diff options
Diffstat (limited to 'sysdeps/s390/s390-64/memcpy.S')
| -rw-r--r-- | sysdeps/s390/s390-64/memcpy.S | 51 |
1 files changed, 29 insertions, 22 deletions
diff --git a/sysdeps/s390/s390-64/memcpy.S b/sysdeps/s390/s390-64/memcpy.S index e84a3572cb..2e5490df23 100644 --- a/sysdeps/s390/s390-64/memcpy.S +++ b/sysdeps/s390/s390-64/memcpy.S @@ -1,5 +1,5 @@ /* memcpy - copy a block from source to destination. 64 bit S/390 version. - Copyright (C) 2012-2016 Free Software Foundation, Inc. + Copyright (C) 2012-2018 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -27,19 +27,27 @@ .text +ENTRY(__mempcpy) + .machine "z900" + lgr %r1,%r2 # Use as dest + la %r2,0(%r4,%r2) # Return dest + n + j .L_Z900_start +END(__mempcpy) +#ifndef USE_MULTIARCH +libc_hidden_def (__mempcpy) +weak_alias (__mempcpy, mempcpy) +libc_hidden_builtin_def (mempcpy) +#endif -#ifdef USE_MULTIARCH -ENTRY(__memcpy_default) -#else ENTRY(memcpy) -#endif .machine "z900" + lgr %r1,%r2 # r1: Use as dest ; r2: Return dest +.L_Z900_start: ltgr %r4,%r4 je .L_Z900_4 aghi %r4,-1 srlg %r5,%r4,8 ltgr %r5,%r5 - lgr %r1,%r2 jne .L_Z900_13 .L_Z900_3: larl %r5,.L_Z900_15 @@ -47,7 +55,7 @@ ENTRY(memcpy) .L_Z900_4: br %r14 .L_Z900_13: - chi %r5,4096 # Switch to mvcle for copies >1MB + cghi %r5,4096 # Switch to mvcle for copies >1MB jh __memcpy_mvcle .L_Z900_12: mvc 0(256,%r1),0(%r3) @@ -57,25 +65,24 @@ ENTRY(memcpy) j .L_Z900_3 .L_Z900_15: mvc 0(1,%r1),0(%r3) - -#ifdef USE_MULTIARCH -END(__memcpy_default) -#else END(memcpy) +#ifndef USE_MULTIARCH libc_hidden_builtin_def (memcpy) #endif ENTRY(__memcpy_mvcle) - # Using as standalone function will result in unexpected - # results since the length field is incremented by 1 in order to - # compensate the changes already done in the functions above. - aghi %r4,1 # length + 1 - lgr %r5,%r4 # source length - lgr %r4,%r3 # source address - lgr %r3,%r5 # destination length = source length + # Using as standalone function will result in unexpected + # results since the length field is incremented by 1 in order to + # compensate the changes already done in the functions above. + lgr %r0,%r2 # backup return dest [ + n ] + aghi %r4,1 # length + 1 + lgr %r5,%r4 # source length + lgr %r4,%r3 # source address + lgr %r2,%r1 # destination address + lgr %r3,%r5 # destination length = source length .L_MVCLE_1: - mvcle %r2,%r4,0 # thats it, MVCLE is your friend - jo .L_MVCLE_1 - lgr %r2,%r1 # return destination address - br %r14 + mvcle %r2,%r4,0 # thats it, MVCLE is your friend + jo .L_MVCLE_1 + lgr %r2,%r0 # return destination address + br %r14 END(__memcpy_mvcle) |