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Commit 521adf53 authored by Anton Blanchard's avatar Anton Blanchard Committed by Michael Ellerman
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selftests/powerpc: Add memcmp testcase 



Add a testcase for the new ppc64 memcmp.

Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 15c2d45d

tools/testing/selftests/powerpc/Makefile

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@@ -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

tools/testing/selftests/powerpc/stringloops/.gitignore

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memcmp

tools/testing/selftests/powerpc/stringloops/Makefile

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# 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

tools/testing/selftests/powerpc/stringloops/asm/ppc_asm.h

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#include <ppc-asm.h>



#ifndef r1

#define r1 sp

#endif



#define _GLOBAL(A) FUNC_START(test_ ## A)

tools/testing/selftests/powerpc/stringloops/memcmp.c

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#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");

}