9894127d20
No bug. This commit adds hidden defs for all declarations of __memcmpeq. This enables usage of __memcmpeq without the PLT for usage internal to GLIBC.
176 lines
4 KiB
ArmAsm
176 lines
4 KiB
ArmAsm
/* memcmp - compare two memory blocks. 31/64 bit S/390 version.
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Copyright (C) 2012-2021 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-memcmp.h>
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/* INPUT PARAMETERS
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%r2 = address of first memory area
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%r3 = address of second memory area
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%r4 = number of bytes to compare. */
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.text
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#if HAVE_MEMCMP_Z900_G5
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# if defined __s390x__
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# define LTGR ltgr
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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 AGHI ahi
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# define BRCTG brct
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# endif /* ! defined __s390x__ */
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ENTRY(MEMCMP_Z900_G5)
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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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basr %r5,0
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.L_Z900_G5_16:
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# define Z900_G5_EX_D .L_Z900_G5_15-.L_Z900_G5_16
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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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AGHI %r4,-1
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# if defined __s390x__
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srlg %r1,%r4,8
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larl %r5,.L_Z900_G5_15
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# define Z900_G5_EX_D 0
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# else
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lr %r1,%r4
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srl %r1,8
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# endif /* ! defined __s390x__ */
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LTGR %r1,%r1
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jne .L_Z900_G5_12
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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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ipm %r2
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# if defined __s390x__
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sllg %r2,%r2,34
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srag %r2,%r2,62
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# else
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sll %r2,2
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sra %r2,30
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# endif /* ! defined __s390x__ */
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br %r14
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.L_Z900_G5_12:
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clc 0(256,%r3),0(%r2)
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jne .L_Z900_G5_4
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la %r3,256(%r3)
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la %r2,256(%r2)
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BRCTG %r1,.L_Z900_G5_12
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j .L_Z900_G5_3
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.L_Z900_G5_15:
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clc 0(1,%r3),0(%r2)
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END(MEMCMP_Z900_G5)
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# undef LTGR
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# undef AGHI
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# undef BRCTG
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#endif /* HAVE_MEMCMP_Z900_G5 */
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#if HAVE_MEMCMP_Z10
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ENTRY(MEMCMP_Z10)
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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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ltgr %r4,%r4
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je .L_Z10_4
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aghi %r4,-1
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srlg %r1,%r4,8
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cgijlh %r1,0,.L_Z10_12
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.L_Z10_3:
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exrl %r4,.L_Z10_15
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.L_Z10_4:
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ipm %r2
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sllg %r2,%r2,34
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srag %r2,%r2,62
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br %r14
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.L_Z10_12:
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pfd 1,512(%r3)
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pfd 1,512(%r2)
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clc 0(256,%r3),0(%r2)
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jne .L_Z10_4
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la %r3,256(%r3)
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la %r2,256(%r2)
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brctg %r1,.L_Z10_12
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j .L_Z10_3
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.L_Z10_15:
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clc 0(1,%r3),0(%r2)
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END(MEMCMP_Z10)
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#endif /* HAVE_MEMCMP_Z10 */
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#if HAVE_MEMCMP_Z196
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ENTRY(MEMCMP_Z196)
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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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ltgr %r4,%r4
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je .L_Z196_4
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aghi %r4,-1
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srlg %r1,%r4,8
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ltgr %r1,%r1
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jne .L_Z196_2
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.L_Z196_3:
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exrl %r4,.L_Z196_14
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.L_Z196_4:
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ipm %r2
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sllg %r2,%r2,34
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srag %r2,%r2,62
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br %r14
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.L_Z196_17:
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la %r3,256(%r3)
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la %r2,256(%r2)
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aghi %r1,-1
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je .L_Z196_3
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.L_Z196_2:
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pfd 1,512(%r3)
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pfd 1,512(%r2)
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clc 0(256,%r3),0(%r2)
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je .L_Z196_17
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ipm %r2
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sllg %r2,%r2,34
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srag %r2,%r2,62
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br %r14
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.L_Z196_14:
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clc 0(1,%r3),0(%r2)
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END(MEMCMP_Z196)
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#endif /* HAVE_MEMCMP_Z196 */
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#if ! HAVE_MEMCMP_IFUNC
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/* If we don't use ifunc, define an alias for memcmp here.
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Otherwise see sysdeps/s390/memcmp.c. */
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strong_alias (MEMCMP_DEFAULT, memcmp)
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weak_alias (memcmp, bcmp)
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strong_alias (memcmp, __memcmpeq)
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libc_hidden_def (__memcmpeq)
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#endif
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#if defined SHARED && IS_IN (libc)
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/* Defines the internal symbols.
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Compare to libc_hidden_builtin_def (memcmp) in string/memcmp.c. */
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strong_alias (MEMCMP_DEFAULT, __GI_memcmp)
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#endif
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