diff options
| author | Waldemar Brodkorb <wbx@uclibc-ng.org> | 2016-05-29 08:53:18 +0200 |
|---|---|---|
| committer | Waldemar Brodkorb <wbx@uclibc-ng.org> | 2016-05-29 08:53:18 +0200 |
| commit | 557f663a8cb7de8cbbfa9ce63b2c956bcaad194c (patch) | |
| tree | 9a00e4e3dbefed4f2382790e4ef40bc7f6c9bde4 | |
| parent | e517397535b0777568fd9c13c4214b63c52d0798 (diff) | |
mips: allow to disable prefetch support in memcpy/memset
There exist some problem with the new memcpy/memset functions
imported from GNU libc/newlib. If you have any problem
with the new MIPS optimized assembly try to disable
prefetching support.
Thanks to Rene Nielsen and Matthew Fortune analyzing the
problem so far.
| -rw-r--r-- | extra/Configs/Config.mips | 7 | ||||
| -rw-r--r-- | libc/string/mips/memcpy.S | 2 | ||||
| -rw-r--r-- | libc/string/mips/memset.S | 2 |
3 files changed, 9 insertions, 2 deletions
diff --git a/extra/Configs/Config.mips b/extra/Configs/Config.mips index e0b62dd67..919e80c59 100644 --- a/extra/Configs/Config.mips +++ b/extra/Configs/Config.mips @@ -31,3 +31,10 @@ config CONFIG_MIPS_N64_ABI bool "N64 ABI" endchoice + +config UCLIBC_USE_MIPS_PREFETCH + bool "Use MIPS prefetch optimization for memcpy/memset" + default y + help + You get better performance when you use Prefetch. + https://gcc.gnu.org/projects/prefetch.html#mips diff --git a/libc/string/mips/memcpy.S b/libc/string/mips/memcpy.S index 59f9f0a3a..3825875f1 100644 --- a/libc/string/mips/memcpy.S +++ b/libc/string/mips/memcpy.S @@ -39,7 +39,7 @@ #if (_MIPS_ISA == _MIPS_ISA_MIPS4) || (_MIPS_ISA == _MIPS_ISA_MIPS5) || \ (_MIPS_ISA == _MIPS_ISA_MIPS32) || (_MIPS_ISA == _MIPS_ISA_MIPS64) -# ifndef DISABLE_PREFETCH +# ifdef __UCLIBC_USE_MIPS_PREFETCH__ # define USE_PREFETCH # endif #endif diff --git a/libc/string/mips/memset.S b/libc/string/mips/memset.S index 43034cebb..1c9f14c8c 100644 --- a/libc/string/mips/memset.S +++ b/libc/string/mips/memset.S @@ -37,7 +37,7 @@ prefetching. */ #if (__mips == 4) || (__mips == 5) || (__mips == 32) || (__mips == 64) -# ifndef DISABLE_PREFETCH +# ifdef __UCLIBC_USE_MIPS_PREFETCH__ # define USE_PREFETCH # endif #endif |