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Kirill Smelkov
linux
Commits
df06c27e
Commit
df06c27e
authored
Jul 14, 2020
by
Al Viro
Browse files
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sparc32: switch __bzero() away from range exception table entries
Signed-off-by:
Al Viro
<
viro@zeniv.linux.org.uk
>
parent
5f99d338
Changes
1
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Showing
1 changed file
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32 additions
and
40 deletions
+32
-40
arch/sparc/lib/memset.S
arch/sparc/lib/memset.S
+32
-40
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arch/sparc/lib/memset.S
View file @
df06c27e
...
@@ -27,35 +27,44 @@
...
@@ -27,35 +27,44 @@
.
text
; \
.
text
; \
.
align
4
.
align
4
#define EXT(start,end,handler) \
#define STORE(source, base, offset, n) \
98
:
std
source
,
[
base
+
offset
+
n
]
; \
.
section
.
fixup
,
ALLOC
,
EXECINSTR
; \
.
align
4
; \
99
:
ba
30
f
; \
sub
%
o3
,
n
-
offset
,
%
o3
; \
.
section
__ex_table
,
ALLOC
; \
.
section
__ex_table
,
ALLOC
; \
.
align
4
; \
.
align
4
; \
.
word
start
,
0
,
end
,
handler
;
\
.
word
98
b
,
99
b
;
\
.
text
; \
.
text
; \
.
align
4
.
align
4
;
#define STORE_LAST(source, base, offset, n) \
EX
(
std
source
,
[
base
-
offset
-
n
],
\
add
%
o1
,
offset
+
n
)
;
/*
Please
don
't change these macros, unless you change the logic
/*
Please
don
't change these macros, unless you change the logic
*
in
the
.
fixup
section
below
as
well
.
*
in
the
.
fixup
section
below
as
well
.
*
Store
64
bytes
at
(
BASE
+
OFFSET
)
using
value
SOURCE
.
*/
*
Store
64
bytes
at
(
BASE
+
OFFSET
)
using
value
SOURCE
.
*/
#define ZERO_BIG_BLOCK(base, offset, source) \
#define ZERO_BIG_BLOCK(base, offset, source) \
std
source
,
[
base
+
offset
+
0x00
]
;
\
STORE
(
source
,
base
,
offset
,
0x00
)
;
\
std
source
,
[
base
+
offset
+
0x08
]
;
\
STORE
(
source
,
base
,
offset
,
0x08
)
;
\
std
source
,
[
base
+
offset
+
0x10
]
;
\
STORE
(
source
,
base
,
offset
,
0x10
)
;
\
std
source
,
[
base
+
offset
+
0x18
]
;
\
STORE
(
source
,
base
,
offset
,
0x18
)
;
\
std
source
,
[
base
+
offset
+
0x20
]
;
\
STORE
(
source
,
base
,
offset
,
0x20
)
;
\
std
source
,
[
base
+
offset
+
0x28
]
;
\
STORE
(
source
,
base
,
offset
,
0x28
)
;
\
std
source
,
[
base
+
offset
+
0x30
]
;
\
STORE
(
source
,
base
,
offset
,
0x30
)
;
\
std
source
,
[
base
+
offset
+
0x38
]
;
STORE
(
source
,
base
,
offset
,
0x38
)
;
#define ZERO_LAST_BLOCKS(base, offset, source) \
#define ZERO_LAST_BLOCKS(base, offset, source) \
std
source
,
[
base
-
offset
-
0x38
]
;
\
STORE_LAST
(
source
,
base
,
offset
,
0x38
)
;
\
std
source
,
[
base
-
offset
-
0x30
]
; \
STORE_LAST
(
source
,
base
,
offset
,
0x30
)
; \
std
source
,
[
base
-
offset
-
0x28
]
;
\
STORE_LAST
(
source
,
base
,
offset
,
0x28
)
;
\
std
source
,
[
base
-
offset
-
0x20
]
;
\
STORE_LAST
(
source
,
base
,
offset
,
0x20
)
;
\
std
source
,
[
base
-
offset
-
0x18
]
;
\
STORE_LAST
(
source
,
base
,
offset
,
0x18
)
;
\
std
source
,
[
base
-
offset
-
0x10
]
;
\
STORE_LAST
(
source
,
base
,
offset
,
0x10
)
;
\
std
source
,
[
base
-
offset
-
0x08
]
;
\
STORE_LAST
(
source
,
base
,
offset
,
0x08
)
;
\
std
source
,
[
base
-
offset
-
0x00
]
;
STORE_LAST
(
source
,
base
,
offset
,
0x00
)
;
.
text
.
text
.
align
4
.
align
4
...
@@ -120,8 +129,6 @@ __bzero:
...
@@ -120,8 +129,6 @@ __bzero:
ZERO_BIG_BLOCK
(%
o0
,
0x00
,
%
g2
)
ZERO_BIG_BLOCK
(%
o0
,
0x00
,
%
g2
)
subcc
%
o3
,
128
,
%
o3
subcc
%
o3
,
128
,
%
o3
ZERO_BIG_BLOCK
(%
o0
,
0x40
,
%
g2
)
ZERO_BIG_BLOCK
(%
o0
,
0x40
,
%
g2
)
11
:
EXT
(10
b
,
11
b
,
20
f
)
bne
10
b
bne
10
b
add
%
o0
,
128
,
%
o0
add
%
o0
,
128
,
%
o0
...
@@ -136,7 +143,6 @@ __bzero:
...
@@ -136,7 +143,6 @@ __bzero:
jmp
%
o4
jmp
%
o4
add
%
o0
,
%
o2
,
%
o0
add
%
o0
,
%
o2
,
%
o0
12
:
ZERO_LAST_BLOCKS
(%
o0
,
0x48
,
%
g2
)
ZERO_LAST_BLOCKS
(%
o0
,
0x48
,
%
g2
)
ZERO_LAST_BLOCKS
(%
o0
,
0x08
,
%
g2
)
ZERO_LAST_BLOCKS
(%
o0
,
0x08
,
%
g2
)
13
:
13
:
...
@@ -182,24 +188,10 @@ __bzero:
...
@@ -182,24 +188,10 @@ __bzero:
.
section
.
fixup
,#
alloc
,#
execinstr
.
section
.
fixup
,#
alloc
,#
execinstr
.
align
4
.
align
4
20
:
30
:
cmp
%
g2
,
8
bleu
1
f
and
%
o1
,
0x7f
,
%
o1
and
%
o1
,
0x7f
,
%
o1
sub
%
g2
,
9
,
%
g2
add
%
o3
,
64
,
%
o3
1
:
sll
%
g2
,
3
,
%
g2
add
%
o3
,
%
o1
,
%
o0
retl
retl
sub
%
o0
,
%
g2
,
%
o0
add
%
o3
,
%
o1
,
%
o0
21
:
mov
8
,
%
o0
and
%
o1
,
7
,
%
o1
sub
%
o0
,
%
g2
,
%
o0
sll
%
o0
,
3
,
%
o0
retl
add
%
o0
,
%
o1
,
%
o0
.
globl
__bzero_end
.
globl
__bzero_end
__bzero_end
:
__bzero_end
:
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