250 lines
6.4 KiB
C
250 lines
6.4 KiB
C
/*
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* Copyright (c) 2008 Travis Geiselbrecht
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <debug.h>
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#include <string.h>
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#include <malloc.h>
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#include <app.h>
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#include <platform.h>
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#include <kernel/thread.h>
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static uint8_t *src;
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static uint8_t *dst;
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static uint8_t *src2;
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static uint8_t *dst2;
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#define BUFFER_SIZE (1024*1024)
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#define ITERATIONS 16
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extern void *mymemcpy(void *dst, const void *src, size_t len);
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extern void *mymemset(void *dst, int c, size_t len);
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static void *null_memcpy(void *dst, const void *src, size_t len)
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{
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return dst;
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}
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static time_t bench_memcpy_routine(void *memcpy_routine(void *, const void *, size_t), size_t srcalign, size_t dstalign)
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{
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int i;
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time_t t0;
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t0 = current_time();
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for (i=0; i < ITERATIONS; i++) {
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memcpy_routine(dst + dstalign, src + srcalign, BUFFER_SIZE);
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}
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return current_time() - t0;
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}
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static void bench_memcpy(void)
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{
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time_t null, libc, mine;
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size_t srcalign, dstalign;
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printf("memcpy speed test\n");
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thread_sleep(200); // let the debug string clear the serial port
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for (srcalign = 0; srcalign < 64; ) {
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for (dstalign = 0; dstalign < 64; ) {
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null = bench_memcpy_routine(&null_memcpy, srcalign, dstalign);
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libc = bench_memcpy_routine(&memcpy, srcalign, dstalign);
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mine = bench_memcpy_routine(&mymemcpy, srcalign, dstalign);
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printf("srcalign %lu, dstalign %lu\n", srcalign, dstalign);
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printf(" null memcpy %u msecs\n", null);
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printf(" libc memcpy %u msecs, %llu bytes/sec\n", libc, BUFFER_SIZE * ITERATIONS * 1000ULL / libc);
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printf(" my memcpy %u msecs, %llu bytes/sec\n", mine, BUFFER_SIZE * ITERATIONS * 1000ULL / mine);
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if (dstalign == 0)
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dstalign = 1;
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else
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dstalign <<= 1;
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}
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if (srcalign == 0)
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srcalign = 1;
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else
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srcalign <<= 1;
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}
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}
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static void fillbuf(void *ptr, size_t len, uint32_t seed)
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{
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size_t i;
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for (i = 0; i < len; i++) {
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((char *)ptr)[i] = seed;
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seed *= 0x1234567;
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}
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}
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static void validate_memcpy(void)
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{
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size_t srcalign, dstalign, size;
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const size_t maxsize = 256;
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printf("testing memcpy for correctness\n");
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/*
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* do the simple tests to make sure that memcpy doesn't color outside
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* the lines for all alignment cases
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*/
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for (srcalign = 0; srcalign < 64; srcalign++) {
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for (dstalign = 0; dstalign < 64; dstalign++) {
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// printf("srcalign %zu, dstalign %zu\n", srcalign, dstalign);
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for (size = 0; size < maxsize; size++) {
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// printf("srcalign %zu, dstalign %zu, size %zu\n", srcalign, dstalign, size);
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fillbuf(src, maxsize * 2, 567);
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fillbuf(src2, maxsize * 2, 567);
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fillbuf(dst, maxsize * 2, 123514);
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fillbuf(dst2, maxsize * 2, 123514);
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memcpy(dst + dstalign, src + srcalign, size);
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mymemcpy(dst2 + dstalign, src2 + srcalign, size);
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int comp = memcmp(dst, dst2, maxsize * 2);
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if (comp != 0) {
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printf("error! srcalign %zu, dstalign %zu, size %zu\n", srcalign, dstalign, size);
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}
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}
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}
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}
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}
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static time_t bench_memset_routine(void *memset_routine(void *, int, size_t), size_t dstalign)
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{
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int i;
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time_t t0;
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t0 = current_time();
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for (i=0; i < ITERATIONS; i++) {
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memset_routine(dst + dstalign, 0, BUFFER_SIZE);
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}
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return current_time() - t0;
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}
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static void bench_memset(void)
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{
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time_t libc, mine;
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size_t dstalign;
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printf("memset speed test\n");
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thread_sleep(200); // let the debug string clear the serial port
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for (dstalign = 0; dstalign < 64; dstalign++) {
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libc = bench_memset_routine(&memset, dstalign);
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mine = bench_memset_routine(&mymemset, dstalign);
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printf("dstalign %lu\n", dstalign);
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printf(" libc memset %u msecs, %llu bytes/sec\n", libc, BUFFER_SIZE * ITERATIONS * 1000ULL / libc);
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printf(" my memset %u msecs, %llu bytes/sec\n", mine, BUFFER_SIZE * ITERATIONS * 1000ULL / mine);
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}
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}
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static void validate_memset(void)
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{
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size_t dstalign, size;
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int c;
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const size_t maxsize = 256;
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printf("testing memset for correctness\n");
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for (dstalign = 0; dstalign < 64; dstalign++) {
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printf("align %zd\n", dstalign);
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for (size = 0; size < maxsize; size++) {
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for (c = 0; c < 256; c++) {
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fillbuf(dst, maxsize * 2, 123514);
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fillbuf(dst2, maxsize * 2, 123514);
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memset(dst + dstalign, c, size);
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mymemset(dst2 + dstalign, c, size);
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int comp = memcmp(dst, dst2, maxsize * 2);
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if (comp != 0) {
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printf("error! align %zu, c %d, size %zu\n", dstalign, c, size);
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}
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}
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}
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}
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}
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#if defined(WITH_LIB_CONSOLE)
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#include <lib/console.h>
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static int string_tests(int argc, cmd_args *argv)
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{
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src = memalign(64, BUFFER_SIZE + 256);
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dst = memalign(64, BUFFER_SIZE + 256);
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src2 = memalign(64, BUFFER_SIZE + 256);
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dst2 = memalign(64, BUFFER_SIZE + 256);
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printf("src %p, dst %p\n", src, dst);
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printf("src2 %p, dst2 %p\n", src2, dst2);
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if (argc < 3) {
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printf("not enough arguments:\n");
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usage:
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printf("%s validate <routine>\n", argv[0].str);
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printf("%s bench <routine>\n", argv[0].str);
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goto out;
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}
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if (!strcmp(argv[1].str, "validate")) {
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if (!strcmp(argv[2].str, "memcpy")) {
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validate_memcpy();
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} else if (!strcmp(argv[2].str, "memset")) {
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validate_memset();
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}
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} else if (!strcmp(argv[1].str, "bench")) {
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if (!strcmp(argv[2].str, "memcpy")) {
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bench_memcpy();
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} else if (!strcmp(argv[2].str, "memset")) {
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bench_memset();
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}
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} else {
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goto usage;
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}
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out:
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free(src);
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free(dst);
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free(src2);
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free(dst2);
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return 0;
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}
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STATIC_COMMAND_START
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{ "string", NULL, &string_tests },
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STATIC_COMMAND_END(stringtests);
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#endif
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APP_START(stringtests)
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APP_END
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