diff options
author | Anton Blanchard <anton@samba.org> | 2015-01-21 02:27:39 +0100 |
---|---|---|
committer | Michael Ellerman <mpe@ellerman.id.au> | 2015-01-23 06:44:23 +0100 |
commit | 521adf5357105f6f750fbe7bca958fab3b19df2e (patch) | |
tree | 74f9dc6108221b20aa7ded50b1ed47528d1a9538 /tools/testing | |
parent | powerpc: Add 64bit optimised memcmp (diff) | |
download | linux-521adf5357105f6f750fbe7bca958fab3b19df2e.tar.xz linux-521adf5357105f6f750fbe7bca958fab3b19df2e.zip |
selftests/powerpc: Add memcmp testcase
Add a testcase for the new ppc64 memcmp.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'tools/testing')
6 files changed, 133 insertions, 1 deletions
diff --git a/tools/testing/selftests/powerpc/Makefile b/tools/testing/selftests/powerpc/Makefile index f6ff90a76bd7..1d5e7ad2c460 100644 --- a/tools/testing/selftests/powerpc/Makefile +++ b/tools/testing/selftests/powerpc/Makefile @@ -13,7 +13,7 @@ CFLAGS := -Wall -O2 -flto -Wall -Werror -DGIT_VERSION='"$(GIT_VERSION)"' -I$(CUR export CC CFLAGS -TARGETS = pmu copyloops mm tm primitives +TARGETS = pmu copyloops mm tm primitives stringloops endif diff --git a/tools/testing/selftests/powerpc/stringloops/.gitignore b/tools/testing/selftests/powerpc/stringloops/.gitignore new file mode 100644 index 000000000000..0b43da74ee46 --- /dev/null +++ b/tools/testing/selftests/powerpc/stringloops/.gitignore @@ -0,0 +1 @@ +memcmp diff --git a/tools/testing/selftests/powerpc/stringloops/Makefile b/tools/testing/selftests/powerpc/stringloops/Makefile new file mode 100644 index 000000000000..506d77346477 --- /dev/null +++ b/tools/testing/selftests/powerpc/stringloops/Makefile @@ -0,0 +1,20 @@ +# The loops are all 64-bit code +CFLAGS += -m64 +CFLAGS += -I$(CURDIR) + +PROGS := memcmp +EXTRA_SOURCES := memcmp_64.S ../harness.c + +all: $(PROGS) + +$(PROGS): $(EXTRA_SOURCES) + +run_tests: all + @-for PROG in $(PROGS); do \ + ./$$PROG; \ + done; + +clean: + rm -f $(PROGS) *.o + +.PHONY: all run_tests clean diff --git a/tools/testing/selftests/powerpc/stringloops/asm/ppc_asm.h b/tools/testing/selftests/powerpc/stringloops/asm/ppc_asm.h new file mode 100644 index 000000000000..11bece87e880 --- /dev/null +++ b/tools/testing/selftests/powerpc/stringloops/asm/ppc_asm.h @@ -0,0 +1,7 @@ +#include <ppc-asm.h> + +#ifndef r1 +#define r1 sp +#endif + +#define _GLOBAL(A) FUNC_START(test_ ## A) diff --git a/tools/testing/selftests/powerpc/stringloops/memcmp.c b/tools/testing/selftests/powerpc/stringloops/memcmp.c new file mode 100644 index 000000000000..17417dd70708 --- /dev/null +++ b/tools/testing/selftests/powerpc/stringloops/memcmp.c @@ -0,0 +1,103 @@ +#include <malloc.h> +#include <stdlib.h> +#include <string.h> +#include "../utils.h" + +#define SIZE 256 +#define ITERATIONS 10000 + +int test_memcmp(const void *s1, const void *s2, size_t n); + +/* test all offsets and lengths */ +static void test_one(char *s1, char *s2) +{ + unsigned long offset, size; + + for (offset = 0; offset < SIZE; offset++) { + for (size = 0; size < (SIZE-offset); size++) { + int x, y; + unsigned long i; + + y = memcmp(s1+offset, s2+offset, size); + x = test_memcmp(s1+offset, s2+offset, size); + + if (((x ^ y) < 0) && /* Trick to compare sign */ + ((x | y) != 0)) { /* check for zero */ + printf("memcmp returned %d, should have returned %d (offset %ld size %ld)\n", x, y, offset, size); + + for (i = offset; i < offset+size; i++) + printf("%02x ", s1[i]); + printf("\n"); + + for (i = offset; i < offset+size; i++) + printf("%02x ", s2[i]); + printf("\n"); + abort(); + } + } + } +} + +static int testcase(void) +{ + char *s1; + char *s2; + unsigned long i; + + s1 = memalign(128, SIZE); + if (!s1) { + perror("memalign"); + exit(1); + } + + s2 = memalign(128, SIZE); + if (!s2) { + perror("memalign"); + exit(1); + } + + srandom(1); + + for (i = 0; i < ITERATIONS; i++) { + unsigned long j; + unsigned long change; + + for (j = 0; j < SIZE; j++) + s1[j] = random(); + + memcpy(s2, s1, SIZE); + + /* change one byte */ + change = random() % SIZE; + s2[change] = random() & 0xff; + + test_one(s1, s2); + } + + srandom(1); + + for (i = 0; i < ITERATIONS; i++) { + unsigned long j; + unsigned long change; + + for (j = 0; j < SIZE; j++) + s1[j] = random(); + + memcpy(s2, s1, SIZE); + + /* change multiple bytes, 1/8 of total */ + for (j = 0; j < SIZE / 8; j++) { + change = random() % SIZE; + s2[change] = random() & 0xff; + } + + test_one(s1, s2); + } + + return 0; +} + +int main(void) +{ + return test_harness(testcase, "memcmp"); +} diff --git a/tools/testing/selftests/powerpc/stringloops/memcmp_64.S b/tools/testing/selftests/powerpc/stringloops/memcmp_64.S new file mode 120000 index 000000000000..9bc87e438ae9 --- /dev/null +++ b/tools/testing/selftests/powerpc/stringloops/memcmp_64.S @@ -0,0 +1 @@ +../../../../../arch/powerpc/lib/memcmp_64.S
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