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authorDavid S. Miller <davem@davemloft.net>2012-09-27 01:06:43 -0700
committerDavid S. Miller <davem@davemloft.net>2012-09-27 01:06:43 -0700
commit1b62ca7bf5775bed048032b7e779561e1fe66aa0 (patch)
treedac210049b36fe6a8b57a8a98a4bc2687fcdcc7c
parenta9e8d1a6b87167116e5779378f1d25ffed2e833b (diff)
downloadlinux-1b62ca7bf5775bed048032b7e779561e1fe66aa0.tar.gz
sparc64: Fix return value of Niagara-2 memcpy.
It gets clobbered by the kernel's VISEntryHalf, so we have to save it in a different register than the set clobbered by that macro. The instance in glibc is OK and doesn't have this problem. Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--arch/sparc/lib/NG2memcpy.S46
1 files changed, 23 insertions, 23 deletions
diff --git a/arch/sparc/lib/NG2memcpy.S b/arch/sparc/lib/NG2memcpy.S
index 03eadf66b0d3..2c20ad63ddbf 100644
--- a/arch/sparc/lib/NG2memcpy.S
+++ b/arch/sparc/lib/NG2memcpy.S
@@ -14,7 +14,7 @@
#define FPRS_FEF 0x04
#ifdef MEMCPY_DEBUG
#define VISEntryHalf rd %fprs, %o5; wr %g0, FPRS_FEF, %fprs; \
- clr %g1; clr %g2; clr %g3; subcc %g0, %g0, %g0;
+ clr %g1; clr %g2; clr %g3; clr %g5; subcc %g0, %g0, %g0;
#define VISExitHalf and %o5, FPRS_FEF, %o5; wr %o5, 0x0, %fprs
#else
#define VISEntryHalf rd %fprs, %o5; wr %g0, FPRS_FEF, %fprs
@@ -182,13 +182,13 @@ FUNC_NAME: /* %o0=dst, %o1=src, %o2=len */
cmp %g2, 0
tne %xcc, 5
PREAMBLE
- mov %o0, GLOBAL_SPARE
+ mov %o0, %o3
cmp %o2, 0
be,pn %XCC, 85f
- or %o0, %o1, %o3
+ or %o0, %o1, GLOBAL_SPARE
cmp %o2, 16
blu,a,pn %XCC, 80f
- or %o3, %o2, %o3
+ or GLOBAL_SPARE, %o2, GLOBAL_SPARE
/* 2 blocks (128 bytes) is the minimum we can do the block
* copy with. We need to ensure that we'll iterate at least
@@ -202,7 +202,7 @@ FUNC_NAME: /* %o0=dst, %o1=src, %o2=len */
*/
cmp %o2, (4 * 64)
blu,pt %XCC, 75f
- andcc %o3, 0x7, %g0
+ andcc GLOBAL_SPARE, 0x7, %g0
/* %o0: dst
* %o1: src
@@ -404,13 +404,13 @@ FUNC_NAME: /* %o0=dst, %o1=src, %o2=len */
* over. If anything is left, we copy it one byte at a time.
*/
brz,pt %o2, 85f
- sub %o0, %o1, %o3
+ sub %o0, %o1, GLOBAL_SPARE
ba,a,pt %XCC, 90f
.align 64
75: /* 16 < len <= 64 */
bne,pn %XCC, 75f
- sub %o0, %o1, %o3
+ sub %o0, %o1, GLOBAL_SPARE
72:
andn %o2, 0xf, %o4
@@ -420,9 +420,9 @@ FUNC_NAME: /* %o0=dst, %o1=src, %o2=len */
add %o1, 0x08, %o1
EX_LD(LOAD(ldx, %o1, %g1))
sub %o1, 0x08, %o1
- EX_ST(STORE(stx, %o5, %o1 + %o3))
+ EX_ST(STORE(stx, %o5, %o1 + GLOBAL_SPARE))
add %o1, 0x8, %o1
- EX_ST(STORE(stx, %g1, %o1 + %o3))
+ EX_ST(STORE(stx, %g1, %o1 + GLOBAL_SPARE))
bgu,pt %XCC, 1b
add %o1, 0x8, %o1
73: andcc %o2, 0x8, %g0
@@ -430,14 +430,14 @@ FUNC_NAME: /* %o0=dst, %o1=src, %o2=len */
nop
sub %o2, 0x8, %o2
EX_LD(LOAD(ldx, %o1, %o5))
- EX_ST(STORE(stx, %o5, %o1 + %o3))
+ EX_ST(STORE(stx, %o5, %o1 + GLOBAL_SPARE))
add %o1, 0x8, %o1
1: andcc %o2, 0x4, %g0
be,pt %XCC, 1f
nop
sub %o2, 0x4, %o2
EX_LD(LOAD(lduw, %o1, %o5))
- EX_ST(STORE(stw, %o5, %o1 + %o3))
+ EX_ST(STORE(stw, %o5, %o1 + GLOBAL_SPARE))
add %o1, 0x4, %o1
1: cmp %o2, 0
be,pt %XCC, 85f
@@ -454,11 +454,11 @@ FUNC_NAME: /* %o0=dst, %o1=src, %o2=len */
1: subcc %g1, 1, %g1
EX_LD(LOAD(ldub, %o1, %o5))
- EX_ST(STORE(stb, %o5, %o1 + %o3))
+ EX_ST(STORE(stb, %o5, %o1 + GLOBAL_SPARE))
bgu,pt %icc, 1b
add %o1, 1, %o1
-2: add %o1, %o3, %o0
+2: add %o1, GLOBAL_SPARE, %o0
andcc %o1, 0x7, %g1
bne,pt %icc, 8f
sll %g1, 3, %g1
@@ -468,16 +468,16 @@ FUNC_NAME: /* %o0=dst, %o1=src, %o2=len */
nop
ba,a,pt %xcc, 73b
-8: mov 64, %o3
+8: mov 64, GLOBAL_SPARE
andn %o1, 0x7, %o1
EX_LD(LOAD(ldx, %o1, %g2))
- sub %o3, %g1, %o3
+ sub GLOBAL_SPARE, %g1, GLOBAL_SPARE
andn %o2, 0x7, %o4
sllx %g2, %g1, %g2
1: add %o1, 0x8, %o1
EX_LD(LOAD(ldx, %o1, %g3))
subcc %o4, 0x8, %o4
- srlx %g3, %o3, %o5
+ srlx %g3, GLOBAL_SPARE, %o5
or %o5, %g2, %o5
EX_ST(STORE(stx, %o5, %o0))
add %o0, 0x8, %o0
@@ -489,32 +489,32 @@ FUNC_NAME: /* %o0=dst, %o1=src, %o2=len */
be,pn %icc, 85f
add %o1, %g1, %o1
ba,pt %xcc, 90f
- sub %o0, %o1, %o3
+ sub %o0, %o1, GLOBAL_SPARE
.align 64
80: /* 0 < len <= 16 */
- andcc %o3, 0x3, %g0
+ andcc GLOBAL_SPARE, 0x3, %g0
bne,pn %XCC, 90f
- sub %o0, %o1, %o3
+ sub %o0, %o1, GLOBAL_SPARE
1:
subcc %o2, 4, %o2
EX_LD(LOAD(lduw, %o1, %g1))
- EX_ST(STORE(stw, %g1, %o1 + %o3))
+ EX_ST(STORE(stw, %g1, %o1 + GLOBAL_SPARE))
bgu,pt %XCC, 1b
add %o1, 4, %o1
85: retl
- mov EX_RETVAL(GLOBAL_SPARE), %o0
+ mov EX_RETVAL(%o3), %o0
.align 32
90:
subcc %o2, 1, %o2
EX_LD(LOAD(ldub, %o1, %g1))
- EX_ST(STORE(stb, %g1, %o1 + %o3))
+ EX_ST(STORE(stb, %g1, %o1 + GLOBAL_SPARE))
bgu,pt %XCC, 90b
add %o1, 1, %o1
retl
- mov EX_RETVAL(GLOBAL_SPARE), %o0
+ mov EX_RETVAL(%o3), %o0
.size FUNC_NAME, .-FUNC_NAME