Anthony Green | c6dddbd | 2009-10-04 08:11:33 -0400 | [diff] [blame^] | 1 | /* ----------------------------------------------------------------------- |
| 2 | ffi.c - Copyright (c) 1998, 2007, 2008 Red Hat, Inc. |
| 3 | Copyright (c) 2000 Hewlett Packard Company |
| 4 | |
| 5 | IA64 Foreign Function Interface |
| 6 | |
| 7 | Permission is hereby granted, free of charge, to any person obtaining |
| 8 | a copy of this software and associated documentation files (the |
| 9 | ``Software''), to deal in the Software without restriction, including |
| 10 | without limitation the rights to use, copy, modify, merge, publish, |
| 11 | distribute, sublicense, and/or sell copies of the Software, and to |
| 12 | permit persons to whom the Software is furnished to do so, subject to |
| 13 | the following conditions: |
| 14 | |
| 15 | The above copyright notice and this permission notice shall be included |
| 16 | in all copies or substantial portions of the Software. |
| 17 | |
| 18 | THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, |
| 19 | EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 20 | MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 21 | NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT |
| 22 | HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| 23 | WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 24 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 25 | DEALINGS IN THE SOFTWARE. |
| 26 | ----------------------------------------------------------------------- */ |
| 27 | |
| 28 | #include <ffi.h> |
| 29 | #include <ffi_common.h> |
| 30 | |
| 31 | #include <stdlib.h> |
| 32 | #include <stdbool.h> |
| 33 | #include <float.h> |
| 34 | |
| 35 | #include "ia64_flags.h" |
| 36 | |
| 37 | /* A 64-bit pointer value. In LP64 mode, this is effectively a plain |
| 38 | pointer. In ILP32 mode, it's a pointer that's been extended to |
| 39 | 64 bits by "addp4". */ |
| 40 | typedef void *PTR64 __attribute__((mode(DI))); |
| 41 | |
| 42 | /* Memory image of fp register contents. This is the implementation |
| 43 | specific format used by ldf.fill/stf.spill. All we care about is |
| 44 | that it wants a 16 byte aligned slot. */ |
| 45 | typedef struct |
| 46 | { |
| 47 | UINT64 x[2] __attribute__((aligned(16))); |
| 48 | } fpreg; |
| 49 | |
| 50 | |
| 51 | /* The stack layout given to ffi_call_unix and ffi_closure_unix_inner. */ |
| 52 | |
| 53 | struct ia64_args |
| 54 | { |
| 55 | fpreg fp_regs[8]; /* Contents of 8 fp arg registers. */ |
| 56 | UINT64 gp_regs[8]; /* Contents of 8 gp arg registers. */ |
| 57 | UINT64 other_args[]; /* Arguments passed on stack, variable size. */ |
| 58 | }; |
| 59 | |
| 60 | |
| 61 | /* Adjust ADDR, a pointer to an 8 byte slot, to point to the low LEN bytes. */ |
| 62 | |
| 63 | static inline void * |
| 64 | endian_adjust (void *addr, size_t len) |
| 65 | { |
| 66 | #ifdef __BIG_ENDIAN__ |
| 67 | return addr + (8 - len); |
| 68 | #else |
| 69 | return addr; |
| 70 | #endif |
| 71 | } |
| 72 | |
| 73 | /* Store VALUE to ADDR in the current cpu implementation's fp spill format. |
| 74 | This is a macro instead of a function, so that it works for all 3 floating |
| 75 | point types without type conversions. Type conversion to long double breaks |
| 76 | the denorm support. */ |
| 77 | |
| 78 | #define stf_spill(addr, value) \ |
| 79 | asm ("stf.spill %0 = %1%P0" : "=m" (*addr) : "f"(value)); |
| 80 | |
| 81 | /* Load a value from ADDR, which is in the current cpu implementation's |
| 82 | fp spill format. As above, this must also be a macro. */ |
| 83 | |
| 84 | #define ldf_fill(result, addr) \ |
| 85 | asm ("ldf.fill %0 = %1%P1" : "=f"(result) : "m"(*addr)); |
| 86 | |
| 87 | /* Return the size of the C type associated with with TYPE. Which will |
| 88 | be one of the FFI_IA64_TYPE_HFA_* values. */ |
| 89 | |
| 90 | static size_t |
| 91 | hfa_type_size (int type) |
| 92 | { |
| 93 | switch (type) |
| 94 | { |
| 95 | case FFI_IA64_TYPE_HFA_FLOAT: |
| 96 | return sizeof(float); |
| 97 | case FFI_IA64_TYPE_HFA_DOUBLE: |
| 98 | return sizeof(double); |
| 99 | case FFI_IA64_TYPE_HFA_LDOUBLE: |
| 100 | return sizeof(__float80); |
| 101 | default: |
| 102 | abort (); |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | /* Load from ADDR a value indicated by TYPE. Which will be one of |
| 107 | the FFI_IA64_TYPE_HFA_* values. */ |
| 108 | |
| 109 | static void |
| 110 | hfa_type_load (fpreg *fpaddr, int type, void *addr) |
| 111 | { |
| 112 | switch (type) |
| 113 | { |
| 114 | case FFI_IA64_TYPE_HFA_FLOAT: |
| 115 | stf_spill (fpaddr, *(float *) addr); |
| 116 | return; |
| 117 | case FFI_IA64_TYPE_HFA_DOUBLE: |
| 118 | stf_spill (fpaddr, *(double *) addr); |
| 119 | return; |
| 120 | case FFI_IA64_TYPE_HFA_LDOUBLE: |
| 121 | stf_spill (fpaddr, *(__float80 *) addr); |
| 122 | return; |
| 123 | default: |
| 124 | abort (); |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | /* Load VALUE into ADDR as indicated by TYPE. Which will be one of |
| 129 | the FFI_IA64_TYPE_HFA_* values. */ |
| 130 | |
| 131 | static void |
| 132 | hfa_type_store (int type, void *addr, fpreg *fpaddr) |
| 133 | { |
| 134 | switch (type) |
| 135 | { |
| 136 | case FFI_IA64_TYPE_HFA_FLOAT: |
| 137 | { |
| 138 | float result; |
| 139 | ldf_fill (result, fpaddr); |
| 140 | *(float *) addr = result; |
| 141 | break; |
| 142 | } |
| 143 | case FFI_IA64_TYPE_HFA_DOUBLE: |
| 144 | { |
| 145 | double result; |
| 146 | ldf_fill (result, fpaddr); |
| 147 | *(double *) addr = result; |
| 148 | break; |
| 149 | } |
| 150 | case FFI_IA64_TYPE_HFA_LDOUBLE: |
| 151 | { |
| 152 | __float80 result; |
| 153 | ldf_fill (result, fpaddr); |
| 154 | *(__float80 *) addr = result; |
| 155 | break; |
| 156 | } |
| 157 | default: |
| 158 | abort (); |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | /* Is TYPE a struct containing floats, doubles, or extended doubles, |
| 163 | all of the same fp type? If so, return the element type. Return |
| 164 | FFI_TYPE_VOID if not. */ |
| 165 | |
| 166 | static int |
| 167 | hfa_element_type (ffi_type *type, int nested) |
| 168 | { |
| 169 | int element = FFI_TYPE_VOID; |
| 170 | |
| 171 | switch (type->type) |
| 172 | { |
| 173 | case FFI_TYPE_FLOAT: |
| 174 | /* We want to return VOID for raw floating-point types, but the |
| 175 | synthetic HFA type if we're nested within an aggregate. */ |
| 176 | if (nested) |
| 177 | element = FFI_IA64_TYPE_HFA_FLOAT; |
| 178 | break; |
| 179 | |
| 180 | case FFI_TYPE_DOUBLE: |
| 181 | /* Similarly. */ |
| 182 | if (nested) |
| 183 | element = FFI_IA64_TYPE_HFA_DOUBLE; |
| 184 | break; |
| 185 | |
| 186 | case FFI_TYPE_LONGDOUBLE: |
| 187 | /* Similarly, except that that HFA is true for double extended, |
| 188 | but not quad precision. Both have sizeof == 16, so tell the |
| 189 | difference based on the precision. */ |
| 190 | if (LDBL_MANT_DIG == 64 && nested) |
| 191 | element = FFI_IA64_TYPE_HFA_LDOUBLE; |
| 192 | break; |
| 193 | |
| 194 | case FFI_TYPE_STRUCT: |
| 195 | { |
| 196 | ffi_type **ptr = &type->elements[0]; |
| 197 | |
| 198 | for (ptr = &type->elements[0]; *ptr ; ptr++) |
| 199 | { |
| 200 | int sub_element = hfa_element_type (*ptr, 1); |
| 201 | if (sub_element == FFI_TYPE_VOID) |
| 202 | return FFI_TYPE_VOID; |
| 203 | |
| 204 | if (element == FFI_TYPE_VOID) |
| 205 | element = sub_element; |
| 206 | else if (element != sub_element) |
| 207 | return FFI_TYPE_VOID; |
| 208 | } |
| 209 | } |
| 210 | break; |
| 211 | |
| 212 | default: |
| 213 | return FFI_TYPE_VOID; |
| 214 | } |
| 215 | |
| 216 | return element; |
| 217 | } |
| 218 | |
| 219 | |
| 220 | /* Perform machine dependent cif processing. */ |
| 221 | |
| 222 | ffi_status |
| 223 | ffi_prep_cif_machdep(ffi_cif *cif) |
| 224 | { |
| 225 | int flags; |
| 226 | |
| 227 | /* Adjust cif->bytes to include space for the bits of the ia64_args frame |
| 228 | that preceeds the integer register portion. The estimate that the |
| 229 | generic bits did for the argument space required is good enough for the |
| 230 | integer component. */ |
| 231 | cif->bytes += offsetof(struct ia64_args, gp_regs[0]); |
| 232 | if (cif->bytes < sizeof(struct ia64_args)) |
| 233 | cif->bytes = sizeof(struct ia64_args); |
| 234 | |
| 235 | /* Set the return type flag. */ |
| 236 | flags = cif->rtype->type; |
| 237 | switch (cif->rtype->type) |
| 238 | { |
| 239 | case FFI_TYPE_LONGDOUBLE: |
| 240 | /* Leave FFI_TYPE_LONGDOUBLE as meaning double extended precision, |
| 241 | and encode quad precision as a two-word integer structure. */ |
| 242 | if (LDBL_MANT_DIG != 64) |
| 243 | flags = FFI_IA64_TYPE_SMALL_STRUCT | (16 << 8); |
| 244 | break; |
| 245 | |
| 246 | case FFI_TYPE_STRUCT: |
| 247 | { |
| 248 | size_t size = cif->rtype->size; |
| 249 | int hfa_type = hfa_element_type (cif->rtype, 0); |
| 250 | |
| 251 | if (hfa_type != FFI_TYPE_VOID) |
| 252 | { |
| 253 | size_t nelts = size / hfa_type_size (hfa_type); |
| 254 | if (nelts <= 8) |
| 255 | flags = hfa_type | (size << 8); |
| 256 | } |
| 257 | else |
| 258 | { |
| 259 | if (size <= 32) |
| 260 | flags = FFI_IA64_TYPE_SMALL_STRUCT | (size << 8); |
| 261 | } |
| 262 | } |
| 263 | break; |
| 264 | |
| 265 | default: |
| 266 | break; |
| 267 | } |
| 268 | cif->flags = flags; |
| 269 | |
| 270 | return FFI_OK; |
| 271 | } |
| 272 | |
| 273 | extern int ffi_call_unix (struct ia64_args *, PTR64, void (*)(void), UINT64); |
| 274 | |
| 275 | void |
| 276 | ffi_call(ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue) |
| 277 | { |
| 278 | struct ia64_args *stack; |
| 279 | long i, avn, gpcount, fpcount; |
| 280 | ffi_type **p_arg; |
| 281 | |
| 282 | FFI_ASSERT (cif->abi == FFI_UNIX); |
| 283 | |
| 284 | /* If we have no spot for a return value, make one. */ |
| 285 | if (rvalue == NULL && cif->rtype->type != FFI_TYPE_VOID) |
| 286 | rvalue = alloca (cif->rtype->size); |
| 287 | |
| 288 | /* Allocate the stack frame. */ |
| 289 | stack = alloca (cif->bytes); |
| 290 | |
| 291 | gpcount = fpcount = 0; |
| 292 | avn = cif->nargs; |
| 293 | for (i = 0, p_arg = cif->arg_types; i < avn; i++, p_arg++) |
| 294 | { |
| 295 | switch ((*p_arg)->type) |
| 296 | { |
| 297 | case FFI_TYPE_SINT8: |
| 298 | stack->gp_regs[gpcount++] = *(SINT8 *)avalue[i]; |
| 299 | break; |
| 300 | case FFI_TYPE_UINT8: |
| 301 | stack->gp_regs[gpcount++] = *(UINT8 *)avalue[i]; |
| 302 | break; |
| 303 | case FFI_TYPE_SINT16: |
| 304 | stack->gp_regs[gpcount++] = *(SINT16 *)avalue[i]; |
| 305 | break; |
| 306 | case FFI_TYPE_UINT16: |
| 307 | stack->gp_regs[gpcount++] = *(UINT16 *)avalue[i]; |
| 308 | break; |
| 309 | case FFI_TYPE_SINT32: |
| 310 | stack->gp_regs[gpcount++] = *(SINT32 *)avalue[i]; |
| 311 | break; |
| 312 | case FFI_TYPE_UINT32: |
| 313 | stack->gp_regs[gpcount++] = *(UINT32 *)avalue[i]; |
| 314 | break; |
| 315 | case FFI_TYPE_SINT64: |
| 316 | case FFI_TYPE_UINT64: |
| 317 | stack->gp_regs[gpcount++] = *(UINT64 *)avalue[i]; |
| 318 | break; |
| 319 | |
| 320 | case FFI_TYPE_POINTER: |
| 321 | stack->gp_regs[gpcount++] = (UINT64)(PTR64) *(void **)avalue[i]; |
| 322 | break; |
| 323 | |
| 324 | case FFI_TYPE_FLOAT: |
| 325 | if (gpcount < 8 && fpcount < 8) |
| 326 | stf_spill (&stack->fp_regs[fpcount++], *(float *)avalue[i]); |
| 327 | stack->gp_regs[gpcount++] = *(UINT32 *)avalue[i]; |
| 328 | break; |
| 329 | |
| 330 | case FFI_TYPE_DOUBLE: |
| 331 | if (gpcount < 8 && fpcount < 8) |
| 332 | stf_spill (&stack->fp_regs[fpcount++], *(double *)avalue[i]); |
| 333 | stack->gp_regs[gpcount++] = *(UINT64 *)avalue[i]; |
| 334 | break; |
| 335 | |
| 336 | case FFI_TYPE_LONGDOUBLE: |
| 337 | if (gpcount & 1) |
| 338 | gpcount++; |
| 339 | if (LDBL_MANT_DIG == 64 && gpcount < 8 && fpcount < 8) |
| 340 | stf_spill (&stack->fp_regs[fpcount++], *(__float80 *)avalue[i]); |
| 341 | memcpy (&stack->gp_regs[gpcount], avalue[i], 16); |
| 342 | gpcount += 2; |
| 343 | break; |
| 344 | |
| 345 | case FFI_TYPE_STRUCT: |
| 346 | { |
| 347 | size_t size = (*p_arg)->size; |
| 348 | size_t align = (*p_arg)->alignment; |
| 349 | int hfa_type = hfa_element_type (*p_arg, 0); |
| 350 | |
| 351 | FFI_ASSERT (align <= 16); |
| 352 | if (align == 16 && (gpcount & 1)) |
| 353 | gpcount++; |
| 354 | |
| 355 | if (hfa_type != FFI_TYPE_VOID) |
| 356 | { |
| 357 | size_t hfa_size = hfa_type_size (hfa_type); |
| 358 | size_t offset = 0; |
| 359 | size_t gp_offset = gpcount * 8; |
| 360 | |
| 361 | while (fpcount < 8 |
| 362 | && offset < size |
| 363 | && gp_offset < 8 * 8) |
| 364 | { |
| 365 | hfa_type_load (&stack->fp_regs[fpcount], hfa_type, |
| 366 | avalue[i] + offset); |
| 367 | offset += hfa_size; |
| 368 | gp_offset += hfa_size; |
| 369 | fpcount += 1; |
| 370 | } |
| 371 | } |
| 372 | |
| 373 | memcpy (&stack->gp_regs[gpcount], avalue[i], size); |
| 374 | gpcount += (size + 7) / 8; |
| 375 | } |
| 376 | break; |
| 377 | |
| 378 | default: |
| 379 | abort (); |
| 380 | } |
| 381 | } |
| 382 | |
| 383 | ffi_call_unix (stack, rvalue, fn, cif->flags); |
| 384 | } |
| 385 | |
| 386 | /* Closures represent a pair consisting of a function pointer, and |
| 387 | some user data. A closure is invoked by reinterpreting the closure |
| 388 | as a function pointer, and branching to it. Thus we can make an |
| 389 | interpreted function callable as a C function: We turn the |
| 390 | interpreter itself, together with a pointer specifying the |
| 391 | interpreted procedure, into a closure. |
| 392 | |
| 393 | For IA64, function pointer are already pairs consisting of a code |
| 394 | pointer, and a gp pointer. The latter is needed to access global |
| 395 | variables. Here we set up such a pair as the first two words of |
| 396 | the closure (in the "trampoline" area), but we replace the gp |
| 397 | pointer with a pointer to the closure itself. We also add the real |
| 398 | gp pointer to the closure. This allows the function entry code to |
| 399 | both retrieve the user data, and to restire the correct gp pointer. */ |
| 400 | |
| 401 | extern void ffi_closure_unix (); |
| 402 | |
| 403 | ffi_status |
| 404 | ffi_prep_closure_loc (ffi_closure* closure, |
| 405 | ffi_cif* cif, |
| 406 | void (*fun)(ffi_cif*,void*,void**,void*), |
| 407 | void *user_data, |
| 408 | void *codeloc) |
| 409 | { |
| 410 | /* The layout of a function descriptor. A C function pointer really |
| 411 | points to one of these. */ |
| 412 | struct ia64_fd |
| 413 | { |
| 414 | UINT64 code_pointer; |
| 415 | UINT64 gp; |
| 416 | }; |
| 417 | |
| 418 | struct ffi_ia64_trampoline_struct |
| 419 | { |
| 420 | UINT64 code_pointer; /* Pointer to ffi_closure_unix. */ |
| 421 | UINT64 fake_gp; /* Pointer to closure, installed as gp. */ |
| 422 | UINT64 real_gp; /* Real gp value. */ |
| 423 | }; |
| 424 | |
| 425 | struct ffi_ia64_trampoline_struct *tramp; |
| 426 | struct ia64_fd *fd; |
| 427 | |
| 428 | FFI_ASSERT (cif->abi == FFI_UNIX); |
| 429 | |
| 430 | tramp = (struct ffi_ia64_trampoline_struct *)closure->tramp; |
| 431 | fd = (struct ia64_fd *)(void *)ffi_closure_unix; |
| 432 | |
| 433 | tramp->code_pointer = fd->code_pointer; |
| 434 | tramp->real_gp = fd->gp; |
| 435 | tramp->fake_gp = (UINT64)(PTR64)codeloc; |
| 436 | closure->cif = cif; |
| 437 | closure->user_data = user_data; |
| 438 | closure->fun = fun; |
| 439 | |
| 440 | return FFI_OK; |
| 441 | } |
| 442 | |
| 443 | |
| 444 | UINT64 |
| 445 | ffi_closure_unix_inner (ffi_closure *closure, struct ia64_args *stack, |
| 446 | void *rvalue, void *r8) |
| 447 | { |
| 448 | ffi_cif *cif; |
| 449 | void **avalue; |
| 450 | ffi_type **p_arg; |
| 451 | long i, avn, gpcount, fpcount; |
| 452 | |
| 453 | cif = closure->cif; |
| 454 | avn = cif->nargs; |
| 455 | avalue = alloca (avn * sizeof (void *)); |
| 456 | |
| 457 | /* If the structure return value is passed in memory get that location |
| 458 | from r8 so as to pass the value directly back to the caller. */ |
| 459 | if (cif->flags == FFI_TYPE_STRUCT) |
| 460 | rvalue = r8; |
| 461 | |
| 462 | gpcount = fpcount = 0; |
| 463 | for (i = 0, p_arg = cif->arg_types; i < avn; i++, p_arg++) |
| 464 | { |
| 465 | switch ((*p_arg)->type) |
| 466 | { |
| 467 | case FFI_TYPE_SINT8: |
| 468 | case FFI_TYPE_UINT8: |
| 469 | avalue[i] = endian_adjust(&stack->gp_regs[gpcount++], 1); |
| 470 | break; |
| 471 | case FFI_TYPE_SINT16: |
| 472 | case FFI_TYPE_UINT16: |
| 473 | avalue[i] = endian_adjust(&stack->gp_regs[gpcount++], 2); |
| 474 | break; |
| 475 | case FFI_TYPE_SINT32: |
| 476 | case FFI_TYPE_UINT32: |
| 477 | avalue[i] = endian_adjust(&stack->gp_regs[gpcount++], 4); |
| 478 | break; |
| 479 | case FFI_TYPE_SINT64: |
| 480 | case FFI_TYPE_UINT64: |
| 481 | avalue[i] = &stack->gp_regs[gpcount++]; |
| 482 | break; |
| 483 | case FFI_TYPE_POINTER: |
| 484 | avalue[i] = endian_adjust(&stack->gp_regs[gpcount++], sizeof(void*)); |
| 485 | break; |
| 486 | |
| 487 | case FFI_TYPE_FLOAT: |
| 488 | if (gpcount < 8 && fpcount < 8) |
| 489 | { |
| 490 | fpreg *addr = &stack->fp_regs[fpcount++]; |
| 491 | float result; |
| 492 | avalue[i] = addr; |
| 493 | ldf_fill (result, addr); |
| 494 | *(float *)addr = result; |
| 495 | } |
| 496 | else |
| 497 | avalue[i] = endian_adjust(&stack->gp_regs[gpcount], 4); |
| 498 | gpcount++; |
| 499 | break; |
| 500 | |
| 501 | case FFI_TYPE_DOUBLE: |
| 502 | if (gpcount < 8 && fpcount < 8) |
| 503 | { |
| 504 | fpreg *addr = &stack->fp_regs[fpcount++]; |
| 505 | double result; |
| 506 | avalue[i] = addr; |
| 507 | ldf_fill (result, addr); |
| 508 | *(double *)addr = result; |
| 509 | } |
| 510 | else |
| 511 | avalue[i] = &stack->gp_regs[gpcount]; |
| 512 | gpcount++; |
| 513 | break; |
| 514 | |
| 515 | case FFI_TYPE_LONGDOUBLE: |
| 516 | if (gpcount & 1) |
| 517 | gpcount++; |
| 518 | if (LDBL_MANT_DIG == 64 && gpcount < 8 && fpcount < 8) |
| 519 | { |
| 520 | fpreg *addr = &stack->fp_regs[fpcount++]; |
| 521 | __float80 result; |
| 522 | avalue[i] = addr; |
| 523 | ldf_fill (result, addr); |
| 524 | *(__float80 *)addr = result; |
| 525 | } |
| 526 | else |
| 527 | avalue[i] = &stack->gp_regs[gpcount]; |
| 528 | gpcount += 2; |
| 529 | break; |
| 530 | |
| 531 | case FFI_TYPE_STRUCT: |
| 532 | { |
| 533 | size_t size = (*p_arg)->size; |
| 534 | size_t align = (*p_arg)->alignment; |
| 535 | int hfa_type = hfa_element_type (*p_arg, 0); |
| 536 | |
| 537 | FFI_ASSERT (align <= 16); |
| 538 | if (align == 16 && (gpcount & 1)) |
| 539 | gpcount++; |
| 540 | |
| 541 | if (hfa_type != FFI_TYPE_VOID) |
| 542 | { |
| 543 | size_t hfa_size = hfa_type_size (hfa_type); |
| 544 | size_t offset = 0; |
| 545 | size_t gp_offset = gpcount * 8; |
| 546 | void *addr = alloca (size); |
| 547 | |
| 548 | avalue[i] = addr; |
| 549 | |
| 550 | while (fpcount < 8 |
| 551 | && offset < size |
| 552 | && gp_offset < 8 * 8) |
| 553 | { |
| 554 | hfa_type_store (hfa_type, addr + offset, |
| 555 | &stack->fp_regs[fpcount]); |
| 556 | offset += hfa_size; |
| 557 | gp_offset += hfa_size; |
| 558 | fpcount += 1; |
| 559 | } |
| 560 | |
| 561 | if (offset < size) |
| 562 | memcpy (addr + offset, (char *)stack->gp_regs + gp_offset, |
| 563 | size - offset); |
| 564 | } |
| 565 | else |
| 566 | avalue[i] = &stack->gp_regs[gpcount]; |
| 567 | |
| 568 | gpcount += (size + 7) / 8; |
| 569 | } |
| 570 | break; |
| 571 | |
| 572 | default: |
| 573 | abort (); |
| 574 | } |
| 575 | } |
| 576 | |
| 577 | closure->fun (cif, rvalue, avalue, closure->user_data); |
| 578 | |
| 579 | return cif->flags; |
| 580 | } |