2 % (c) The AQUA Project, Glasgow University, 1996-1998
4 \section[RegAllocInfo]{Machine-specific info used for register allocation}
6 The (machine-independent) allocator itself is in @AsmRegAlloc@.
9 #include "nativeGen/NCG.h"
37 #include "HsVersions.h"
42 import Stix ( DestInfo(..) )
43 import CLabel ( isAsmTemp, CLabel{-instance Ord-} )
44 import FiniteMap ( addToFM, lookupFM, FiniteMap )
46 import Constants ( rESERVED_C_STACK_BYTES )
47 import Unique ( Unique, Uniquable(..) )
52 %************************************************************************
54 \subsection{Sets of registers}
56 %************************************************************************
60 -- Blargh. Use ghc stuff soon! Or: perhaps that's not such a good
61 -- idea. Most of these sets are either empty or very small, and it
62 -- might be that the overheads of the FiniteMap based set implementation
63 -- is a net loss. The same might be true of FeSets.
65 newtype RegSet = MkRegSet [Reg]
68 = MkRegSet (nukeDups (sort xs))
69 where nukeDups :: [Reg] -> [Reg]
73 = if x == y then nukeDups (y:xys)
74 else x : nukeDups (y:xys)
76 regSetToList (MkRegSet xs) = xs
77 isEmptyRegSet (MkRegSet xs) = null xs
78 emptyRegSet = MkRegSet []
79 eqRegSets (MkRegSet xs1) (MkRegSet xs2) = xs1 == xs2
80 unitRegSet x = MkRegSet [x]
81 filterRegSet p (MkRegSet xs) = MkRegSet (filter p xs)
83 elemRegSet x (MkRegSet xs)
87 f (y:ys) | x == y = True
91 unionRegSets (MkRegSet xs1) (MkRegSet xs2)
92 = MkRegSet (f xs1 xs2)
97 | a < b = a : f as (b:bs)
98 | a > b = b : f (a:as) bs
99 | otherwise = a : f as bs
101 minusRegSets (MkRegSet xs1) (MkRegSet xs2)
102 = MkRegSet (f xs1 xs2)
107 | a < b = a : f as (b:bs)
108 | a > b = f (a:as) bs
109 | otherwise = f as bs
111 intersectionRegSets (MkRegSet xs1) (MkRegSet xs2)
112 = MkRegSet (f xs1 xs2)
117 | a < b = f as (b:bs)
118 | a > b = f (a:as) bs
119 | otherwise = a : f as bs
122 %************************************************************************
124 \subsection{@RegUsage@ type; @noUsage@, @endUsage@, @regUsage@ functions}
126 %************************************************************************
128 @regUsage@ returns the sets of src and destination registers used by a
129 particular instruction. Machine registers that are pre-allocated to
130 stgRegs are filtered out, because they are uninteresting from a
131 register allocation standpoint. (We wouldn't want them to end up on
132 the free list!) As far as we are concerned, the fixed registers
133 simply don't exist (for allocation purposes, anyway).
135 regUsage doesn't need to do any trickery for jumps and such. Just
136 state precisely the regs read and written by that insn. The
137 consequences of control flow transfers, as far as register allocation
138 goes, are taken care of by @insnFuture@.
141 data RegUsage = RU RegSet RegSet
144 noUsage = RU emptyRegSet emptyRegSet
146 regUsage :: Instr -> RegUsage
148 interesting (VirtualRegI _) = True
149 interesting (VirtualRegF _) = True
150 interesting (VirtualRegD _) = True
151 interesting (RealReg i) = isFastTrue (freeReg i)
153 #if alpha_TARGET_ARCH
155 regUsage instr = case instr of
156 LD B reg addr -> usage (regAddr addr, [reg, t9])
157 LD Bu reg addr -> usage (regAddr addr, [reg, t9])
158 -- LD W reg addr -> usage (regAddr addr, [reg, t9]) : UNUSED
159 -- LD Wu reg addr -> usage (regAddr addr, [reg, t9]) : UNUSED
160 LD sz reg addr -> usage (regAddr addr, [reg])
161 LDA reg addr -> usage (regAddr addr, [reg])
162 LDAH reg addr -> usage (regAddr addr, [reg])
163 LDGP reg addr -> usage (regAddr addr, [reg])
164 LDI sz reg imm -> usage ([], [reg])
165 ST B reg addr -> usage (reg : regAddr addr, [t9, t10])
166 -- ST W reg addr -> usage (reg : regAddr addr, [t9, t10]) : UNUSED
167 ST sz reg addr -> usage (reg : regAddr addr, [])
168 CLR reg -> usage ([], [reg])
169 ABS sz ri reg -> usage (regRI ri, [reg])
170 NEG sz ov ri reg -> usage (regRI ri, [reg])
171 ADD sz ov r1 ar r2 -> usage (r1 : regRI ar, [r2])
172 SADD sz sc r1 ar r2 -> usage (r1 : regRI ar, [r2])
173 SUB sz ov r1 ar r2 -> usage (r1 : regRI ar, [r2])
174 SSUB sz sc r1 ar r2 -> usage (r1 : regRI ar, [r2])
175 MUL sz ov r1 ar r2 -> usage (r1 : regRI ar, [r2])
176 DIV sz un r1 ar r2 -> usage (r1 : regRI ar, [r2, t9, t10, t11, t12])
177 REM sz un r1 ar r2 -> usage (r1 : regRI ar, [r2, t9, t10, t11, t12])
178 NOT ri reg -> usage (regRI ri, [reg])
179 AND r1 ar r2 -> usage (r1 : regRI ar, [r2])
180 ANDNOT r1 ar r2 -> usage (r1 : regRI ar, [r2])
181 OR r1 ar r2 -> usage (r1 : regRI ar, [r2])
182 ORNOT r1 ar r2 -> usage (r1 : regRI ar, [r2])
183 XOR r1 ar r2 -> usage (r1 : regRI ar, [r2])
184 XORNOT r1 ar r2 -> usage (r1 : regRI ar, [r2])
185 SLL r1 ar r2 -> usage (r1 : regRI ar, [r2])
186 SRL r1 ar r2 -> usage (r1 : regRI ar, [r2])
187 SRA r1 ar r2 -> usage (r1 : regRI ar, [r2])
188 ZAP r1 ar r2 -> usage (r1 : regRI ar, [r2])
189 ZAPNOT r1 ar r2 -> usage (r1 : regRI ar, [r2])
190 CMP co r1 ar r2 -> usage (r1 : regRI ar, [r2])
191 FCLR reg -> usage ([], [reg])
192 FABS r1 r2 -> usage ([r1], [r2])
193 FNEG sz r1 r2 -> usage ([r1], [r2])
194 FADD sz r1 r2 r3 -> usage ([r1, r2], [r3])
195 FDIV sz r1 r2 r3 -> usage ([r1, r2], [r3])
196 FMUL sz r1 r2 r3 -> usage ([r1, r2], [r3])
197 FSUB sz r1 r2 r3 -> usage ([r1, r2], [r3])
198 CVTxy sz1 sz2 r1 r2 -> usage ([r1], [r2])
199 FCMP sz co r1 r2 r3 -> usage ([r1, r2], [r3])
200 FMOV r1 r2 -> usage ([r1], [r2])
203 -- We assume that all local jumps will be BI/BF/BR. JMP must be out-of-line.
204 BI cond reg lbl -> usage ([reg], [])
205 BF cond reg lbl -> usage ([reg], [])
206 JMP reg addr hint -> RU (mkRegSet (filter interesting (regAddr addr))) freeRegSet
208 BSR _ n -> RU (argRegSet n) callClobberedRegSet
209 JSR reg addr n -> RU (argRegSet n) callClobberedRegSet
214 usage (src, dst) = RU (mkRegSet (filter interesting src))
215 (mkRegSet (filter interesting dst))
217 interesting (FixedReg _) = False
220 regAddr (AddrReg r1) = [r1]
221 regAddr (AddrRegImm r1 _) = [r1]
222 regAddr (AddrImm _) = []
224 regRI (RIReg r) = [r]
227 #endif {- alpha_TARGET_ARCH -}
228 -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
231 regUsage instr = case instr of
232 MOV sz src dst -> usageRW src dst
233 MOVZxL sz src dst -> usageRW src dst
234 MOVSxL sz src dst -> usageRW src dst
235 LEA sz src dst -> usageRW src dst
236 ADD sz src dst -> usageRM src dst
237 SUB sz src dst -> usageRM src dst
238 IMUL sz src dst -> usageRM src dst
239 IMUL64 sd1 sd2 -> mkRU [sd1,sd2] [sd1,sd2]
240 MUL sz src dst -> usageRM src dst
241 IQUOT sz src dst -> usageRM src dst
242 IREM sz src dst -> usageRM src dst
243 QUOT sz src dst -> usageRM src dst
244 REM sz src dst -> usageRM src dst
245 AND sz src dst -> usageRM src dst
246 OR sz src dst -> usageRM src dst
247 XOR sz src dst -> usageRM src dst
248 NOT sz op -> usageM op
249 NEGI sz op -> usageM op
250 SHL sz imm dst -> usageM dst
251 SAR sz imm dst -> usageM dst
252 SHR sz imm dst -> usageM dst
253 BT sz imm src -> mkRU (use_R src) []
255 PUSH sz op -> mkRU (use_R op) []
256 POP sz op -> mkRU [] (def_W op)
257 TEST sz src dst -> mkRU (use_R src ++ use_R dst) []
258 CMP sz src dst -> mkRU (use_R src ++ use_R dst) []
259 SETCC cond op -> mkRU [] (def_W op)
260 JXX cond lbl -> mkRU [] []
261 JMP dsts op -> mkRU (use_R op) []
262 CALL (Left imm) -> mkRU [] callClobberedRegs
263 CALL (Right reg) -> mkRU [reg] callClobberedRegs
264 CLTD -> mkRU [eax] [edx]
267 GMOV src dst -> mkRU [src] [dst]
268 GLD sz src dst -> mkRU (use_EA src) [dst]
269 GST sz src dst -> mkRU (src : use_EA dst) []
271 GLDZ dst -> mkRU [] [dst]
272 GLD1 dst -> mkRU [] [dst]
274 GFTOI src dst -> mkRU [src] [dst]
275 GDTOI src dst -> mkRU [src] [dst]
277 GITOF src dst -> mkRU [src] [dst]
278 GITOD src dst -> mkRU [src] [dst]
280 GADD sz s1 s2 dst -> mkRU [s1,s2] [dst]
281 GSUB sz s1 s2 dst -> mkRU [s1,s2] [dst]
282 GMUL sz s1 s2 dst -> mkRU [s1,s2] [dst]
283 GDIV sz s1 s2 dst -> mkRU [s1,s2] [dst]
285 GCMP sz src1 src2 -> mkRU [src1,src2] []
286 GABS sz src dst -> mkRU [src] [dst]
287 GNEG sz src dst -> mkRU [src] [dst]
288 GSQRT sz src dst -> mkRU [src] [dst]
289 GSIN sz src dst -> mkRU [src] [dst]
290 GCOS sz src dst -> mkRU [src] [dst]
291 GTAN sz src dst -> mkRU [src] [dst]
299 _ -> pprPanic "regUsage(x86)" empty
302 -- 2 operand form; first operand Read; second Written
303 usageRW :: Operand -> Operand -> RegUsage
304 usageRW op (OpReg reg) = mkRU (use_R op) [reg]
305 usageRW op (OpAddr ea) = mkRU (use_R op ++ use_EA ea) []
307 -- 2 operand form; first operand Read; second Modified
308 usageRM :: Operand -> Operand -> RegUsage
309 usageRM op (OpReg reg) = mkRU (use_R op ++ [reg]) [reg]
310 usageRM op (OpAddr ea) = mkRU (use_R op ++ use_EA ea) []
312 -- 1 operand form; operand Modified
313 usageM :: Operand -> RegUsage
314 usageM (OpReg reg) = mkRU [reg] [reg]
315 usageM (OpAddr ea) = mkRU (use_EA ea) []
317 -- Registers defd when an operand is written.
318 def_W (OpReg reg) = [reg]
319 def_W (OpAddr ea) = []
321 -- Registers used when an operand is read.
322 use_R (OpReg reg) = [reg]
323 use_R (OpImm imm) = []
324 use_R (OpAddr ea) = use_EA ea
326 -- Registers used to compute an effective address.
327 use_EA (ImmAddr _ _) = []
328 use_EA (AddrBaseIndex Nothing Nothing _) = []
329 use_EA (AddrBaseIndex (Just b) Nothing _) = [b]
330 use_EA (AddrBaseIndex Nothing (Just (i,_)) _) = [i]
331 use_EA (AddrBaseIndex (Just b) (Just (i,_)) _) = [b,i]
333 mkRU src dst = RU (regSetFromList (filter interesting src))
334 (regSetFromList (filter interesting dst))
336 #endif {- i386_TARGET_ARCH -}
337 -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
338 #if sparc_TARGET_ARCH
340 regUsage instr = case instr of
341 LD sz addr reg -> usage (regAddr addr, [reg])
342 ST sz reg addr -> usage (reg : regAddr addr, [])
343 ADD x cc r1 ar r2 -> usage (r1 : regRI ar, [r2])
344 SUB x cc r1 ar r2 -> usage (r1 : regRI ar, [r2])
345 UMUL cc r1 ar r2 -> usage (r1 : regRI ar, [r2])
346 SMUL cc r1 ar r2 -> usage (r1 : regRI ar, [r2])
347 RDY rd -> usage ([], [rd])
348 AND b r1 ar r2 -> usage (r1 : regRI ar, [r2])
349 ANDN b r1 ar r2 -> usage (r1 : regRI ar, [r2])
350 OR b r1 ar r2 -> usage (r1 : regRI ar, [r2])
351 ORN b r1 ar r2 -> usage (r1 : regRI ar, [r2])
352 XOR b r1 ar r2 -> usage (r1 : regRI ar, [r2])
353 XNOR b r1 ar r2 -> usage (r1 : regRI ar, [r2])
354 SLL r1 ar r2 -> usage (r1 : regRI ar, [r2])
355 SRL r1 ar r2 -> usage (r1 : regRI ar, [r2])
356 SRA r1 ar r2 -> usage (r1 : regRI ar, [r2])
357 SETHI imm reg -> usage ([], [reg])
358 FABS s r1 r2 -> usage ([r1], [r2])
359 FADD s r1 r2 r3 -> usage ([r1, r2], [r3])
360 FCMP e s r1 r2 -> usage ([r1, r2], [])
361 FDIV s r1 r2 r3 -> usage ([r1, r2], [r3])
362 FMOV s r1 r2 -> usage ([r1], [r2])
363 FMUL s r1 r2 r3 -> usage ([r1, r2], [r3])
364 FNEG s r1 r2 -> usage ([r1], [r2])
365 FSQRT s r1 r2 -> usage ([r1], [r2])
366 FSUB s r1 r2 r3 -> usage ([r1, r2], [r3])
367 FxTOy s1 s2 r1 r2 -> usage ([r1], [r2])
369 -- We assume that all local jumps will be BI/BF. JMP must be out-of-line.
370 JMP dst addr -> usage (regAddr addr, [])
372 CALL _ n True -> noUsage
373 CALL _ n False -> usage (argRegs n, callClobberedRegs)
377 usage (src, dst) = RU (regSetFromList (filter interesting src))
378 (regSetFromList (filter interesting dst))
380 regAddr (AddrRegReg r1 r2) = [r1, r2]
381 regAddr (AddrRegImm r1 _) = [r1]
383 regRI (RIReg r) = [r]
386 #endif {- sparc_TARGET_ARCH -}
390 %************************************************************************
392 \subsection{Free, reserved, call-clobbered, and argument registers}
394 %************************************************************************
396 @freeRegs@ is the list of registers we can use in register allocation.
397 @freeReg@ (below) says if a particular register is free.
399 With a per-instruction clobber list, we might be able to get some of
400 these back, but it's probably not worth the hassle.
402 @callClobberedRegs@ ... the obvious.
404 @argRegs@: assuming a call with N arguments, what registers will be
405 used to hold arguments? (NB: it doesn't know whether the arguments
406 are integer or floating-point...)
408 findReservedRegs tells us which regs can be used as spill temporaries.
409 The list of instructions for which we are attempting allocation is
410 supplied. This is so that we can (at least for x86) examine it to
411 discover which registers are being used in a fixed way -- for example,
412 %eax and %edx are used by integer division, so they can't be used as
413 spill temporaries. However, most instruction lists don't do integer
414 division, so we don't want to rule them out altogether.
416 findReservedRegs returns not a list of spill temporaries, but a list
417 of list of them. This is so that the allocator can attempt allocating
418 with at first no spill temps, then if that fails, increasing numbers.
419 For x86 it is important that we minimise the number of regs reserved
420 as spill temporaries, since there are so few. For Alpha and Sparc
421 this isn't a concern; we just ignore the supplied code list and return
422 a singleton list which we know will satisfy all spill demands.
425 findReservedRegs :: [Instr] -> [[Reg]]
426 findReservedRegs instrs
427 #if alpha_TARGET_ARCH
428 = --[[NCG_Reserved_I1, NCG_Reserved_I2,
429 -- NCG_Reserved_F1, NCG_Reserved_F2]]
430 error "findReservedRegs: alpha"
432 #if sparc_TARGET_ARCH
433 = [[NCG_SpillTmp_I1, NCG_SpillTmp_I2,
434 NCG_SpillTmp_D1, NCG_SpillTmp_D2,
435 NCG_SpillTmp_F1, NCG_SpillTmp_F2]]
438 -- We can use %fake4 and %fake5 safely for float temps.
439 -- Int regs are more troublesome. Only %ecx and %edx are
440 -- definitely. At a pinch, we also could bag %eax if there
441 -- are no ccalls, but so far we've never encountered
442 -- a situation where three integer temporaries are necessary.
444 -- Because registers are in short supply on x86, we give the
445 -- allocator a whole bunch of possibilities, starting with zero
446 -- temporaries and working up to all that are available. This
447 -- is inefficient, but spills are pretty rare, so we don't care
448 -- if the register allocator has to try half a dozen or so possibilities
449 -- before getting to one that works.
455 = case intregs_avail of
456 [i1] -> [ [], [i1], [f1], [i1,f1], [f1,f2],
459 [i1,i2] -> [ [], [i1], [f1], [i1,i2], [i1,f1], [f1,f2],
460 [i1,i2,f1], [i1,f1,f2], [i1,i2,f1,f2] ]
466 %************************************************************************
468 \subsection{@InsnFuture@ type; @insnFuture@ function}
470 %************************************************************************
472 @insnFuture@ indicates the places we could get to following the
473 current instruction. This is used by the register allocator to
474 compute the flow edges between instructions.
478 = NoFuture -- makes a non-local jump; for the purposes of
479 -- register allocation, it exits our domain
480 | Next -- falls through to next insn
481 | Branch CLabel -- unconditional branch to the label
482 | NextOrBranch CLabel -- conditional branch to the label
483 | MultiFuture [CLabel] -- multiple specific futures
485 --instance Outputable InsnFuture where
486 -- ppr NoFuture = text "NoFuture"
487 -- ppr Next = text "Next"
488 -- ppr (Branch clbl) = text "(Branch " <> ppr clbl <> char ')'
489 -- ppr (NextOrBranch clbl) = text "(NextOrBranch " <> ppr clbl <> char ')'
495 #if alpha_TARGET_ARCH
497 -- We assume that all local jumps will be BI/BF. JMP must be out-of-line.
499 BR (ImmCLbl lbl) -> RL (lookup lbl) future
500 BI _ _ (ImmCLbl lbl) -> RL (lookup lbl `unionRegSets` live) future
501 BF _ _ (ImmCLbl lbl) -> RL (lookup lbl `unionRegSets` live) future
502 JMP _ _ _ -> RL emptyRegSet future
503 BSR _ _ -> RL live future
504 JSR _ _ _ -> RL live future
505 LABEL lbl -> RL live (FL (all `unionRegSets` live) (addToFM env lbl live))
508 #endif {- alpha_TARGET_ARCH -}
509 -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
513 JXX _ clbl | isAsmTemp clbl -> NextOrBranch clbl
514 JXX _ _ -> panic "insnFuture: conditional jump to non-local label"
516 -- If the insn says what its dests are, use em!
517 JMP (DestInfo dsts) _ -> MultiFuture dsts
519 -- unconditional jump to local label
520 JMP NoDestInfo (OpImm (ImmCLbl clbl)) | isAsmTemp clbl -> Branch clbl
522 -- unconditional jump to non-local label
523 JMP NoDestInfo lbl -> NoFuture
526 JMP _ _ -> panic "insnFuture(x86): JMP wierdness"
530 #endif {- i386_TARGET_ARCH -}
531 -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
532 #if sparc_TARGET_ARCH
534 -- We assume that all local jumps will be BI/BF.
535 BI ALWAYS _ (ImmCLbl clbl) -> Branch clbl
536 BI other _ (ImmCLbl clbl) -> NextOrBranch clbl
537 BI other _ _ -> panic "nativeGen(sparc):insnFuture(BI)"
539 BF ALWAYS _ (ImmCLbl clbl) -> Branch clbl
540 BF other _ (ImmCLbl clbl) -> NextOrBranch clbl
541 BF other _ _ -> panic "nativeGen(sparc):insnFuture(BF)"
543 -- CALL(terminal) must be out-of-line. JMP is not out-of-line
544 -- iff it specifies its destinations.
545 JMP NoDestInfo _ -> NoFuture -- n.b. NoFuture == MultiFuture []
546 JMP (DestInfo dsts) _ -> MultiFuture dsts
548 CALL _ _ True -> NoFuture
552 #endif {- sparc_TARGET_ARCH -}
555 %************************************************************************
557 \subsection{@patchRegs@ function}
559 %************************************************************************
561 @patchRegs@ takes an instruction (possibly with
562 MemoryReg/UnmappedReg registers) and changes all register references
563 according to the supplied environment.
566 patchRegs :: Instr -> (Reg -> Reg) -> Instr
568 #if alpha_TARGET_ARCH
570 patchRegs instr env = case instr of
571 LD sz reg addr -> LD sz (env reg) (fixAddr addr)
572 LDA reg addr -> LDA (env reg) (fixAddr addr)
573 LDAH reg addr -> LDAH (env reg) (fixAddr addr)
574 LDGP reg addr -> LDGP (env reg) (fixAddr addr)
575 LDI sz reg imm -> LDI sz (env reg) imm
576 ST sz reg addr -> ST sz (env reg) (fixAddr addr)
577 CLR reg -> CLR (env reg)
578 ABS sz ar reg -> ABS sz (fixRI ar) (env reg)
579 NEG sz ov ar reg -> NEG sz ov (fixRI ar) (env reg)
580 ADD sz ov r1 ar r2 -> ADD sz ov (env r1) (fixRI ar) (env r2)
581 SADD sz sc r1 ar r2 -> SADD sz sc (env r1) (fixRI ar) (env r2)
582 SUB sz ov r1 ar r2 -> SUB sz ov (env r1) (fixRI ar) (env r2)
583 SSUB sz sc r1 ar r2 -> SSUB sz sc (env r1) (fixRI ar) (env r2)
584 MUL sz ov r1 ar r2 -> MUL sz ov (env r1) (fixRI ar) (env r2)
585 DIV sz un r1 ar r2 -> DIV sz un (env r1) (fixRI ar) (env r2)
586 REM sz un r1 ar r2 -> REM sz un (env r1) (fixRI ar) (env r2)
587 NOT ar reg -> NOT (fixRI ar) (env reg)
588 AND r1 ar r2 -> AND (env r1) (fixRI ar) (env r2)
589 ANDNOT r1 ar r2 -> ANDNOT (env r1) (fixRI ar) (env r2)
590 OR r1 ar r2 -> OR (env r1) (fixRI ar) (env r2)
591 ORNOT r1 ar r2 -> ORNOT (env r1) (fixRI ar) (env r2)
592 XOR r1 ar r2 -> XOR (env r1) (fixRI ar) (env r2)
593 XORNOT r1 ar r2 -> XORNOT (env r1) (fixRI ar) (env r2)
594 SLL r1 ar r2 -> SLL (env r1) (fixRI ar) (env r2)
595 SRL r1 ar r2 -> SRL (env r1) (fixRI ar) (env r2)
596 SRA r1 ar r2 -> SRA (env r1) (fixRI ar) (env r2)
597 ZAP r1 ar r2 -> ZAP (env r1) (fixRI ar) (env r2)
598 ZAPNOT r1 ar r2 -> ZAPNOT (env r1) (fixRI ar) (env r2)
599 CMP co r1 ar r2 -> CMP co (env r1) (fixRI ar) (env r2)
600 FCLR reg -> FCLR (env reg)
601 FABS r1 r2 -> FABS (env r1) (env r2)
602 FNEG s r1 r2 -> FNEG s (env r1) (env r2)
603 FADD s r1 r2 r3 -> FADD s (env r1) (env r2) (env r3)
604 FDIV s r1 r2 r3 -> FDIV s (env r1) (env r2) (env r3)
605 FMUL s r1 r2 r3 -> FMUL s (env r1) (env r2) (env r3)
606 FSUB s r1 r2 r3 -> FSUB s (env r1) (env r2) (env r3)
607 CVTxy s1 s2 r1 r2 -> CVTxy s1 s2 (env r1) (env r2)
608 FCMP s co r1 r2 r3 -> FCMP s co (env r1) (env r2) (env r3)
609 FMOV r1 r2 -> FMOV (env r1) (env r2)
610 BI cond reg lbl -> BI cond (env reg) lbl
611 BF cond reg lbl -> BF cond (env reg) lbl
612 JMP reg addr hint -> JMP (env reg) (fixAddr addr) hint
613 JSR reg addr i -> JSR (env reg) (fixAddr addr) i
616 fixAddr (AddrReg r1) = AddrReg (env r1)
617 fixAddr (AddrRegImm r1 i) = AddrRegImm (env r1) i
618 fixAddr other = other
620 fixRI (RIReg r) = RIReg (env r)
623 #endif {- alpha_TARGET_ARCH -}
624 -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
627 patchRegs instr env = case instr of
628 MOV sz src dst -> patch2 (MOV sz) src dst
629 MOVZxL sz src dst -> patch2 (MOVZxL sz) src dst
630 MOVSxL sz src dst -> patch2 (MOVSxL sz) src dst
631 LEA sz src dst -> patch2 (LEA sz) src dst
632 ADD sz src dst -> patch2 (ADD sz) src dst
633 SUB sz src dst -> patch2 (SUB sz) src dst
634 IMUL sz src dst -> patch2 (IMUL sz) src dst
635 IMUL64 sd1 sd2 -> IMUL64 (env sd1) (env sd2)
636 MUL sz src dst -> patch2 (MUL sz) src dst
637 IQUOT sz src dst -> patch2 (IQUOT sz) src dst
638 IREM sz src dst -> patch2 (IREM sz) src dst
639 QUOT sz src dst -> patch2 (QUOT sz) src dst
640 REM sz src dst -> patch2 (REM sz) src dst
641 AND sz src dst -> patch2 (AND sz) src dst
642 OR sz src dst -> patch2 (OR sz) src dst
643 XOR sz src dst -> patch2 (XOR sz) src dst
644 NOT sz op -> patch1 (NOT sz) op
645 NEGI sz op -> patch1 (NEGI sz) op
646 SHL sz imm dst -> patch1 (SHL sz imm) dst
647 SAR sz imm dst -> patch1 (SAR sz imm) dst
648 SHR sz imm dst -> patch1 (SHR sz imm) dst
649 BT sz imm src -> patch1 (BT sz imm) src
650 TEST sz src dst -> patch2 (TEST sz) src dst
651 CMP sz src dst -> patch2 (CMP sz) src dst
652 PUSH sz op -> patch1 (PUSH sz) op
653 POP sz op -> patch1 (POP sz) op
654 SETCC cond op -> patch1 (SETCC cond) op
655 JMP dsts op -> patch1 (JMP dsts) op
657 GMOV src dst -> GMOV (env src) (env dst)
658 GLD sz src dst -> GLD sz (lookupAddr src) (env dst)
659 GST sz src dst -> GST sz (env src) (lookupAddr dst)
661 GLDZ dst -> GLDZ (env dst)
662 GLD1 dst -> GLD1 (env dst)
664 GFTOI src dst -> GFTOI (env src) (env dst)
665 GDTOI src dst -> GDTOI (env src) (env dst)
667 GITOF src dst -> GITOF (env src) (env dst)
668 GITOD src dst -> GITOD (env src) (env dst)
670 GADD sz s1 s2 dst -> GADD sz (env s1) (env s2) (env dst)
671 GSUB sz s1 s2 dst -> GSUB sz (env s1) (env s2) (env dst)
672 GMUL sz s1 s2 dst -> GMUL sz (env s1) (env s2) (env dst)
673 GDIV sz s1 s2 dst -> GDIV sz (env s1) (env s2) (env dst)
675 GCMP sz src1 src2 -> GCMP sz (env src1) (env src2)
676 GABS sz src dst -> GABS sz (env src) (env dst)
677 GNEG sz src dst -> GNEG sz (env src) (env dst)
678 GSQRT sz src dst -> GSQRT sz (env src) (env dst)
679 GSIN sz src dst -> GSIN sz (env src) (env dst)
680 GCOS sz src dst -> GCOS sz (env src) (env dst)
681 GTAN sz src dst -> GTAN sz (env src) (env dst)
683 CALL (Left imm) -> instr
684 CALL (Right reg) -> CALL (Right (env reg))
694 _ -> pprPanic "patchRegs(x86)" empty
697 patch1 insn op = insn (patchOp op)
698 patch2 insn src dst = insn (patchOp src) (patchOp dst)
700 patchOp (OpReg reg) = OpReg (env reg)
701 patchOp (OpImm imm) = OpImm imm
702 patchOp (OpAddr ea) = OpAddr (lookupAddr ea)
704 lookupAddr (ImmAddr imm off) = ImmAddr imm off
705 lookupAddr (AddrBaseIndex base index disp)
706 = AddrBaseIndex (lookupBase base) (lookupIndex index) disp
708 lookupBase Nothing = Nothing
709 lookupBase (Just r) = Just (env r)
711 lookupIndex Nothing = Nothing
712 lookupIndex (Just (r,i)) = Just (env r, i)
714 #endif {- i386_TARGET_ARCH -}
715 -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
716 #if sparc_TARGET_ARCH
718 patchRegs instr env = case instr of
719 LD sz addr reg -> LD sz (fixAddr addr) (env reg)
720 ST sz reg addr -> ST sz (env reg) (fixAddr addr)
721 ADD x cc r1 ar r2 -> ADD x cc (env r1) (fixRI ar) (env r2)
722 SUB x cc r1 ar r2 -> SUB x cc (env r1) (fixRI ar) (env r2)
723 UMUL cc r1 ar r2 -> UMUL cc (env r1) (fixRI ar) (env r2)
724 SMUL cc r1 ar r2 -> SMUL cc (env r1) (fixRI ar) (env r2)
725 RDY rd -> RDY (env rd)
726 AND b r1 ar r2 -> AND b (env r1) (fixRI ar) (env r2)
727 ANDN b r1 ar r2 -> ANDN b (env r1) (fixRI ar) (env r2)
728 OR b r1 ar r2 -> OR b (env r1) (fixRI ar) (env r2)
729 ORN b r1 ar r2 -> ORN b (env r1) (fixRI ar) (env r2)
730 XOR b r1 ar r2 -> XOR b (env r1) (fixRI ar) (env r2)
731 XNOR b r1 ar r2 -> XNOR b (env r1) (fixRI ar) (env r2)
732 SLL r1 ar r2 -> SLL (env r1) (fixRI ar) (env r2)
733 SRL r1 ar r2 -> SRL (env r1) (fixRI ar) (env r2)
734 SRA r1 ar r2 -> SRA (env r1) (fixRI ar) (env r2)
735 SETHI imm reg -> SETHI imm (env reg)
736 FABS s r1 r2 -> FABS s (env r1) (env r2)
737 FADD s r1 r2 r3 -> FADD s (env r1) (env r2) (env r3)
738 FCMP e s r1 r2 -> FCMP e s (env r1) (env r2)
739 FDIV s r1 r2 r3 -> FDIV s (env r1) (env r2) (env r3)
740 FMOV s r1 r2 -> FMOV s (env r1) (env r2)
741 FMUL s r1 r2 r3 -> FMUL s (env r1) (env r2) (env r3)
742 FNEG s r1 r2 -> FNEG s (env r1) (env r2)
743 FSQRT s r1 r2 -> FSQRT s (env r1) (env r2)
744 FSUB s r1 r2 r3 -> FSUB s (env r1) (env r2) (env r3)
745 FxTOy s1 s2 r1 r2 -> FxTOy s1 s2 (env r1) (env r2)
746 JMP dsts addr -> JMP dsts (fixAddr addr)
749 fixAddr (AddrRegReg r1 r2) = AddrRegReg (env r1) (env r2)
750 fixAddr (AddrRegImm r1 i) = AddrRegImm (env r1) i
752 fixRI (RIReg r) = RIReg (env r)
755 #endif {- sparc_TARGET_ARCH -}
758 %************************************************************************
760 \subsection{@spillReg@ and @loadReg@ functions}
762 %************************************************************************
764 Spill to memory, and load it back...
766 JRS, 000122: on x86, don't spill directly above the stack pointer,
767 since some insn sequences (int <-> conversions) use this as a temp
768 location. Leave 8 words (ie, 64 bytes for a 64-bit arch) of slop.
772 spillSlotSize = IF_ARCH_alpha( 8, IF_ARCH_sparc( 8, IF_ARCH_i386( 12, )))
775 maxSpillSlots = ((rESERVED_C_STACK_BYTES - 64) `div` spillSlotSize) - 1
777 -- convert a spill slot number to a *byte* offset, with no sign:
778 -- decide on a per arch basis whether you are spilling above or below
779 -- the C stack pointer.
780 spillSlotToOffset :: Int -> Int
781 spillSlotToOffset slot
782 | slot >= 0 && slot < maxSpillSlots
783 = 64 + spillSlotSize * slot
785 = pprPanic "spillSlotToOffset:"
786 (text "invalid spill location: " <> int slot)
788 vregToSpillSlot :: FiniteMap VRegUnique Int -> VRegUnique -> Int
789 vregToSpillSlot vreg_to_slot_map u
790 = case lookupFM vreg_to_slot_map u of
792 Nothing -> pprPanic "vregToSpillSlot: unmapped vreg" (pprVRegUnique u)
795 spillReg, loadReg :: FiniteMap VRegUnique Int -> Int -> Reg -> Reg -> Instr
797 spillReg vreg_to_slot_map delta dyn vreg
799 = let slot_no = vregToSpillSlot vreg_to_slot_map (getVRegUnique vreg)
800 off = spillSlotToOffset slot_no
802 {-Alpha: spill below the stack pointer (?)-}
803 IF_ARCH_alpha( ST sz dyn (spRel (- (off `div` 8)))
805 {-I386: spill above stack pointer leaving 3 words/spill-}
806 ,IF_ARCH_i386 ( let off_w = (off-delta) `div` 4
807 in case regClass vreg of
808 RcInteger -> MOV L (OpReg dyn) (OpAddr (spRel off_w))
809 _ -> GST F80 dyn (spRel off_w) -- RcFloat/RcDouble
811 {-SPARC: spill below frame pointer leaving 2 words/spill-}
813 let off_w = 1 + (off `div` 4)
814 sz = case regClass vreg of
818 in ST sz dyn (fpRel (- off_w))
822 loadReg vreg_to_slot_map delta vreg dyn
824 = let slot_no = vregToSpillSlot vreg_to_slot_map (getVRegUnique vreg)
825 off = spillSlotToOffset slot_no
827 IF_ARCH_alpha( LD sz dyn (spRel (- (off `div` 8)))
829 ,IF_ARCH_i386 ( let off_w = (off-delta) `div` 4
830 in case regClass vreg of
831 RcInteger -> MOV L (OpAddr (spRel off_w)) (OpReg dyn)
832 _ -> GLD F80 (spRel off_w) dyn -- RcFloat/RcDouble
835 let off_w = 1 + (off `div` 4)
836 sz = case regClass vreg of
840 in LD sz (fpRel (- off_w)) dyn