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glibc/SOURCES/glibc-rh1659438-6.patch

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commit 6c6b8c747096d74b900e2711b9b0d463677f6d31
Author: Stefan Liebler <stli@linux.ibm.com>
Date: Tue Dec 18 13:57:05 2018 +0100
S390: Unify 31/64bit memcmp.
The implementation of memcmp for s390-32 (31bit) and
s390-64 (64bit) is nearly the same.
This patch unifies it for maintability reasons.
__memcmp_z10 and __memcmp_z196 differs between 31 and 64bit:
-31bit needs .machinemode "zarch_nohighgprs" and llgfr %r4,%r4
-lr vs lgr and some other instructions:
But lgr and co can be also used on 31bit as this ifunc variant
is only called if we are on a zarch machine.
__memcmp_default differs between 31 and 64bit:
-Some 31bit vs 64bit instructions (e.g. ltr vs ltgr.
Solved with 31/64 specific instruction macros).
-The address of mvc instruction is setup in different ways
(larl vs bras). Solved with #if defined __s390x__.
Otherwise 31/64bit implementation has the same structure of the code.
ChangeLog:
* sysdeps/s390/s390-64/memcmp.S: Move to ...
* sysdeps/s390/memcmp.S: ... here.
Adjust to be usable for 31/64bit.
* sysdeps/s390/s390-32/memcmp.S: Delete File.
* sysdeps/s390/multiarch/Makefile (sysdep_routines): Add memcmp.
* sysdeps/s390/s390-32/multiarch/Makefile (sysdep_routines):
Remove memcmp.
* sysdeps/s390/s390-64/multiarch/Makefile: Likewise.
* sysdeps/s390/s390-64/multiarch/memcmp-s390x.S: Move to ...
* sysdeps/s390/multiarch/memcmp-s390x.S: ... here.
Adjust to be usable for 31/64bit.
* sysdeps/s390/s390-32/multiarch/memcmp-s390.S: Delete File.
* sysdeps/s390/s390-64/multiarch/memcmp.c: Move to ...
* sysdeps/s390/multiarch/memcmp.c: ... here.
* sysdeps/s390/s390-32/multiarch/memcmp.c: Delete File.
diff --git a/sysdeps/s390/s390-64/memcmp.S b/sysdeps/s390/memcmp.S
similarity index 60%
rename from sysdeps/s390/s390-64/memcmp.S
rename to sysdeps/s390/memcmp.S
index 005b19de45fcd883..751293a99e34f530 100644
--- a/sysdeps/s390/s390-64/memcmp.S
+++ b/sysdeps/s390/memcmp.S
@@ -1,4 +1,4 @@
-/* memcmp - compare two memory blocks. 64 bit S/390 version.
+/* 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.
@@ -26,34 +26,62 @@
%r4 = number of bytes to compare. */
.text
+#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__ */
+
#ifdef USE_MULTIARCH
ENTRY(__memcmp_default)
#else
ENTRY(memcmp)
#endif
+#if defined __s390x__
.machine "z900"
- ltgr %r4,%r4
- je .L_Z900_4
- aghi %r4,-1
+#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
- ltgr %r1,%r1
- jne .L_Z900_12
-.L_Z900_3:
- larl %r1,.L_Z900_15
- ex %r4,0(%r1)
-.L_Z900_4:
+ 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_12:
+.L_Z900_G5_12:
clc 0(256,%r3),0(%r2)
- jne .L_Z900_4
+ jne .L_Z900_G5_4
la %r3,256(%r3)
la %r2,256(%r2)
- brctg %r1,.L_Z900_12
- j .L_Z900_3
-.L_Z900_15:
+ BRCTG %r1,.L_Z900_G5_12
+ j .L_Z900_G5_3
+.L_Z900_G5_15:
clc 0(1,%r3),0(%r2)
#ifdef USE_MULTIARCH
END(__memcmp_default)
@@ -62,3 +90,7 @@ END(memcmp)
libc_hidden_builtin_def (memcmp)
weak_alias (memcmp, bcmp)
#endif
+
+#undef LTGR
+#undef AGHI
+#undef BRCTG
diff --git a/sysdeps/s390/multiarch/Makefile b/sysdeps/s390/multiarch/Makefile
index c893ebc5659fd4ae..53dd8654d73677db 100644
--- a/sysdeps/s390/multiarch/Makefile
+++ b/sysdeps/s390/multiarch/Makefile
@@ -19,7 +19,8 @@ sysdep_routines += strlen strlen-vx strlen-c \
rawmemchr rawmemchr-vx rawmemchr-c \
memccpy memccpy-vx memccpy-c \
memrchr memrchr-vx memrchr-c \
- mempcpy
+ mempcpy \
+ memcmp memcmp-s390x
endif
ifeq ($(subdir),wcsmbs)
diff --git a/sysdeps/s390/s390-64/multiarch/memcmp-s390x.S b/sysdeps/s390/multiarch/memcmp-s390x.S
similarity index 89%
rename from sysdeps/s390/s390-64/multiarch/memcmp-s390x.S
rename to sysdeps/s390/multiarch/memcmp-s390x.S
index 35f9bf9cf72da503..6321737acec821ec 100644
--- a/sysdeps/s390/s390-64/multiarch/memcmp-s390x.S
+++ b/sysdeps/s390/multiarch/memcmp-s390x.S
@@ -1,4 +1,4 @@
-/* CPU specific memcmp implementations. 64 bit S/390 version.
+/* CPU specific memcmp implementations. 31/64 bit S/390 version.
Copyright (C) 2012-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
@@ -31,6 +31,10 @@
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
@@ -64,6 +68,10 @@ END(__memcmp_z196)
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
diff --git a/sysdeps/s390/s390-32/multiarch/memcmp.c b/sysdeps/s390/multiarch/memcmp.c
similarity index 100%
rename from sysdeps/s390/s390-32/multiarch/memcmp.c
rename to sysdeps/s390/multiarch/memcmp.c
diff --git a/sysdeps/s390/s390-32/memcmp.S b/sysdeps/s390/s390-32/memcmp.S
deleted file mode 100644
index f9ad0bc745daf05f..0000000000000000
--- a/sysdeps/s390/s390-32/memcmp.S
+++ /dev/null
@@ -1,66 +0,0 @@
-/* memcmp - compare two memory blocks. 32 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"
-
-/* INPUT PARAMETERS
- %r2 = address of first memory area
- %r3 = address of second memory area
- %r4 = number of bytes to compare. */
-
- .text
-#ifdef USE_MULTIARCH
-ENTRY(__memcmp_default)
-#else
-ENTRY(memcmp)
-#endif
- .machine "g5"
- basr %r5,0
-.L_G5_16:
- ltr %r4,%r4
- je .L_G5_4
- ahi %r4,-1
- lr %r1,%r4
- srl %r1,8
- ltr %r1,%r1
- jne .L_G5_12
- ex %r4,.L_G5_17-.L_G5_16(%r5)
-.L_G5_4:
- ipm %r2
- sll %r2,2
- sra %r2,30
- br %r14
-.L_G5_12:
- clc 0(256,%r3),0(%r2)
- jne .L_G5_4
- la %r3,256(%r3)
- la %r2,256(%r2)
- brct %r1,.L_G5_12
- ex %r4,.L_G5_17-.L_G5_16(%r5)
- j .L_G5_4
-.L_G5_17:
- clc 0(1,%r3),0(%r2)
-#ifdef USE_MULTIARCH
-END(__memcmp_default)
-#else
-END(memcmp)
-libc_hidden_builtin_def (memcmp)
-weak_alias(memcmp, bcmp)
-#endif
diff --git a/sysdeps/s390/s390-32/multiarch/Makefile b/sysdeps/s390/s390-32/multiarch/Makefile
index 4b11e28656ac19ab..82a7492eb8436479 100644
--- a/sysdeps/s390/s390-32/multiarch/Makefile
+++ b/sysdeps/s390/s390-32/multiarch/Makefile
@@ -1,3 +1,3 @@
ifeq ($(subdir),string)
-sysdep_routines += memcpy memcpy-s390 memcmp memcmp-s390
+sysdep_routines += memcpy memcpy-s390
endif
diff --git a/sysdeps/s390/s390-32/multiarch/memcmp-s390.S b/sysdeps/s390/s390-32/multiarch/memcmp-s390.S
deleted file mode 100644
index e53b508c98bebeba..0000000000000000
--- a/sysdeps/s390/s390-32/multiarch/memcmp-s390.S
+++ /dev/null
@@ -1,107 +0,0 @@
-/* CPU specific memcmp implementations. 32 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"
-
-/* INPUT PARAMETERS
- %r2 = address of first memory area
- %r3 = address of second memory area
- %r4 = number of bytes to compare. */
-
- .text
-
-#if IS_IN (libc)
-
-ENTRY(__memcmp_z196)
- .machine "z196"
- .machinemode "zarch_nohighgprs"
- ltr %r4,%r4
- je .L_Z196_4
- ahi %r4,-1
- srlk %r1,%r4,8
- ltr %r1,%r1
- jne .L_Z196_2
-.L_Z196_3:
- exrl %r4,.L_Z196_14
-.L_Z196_4:
- ipm %r2
- sll %r2,2
- sra %r2,30
- br %r14
-.L_Z196_17:
- la %r3,256(%r3)
- la %r2,256(%r2)
- ahi %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
- sll %r2,2
- sra %r2,30
- br %r14
-.L_Z196_14:
- clc 0(1,%r3),0(%r2)
-END(__memcmp_z196)
-
-ENTRY(__memcmp_z10)
- .machine "z10"
- .machinemode "zarch_nohighgprs"
- ltr %r4,%r4
- je .L_Z10_4
- ahi %r4,-1
- lr %r1,%r4
- srl %r1,8
- cijlh %r1,0,.L_Z10_12
-.L_Z10_3:
- exrl %r4,.L_Z10_15
-.L_Z10_4:
- ipm %r2
- sll %r2,2
- sra %r2,30
- 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)
- brct %r1,.L_Z10_12
- j .L_Z10_3
-.L_Z10_15:
- clc 0(1,%r3),0(%r2)
-END(__memcmp_z10)
-
-#endif /* IS_IN (libc) */
-
-#include "../memcmp.S"
-
-#if !IS_IN (libc)
-.globl memcmp
-.set memcmp,__memcmp_default
-.weak bcmp
-.set bcmp,__memcmp_default
-#elif defined SHARED && IS_IN (libc)
-.globl __GI_memcmp
-.set __GI_memcmp,__memcmp_default
-#endif
diff --git a/sysdeps/s390/s390-64/multiarch/Makefile b/sysdeps/s390/s390-64/multiarch/Makefile
index e4870c7ee177ad0d..8a043e3327a1527a 100644
--- a/sysdeps/s390/s390-64/multiarch/Makefile
+++ b/sysdeps/s390/s390-64/multiarch/Makefile
@@ -1,3 +1,3 @@
ifeq ($(subdir),string)
-sysdep_routines += memcpy memcpy-s390x memcmp memcmp-s390x
+sysdep_routines += memcpy memcpy-s390x
endif
diff --git a/sysdeps/s390/s390-64/multiarch/memcmp.c b/sysdeps/s390/s390-64/multiarch/memcmp.c
deleted file mode 100644
index 1e6f31806e172d7d..0000000000000000
--- a/sysdeps/s390/s390-64/multiarch/memcmp.c
+++ /dev/null
@@ -1,27 +0,0 @@
-/* Multiple versions of memcmp.
- Copyright (C) 2015-2018 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/>. */
-
-#if IS_IN (libc)
-# define memcmp __redirect_memcmp
-# include <string.h>
-# undef memcmp
-# include <ifunc-resolve.h>
-
-s390_libc_ifunc (__redirect_memcmp, __memcmp, memcmp)
-weak_alias (memcmp, bcmp);
-#endif
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