Add leading underscores to the entries in the __jmp_buf structure.

[kopensolaris-gnu/glibc.git] / sysdeps / s390 / s390-64 / memcpy.S

diff --git a/sysdeps/s390/s390-64/memcpy.S b/sysdeps/s390/s390-64/memcpy.S
index 8212bd3..d13c0ad 100644 (file)
--- a/sysdeps/s390/s390-64/memcpy.S
+++ b/sysdeps/s390/s390-64/memcpy.S
@@ -32,8 +32,11 @@ ENTRY(memcpy)
        jz      .L3
        aghi    %r4,-1              # length - 1
        lgr     %r1,%r2             # copy destination address
-       srag    %r5,%r4,8
+       srlg    %r5,%r4,8
+       ltgr    %r5,%r5             # < 256 bytes to mvoe ?
        jz      .L1
+       chi     %r6,255             # > 1 MB to move ?
+       jh      .L4
 .L0:   mvc     0(256,%r1),0(%r3)   # move in 256 byte chunks
        la      %r1,256(%r1)
        la      %r3,256(%r3)
@@ -42,5 +45,15 @@ ENTRY(memcpy)
        mvc     0(1,%r1),0(%r3)     # instruction for execute
 .L2:   ex      %r4,0(%r5)          # execute mvc with length ((%r4)&255)+1
 .L3:   br      %r14
+       # data copies > 1MB are faster with mvcle.
+.L4:   aghi    %r4,1               # length + 1
+       lgr     %r5,%r4             # source length
+       lgr     %r4,%r2             # source address
+       lgr     %r2,%r3             # set destination
+       lgr     %r3,%r5             # destination length = source length
+.L5:   mvcle   %r2,%r4,0           # thats it, MVCLE is your friend
+       jo      .L5
+       lgr     %r2,%r1             # return destination address
+       br      %r14
 END(memcpy)