1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
--- a/lib/stdfns.c
+++ b/lib/stdfns.c
@@ -152,6 +152,18 @@ mutils_bzero(void *s, __const mutils_wor
}
}
+static void
+mutils_memset8(void *s, __const mutils_word8 c, __const mutils_word32 n)
+{
+ mutils_word8 *stmp = s;
+ mutils_word32 i;
+
+ for (i = 0; i < n; i++, stmp++)
+ {
+ *stmp = c;
+ }
+}
+
WIN32DLL_DEFINE
void
mutils_memset(void *s, __const mutils_word8 c, __const mutils_word32 n)
@@ -160,8 +172,7 @@ mutils_memset(void *s, __const mutils_wo
/* Sparc needs 8-bit alignment - just use standard memset */
memset(s, (int) c, (size_t) n);
#else
- mutils_word8 *stmp;
- mutils_word32 *ltmp = (mutils_word32 *) s;
+ mutils_word32 *ltmp;
mutils_word32 lump;
mutils_word32 i;
mutils_word32 words;
@@ -172,22 +183,30 @@ mutils_memset(void *s, __const mutils_wo
return;
}
+ if (n < 16)
+ {
+ return mutils_memset8(s, c, n);
+ }
+
+ /* unaligned portion at beginning */
+ remainder = (-(mutils_word32)s) & 0x3;
+ mutils_memset8(s, c, remainder);
+
+ /* aligned words in the middle */
+ ltmp = (mutils_word32 *) (s + remainder);
+
lump = (c << 24) + (c << 16) + (c << 8) + c;
- words = n >> 2;
- remainder = n - (words << 2);
+ words = (n - remainder) >> 2;
+ remainder = n - remainder - (words << 2);
for (i = 0; i < words; i++, ltmp++)
{
*ltmp = lump;
}
- stmp = (mutils_word8 *) ltmp;
-
- for (i = 0; i < remainder; i++, stmp++)
- {
- *stmp = c;
- }
+ /* unaligned portion at end */
+ return mutils_memset8(ltmp, c, remainder);
#endif
}
@@ -281,6 +300,9 @@ mutils_word32nswap(mutils_word32 *x, mut
mutils_word32 *buffer;
mutils_word32 *ptrIn;
mutils_word32 *ptrOut;
+ mutils_word8 *ptr8In;
+ mutils_word8 *ptr8Out;
+ mutils_word8 tmp8;
mutils_word32 count = n * 4;
if (destructive == MUTILS_FALSE)
@@ -301,9 +323,35 @@ mutils_word32nswap(mutils_word32 *x, mut
* data on a little-endian machine.
*/
- for (loop = 0, ptrIn = x, ptrOut = buffer; loop < n; loop++, ptrOut++, ptrIn++)
+ if ((mutils_word32)x & 0x3)
+ {
+ ptr8In = (mutils_word8 *) x;
+ ptr8Out = (mutils_word8 *) buffer;
+ for (loop = 0; loop < n; loop++)
+ {
+#ifdef WORDS_BIGENDIAN
+ tmp8 = ptr8In[0];
+ ptr8Out[0] = ptr8In[3];
+ ptr8Out[3] = tmp8;
+ tmp8 = ptr8In[1];
+ ptr8Out[1] = ptr8In[2];
+ ptr8Out[2] = tmp8;
+#else
+ ptr8Out[0] = ptr8In[0];
+ ptr8Out[1] = ptr8In[1];
+ ptr8Out[2] = ptr8In[2];
+ ptr8Out[3] = ptr8In[3];
+#endif
+ ptr8Out += 4;
+ ptr8In += 4;
+ }
+ }
+ else
{
- *ptrOut = mutils_lend32(*ptrIn);
+ for (loop = 0, ptrIn = x, ptrOut = buffer; loop < n; loop++, ptrOut++, ptrIn++)
+ {
+ *ptrOut = mutils_lend32(*ptrIn);
+ }
}
return(buffer);
|
GitWeb