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| author | David S. Miller <davem@davemloft.net> | 2012-09-26 21:11:01 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-09-27 00:35:11 -0700 |
| commit | ae2c6ca64118b934ef85f66adb03d5bbfdd57201 (patch) | |
| tree | 5eb9a50cce32cadd527d5fc92095c76c00b72bae /arch/sparc/lib/NG4copy_from_user.S | |
| parent | da201161662b8ee9c8d7bd8cc50ce3cb3366d400 (diff) | |
| download | op-kernel-dev-ae2c6ca64118b934ef85f66adb03d5bbfdd57201.zip op-kernel-dev-ae2c6ca64118b934ef85f66adb03d5bbfdd57201.tar.gz | |
sparc64: Add SPARC-T4 optimized memcpy.
Before After
-------------- --------------
bw_tcp: 1288.53 MB/sec 1637.77 MB/sec
bw_pipe: 1517.18 MB/sec 2107.61 MB/sec
bw_unix: 1838.38 MB/sec 2640.91 MB/sec
make -s -j128
allmodconfig 5min 49sec 5min 31sec
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/lib/NG4copy_from_user.S')
| -rw-r--r-- | arch/sparc/lib/NG4copy_from_user.S | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/sparc/lib/NG4copy_from_user.S b/arch/sparc/lib/NG4copy_from_user.S new file mode 100644 index 0000000..c8e9830 --- /dev/null +++ b/arch/sparc/lib/NG4copy_from_user.S @@ -0,0 +1,30 @@ +/* NG4copy_from_user.S: Niagara-2 optimized copy from userspace. + * + * Copyright (C) 2012 David S. Miller (davem@davemloft.net) + */ + +#define EX_LD(x) \ +98: x; \ + .section __ex_table,"a";\ + .align 4; \ + .word 98b, __retl_one_asi;\ + .text; \ + .align 4; + +#ifndef ASI_AIUS +#define ASI_AIUS 0x11 +#endif + +#define FUNC_NAME NG4copy_from_user +#define LOAD(type,addr,dest) type##a [addr] %asi, dest +#define EX_RETVAL(x) 0 + +#ifdef __KERNEL__ +#define PREAMBLE \ + rd %asi, %g1; \ + cmp %g1, ASI_AIUS; \ + bne,pn %icc, ___copy_in_user; \ + nop +#endif + +#include "NG4memcpy.S" |
