Refresh config.guess and config.sub
[libffi.git] / .pc / darwin-missing-semi / src / powerpc / ffi_darwin.c
1 /* -----------------------------------------------------------------------
2 ffi_darwin.c
3
4 Copyright (C) 1998 Geoffrey Keating
5 Copyright (C) 2001 John Hornkvist
6 Copyright (C) 2002, 2006, 2007, 2009, 2010 Free Software Foundation, Inc.
7
8 FFI support for Darwin and AIX.
9
10 Permission is hereby granted, free of charge, to any person obtaining
11 a copy of this software and associated documentation files (the
12 ``Software''), to deal in the Software without restriction, including
13 without limitation the rights to use, copy, modify, merge, publish,
14 distribute, sublicense, and/or sell copies of the Software, and to
15 permit persons to whom the Software is furnished to do so, subject to
16 the following conditions:
17
18 The above copyright notice and this permission notice shall be included
19 in all copies or substantial portions of the Software.
20
21 THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS
22 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
23 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
24 IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR
25 OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
26 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
27 OTHER DEALINGS IN THE SOFTWARE.
28 ----------------------------------------------------------------------- */
29
30 #include <ffi.h>
31 #include <ffi_common.h>
32
33 #include <stdlib.h>
34
35 extern void ffi_closure_ASM (void);
36
37 enum {
38 /* The assembly depends on these exact flags.
39 For Darwin64 (when FLAG_RETURNS_STRUCT is set):
40 FLAG_RETURNS_FP indicates that the structure embeds FP data.
41 FLAG_RETURNS_128BITS signals a special struct size that is not
42 expanded for float content. */
43 FLAG_RETURNS_128BITS = 1 << (31-31), /* These go in cr7 */
44 FLAG_RETURNS_NOTHING = 1 << (31-30),
45 FLAG_RETURNS_FP = 1 << (31-29),
46 FLAG_RETURNS_64BITS = 1 << (31-28),
47
48 FLAG_RETURNS_STRUCT = 1 << (31-27), /* This goes in cr6 */
49
50 FLAG_ARG_NEEDS_COPY = 1 << (31- 7),
51 FLAG_FP_ARGUMENTS = 1 << (31- 6), /* cr1.eq; specified by ABI */
52 FLAG_4_GPR_ARGUMENTS = 1 << (31- 5),
53 FLAG_RETVAL_REFERENCE = 1 << (31- 4)
54 };
55
56 /* About the DARWIN ABI. */
57 enum {
58 NUM_GPR_ARG_REGISTERS = 8,
59 NUM_FPR_ARG_REGISTERS = 13,
60 LINKAGE_AREA_GPRS = 6
61 };
62
63 enum { ASM_NEEDS_REGISTERS = 4 }; /* r28-r31 */
64
65 /* ffi_prep_args is called by the assembly routine once stack space
66 has been allocated for the function's arguments.
67
68 m32/m64
69
70 The stack layout we want looks like this:
71
72 | Return address from ffi_call_DARWIN | higher addresses
73 |--------------------------------------------|
74 | Previous backchain pointer 4/8 | stack pointer here
75 |--------------------------------------------|<+ <<< on entry to
76 | ASM_NEEDS_REGISTERS=r28-r31 4*(4/8) | | ffi_call_DARWIN
77 |--------------------------------------------| |
78 | When we have any FP activity... the | |
79 | FPRs occupy NUM_FPR_ARG_REGISTERS slots | |
80 | here fp13 .. fp1 from high to low addr. | |
81 ~ ~ ~
82 | Parameters (at least 8*4/8=32/64) | | NUM_GPR_ARG_REGISTERS
83 |--------------------------------------------| |
84 | TOC=R2 (AIX) Reserved (Darwin) 4/8 | |
85 |--------------------------------------------| | stack |
86 | Reserved 2*4/8 | | grows |
87 |--------------------------------------------| | down V
88 | Space for callee's LR 4/8 | |
89 |--------------------------------------------| | lower addresses
90 | Saved CR [low word for m64] 4/8 | |
91 |--------------------------------------------| | stack pointer here
92 | Current backchain pointer 4/8 |-/ during
93 |--------------------------------------------| <<< ffi_call_DARWIN
94
95 */
96
97 #if defined(POWERPC_DARWIN64)
98 static void
99 darwin64_pass_struct_by_value
100 (ffi_type *, char *, unsigned, unsigned *, double **, unsigned long **);
101 #endif
102
103 /* This depends on GPR_SIZE = sizeof (unsigned long) */
104
105 void
106 ffi_prep_args (extended_cif *ecif, unsigned long *const stack)
107 {
108 const unsigned bytes = ecif->cif->bytes;
109 const unsigned flags = ecif->cif->flags;
110 const unsigned nargs = ecif->cif->nargs;
111 #if !defined(POWERPC_DARWIN64)
112 const ffi_abi abi = ecif->cif->abi;
113 #endif
114
115 /* 'stacktop' points at the previous backchain pointer. */
116 unsigned long *const stacktop = stack + (bytes / sizeof(unsigned long));
117
118 /* 'fpr_base' points at the space for fpr1, and grows upwards as
119 we use FPR registers. */
120 double *fpr_base = (double *) (stacktop - ASM_NEEDS_REGISTERS) - NUM_FPR_ARG_REGISTERS;
121 int gp_count = 0, fparg_count = 0;
122
123 /* 'next_arg' grows up as we put parameters in it. */
124 unsigned long *next_arg = stack + LINKAGE_AREA_GPRS; /* 6 reserved positions. */
125
126 int i;
127 double double_tmp;
128 void **p_argv = ecif->avalue;
129 unsigned long gprvalue;
130 ffi_type** ptr = ecif->cif->arg_types;
131 #if !defined(POWERPC_DARWIN64)
132 char *dest_cpy;
133 #endif
134 unsigned size_al = 0;
135
136 /* Check that everything starts aligned properly. */
137 FFI_ASSERT(((unsigned) (char *) stack & 0xF) == 0);
138 FFI_ASSERT(((unsigned) (char *) stacktop & 0xF) == 0);
139 FFI_ASSERT((bytes & 0xF) == 0);
140
141 /* Deal with return values that are actually pass-by-reference.
142 Rule:
143 Return values are referenced by r3, so r4 is the first parameter. */
144
145 if (flags & FLAG_RETVAL_REFERENCE)
146 *next_arg++ = (unsigned long) (char *) ecif->rvalue;
147
148 /* Now for the arguments. */
149 for (i = nargs; i > 0; i--, ptr++, p_argv++)
150 {
151 switch ((*ptr)->type)
152 {
153 /* If a floating-point parameter appears before all of the general-
154 purpose registers are filled, the corresponding GPRs that match
155 the size of the floating-point parameter are skipped. */
156 case FFI_TYPE_FLOAT:
157 double_tmp = *(float *) *p_argv;
158 if (fparg_count < NUM_FPR_ARG_REGISTERS)
159 *fpr_base++ = double_tmp;
160 #if defined(POWERPC_DARWIN)
161 *(float *)next_arg = *(float *) *p_argv;
162 #else
163 *(double *)next_arg = double_tmp;
164 #endif
165 next_arg++;
166 gp_count++;
167 fparg_count++;
168 FFI_ASSERT(flags & FLAG_FP_ARGUMENTS);
169 break;
170
171 case FFI_TYPE_DOUBLE:
172 double_tmp = *(double *) *p_argv;
173 if (fparg_count < NUM_FPR_ARG_REGISTERS)
174 *fpr_base++ = double_tmp;
175 *(double *)next_arg = double_tmp;
176 #ifdef POWERPC64
177 next_arg++;
178 gp_count++;
179 #else
180 next_arg += 2;
181 gp_count += 2;
182 #endif
183 fparg_count++;
184 FFI_ASSERT(flags & FLAG_FP_ARGUMENTS);
185 break;
186
187 #if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
188
189 case FFI_TYPE_LONGDOUBLE:
190 # if defined(POWERPC64) && !defined(POWERPC_DARWIN64)
191 /* ??? This will exceed the regs count when the value starts at fp13
192 and it will not put the extra bit on the stack. */
193 if (fparg_count < NUM_FPR_ARG_REGISTERS)
194 *(long double *) fpr_base++ = *(long double *) *p_argv;
195 else
196 *(long double *) next_arg = *(long double *) *p_argv;
197 next_arg += 2;
198 fparg_count += 2;
199 # else
200 double_tmp = ((double *) *p_argv)[0];
201 if (fparg_count < NUM_FPR_ARG_REGISTERS)
202 *fpr_base++ = double_tmp;
203 *(double *) next_arg = double_tmp;
204 # if defined(POWERPC_DARWIN64)
205 next_arg++;
206 gp_count++;
207 # else
208 next_arg += 2;
209 gp_count += 2;
210 # endif
211 fparg_count++;
212 double_tmp = ((double *) *p_argv)[1];
213 if (fparg_count < NUM_FPR_ARG_REGISTERS)
214 *fpr_base++ = double_tmp;
215 *(double *) next_arg = double_tmp;
216 # if defined(POWERPC_DARWIN64)
217 next_arg++;
218 gp_count++;
219 # else
220 next_arg += 2;
221 gp_count += 2;
222 # endif
223 fparg_count++;
224 # endif
225 FFI_ASSERT(flags & FLAG_FP_ARGUMENTS);
226 break;
227 #endif
228 case FFI_TYPE_UINT64:
229 case FFI_TYPE_SINT64:
230 #ifdef POWERPC64
231 gprvalue = *(long long *) *p_argv;
232 goto putgpr;
233 #else
234 *(long long *) next_arg = *(long long *) *p_argv;
235 next_arg += 2;
236 gp_count += 2;
237 #endif
238 break;
239 case FFI_TYPE_POINTER:
240 gprvalue = *(unsigned long *) *p_argv;
241 goto putgpr;
242 case FFI_TYPE_UINT8:
243 gprvalue = *(unsigned char *) *p_argv;
244 goto putgpr;
245 case FFI_TYPE_SINT8:
246 gprvalue = *(signed char *) *p_argv;
247 goto putgpr;
248 case FFI_TYPE_UINT16:
249 gprvalue = *(unsigned short *) *p_argv;
250 goto putgpr;
251 case FFI_TYPE_SINT16:
252 gprvalue = *(signed short *) *p_argv;
253 goto putgpr;
254
255 case FFI_TYPE_STRUCT:
256 size_al = (*ptr)->size;
257 #if defined(POWERPC_DARWIN64)
258 next_arg = (unsigned long *)ALIGN((char *)next_arg, (*ptr)->alignment);
259 darwin64_pass_struct_by_value (*ptr, (char *) *p_argv,
260 (unsigned) size_al,
261 (unsigned int *) &fparg_count,
262 &fpr_base, &next_arg);
263 #else
264 dest_cpy = (char *) next_arg;
265
266 /* If the first member of the struct is a double, then include enough
267 padding in the struct size to align it to double-word. */
268 if ((*ptr)->elements[0]->type == FFI_TYPE_DOUBLE)
269 size_al = ALIGN((*ptr)->size, 8);
270
271 # if defined(POWERPC64)
272 FFI_ASSERT (abi != FFI_DARWIN);
273 memcpy ((char *) dest_cpy, (char *) *p_argv, size_al);
274 next_arg += (size_al + 7) / 8;
275 # else
276 /* Structures that match the basic modes (QI 1 byte, HI 2 bytes,
277 SI 4 bytes) are aligned as if they were those modes.
278 Structures with 3 byte in size are padded upwards. */
279 if (size_al < 3 && abi == FFI_DARWIN)
280 dest_cpy += 4 - size_al;
281
282 memcpy((char *) dest_cpy, (char *) *p_argv, size_al);
283 next_arg += (size_al + 3) / 4;
284 # endif
285 #endif
286 break;
287
288 case FFI_TYPE_INT:
289 case FFI_TYPE_SINT32:
290 gprvalue = *(signed int *) *p_argv;
291 goto putgpr;
292
293 case FFI_TYPE_UINT32:
294 gprvalue = *(unsigned int *) *p_argv;
295 putgpr:
296 *next_arg++ = gprvalue;
297 gp_count++;
298 break;
299 default:
300 break;
301 }
302 }
303
304 /* Check that we didn't overrun the stack... */
305 //FFI_ASSERT(gpr_base <= stacktop - ASM_NEEDS_REGISTERS);
306 //FFI_ASSERT((unsigned *)fpr_base
307 // <= stacktop - ASM_NEEDS_REGISTERS - NUM_GPR_ARG_REGISTERS);
308 //FFI_ASSERT(flags & FLAG_4_GPR_ARGUMENTS || intarg_count <= 4);
309 }
310
311 #if defined(POWERPC_DARWIN64)
312
313 /* See if we can put some of the struct into fprs.
314 This should not be called for structures of size 16 bytes, since these are not
315 broken out this way. */
316 static void
317 darwin64_scan_struct_for_floats (ffi_type *s, unsigned *nfpr)
318 {
319 int i;
320
321 FFI_ASSERT (s->type == FFI_TYPE_STRUCT)
322
323 for (i = 0; s->elements[i] != NULL; i++)
324 {
325 ffi_type *p = s->elements[i];
326 switch (p->type)
327 {
328 case FFI_TYPE_STRUCT:
329 darwin64_scan_struct_for_floats (p, nfpr);
330 break;
331 case FFI_TYPE_LONGDOUBLE:
332 (*nfpr) += 2;
333 break;
334 case FFI_TYPE_DOUBLE:
335 case FFI_TYPE_FLOAT:
336 (*nfpr) += 1;
337 break;
338 default:
339 break;
340 }
341 }
342 }
343
344 static int
345 darwin64_struct_size_exceeds_gprs_p (ffi_type *s, char *src, unsigned *nfpr)
346 {
347 unsigned struct_offset=0, i;
348
349 for (i = 0; s->elements[i] != NULL; i++)
350 {
351 char *item_base;
352 ffi_type *p = s->elements[i];
353 /* Find the start of this item (0 for the first one). */
354 if (i > 0)
355 struct_offset = ALIGN(struct_offset, p->alignment);
356
357 item_base = src + struct_offset;
358
359 switch (p->type)
360 {
361 case FFI_TYPE_STRUCT:
362 if (darwin64_struct_size_exceeds_gprs_p (p, item_base, nfpr))
363 return 1;
364 break;
365 case FFI_TYPE_LONGDOUBLE:
366 if (*nfpr >= NUM_FPR_ARG_REGISTERS)
367 return 1;
368 (*nfpr) += 1;
369 item_base += 8;
370 /* FALL THROUGH */
371 case FFI_TYPE_DOUBLE:
372 if (*nfpr >= NUM_FPR_ARG_REGISTERS)
373 return 1;
374 (*nfpr) += 1;
375 break;
376 case FFI_TYPE_FLOAT:
377 if (*nfpr >= NUM_FPR_ARG_REGISTERS)
378 return 1;
379 (*nfpr) += 1;
380 break;
381 default:
382 /* If we try and place any item, that is non-float, once we've
383 exceeded the 8 GPR mark, then we can't fit the struct. */
384 if ((unsigned long)item_base >= 8*8)
385 return 1;
386 break;
387 }
388 /* now count the size of what we just used. */
389 struct_offset += p->size;
390 }
391 return 0;
392 }
393
394 /* Can this struct be returned by value? */
395 int
396 darwin64_struct_ret_by_value_p (ffi_type *s)
397 {
398 unsigned nfp = 0;
399
400 FFI_ASSERT (s && s->type == FFI_TYPE_STRUCT);
401
402 /* The largest structure we can return is 8long + 13 doubles. */
403 if (s->size > 168)
404 return 0;
405
406 /* We can't pass more than 13 floats. */
407 darwin64_scan_struct_for_floats (s, &nfp);
408 if (nfp > 13)
409 return 0;
410
411 /* If there are not too many floats, and the struct is
412 small enough to accommodate in the GPRs, then it must be OK. */
413 if (s->size <= 64)
414 return 1;
415
416 /* Well, we have to look harder. */
417 nfp = 0;
418 if (darwin64_struct_size_exceeds_gprs_p (s, NULL, &nfp))
419 return 0;
420
421 return 1;
422 }
423
424 void
425 darwin64_pass_struct_floats (ffi_type *s, char *src,
426 unsigned *nfpr, double **fprs)
427 {
428 int i;
429 double *fpr_base = *fprs;
430 unsigned struct_offset = 0;
431
432 /* We don't assume anything about the alignment of the source. */
433 for (i = 0; s->elements[i] != NULL; i++)
434 {
435 char *item_base;
436 ffi_type *p = s->elements[i];
437 /* Find the start of this item (0 for the first one). */
438 if (i > 0)
439 struct_offset = ALIGN(struct_offset, p->alignment);
440 item_base = src + struct_offset;
441
442 switch (p->type)
443 {
444 case FFI_TYPE_STRUCT:
445 darwin64_pass_struct_floats (p, item_base, nfpr,
446 &fpr_base);
447 break;
448 case FFI_TYPE_LONGDOUBLE:
449 if (*nfpr < NUM_FPR_ARG_REGISTERS)
450 *fpr_base++ = *(double *)item_base;
451 (*nfpr) += 1;
452 item_base += 8;
453 /* FALL THROUGH */
454 case FFI_TYPE_DOUBLE:
455 if (*nfpr < NUM_FPR_ARG_REGISTERS)
456 *fpr_base++ = *(double *)item_base;
457 (*nfpr) += 1;
458 break;
459 case FFI_TYPE_FLOAT:
460 if (*nfpr < NUM_FPR_ARG_REGISTERS)
461 *fpr_base++ = (double) *(float *)item_base;
462 (*nfpr) += 1;
463 break;
464 default:
465 break;
466 }
467 /* now count the size of what we just used. */
468 struct_offset += p->size;
469 }
470 /* Update the scores. */
471 *fprs = fpr_base;
472 }
473
474 /* Darwin64 special rules.
475 Break out a struct into params and float registers. */
476 static void
477 darwin64_pass_struct_by_value (ffi_type *s, char *src, unsigned size,
478 unsigned *nfpr, double **fprs, unsigned long **arg)
479 {
480 unsigned long *next_arg = *arg;
481 char *dest_cpy = (char *)next_arg;
482
483 FFI_ASSERT (s->type == FFI_TYPE_STRUCT)
484
485 if (!size)
486 return;
487
488 /* First... special cases. */
489 if (size < 3
490 || (size == 4
491 && s->elements[0]
492 && s->elements[0]->type != FFI_TYPE_FLOAT))
493 {
494 /* Must be at least one GPR, padding is unspecified in value,
495 let's make it zero. */
496 *next_arg = 0UL;
497 dest_cpy += 8 - size;
498 memcpy ((char *) dest_cpy, src, size);
499 next_arg++;
500 }
501 else if (size == 16)
502 {
503 memcpy ((char *) dest_cpy, src, size);
504 next_arg += 2;
505 }
506 else
507 {
508 /* now the general case, we consider embedded floats. */
509 memcpy ((char *) dest_cpy, src, size);
510 darwin64_pass_struct_floats (s, src, nfpr, fprs);
511 next_arg += (size+7)/8;
512 }
513
514 *arg = next_arg;
515 }
516
517 double *
518 darwin64_struct_floats_to_mem (ffi_type *s, char *dest, double *fprs, unsigned *nf)
519 {
520 int i;
521 unsigned struct_offset = 0;
522
523 /* We don't assume anything about the alignment of the source. */
524 for (i = 0; s->elements[i] != NULL; i++)
525 {
526 char *item_base;
527 ffi_type *p = s->elements[i];
528 /* Find the start of this item (0 for the first one). */
529 if (i > 0)
530 struct_offset = ALIGN(struct_offset, p->alignment);
531 item_base = dest + struct_offset;
532
533 switch (p->type)
534 {
535 case FFI_TYPE_STRUCT:
536 fprs = darwin64_struct_floats_to_mem (p, item_base, fprs, nf);
537 break;
538 case FFI_TYPE_LONGDOUBLE:
539 if (*nf < NUM_FPR_ARG_REGISTERS)
540 {
541 *(double *)item_base = *fprs++ ;
542 (*nf) += 1;
543 }
544 item_base += 8;
545 /* FALL THROUGH */
546 case FFI_TYPE_DOUBLE:
547 if (*nf < NUM_FPR_ARG_REGISTERS)
548 {
549 *(double *)item_base = *fprs++ ;
550 (*nf) += 1;
551 }
552 break;
553 case FFI_TYPE_FLOAT:
554 if (*nf < NUM_FPR_ARG_REGISTERS)
555 {
556 *(float *)item_base = (float) *fprs++ ;
557 (*nf) += 1;
558 }
559 break;
560 default:
561 break;
562 }
563 /* now count the size of what we just used. */
564 struct_offset += p->size;
565 }
566 return fprs;
567 }
568
569 #endif
570
571 /* Adjust the size of S to be correct for Darwin.
572 On Darwin m32, the first field of a structure has natural alignment.
573 On Darwin m64, all fields have natural alignment. */
574
575 static void
576 darwin_adjust_aggregate_sizes (ffi_type *s)
577 {
578 int i;
579
580 if (s->type != FFI_TYPE_STRUCT)
581 return;
582
583 s->size = 0;
584 for (i = 0; s->elements[i] != NULL; i++)
585 {
586 ffi_type *p;
587 int align;
588
589 p = s->elements[i];
590 if (p->type == FFI_TYPE_STRUCT)
591 darwin_adjust_aggregate_sizes (p);
592 #if defined(POWERPC_DARWIN64)
593 /* Natural alignment for all items. */
594 align = p->alignment;
595 #else
596 /* Natrual alignment for the first item... */
597 if (i == 0)
598 align = p->alignment;
599 else if (p->alignment == 16 || p->alignment < 4)
600 /* .. subsequent items with vector or align < 4 have natural align. */
601 align = p->alignment;
602 else
603 /* .. or align is 4. */
604 align = 4;
605 #endif
606 /* Pad, if necessary, before adding the current item. */
607 s->size = ALIGN(s->size, align) + p->size;
608 }
609
610 s->size = ALIGN(s->size, s->alignment);
611
612 /* This should not be necessary on m64, but harmless. */
613 if (s->elements[0]->type == FFI_TYPE_UINT64
614 || s->elements[0]->type == FFI_TYPE_SINT64
615 || s->elements[0]->type == FFI_TYPE_DOUBLE
616 || s->elements[0]->alignment == 8)
617 s->alignment = s->alignment > 8 ? s->alignment : 8;
618 /* Do not add additional tail padding. */
619 }
620
621 /* Adjust the size of S to be correct for AIX.
622 Word-align double unless it is the first member of a structure. */
623
624 static void
625 aix_adjust_aggregate_sizes (ffi_type *s)
626 {
627 int i;
628
629 if (s->type != FFI_TYPE_STRUCT)
630 return;
631
632 s->size = 0;
633 for (i = 0; s->elements[i] != NULL; i++)
634 {
635 ffi_type *p;
636 int align;
637
638 p = s->elements[i];
639 aix_adjust_aggregate_sizes (p);
640 align = p->alignment;
641 if (i != 0 && p->type == FFI_TYPE_DOUBLE)
642 align = 4;
643 s->size = ALIGN(s->size, align) + p->size;
644 }
645
646 s->size = ALIGN(s->size, s->alignment);
647
648 if (s->elements[0]->type == FFI_TYPE_UINT64
649 || s->elements[0]->type == FFI_TYPE_SINT64
650 || s->elements[0]->type == FFI_TYPE_DOUBLE
651 || s->elements[0]->alignment == 8)
652 s->alignment = s->alignment > 8 ? s->alignment : 8;
653 /* Do not add additional tail padding. */
654 }
655
656 /* Perform machine dependent cif processing. */
657 ffi_status
658 ffi_prep_cif_machdep (ffi_cif *cif)
659 {
660 /* All this is for the DARWIN ABI. */
661 unsigned i;
662 ffi_type **ptr;
663 unsigned bytes;
664 unsigned fparg_count = 0, intarg_count = 0;
665 unsigned flags = 0;
666 unsigned size_al = 0;
667
668 /* All the machine-independent calculation of cif->bytes will be wrong.
669 All the calculation of structure sizes will also be wrong.
670 Redo the calculation for DARWIN. */
671
672 if (cif->abi == FFI_DARWIN)
673 {
674 darwin_adjust_aggregate_sizes (cif->rtype);
675 for (i = 0; i < cif->nargs; i++)
676 darwin_adjust_aggregate_sizes (cif->arg_types[i]);
677 }
678
679 if (cif->abi == FFI_AIX)
680 {
681 aix_adjust_aggregate_sizes (cif->rtype);
682 for (i = 0; i < cif->nargs; i++)
683 aix_adjust_aggregate_sizes (cif->arg_types[i]);
684 }
685
686 /* Space for the frame pointer, callee's LR, CR, etc, and for
687 the asm's temp regs. */
688
689 bytes = (LINKAGE_AREA_GPRS + ASM_NEEDS_REGISTERS) * sizeof(unsigned long);
690
691 /* Return value handling.
692 The rules m32 are as follows:
693 - 32-bit (or less) integer values are returned in gpr3;
694 - structures of size <= 4 bytes also returned in gpr3;
695 - 64-bit integer values [??? and structures between 5 and 8 bytes] are
696 returned in gpr3 and gpr4;
697 - Single/double FP values are returned in fpr1;
698 - Long double FP (if not equivalent to double) values are returned in
699 fpr1 and fpr2;
700 m64:
701 - 64-bit or smaller integral values are returned in GPR3
702 - Single/double FP values are returned in fpr1;
703 - Long double FP values are returned in fpr1 and fpr2;
704 m64 Structures:
705 - If the structure could be accommodated in registers were it to be the
706 first argument to a routine, then it is returned in those registers.
707 m32/m64 structures otherwise:
708 - Larger structures values are allocated space and a pointer is passed
709 as the first argument. */
710 switch (cif->rtype->type)
711 {
712
713 #if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
714 case FFI_TYPE_LONGDOUBLE:
715 flags |= FLAG_RETURNS_128BITS;
716 flags |= FLAG_RETURNS_FP;
717 break;
718 #endif
719
720 case FFI_TYPE_DOUBLE:
721 flags |= FLAG_RETURNS_64BITS;
722 /* Fall through. */
723 case FFI_TYPE_FLOAT:
724 flags |= FLAG_RETURNS_FP;
725 break;
726
727 case FFI_TYPE_UINT64:
728 case FFI_TYPE_SINT64:
729 #ifdef POWERPC64
730 case FFI_TYPE_POINTER:
731 #endif
732 flags |= FLAG_RETURNS_64BITS;
733 break;
734
735 case FFI_TYPE_STRUCT:
736 #if defined(POWERPC_DARWIN64)
737 {
738 /* Can we fit the struct into regs? */
739 if (darwin64_struct_ret_by_value_p (cif->rtype))
740 {
741 unsigned nfpr = 0;
742 flags |= FLAG_RETURNS_STRUCT;
743 if (cif->rtype->size != 16)
744 darwin64_scan_struct_for_floats (cif->rtype, &nfpr) ;
745 else
746 flags |= FLAG_RETURNS_128BITS;
747 /* Will be 0 for 16byte struct. */
748 if (nfpr)
749 flags |= FLAG_RETURNS_FP;
750 }
751 else /* By ref. */
752 {
753 flags |= FLAG_RETVAL_REFERENCE;
754 flags |= FLAG_RETURNS_NOTHING;
755 intarg_count++;
756 }
757 }
758 #elif defined(DARWIN_PPC)
759 if (cif->rtype->size <= 4)
760 flags |= FLAG_RETURNS_STRUCT;
761 else /* else by reference. */
762 {
763 flags |= FLAG_RETVAL_REFERENCE;
764 flags |= FLAG_RETURNS_NOTHING;
765 intarg_count++;
766 }
767 #else /* assume we pass by ref. */
768 flags |= FLAG_RETVAL_REFERENCE;
769 flags |= FLAG_RETURNS_NOTHING;
770 intarg_count++;
771 #endif
772 break;
773 case FFI_TYPE_VOID:
774 flags |= FLAG_RETURNS_NOTHING;
775 break;
776
777 default:
778 /* Returns 32-bit integer, or similar. Nothing to do here. */
779 break;
780 }
781
782 /* The first NUM_GPR_ARG_REGISTERS words of integer arguments, and the
783 first NUM_FPR_ARG_REGISTERS fp arguments, go in registers; the rest
784 goes on the stack.
785 ??? Structures are passed as a pointer to a copy of the structure.
786 Stuff on the stack needs to keep proper alignment.
787 For m64 the count is effectively of half-GPRs. */
788 for (ptr = cif->arg_types, i = cif->nargs; i > 0; i--, ptr++)
789 {
790 unsigned align_words;
791 switch ((*ptr)->type)
792 {
793 case FFI_TYPE_FLOAT:
794 case FFI_TYPE_DOUBLE:
795 fparg_count++;
796 #if !defined(POWERPC_DARWIN64)
797 /* If this FP arg is going on the stack, it must be
798 8-byte-aligned. */
799 if (fparg_count > NUM_FPR_ARG_REGISTERS
800 && (intarg_count & 0x01) != 0)
801 intarg_count++;
802 #endif
803 break;
804
805 #if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
806 case FFI_TYPE_LONGDOUBLE:
807 fparg_count += 2;
808 /* If this FP arg is going on the stack, it must be
809 16-byte-aligned. */
810 if (fparg_count >= NUM_FPR_ARG_REGISTERS)
811 #if defined (POWERPC64)
812 intarg_count = ALIGN(intarg_count, 2);
813 #else
814 intarg_count = ALIGN(intarg_count, 4);
815 #endif
816 break;
817 #endif
818
819 case FFI_TYPE_UINT64:
820 case FFI_TYPE_SINT64:
821 #if defined(POWERPC64)
822 intarg_count++;
823 #else
824 /* 'long long' arguments are passed as two words, but
825 either both words must fit in registers or both go
826 on the stack. If they go on the stack, they must
827 be 8-byte-aligned. */
828 if (intarg_count == NUM_GPR_ARG_REGISTERS-1
829 || (intarg_count >= NUM_GPR_ARG_REGISTERS
830 && (intarg_count & 0x01) != 0))
831 intarg_count++;
832 intarg_count += 2;
833 #endif
834 break;
835
836 case FFI_TYPE_STRUCT:
837 size_al = (*ptr)->size;
838 #if defined(POWERPC_DARWIN64)
839 align_words = (*ptr)->alignment >> 3;
840 if (align_words)
841 intarg_count = ALIGN(intarg_count, align_words);
842 /* Base size of the struct. */
843 intarg_count += (size_al + 7) / 8;
844 /* If 16 bytes then don't worry about floats. */
845 if (size_al != 16)
846 /* Scan through for floats to be placed in regs. */
847 darwin64_scan_struct_for_floats (*ptr, &fparg_count) ;
848 #else
849 align_words = (*ptr)->alignment >> 2;
850 if (align_words)
851 intarg_count = ALIGN(intarg_count, align_words);
852 /* If the first member of the struct is a double, then align
853 the struct to double-word.
854 if ((*ptr)->elements[0]->type == FFI_TYPE_DOUBLE)
855 size_al = ALIGN((*ptr)->size, 8); */
856 # ifdef POWERPC64
857 intarg_count += (size_al + 7) / 8;
858 # else
859 intarg_count += (size_al + 3) / 4;
860 # endif
861 #endif
862 break;
863
864 default:
865 /* Everything else is passed as a 4-byte word in a GPR, either
866 the object itself or a pointer to it. */
867 intarg_count++;
868 break;
869 }
870 }
871
872 if (fparg_count != 0)
873 flags |= FLAG_FP_ARGUMENTS;
874
875 #if defined(POWERPC_DARWIN64)
876 /* Space to image the FPR registers, if needed - which includes when they might be
877 used in a struct return. */
878 if (fparg_count != 0
879 || ((flags & FLAG_RETURNS_STRUCT)
880 && (flags & FLAG_RETURNS_FP)))
881 bytes += NUM_FPR_ARG_REGISTERS * sizeof(double);
882 #else
883 /* Space for the FPR registers, if needed. */
884 if (fparg_count != 0)
885 bytes += NUM_FPR_ARG_REGISTERS * sizeof(double);
886 #endif
887
888 /* Stack space. */
889 #ifdef POWERPC64
890 if ((intarg_count + fparg_count) > NUM_GPR_ARG_REGISTERS)
891 bytes += (intarg_count + fparg_count) * sizeof(long);
892 #else
893 if ((intarg_count + 2 * fparg_count) > NUM_GPR_ARG_REGISTERS)
894 bytes += (intarg_count + 2 * fparg_count) * sizeof(long);
895 #endif
896 else
897 bytes += NUM_GPR_ARG_REGISTERS * sizeof(long);
898
899 /* The stack space allocated needs to be a multiple of 16 bytes. */
900 bytes = ALIGN(bytes, 16) ;
901
902 cif->flags = flags;
903 cif->bytes = bytes;
904
905 return FFI_OK;
906 }
907
908 extern void ffi_call_AIX(extended_cif *, long, unsigned, unsigned *,
909 void (*fn)(void), void (*fn2)(void));
910
911 extern void ffi_call_DARWIN(extended_cif *, long, unsigned, unsigned *,
912 void (*fn)(void), void (*fn2)(void), ffi_type*);
913
914 void
915 ffi_call (ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue)
916 {
917 extended_cif ecif;
918
919 ecif.cif = cif;
920 ecif.avalue = avalue;
921
922 /* If the return value is a struct and we don't have a return
923 value address then we need to make one. */
924
925 if ((rvalue == NULL) &&
926 (cif->rtype->type == FFI_TYPE_STRUCT))
927 {
928 ecif.rvalue = alloca (cif->rtype->size);
929 }
930 else
931 ecif.rvalue = rvalue;
932
933 switch (cif->abi)
934 {
935 case FFI_AIX:
936 ffi_call_AIX(&ecif, -(long)cif->bytes, cif->flags, ecif.rvalue, fn,
937 FFI_FN(ffi_prep_args));
938 break;
939 case FFI_DARWIN:
940 ffi_call_DARWIN(&ecif, -(long)cif->bytes, cif->flags, ecif.rvalue, fn,
941 FFI_FN(ffi_prep_args), cif->rtype);
942 break;
943 default:
944 FFI_ASSERT(0);
945 break;
946 }
947 }
948
949 static void flush_icache(char *);
950 static void flush_range(char *, int);
951
952 /* The layout of a function descriptor. A C function pointer really
953 points to one of these. */
954
955 typedef struct aix_fd_struct {
956 void *code_pointer;
957 void *toc;
958 } aix_fd;
959
960 /* here I'd like to add the stack frame layout we use in darwin_closure.S
961 and aix_closure.S
962
963 m32/m64
964
965 The stack layout looks like this:
966
967 | Additional params... | | Higher address
968 ~ ~ ~
969 | Parameters (at least 8*4/8=32/64) | | NUM_GPR_ARG_REGISTERS
970 |--------------------------------------------| |
971 | TOC=R2 (AIX) Reserved (Darwin) 4/8 | |
972 |--------------------------------------------| |
973 | Reserved 2*4/8 | |
974 |--------------------------------------------| |
975 | Space for callee's LR 4/8 | |
976 |--------------------------------------------| |
977 | Saved CR [low word for m64] 4/8 | |
978 |--------------------------------------------| |
979 | Current backchain pointer 4/8 |-/ Parent's frame.
980 |--------------------------------------------| <+ <<< on entry to ffi_closure_ASM
981 | Result Bytes 16 | |
982 |--------------------------------------------| |
983 ~ padding to 16-byte alignment ~ ~
984 |--------------------------------------------| |
985 | NUM_FPR_ARG_REGISTERS slots | |
986 | here fp13 .. fp1 13*8 | |
987 |--------------------------------------------| |
988 | R3..R10 8*4/8=32/64 | | NUM_GPR_ARG_REGISTERS
989 |--------------------------------------------| |
990 | TOC=R2 (AIX) Reserved (Darwin) 4/8 | |
991 |--------------------------------------------| | stack |
992 | Reserved [compiler,binder] 2*4/8 | | grows |
993 |--------------------------------------------| | down V
994 | Space for callee's LR 4/8 | |
995 |--------------------------------------------| | lower addresses
996 | Saved CR [low word for m64] 4/8 | |
997 |--------------------------------------------| | stack pointer here
998 | Current backchain pointer 4/8 |-/ during
999 |--------------------------------------------| <<< ffi_closure_ASM.
1000
1001 */
1002
1003 ffi_status
1004 ffi_prep_closure_loc (ffi_closure* closure,
1005 ffi_cif* cif,
1006 void (*fun)(ffi_cif*, void*, void**, void*),
1007 void *user_data,
1008 void *codeloc)
1009 {
1010 unsigned int *tramp;
1011 struct ffi_aix_trampoline_struct *tramp_aix;
1012 aix_fd *fd;
1013
1014 switch (cif->abi)
1015 {
1016 case FFI_DARWIN:
1017
1018 FFI_ASSERT (cif->abi == FFI_DARWIN);
1019
1020 tramp = (unsigned int *) &closure->tramp[0];
1021 #if defined(POWERPC_DARWIN64)
1022 tramp[0] = 0x7c0802a6; /* mflr r0 */
1023 tramp[1] = 0x429f0015; /* bcl- 20,4*cr7+so, +0x18 (L1) */
1024 /* We put the addresses here. */
1025 tramp[6] = 0x7d6802a6; /*L1: mflr r11 */
1026 tramp[7] = 0xe98b0000; /* ld r12,0(r11) function address */
1027 tramp[8] = 0x7c0803a6; /* mtlr r0 */
1028 tramp[9] = 0x7d8903a6; /* mtctr r12 */
1029 tramp[10] = 0xe96b0008; /* lwz r11,8(r11) static chain */
1030 tramp[11] = 0x4e800420; /* bctr */
1031
1032 *((unsigned long *)&tramp[2]) = (unsigned long) ffi_closure_ASM; /* function */
1033 *((unsigned long *)&tramp[4]) = (unsigned long) codeloc; /* context */
1034 #else
1035 tramp[0] = 0x7c0802a6; /* mflr r0 */
1036 tramp[1] = 0x429f000d; /* bcl- 20,4*cr7+so,0x10 */
1037 tramp[4] = 0x7d6802a6; /* mflr r11 */
1038 tramp[5] = 0x818b0000; /* lwz r12,0(r11) function address */
1039 tramp[6] = 0x7c0803a6; /* mtlr r0 */
1040 tramp[7] = 0x7d8903a6; /* mtctr r12 */
1041 tramp[8] = 0x816b0004; /* lwz r11,4(r11) static chain */
1042 tramp[9] = 0x4e800420; /* bctr */
1043 tramp[2] = (unsigned long) ffi_closure_ASM; /* function */
1044 tramp[3] = (unsigned long) codeloc; /* context */
1045 #endif
1046 closure->cif = cif;
1047 closure->fun = fun;
1048 closure->user_data = user_data;
1049
1050 /* Flush the icache. Only necessary on Darwin. */
1051 flush_range(codeloc, FFI_TRAMPOLINE_SIZE);
1052
1053 break;
1054
1055 case FFI_AIX:
1056
1057 tramp_aix = (struct ffi_aix_trampoline_struct *) (closure->tramp);
1058 fd = (aix_fd *)(void *)ffi_closure_ASM;
1059
1060 FFI_ASSERT (cif->abi == FFI_AIX);
1061
1062 tramp_aix->code_pointer = fd->code_pointer;
1063 tramp_aix->toc = fd->toc;
1064 tramp_aix->static_chain = codeloc;
1065 closure->cif = cif;
1066 closure->fun = fun;
1067 closure->user_data = user_data;
1068 break;
1069
1070 default:
1071 return FFI_BAD_ABI;
1072 break;
1073 }
1074 return FFI_OK;
1075 }
1076
1077 static void
1078 flush_icache(char *addr)
1079 {
1080 #ifndef _AIX
1081 __asm__ volatile (
1082 "dcbf 0,%0\n"
1083 "\tsync\n"
1084 "\ticbi 0,%0\n"
1085 "\tsync\n"
1086 "\tisync"
1087 : : "r"(addr) : "memory");
1088 #endif
1089 }
1090
1091 static void
1092 flush_range(char * addr1, int size)
1093 {
1094 #define MIN_LINE_SIZE 32
1095 int i;
1096 for (i = 0; i < size; i += MIN_LINE_SIZE)
1097 flush_icache(addr1+i);
1098 flush_icache(addr1+size-1);
1099 }
1100
1101 typedef union
1102 {
1103 float f;
1104 double d;
1105 } ffi_dblfl;
1106
1107 ffi_type *
1108 ffi_closure_helper_DARWIN (ffi_closure *, void *,
1109 unsigned long *, ffi_dblfl *);
1110
1111 /* Basically the trampoline invokes ffi_closure_ASM, and on
1112 entry, r11 holds the address of the closure.
1113 After storing the registers that could possibly contain
1114 parameters to be passed into the stack frame and setting
1115 up space for a return value, ffi_closure_ASM invokes the
1116 following helper function to do most of the work. */
1117
1118 ffi_type *
1119 ffi_closure_helper_DARWIN (ffi_closure *closure, void *rvalue,
1120 unsigned long *pgr, ffi_dblfl *pfr)
1121 {
1122 /* rvalue is the pointer to space for return value in closure assembly
1123 pgr is the pointer to where r3-r10 are stored in ffi_closure_ASM
1124 pfr is the pointer to where f1-f13 are stored in ffi_closure_ASM. */
1125
1126 typedef double ldbits[2];
1127
1128 union ldu
1129 {
1130 ldbits lb;
1131 long double ld;
1132 };
1133
1134 void ** avalue;
1135 ffi_type ** arg_types;
1136 long i, avn;
1137 ffi_cif * cif;
1138 ffi_dblfl * end_pfr = pfr + NUM_FPR_ARG_REGISTERS;
1139 unsigned size_al;
1140 #if defined(POWERPC_DARWIN64)
1141 unsigned fpsused = 0;
1142 #endif
1143
1144 cif = closure->cif;
1145 avalue = alloca (cif->nargs * sizeof(void *));
1146
1147 if (cif->rtype->type == FFI_TYPE_STRUCT)
1148 {
1149 #if defined(POWERPC_DARWIN64)
1150 if (!darwin64_struct_ret_by_value_p (cif->rtype))
1151 {
1152 /* Won't fit into the regs - return by ref. */
1153 rvalue = (void *) *pgr;
1154 pgr++;
1155 }
1156 #elif defined(DARWIN_PPC)
1157 if (cif->rtype->size > 4)
1158 {
1159 rvalue = (void *) *pgr;
1160 pgr++;
1161 }
1162 #else /* assume we return by ref. */
1163 rvalue = (void *) *pgr;
1164 pgr++;
1165 #endif
1166 }
1167
1168 i = 0;
1169 avn = cif->nargs;
1170 arg_types = cif->arg_types;
1171
1172 /* Grab the addresses of the arguments from the stack frame. */
1173 while (i < avn)
1174 {
1175 switch (arg_types[i]->type)
1176 {
1177 case FFI_TYPE_SINT8:
1178 case FFI_TYPE_UINT8:
1179 #if defined(POWERPC64)
1180 avalue[i] = (char *) pgr + 7;
1181 #else
1182 avalue[i] = (char *) pgr + 3;
1183 #endif
1184 pgr++;
1185 break;
1186
1187 case FFI_TYPE_SINT16:
1188 case FFI_TYPE_UINT16:
1189 #if defined(POWERPC64)
1190 avalue[i] = (char *) pgr + 6;
1191 #else
1192 avalue[i] = (char *) pgr + 2;
1193 #endif
1194 pgr++;
1195 break;
1196
1197 case FFI_TYPE_SINT32:
1198 case FFI_TYPE_UINT32:
1199 #if defined(POWERPC64)
1200 avalue[i] = (char *) pgr + 4;
1201 #else
1202 case FFI_TYPE_POINTER:
1203 avalue[i] = pgr;
1204 #endif
1205 pgr++;
1206 break;
1207
1208 case FFI_TYPE_STRUCT:
1209 size_al = arg_types[i]->size;
1210 #if defined(POWERPC_DARWIN64)
1211 pgr = (unsigned long *)ALIGN((char *)pgr, arg_types[i]->alignment);
1212 if (size_al < 3 || size_al == 4)
1213 {
1214 avalue[i] = ((char *)pgr)+8-size_al;
1215 if (arg_types[i]->elements[0]->type == FFI_TYPE_FLOAT
1216 && fpsused < NUM_FPR_ARG_REGISTERS)
1217 {
1218 *(float *)pgr = (float) *(double *)pfr;
1219 pfr++;
1220 fpsused++;
1221 }
1222 }
1223 else
1224 {
1225 if (size_al != 16)
1226 pfr = (ffi_dblfl *)
1227 darwin64_struct_floats_to_mem (arg_types[i], (char *)pgr,
1228 (double *)pfr, &fpsused);
1229 avalue[i] = pgr;
1230 }
1231 pgr += (size_al + 7) / 8;
1232 #else
1233 /* If the first member of the struct is a double, then align
1234 the struct to double-word. */
1235 if (arg_types[i]->elements[0]->type == FFI_TYPE_DOUBLE)
1236 size_al = ALIGN(arg_types[i]->size, 8);
1237 # if defined(POWERPC64)
1238 FFI_ASSERT (cif->abi != FFI_DARWIN)
1239 avalue[i] = pgr;
1240 pgr += (size_al + 7) / 8;
1241 # else
1242 /* Structures that match the basic modes (QI 1 byte, HI 2 bytes,
1243 SI 4 bytes) are aligned as if they were those modes. */
1244 if (size_al < 3 && cif->abi == FFI_DARWIN)
1245 avalue[i] = (char*) pgr + 4 - size_al;
1246 else
1247 avalue[i] = pgr;
1248 pgr += (size_al + 3) / 4;
1249 # endif
1250 #endif
1251 break;
1252
1253 case FFI_TYPE_SINT64:
1254 case FFI_TYPE_UINT64:
1255 #if defined(POWERPC64)
1256 case FFI_TYPE_POINTER:
1257 avalue[i] = pgr;
1258 pgr++;
1259 break;
1260 #else
1261 /* Long long ints are passed in two gpr's. */
1262 avalue[i] = pgr;
1263 pgr += 2;
1264 break;
1265 #endif
1266
1267 case FFI_TYPE_FLOAT:
1268 /* A float value consumes a GPR.
1269 There are 13 64bit floating point registers. */
1270 if (pfr < end_pfr)
1271 {
1272 double temp = pfr->d;
1273 pfr->f = (float) temp;
1274 avalue[i] = pfr;
1275 pfr++;
1276 }
1277 else
1278 {
1279 avalue[i] = pgr;
1280 }
1281 pgr++;
1282 break;
1283
1284 case FFI_TYPE_DOUBLE:
1285 /* A double value consumes two GPRs.
1286 There are 13 64bit floating point registers. */
1287 if (pfr < end_pfr)
1288 {
1289 avalue[i] = pfr;
1290 pfr++;
1291 }
1292 else
1293 {
1294 avalue[i] = pgr;
1295 }
1296 #ifdef POWERPC64
1297 pgr++;
1298 #else
1299 pgr += 2;
1300 #endif
1301 break;
1302
1303 #if FFI_TYPE_LONGDOUBLE != FFI_TYPE_DOUBLE
1304
1305 case FFI_TYPE_LONGDOUBLE:
1306 #ifdef POWERPC64
1307 if (pfr + 1 < end_pfr)
1308 {
1309 avalue[i] = pfr;
1310 pfr += 2;
1311 }
1312 else
1313 {
1314 if (pfr < end_pfr)
1315 {
1316 *pgr = *(unsigned long *) pfr;
1317 pfr++;
1318 }
1319 avalue[i] = pgr;
1320 }
1321 pgr += 2;
1322 #else /* POWERPC64 */
1323 /* A long double value consumes four GPRs and two FPRs.
1324 There are 13 64bit floating point registers. */
1325 if (pfr + 1 < end_pfr)
1326 {
1327 avalue[i] = pfr;
1328 pfr += 2;
1329 }
1330 /* Here we have the situation where one part of the long double
1331 is stored in fpr13 and the other part is already on the stack.
1332 We use a union to pass the long double to avalue[i]. */
1333 else if (pfr + 1 == end_pfr)
1334 {
1335 union ldu temp_ld;
1336 memcpy (&temp_ld.lb[0], pfr, sizeof(ldbits));
1337 memcpy (&temp_ld.lb[1], pgr + 2, sizeof(ldbits));
1338 avalue[i] = &temp_ld.ld;
1339 pfr++;
1340 }
1341 else
1342 {
1343 avalue[i] = pgr;
1344 }
1345 pgr += 4;
1346 #endif /* POWERPC64 */
1347 break;
1348 #endif
1349 default:
1350 FFI_ASSERT(0);
1351 }
1352 i++;
1353 }
1354
1355 (closure->fun) (cif, rvalue, avalue, closure->user_data);
1356
1357 /* Tell ffi_closure_ASM to perform return type promotions. */
1358 return cif->rtype;
1359 }