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 type = gfc_typenode_for_spec (&e->ts);
107 return int_size_in_bytes (type);
109 gfc_internal_error ("Invalid expression in gfc_target_expr_size.");
115 /* The encode_* functions export a value into a buffer, and
116 return the number of bytes of the buffer that have been
120 encode_array (gfc_expr *expr, unsigned char *buffer, size_t buffer_size)
126 gfc_array_size (expr, &array_size);
127 for (i = 0; i < (int)mpz_get_ui (array_size); i++)
129 ptr += gfc_target_encode_expr (gfc_get_array_element (expr, i),
130 &buffer[ptr], buffer_size - ptr);
133 mpz_clear (array_size);
139 encode_integer (int kind, mpz_t integer, unsigned char *buffer,
142 return native_encode_expr (gfc_conv_mpz_to_tree (integer, kind),
143 buffer, buffer_size);
148 encode_float (int kind, mpfr_t real, unsigned char *buffer, size_t buffer_size)
150 return native_encode_expr (gfc_conv_mpfr_to_tree (real, kind), buffer,
156 encode_complex (int kind, mpfr_t real, mpfr_t imaginary, unsigned char *buffer,
160 size = encode_float (kind, real, &buffer[0], buffer_size);
161 size += encode_float (kind, imaginary, &buffer[size], buffer_size - size);
167 encode_logical (int kind, int logical, unsigned char *buffer, size_t buffer_size)
169 return native_encode_expr (build_int_cst (gfc_get_logical_type (kind),
171 buffer, buffer_size);
176 encode_character (int length, char *string, unsigned char *buffer,
179 gcc_assert (buffer_size >= size_character (length));
180 memcpy (buffer, string, length);
186 encode_derived (gfc_expr *source, unsigned char *buffer, size_t buffer_size)
188 gfc_constructor *ctr;
193 type = gfc_typenode_for_spec (&source->ts);
195 ctr = source->value.constructor;
196 cmp = source->ts.derived->components;
197 for (;ctr; ctr = ctr->next, cmp = cmp->next)
199 gcc_assert (ctr->expr && cmp);
200 ptr = TREE_INT_CST_LOW (DECL_FIELD_OFFSET (cmp->backend_decl));
201 gfc_target_encode_expr (ctr->expr, &buffer[ptr],
205 return int_size_in_bytes (type);
209 /* Write a constant expression in binary form to a buffer. */
211 gfc_target_encode_expr (gfc_expr *source, unsigned char *buffer,
217 if (source->expr_type == EXPR_ARRAY)
218 return encode_array (source, buffer, buffer_size);
220 gcc_assert (source->expr_type == EXPR_CONSTANT
221 || source->expr_type == EXPR_STRUCTURE);
223 switch (source->ts.type)
226 return encode_integer (source->ts.kind, source->value.integer, buffer,
229 return encode_float (source->ts.kind, source->value.real, buffer,
232 return encode_complex (source->ts.kind, source->value.complex.r,
233 source->value.complex.i, buffer, buffer_size);
235 return encode_logical (source->ts.kind, source->value.logical, buffer,
238 return encode_character (source->value.character.length,
239 source->value.character.string, buffer,
242 return encode_derived (source, buffer, buffer_size);
244 gfc_internal_error ("Invalid expression in gfc_target_encode_expr.");
251 interpret_array (unsigned char *buffer, size_t buffer_size, gfc_expr *result)
256 gfc_constructor *head = NULL, *tail = NULL;
258 /* Calculate array size from its shape and rank. */
259 gcc_assert (result->rank > 0 && result->shape);
261 for (i = 0; i < result->rank; i++)
262 array_size *= (int)mpz_get_ui (result->shape[i]);
264 /* Iterate over array elements, producing constructors. */
265 for (i = 0; i < array_size; i++)
268 head = tail = gfc_get_constructor ();
271 tail->next = gfc_get_constructor ();
275 tail->where = result->where;
276 tail->expr = gfc_constant_result (result->ts.type,
277 result->ts.kind, &result->where);
278 tail->expr->ts = result->ts;
280 if (tail->expr->ts.type == BT_CHARACTER)
281 tail->expr->value.character.length = result->value.character.length;
283 ptr += gfc_target_interpret_expr (&buffer[ptr], buffer_size - ptr,
286 result->value.constructor = head;
293 interpret_integer (int kind, unsigned char *buffer, size_t buffer_size,
297 gfc_conv_tree_to_mpz (integer,
298 native_interpret_expr (gfc_get_int_type (kind),
299 buffer, buffer_size));
300 return size_integer (kind);
305 interpret_float (int kind, unsigned char *buffer, size_t buffer_size,
309 gfc_conv_tree_to_mpfr (real,
310 native_interpret_expr (gfc_get_real_type (kind),
311 buffer, buffer_size));
313 return size_float (kind);
318 interpret_complex (int kind, unsigned char *buffer, size_t buffer_size,
319 mpfr_t real, mpfr_t imaginary)
322 size = interpret_float (kind, &buffer[0], buffer_size, real);
323 size += interpret_float (kind, &buffer[size], buffer_size - size, imaginary);
329 interpret_logical (int kind, unsigned char *buffer, size_t buffer_size,
332 tree t = native_interpret_expr (gfc_get_logical_type (kind), buffer,
334 *logical = double_int_zero_p (tree_to_double_int (t))
336 return size_logical (kind);
341 interpret_character (unsigned char *buffer, size_t buffer_size, gfc_expr *result)
343 if (result->ts.cl && result->ts.cl->length)
344 result->value.character.length =
345 (int)mpz_get_ui (result->ts.cl->length->value.integer);
347 gcc_assert (buffer_size >= size_character (result->value.character.length));
348 result->value.character.string =
349 gfc_getmem (result->value.character.length + 1);
350 memcpy (result->value.character.string, buffer,
351 result->value.character.length);
352 result->value.character.string [result->value.character.length] = '\0';
354 return result->value.character.length;
359 interpret_derived (unsigned char *buffer, size_t buffer_size, gfc_expr *result)
362 gfc_constructor *head = NULL, *tail = NULL;
366 /* The attributes of the derived type need to be bolted to the floor. */
367 result->expr_type = EXPR_STRUCTURE;
369 type = gfc_typenode_for_spec (&result->ts);
370 cmp = result->ts.derived->components;
372 /* Run through the derived type components. */
373 for (;cmp; cmp = cmp->next)
376 head = tail = gfc_get_constructor ();
379 tail->next = gfc_get_constructor ();
383 /* The constructor points to the component. */
384 tail->n.component = cmp;
386 tail->expr = gfc_constant_result (cmp->ts.type, cmp->ts.kind,
388 tail->expr->ts = cmp->ts;
390 /* Copy shape, if needed. */
391 if (cmp->as && cmp->as->rank)
395 tail->expr->expr_type = EXPR_ARRAY;
396 tail->expr->rank = cmp->as->rank;
398 tail->expr->shape = gfc_get_shape (tail->expr->rank);
399 for (n = 0; n < tail->expr->rank; n++)
401 mpz_init_set_ui (tail->expr->shape[n], 1);
402 mpz_add (tail->expr->shape[n], tail->expr->shape[n],
403 cmp->as->upper[n]->value.integer);
404 mpz_sub (tail->expr->shape[n], tail->expr->shape[n],
405 cmp->as->lower[n]->value.integer);
409 ptr = TREE_INT_CST_LOW (DECL_FIELD_OFFSET (cmp->backend_decl));
410 gfc_target_interpret_expr (&buffer[ptr], buffer_size - ptr,
413 result->value.constructor = head;
416 return int_size_in_bytes (type);
420 /* Read a binary buffer to a constant expression. */
422 gfc_target_interpret_expr (unsigned char *buffer, size_t buffer_size,
425 if (result->expr_type == EXPR_ARRAY)
426 return interpret_array (buffer, buffer_size, result);
428 switch (result->ts.type)
431 return interpret_integer (result->ts.kind, buffer, buffer_size,
432 result->value.integer);
434 return interpret_float (result->ts.kind, buffer, buffer_size,
437 return interpret_complex (result->ts.kind, buffer, buffer_size,
438 result->value.complex.r,
439 result->value.complex.i);
441 return interpret_logical (result->ts.kind, buffer, buffer_size,
442 &result->value.logical);
444 return interpret_character (buffer, buffer_size, result);
446 return interpret_derived (buffer, buffer_size, result);
448 gfc_internal_error ("Invalid expression in gfc_target_interpret_expr.");