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| author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-10-21 05:38:24 +0000 |
|---|---|---|
| committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2012-10-21 05:38:24 +0000 |
| commit | d7f2428afb540539a14827ecb2d757329acb71c9 (patch) | |
| tree | 3c9da87356041eb924bad896997acbc8e421fcd5 /nuttx/configs | |
| parent | 1c8f16b1684773cc2b47867b9224154fba1dc1ac (diff) | |
| download | px4-nuttx-d7f2428afb540539a14827ecb2d757329acb71c9.tar.gz px4-nuttx-d7f2428afb540539a14827ecb2d757329acb71c9.tar.bz2 px4-nuttx-d7f2428afb540539a14827ecb2d757329acb71c9.zip | |
Minor tweaks to memset
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5245 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/configs')
| -rw-r--r-- | nuttx/configs/README.txt | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/nuttx/configs/README.txt b/nuttx/configs/README.txt index 9714b0228..c7f3db0e7 100644 --- a/nuttx/configs/README.txt +++ b/nuttx/configs/README.txt @@ -625,8 +625,9 @@ defconfig -- This is a configuration file similar to the Linux Vik's optimized implementation of memcpy(): CONFIG_MEMCPY_VIK - Select this option to use the optimized memcpy() - function by Daniel Vik. See licensing information in the top-level - COPYING file. Default: n + function by Daniel Vik. Select this option for improved performance + at the expense of increased size. See licensing information in the + top-level COPYING file. Default: n And if CONFIG_MEMCPY_VIK is selected, the following tuning options are available: @@ -636,7 +637,8 @@ defconfig -- This is a configuration file similar to the Linux CONFIG_MEMCPY_INDEXED_COPY - Copying data using array indexing. Using this option, disables the CONFIG_MEMCPY_PRE_INC_PTRS option. - CONFIG_MEMCPY_64BIT - Compiles memcpy for 64 bit architectures + CONFIG_MEMCPY_64BIT - Compiles memcpy for architectures that suppport + 64-bit operations efficiently. If CONFIG_ARCH_MEMSET is not selected, then the following option is also available: @@ -647,7 +649,8 @@ defconfig -- This is a configuration file similar to the Linux And if CONFIG_MEMSET_OPTSPEED is selected, the following tuning option is available: - CONFIG_MEMSET_64BIT - Compiles memset() for 64 bit architectures + CONFIG_MEMSET_64BIT - Compiles memset() for architectures that suppport + 64-bit operations efficiently. The architecture may provide custom versions of certain standard header files: |