1 /* Simulate storage of variables into target memory.
3 Free Software Foundation, Inc.
4 Contributed by Paul Thomas and Brooks Moses
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 2, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
31 #include "trans-const.h"
32 #include "trans-types.h"
33 #include "target-memory.h"
35 /* --------------------------------------------------------------- */
36 /* Calculate the size of an expression. */
39 size_array (gfc_expr *e)
42 size_t elt_size = gfc_target_expr_size (e->value.constructor->expr);
44 gfc_array_size (e, &array_size);
45 return (size_t)mpz_get_ui (array_size) * elt_size;
49 size_integer (int kind)
51 return GET_MODE_SIZE (TYPE_MODE (gfc_get_int_type (kind)));;
58 return GET_MODE_SIZE (TYPE_MODE (gfc_get_real_type (kind)));;
63 size_complex (int kind)
65 return 2 * size_float (kind);
70 size_logical (int kind)
72 return GET_MODE_SIZE (TYPE_MODE (gfc_get_logical_type (kind)));;
77 size_character (int length)
84 gfc_target_expr_size (gfc_expr *e)
88 gcc_assert (e != NULL);
90 if (e->expr_type == EXPR_ARRAY)
91 return size_array (e);
96 return size_integer (e->ts.kind);
98 return size_float (e->ts.kind);
100 return size_complex (e->ts.kind);
102 return size_logical (e->ts.kind);
104 return size_character (e->value.character.length);
106 return e->representation.length;
108 type = gfc_typenode_for_spec (&e->ts);
109 return int_size_in_bytes (type);
111 gfc_internal_error ("Invalid expression in gfc_target_expr_size.");
117 /* The encode_* functions export a value into a buffer, and
118 return the number of bytes of the buffer that have been
122 encode_array (gfc_expr *expr, unsigned char *buffer, size_t buffer_size)
128 gfc_array_size (expr, &array_size);
129 for (i = 0; i < (int)mpz_get_ui (array_size); i++)
131 ptr += gfc_target_encode_expr (gfc_get_array_element (expr, i),
132 &buffer[ptr], buffer_size - ptr);
135 mpz_clear (array_size);
141 encode_integer (int kind, mpz_t integer, unsigned char *buffer,
144 return native_encode_expr (gfc_conv_mpz_to_tree (integer, kind),
145 buffer, buffer_size);
150 encode_float (int kind, mpfr_t real, unsigned char *buffer, size_t buffer_size)
152 return native_encode_expr (gfc_conv_mpfr_to_tree (real, kind), buffer,
158 encode_complex (int kind, mpfr_t real, mpfr_t imaginary, unsigned char *buffer,
162 size = encode_float (kind, real, &buffer[0], buffer_size);
163 size += encode_float (kind, imaginary, &buffer[size], buffer_size - size);
169 encode_logical (int kind, int logical, unsigned char *buffer, size_t buffer_size)
171 return native_encode_expr (build_int_cst (gfc_get_logical_type (kind),
173 buffer, buffer_size);
178 encode_character (int length, char *string, unsigned char *buffer,
181 gcc_assert (buffer_size >= size_character (length));
182 memcpy (buffer, string, length);
188 encode_derived (gfc_expr *source, unsigned char *buffer, size_t buffer_size)
190 gfc_constructor *ctr;
195 type = gfc_typenode_for_spec (&source->ts);
197 ctr = source->value.constructor;
198 cmp = source->ts.derived->components;
199 for (;ctr; ctr = ctr->next, cmp = cmp->next)
201 gcc_assert (ctr->expr && cmp);
202 ptr = TREE_INT_CST_LOW (DECL_FIELD_OFFSET (cmp->backend_decl));
203 gfc_target_encode_expr (ctr->expr, &buffer[ptr],
207 return int_size_in_bytes (type);
211 /* Write a constant expression in binary form to a buffer. */
213 gfc_target_encode_expr (gfc_expr *source, unsigned char *buffer,
219 if (source->expr_type == EXPR_ARRAY)
220 return encode_array (source, buffer, buffer_size);
222 gcc_assert (source->expr_type == EXPR_CONSTANT
223 || source->expr_type == EXPR_STRUCTURE);
225 /* If we already have a target-memory representation, we use that rather
226 than recreating one. */
227 if (source->representation.string)
229 memcpy (buffer, source->representation.string,
230 source->representation.length);
231 return source->representation.length;
234 switch (source->ts.type)
237 return encode_integer (source->ts.kind, source->value.integer, buffer,
240 return encode_float (source->ts.kind, source->value.real, buffer,
243 return encode_complex (source->ts.kind, source->value.complex.r,
244 source->value.complex.i, buffer, buffer_size);
246 return encode_logical (source->ts.kind, source->value.logical, buffer,
249 return encode_character (source->value.character.length,
250 source->value.character.string, buffer,
253 return encode_derived (source, buffer, buffer_size);
255 gfc_internal_error ("Invalid expression in gfc_target_encode_expr.");
262 interpret_array (unsigned char *buffer, size_t buffer_size, gfc_expr *result)
267 gfc_constructor *head = NULL, *tail = NULL;
269 /* Calculate array size from its shape and rank. */
270 gcc_assert (result->rank > 0 && result->shape);
272 for (i = 0; i < result->rank; i++)
273 array_size *= (int)mpz_get_ui (result->shape[i]);
275 /* Iterate over array elements, producing constructors. */
276 for (i = 0; i < array_size; i++)
279 head = tail = gfc_get_constructor ();
282 tail->next = gfc_get_constructor ();
286 tail->where = result->where;
287 tail->expr = gfc_constant_result (result->ts.type,
288 result->ts.kind, &result->where);
289 tail->expr->ts = result->ts;
291 if (tail->expr->ts.type == BT_CHARACTER)
292 tail->expr->value.character.length = result->value.character.length;
294 ptr += gfc_target_interpret_expr (&buffer[ptr], buffer_size - ptr,
297 result->value.constructor = head;
304 gfc_interpret_integer (int kind, unsigned char *buffer, size_t buffer_size,
308 gfc_conv_tree_to_mpz (integer,
309 native_interpret_expr (gfc_get_int_type (kind),
310 buffer, buffer_size));
311 return size_integer (kind);
316 gfc_interpret_float (int kind, unsigned char *buffer, size_t buffer_size,
320 gfc_conv_tree_to_mpfr (real,
321 native_interpret_expr (gfc_get_real_type (kind),
322 buffer, buffer_size));
324 return size_float (kind);
329 gfc_interpret_complex (int kind, unsigned char *buffer, size_t buffer_size,
330 mpfr_t real, mpfr_t imaginary)
333 size = gfc_interpret_float (kind, &buffer[0], buffer_size, real);
334 size += gfc_interpret_float (kind, &buffer[size], buffer_size - size, imaginary);
340 gfc_interpret_logical (int kind, unsigned char *buffer, size_t buffer_size,
343 tree t = native_interpret_expr (gfc_get_logical_type (kind), buffer,
345 *logical = double_int_zero_p (tree_to_double_int (t))
347 return size_logical (kind);
352 gfc_interpret_character (unsigned char *buffer, size_t buffer_size, gfc_expr *result)
354 if (result->ts.cl && result->ts.cl->length)
355 result->value.character.length =
356 (int)mpz_get_ui (result->ts.cl->length->value.integer);
358 gcc_assert (buffer_size >= size_character (result->value.character.length));
359 result->value.character.string =
360 gfc_getmem (result->value.character.length + 1);
361 memcpy (result->value.character.string, buffer,
362 result->value.character.length);
363 result->value.character.string [result->value.character.length] = '\0';
365 return result->value.character.length;
370 gfc_interpret_derived (unsigned char *buffer, size_t buffer_size, gfc_expr *result)
373 gfc_constructor *head = NULL, *tail = NULL;
377 /* The attributes of the derived type need to be bolted to the floor. */
378 result->expr_type = EXPR_STRUCTURE;
380 type = gfc_typenode_for_spec (&result->ts);
381 cmp = result->ts.derived->components;
383 /* Run through the derived type components. */
384 for (;cmp; cmp = cmp->next)
387 head = tail = gfc_get_constructor ();
390 tail->next = gfc_get_constructor ();
394 /* The constructor points to the component. */
395 tail->n.component = cmp;
397 tail->expr = gfc_constant_result (cmp->ts.type, cmp->ts.kind,
399 tail->expr->ts = cmp->ts;
401 /* Copy shape, if needed. */
402 if (cmp->as && cmp->as->rank)
406 tail->expr->expr_type = EXPR_ARRAY;
407 tail->expr->rank = cmp->as->rank;
409 tail->expr->shape = gfc_get_shape (tail->expr->rank);
410 for (n = 0; n < tail->expr->rank; n++)
412 mpz_init_set_ui (tail->expr->shape[n], 1);
413 mpz_add (tail->expr->shape[n], tail->expr->shape[n],
414 cmp->as->upper[n]->value.integer);
415 mpz_sub (tail->expr->shape[n], tail->expr->shape[n],
416 cmp->as->lower[n]->value.integer);
420 ptr = TREE_INT_CST_LOW (DECL_FIELD_OFFSET (cmp->backend_decl));
421 gfc_target_interpret_expr (&buffer[ptr], buffer_size - ptr,
424 result->value.constructor = head;
427 return int_size_in_bytes (type);
431 /* Read a binary buffer to a constant expression. */
433 gfc_target_interpret_expr (unsigned char *buffer, size_t buffer_size,
436 if (result->expr_type == EXPR_ARRAY)
437 return interpret_array (buffer, buffer_size, result);
439 switch (result->ts.type)
442 result->representation.length =
443 gfc_interpret_integer (result->ts.kind, buffer, buffer_size,
444 result->value.integer);
448 result->representation.length =
449 gfc_interpret_float (result->ts.kind, buffer, buffer_size,
454 result->representation.length =
455 gfc_interpret_complex (result->ts.kind, buffer, buffer_size,
456 result->value.complex.r,
457 result->value.complex.i);
461 result->representation.length =
462 gfc_interpret_logical (result->ts.kind, buffer, buffer_size,
463 &result->value.logical);
467 result->representation.length =
468 gfc_interpret_character (buffer, buffer_size, result);
472 result->representation.length =
473 gfc_interpret_derived (buffer, buffer_size, result);
477 gfc_internal_error ("Invalid expression in gfc_target_interpret_expr.");
481 if (result->ts.type == BT_CHARACTER)
482 result->representation.string = result->value.character.string;
485 result->representation.string =
486 gfc_getmem (result->representation.length + 1);
487 memcpy (result->representation.string, buffer,
488 result->representation.length);
489 result->representation.string[result->representation.length] = '\0';
492 return result->representation.length;