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S390: Unify 31/64bit memcpy.

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The implementation of memcpy/mempcpy for s390-32 (31bit)
and s390-64 (64bit) is nearly the same.
This patch unifies it for maintability reasons.

__mem[p]cpy_z10 and __mem[p]cpy_z196 differs between 31 and 64bit:
-31bit needs .machinemode "zarch_nohighgprs" and llgfr   %r4,%r4
-lr vs lgr; lgr can be also used on 31bit as this ifunc variant
is only called if we are on a zarch machine.

__mem[p]cpy_default differs between 31 and 64bit:
-Some 31bit vs 64bit instructions (e.g. ltr vs ltgr.
Solved with 31/64 specific instruction macros).
-The address of mvc instruction is setup in different ways
(larl vs bras). Solved with #if defined __s390x__.

__memcpy_mvcle differs between 31 and 64bit:
-lr vs lgr; ahi vs aghi;
Solved with 31/64bit specific instruction macros.

Otherwise 31/64bit implementation has the same structure of the code.

ChangeLog:

	* sysdeps/s390/s390-64/memcpy.S: Move to ...
	* sysdeps/s390/memcpy.S: ... here.
	Adjust to be usable for 31/64bit.
	* sysdeps/s390/s390-32/memcpy.S: Delete File.
	* sysdeps/s390/multiarch/Makefile (sysdep_routines): Add memcpy.
	* sysdeps/s390/s390-32/multiarch/Makefile: Delete file.
	* sysdeps/s390/s390-64/multiarch/Makefile: Likewise.
	* sysdeps/s390/s390-64/multiarch/memcpy-s390x.S: Move to ...
	* sysdeps/s390/multiarch/memcpy-s390x.S: ... here.
	Adjust to be usable for 31/64bit.
	* sysdeps/s390/s390-32/multiarch/memcpy-s390.S: Delete File.
	* sysdeps/s390/s390-64/multiarch/memcpy.c: Move to ...
	* sysdeps/s390/multiarch/memcpy.c: ... here.
	* sysdeps/s390/s390-32/multiarch/memcpy.c: Delete File.
This commit is contained in:
Stefan Liebler 2018-12-18 13:57:06 +01:00
parent b7e024a838
commit df3eb8de31
10 changed files with 98 additions and 281 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
ChangeLog
View File

@ -1,3 +1,20 @@
2018-12-18 Stefan Liebler <stli@linux.ibm.com>
* sysdeps/s390/s390-64/memcpy.S: Move to ...
* sysdeps/s390/memcpy.S: ... here.
Adjust to be usable for 31/64bit.
* sysdeps/s390/s390-32/memcpy.S: Delete File.
* sysdeps/s390/multiarch/Makefile (sysdep_routines): Add memcpy.
* sysdeps/s390/s390-32/multiarch/Makefile: Delete file.
* sysdeps/s390/s390-64/multiarch/Makefile: Likewise.
* sysdeps/s390/s390-64/multiarch/memcpy-s390x.S: Move to ...
* sysdeps/s390/multiarch/memcpy-s390x.S: ... here.
Adjust to be usable for 31/64bit.
* sysdeps/s390/s390-32/multiarch/memcpy-s390.S: Delete File.
* sysdeps/s390/s390-64/multiarch/memcpy.c: Move to ...
* sysdeps/s390/multiarch/memcpy.c: ... here.
* sysdeps/s390/s390-32/multiarch/memcpy.c: Delete File.
2018-12-18 Stefan Liebler <stli@linux.ibm.com>
* sysdeps/s390/ifunc-memcmp.h: New File.

98
sysdeps/s390/s390-64/memcpy.S → sysdeps/s390/memcpy.S
View File

@ -1,4 +1,4 @@
/* memcpy - copy a block from source to destination. 64 bit S/390 version.
/* memcpy - copy a block from source to destination. 31/64 bit S/390 version.
Copyright (C) 2012-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
@ -25,13 +25,31 @@
%r3 = address of source memory area
%r4 = number of bytes to copy. */
.text
#if defined __s390x__
# define LTGR ltgr
# define CGHI cghi
# define LGR lgr
# define AGHI aghi
# define BRCTG brctg
#else
# define LTGR ltr
# define CGHI chi
# define LGR lr
# define AGHI ahi
# define BRCTG brct
#endif /* ! defined __s390x__ */
ENTRY(__mempcpy)
#if defined __s390x__
.machine "z900"
lgr %r1,%r2 # Use as dest
#else
.machine "g5"
#endif /* ! defined __s390x__ */
LGR %r1,%r2 # Use as dest
la %r2,0(%r4,%r2) # Return dest + n
j .L_Z900_start
j .L_Z900_G5_start
END(__mempcpy)
#ifndef USE_MULTIARCH
libc_hidden_def (__mempcpy)
@ -40,30 +58,46 @@ libc_hidden_builtin_def (mempcpy)
#endif
ENTRY(memcpy)
#if defined __s390x__
.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
jne .L_Z900_13
.L_Z900_3:
larl %r5,.L_Z900_15
ex %r4,0(%r5)
.L_Z900_4:
#else
.machine "g5"
#endif /* ! defined __s390x__ */
LGR %r1,%r2 # r1: Use as dest ; r2: Return dest
.L_Z900_G5_start:
LTGR %r4,%r4
je .L_Z900_G5_4
AGHI %r4,-1
#if defined __s390x__
srlg %r5,%r4,8
#else
lr %r5,%r4
srl %r5,8
#endif /* ! defined __s390x__ */
LTGR %r5,%r5
jne .L_Z900_G5_13
.L_Z900_G5_3:
#if defined __s390x__
larl %r5,.L_Z900_G5_15
# define Z900_G5_EX_D 0
#else
basr %r5,0
.L_Z900_G5_14:
# define Z900_G5_EX_D .L_Z900_G5_15-.L_Z900_G5_14
#endif /* ! defined __s390x__ */
ex %r4,Z900_G5_EX_D(%r5)
.L_Z900_G5_4:
br %r14
.L_Z900_13:
cghi %r5,4096 # Switch to mvcle for copies >1MB
.L_Z900_G5_13:
CGHI %r5,4096 # Switch to mvcle for copies >1MB
jh __memcpy_mvcle
.L_Z900_12:
.L_Z900_G5_12:
mvc 0(256,%r1),0(%r3)
la %r1,256(%r1)
la %r3,256(%r3)
brctg %r5,.L_Z900_12
j .L_Z900_3
.L_Z900_15:
BRCTG %r5,.L_Z900_G5_12
j .L_Z900_G5_3
.L_Z900_G5_15:
mvc 0(1,%r1),0(%r3)
END(memcpy)
#ifndef USE_MULTIARCH
@ -74,15 +108,21 @@ 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.
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
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,%r0 # return destination address
LGR %r2,%r0 # return destination address
br %r14
END(__memcpy_mvcle)
#undef LTGR
#undef CGHI
#undef LGR
#undef AGHI
#undef BRCTG

2
sysdeps/s390/multiarch/Makefile
View File

@ -19,7 +19,7 @@ sysdep_routines += strlen strlen-vx strlen-c \
rawmemchr rawmemchr-vx rawmemchr-c \
memccpy memccpy-vx memccpy-c \
memrchr memrchr-vx memrchr-c \
mempcpy
mempcpy memcpy memcpy-s390x
endif
ifeq ($(subdir),wcsmbs)

12
sysdeps/s390/s390-64/multiarch/memcpy-s390x.S → sysdeps/s390/multiarch/memcpy-s390x.S
View File

@ -1,4 +1,4 @@
/* CPU specific memcpy implementations. 64 bit S/390 version.
/* CPU specific memcpy implementations. 31/64 bit S/390 version.
Copyright (C) 2012-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
@ -31,6 +31,7 @@
ENTRY(____mempcpy_z196)
.machine "z196"
.machinemode "zarch_nohighgprs"
lgr %r1,%r2 # Use as dest
la %r2,0(%r4,%r2) # Return dest + n
j .L_Z196_start
@ -38,8 +39,12 @@ END(____mempcpy_z196)
ENTRY(__memcpy_z196)
.machine "z196"
.machinemode "zarch_nohighgprs"
lgr %r1,%r2 # r1: Use as dest ; r2: Return dest
.L_Z196_start:
# if !defined __s390x__
llgfr %r4,%r4
# endif /* !defined __s390x__ */
ltgr %r4,%r4
je .L_Z196_4
aghi %r4,-1
@ -68,6 +73,7 @@ END(__memcpy_z196)
ENTRY(____mempcpy_z10)
.machine "z10"
.machinemode "zarch_nohighgprs"
lgr %r1,%r2 # Use as dest
la %r2,0(%r4,%r2) # Return dest + n
j .L_Z10_start
@ -75,8 +81,12 @@ END(____mempcpy_z10)
ENTRY(__memcpy_z10)
.machine "z10"
.machinemode "zarch_nohighgprs"
lgr %r1,%r2 # r1: Use as dest ; r2: Return dest
.L_Z10_start:
# if !defined __s390x__
llgfr %r4,%r4
# endif /* !defined __s390x__ */
cgije %r4,0,.L_Z10_4
aghi %r4,-1
srlg %r5,%r4,8

0
sysdeps/s390/s390-32/multiarch/memcpy.c → sysdeps/s390/multiarch/memcpy.c
View File

89
sysdeps/s390/s390-32/memcpy.S
View File

@ -1,89 +0,0 @@
/* memcpy - copy a block from source to destination. S/390 version.
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
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/>. */
#include "sysdep.h"
#include "asm-syntax.h"
/* INPUT PARAMETERS
%r2 = address of destination memory area
%r3 = address of source memory area
%r4 = number of bytes to copy. */
.text
ENTRY(__mempcpy)
.machine "g5"
lr %r1,%r2 # Use as dest
la %r2,0(%r4,%r2) # Return dest + n
j .L_G5_start
END(__mempcpy)
#ifndef USE_MULTIARCH
libc_hidden_def (__mempcpy)
weak_alias (__mempcpy, mempcpy)
libc_hidden_builtin_def (mempcpy)
#endif
ENTRY(memcpy)
.machine "g5"
lr %r1,%r2 # r1: Use as dest ; r2: Return dest
.L_G5_start:
ltr %r4,%r4
je .L_G5_99
ahi %r4,-1
lr %r5,%r4
srl %r5,8
ltr %r5,%r5
jne .L_G5_13
.L_G5_4:
basr %r5,0
.L_G5_16:
ex %r4,.L_G5_17-.L_G5_16(%r5)
.L_G5_99:
br %r14
.L_G5_13:
chi %r5,4096 # Switch to mvcle for copies >1MB
jh __memcpy_mvcle
.L_G5_12:
mvc 0(256,%r1),0(%r3)
la %r1,256(%r1)
la %r3,256(%r3)
brct %r5,.L_G5_12
j .L_G5_4
.L_G5_17:
mvc 0(1,%r1),0(%r3)
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.
lr %r0,%r2 # backup return dest [ + n ]
ahi %r4,1 # length + 1
lr %r5,%r4 # source length
lr %r4,%r3 # source address
lr %r2,%r1 # destination address
lr %r3,%r5 # destination length = source length
.L_MVCLE_1:
mvcle %r2,%r4,0 # thats it, MVCLE is your friend
jo .L_MVCLE_1
lr %r2,%r0 # return destination address
br %r14
END(__memcpy_mvcle)

3
sysdeps/s390/s390-32/multiarch/Makefile
View File

@ -1,3 +0,0 @@
ifeq ($(subdir),string)
sysdep_routines += memcpy memcpy-s390
endif

128
sysdeps/s390/s390-32/multiarch/memcpy-s390.S
View File

@ -1,128 +0,0 @@
/* CPU specific memcpy implementations. 32 bit S/390 version.
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
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/>. */
#include "sysdep.h"
#include "asm-syntax.h"
/* INPUT PARAMETERS
%r2 = target operands address
%r3 = source operands address
%r4 = number of bytes to copy. */
.text
#if defined SHARED && IS_IN (libc)
ENTRY(____mempcpy_z196)
.machine "z196"
.machinemode "zarch_nohighgprs"
lr %r1,%r2 # Use as dest
la %r2,0(%r4,%r2) # Return dest + n
j .L_Z196_start
END(____mempcpy_z196)
ENTRY(__memcpy_z196)
.machine "z196"
.machinemode "zarch_nohighgprs"
lr %r1,%r2 # r1: Use as dest ; r2: Return dest
.L_Z196_start:
llgfr %r4,%r4
ltgr %r4,%r4
je .L_Z196_4
aghi %r4,-1
srlg %r5,%r4,8
ltgr %r5,%r5
jne .L_Z196_5
.L_Z196_3:
exrl %r4,.L_Z196_14
.L_Z196_4:
br %r14
.L_Z196_5:
cgfi %r5,262144 # Switch to mvcle for copies >64MB
jh __memcpy_mvcle
.L_Z196_2:
pfd 1,768(%r3)
pfd 2,768(%r1)
mvc 0(256,%r1),0(%r3)
aghi %r5,-1
la %r1,256(%r1)
la %r3,256(%r3)
jne .L_Z196_2
j .L_Z196_3
.L_Z196_14:
mvc 0(1,%r1),0(%r3)
END(__memcpy_z196)
ENTRY(____mempcpy_z10)
.machine "z10"
.machinemode "zarch_nohighgprs"
lr %r1,%r2 # Use as dest
la %r2,0(%r4,%r2) # Return dest + n
j .L_Z10_start
END(____mempcpy_z10)
ENTRY(__memcpy_z10)
.machine "z10"
.machinemode "zarch_nohighgprs"
lr %r1,%r2 # r1: Use as dest ; r2: Return dest
.L_Z10_start:
llgfr %r4,%r4
cgije %r4,0,.L_Z10_4
aghi %r4,-1
srlg %r5,%r4,8
cgijlh %r5,0,.L_Z10_13
.L_Z10_3:
exrl %r4,.L_Z10_15
.L_Z10_4:
br %r14
.L_Z10_13:
cgfi %r5,65535 # Switch to mvcle for copies >16MB
jh __memcpy_mvcle
.L_Z10_12:
pfd 1,768(%r3)
pfd 2,768(%r1)
mvc 0(256,%r1),0(%r3)
la %r1,256(%r1)
la %r3,256(%r3)
brctg %r5,.L_Z10_12
j .L_Z10_3
.L_Z10_15:
mvc 0(1,%r1),0(%r3)
END(__memcpy_z10)
# define __mempcpy ____mempcpy_default
#endif /* SHARED && IS_IN (libc) */
#define memcpy __memcpy_default
#include "../memcpy.S"
#undef memcpy
#if defined SHARED && IS_IN (libc)
.globl __GI_memcpy
.set __GI_memcpy,__memcpy_default
.globl __GI_mempcpy
.set __GI_mempcpy,____mempcpy_default
.globl __GI___mempcpy
.set __GI___mempcpy,____mempcpy_default
#else
.globl memcpy
.set memcpy,__memcpy_default
.weak mempcpy
.set mempcpy,__mempcpy
#endif

3
sysdeps/s390/s390-64/multiarch/Makefile
View File

@ -1,3 +0,0 @@
ifeq ($(subdir),string)
sysdep_routines += memcpy memcpy-s390x
endif

27
sysdeps/s390/s390-64/multiarch/memcpy.c
View File

@ -1,27 +0,0 @@
/* Multiple versions of memcpy.
Copyright (C) 2015-2018 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
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/>. */
/* In the static lib memcpy is needed before the reloc is resolved. */
#if defined SHARED && IS_IN (libc)
# define memcpy __redirect_memcpy
# include <string.h>
# undef memcpy
# include <ifunc-resolve.h>
s390_libc_ifunc (__redirect_memcpy, __memcpy, memcpy)
#endif