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30891f35fa
We stopped adding "Contributed by" or similar lines in sources in 2012 in favour of git logs and keeping the Contributors section of the glibc manual up to date. Removing these lines makes the license header a bit more consistent across files and also removes the possibility of error in attribution when license blocks or files are copied across since the contributed-by lines don't actually reflect reality in those cases. Move all "Contributed by" and similar lines (Written by, Test by, etc.) into a new file CONTRIBUTED-BY to retain record of these contributions. These contributors are also mentioned in manual/contrib.texi, so we just maintain this additional record as a courtesy to the earlier developers. The following scripts were used to filter a list of files to edit in place and to clean up the CONTRIBUTED-BY file respectively. These were not added to the glibc sources because they're not expected to be of any use in future given that this is a one time task: https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02 Reviewed-by: Carlos O'Donell <carlos@redhat.com>
218 lines
5.0 KiB
ArmAsm
218 lines
5.0 KiB
ArmAsm
/* Set a block of memory to some byte value. 31/64 bit S/390 version.
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Copyright (C) 2001-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include "asm-syntax.h"
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#include <ifunc-memset.h>
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/* INPUT PARAMETERS - MEMSET
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%r2 = address of memory area
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%r3 = byte to fill memory with
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%r4 = number of bytes to fill.
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INPUT PARAMETERS - BZERO
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%r2 = address of memory area
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%r3 = number of bytes to fill. */
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.text
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#if HAVE_MEMSET_Z900_G5
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# if defined __s390x__
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# define LTGR ltgr
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# define CGHI cghi
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# define LGR lgr
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# define AGHI aghi
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# define BRCTG brctg
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# else
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# define LTGR ltr
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# define CGHI chi
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# define LGR lr
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# define AGHI ahi
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# define BRCTG brct
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# endif /* ! defined __s390x__ */
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ENTRY(BZERO_Z900_G5)
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LGR %r4,%r3
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xr %r3,%r3
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j .L_Z900_G5_start
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END(BZERO_Z900_G5)
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ENTRY(MEMSET_Z900_G5)
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.L_Z900_G5_start:
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#if defined __s390x__
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.machine "z900"
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#else
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.machine "g5"
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#endif /* ! defined __s390x__ */
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LTGR %r4,%r4
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je .L_Z900_G5_4
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stc %r3,0(%r2)
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CGHI %r4,1
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LGR %r1,%r2
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je .L_Z900_G5_4
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AGHI %r4,-2
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#if defined __s390x__
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larl %r5,.L_Z900_G5_18
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srlg %r3,%r4,8
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# define Z900_G5_EX_D 0
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#else
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basr %r5,0
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.L_Z900_G5_19:
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# define Z900_G5_EX_D .L_Z900_G5_18-.L_Z900_G5_19
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lr %r3,%r4
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srl %r3,8
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#endif /* ! defined __s390x__ */
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LTGR %r3,%r3
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jne .L_Z900_G5_14
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.L_Z900_G5_3:
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ex %r4,Z900_G5_EX_D(%r5)
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.L_Z900_G5_4:
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br %r14
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.L_Z900_G5_14:
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mvc 1(256,%r1),0(%r1)
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la %r1,256(%r1)
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BRCTG %r3,.L_Z900_G5_14
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j .L_Z900_G5_3
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.L_Z900_G5_18:
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mvc 1(1,%r1),0(%r1)
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END(MEMSET_Z900_G5)
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# undef LTGR
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# undef CGHI
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# undef LGR
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# undef AGHI
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# undef BRCTG
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#endif /* HAVE_MEMSET_Z900_G5 */
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#if HAVE_MEMSET_Z10
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ENTRY(BZERO_Z10)
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.machine "z10"
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.machinemode "zarch_nohighgprs"
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lgr %r4,%r3
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xr %r3,%r3
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j .L_Z10_start
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END(BZERO_Z10)
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ENTRY(MEMSET_Z10)
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.L_Z10_start:
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.machine "z10"
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.machinemode "zarch_nohighgprs"
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# if !defined __s390x__
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llgfr %r4,%r4
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# endif /* !defined __s390x__ */
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cgije %r4,0,.L_Z10_4
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stc %r3,0(%r2)
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lgr %r1,%r2
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cgije %r4,1,.L_Z10_4
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aghi %r4,-2
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srlg %r5,%r4,8
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cgijlh %r5,0,.L_Z10_15
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.L_Z10_3:
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exrl %r4,.L_Z10_18
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.L_Z10_4:
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br %r14
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.L_Z10_15:
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cgfi %r5,163840 # Switch to mvcle for >40MB
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jh __memset_mvcle
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.L_Z10_14:
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pfd 2,1024(%r1)
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mvc 1(256,%r1),0(%r1)
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la %r1,256(%r1)
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brctg %r5,.L_Z10_14
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j .L_Z10_3
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.L_Z10_18:
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mvc 1(1,%r1),0(%r1)
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END(MEMSET_Z10)
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#endif /* HAVE_MEMSET_Z10 */
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#if HAVE_MEMSET_Z196
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ENTRY(BZERO_Z196)
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.machine "z196"
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.machinemode "zarch_nohighgprs"
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lgr %r4,%r3
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xr %r3,%r3
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j .L_Z196_start
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END(BZERO_Z196)
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ENTRY(MEMSET_Z196)
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.L_Z196_start:
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.machine "z196"
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.machinemode "zarch_nohighgprs"
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# if !defined __s390x__
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llgfr %r4,%r4
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# endif /* !defined __s390x__ */
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clgfi %r4,1
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jl .L_Z196_4 # n == 0
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stc %r3,0(%r2)
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je .L_Z196_4 # n == 1
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aghi %r4,-2
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lgr %r1,%r2
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risbg %r5,%r4,8,128+63,56 # r5 = n / 256
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jne .L_Z196_1 # Jump away if r5 != 0
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.L_Z196_3:
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exrl %r4,.L_Z196_17
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.L_Z196_4:
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br %r14
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.L_Z196_1:
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cgfi %r5,1048576
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jh __memset_mvcle # Switch to mvcle for >256MB
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.L_Z196_2:
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pfd 2,1024(%r1)
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mvc 1(255,%r1),0(%r1)
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aghi %r5,-1
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la %r1,256(%r1)
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stc %r3,0(%r1)
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jne .L_Z196_2
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j .L_Z196_3
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.L_Z196_17:
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mvc 1(1,%r1),0(%r1)
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END(MEMSET_Z196)
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#endif /* HAVE_MEMSET_Z196 */
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#if HAVE_MEMSET_MVCLE
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ENTRY(__memset_mvcle)
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aghi %r4,2 # take back the change done by the caller
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lgr %r0,%r2 # save source address
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lgr %r1,%r3 # move pad byte to R1
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lgr %r3,%r4 # move length to r3
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sgr %r4,%r4 # no source for MVCLE, only a pad byte
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sgr %r5,%r5
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.L0: mvcle %r2,%r4,0(%r1) # thats it, MVCLE is your friend
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jo .L0
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lgr %r2,%r0 # return value is source address
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.L1:
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br %r14
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END(__memset_mvcle)
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#endif /* HAVE_MEMSET_MVCLE */
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#if ! HAVE_MEMSET_IFUNC
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/* If we don't use ifunc, define an alias for memset here.
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Otherwise see sysdeps/s390/memset.c. */
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strong_alias (MEMSET_DEFAULT, memset)
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/* Same for bzero. If ifunc is used, see
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sysdeps/s390/bzero.c. */
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strong_alias (BZERO_DEFAULT, __bzero)
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weak_alias (__bzero, bzero)
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#endif
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#if defined SHARED && IS_IN (libc)
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/* Defines the internal symbol.
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Compare to libc_hidden_builtin_def (memset) in string/memset.c. */
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strong_alias (MEMSET_DEFAULT, __GI_memset)
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#endif
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