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