diff options
Diffstat (limited to 'package/compcache/patches/001-lzo-speed.patch')
| -rw-r--r-- | package/compcache/patches/001-lzo-speed.patch | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/package/compcache/patches/001-lzo-speed.patch b/package/compcache/patches/001-lzo-speed.patch new file mode 100644 index 000000000..130f79da6 --- /dev/null +++ b/package/compcache/patches/001-lzo-speed.patch @@ -0,0 +1,181 @@ +--- a/sub-projects/compression/lzo-kmod/lzo1x_compress.c ++++ b/sub-projects/compression/lzo-kmod/lzo1x_compress.c +@@ -62,8 +62,12 @@ _lzo1x_1_do_compress(const unsigned char + 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 @@ match: + } + *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 @@ int lzo1x_1_compress(const unsigned char + + *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 @@ EXPORT_SYMBOL_GPL(lzo1x_1_compress); + + MODULE_LICENSE("GPL"); + MODULE_DESCRIPTION("LZO1X-1 Compressor"); +- +--- a/sub-projects/compression/lzo-kmod/lzo1x_decompress.c ++++ b/sub-projects/compression/lzo-kmod/lzo1x_decompress.c +@@ -45,10 +45,7 @@ int lzo1x_decompress_safe(const unsigned + 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)) { +@@ -71,30 +68,27 @@ int lzo1x_decompress_safe(const unsigned + 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); + } + } + +-first_literal_run: ++//first_literal_run: + t = *ip++; + if (t >= 16) + goto match; +@@ -139,8 +133,7 @@ match: + 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 @@ match: + } + 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 @@ match: + 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++; |