forked from Minki/linux
selftests/powerpc: Update memcmp_64 selftest for VMX implementation
This patch reworked selftest memcmp_64 so that memcmp selftest can cover more test cases. It adds testcases for: - memcmp over 4K bytes size. - s1/s2 with different/random offset on 16 bytes boundary. - enter/exit_vmx_ops pairness. Signed-off-by: Simon Guo <wei.guo.simon@gmail.com> [mpe: Add -maltivec to fix build on some toolchains] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Simon Guo
Michael Ellerman
parent
c2a4e54e8b
commit
c827ac450d
@ -36,11 +36,11 @@ FUNC_START(exit_vmx_usercopy)
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li r3,0
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blr
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FUNC_START(enter_vmx_copy)
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FUNC_START(enter_vmx_ops)
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li r3,1
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blr
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FUNC_START(exit_vmx_copy)
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FUNC_START(exit_vmx_ops)
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blr
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FUNC_START(memcpy_power7)
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@ -1,6 +1,6 @@
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# SPDX-License-Identifier: GPL-2.0
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# The loops are all 64-bit code
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CFLAGS += -m64
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CFLAGS += -m64 -maltivec
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CFLAGS += -I$(CURDIR)
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TEST_GEN_PROGS := memcmp
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39
tools/testing/selftests/powerpc/stringloops/asm/ppc-opcode.h
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39
tools/testing/selftests/powerpc/stringloops/asm/ppc-opcode.h
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@ -0,0 +1,39 @@
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/*
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* Copyright 2009 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* provides masks and opcode images for use by code generation, emulation
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* and for instructions that older assemblers might not know about
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*/
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#ifndef _ASM_POWERPC_PPC_OPCODE_H
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#define _ASM_POWERPC_PPC_OPCODE_H
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# define stringify_in_c(...) __VA_ARGS__
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# define ASM_CONST(x) x
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#define PPC_INST_VCMPEQUD_RC 0x100000c7
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#define PPC_INST_VCMPEQUB_RC 0x10000006
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#define __PPC_RC21 (0x1 << 10)
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/* macros to insert fields into opcodes */
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#define ___PPC_RA(a) (((a) & 0x1f) << 16)
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#define ___PPC_RB(b) (((b) & 0x1f) << 11)
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#define ___PPC_RS(s) (((s) & 0x1f) << 21)
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#define ___PPC_RT(t) ___PPC_RS(t)
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#define VCMPEQUD_RC(vrt, vra, vrb) stringify_in_c(.long PPC_INST_VCMPEQUD_RC | \
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___PPC_RT(vrt) | ___PPC_RA(vra) | \
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___PPC_RB(vrb) | __PPC_RC21)
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#define VCMPEQUB_RC(vrt, vra, vrb) stringify_in_c(.long PPC_INST_VCMPEQUB_RC | \
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___PPC_RT(vrt) | ___PPC_RA(vra) | \
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___PPC_RB(vrb) | __PPC_RC21)
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#endif /* _ASM_POWERPC_PPC_OPCODE_H */
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@ -1,4 +1,6 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _PPC_ASM_H
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#define __PPC_ASM_H
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#include <ppc-asm.h>
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#ifndef r1
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@ -6,3 +8,26 @@
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#endif
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#define _GLOBAL(A) FUNC_START(test_ ## A)
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#define _GLOBAL_TOC(A) FUNC_START(test_ ## A)
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#define CONFIG_ALTIVEC
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#define R14 r14
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#define R15 r15
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#define R16 r16
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#define R17 r17
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#define R18 r18
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#define R19 r19
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#define R20 r20
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#define R21 r21
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#define R22 r22
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#define R29 r29
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#define R30 r30
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#define R31 r31
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#define STACKFRAMESIZE 256
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#define STK_REG(i) (112 + ((i)-14)*8)
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#define BEGIN_FTR_SECTION
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#define END_FTR_SECTION_IFSET(val)
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#endif
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@ -2,20 +2,40 @@
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#include <malloc.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include "utils.h"
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#define SIZE 256
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#define ITERATIONS 10000
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#define LARGE_SIZE (5 * 1024)
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#define LARGE_ITERATIONS 1000
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#define LARGE_MAX_OFFSET 32
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#define LARGE_SIZE_START 4096
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#define MAX_OFFSET_DIFF_S1_S2 48
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int vmx_count;
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int enter_vmx_ops(void)
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{
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vmx_count++;
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return 1;
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}
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void exit_vmx_ops(void)
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{
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vmx_count--;
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}
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int test_memcmp(const void *s1, const void *s2, size_t n);
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/* test all offsets and lengths */
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static void test_one(char *s1, char *s2)
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static void test_one(char *s1, char *s2, unsigned long max_offset,
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unsigned long size_start, unsigned long max_size)
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{
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unsigned long offset, size;
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for (offset = 0; offset < SIZE; offset++) {
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for (size = 0; size < (SIZE-offset); size++) {
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for (offset = 0; offset < max_offset; offset++) {
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for (size = size_start; size < (max_size - offset); size++) {
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int x, y;
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unsigned long i;
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@ -35,70 +55,104 @@ static void test_one(char *s1, char *s2)
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printf("\n");
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abort();
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}
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if (vmx_count != 0) {
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printf("vmx enter/exit not paired.(offset:%ld size:%ld s1:%p s2:%p vc:%d\n",
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offset, size, s1, s2, vmx_count);
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printf("\n");
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abort();
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}
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}
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}
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}
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static int testcase(void)
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static int testcase(bool islarge)
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{
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char *s1;
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char *s2;
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unsigned long i;
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s1 = memalign(128, SIZE);
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unsigned long comp_size = (islarge ? LARGE_SIZE : SIZE);
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unsigned long alloc_size = comp_size + MAX_OFFSET_DIFF_S1_S2;
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int iterations = islarge ? LARGE_ITERATIONS : ITERATIONS;
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s1 = memalign(128, alloc_size);
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if (!s1) {
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perror("memalign");
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exit(1);
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}
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s2 = memalign(128, SIZE);
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s2 = memalign(128, alloc_size);
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if (!s2) {
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perror("memalign");
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exit(1);
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}
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srandom(1);
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srandom(time(0));
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for (i = 0; i < ITERATIONS; i++) {
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for (i = 0; i < iterations; i++) {
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unsigned long j;
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unsigned long change;
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char *rand_s1 = s1;
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char *rand_s2 = s2;
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for (j = 0; j < SIZE; j++)
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for (j = 0; j < alloc_size; j++)
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s1[j] = random();
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memcpy(s2, s1, SIZE);
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rand_s1 += random() % MAX_OFFSET_DIFF_S1_S2;
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rand_s2 += random() % MAX_OFFSET_DIFF_S1_S2;
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memcpy(rand_s2, rand_s1, comp_size);
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/* change one byte */
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change = random() % SIZE;
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s2[change] = random() & 0xff;
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change = random() % comp_size;
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rand_s2[change] = random() & 0xff;
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test_one(s1, s2);
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if (islarge)
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test_one(rand_s1, rand_s2, LARGE_MAX_OFFSET,
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LARGE_SIZE_START, comp_size);
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else
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test_one(rand_s1, rand_s2, SIZE, 0, comp_size);
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}
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srandom(1);
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srandom(time(0));
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for (i = 0; i < ITERATIONS; i++) {
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for (i = 0; i < iterations; i++) {
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unsigned long j;
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unsigned long change;
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char *rand_s1 = s1;
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char *rand_s2 = s2;
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for (j = 0; j < SIZE; j++)
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for (j = 0; j < alloc_size; j++)
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s1[j] = random();
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memcpy(s2, s1, SIZE);
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rand_s1 += random() % MAX_OFFSET_DIFF_S1_S2;
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rand_s2 += random() % MAX_OFFSET_DIFF_S1_S2;
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memcpy(rand_s2, rand_s1, comp_size);
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/* change multiple bytes, 1/8 of total */
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for (j = 0; j < SIZE / 8; j++) {
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change = random() % SIZE;
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for (j = 0; j < comp_size / 8; j++) {
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change = random() % comp_size;
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s2[change] = random() & 0xff;
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}
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test_one(s1, s2);
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if (islarge)
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test_one(rand_s1, rand_s2, LARGE_MAX_OFFSET,
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LARGE_SIZE_START, comp_size);
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else
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test_one(rand_s1, rand_s2, SIZE, 0, comp_size);
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}
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return 0;
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}
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static int testcases(void)
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{
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testcase(0);
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testcase(1);
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return 0;
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}
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int main(void)
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{
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return test_harness(testcase, "memcmp");
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return test_harness(testcases, "memcmp");
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}
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