1
2 /*
3 * Copyright 2011 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8 #include "Test.h"
9 #include "SkUtils.h"
10
set_zero(void * dst,size_t bytes)11 static void set_zero(void* dst, size_t bytes) {
12 char* ptr = (char*)dst;
13 for (size_t i = 0; i < bytes; ++i) {
14 ptr[i] = 0;
15 }
16 }
17
18 #define MAX_ALIGNMENT 64
19 #define MAX_COUNT ((MAX_ALIGNMENT) * 32)
20 #define PAD 32
21 #define TOTAL (PAD + MAX_ALIGNMENT + MAX_COUNT + PAD)
22
23 #define VALUE16 0x1234
24 #define VALUE32 0x12345678
25
compare16(const uint16_t base[],uint16_t value,int count)26 static bool compare16(const uint16_t base[], uint16_t value, int count) {
27 for (int i = 0; i < count; ++i) {
28 if (base[i] != value) {
29 SkDebugf("[%d] expected %x found %x\n", i, value, base[i]);
30 return false;
31 }
32 }
33 return true;
34 }
35
compare32(const uint32_t base[],uint32_t value,int count)36 static bool compare32(const uint32_t base[], uint32_t value, int count) {
37 for (int i = 0; i < count; ++i) {
38 if (base[i] != value) {
39 SkDebugf("[%d] expected %x found %x\n", i, value, base[i]);
40 return false;
41 }
42 }
43 return true;
44 }
45
test_16(skiatest::Reporter * reporter)46 static void test_16(skiatest::Reporter* reporter) {
47 uint16_t buffer[TOTAL];
48
49 for (int count = 0; count < MAX_COUNT; ++count) {
50 for (int alignment = 0; alignment < MAX_ALIGNMENT; ++alignment) {
51 set_zero(buffer, sizeof(buffer));
52
53 uint16_t* base = &buffer[PAD + alignment];
54 sk_memset16(base, VALUE16, count);
55
56 compare16(buffer, 0, PAD + alignment);
57 compare16(base, VALUE16, count);
58 compare16(base + count, 0, TOTAL - count - PAD - alignment);
59 }
60 }
61 }
62
test_32(skiatest::Reporter * reporter)63 static void test_32(skiatest::Reporter* reporter) {
64 uint32_t buffer[TOTAL];
65
66 for (int count = 0; count < MAX_COUNT; ++count) {
67 for (int alignment = 0; alignment < MAX_ALIGNMENT; ++alignment) {
68 set_zero(buffer, sizeof(buffer));
69
70 uint32_t* base = &buffer[PAD + alignment];
71 sk_memset32(base, VALUE32, count);
72
73 compare32(buffer, 0, PAD + alignment);
74 compare32(base, VALUE32, count);
75 compare32(base + count, 0, TOTAL - count - PAD - alignment);
76 }
77 }
78 }
79
80 /**
81 * Test sk_memset16 and sk_memset32.
82 * For performance considerations, implementations may take different paths
83 * depending on the alignment of the dst, and/or the size of the count.
84 */
TestMemset(skiatest::Reporter * reporter)85 static void TestMemset(skiatest::Reporter* reporter) {
86 test_16(reporter);
87 test_32(reporter);
88 };
89
90 #include "TestClassDef.h"
91 DEFINE_TESTCLASS("Memset", TestMemsetClass, TestMemset)
92