File 0051-S390-Add-arch13-memmove-ifunc-variant.patch of Package glibc-utils

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File 0051-S390-Add-arch13-memmove-ifunc-variant.patch of Package glibc-utils (Revision d09f62c7b7f4a5c4096578b4bd424908)

Currently displaying revision d09f62c7b7f4a5c4096578b4bd424908 , Show latest

2019-03-22  Stefan Liebler  <stli@linux.ibm.com>

* sysdeps/s390/ifunc-memcpy.h (HAVE_MEMMOVE_ARCH13, MEMMOVE_ARCH13
	HAVE_MEMMOVE_IFUNC_AND_ARCH13_SUPPORT): New defines.
	* sysdeps/s390/memcpy-z900.S: Add arch13 memmove implementation.
	* sysdeps/s390/memmove.c (memmove): Add arch13 variant in
	ifunc selector.
	* sysdeps/s390/multiarch/ifunc-impl-list.c
	(__libc_ifunc_impl_list): Add ifunc variant for arch13 memmove.
	* sysdeps/s390/multiarch/ifunc-resolve.h (S390_STFLE_BITS_ARCH13_MIE3,
	S390_IS_ARCH13_MIE3): New defines.

Index: glibc-2.22/sysdeps/s390/ifunc-memcpy.h
===================================================================
--- glibc-2.22.orig/sysdeps/s390/ifunc-memcpy.h
+++ glibc-2.22/sysdeps/s390/ifunc-memcpy.h
@@ -44,7 +44,7 @@
 #endif
 
 #if defined SHARED && defined USE_MULTIARCH && IS_IN (libc)	\
-  && ! defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
+  && ! defined HAVE_S390_MIN_ARCH13_ZARCH_ASM_SUPPORT
 # define HAVE_MEMMOVE_IFUNC	1
 #else
 # define HAVE_MEMMOVE_IFUNC	0
@@ -56,14 +56,27 @@
 # define HAVE_MEMMOVE_IFUNC_AND_VX_SUPPORT 0
 #endif
 
-#if defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
+#ifdef HAVE_S390_ARCH13_ASM_SUPPORT
+# define HAVE_MEMMOVE_IFUNC_AND_ARCH13_SUPPORT HAVE_MEMMOVE_IFUNC
+#else
+# define HAVE_MEMMOVE_IFUNC_AND_ARCH13_SUPPORT 0
+#endif
+
+#if defined HAVE_S390_MIN_ARCH13_ZARCH_ASM_SUPPORT
+# define MEMMOVE_DEFAULT	MEMMOVE_ARCH13
+# define HAVE_MEMMOVE_C		0
+# define HAVE_MEMMOVE_Z13	0
+# define HAVE_MEMMOVE_ARCH13	1
+#elif defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
 # define MEMMOVE_DEFAULT	MEMMOVE_Z13
 # define HAVE_MEMMOVE_C		0
 # define HAVE_MEMMOVE_Z13	1
+# define HAVE_MEMMOVE_ARCH13	HAVE_MEMMOVE_IFUNC_AND_ARCH13_SUPPORT
 #else
 # define MEMMOVE_DEFAULT	MEMMOVE_C
 # define HAVE_MEMMOVE_C		1
 # define HAVE_MEMMOVE_Z13	HAVE_MEMMOVE_IFUNC_AND_VX_SUPPORT
+# define HAVE_MEMMOVE_ARCH13	HAVE_MEMMOVE_IFUNC_AND_ARCH13_SUPPORT
 #endif
 
 #if HAVE_MEMCPY_Z900_G5
@@ -101,3 +114,9 @@
 #else
 # define MEMMOVE_Z13		NULL
 #endif
+
+#if HAVE_MEMMOVE_ARCH13
+# define MEMMOVE_ARCH13		__memmove_arch13
+#else
+# define MEMMOVE_ARCH13		NULL
+#endif
Index: glibc-2.22/sysdeps/s390/memcpy-z900.S
===================================================================
--- glibc-2.22.orig/sysdeps/s390/memcpy-z900.S
+++ glibc-2.22/sysdeps/s390/memcpy-z900.S
@@ -277,6 +277,61 @@ ENTRY(MEMMOVE_Z13)
 END(MEMMOVE_Z13)
 #endif /* HAVE_MEMMOVE_Z13  */
 
+#if HAVE_MEMMOVE_ARCH13
+ENTRY(MEMMOVE_ARCH13)
+	.machine "arch13"
+	.machinemode "zarch_nohighgprs"
+# if ! defined __s390x__
+	/* Note: The 31bit dst and src pointers are prefixed with zeroes.  */
+	llgfr	%r4,%r4
+	llgfr	%r3,%r3
+	llgfr	%r2,%r2
+# endif /* ! defined __s390x__ */
+	sgrk	%r5,%r2,%r3
+	aghik	%r0,%r4,-1	/* Both vstl and mvcrl needs highest index.  */
+	clgijh	%r4,16,.L_MEMMOVE_ARCH13_LARGE
+.L_MEMMOVE_ARCH13_SMALL:
+	jl .L_MEMMOVE_ARCH13_END /* Return if len was zero (cc of aghik).  */
+	/* Store up to 16 bytes with vll/vstl (needs highest index).  */
+	vll	%v16,%r0,0(%r3)
+	vstl	%v16,%r0,0(%r2)
+.L_MEMMOVE_ARCH13_END:
+	br      %r14
+.L_MEMMOVE_ARCH13_LARGE:
+	lgr     %r1,%r2	/* For memcpy: r1: Use as dest ; r2: Return dest  */
+	/* The unsigned comparison (dst - src >= len) determines if we can
+	   execute the forward case with memcpy.  */
+#if ! HAVE_MEMCPY_Z196
+# error The arch13 variant of memmove needs the z196 variant of memcpy!
+#endif
+	/* Backward case.  */
+	clgrjhe %r5,%r4,.L_Z196_start2
+	clgijh	%r0,255,.L_MEMMOVE_ARCH13_LARGER_256B
+	/* Move up to 256bytes with mvcrl (move right to left).  */
+	mvcrl	0(%r1),0(%r3)	/* Move (r0 + 1) bytes from r3 to r1.  */
+	br      %r14
+.L_MEMMOVE_ARCH13_LARGER_256B:
+	/* First move the "remaining" block of up to 256 bytes at the end of
+	   src/dst buffers.  Then move blocks of 256bytes in a loop starting
+	   with the block at the end.
+	   (If src/dst pointers are aligned e.g. to 256 bytes, then the pointers
+	   passed to mvcrl instructions are aligned, too)  */
+	risbgn	%r5,%r0,8,128+63,56	/* r5 = r0 / 256  */
+	risbgn	%r0,%r0,56,128+63,0	/* r0 = r0 & 0xFF  */
+	slgr	%r4,%r0
+	lay	%r1,-1(%r4,%r1)
+	lay	%r3,-1(%r4,%r3)
+	mvcrl	0(%r1),0(%r3)	/* Move (r0 + 1) bytes from r3 to r1.  */
+	lghi	%r0,255		/* Always copy 256 bytes in the loop below!  */
+.L_MEMMOVE_ARCH13_LARGE_256B_LOOP:
+	aghi	%r1,-256
+	aghi	%r3,-256
+	mvcrl	0(%r1),0(%r3)	/* Move (r0 + 1) bytes from r3 to r1.  */
+	brctg	%r5,.L_MEMMOVE_ARCH13_LARGE_256B_LOOP
+	br      %r14
+END(MEMMOVE_ARCH13)
+#endif /* HAVE_MEMMOVE_ARCH13  */
+
 #if ! HAVE_MEMCPY_IFUNC
 /* If we don't use ifunc, define an alias for mem[p]cpy here.
    Otherwise see sysdeps/s390/mem[p]cpy.c.  */
Index: glibc-2.22/sysdeps/s390/memmove.c
===================================================================
--- glibc-2.22.orig/sysdeps/s390/memmove.c
+++ glibc-2.22/sysdeps/s390/memmove.c
@@ -36,9 +36,19 @@ extern __typeof (__redirect_memmove) MEM
 extern __typeof (__redirect_memmove) MEMMOVE_Z13 attribute_hidden;
 # endif
 
+# if HAVE_MEMMOVE_ARCH13
+extern __typeof (__redirect_memmove) MEMMOVE_ARCH13 attribute_hidden;
+# endif
+
 s390_libc_ifunc_expr (__redirect_memmove, memmove,
-		      (HAVE_MEMMOVE_Z13 && (hwcap & HWCAP_S390_VX))
-		      ? MEMMOVE_Z13
-		      : MEMMOVE_DEFAULT
+		      ({
+			s390_libc_ifunc_expr_stfle_init ();
+			(HAVE_MEMMOVE_ARCH13
+			 && S390_IS_ARCH13_MIE3 (stfle_bits))
+			  ? MEMMOVE_ARCH13
+			  : (HAVE_MEMMOVE_Z13 && (hwcap & HWCAP_S390_VX))
+			  ? MEMMOVE_Z13
+			  : MEMMOVE_DEFAULT;
+		      })
 		      )
 #endif
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
@@ -95,6 +95,11 @@ __libc_ifunc_impl_list (const char *name
 
 #if HAVE_MEMMOVE_IFUNC
     IFUNC_IMPL (i, name, memmove,
+# if HAVE_MEMMOVE_ARCH13
+		IFUNC_IMPL_ADD (array, i, memmove,
+				S390_IS_ARCH13_MIE3 (stfle_bits),
+				MEMMOVE_ARCH13)
+# endif
 # if HAVE_MEMMOVE_Z13
 		IFUNC_IMPL_ADD (array, i, memmove,
 				dl_hwcap & HWCAP_S390_VX, MEMMOVE_Z13)
Index: glibc-2.22/sysdeps/s390/multiarch/ifunc-resolve.h
===================================================================
--- glibc-2.22.orig/sysdeps/s390/multiarch/ifunc-resolve.h
+++ glibc-2.22/sysdeps/s390/multiarch/ifunc-resolve.h
@@ -22,6 +22,11 @@
 
 #define S390_STFLE_BITS_Z10  34 /* General instructions extension */
 #define S390_STFLE_BITS_Z196 45 /* Distinct operands, pop ... */
+#define S390_STFLE_BITS_ARCH13_MIE3 61 /* Miscellaneous-Instruction-Extensions
+					  Facility 3, e.g. mvcrl.  */
+
+#define S390_IS_ARCH13_MIE3(STFLE_BITS)			\
+  ((STFLE_BITS & (1ULL << (63 - S390_STFLE_BITS_ARCH13_MIE3))) != 0)
 
 #define S390_IS_Z196(STFLE_BITS)			\
   ((STFLE_BITS & (1ULL << (63 - S390_STFLE_BITS_Z196))) != 0)

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File 0051-S390-Add-arch13-memmove-ifunc-variant.patch of Package glibc-utils (Revision d09f62c7b7f4a5c4096578b4bd424908)

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