root/includes/stg/Regs.h

Revision dc179f54d895dc560be857a89c991bd11cac100f, 19.3 KB (checked in by Simon Marlow <marlowsd@…>, 5 months ago)

Give the correct type to CCCS

Needed by #5357
  • Property mode set to 100644
Line 
1/* -----------------------------------------------------------------------------
2 *
3 * (c) The GHC Team, 1998-2009
4 *
5 * Registers in the STG machine.
6 *
7 * Do not #include this file directly: #include "Rts.h" instead.
8 *
9 * To understand the structure of the RTS headers, see the wiki:
10 *   http://hackage.haskell.org/trac/ghc/wiki/Commentary/SourceTree/Includes
11 *
12 * ---------------------------------------------------------------------------*/
13
14#ifndef REGS_H
15#define REGS_H
16
17/*
18 * The STG machine has a collection of "registers", each one of which
19 * may or may not correspond to an actual machine register when
20 * running code. 
21 *
22 * The register set is backed by a table in memory (struct
23 * StgRegTable).  If a particular STG register is not mapped to a
24 * machine register, then the apprpriate slot in this table is used
25 * instead. 
26 *
27 * This table is itself pointed to by another register, BaseReg.  If
28 * BaseReg is not in a machine register, then the register table is
29 * used from an absolute location (MainCapability).
30 *
31 */
32
33typedef struct {
34  StgWord        stgEagerBlackholeInfo;
35  StgFunPtr      stgGCEnter1;
36  StgFunPtr      stgGCFun;
37} StgFunTable;
38
39/*
40 * Vanilla registers are given this union type, which is purely so
41 * that we can cast the vanilla reg to a variety of types with the
42 * minimum of syntax.  eg.  R1.w instead of (StgWord)R1.
43 */
44typedef union {
45    StgWord        w;
46    StgAddr        a;
47    StgChar        c;
48    StgFloat       f;
49    StgInt         i;
50    StgPtr         p;
51} StgUnion;
52
53/*
54 * This is the table that holds shadow-locations for all the STG
55 * registers.  The shadow locations are used when:
56 *
57 *     1) the particular register isn't mapped to a real machine
58 *        register, probably because there's a shortage of real registers.
59 *     2) caller-saves registers are saved across a CCall
60 */
61typedef struct StgRegTable_ {
62  StgUnion        rR1;
63  StgUnion        rR2;
64  StgUnion        rR3;
65  StgUnion        rR4;
66  StgUnion        rR5;
67  StgUnion        rR6;
68  StgUnion        rR7;
69  StgUnion        rR8;
70  StgUnion        rR9;          /* used occasionally by heap/stack checks */
71  StgUnion        rR10;         /* used occasionally by heap/stack checks */
72  StgFloat        rF1;
73  StgFloat        rF2;
74  StgFloat        rF3;
75  StgFloat        rF4;
76  StgDouble       rD1;
77  StgDouble       rD2;
78  StgWord64       rL1;
79  StgPtr          rSp;
80  StgPtr          rSpLim;
81  StgPtr          rHp;
82  StgPtr          rHpLim;
83  struct CostCentreStack_ * rCCCS;  // current cost-centre-stack
84  struct StgTSO_ *     rCurrentTSO;
85  struct nursery_ *    rNursery;
86  struct bdescr_ *     rCurrentNursery; /* Hp/HpLim point into this block */
87  struct bdescr_ *     rCurrentAlloc;   /* for allocation using allocate() */
88  StgWord         rHpAlloc;     /* number of *bytes* being allocated in heap */
89  StgWord         rRet;  // holds the return code of the thread
90} StgRegTable;
91
92#if IN_STG_CODE
93
94/*
95 * Registers Hp and HpLim are global across the entire system, and are
96 * copied into the RegTable before executing a thread.
97 *
98 * Registers Sp and SpLim are saved in the TSO for the
99 * thread, but are copied into the RegTable before executing a thread.
100 *
101 * All other registers are "general purpose", and are used for passing
102 * arguments to functions, and returning values.  The code generator
103 * knows how many of these are in real registers, and avoids
104 * generating code that uses non-real registers.  General purpose
105 * registers are never saved when returning to the scheduler, instead
106 * we save whatever is live at the time on the stack, and restore it
107 * later.  This should reduce the context switch time, amongst other
108 * things.
109 *
110 * For argument passing, the stack will be used in preference to
111 * pseudo-registers if the architecture has too few general purpose
112 * registers.
113 *
114 * Some special RTS functions like newArray and the Integer primitives
115 * expect their arguments to be in registers R1-Rn, so we use these
116 * (pseudo-)registers in those cases.
117 */
118
119/*
120 * Locations for saving per-thread registers.
121 */
122
123#define SAVE_Sp             (CurrentTSO->sp)
124#define SAVE_SpLim          (CurrentTSO->splim)
125
126#define SAVE_Hp             (BaseReg->rHp)
127
128#define SAVE_CurrentTSO     (BaseReg->rCurrentTSO)
129#define SAVE_CurrentNursery (BaseReg->rCurrentNursery)
130#define SAVE_HpAlloc        (BaseReg->rHpAlloc)
131
132/* We sometimes need to save registers across a C-call, eg. if they
133 * are clobbered in the standard calling convention.  We define the
134 * save locations for all registers in the register table.
135 */
136
137#define SAVE_R1             (BaseReg->rR1)
138#define SAVE_R2             (BaseReg->rR2)
139#define SAVE_R3             (BaseReg->rR3)
140#define SAVE_R4             (BaseReg->rR4)
141#define SAVE_R5             (BaseReg->rR5)
142#define SAVE_R6             (BaseReg->rR6)
143#define SAVE_R7             (BaseReg->rR7)
144#define SAVE_R8             (BaseReg->rR8)
145#define SAVE_R9             (BaseReg->rR9)
146#define SAVE_R10            (BaseReg->rR10)
147 
148#define SAVE_F1             (BaseReg->rF1)
149#define SAVE_F2             (BaseReg->rF2)
150#define SAVE_F3             (BaseReg->rF3)
151#define SAVE_F4             (BaseReg->rF4)
152
153#define SAVE_D1             (BaseReg->rD1)
154#define SAVE_D2             (BaseReg->rD2)
155
156#define SAVE_L1             (BaseReg->rL1)
157
158/* -----------------------------------------------------------------------------
159 * Emit the GCC-specific register declarations for each machine
160 * register being used.  If any STG register isn't mapped to a machine
161 * register, then map it to an offset from BaseReg.
162 *
163 * First, the general purpose registers.  The idea is, if a particular
164 * general-purpose STG register can't be mapped to a real machine
165 * register, it won't be used at all.  Instead, we'll use the stack.
166 *
167 * This is an improvement on the way things used to be done, when all
168 * registers were mapped to locations in the register table, and stuff
169 * was being shifted from the stack to the register table and back
170 * again for no good reason (on register-poor architectures).
171 */
172
173/* define NO_REGS to omit register declarations - used in RTS C code
174 * that needs all the STG definitions but not the global register
175 * settings.
176 */
177#define GLOBAL_REG_DECL(type,name,reg) register type name REG(reg);
178
179#if defined(REG_R1) && !defined(NO_GLOBAL_REG_DECLS)
180GLOBAL_REG_DECL(StgUnion,R1,REG_R1)
181#else
182# define R1 (BaseReg->rR1)
183#endif
184
185#if defined(REG_R2) && !defined(NO_GLOBAL_REG_DECLS)
186GLOBAL_REG_DECL(StgUnion,R2,REG_R2)
187#else
188# define R2 (BaseReg->rR2)
189#endif
190
191#if defined(REG_R3) && !defined(NO_GLOBAL_REG_DECLS)
192GLOBAL_REG_DECL(StgUnion,R3,REG_R3)
193#else
194# define R3 (BaseReg->rR3)
195#endif
196
197#if defined(REG_R4) && !defined(NO_GLOBAL_REG_DECLS)
198GLOBAL_REG_DECL(StgUnion,R4,REG_R4)
199#else
200# define R4 (BaseReg->rR4)
201#endif
202
203#if defined(REG_R5) && !defined(NO_GLOBAL_REG_DECLS)
204GLOBAL_REG_DECL(StgUnion,R5,REG_R5)
205#else
206# define R5 (BaseReg->rR5)
207#endif
208
209#if defined(REG_R6) && !defined(NO_GLOBAL_REG_DECLS)
210GLOBAL_REG_DECL(StgUnion,R6,REG_R6)
211#else
212# define R6 (BaseReg->rR6)
213#endif
214
215#if defined(REG_R7) && !defined(NO_GLOBAL_REG_DECLS)
216GLOBAL_REG_DECL(StgUnion,R7,REG_R7)
217#else
218# define R7 (BaseReg->rR7)
219#endif
220
221#if defined(REG_R8) && !defined(NO_GLOBAL_REG_DECLS)
222GLOBAL_REG_DECL(StgUnion,R8,REG_R8)
223#else
224# define R8 (BaseReg->rR8)
225#endif
226
227#if defined(REG_R9) && !defined(NO_GLOBAL_REG_DECLS)
228GLOBAL_REG_DECL(StgUnion,R9,REG_R9)
229#else
230# define R9 (BaseReg->rR9)
231#endif
232
233#if defined(REG_R10) && !defined(NO_GLOBAL_REG_DECLS)
234GLOBAL_REG_DECL(StgUnion,R10,REG_R10)
235#else
236# define R10 (BaseReg->rR10)
237#endif
238
239#if defined(REG_F1) && !defined(NO_GLOBAL_REG_DECLS)
240GLOBAL_REG_DECL(StgFloat,F1,REG_F1)
241#else
242#define F1 (BaseReg->rF1)
243#endif
244
245#if defined(REG_F2) && !defined(NO_GLOBAL_REG_DECLS)
246GLOBAL_REG_DECL(StgFloat,F2,REG_F2)
247#else
248#define F2 (BaseReg->rF2)
249#endif
250
251#if defined(REG_F3) && !defined(NO_GLOBAL_REG_DECLS)
252GLOBAL_REG_DECL(StgFloat,F3,REG_F3)
253#else
254#define F3 (BaseReg->rF3)
255#endif
256
257#if defined(REG_F4) && !defined(NO_GLOBAL_REG_DECLS)
258GLOBAL_REG_DECL(StgFloat,F4,REG_F4)
259#else
260#define F4 (BaseReg->rF4)
261#endif
262
263#if defined(REG_D1) && !defined(NO_GLOBAL_REG_DECLS)
264GLOBAL_REG_DECL(StgDouble,D1,REG_D1)
265#else
266#define D1 (BaseReg->rD1)
267#endif
268
269#if defined(REG_D2) && !defined(NO_GLOBAL_REG_DECLS)
270GLOBAL_REG_DECL(StgDouble,D2,REG_D2)
271#else
272#define D2 (BaseReg->rD2)
273#endif
274
275#if defined(REG_L1) && !defined(NO_GLOBAL_REG_DECLS)
276GLOBAL_REG_DECL(StgWord64,L1,REG_L1)
277#else
278#define L1 (BaseReg->rL1)
279#endif
280
281/*
282 * If BaseReg isn't mapped to a machine register, just use the global
283 * address of the current register table (CurrentRegTable in
284 * concurrent Haskell, MainRegTable otherwise).
285 */
286
287/* A capability is a combination of a FunTable and a RegTable.  In STG
288 * code, BaseReg normally points to the RegTable portion of this
289 * structure, so that we can index both forwards and backwards to take
290 * advantage of shorter instruction forms on some archs (eg. x86).
291 * This is a cut-down version of the Capability structure; the full
292 * version is defined in Capability.h.
293 */
294struct PartCapability_ {
295    StgFunTable f;
296    StgRegTable r;
297};
298
299/* No such thing as a MainCapability under THREADED_RTS - each thread must have
300 * its own Capability.
301 */
302#if IN_STG_CODE && !(defined(THREADED_RTS) && !defined(NOSMP))
303extern W_ MainCapability[];
304#endif
305
306/*
307 * Assigning to BaseReg (the ASSIGN_BaseReg macro): this happens on
308 * return from a "safe" foreign call, when the thread might be running
309 * on a new Capability.  Obviously if BaseReg is not a register, then
310 * we are restricted to a single Capability (this invariant is enforced
311 * in Capability.c:initCapabilities), and assigning to BaseReg can be omitted.
312 */
313
314#if defined(REG_Base) && !defined(NO_GLOBAL_REG_DECLS)
315GLOBAL_REG_DECL(StgRegTable *,BaseReg,REG_Base)
316#define ASSIGN_BaseReg(e) (BaseReg = (e))
317#else
318#if defined(THREADED_RTS) && !defined(NOSMP)
319#error BaseReg must be in a register for THREADED_RTS
320#endif
321#define BaseReg (&((struct PartCapability_ *)MainCapability)->r)
322#define ASSIGN_BaseReg(e) (e)
323#endif
324
325#if defined(REG_Sp) && !defined(NO_GLOBAL_REG_DECLS)
326GLOBAL_REG_DECL(P_,Sp,REG_Sp)
327#else
328#define Sp (BaseReg->rSp)
329#endif
330
331#if defined(REG_SpLim) && !defined(NO_GLOBAL_REG_DECLS)
332GLOBAL_REG_DECL(P_,SpLim,REG_SpLim)
333#else
334#define SpLim (BaseReg->rSpLim)
335#endif
336
337#if defined(REG_Hp) && !defined(NO_GLOBAL_REG_DECLS)
338GLOBAL_REG_DECL(P_,Hp,REG_Hp)
339#else
340#define Hp (BaseReg->rHp)
341#endif
342
343#if defined(REG_HpLim) && !defined(NO_GLOBAL_REG_DECLS)
344#error HpLim cannot be in a register
345#else
346#define HpLim (BaseReg->rHpLim)
347#endif
348
349#if defined(REG_CCCS) && !defined(NO_GLOBAL_REG_DECLS)
350GLOBAL_REG_DECL(struct CostCentreStack_ *,CCCS,REG_CCCS)
351#else
352#define CCCS (BaseReg->rCCCS)
353#endif
354
355#if defined(REG_CurrentTSO) && !defined(NO_GLOBAL_REG_DECLS)
356GLOBAL_REG_DECL(struct _StgTSO *,CurrentTSO,REG_CurrentTSO)
357#else
358#define CurrentTSO (BaseReg->rCurrentTSO)
359#endif
360
361#if defined(REG_CurrentNursery) && !defined(NO_GLOBAL_REG_DECLS)
362GLOBAL_REG_DECL(bdescr *,CurrentNursery,REG_CurrentNursery)
363#else
364#define CurrentNursery (BaseReg->rCurrentNursery)
365#endif
366
367#if defined(REG_HpAlloc) && !defined(NO_GLOBAL_REG_DECLS)
368GLOBAL_REG_DECL(bdescr *,HpAlloc,REG_HpAlloc)
369#else
370#define HpAlloc (BaseReg->rHpAlloc)
371#endif
372
373/* -----------------------------------------------------------------------------
374   Get absolute function pointers from the register table, to save
375   code space.  On x86,
376
377       jmp  *-12(%ebx)
378
379   is shorter than
380   
381       jmp absolute_address
382
383   as long as the offset is within the range of a signed byte
384   (-128..+127).  So we pick some common absolute_addresses and put
385   them in the register table.  As a bonus, linking time should also
386   be reduced.
387
388   Other possible candidates in order of importance:
389     
390     stg_upd_frame_info
391     stg_CAF_BLACKHOLE_info
392     stg_IND_STATIC_info
393
394   anything else probably isn't worth the effort.
395
396   -------------------------------------------------------------------------- */
397
398
399#define FunReg ((StgFunTable *)((void *)BaseReg - STG_FIELD_OFFSET(struct PartCapability_, r)))
400
401#define stg_EAGER_BLACKHOLE_info  (FunReg->stgEagerBlackholeInfo)
402#define stg_gc_enter_1            (FunReg->stgGCEnter1)
403#define stg_gc_fun                (FunReg->stgGCFun)
404
405/* -----------------------------------------------------------------------------
406   For any registers which are denoted "caller-saves" by the C calling
407   convention, we have to emit code to save and restore them across C
408   calls.
409   -------------------------------------------------------------------------- */
410
411#ifdef CALLER_SAVES_R1
412#define CALLER_SAVE_R1          SAVE_R1 = R1;
413#define CALLER_RESTORE_R1       R1 = SAVE_R1;
414#else
415#define CALLER_SAVE_R1          /* nothing */
416#define CALLER_RESTORE_R1       /* nothing */
417#endif
418
419#ifdef CALLER_SAVES_R2
420#define CALLER_SAVE_R2          SAVE_R2 = R2;
421#define CALLER_RESTORE_R2       R2 = SAVE_R2;
422#else
423#define CALLER_SAVE_R2          /* nothing */
424#define CALLER_RESTORE_R2       /* nothing */
425#endif
426
427#ifdef CALLER_SAVES_R3
428#define CALLER_SAVE_R3          SAVE_R3 = R3;
429#define CALLER_RESTORE_R3       R3 = SAVE_R3;
430#else
431#define CALLER_SAVE_R3          /* nothing */
432#define CALLER_RESTORE_R3       /* nothing */
433#endif
434
435#ifdef CALLER_SAVES_R4
436#define CALLER_SAVE_R4          SAVE_R4 = R4;
437#define CALLER_RESTORE_R4       R4 = SAVE_R4;
438#else
439#define CALLER_SAVE_R4          /* nothing */
440#define CALLER_RESTORE_R4       /* nothing */
441#endif
442
443#ifdef CALLER_SAVES_R5
444#define CALLER_SAVE_R5          SAVE_R5 = R5;
445#define CALLER_RESTORE_R5       R5 = SAVE_R5;
446#else
447#define CALLER_SAVE_R5          /* nothing */
448#define CALLER_RESTORE_R5       /* nothing */
449#endif
450
451#ifdef CALLER_SAVES_R6
452#define CALLER_SAVE_R6          SAVE_R6 = R6;
453#define CALLER_RESTORE_R6       R6 = SAVE_R6;
454#else
455#define CALLER_SAVE_R6          /* nothing */
456#define CALLER_RESTORE_R6       /* nothing */
457#endif
458
459#ifdef CALLER_SAVES_R7
460#define CALLER_SAVE_R7          SAVE_R7 = R7;
461#define CALLER_RESTORE_R7       R7 = SAVE_R7;
462#else
463#define CALLER_SAVE_R7          /* nothing */
464#define CALLER_RESTORE_R7       /* nothing */
465#endif
466
467#ifdef CALLER_SAVES_R8
468#define CALLER_SAVE_R8          SAVE_R8 = R8;
469#define CALLER_RESTORE_R8       R8 = SAVE_R8;
470#else
471#define CALLER_SAVE_R8          /* nothing */
472#define CALLER_RESTORE_R8       /* nothing */
473#endif
474
475#ifdef CALLER_SAVES_R9
476#define CALLER_SAVE_R9          SAVE_R9 = R9;
477#define CALLER_RESTORE_R9       R9 = SAVE_R9;
478#else
479#define CALLER_SAVE_R9          /* nothing */
480#define CALLER_RESTORE_R9       /* nothing */
481#endif
482
483#ifdef CALLER_SAVES_R10
484#define CALLER_SAVE_R10         SAVE_R10 = R10;
485#define CALLER_RESTORE_R10      R10 = SAVE_R10;
486#else
487#define CALLER_SAVE_R10         /* nothing */
488#define CALLER_RESTORE_R10      /* nothing */
489#endif
490
491#ifdef CALLER_SAVES_F1
492#define CALLER_SAVE_F1          SAVE_F1 = F1;
493#define CALLER_RESTORE_F1       F1 = SAVE_F1;
494#else
495#define CALLER_SAVE_F1          /* nothing */
496#define CALLER_RESTORE_F1       /* nothing */
497#endif
498
499#ifdef CALLER_SAVES_F2
500#define CALLER_SAVE_F2          SAVE_F2 = F2;
501#define CALLER_RESTORE_F2       F2 = SAVE_F2;
502#else
503#define CALLER_SAVE_F2          /* nothing */
504#define CALLER_RESTORE_F2       /* nothing */
505#endif
506
507#ifdef CALLER_SAVES_F3
508#define CALLER_SAVE_F3          SAVE_F3 = F3;
509#define CALLER_RESTORE_F3       F3 = SAVE_F3;
510#else
511#define CALLER_SAVE_F3          /* nothing */
512#define CALLER_RESTORE_F3       /* nothing */
513#endif
514
515#ifdef CALLER_SAVES_F4
516#define CALLER_SAVE_F4          SAVE_F4 = F4;
517#define CALLER_RESTORE_F4       F4 = SAVE_F4;
518#else
519#define CALLER_SAVE_F4          /* nothing */
520#define CALLER_RESTORE_F4       /* nothing */
521#endif
522
523#ifdef CALLER_SAVES_D1
524#define CALLER_SAVE_D1          SAVE_D1 = D1;
525#define CALLER_RESTORE_D1       D1 = SAVE_D1;
526#else
527#define CALLER_SAVE_D1          /* nothing */
528#define CALLER_RESTORE_D1       /* nothing */
529#endif
530
531#ifdef CALLER_SAVES_D2
532#define CALLER_SAVE_D2          SAVE_D2 = D2;
533#define CALLER_RESTORE_D2       D2 = SAVE_D2;
534#else
535#define CALLER_SAVE_D2          /* nothing */
536#define CALLER_RESTORE_D2       /* nothing */
537#endif
538
539#ifdef CALLER_SAVES_L1
540#define CALLER_SAVE_L1          SAVE_L1 = L1;
541#define CALLER_RESTORE_L1       L1 = SAVE_L1;
542#else
543#define CALLER_SAVE_L1          /* nothing */
544#define CALLER_RESTORE_L1       /* nothing */
545#endif
546
547#ifdef CALLER_SAVES_Sp
548#define CALLER_SAVE_Sp          SAVE_Sp = Sp;
549#define CALLER_RESTORE_Sp       Sp = SAVE_Sp;
550#else
551#define CALLER_SAVE_Sp          /* nothing */
552#define CALLER_RESTORE_Sp       /* nothing */
553#endif
554
555#ifdef CALLER_SAVES_SpLim
556#define CALLER_SAVE_SpLim       SAVE_SpLim = SpLim;
557#define CALLER_RESTORE_SpLim    SpLim = SAVE_SpLim;
558#else
559#define CALLER_SAVE_SpLim       /* nothing */
560#define CALLER_RESTORE_SpLim    /* nothing */
561#endif
562
563#ifdef CALLER_SAVES_Hp
564#define CALLER_SAVE_Hp          SAVE_Hp = Hp;
565#define CALLER_RESTORE_Hp       Hp = SAVE_Hp;
566#else
567#define CALLER_SAVE_Hp          /* nothing */
568#define CALLER_RESTORE_Hp       /* nothing */
569#endif
570
571#ifdef CALLER_SAVES_Base
572#ifdef THREADED_RTS
573#error "Can't have caller-saved BaseReg with THREADED_RTS"
574#endif
575#define CALLER_SAVE_Base        /* nothing */
576#define CALLER_RESTORE_Base     BaseReg = &MainRegTable;
577#else
578#define CALLER_SAVE_Base        /* nothing */
579#define CALLER_RESTORE_Base     /* nothing */
580#endif
581
582#ifdef CALLER_SAVES_CurrentTSO
583#define CALLER_SAVE_CurrentTSO          SAVE_CurrentTSO = CurrentTSO;
584#define CALLER_RESTORE_CurrentTSO       CurrentTSO = SAVE_CurrentTSO;
585#else
586#define CALLER_SAVE_CurrentTSO          /* nothing */
587#define CALLER_RESTORE_CurrentTSO       /* nothing */
588#endif
589
590#ifdef CALLER_SAVES_CurrentNursery
591#define CALLER_SAVE_CurrentNursery      SAVE_CurrentNursery = CurrentNursery;
592#define CALLER_RESTORE_CurrentNursery   CurrentNursery = SAVE_CurrentNursery;
593#else
594#define CALLER_SAVE_CurrentNursery      /* nothing */
595#define CALLER_RESTORE_CurrentNursery   /* nothing */
596#endif
597
598#ifdef CALLER_SAVES_HpAlloc
599#define CALLER_SAVE_HpAlloc             SAVE_HpAlloc = HpAlloc;
600#define CALLER_RESTORE_HpAlloc          HpAlloc = SAVE_HpAlloc;
601#else
602#define CALLER_SAVE_HpAlloc             /* nothing */
603#define CALLER_RESTORE_HpAlloc          /* nothing */
604#endif
605
606#endif /* IN_STG_CODE */
607
608/* ----------------------------------------------------------------------------
609   Handy bunches of saves/restores
610   ------------------------------------------------------------------------  */
611
612#if IN_STG_CODE
613
614#define CALLER_SAVE_USER                        \
615  CALLER_SAVE_R1                                \
616  CALLER_SAVE_R2                                \
617  CALLER_SAVE_R3                                \
618  CALLER_SAVE_R4                                \
619  CALLER_SAVE_R5                                \
620  CALLER_SAVE_R6                                \
621  CALLER_SAVE_R7                                \
622  CALLER_SAVE_R8                                \
623  CALLER_SAVE_R9                                \
624  CALLER_SAVE_R10                               \
625  CALLER_SAVE_F1                                \
626  CALLER_SAVE_F2                                \
627  CALLER_SAVE_F3                                \
628  CALLER_SAVE_F4                                \
629  CALLER_SAVE_D1                                \
630  CALLER_SAVE_D2                                \
631  CALLER_SAVE_L1
632
633     /* Save Base last, since the others may
634        be addressed relative to it */
635#define CALLER_SAVE_SYSTEM                      \
636  CALLER_SAVE_Sp                                \
637  CALLER_SAVE_SpLim                             \
638  CALLER_SAVE_Hp                                \
639  CALLER_SAVE_CurrentTSO                        \
640  CALLER_SAVE_CurrentNursery                    \
641  CALLER_SAVE_Base
642
643#define CALLER_RESTORE_USER                     \
644  CALLER_RESTORE_R1                             \
645  CALLER_RESTORE_R2                             \
646  CALLER_RESTORE_R3                             \
647  CALLER_RESTORE_R4                             \
648  CALLER_RESTORE_R5                             \
649  CALLER_RESTORE_R6                             \
650  CALLER_RESTORE_R7                             \
651  CALLER_RESTORE_R8                             \
652  CALLER_RESTORE_R9                             \
653  CALLER_RESTORE_R10                    \
654  CALLER_RESTORE_F1                             \
655  CALLER_RESTORE_F2                             \
656  CALLER_RESTORE_F3                             \
657  CALLER_RESTORE_F4                             \
658  CALLER_RESTORE_D1                             \
659  CALLER_RESTORE_D2                             \
660  CALLER_RESTORE_L1
661
662     /* Restore Base first, since the others may
663        be addressed relative to it */
664#define CALLER_RESTORE_SYSTEM                   \
665  CALLER_RESTORE_Base                           \
666  CALLER_RESTORE_Sp                             \
667  CALLER_RESTORE_SpLim                          \
668  CALLER_RESTORE_Hp                             \
669  CALLER_RESTORE_CurrentTSO                     \
670  CALLER_RESTORE_CurrentNursery
671
672#else /* not IN_STG_CODE */
673
674#define CALLER_SAVE_USER       /* nothing */
675#define CALLER_SAVE_SYSTEM     /* nothing */
676#define CALLER_RESTORE_USER    /* nothing */
677#define CALLER_RESTORE_SYSTEM  /* nothing */
678
679#endif /* IN_STG_CODE */
680#define CALLER_SAVE_ALL                         \
681  CALLER_SAVE_SYSTEM                            \
682  CALLER_SAVE_USER
683
684#define CALLER_RESTORE_ALL                      \
685  CALLER_RESTORE_SYSTEM                         \
686  CALLER_RESTORE_USER
687
688#endif /* REGS_H */
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