diff options
| -rw-r--r-- | meta/recipes-support/lzo/lzo/0001-Use-memcpy-instead-of-reinventing-it.patch | 70 | ||||
| -rw-r--r-- | meta/recipes-support/lzo/lzo_2.08.bb | 1 |
2 files changed, 71 insertions, 0 deletions
diff --git a/meta/recipes-support/lzo/lzo/0001-Use-memcpy-instead-of-reinventing-it.patch b/meta/recipes-support/lzo/lzo/0001-Use-memcpy-instead-of-reinventing-it.patch new file mode 100644 index 0000000000..db3a70e803 --- /dev/null +++ b/meta/recipes-support/lzo/lzo/0001-Use-memcpy-instead-of-reinventing-it.patch @@ -0,0 +1,70 @@ +From: Simon McVittie <smcv@debian.org> +Date: Sun, 23 Nov 2014 22:50:33 +0000 +Subject: Use memcpy() instead of reinventing it + +gcc inlines memcpy() with results as fast as handwritten code (at +least in my brief testing with lzop), and knows the alignment +constraints for our architectures. + +Change suggested by Julian Taylor. + +Bug-Debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=757037 + +Upstream-Status: Pending +Signed-off-by: Saul Wold <sgw@linux.intel.com> +--- + minilzo/minilzo.c | 14 ++++++++++++++ + src/lzo_func.h | 14 ++++++++++++++ + 2 files changed, 28 insertions(+) + + +diff --git a/minilzo/minilzo.c b/minilzo/minilzo.c +index ab2be5f..6913c2f 100644 +--- a/minilzo/minilzo.c ++++ b/minilzo/minilzo.c +@@ -3523,6 +3523,20 @@ LZO_COMPILE_TIME_ASSERT_HEADER(sizeof(*(lzo_memops_TU8p)0)==8) + if ((void)0, n__n > 0) do { *d__n++ = *s__n++; } while (--n__n > 0); \ + LZO_BLOCK_END + ++/* Debian-specific change: we know that our compiler inlines memcpy() with ++ * constant n to be as fast as handwritten code, and knows which architectures ++ * need things correctly aligned. */ ++#undef LZO_MEMOPS_COPY1 ++#undef LZO_MEMOPS_COPY2 ++#undef LZO_MEMOPS_COPY4 ++#undef LZO_MEMOPS_COPY8 ++#undef LZO_MEMOPS_COPYN ++#define LZO_MEMOPS_COPY1(dd,ss) memcpy(dd, ss, 1) ++#define LZO_MEMOPS_COPY2(dd,ss) memcpy(dd, ss, 2) ++#define LZO_MEMOPS_COPY4(dd,ss) memcpy(dd, ss, 4) ++#define LZO_MEMOPS_COPY8(dd,ss) memcpy(dd, ss, 8) ++#define LZO_MEMOPS_COPYN(dd,ss,nn) memcpy(dd, ss, nn) ++ + __lzo_static_forceinline lzo_uint16_t lzo_memops_get_le16(const lzo_voidp ss) + { + lzo_uint16_t v; +diff --git a/src/lzo_func.h b/src/lzo_func.h +index dfaa676..1cc1b53 100644 +--- a/src/lzo_func.h ++++ b/src/lzo_func.h +@@ -333,6 +333,20 @@ LZO_COMPILE_TIME_ASSERT_HEADER(sizeof(*(lzo_memops_TU8p)0)==8) + if ((void)0, n__n > 0) do { *d__n++ = *s__n++; } while (--n__n > 0); \ + LZO_BLOCK_END + ++/* Debian-specific change: we know that our compiler inlines memcpy() with ++ * constant n to be as fast as handwritten code, and knows which architectures ++ * need things correctly aligned. */ ++#undef LZO_MEMOPS_COPY1 ++#undef LZO_MEMOPS_COPY2 ++#undef LZO_MEMOPS_COPY4 ++#undef LZO_MEMOPS_COPY8 ++#undef LZO_MEMOPS_COPYN ++#define LZO_MEMOPS_COPY1(dd,ss) memcpy(dd, ss, 1) ++#define LZO_MEMOPS_COPY2(dd,ss) memcpy(dd, ss, 2) ++#define LZO_MEMOPS_COPY4(dd,ss) memcpy(dd, ss, 4) ++#define LZO_MEMOPS_COPY8(dd,ss) memcpy(dd, ss, 8) ++#define LZO_MEMOPS_COPYN(dd,ss,nn) memcpy(dd, ss, nn) ++ + __lzo_static_forceinline lzo_uint16_t lzo_memops_get_le16(const lzo_voidp ss) + { + lzo_uint16_t v; diff --git a/meta/recipes-support/lzo/lzo_2.08.bb b/meta/recipes-support/lzo/lzo_2.08.bb index 7d7d1f32ba..af06e29a6f 100644 --- a/meta/recipes-support/lzo/lzo_2.08.bb +++ b/meta/recipes-support/lzo/lzo_2.08.bb @@ -6,6 +6,7 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=b234ee4d69f5fce4486a80fdaf4a4263 \ file://src/lzo_init.c;beginline=5;endline=25;md5=a6e25df9a83b24629e847846ccdd8054" SRC_URI = "http://www.oberhumer.com/opensource/lzo/download/lzo-${PV}.tar.gz \ + file://0001-Use-memcpy-instead-of-reinventing-it.patch \ file://acinclude.m4 \ " |