1 files changed, 43 insertions, 6 deletions

diff --git a/arch/s390/lib/mem.S b/arch/s390/lib/mem.S
index be9fa65bfac4..7ff79a4ff00c 100644
--- a/arch/s390/lib/mem.S
+++ b/arch/s390/lib/mem.S
@@ -8,6 +8,43 @@
 #include <asm/export.h>
 
 /*
+ * void *memmove(void *dest, const void *src, size_t n)
+ */
+ENTRY(memmove)
+	ltgr	%r4,%r4
+	lgr	%r1,%r2
+	bzr	%r14
+	aghi	%r4,-1
+	clgr	%r2,%r3
+	jnh	.Lmemmove_forward
+	la	%r5,1(%r4,%r3)
+	clgr	%r2,%r5
+	jl	.Lmemmove_reverse
+.Lmemmove_forward:
+	srlg	%r0,%r4,8
+	ltgr	%r0,%r0
+	jz	.Lmemmove_forward_remainder
+.Lmemmove_forward_loop:
+	mvc	0(256,%r1),0(%r3)
+	la	%r1,256(%r1)
+	la	%r3,256(%r3)
+	brctg	%r0,.Lmemmove_forward_loop
+.Lmemmove_forward_remainder:
+	larl	%r5,.Lmemmove_mvc
+	ex	%r4,0(%r5)
+	br	%r14
+.Lmemmove_reverse:
+	ic	%r0,0(%r4,%r3)
+	stc	%r0,0(%r4,%r1)
+	brctg	%r4,.Lmemmove_reverse
+	ic	%r0,0(%r4,%r3)
+	stc	%r0,0(%r4,%r1)
+	br	%r14
+.Lmemmove_mvc:
+	mvc	0(1,%r1),0(%r3)
+EXPORT_SYMBOL(memmove)
+
+/*
  * memset implementation
  *
  * This code corresponds to the C construct below. We do distinguish
@@ -31,12 +68,12 @@ ENTRY(memset)
 	srlg	%r3,%r4,8
 	ltgr	%r3,%r3
 	lgr	%r1,%r2
-	jz	.Lmemset_clear_rest
+	jz	.Lmemset_clear_remainder
 .Lmemset_clear_loop:
 	xc	0(256,%r1),0(%r1)
 	la	%r1,256(%r1)
 	brctg	%r3,.Lmemset_clear_loop
-.Lmemset_clear_rest:
+.Lmemset_clear_remainder:
 	larl	%r3,.Lmemset_xc
 	ex	%r4,0(%r3)
 	br	%r14
@@ -48,12 +85,12 @@ ENTRY(memset)
 	aghi	%r4,-2
 	srlg	%r3,%r4,8
 	ltgr	%r3,%r3
-	jz	.Lmemset_fill_rest
+	jz	.Lmemset_fill_remainder
 .Lmemset_fill_loop:
 	mvc	1(256,%r1),0(%r1)
 	la	%r1,256(%r1)
 	brctg	%r3,.Lmemset_fill_loop
-.Lmemset_fill_rest:
+.Lmemset_fill_remainder:
 	larl	%r3,.Lmemset_mvc
 	ex	%r4,0(%r3)
 	br	%r14
@@ -76,7 +113,7 @@ ENTRY(memcpy)
 	ltgr	%r5,%r5
 	lgr	%r1,%r2
 	jnz	.Lmemcpy_loop
-.Lmemcpy_rest:
+.Lmemcpy_remainder:
 	larl	%r5,.Lmemcpy_mvc
 	ex	%r4,0(%r5)
 	br	%r14
@@ -85,7 +122,7 @@ ENTRY(memcpy)
 	la	%r1,256(%r1)
 	la	%r3,256(%r3)
 	brctg	%r5,.Lmemcpy_loop
-	j	.Lmemcpy_rest
+	j	.Lmemcpy_remainder
 .Lmemcpy_mvc:
 	mvc	0(1,%r1),0(%r3)
 EXPORT_SYMBOL(memcpy)