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dtc: Basic integer expressions

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Written by David Gibson <david@gibson.dropbear.id.au>. Additions by me:
* Ported to ToT dtc.
* Renamed cell to integer throughout.
* Implemented value range checks.
* Allow U/L/UL/LL/ULL suffix on literals.
* Enabled the commented test.

Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
This commit is contained in:
Stephen Warren 2012-04-03 20:56:00 -06:00 • committed by Jon Loeliger
parent eaec1dbc59
commit 5f0c3b2d62
5 changed files with 265 additions and 25 deletions
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117
tests/integer-expressions.c Normal file
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/*
* Testcase for dtc expression support
*
* Copyright (C) 2008 David Gibson, IBM Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <errno.h>
#include <fdt.h>
#include <libfdt.h>
#include "tests.h"
#include "testdata.h"
struct test_expr {
const char *expr;
uint32_t result;
} expr_table[] = {
#define TE(expr) { #expr, (expr) }
TE(0xdeadbeef),
TE(-0x21524111),
TE(1+1),
TE(2*3),
TE(4/2),
TE(10/3),
TE(19%4),
TE(1 << 13),
TE(0x1000 >> 4),
TE(3*2+1), TE(3*(2+1)),
TE(1+2*3), TE((1+2)*3),
TE(1 < 2), TE(2 < 1), TE(1 < 1),
TE(1 <= 2), TE(2 <= 1), TE(1 <= 1),
TE(1 > 2), TE(2 > 1), TE(1 > 1),
TE(1 >= 2), TE(2 >= 1), TE(1 >= 1),
TE(1 == 1), TE(1 == 2),
TE(1 != 1), TE(1 != 2),
TE(0xabcdabcd & 0xffff0000),
TE(0xdead4110 ^ 0xf0f0f0f0),
TE(0xabcd0000 | 0x0000abcd),
TE(~0x21524110),
TE(~~0xdeadbeef),
TE(0 && 0), TE(17 && 0), TE(0 && 17), TE(17 && 17),
TE(0 || 0), TE(17 || 0), TE(0 || 17), TE(17 || 17),
TE(!0), TE(!1), TE(!17), TE(!!0), TE(!!17),
TE(0 ? 17 : 39), TE(1 ? 17 : 39), TE(17 ? 0xdeadbeef : 0xabcd1234),
TE(11 * 257 * 1321517ULL),
TE(123456790 - 4/2 + 17%4),
};
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
int main(int argc, char *argv[])
{
void *fdt;
const uint32_t *res;
int reslen;
int i;
test_init(argc, argv);
if ((argc == 3) && (strcmp(argv[1], "-g") == 0)) {
FILE *f = fopen(argv[2], "w");
if (!f)
FAIL("Couldn't open \"%s\" for output: %s\n",
argv[2], strerror(errno));
fprintf(f, "/dts-v1/;\n");
fprintf(f, "/ {\n");
fprintf(f, "\texpressions = <\n");
for (i = 0; i < ARRAY_SIZE(expr_table); i++)
fprintf(f, "\t\t(%s)\n", expr_table[i].expr);
fprintf(f, "\t>;\n");
fprintf(f, "};\n");
fclose(f);
} else {
fdt = load_blob_arg(argc, argv);
res = fdt_getprop(fdt, 0, "expressions", &reslen);
if (!res)
FAIL("Error retreiving expression results: %s\n",
fdt_strerror(reslen));
if (reslen != (ARRAY_SIZE(expr_table) * sizeof(uint32_t)))
FAIL("Unexpected length of results %d instead of %zd\n",
reslen, ARRAY_SIZE(expr_table) * sizeof(uint32_t));
for (i = 0; i < ARRAY_SIZE(expr_table); i++)
if (fdt32_to_cpu(res[i]) != expr_table[i].result)
FAIL("Incorrect result for expression \"%s\","
" 0x%x instead of 0x%x\n",
expr_table[i].expr, fdt32_to_cpu(res[i]),
expr_table[i].result);
}
PASS();
}