diff options
Diffstat (limited to 'sysdeps/s390/memset-z900.S')
| -rw-r--r-- | sysdeps/s390/memset-z900.S | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/sysdeps/s390/memset-z900.S b/sysdeps/s390/memset-z900.S new file mode 100644 index 0000000000..eaf13402bd --- /dev/null +++ b/sysdeps/s390/memset-z900.S @@ -0,0 +1,186 @@ +/* Set a block of memory to some byte value. 31/64 bit S/390 version. + Copyright (C) 2001-2018 Free Software Foundation, Inc. + Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). + 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" +#include <ifunc-memset.h> + +/* INPUT PARAMETERS + %r2 = address of memory area + %r3 = byte to fill memory with + %r4 = number of bytes to fill. */ + + .text + +#if HAVE_MEMSET_Z900_G5 +# 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(MEMSET_Z900_G5) +#if defined __s390x__ + .machine "z900" +#else + .machine "g5" +#endif /* ! defined __s390x__ */ + LTGR %r4,%r4 + je .L_Z900_G5_4 + stc %r3,0(%r2) + CGHI %r4,1 + LGR %r1,%r2 + je .L_Z900_G5_4 + AGHI %r4,-2 +#if defined __s390x__ + larl %r5,.L_Z900_G5_18 + srlg %r3,%r4,8 +# define Z900_G5_EX_D 0 +#else + basr %r5,0 +.L_Z900_G5_19: +# define Z900_G5_EX_D .L_Z900_G5_18-.L_Z900_G5_19 + lr %r3,%r4 + srl %r3,8 +#endif /* ! defined __s390x__ */ + LTGR %r3,%r3 + jne .L_Z900_G5_14 +.L_Z900_G5_3: + ex %r4,Z900_G5_EX_D(%r5) +.L_Z900_G5_4: + br %r14 +.L_Z900_G5_14: + mvc 1(256,%r1),0(%r1) + la %r1,256(%r1) + BRCTG %r3,.L_Z900_G5_14 + j .L_Z900_G5_3 +.L_Z900_G5_18: + mvc 1(1,%r1),0(%r1) +END(MEMSET_Z900_G5) +# undef LTGR +# undef CGHI +# undef LGR +# undef AGHI +# undef BRCTG +#endif /* HAVE_MEMSET_Z900_G5 */ + +#if HAVE_MEMSET_Z10 +ENTRY(MEMSET_Z10) + .machine "z10" + .machinemode "zarch_nohighgprs" +# if !defined __s390x__ + llgfr %r4,%r4 +# endif /* !defined __s390x__ */ + cgije %r4,0,.L_Z10_4 + stc %r3,0(%r2) + lgr %r1,%r2 + cgije %r4,1,.L_Z10_4 + aghi %r4,-2 + srlg %r5,%r4,8 + cgijlh %r5,0,.L_Z10_15 +.L_Z10_3: + exrl %r4,.L_Z10_18 +.L_Z10_4: + br %r14 +.L_Z10_15: + cgfi %r5,163840 # Switch to mvcle for >40MB + jh __memset_mvcle +.L_Z10_14: + pfd 2,1024(%r1) + mvc 1(256,%r1),0(%r1) + la %r1,256(%r1) + brctg %r5,.L_Z10_14 + j .L_Z10_3 +.L_Z10_18: + mvc 1(1,%r1),0(%r1) +END(MEMSET_Z10) +#endif /* HAVE_MEMSET_Z10 */ + +#if HAVE_MEMSET_Z196 +ENTRY(MEMSET_Z196) + .machine "z196" + .machinemode "zarch_nohighgprs" +# if !defined __s390x__ + llgfr %r4,%r4 +# endif /* !defined __s390x__ */ + ltgr %r4,%r4 + je .L_Z196_4 + stc %r3,0(%r2) + lgr %r1,%r2 + cghi %r4,1 + je .L_Z196_4 + aghi %r4,-2 + srlg %r5,%r4,8 + ltgr %r5,%r5 + jne .L_Z196_1 +.L_Z196_3: + exrl %r4,.L_Z196_17 +.L_Z196_4: + br %r14 +.L_Z196_1: + cgfi %r5,1048576 + jh __memset_mvcle # Switch to mvcle for >256MB +.L_Z196_2: + pfd 2,1024(%r1) + mvc 1(256,%r1),0(%r1) + aghi %r5,-1 + la %r1,256(%r1) + jne .L_Z196_2 + j .L_Z196_3 +.L_Z196_17: + mvc 1(1,%r1),0(%r1) +END(MEMSET_Z196) +#endif /* HAVE_MEMSET_Z196 */ + +#if HAVE_MEMSET_MVCLE +ENTRY(__memset_mvcle) + aghi %r4,2 # take back the change done by the caller + lgr %r0,%r2 # save source address + lgr %r1,%r3 # move pad byte to R1 + lgr %r3,%r4 # move length to r3 + sgr %r4,%r4 # no source for MVCLE, only a pad byte + sgr %r5,%r5 +.L0: mvcle %r2,%r4,0(%r1) # thats it, MVCLE is your friend + jo .L0 + lgr %r2,%r0 # return value is source address +.L1: + br %r14 +END(__memset_mvcle) +#endif /* HAVE_MEMSET_MVCLE */ + +#if ! HAVE_MEMSET_IFUNC +/* If we don't use ifunc, define an alias for memset here. + Otherwise see sysdeps/s390/memset.c. */ +strong_alias (MEMSET_DEFAULT, memset) +#endif + +#if defined SHARED && IS_IN (libc) +/* Defines the internal symbol. + Compare to libc_hidden_builtin_def (memset) in string/memset.c. */ +strong_alias (MEMSET_DEFAULT, __GI_memset) +#endif |