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diff -uNr compcache-0.5/sub-projects/compression/lzo-kmod/lzo1x_compress.c compcache-0.5/sub-projects/compression/lzo-kmod/lzo1x_compress.c
--- compcache-0.5/sub-projects/compression/lzo-kmod/lzo1x_compress.c 2008-08-13 06:33:34.000000000 +0200
+++ compcache-0.5/sub-projects/compression/lzo-kmod/lzo1x_compress.c 2009-01-21 08:00:35.000000000 +0100
@@ -62,8 +62,12 @@
goto literal;
try_match:
+#ifdef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
if (get_unaligned((const unsigned short *)m_pos)
== get_unaligned((const unsigned short *)ip)) {
+#else
+ if (m_pos[0] == ip[0] && m_pos[1] == ip[1]) {
+#endif
if (likely(m_pos[2] == ip[2]))
goto match;
}
@@ -94,9 +98,14 @@
}
*op++ = tt;
}
- do {
- *op++ = *ii++;
- } while (--t > 0);
+ if (t >= 2 * 4) {
+ memcpy(op, ii, t);
+ op += t;
+ ii += t;
+ } else
+ do {
+ *op++ = *ii++;
+ } while (--t > 0);
}
ip += 3;
@@ -208,9 +217,14 @@
*op++ = tt;
}
- do {
- *op++ = *ii++;
- } while (--t > 0);
+ if (t >= 2 * 4) {
+ memcpy(op, ii, t);
+ op += t;
+ ii += t;
+ } else
+ do {
+ *op++ = *ii++;
+ } while (--t > 0);
}
*op++ = M4_MARKER | 1;
@@ -224,4 +238,3 @@
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("LZO1X-1 Compressor");
-
diff -uNr compcache-0.5/sub-projects/compression/lzo-kmod/lzo1x_decompress.c compcache-0.5/sub-projects/compression/lzo-kmod/lzo1x_decompress.c
--- compcache-0.5/sub-projects/compression/lzo-kmod/lzo1x_decompress.c 2008-08-13 06:33:42.000000000 +0200
+++ compcache-0.5/sub-projects/compression/lzo-kmod/lzo1x_decompress.c 2009-01-21 07:49:41.000000000 +0100
@@ -45,10 +45,7 @@
goto output_overrun;
if (HAVE_IP(t + 1, ip_end, ip))
goto input_overrun;
- do {
- *op++ = *ip++;
- } while (--t > 0);
- goto first_literal_run;
+ goto prep_first_literal_run;
}
while ((ip < ip_end)) {
@@ -71,23 +68,20 @@
if (HAVE_IP(t + 4, ip_end, ip))
goto input_overrun;
- COPY4(op, ip);
- op += 4;
- ip += 4;
- if (--t > 0) {
- if (t >= 4) {
- do {
- COPY4(op, ip);
- op += 4;
- ip += 4;
- t -= 4;
- } while (t >= 4);
- if (t > 0) {
- do {
- *op++ = *ip++;
- } while (--t > 0);
- }
- } else {
+ t += (4 - 1);
+ if (t >= 2 * 4) {
+ memcpy(op, ip, t);
+ op += t;
+ ip += t;
+ } else {
+ do {
+ COPY4(op, ip);
+ op += 4;
+ ip += 4;
+ t -= 4;
+ } while (t >= 4);
+ if (t > 0) {
+prep_first_literal_run:
do {
*op++ = *ip++;
} while (--t > 0);
@@ -139,8 +133,7 @@
t += 31 + *ip++;
}
m_pos = op - 1;
- m_pos -= le16_to_cpu(get_unaligned(
- (const unsigned short *)ip)) >> 2;
+ m_pos -= get_unaligned_le16(ip) >> 2;
ip += 2;
} else if (t >= 16) {
m_pos = op;
@@ -158,8 +151,7 @@
}
t += 7 + *ip++;
}
- m_pos -= le16_to_cpu(get_unaligned(
- (const unsigned short *)ip)) >> 2;
+ m_pos -= get_unaligned_le16(ip) >> 2;
ip += 2;
if (m_pos == op)
goto eof_found;
@@ -184,21 +176,33 @@
if (HAVE_OP(t + 3 - 1, op_end, op))
goto output_overrun;
- if (t >= 2 * 4 - (3 - 1) && (op - m_pos) >= 4) {
- COPY4(op, m_pos);
- op += 4;
- m_pos += 4;
- t -= 4 - (3 - 1);
- do {
+ if (t >= 2 * 4 - (3 - 1)) {
+ /*
+ * Assume memcpy don't copy
+ * more than 32 bytes at once
+ */
+ if ((op - m_pos) >= 32) {
+ t += (3 - 1);
+ memcpy(op, m_pos, t);
+ op += t;
+ m_pos += t;
+ } else if ((op - m_pos) >= 4) {
COPY4(op, m_pos);
op += 4;
m_pos += 4;
- t -= 4;
- } while (t >= 4);
- if (t > 0)
+ t -= 4 - (3 - 1);
do {
- *op++ = *m_pos++;
- } while (--t > 0);
+ COPY4(op, m_pos);
+ op += 4;
+ m_pos += 4;
+ t -= 4;
+ } while (t >= 4);
+ if (t > 0)
+ do {
+ *op++ = *m_pos++;
+ } while (--t > 0);
+ } else
+ goto copy_match;
} else {
copy_match:
*op++ = *m_pos++;
@@ -247,9 +251,7 @@
*out_len = op - out;
return LZO_E_LOOKBEHIND_OVERRUN;
}
-
EXPORT_SYMBOL_GPL(lzo1x_decompress_safe);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("LZO1X Decompressor");
-
|
