| commit e099aab060df178a7fcd5a55282650fe45ccea66 |
| Author: Stefan Liebler <stli@linux.ibm.com> |
| Date: Tue Dec 18 13:57:07 2018 +0100 |
| |
| S390: Remove s390 specific implementation of bcopy. |
| |
| Nowadays gcc is automatically replacing a call to bcopy |
| with a call to memmove. Thus only old binaries will call |
| the s390 specific bcopy implementation. |
| |
| The s390 specific implementation is using an own |
| implementation for memcpy in the forward case and is |
| relying on memmove in the backward case. |
| |
| After removing the s390 specific bcopy, the common code |
| bcopy is used. It just performs a tail call to memmove. |
| |
| ChangeLog: |
| * sysdeps/s390/s390-32/bcopy.S: Remove. |
| * sysdeps/s390/s390-64/bcopy.S: Likewise. |
| |
| diff --git a/sysdeps/s390/s390-32/bcopy.S b/sysdeps/s390/s390-32/bcopy.S |
| deleted file mode 100644 |
| index 560e04fdee93dafb..0000000000000000 |
| |
| |
| @@ -1,85 +0,0 @@ |
| -/* bcopy -- copy a block from source to destination. S/390 version. |
| - This file is part of the GNU C Library. |
| - Copyright (C) 2000-2018 Free Software Foundation, Inc. |
| - Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). |
| - |
| - The GNU C Library is free software; you can redistribute it and/or |
| - modify it under the terms of the GNU Lesser General Public |
| - License as published by the Free Software Foundation; either |
| - version 2.1 of the License, or (at your option) any later version. |
| - |
| - The GNU C Library is distributed in the hope that it will be useful, |
| - but WITHOUT ANY WARRANTY; without even the implied warranty of |
| - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| - Lesser General Public License for more details. |
| - |
| - You should have received a copy of the GNU Lesser General Public |
| - License along with the GNU C Library; if not, see |
| - <http://www.gnu.org/licenses/>. */ |
| - |
| -/* INPUT PARAMETERS |
| - %r2 = address of source |
| - %r3 = address of destination |
| - %r4 = number of bytes to copy. */ |
| - |
| -#include "sysdep.h" |
| -#include "asm-syntax.h" |
| - |
| - .text |
| -ENTRY(__bcopy) |
| - ltr %r1,%r4 # zero bcopy ? |
| - jz .L4 |
| - clr %r2,%r3 # check against destructive overlap |
| - jnl .L0 |
| - alr %r1,%r2 |
| - clr %r1,%r3 |
| - jh .L7 |
| -.L0: ahi %r4,-1 # length - 1 |
| - lr %r1,%r4 |
| - srl %r1,8 |
| - ltr %r1,%r1 # < 256 bytes to move ? |
| - jz .L2 |
| - chi %r1,255 # > 1MB to move ? |
| - jh .L5 |
| -.L1: mvc 0(256,%r3),0(%r2) # move in 256 byte chunks |
| - la %r2,256(%r2) |
| - la %r3,256(%r3) |
| - brct %r1,.L1 |
| -.L2: bras %r1,.L3 # setup base pointer for execute |
| - mvc 0(1,%r3),0(%r2) # instruction for execute |
| -.L3: ex %r4,0(%r1) # execute mvc with length ((%r4)&255)+1 |
| -.L4: br %r14 |
| - |
| - # data copies > 1MB are faster with mvcle. |
| -.L5: ahi %r4,1 # length + 1 |
| - lr %r5,%r4 # source length |
| - lr %r4,%r2 # source address |
| - lr %r2,%r3 # set destination |
| - lr %r3,%r5 # destination length = source length |
| -.L6: mvcle %r2,%r4,0 # thats it, MVCLE is your friend |
| - jo .L6 |
| - br %r14 |
| -.L7: # destructive overlay, can not use mvcle |
| - lr %r1,%r2 # bcopy is called with source,dest |
| - lr %r2,%r3 # memmove with dest,source! Oh, well... |
| - lr %r3,%r1 |
| - basr %r1,0 |
| -.L8: |
| -#ifdef PIC |
| - al %r1,.L9-.L8(%r1) # get address of global offset table |
| - # load address of memmove |
| - l %r1,memmove@GOT(%r1) |
| - br %r1 |
| -.L9: .long _GLOBAL_OFFSET_TABLE_-.L8 |
| -#else |
| - al %r1,.L9-.L8(%r1) # load address of memmove |
| - br %r1 # jump to memmove |
| -.L9: .long memmove-.L8 |
| -#endif |
| - |
| -END(__bcopy) |
| - |
| -#ifndef NO_WEAK_ALIAS |
| -weak_alias (__bcopy, bcopy) |
| -#endif |
| - |
| diff --git a/sysdeps/s390/s390-64/bcopy.S b/sysdeps/s390/s390-64/bcopy.S |
| deleted file mode 100644 |
| index 806dd15d0203d32a..0000000000000000 |
| |
| |
| @@ -1,71 +0,0 @@ |
| -/* bcopy -- copy a block from source to destination. 64 bit S/390 version. |
| - This file is part of the GNU C Library. |
| - Copyright (C) 2000-2018 Free Software Foundation, Inc. |
| - Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). |
| - |
| - The GNU C Library is free software; you can redistribute it and/or |
| - modify it under the terms of the GNU Lesser General Public |
| - License as published by the Free Software Foundation; either |
| - version 2.1 of the License, or (at your option) any later version. |
| - |
| - The GNU C Library is distributed in the hope that it will be useful, |
| - but WITHOUT ANY WARRANTY; without even the implied warranty of |
| - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| - Lesser General Public License for more details. |
| - |
| - You should have received a copy of the GNU Lesser General Public |
| - License along with the GNU C Library; if not, see |
| - <http://www.gnu.org/licenses/>. */ |
| - |
| -/* INPUT PARAMETERS |
| - %r2 = address of source |
| - %r3 = address of destination |
| - %r4 = number of bytes to copy. */ |
| - |
| -#include "sysdep.h" |
| -#include "asm-syntax.h" |
| - |
| - .text |
| -ENTRY(__bcopy) |
| - ltgr %r1,%r4 # zero bcopy ? |
| - jz .L4 |
| - clgr %r2,%r3 # check against destructive overlap |
| - jnl .L0 |
| - algr %r1,%r2 |
| - clgr %r1,%r3 |
| - jh .L7 |
| -.L0: aghi %r4,-1 # length - 1 |
| - srlg %r1,%r4,8 |
| - ltgr %r1,%r1 # < 256 bytes to move ? |
| - jz .L2 |
| - cghi %r1,255 # > 1MB to move ? |
| - jh .L5 |
| -.L1: mvc 0(256,%r3),0(%r2) # move in 256 byte chunks |
| - la %r2,256(%r2) |
| - la %r3,256(%r3) |
| - brctg %r1,.L1 |
| -.L2: bras %r1,.L3 # setup base pointer for execute |
| - mvc 0(1,%r3),0(%r2) # instruction for execute |
| -.L3: ex %r4,0(%r1) # execute mvc with length ((%r4)&255)+1 |
| -.L4: br %r14 |
| - # data copies > 1MB are faster with mvcle. |
| -.L5: 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 |
| -.L6: mvcle %r2,%r4,0 # thats it, MVCLE is your friend |
| - jo .L6 |
| - br %r14 |
| -.L7: # destructive overlay, can not use mvcle |
| - lgr %r1,%r2 # bcopy is called with source,dest |
| - lgr %r2,%r3 # memmove with dest,source! Oh, well... |
| - lgr %r3,%r1 |
| - jg HIDDEN_BUILTIN_JUMPTARGET(memmove) |
| - |
| -END(__bcopy) |
| - |
| -#ifndef NO_WEAK_ALIAS |
| -weak_alias (__bcopy, bcopy) |
| -#endif |
| - |