2,%0")
605 ;; Note that this will (somewhat unexpectedly) create an inexact
606 ;; exception if rounding is necessary - has to be masked off in crt0?
607 (define_insn "floatdidf2"
608 [(set (match_operand:DF 0 "register_operand" "=r")
610 (match_operand:DI 1 "mmix_reg_or_8bit_operand" "rI")))]
614 (define_insn "floatunsdidf2"
615 [(set (match_operand:DF 0 "register_operand" "=r")
617 (match_operand:DI 1 "mmix_reg_or_8bit_operand" "rI")))]
621 (define_insn "ftruncdf2"
622 [(set (match_operand:DF 0 "register_operand" "=r")
623 (fix:DF (match_operand:DF 1 "register_operand" "r")))]
628 ;; Note that this will (somewhat unexpectedly) create an inexact
629 ;; exception if rounding is necessary - has to be masked off in crt0?
630 (define_insn "fix_truncdfdi2"
631 [(set (match_operand:DI 0 "register_operand" "=r")
632 (fix:DI (fix:DF (match_operand:DF 1 "register_operand" "r"))))]
637 (define_insn "fixuns_truncdfdi2"
638 [(set (match_operand:DI 0 "register_operand" "=r")
640 (fix:DF (match_operand:DF 1 "register_operand" "r"))))]
645 ;; It doesn't seem like it's possible to have memory_operand as a
646 ;; predicate here (testcase: libgcc2 floathisf). FIXME: Shouldn't it be
647 ;; possible to do that? Bug in GCC? Anyway, this used to be a simple
648 ;; pattern with a memory_operand predicate, but was split up with a
649 ;; define_expand with the old pattern as "anonymous".
650 ;; FIXME: Perhaps with SECONDARY_MEMORY_NEEDED?
651 (define_expand "truncdfsf2"
652 [(set (match_operand:SF 0 "memory_operand" "")
653 (float_truncate:SF (match_operand:DF 1 "register_operand" "")))]
657 if (GET_CODE (operands[0]) != MEM)
659 /* FIXME: There should be a way to say: 'put this in operands[0]
660 but *after* the expanded insn'. */
663 /* There is no sane destination but a register here, if it wasn't
664 already MEM. (It's too hard to get fatal_insn to work here.) */
665 if (! REG_P (operands[0]))
666 internal_error (\"MMIX Internal: Bad truncdfsf2 expansion\");
668 /* FIXME: This stack-slot remains even at -O3. Must be a better
671 = validize_mem (assign_stack_temp (SFmode,
672 GET_MODE_SIZE (SFmode), 0));
673 emit_insn (gen_truncdfsf2 (stack_slot, operands[1]));
674 emit_move_insn (operands[0], stack_slot);
679 (define_insn "*truncdfsf2_real"
680 [(set (match_operand:SF 0 "memory_operand" "=m")
681 (float_truncate:SF (match_operand:DF 1 "register_operand" "r")))]
685 ;; Same comment as for truncdfsf2.
686 (define_expand "extendsfdf2"
687 [(set (match_operand:DF 0 "register_operand" "=r")
688 (float_extend:DF (match_operand:SF 1 "memory_operand" "m")))]
692 if (GET_CODE (operands[1]) != MEM)
696 /* There is no sane destination but a register here, if it wasn't
697 already MEM. (It's too hard to get fatal_insn to work here.) */
698 if (! REG_P (operands[0]))
699 internal_error (\"MMIX Internal: Bad extendsfdf2 expansion\");
701 /* FIXME: This stack-slot remains even at -O3. There must be a
704 = validize_mem (assign_stack_temp (SFmode,
705 GET_MODE_SIZE (SFmode), 0));
706 emit_move_insn (stack_slot, operands[1]);
707 emit_insn (gen_extendsfdf2 (operands[0], stack_slot));
712 (define_insn "*extendsfdf2_real"
713 [(set (match_operand:DF 0 "register_operand" "=r")
714 (float_extend:DF (match_operand:SF 1 "memory_operand" "m")))]
718 ;; Neither sign-extend nor zero-extend are necessary; gcc knows how to
719 ;; synthesize using shifts or and, except with a memory source and not
720 ;; completely optimal. FIXME: Actually, other bugs surface when those
721 ;; patterns are defined; fix later.
723 ;; There are no sane values with the bit-patterns of (int) 0..255 except
724 ;; 0 to use in movdfcc.
726 (define_expand "movdfcc"
727 [(set (match_operand:DF 0 "register_operand" "")
729 (match_operand 1 "comparison_operator" "")
730 (match_operand:DF 2 "mmix_reg_or_0_operand" "")
731 (match_operand:DF 3 "mmix_reg_or_0_operand" "")))]
735 enum rtx_code code = GET_CODE (operands[1]);
736 rtx cc_reg = mmix_gen_compare_reg (code, mmix_compare_op0,
738 if (cc_reg == NULL_RTX)
740 operands[1] = gen_rtx_fmt_ee (code, VOIDmode, cc_reg, const0_rtx);
743 (define_expand "movdicc"
744 [(set (match_operand:DI 0 "register_operand" "")
746 (match_operand 1 "comparison_operator" "")
747 (match_operand:DI 2 "mmix_reg_or_8bit_operand" "")
748 (match_operand:DI 3 "mmix_reg_or_8bit_operand" "")))]
752 enum rtx_code code = GET_CODE (operands[1]);
753 rtx cc_reg = mmix_gen_compare_reg (code, mmix_compare_op0,
755 if (cc_reg == NULL_RTX)
757 operands[1] = gen_rtx_fmt_ee (code, VOIDmode, cc_reg, const0_rtx);
760 ;; FIXME: Is this the right way to do "folding" of CCmode -> DImode?
761 (define_insn "*movdicc_real_foldable"
762 [(set (match_operand:DI 0 "register_operand" "=r,r,r,r")
764 (match_operator 2 "mmix_foldable_comparison_operator"
765 [(match_operand:DI 3 "register_operand" "r,r,r,r")
767 (match_operand:DI 1 "mmix_reg_or_8bit_operand" "rI,0 ,rI,GM")
768 (match_operand:DI 4 "mmix_reg_or_8bit_operand" "0 ,rI,GM,rI")))]
776 (define_insn "*movdicc_real_reversible"
778 (match_operand:DI 0 "register_operand" "=r ,r ,r ,r")
781 2 "mmix_comparison_operator"
782 [(match_operand 3 "mmix_reg_cc_operand" "r ,r ,r ,r")
784 (match_operand:DI 1 "mmix_reg_or_8bit_operand" "rI,0 ,rI,GM")
785 (match_operand:DI 4 "mmix_reg_or_8bit_operand" "0 ,rI,GM,rI")))]
786 "REVERSIBLE_CC_MODE (GET_MODE (operands[3]))"
793 (define_insn "*movdicc_real_nonreversible"
795 (match_operand:DI 0 "register_operand" "=r ,r")
798 2 "mmix_comparison_operator"
799 [(match_operand 3 "mmix_reg_cc_operand" "r ,r")
801 (match_operand:DI 1 "mmix_reg_or_8bit_operand" "rI,rI")
802 (match_operand:DI 4 "mmix_reg_or_0_operand" "0 ,GM")))]
803 "!REVERSIBLE_CC_MODE (GET_MODE (operands[3]))"
808 (define_insn "*movdfcc_real_foldable"
810 (match_operand:DF 0 "register_operand" "=r ,r ,r ,r")
813 2 "mmix_foldable_comparison_operator"
814 [(match_operand:DI 3 "register_operand" "r ,r ,r ,r")
816 (match_operand:DF 1 "mmix_reg_or_0_operand" "rGM,0 ,rGM,GM")
817 (match_operand:DF 4 "mmix_reg_or_0_operand" "0 ,rGM,GM ,rGM")))]
825 (define_insn "*movdfcc_real_reversible"
827 (match_operand:DF 0 "register_operand" "=r ,r ,r ,r")
830 2 "mmix_comparison_operator"
831 [(match_operand 3 "mmix_reg_cc_operand" "r ,r ,r ,r")
833 (match_operand:DF 1 "mmix_reg_or_0_operand" "rGM,0 ,rGM,GM")
834 (match_operand:DF 4 "mmix_reg_or_0_operand" "0 ,rGM,GM ,rGM")))]
835 "REVERSIBLE_CC_MODE (GET_MODE (operands[3]))"
842 (define_insn "*movdfcc_real_nonreversible"
844 (match_operand:DF 0 "register_operand" "=r ,r")
847 2 "mmix_comparison_operator"
848 [(match_operand 3 "mmix_reg_cc_operand" "r ,r")
850 (match_operand:DF 1 "mmix_reg_or_0_operand" "rGM,rGM")
851 (match_operand:DF 4 "mmix_reg_or_0_operand" "0 ,GM")))]
852 "!REVERSIBLE_CC_MODE (GET_MODE (operands[3]))"
857 ;; FIXME: scc patterns will probably help, I just skip them
858 ;; right now. Revisit.
862 (if_then_else (eq (match_dup 1) (const_int 0))
863 (label_ref (match_operand 0 "" ""))
869 = mmix_gen_compare_reg (EQ, mmix_compare_op0, mmix_compare_op1);
874 (if_then_else (ne (match_dup 1) (const_int 0))
875 (label_ref (match_operand 0 "" ""))
881 = mmix_gen_compare_reg (NE, mmix_compare_op0, mmix_compare_op1);
886 (if_then_else (gt (match_dup 1) (const_int 0))
887 (label_ref (match_operand 0 "" ""))
893 = mmix_gen_compare_reg (GT, mmix_compare_op0, mmix_compare_op1);
898 (if_then_else (le (match_dup 1) (const_int 0))
899 (label_ref (match_operand 0 "" ""))
905 = mmix_gen_compare_reg (LE, mmix_compare_op0, mmix_compare_op1);
907 /* The head comment of optabs.c:can_compare_p says we're required to
908 implement this, so we have to clean up the mess here. */
909 if (operands[1] == NULL_RTX)
911 /* FIXME: Watch out for sharing/unsharing of rtx:es. */
912 emit_jump_insn ((*bcc_gen_fctn[(int) LT]) (operands[0]));
913 emit_jump_insn ((*bcc_gen_fctn[(int) EQ]) (operands[0]));
920 (if_then_else (ge (match_dup 1) (const_int 0))
921 (label_ref (match_operand 0 "" ""))
927 = mmix_gen_compare_reg (GE, mmix_compare_op0, mmix_compare_op1);
929 /* The head comment of optabs.c:can_compare_p says we're required to
930 implement this, so we have to clean up the mess here. */
931 if (operands[1] == NULL_RTX)
933 /* FIXME: Watch out for sharing/unsharing of rtx:es. */
934 emit_jump_insn ((*bcc_gen_fctn[(int) GT]) (operands[0]));
935 emit_jump_insn ((*bcc_gen_fctn[(int) EQ]) (operands[0]));
942 (if_then_else (lt (match_dup 1) (const_int 0))
943 (label_ref (match_operand 0 "" ""))
949 = mmix_gen_compare_reg (LT, mmix_compare_op0, mmix_compare_op1);
952 (define_expand "bgtu"
954 (if_then_else (gtu (match_dup 1) (const_int 0))
955 (label_ref (match_operand 0 "" ""))
961 = mmix_gen_compare_reg (GTU, mmix_compare_op0, mmix_compare_op1);
964 (define_expand "bleu"
966 (if_then_else (leu (match_dup 1) (const_int 0))
967 (label_ref (match_operand 0 "" ""))
973 = mmix_gen_compare_reg (LEU, mmix_compare_op0, mmix_compare_op1);
976 (define_expand "bgeu"
978 (if_then_else (geu (match_dup 1) (const_int 0))
979 (label_ref (match_operand 0 "" ""))
985 = mmix_gen_compare_reg (GEU, mmix_compare_op0, mmix_compare_op1);
988 (define_expand "bltu"
990 (if_then_else (ltu (match_dup 1) (const_int 0))
991 (label_ref (match_operand 0 "" ""))
997 = mmix_gen_compare_reg (LTU, mmix_compare_op0, mmix_compare_op1);
1000 (define_expand "bunordered"
1002 (if_then_else (unordered (match_dup 1) (const_int 0))
1003 (label_ref (match_operand 0 "" ""))
1009 = mmix_gen_compare_reg (UNORDERED, mmix_compare_op0, mmix_compare_op1);
1011 if (operands[1] == NULL_RTX)
1015 (define_expand "bordered"
1017 (if_then_else (ordered (match_dup 1) (const_int 0))
1018 (label_ref (match_operand 0 "" ""))
1024 = mmix_gen_compare_reg (ORDERED, mmix_compare_op0, mmix_compare_op1);
1027 ;; FIXME: we can emit an unordered-or-*not*-equal compare in one insn, but
1028 ;; there's no RTL code for it. Maybe revisit in future.
1030 ;; FIXME: Odd/Even matchers?
1031 (define_insn "*bCC_foldable"
1034 (match_operator 1 "mmix_foldable_comparison_operator"
1035 [(match_operand:DI 2 "register_operand" "r")
1037 (label_ref (match_operand 0 "" ""))
1045 (match_operator 1 "mmix_comparison_operator"
1046 [(match_operand 2 "mmix_reg_cc_operand" "r")
1048 (label_ref (match_operand 0 "" ""))
1053 (define_insn "*bCC_inverted_foldable"
1056 (match_operator 1 "mmix_foldable_comparison_operator"
1057 [(match_operand:DI 2 "register_operand" "r")
1060 (label_ref (match_operand 0 "" ""))))]
1061 ;; REVERSIBLE_CC_MODE is checked by mmix_foldable_comparison_operator.
1065 (define_insn "*bCC_inverted"
1068 (match_operator 1 "mmix_comparison_operator"
1069 [(match_operand 2 "mmix_reg_cc_operand" "r")
1072 (label_ref (match_operand 0 "" ""))))]
1073 "REVERSIBLE_CC_MODE (GET_MODE (operands[2]))"
1076 (define_expand "call"
1077 [(parallel [(call (match_operand:QI 0 "memory_operand" "")
1078 (match_operand 1 "general_operand" ""))
1079 (use (match_operand 2 "general_operand" ""))
1080 (clobber (match_dup 4))])
1081 (set (match_dup 4) (match_dup 3))]
1085 /* The caller checks that the operand is generally valid as an
1086 address, but at -O0 nothing makes sure that it's also a valid
1087 call address for a *call*; a mmix_symbolic_or_address_operand.
1088 Force into a register if it isn't. */
1089 if (!mmix_symbolic_or_address_operand (XEXP (operands[0], 0),
1090 GET_MODE (XEXP (operands[0], 0))))
1092 = replace_equiv_address (operands[0],
1093 force_reg (Pmode, XEXP (operands[0], 0)));
1095 /* Since the epilogue 'uses' the return address, and it is clobbered
1096 in the call, and we set it back after every call (all but one setting
1097 will be optimized away), integrity is maintained. */
1099 = mmix_get_hard_reg_initial_val (Pmode,
1100 MMIX_INCOMING_RETURN_ADDRESS_REGNUM);
1102 /* FIXME: There's a bug in gcc which causes NULL to be passed as
1103 operand[2] when we get out of registers, which later confuses gcc.
1104 Work around it by replacing it with const_int 0. Possibly documentation
1106 if (operands[2] == NULL_RTX)
1107 operands[2] = const0_rtx;
1109 operands[4] = gen_rtx_REG (DImode, MMIX_INCOMING_RETURN_ADDRESS_REGNUM);
1112 (define_expand "call_value"
1113 [(parallel [(set (match_operand 0 "" "")
1114 (call (match_operand:QI 1 "memory_operand" "")
1115 (match_operand 2 "general_operand" "")))
1116 (use (match_operand 3 "general_operand" ""))
1117 (clobber (match_dup 5))])
1118 (set (match_dup 5) (match_dup 4))]
1122 /* The caller checks that the operand is generally valid as an
1123 address, but at -O0 nothing makes sure that it's also a valid
1124 call address for a *call*; a mmix_symbolic_or_address_operand.
1125 Force into a register if it isn't. */
1126 if (!mmix_symbolic_or_address_operand (XEXP (operands[1], 0),
1127 GET_MODE (XEXP (operands[1], 0))))
1129 = replace_equiv_address (operands[1],
1130 force_reg (Pmode, XEXP (operands[1], 0)));
1132 /* Since the epilogue 'uses' the return address, and it is clobbered
1133 in the call, and we set it back after every call (all but one setting
1134 will be optimized away), integrity is maintained. */
1136 = mmix_get_hard_reg_initial_val (Pmode,
1137 MMIX_INCOMING_RETURN_ADDRESS_REGNUM);
1139 /* FIXME: See 'call'. */
1140 if (operands[3] == NULL_RTX)
1141 operands[3] = const0_rtx;
1143 /* FIXME: Documentation bug: operands[3] (operands[2] for 'call') is the
1144 *next* argument register, not the number of arguments in registers.
1145 (There used to be code here where that mattered.) */
1147 operands[5] = gen_rtx_REG (DImode, MMIX_INCOMING_RETURN_ADDRESS_REGNUM);
1150 ;; Don't use 'p' here. A 'p' must stand first in constraints, or reload
1151 ;; messes up, not registering the address for reload. Several C++
1152 ;; testcases, including g++.brendan/crash40.C. FIXME: This is arguably a
1153 ;; bug in gcc. Note line ~2612 in reload.c, that does things on the
1154 ;; condition <<else if (constraints[i][0] == 'p')>> and the comment on
1157 ;; /* All necessary reloads for an address_operand
1158 ;; were handled in find_reloads_address. */>>
1159 ;; Sorry, I have not dug deeper. If symbolic addresses are used
1160 ;; rarely compared to addresses in registers, disparaging the
1161 ;; first ("p") alternative by adding ? in the first operand
1162 ;; might do the trick. We define 'U' as a synonym to 'p', but without the
1163 ;; caveats (and very small advantages) of 'p'.
1164 (define_insn "*call_real"
1166 (match_operand:DI 0 "mmix_symbolic_or_address_operand" "s,rU"))
1167 (match_operand 1 "" ""))
1168 (use (match_operand 2 "" ""))
1169 (clobber (reg:DI MMIX_rJ_REGNUM))]
1175 (define_insn "*call_value_real"
1176 [(set (match_operand 0 "register_operand" "=r,r")
1178 (match_operand:DI 1 "mmix_symbolic_or_address_operand" "s,rU"))
1179 (match_operand 2 "" "")))
1180 (use (match_operand 3 "" ""))
1181 (clobber (reg:DI MMIX_rJ_REGNUM))]
1187 ;; I hope untyped_call and untyped_return are not needed for MMIX.
1188 ;; Users of Objective-C will notice.
1191 (define_expand "return"
1193 "mmix_use_simple_return ()"
1196 ; Generated by the epilogue expander.
1197 (define_insn "*expanded_return"
1202 (define_expand "prologue"
1205 "mmix_expand_prologue (); DONE;")
1207 ; Note that the (return) from the expander itself is always the last insn
1209 (define_expand "epilogue"
1212 "mmix_expand_epilogue ();")
1220 [(set (pc) (label_ref (match_operand 0 "" "")))]
1224 (define_insn "indirect_jump"
1225 [(set (pc) (match_operand 0 "address_operand" "p"))]
1229 ;; FIXME: This is just a jump, and should be expanded to one.
1230 (define_insn "tablejump"
1231 [(set (pc) (match_operand:DI 0 "address_operand" "p"))
1232 (use (label_ref (match_operand 1 "" "")))]
1236 ;; The only peculiar thing is that the register stack has to be unwound at
1237 ;; nonlocal_goto_receiver. At each function that has a nonlocal label, we
1238 ;; save at function entry the location of the "alpha" register stack
1239 ;; pointer, rO, in a stack slot known to that function (right below where
1240 ;; the frame-pointer would be located).
1241 ;; In the nonlocal goto receiver, we unwind the register stack by a series
1242 ;; of "pop 0,0" until rO equals the saved value. (If it goes lower, we
1243 ;; should die with a trap.)
1244 (define_expand "nonlocal_goto_receiver"
1245 [(parallel [(unspec_volatile [(const_int 0)] 1)
1246 (clobber (scratch:DI))
1247 (clobber (reg:DI MMIX_rJ_REGNUM))])
1248 (set (reg:DI MMIX_rJ_REGNUM) (match_dup 0))]
1253 = mmix_get_hard_reg_initial_val (Pmode,
1254 MMIX_INCOMING_RETURN_ADDRESS_REGNUM);
1256 /* Mark this function as containing a landing-pad. */
1257 cfun->machine->has_landing_pad = 1;
1260 ;; GCC can insist on using saved registers to keep the slot address in
1261 ;; "across" the exception, or (perhaps) to use saved registers in the
1262 ;; address and re-use them after the register stack unwind, so it's best
1263 ;; to form the address ourselves.
1264 (define_insn "*nonlocal_goto_receiver_expanded"
1265 [(unspec_volatile [(const_int 0)] 1)
1266 (clobber (match_scratch:DI 0 "=&r"))
1267 (clobber (reg:DI MMIX_rJ_REGNUM))]
1270 rtx temp_reg = operands[0];
1272 HOST_WIDEST_INT offs;
1273 const char *my_template
1274 = "GETA $255,0f\;PUT rJ,$255\;LDOU $255,%a0\n\
1275 0:\;GET %1,rO\;CMPU %1,%1,$255\;BNP %1,1f\;POP 0,0\n1:";
1277 my_operands[1] = temp_reg;
1279 /* If we have a frame-pointer (hence unknown stack-pointer offset),
1280 just use the frame-pointer and the known offset. */
1281 if (frame_pointer_needed)
1283 my_operands[0] = GEN_INT (-MMIX_fp_rO_OFFSET);
1285 output_asm_insn ("NEGU %1,0,%0", my_operands);
1286 my_operands[0] = gen_rtx_PLUS (Pmode, frame_pointer_rtx, temp_reg);
1290 /* We know the fp-based offset, so "eliminate" it to be sp-based. */
1292 = (mmix_initial_elimination_offset (MMIX_FRAME_POINTER_REGNUM,
1293 MMIX_STACK_POINTER_REGNUM)
1294 + MMIX_fp_rO_OFFSET);
1296 if (offs >= 0 && offs <= 255)
1298 = gen_rtx_PLUS (Pmode, stack_pointer_rtx, GEN_INT (offs));
1301 mmix_output_register_setting (asm_out_file, REGNO (temp_reg),
1303 my_operands[0] = gen_rtx_PLUS (Pmode, stack_pointer_rtx, temp_reg);
1307 output_asm_insn (my_template, my_operands);
1311 (define_insn "*Naddu"
1312 [(set (match_operand:DI 0 "register_operand" "=r")
1313 (plus:DI (mult:DI (match_operand:DI 1 "register_operand" "r")
1314 (match_operand:DI 2 "const_int_operand" "n"))
1315 (match_operand:DI 3 "mmix_reg_or_8bit_operand" "rI")))]
1316 "GET_CODE (operands[2]) == CONST_INT
1317 && (INTVAL (operands[2]) == 2
1318 || INTVAL (operands[2]) == 4
1319 || INTVAL (operands[2]) == 8
1320 || INTVAL (operands[2]) == 16)"
1323 (define_insn "*andn"
1324 [(set (match_operand:DI 0 "register_operand" "=r")
1326 (not:DI (match_operand:DI 1 "mmix_reg_or_8bit_operand" "rI"))
1327 (match_operand:DI 2 "register_operand" "r")))]
1331 (define_insn "*nand"
1332 [(set (match_operand:DI 0 "register_operand" "=r")
1334 (not:DI (match_operand:DI 1 "register_operand" "%r"))
1335 (not:DI (match_operand:DI 2 "mmix_reg_or_8bit_operand" "rI"))))]
1340 [(set (match_operand:DI 0 "register_operand" "=r")
1342 (not:DI (match_operand:DI 1 "register_operand" "%r"))
1343 (not:DI (match_operand:DI 2 "mmix_reg_or_8bit_operand" "rI"))))]
1347 (define_insn "*nxor"
1348 [(set (match_operand:DI 0 "register_operand" "=r")
1350 (xor:DI (match_operand:DI 1 "register_operand" "%r")
1351 (match_operand:DI 2 "mmix_reg_or_8bit_operand" "rI"))))]
1355 (define_insn "sync_icache"
1356 [(unspec_volatile [(match_operand:DI 0 "memory_operand" "m")
1357 (match_operand:DI 1 "const_int_operand" "I")] 0)]
1363 ;; indent-tabs-mode: t