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bdc76f |
commit 6c6b8c747096d74b900e2711b9b0d463677f6d31
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Author: Stefan Liebler <stli@linux.ibm.com>
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Date: Tue Dec 18 13:57:05 2018 +0100
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S390: Unify 31/64bit memcmp.
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bdc76f |
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The implementation of memcmp for s390-32 (31bit) and
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s390-64 (64bit) is nearly the same.
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This patch unifies it for maintability reasons.
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__memcmp_z10 and __memcmp_z196 differs between 31 and 64bit:
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-31bit needs .machinemode "zarch_nohighgprs" and llgfr %r4,%r4
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-lr vs lgr and some other instructions:
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But lgr and co can be also used on 31bit as this ifunc variant
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is only called if we are on a zarch machine.
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__memcmp_default differs between 31 and 64bit:
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-Some 31bit vs 64bit instructions (e.g. ltr vs ltgr.
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Solved with 31/64 specific instruction macros).
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-The address of mvc instruction is setup in different ways
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(larl vs bras). Solved with #if defined __s390x__.
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Otherwise 31/64bit implementation has the same structure of the code.
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ChangeLog:
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* sysdeps/s390/s390-64/memcmp.S: Move to ...
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* sysdeps/s390/memcmp.S: ... here.
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bdc76f |
Adjust to be usable for 31/64bit.
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* sysdeps/s390/s390-32/memcmp.S: Delete File.
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* sysdeps/s390/multiarch/Makefile (sysdep_routines): Add memcmp.
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* sysdeps/s390/s390-32/multiarch/Makefile (sysdep_routines):
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Remove memcmp.
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* sysdeps/s390/s390-64/multiarch/Makefile: Likewise.
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* sysdeps/s390/s390-64/multiarch/memcmp-s390x.S: Move to ...
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* sysdeps/s390/multiarch/memcmp-s390x.S: ... here.
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bdc76f |
Adjust to be usable for 31/64bit.
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* sysdeps/s390/s390-32/multiarch/memcmp-s390.S: Delete File.
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* sysdeps/s390/s390-64/multiarch/memcmp.c: Move to ...
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* sysdeps/s390/multiarch/memcmp.c: ... here.
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* sysdeps/s390/s390-32/multiarch/memcmp.c: Delete File.
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diff --git a/sysdeps/s390/s390-64/memcmp.S b/sysdeps/s390/memcmp.S
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similarity index 60%
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rename from sysdeps/s390/s390-64/memcmp.S
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rename to sysdeps/s390/memcmp.S
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index 005b19de45fcd883..751293a99e34f530 100644
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--- a/sysdeps/s390/s390-64/memcmp.S
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+++ b/sysdeps/s390/memcmp.S
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@@ -1,4 +1,4 @@
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-/* memcmp - compare two memory blocks. 64 bit S/390 version.
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+/* memcmp - compare two memory blocks. 31/64 bit S/390 version.
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Copyright (C) 2012-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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@@ -26,34 +26,62 @@
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%r4 = number of bytes to compare. */
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.text
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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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+
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#ifdef USE_MULTIARCH
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ENTRY(__memcmp_default)
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#else
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ENTRY(memcmp)
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#endif
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+#if defined __s390x__
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.machine "z900"
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- ltgr %r4,%r4
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- je .L_Z900_4
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- aghi %r4,-1
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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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- ltgr %r1,%r1
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- jne .L_Z900_12
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-.L_Z900_3:
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- larl %r1,.L_Z900_15
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- ex %r4,0(%r1)
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-.L_Z900_4:
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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_12:
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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_4
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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_12
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- j .L_Z900_3
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-.L_Z900_15:
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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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#ifdef USE_MULTIARCH
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END(__memcmp_default)
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@@ -62,3 +90,7 @@ END(memcmp)
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libc_hidden_builtin_def (memcmp)
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weak_alias (memcmp, bcmp)
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#endif
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+
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+#undef LTGR
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+#undef AGHI
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+#undef BRCTG
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diff --git a/sysdeps/s390/multiarch/Makefile b/sysdeps/s390/multiarch/Makefile
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index c893ebc5659fd4ae..53dd8654d73677db 100644
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--- a/sysdeps/s390/multiarch/Makefile
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+++ b/sysdeps/s390/multiarch/Makefile
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@@ -19,7 +19,8 @@ sysdep_routines += strlen strlen-vx strlen-c \
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rawmemchr rawmemchr-vx rawmemchr-c \
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memccpy memccpy-vx memccpy-c \
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memrchr memrchr-vx memrchr-c \
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- mempcpy
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+ mempcpy \
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+ memcmp memcmp-s390x
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endif
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ifeq ($(subdir),wcsmbs)
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diff --git a/sysdeps/s390/s390-64/multiarch/memcmp-s390x.S b/sysdeps/s390/multiarch/memcmp-s390x.S
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similarity index 89%
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rename from sysdeps/s390/s390-64/multiarch/memcmp-s390x.S
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rename to sysdeps/s390/multiarch/memcmp-s390x.S
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index 35f9bf9cf72da503..6321737acec821ec 100644
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--- a/sysdeps/s390/s390-64/multiarch/memcmp-s390x.S
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+++ b/sysdeps/s390/multiarch/memcmp-s390x.S
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@@ -1,4 +1,4 @@
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-/* CPU specific memcmp implementations. 64 bit S/390 version.
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+/* CPU specific memcmp implementations. 31/64 bit S/390 version.
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Copyright (C) 2012-2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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@@ -31,6 +31,10 @@
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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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@@ -64,6 +68,10 @@ END(__memcmp_z196)
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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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diff --git a/sysdeps/s390/s390-32/multiarch/memcmp.c b/sysdeps/s390/multiarch/memcmp.c
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similarity index 100%
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rename from sysdeps/s390/s390-32/multiarch/memcmp.c
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rename to sysdeps/s390/multiarch/memcmp.c
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diff --git a/sysdeps/s390/s390-32/memcmp.S b/sysdeps/s390/s390-32/memcmp.S
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deleted file mode 100644
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index f9ad0bc745daf05f..0000000000000000
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--- a/sysdeps/s390/s390-32/memcmp.S
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+++ /dev/null
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@@ -1,66 +0,0 @@
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-/* memcmp - compare two memory blocks. 32 bit S/390 version.
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- Copyright (C) 2012-2018 Free Software Foundation, Inc.
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- This file is part of the GNU C Library.
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-
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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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-
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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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-
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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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- <http://www.gnu.org/licenses/>. */
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-
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-
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-#include "sysdep.h"
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-#include "asm-syntax.h"
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-
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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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-
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- .text
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-#ifdef USE_MULTIARCH
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-ENTRY(__memcmp_default)
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-#else
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-ENTRY(memcmp)
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-#endif
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- .machine "g5"
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- basr %r5,0
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-.L_G5_16:
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- ltr %r4,%r4
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- je .L_G5_4
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- ahi %r4,-1
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- lr %r1,%r4
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- srl %r1,8
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- ltr %r1,%r1
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- jne .L_G5_12
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- ex %r4,.L_G5_17-.L_G5_16(%r5)
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-.L_G5_4:
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- ipm %r2
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- sll %r2,2
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- sra %r2,30
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- br %r14
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-.L_G5_12:
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- clc 0(256,%r3),0(%r2)
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- jne .L_G5_4
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- la %r3,256(%r3)
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- la %r2,256(%r2)
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- brct %r1,.L_G5_12
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- ex %r4,.L_G5_17-.L_G5_16(%r5)
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bdc76f |
- j .L_G5_4
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-.L_G5_17:
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- clc 0(1,%r3),0(%r2)
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bdc76f |
-#ifdef USE_MULTIARCH
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-END(__memcmp_default)
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-#else
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-END(memcmp)
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-libc_hidden_builtin_def (memcmp)
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-weak_alias(memcmp, bcmp)
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-#endif
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diff --git a/sysdeps/s390/s390-32/multiarch/Makefile b/sysdeps/s390/s390-32/multiarch/Makefile
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index 4b11e28656ac19ab..82a7492eb8436479 100644
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--- a/sysdeps/s390/s390-32/multiarch/Makefile
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+++ b/sysdeps/s390/s390-32/multiarch/Makefile
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@@ -1,3 +1,3 @@
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ifeq ($(subdir),string)
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-sysdep_routines += memcpy memcpy-s390 memcmp memcmp-s390
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+sysdep_routines += memcpy memcpy-s390
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endif
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diff --git a/sysdeps/s390/s390-32/multiarch/memcmp-s390.S b/sysdeps/s390/s390-32/multiarch/memcmp-s390.S
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deleted file mode 100644
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index e53b508c98bebeba..0000000000000000
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bdc76f |
--- a/sysdeps/s390/s390-32/multiarch/memcmp-s390.S
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+++ /dev/null
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@@ -1,107 +0,0 @@
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-/* CPU specific memcmp implementations. 32 bit S/390 version.
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- Copyright (C) 2012-2018 Free Software Foundation, Inc.
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- This file is part of the GNU C Library.
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-
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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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-
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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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-
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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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- <http://www.gnu.org/licenses/>. */
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-
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-
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-#include "sysdep.h"
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-#include "asm-syntax.h"
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-
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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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-
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- .text
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-
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-#if IS_IN (libc)
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-
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-ENTRY(__memcmp_z196)
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- .machine "z196"
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- .machinemode "zarch_nohighgprs"
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- ltr %r4,%r4
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- je .L_Z196_4
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- ahi %r4,-1
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- srlk %r1,%r4,8
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- ltr %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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- sll %r2,2
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- sra %r2,30
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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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- ahi %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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- sll %r2,2
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- sra %r2,30
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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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-
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-ENTRY(__memcmp_z10)
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- .machine "z10"
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- .machinemode "zarch_nohighgprs"
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- ltr %r4,%r4
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- je .L_Z10_4
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- ahi %r4,-1
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- lr %r1,%r4
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- srl %r1,8
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- cijlh %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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- sll %r2,2
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- sra %r2,30
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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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- brct %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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-
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-#endif /* IS_IN (libc) */
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-
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-#include "../memcmp.S"
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-
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-#if !IS_IN (libc)
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-.globl memcmp
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-.set memcmp,__memcmp_default
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-.weak bcmp
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-.set bcmp,__memcmp_default
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-#elif defined SHARED && IS_IN (libc)
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-.globl __GI_memcmp
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-.set __GI_memcmp,__memcmp_default
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-#endif
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diff --git a/sysdeps/s390/s390-64/multiarch/Makefile b/sysdeps/s390/s390-64/multiarch/Makefile
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index e4870c7ee177ad0d..8a043e3327a1527a 100644
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--- a/sysdeps/s390/s390-64/multiarch/Makefile
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+++ b/sysdeps/s390/s390-64/multiarch/Makefile
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@@ -1,3 +1,3 @@
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ifeq ($(subdir),string)
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-sysdep_routines += memcpy memcpy-s390x memcmp memcmp-s390x
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+sysdep_routines += memcpy memcpy-s390x
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endif
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diff --git a/sysdeps/s390/s390-64/multiarch/memcmp.c b/sysdeps/s390/s390-64/multiarch/memcmp.c
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deleted file mode 100644
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index 1e6f31806e172d7d..0000000000000000
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--- a/sysdeps/s390/s390-64/multiarch/memcmp.c
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+++ /dev/null
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bdc76f |
@@ -1,27 +0,0 @@
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-/* Multiple versions of memcmp.
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bdc76f |
- Copyright (C) 2015-2018 Free Software Foundation, Inc.
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bdc76f |
- This file is part of the GNU C Library.
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bdc76f |
-
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bdc76f |
- The GNU C Library is free software; you can redistribute it and/or
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|
bdc76f |
- modify it under the terms of the GNU Lesser General Public
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|
|
bdc76f |
- License as published by the Free Software Foundation; either
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bdc76f |
- version 2.1 of the License, or (at your option) any later version.
|
|
|
bdc76f |
-
|
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bdc76f |
- The GNU C Library is distributed in the hope that it will be useful,
|
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|
bdc76f |
- but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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|
bdc76f |
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
bdc76f |
- Lesser General Public License for more details.
|
|
|
bdc76f |
-
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bdc76f |
- You should have received a copy of the GNU Lesser General Public
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|
bdc76f |
- License along with the GNU C Library; if not, see
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|
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bdc76f |
- <http://www.gnu.org/licenses/>. */
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bdc76f |
-
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bdc76f |
-#if IS_IN (libc)
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bdc76f |
-# define memcmp __redirect_memcmp
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bdc76f |
-# include <string.h>
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bdc76f |
-# undef memcmp
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bdc76f |
-# include <ifunc-resolve.h>
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-
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-s390_libc_ifunc (__redirect_memcmp, __memcmp, memcmp)
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-weak_alias (memcmp, bcmp);
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-#endif
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