Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a4aa2e867c5d696c0f249ad8d63d0d983b4ffaf9
Commit: a4aa2e867c5d696c0f249ad8d63d0d983b4ffaf9
Parent: f778089cb2445dfc6dfd30a7a567925fd8589f1e
Author: David S. Miller <[EMAIL PROTECTED]>
AuthorDate: Tue Oct 2 16:17:17 2007 -0700
Committer: David S. Miller <[EMAIL PROTECTED]>
CommitDate: Tue Oct 2 16:17:17 2007 -0700
[SPARC64]: Don't use in/local regs for ldx/stx data in N1 memcpy.
It doesn't matter for use in 64-bit objects, but when used in
32-bit environments the top 32-bits of the local and in
registers will get chopped off on the next register window
spill/restore which leads to difficult to track down and
subtle bugs.
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
---
arch/sparc64/lib/NGmemcpy.S | 8 ++++----
1 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/arch/sparc64/lib/NGmemcpy.S b/arch/sparc64/lib/NGmemcpy.S
index 605cb3f..96a14ca 100644
--- a/arch/sparc64/lib/NGmemcpy.S
+++ b/arch/sparc64/lib/NGmemcpy.S
@@ -321,11 +321,11 @@ FUNC_NAME: /* %i0=dst, %i1=src, %i2=len */
andn %i2, 0xf, %i4
and %i2, 0xf, %i2
1: subcc %i4, 0x10, %i4
- EX_LD(LOAD(ldx, %i1, %i5))
+ EX_LD(LOAD(ldx, %i1, %o4))
add %i1, 0x08, %i1
EX_LD(LOAD(ldx, %i1, %g1))
sub %i1, 0x08, %i1
- EX_ST(STORE(stx, %i5, %i1 + %i3))
+ EX_ST(STORE(stx, %o4, %i1 + %i3))
add %i1, 0x8, %i1
EX_ST(STORE(stx, %g1, %i1 + %i3))
bgu,pt %XCC, 1b
@@ -334,8 +334,8 @@ FUNC_NAME: /* %i0=dst, %i1=src, %i2=len */
be,pt %XCC, 1f
nop
sub %i2, 0x8, %i2
- EX_LD(LOAD(ldx, %i1, %i5))
- EX_ST(STORE(stx, %i5, %i1 + %i3))
+ EX_LD(LOAD(ldx, %i1, %o4))
+ EX_ST(STORE(stx, %o4, %i1 + %i3))
add %i1, 0x8, %i1
1: andcc %i2, 0x4, %g0
be,pt %XCC, 1f
-
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