+++ /dev/null
-/*
- * test-bitfield.c
- *
- * BabelTrace - bitfield test program
- *
- * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; under version 2 of the License.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#define _GNU_SOURCE
-#include <babeltrace/bitfield.h>
-#include <time.h>
-#include <stdlib.h>
-#include <stdio.h>
-
-#include <tap/tap.h>
-
-unsigned int glob;
-
-/*
- * This function is only declared to show the size of a bitfield write in
- * objdump.
- */
-void fct(void)
-{
- bt_bitfield_write(&glob, unsigned int, 12, 15, 0x12345678);
-}
-
-/* Test array size, in bytes */
-#define TEST_LEN 128
-#define NR_TESTS 10
-#define SIGNED_TEST_DESC_FMT_STR "Writing and reading back 0x%X, signed"
-#define UNSIGNED_TEST_DESC_FMT_STR "Writing and reading back 0x%X, unsigned"
-#define DIAG_FMT_STR "Failed reading value written \"%s\"-wise, with start=%i" \
- " and length=%i. Read %llX"
-
-unsigned int srcrand;
-
-#if defined(__i386) || defined(__x86_64)
-
-static inline int fls(int x)
-{
- int r;
- asm("bsrl %1,%0\n\t"
- "cmovzl %2,%0"
- : "=&r" (r) : "rm" (x), "rm" (-1));
- return r + 1;
-}
-
-#elif defined(__PPC__)
-
-static __inline__ int fls(unsigned int x)
-{
- int lz;
-
- asm ("cntlzw %0,%1" : "=r" (lz) : "r" (x));
- return 32 - lz;
-}
-
-#else
-
-static int fls(unsigned int x)
-{
- int r = 32;
-
- if (!x)
- return 0;
- if (!(x & 0xFFFF0000U)) {
- x <<= 16;
- r -= 16;
- }
- if (!(x & 0xFF000000U)) {
- x <<= 8;
- r -= 8;
- }
- if (!(x & 0xF0000000U)) {
- x <<= 4;
- r -= 4;
- }
- if (!(x & 0xC0000000U)) {
- x <<= 2;
- r -= 2;
- }
- if (!(x & 0x80000000U)) {
- x <<= 1;
- r -= 1;
- }
- return r;
-}
-
-#endif
-
-#define print_byte_array(c, len) \
-do { \
- unsigned long i; \
- \
- for (i = 0; i < (len); i++) { \
- printf("0x%X", (c)[i]); \
- if (i != (len) - 1) \
- printf(" "); \
- } \
- printf("\n"); \
-} while (0)
-
-#define init_byte_array(c, len, val) \
-do { \
- unsigned long i; \
- \
- for (i = 0; i < (len); i++) \
- (c)[i] = (val); \
-} while (0)
-
-#define check_result(ref, val, buffer, typename, start, len, \
- desc_fmt_str) \
-({ \
- if ((val) != (ref)) { \
- fail(desc_fmt_str, ref); \
- diag(DIAG_FMT_STR, #typename, start, len, val); \
- printf("# "); \
- print_byte_array(buffer, TEST_LEN); \
- } \
- (val) != (ref); \
-})
-
-void run_test_unsigned(void)
-{
- unsigned int src, nrbits;
- union {
- unsigned char c[TEST_LEN];
- unsigned short s[TEST_LEN/sizeof(unsigned short)];
- unsigned int i[TEST_LEN/sizeof(unsigned int)];
- unsigned long l[TEST_LEN/sizeof(unsigned long)];
- unsigned long long ll[TEST_LEN/sizeof(unsigned long long)];
- } target;
- unsigned long long readval;
- unsigned int s, l;
-
- src = srcrand;
- nrbits = fls(src);
-
- for (s = 0; s < CHAR_BIT * TEST_LEN; s++) {
- for (l = nrbits; l < (CHAR_BIT * TEST_LEN) - s; l++) {
- init_byte_array(target.c, TEST_LEN, 0xFF);
- bt_bitfield_write(target.c, unsigned char, s, l, src);
- bt_bitfield_read(target.c, unsigned char, s, l, &readval);
- if (check_result(src, readval, target.c, unsigned char,
- s, l, UNSIGNED_TEST_DESC_FMT_STR)) {
- return;
- }
-
- init_byte_array(target.c, TEST_LEN, 0xFF);
- bt_bitfield_write(target.s, unsigned short, s, l, src);
- bt_bitfield_read(target.c, unsigned char, s, l, &readval);
- if (check_result(src, readval, target.c, unsigned short,
- s, l, UNSIGNED_TEST_DESC_FMT_STR)) {
- return;
- }
-
- init_byte_array(target.c, TEST_LEN, 0xFF);
- bt_bitfield_write(target.i, unsigned int, s, l, src);
- bt_bitfield_read(target.c, unsigned char, s, l, &readval);
- if (check_result(src, readval, target.c, unsigned int,
- s, l, UNSIGNED_TEST_DESC_FMT_STR)) {
- return;
- }
-
- init_byte_array(target.c, TEST_LEN, 0xFF);
- bt_bitfield_write(target.l, unsigned long, s, l, src);
- bt_bitfield_read(target.c, unsigned char, s, l, &readval);
- if (check_result(src, readval, target.c, unsigned long,
- s, l, UNSIGNED_TEST_DESC_FMT_STR)) {
- return;
- }
-
- init_byte_array(target.c, TEST_LEN, 0xFF);
- bt_bitfield_write(target.ll, unsigned long long, s, l, src);
- bt_bitfield_read(target.c, unsigned char, s, l, &readval);
- if (check_result(src, readval, target.c, unsigned long long,
- s, l, UNSIGNED_TEST_DESC_FMT_STR)) {
- return;
- }
- }
- }
-
- pass(UNSIGNED_TEST_DESC_FMT_STR, src);
-}
-
-void run_test_signed(void)
-{
- int src, nrbits;
- union {
- signed char c[TEST_LEN];
- short s[TEST_LEN/sizeof(short)];
- int i[TEST_LEN/sizeof(int)];
- long l[TEST_LEN/sizeof(long)];
- long long ll[TEST_LEN/sizeof(long long)];
- } target;
- long long readval;
- unsigned int s, l;
-
- src = srcrand;
- if (src & 0x80000000U)
- nrbits = fls(~src) + 1; /* Find least significant bit conveying sign */
- else
- nrbits = fls(src) + 1; /* Keep sign at 0 */
-
- for (s = 0; s < CHAR_BIT * TEST_LEN; s++) {
- for (l = nrbits; l < (CHAR_BIT * TEST_LEN) - s; l++) {
- init_byte_array(target.c, TEST_LEN, 0x0);
- bt_bitfield_write(target.c, signed char, s, l, src);
- bt_bitfield_read(target.c, signed char, s, l, &readval);
- if (check_result(src, readval, target.c, signed char,
- s, l, SIGNED_TEST_DESC_FMT_STR)) {
- return;
- }
-
- init_byte_array(target.c, TEST_LEN, 0x0);
- bt_bitfield_write(target.s, short, s, l, src);
- bt_bitfield_read(target.c, signed char, s, l, &readval);
- if (check_result(src, readval, target.c, short,
- s, l, SIGNED_TEST_DESC_FMT_STR)) {
- return;
- }
-
- init_byte_array(target.c, TEST_LEN, 0x0);
- bt_bitfield_write(target.i, int, s, l, src);
- bt_bitfield_read(target.c, signed char, s, l, &readval);
- if (check_result(src, readval, target.c, int,
- s, l, SIGNED_TEST_DESC_FMT_STR)) {
- return;
- }
-
- init_byte_array(target.c, TEST_LEN, 0x0);
- bt_bitfield_write(target.l, long, s, l, src);
- bt_bitfield_read(target.c, signed char, s, l, &readval);
- if (check_result(src, readval, target.c, long,
- s, l, SIGNED_TEST_DESC_FMT_STR)) {
- return;
- }
-
- init_byte_array(target.c, TEST_LEN, 0x0);
- bt_bitfield_write(target.ll, long long, s, l, src);
- bt_bitfield_read(target.c, signed char, s, l, &readval);
- if (check_result(src, readval, target.c, long long,
- s, l, SIGNED_TEST_DESC_FMT_STR)) {
- return;
- }
- }
- }
-
- pass(SIGNED_TEST_DESC_FMT_STR, src);
-}
-
-void run_test(void)
-{
- int i;
- plan_tests(NR_TESTS * 2 + 6);
-
- srand(time(NULL));
-
- srcrand = 0;
- run_test_unsigned();
- srcrand = 0;
- run_test_signed();
-
- srcrand = 1;
- run_test_unsigned();
-
- srcrand = ~0U;
- run_test_unsigned();
-
- srcrand = -1;
- run_test_signed();
-
- srcrand = (int)0x80000000U;
- run_test_signed();
-
- for (i = 0; i < NR_TESTS; i++) {
- srcrand = rand();
- run_test_unsigned();
- run_test_signed();
- }
-}
-
-static
-int print_encodings(unsigned long src, unsigned int shift, unsigned int len)
-{
- union {
- unsigned char c[8];
- unsigned short s[4];
- unsigned int i[2];
- unsigned long l[2];
- unsigned long long ll[1];
- } target;
- unsigned long long readval;
-
- init_byte_array(target.c, 8, 0xFF);
- bt_bitfield_write(target.c, unsigned char, shift, len, src);
- printf("bytewise\n");
- print_byte_array(target.c, 8);
-
- init_byte_array(target.c, 8, 0xFF);
- bt_bitfield_write(target.s, unsigned short, shift, len, src);
- printf("shortwise\n");
- print_byte_array(target.c, 8);
-
- init_byte_array(target.c, 8, 0xFF);
- bt_bitfield_write(target.i, unsigned int, shift, len, src);
- printf("intwise\n");
- print_byte_array(target.c, 8);
-
- init_byte_array(target.c, 8, 0xFF);
- bt_bitfield_write(target.l, unsigned long, shift, len, src);
- printf("longwise\n");
- print_byte_array(target.c, 8);
-
- init_byte_array(target.c, 8, 0xFF);
- bt_bitfield_write(target.ll, unsigned long long, shift, len, src);
- printf("lluwise\n");
- print_byte_array(target.c, 8);
-
- bt_bitfield_read(target.c, unsigned char, shift, len, &readval);
- printf("read: %llX\n", readval);
- print_byte_array(target.c, 8);
-
- return 0;
-}
-
-int main(int argc, char **argv)
-{
- if (argc > 1) {
- /* Print encodings */
- unsigned long src;
- unsigned int shift, len;
-
- src = atoi(argv[1]);
- if (argc > 2)
- shift = atoi(argv[2]);
- else
- shift = 12;
- if (argc > 3)
- len = atoi(argv[3]);
- else
- len = 40;
- return print_encodings(src, shift, len);
- }
-
- /* Run tap-formated tests */
- run_test();
- return exit_status();
-}
projects / babeltrace.git / blobdiff