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Diffstat (limited to 'sysdeps/s390/memcmp-z900.S')
| -rw-r--r-- | sysdeps/s390/memcmp-z900.S | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/sysdeps/s390/memcmp-z900.S b/sysdeps/s390/memcmp-z900.S new file mode 100644 index 0000000000..c3b3677ba7 --- /dev/null +++ b/sysdeps/s390/memcmp-z900.S @@ -0,0 +1,173 @@ +/* memcmp - compare two memory blocks. 31/64 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" +#include <ifunc-memcmp.h> + +/* INPUT PARAMETERS + %r2 = address of first memory area + %r3 = address of second memory area + %r4 = number of bytes to compare. */ + + .text + +#if HAVE_MEMCMP_Z900_G5 +# if defined __s390x__ +# define LTGR ltgr +# define AGHI aghi +# define BRCTG brctg +# else +# define LTGR ltr +# define AGHI ahi +# define BRCTG brct +# endif /* ! defined __s390x__ */ +ENTRY(MEMCMP_Z900_G5) +# if defined __s390x__ + .machine "z900" +# else + .machine "g5" + basr %r5,0 +.L_Z900_G5_16: +# define Z900_G5_EX_D .L_Z900_G5_15-.L_Z900_G5_16 +# endif /* ! defined __s390x__ */ + LTGR %r4,%r4 + je .L_Z900_G5_4 + AGHI %r4,-1 +# if defined __s390x__ + srlg %r1,%r4,8 + larl %r5,.L_Z900_G5_15 +# define Z900_G5_EX_D 0 +# else + lr %r1,%r4 + srl %r1,8 +# endif /* ! defined __s390x__ */ + LTGR %r1,%r1 + jne .L_Z900_G5_12 +.L_Z900_G5_3: + ex %r4,Z900_G5_EX_D(%r5) +.L_Z900_G5_4: + ipm %r2 +# if defined __s390x__ + sllg %r2,%r2,34 + srag %r2,%r2,62 +# else + sll %r2,2 + sra %r2,30 +# endif /* ! defined __s390x__ */ + br %r14 +.L_Z900_G5_12: + clc 0(256,%r3),0(%r2) + jne .L_Z900_G5_4 + la %r3,256(%r3) + la %r2,256(%r2) + BRCTG %r1,.L_Z900_G5_12 + j .L_Z900_G5_3 +.L_Z900_G5_15: + clc 0(1,%r3),0(%r2) +END(MEMCMP_Z900_G5) +# undef LTGR +# undef AGHI +# undef BRCTG +#endif /* HAVE_MEMCMP_Z900_G5 */ + +#if HAVE_MEMCMP_Z10 +ENTRY(MEMCMP_Z10) + .machine "z10" + .machinemode "zarch_nohighgprs" +# if !defined __s390x__ + llgfr %r4,%r4 +# endif /* !defined __s390x__ */ + ltgr %r4,%r4 + je .L_Z10_4 + aghi %r4,-1 + srlg %r1,%r4,8 + cgijlh %r1,0,.L_Z10_12 +.L_Z10_3: + exrl %r4,.L_Z10_15 +.L_Z10_4: + ipm %r2 + sllg %r2,%r2,34 + srag %r2,%r2,62 + br %r14 +.L_Z10_12: + pfd 1,512(%r3) + pfd 1,512(%r2) + clc 0(256,%r3),0(%r2) + jne .L_Z10_4 + la %r3,256(%r3) + la %r2,256(%r2) + brctg %r1,.L_Z10_12 + j .L_Z10_3 +.L_Z10_15: + clc 0(1,%r3),0(%r2) +END(MEMCMP_Z10) +#endif /* HAVE_MEMCMP_Z10 */ + +#if HAVE_MEMCMP_Z196 +ENTRY(MEMCMP_Z196) + .machine "z196" + .machinemode "zarch_nohighgprs" +# if !defined __s390x__ + llgfr %r4,%r4 +# endif /* !defined __s390x__ */ + ltgr %r4,%r4 + je .L_Z196_4 + aghi %r4,-1 + srlg %r1,%r4,8 + ltgr %r1,%r1 + jne .L_Z196_2 +.L_Z196_3: + exrl %r4,.L_Z196_14 +.L_Z196_4: + ipm %r2 + sllg %r2,%r2,34 + srag %r2,%r2,62 + br %r14 +.L_Z196_17: + la %r3,256(%r3) + la %r2,256(%r2) + aghi %r1,-1 + je .L_Z196_3 +.L_Z196_2: + pfd 1,512(%r3) + pfd 1,512(%r2) + clc 0(256,%r3),0(%r2) + je .L_Z196_17 + ipm %r2 + sllg %r2,%r2,34 + srag %r2,%r2,62 + br %r14 +.L_Z196_14: + clc 0(1,%r3),0(%r2) +END(MEMCMP_Z196) +#endif /* HAVE_MEMCMP_Z196 */ + +#if ! HAVE_MEMCMP_IFUNC +/* If we don't use ifunc, define an alias for memcmp here. + Otherwise see sysdeps/s390/memcmp.c. */ +strong_alias (MEMCMP_DEFAULT, memcmp) +weak_alias (memcmp, bcmp) +#endif + +#if defined SHARED && IS_IN (libc) +/* Defines the internal symbols. + Compare to libc_hidden_builtin_def (memcmp) in string/memcmp.c. */ +strong_alias (MEMCMP_DEFAULT, __GI_memcmp) +#endif |