File 0034-S390-Implement-mempcpy-with-help-of-memcpy... of Package glibc-utils

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File 0034-S390-Implement-mempcpy-with-help-of-memcpy.-BZ-19765.patch of Package glibc-utils (Revision cbf66bfdedd692a006606b565b77257a)

Currently displaying revision cbf66bfdedd692a006606b565b77257a , Show latest

2016-05-24  Stefan Liebler  <stli@linux.vnet.ibm.com>

[BZ #19765]
	* sysdeps/s390/mempcpy.S: New File.
	* sysdeps/s390/multiarch/mempcpy.c: Likewise.
	* sysdeps/s390/multiarch/Makefile (sysdep_routines): Add mempcpy.
	* sysdeps/s390/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list):
	Add mempcpy variants.
	* sysdeps/s390/s390-32/memcpy.S: Add mempcpy entry point.
	(memcpy): Adjust to be usable from mempcpy entry point.
	(__memcpy_mvcle): Likewise.
	* sysdeps/s390/s390-64/memcpy.S: Likewise.
	* sysdeps/s390/s390-32/multiarch/memcpy-s390.S: Add entry points
	____mempcpy_z196, ____mempcpy_z10 and add __GI_ symbols for mempcpy.
	(__memcpy_z196): Adjust to be usable from mempcpy entry point.
	(__memcpy_z10): Likewise.
	* sysdeps/s390/s390-64/multiarch/memcpy-s390x.S: Likewise.

Index: glibc-2.22/sysdeps/s390/mempcpy.S
===================================================================
--- /dev/null
+++ glibc-2.22/sysdeps/s390/mempcpy.S
@@ -0,0 +1,19 @@
+/* CPU specific mempcpy without multiarch - 32/64 bit S/390 version.
+   Copyright (C) 2016 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/>.  */
+
+/* mempcpy is implemented in memcpy.S.  */
Index: glibc-2.22/sysdeps/s390/multiarch/Makefile
===================================================================
--- glibc-2.22.orig/sysdeps/s390/multiarch/Makefile
+++ glibc-2.22/sysdeps/s390/multiarch/Makefile
@@ -18,7 +18,8 @@ sysdep_routines += strlen strlen-vx strl
 		   memchr memchr-vx \
 		   rawmemchr rawmemchr-vx rawmemchr-c \
 		   memccpy memccpy-vx memccpy-c \
-		   memrchr memrchr-vx memrchr-c
+		   memrchr memrchr-vx memrchr-c \
+		   mempcpy
 endif
 
 ifeq ($(subdir),wcsmbs)
Index: glibc-2.22/sysdeps/s390/multiarch/ifunc-impl-list.c
===================================================================
--- glibc-2.22.orig/sysdeps/s390/multiarch/ifunc-impl-list.c
+++ glibc-2.22/sysdeps/s390/multiarch/ifunc-impl-list.c
@@ -69,6 +69,13 @@ __libc_ifunc_impl_list (const char *name
 			      S390_IS_Z10 (stfle_bits), __memcpy_z10)
 	      IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_default))
 
+  IFUNC_IMPL (i, name, mempcpy,
+	      IFUNC_IMPL_ADD (array, i, mempcpy,
+			      S390_IS_Z196 (stfle_bits), ____mempcpy_z196)
+	      IFUNC_IMPL_ADD (array, i, mempcpy,
+			      S390_IS_Z10 (stfle_bits), ____mempcpy_z10)
+	      IFUNC_IMPL_ADD (array, i, mempcpy, 1, ____mempcpy_default))
+
 #endif /* SHARED */
 
 #ifdef HAVE_S390_VX_ASM_SUPPORT
Index: glibc-2.22/sysdeps/s390/multiarch/mempcpy.c
===================================================================
--- /dev/null
+++ glibc-2.22/sysdeps/s390/multiarch/mempcpy.c
@@ -0,0 +1,26 @@
+/* Multiple versions of mempcpy.
+   Copyright (C) 2016 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 defined SHARED && IS_IN (libc)
+# include <ifunc-resolve.h>
+s390_libc_ifunc (__mempcpy)
+
+__asm__ (".weak mempcpy\n\t"
+	 ".set mempcpy,__mempcpy\n\t");
+#endif
Index: glibc-2.22/sysdeps/s390/s390-32/memcpy.S
===================================================================
--- glibc-2.22.orig/sysdeps/s390/s390-32/memcpy.S
+++ glibc-2.22/sysdeps/s390/s390-32/memcpy.S
@@ -25,12 +25,23 @@
      %r3 = address of source memory area
      %r4 = number of bytes to copy.  */
 
-#ifdef USE_MULTIARCH
-ENTRY(__memcpy_default)
-#else
-ENTRY(memcpy)
+       .text
+ENTRY(__mempcpy)
+	.machine "g5"
+	lr      %r1,%r2             # Use as dest
+	la      %r2,0(%r4,%r2)      # Return dest + n
+	j	.L_G5_start
+END(__mempcpy)
+#ifndef USE_MULTIARCH
+libc_hidden_def (__mempcpy)
+weak_alias (__mempcpy, mempcpy)
+libc_hidden_builtin_def (mempcpy)
 #endif
+
+ENTRY(memcpy)
 	.machine "g5"
+	lr      %r1,%r2             # r1: Use as dest ; r2: Return dest
+.L_G5_start:
 	st      %r13,52(%r15)
 	.cfi_offset 13, -44
 	basr    %r13,0
@@ -41,14 +52,13 @@ ENTRY(memcpy)
 	lr      %r5,%r4
 	srl     %r5,8
 	ltr     %r5,%r5
-	lr      %r1,%r2
 	jne     .L_G5_13
 	ex      %r4,.L_G5_17-.L_G5_16(%r13)
 .L_G5_4:
 	l       %r13,52(%r15)
 	br      %r14
 .L_G5_13:
-	chi	%r5,4096             # Switch to mvcle for copies >1MB
+	chi	%r5,4096            # Switch to mvcle for copies >1MB
 	jh	__memcpy_mvcle
 .L_G5_12:
 	mvc     0(256,%r1),0(%r3)
@@ -59,24 +69,24 @@ ENTRY(memcpy)
 	j       .L_G5_4
 .L_G5_17:
 	mvc     0(1,%r1),0(%r3)
-#ifdef USE_MULTIARCH
-END(__memcpy_default)
-#else
 END(memcpy)
+#ifndef USE_MULTIARCH
 libc_hidden_builtin_def (memcpy)
 #endif
 
 ENTRY(__memcpy_mvcle)
-       # Using as standalone function will result in unexpected
-       # results since the length field is incremented by 1 in order to
-       # compensate the changes already done in the functions above.
-       ahi     %r4,1               # length + 1
-       lr      %r5,%r4             # source length
-       lr      %r4,%r3             # source address
-       lr      %r3,%r5             # destination length = source length
+	# Using as standalone function will result in unexpected
+	# results since the length field is incremented by 1 in order to
+	# compensate the changes already done in the functions above.
+	lr      %r0,%r2             # backup return dest [ + n ]
+	ahi     %r4,1               # length + 1
+	lr      %r5,%r4             # source length
+	lr      %r4,%r3             # source address
+	lr      %r2,%r1             # destination address
+	lr      %r3,%r5             # destination length = source length
 .L_MVCLE_1:
-       mvcle   %r2,%r4,0           # thats it, MVCLE is your friend
-       jo      .L_MVCLE_1
-       lr      %r2,%r1             # return destination address
-       br      %r14
+	mvcle   %r2,%r4,0           # thats it, MVCLE is your friend
+	jo      .L_MVCLE_1
+	lr      %r2,%r0             # return destination address
+	br      %r14
 END(__memcpy_mvcle)
Index: glibc-2.22/sysdeps/s390/s390-32/multiarch/memcpy-s390.S
===================================================================
--- glibc-2.22.orig/sysdeps/s390/s390-32/multiarch/memcpy-s390.S
+++ glibc-2.22/sysdeps/s390/s390-32/multiarch/memcpy-s390.S
@@ -29,14 +29,23 @@
 
 #if defined SHARED && IS_IN (libc)
 
+ENTRY(____mempcpy_z196)
+	.machine "z196"
+	.machinemode "zarch_nohighgprs"
+	lr      %r1,%r2         # Use as dest
+	la      %r2,0(%r4,%r2)  # Return dest + n
+	j	.L_Z196_start
+END(____mempcpy_z196)
+
 ENTRY(__memcpy_z196)
 	.machine "z196"
 	.machinemode "zarch_nohighgprs"
+	lr      %r1,%r2         # r1: Use as dest ; r2: Return dest
+.L_Z196_start:
 	llgfr   %r4,%r4
 	ltgr    %r4,%r4
 	je      .L_Z196_4
 	aghi    %r4,-1
-	lr      %r1,%r2
 	srlg    %r5,%r4,8
 	ltgr    %r5,%r5
 	jne     .L_Z196_5
@@ -60,13 +69,22 @@ ENTRY(__memcpy_z196)
 	mvc     0(1,%r1),0(%r3)
 END(__memcpy_z196)
 
+ENTRY(____mempcpy_z10)
+	.machine "z10"
+	.machinemode "zarch_nohighgprs"
+	lr      %r1,%r2         # Use as dest
+	la      %r2,0(%r4,%r2)  # Return dest + n
+	j	.L_Z10_start
+END(____mempcpy_z10)
+
 ENTRY(__memcpy_z10)
 	.machine "z10"
 	.machinemode "zarch_nohighgprs"
+	lr      %r1,%r2         # r1: Use as dest ; r2: Return dest
+.L_Z10_start:
 	llgfr   %r4,%r4
 	cgije   %r4,0,.L_Z10_4
 	aghi    %r4,-1
-	lr      %r1,%r2
 	srlg    %r5,%r4,8
 	cgijlh  %r5,0,.L_Z10_13
 .L_Z10_3:
@@ -88,14 +106,23 @@ ENTRY(__memcpy_z10)
 	mvc     0(1,%r1),0(%r3)
 END(__memcpy_z10)
 
+# define __mempcpy ____mempcpy_default
 #endif /* SHARED && IS_IN (libc) */
 
+#define memcpy __memcpy_default
 #include "../memcpy.S"
+#undef memcpy
 
 #if defined SHARED && IS_IN (libc)
 .globl   __GI_memcpy
 .set     __GI_memcpy,__memcpy_default
+.globl   __GI_mempcpy
+.set     __GI_mempcpy,____mempcpy_default
+.globl   __GI___mempcpy
+.set     __GI___mempcpy,____mempcpy_default
 #else
 .globl   memcpy
 .set     memcpy,__memcpy_default
+.weak    mempcpy
+.set     mempcpy,__mempcpy
 #endif
Index: glibc-2.22/sysdeps/s390/s390-64/memcpy.S
===================================================================
--- glibc-2.22.orig/sysdeps/s390/s390-64/memcpy.S
+++ glibc-2.22/sysdeps/s390/s390-64/memcpy.S
@@ -27,19 +27,27 @@
 
 
        .text
+ENTRY(__mempcpy)
+	.machine "z900"
+	lgr     %r1,%r2             # Use as dest
+	la      %r2,0(%r4,%r2)      # Return dest + n
+	j	.L_Z900_start
+END(__mempcpy)
+#ifndef USE_MULTIARCH
+libc_hidden_def (__mempcpy)
+weak_alias (__mempcpy, mempcpy)
+libc_hidden_builtin_def (mempcpy)
+#endif
 
-#ifdef USE_MULTIARCH
-ENTRY(__memcpy_default)
-#else
 ENTRY(memcpy)
-#endif
 	.machine "z900"
+	lgr     %r1,%r2             # r1: Use as dest ; r2: Return dest
+.L_Z900_start:
 	ltgr    %r4,%r4
 	je      .L_Z900_4
 	aghi    %r4,-1
 	srlg    %r5,%r4,8
 	ltgr    %r5,%r5
-	lgr     %r1,%r2
 	jne     .L_Z900_13
 .L_Z900_3:
 	larl    %r5,.L_Z900_15
@@ -57,25 +65,24 @@ ENTRY(memcpy)
 	j       .L_Z900_3
 .L_Z900_15:
 	mvc     0(1,%r1),0(%r3)
-
-#ifdef USE_MULTIARCH
-END(__memcpy_default)
-#else
 END(memcpy)
+#ifndef USE_MULTIARCH
 libc_hidden_builtin_def (memcpy)
 #endif
 
 ENTRY(__memcpy_mvcle)
-       # Using as standalone function will result in unexpected
-       # results since the length field is incremented by 1 in order to
-       # compensate the changes already done in the functions above.
-       aghi    %r4,1               # length + 1
-       lgr     %r5,%r4             # source length
-       lgr     %r4,%r3             # source address
-       lgr     %r3,%r5             # destination length = source length
+	# Using as standalone function will result in unexpected
+	# results since the length field is incremented by 1 in order to
+	# compensate the changes already done in the functions above.
+	lgr     %r0,%r2             # backup return dest [ + n ]
+	aghi    %r4,1               # length + 1
+	lgr     %r5,%r4             # source length
+	lgr     %r4,%r3             # source address
+	lgr     %r2,%r1             # destination address
+	lgr     %r3,%r5             # destination length = source length
 .L_MVCLE_1:
-       mvcle   %r2,%r4,0           # thats it, MVCLE is your friend
-       jo      .L_MVCLE_1
-       lgr     %r2,%r1             # return destination address
-       br      %r14
+	mvcle   %r2,%r4,0           # thats it, MVCLE is your friend
+	jo      .L_MVCLE_1
+	lgr     %r2,%r0             # return destination address
+	br      %r14
 END(__memcpy_mvcle)
Index: glibc-2.22/sysdeps/s390/s390-64/multiarch/memcpy-s390x.S
===================================================================
--- glibc-2.22.orig/sysdeps/s390/s390-64/multiarch/memcpy-s390x.S
+++ glibc-2.22/sysdeps/s390/s390-64/multiarch/memcpy-s390x.S
@@ -29,12 +29,20 @@
 
 #if defined SHARED && IS_IN (libc)
 
+ENTRY(____mempcpy_z196)
+	.machine "z196"
+	lgr     %r1,%r2         # Use as dest
+	la      %r2,0(%r4,%r2)  # Return dest + n
+	j	.L_Z196_start
+END(____mempcpy_z196)
+
 ENTRY(__memcpy_z196)
 	.machine "z196"
+	lgr     %r1,%r2         # r1: Use as dest ; r2: Return dest
+.L_Z196_start:
 	ltgr    %r4,%r4
 	je      .L_Z196_4
 	aghi    %r4,-1
-	lgr     %r1,%r2
 	srlg    %r5,%r4,8
 	ltgr    %r5,%r5
 	jne     .L_Z196_5
@@ -58,11 +66,19 @@ ENTRY(__memcpy_z196)
 	mvc     0(1,%r1),0(%r3)
 END(__memcpy_z196)
 
+ENTRY(____mempcpy_z10)
+	.machine "z10"
+	lgr     %r1,%r2         # Use as dest
+	la      %r2,0(%r4,%r2)  # Return dest + n
+	j	.L_Z10_start
+END(____mempcpy_z10)
+
 ENTRY(__memcpy_z10)
 	.machine "z10"
+	lgr     %r1,%r2         # r1: Use as dest ; r2: Return dest
+.L_Z10_start:
 	cgije   %r4,0,.L_Z10_4
 	aghi    %r4,-1
-	lgr     %r1,%r2
 	srlg    %r5,%r4,8
 	cgijlh  %r5,0,.L_Z10_13
 .L_Z10_3:
@@ -84,14 +100,23 @@ ENTRY(__memcpy_z10)
 	mvc     0(1,%r1),0(%r3)
 END(__memcpy_z10)
 
+# define __mempcpy ____mempcpy_default
 #endif /* SHARED && IS_IN (libc) */
 
+#define memcpy __memcpy_default
 #include "../memcpy.S"
+#undef memcpy
 
 #if defined SHARED && IS_IN (libc)
 .globl   __GI_memcpy
 .set     __GI_memcpy,__memcpy_default
+.globl   __GI_mempcpy
+.set     __GI_mempcpy,____mempcpy_default
+.globl   __GI___mempcpy
+.set     __GI___mempcpy,____mempcpy_default
 #else
 .globl   memcpy
 .set     memcpy,__memcpy_default
+.weak    mempcpy
+.set     mempcpy,__mempcpy
 #endif

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File 0034-S390-Implement-mempcpy-with-help-of-memcpy.-BZ-19765.patch of Package glibc-utils (Revision cbf66bfdedd692a006606b565b77257a)

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