File 0014-powerpc64le-Fix-ifunc-selection-for-memset... of Package glibc

Overview Repositories Revisions Requests Users Attributes Meta

File 0014-powerpc64le-Fix-ifunc-selection-for-memset-memmove-b.patch of Package glibc (Revision 51d335768b740addd1cc845a3d2cc43b)

Currently displaying revision 51d335768b740addd1cc845a3d2cc43b , Show latest

From 17a73a6d8b4c46f3e87fc53c7c25fa7cec01d707 Mon Sep 17 00:00:00 2001
From: Raoni Fassina Firmino <raoni@linux.ibm.com>
Date: Mon, 3 May 2021 16:59:35 -0300
Subject: [PATCH] powerpc64le: Fix ifunc selection for memset, memmove, bzero
 and bcopy

The hwcap2 check for the aforementioned functions should check for
both PPC_FEATURE2_ARCH_3_1 and PPC_FEATURE2_HAS_ISEL but was
mistakenly checking for any one of them, enabling isa 3.1 version of
the functions in incompatible processors, like POWER8.

Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
---
 sysdeps/powerpc/powerpc64/multiarch/bcopy.c   |  8 ++++----
 sysdeps/powerpc/powerpc64/multiarch/bzero.c   |  3 ++-
 .../powerpc64/multiarch/ifunc-impl-list.c     | 20 +++++++++----------
 sysdeps/powerpc/powerpc64/multiarch/memmove.c |  8 ++++----
 sysdeps/powerpc/powerpc64/multiarch/memset.c  |  3 ++-
 5 files changed, 22 insertions(+), 20 deletions(-)

diff --git a/sysdeps/powerpc/powerpc64/multiarch/bcopy.c b/sysdeps/powerpc/powerpc64/multiarch/bcopy.c
index 2840b17fdf..02eb1e6a9f 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/bcopy.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/bcopy.c
@@ -28,10 +28,10 @@ extern __typeof (bcopy) __bcopy_power10 attribute_hidden;
 
 libc_ifunc (bcopy,
 #ifdef __LITTLE_ENDIAN__
-	     hwcap2 & (PPC_FEATURE2_ARCH_3_1 |
-		       PPC_FEATURE2_HAS_ISEL)
-	     && (hwcap & PPC_FEATURE_HAS_VSX)
-	     ? __bcopy_power10 :
+	    (hwcap2 & PPC_FEATURE2_ARCH_3_1
+	     && hwcap2 & PPC_FEATURE2_HAS_ISEL
+	     && hwcap & PPC_FEATURE_HAS_VSX)
+	    ? __bcopy_power10 :
 #endif
             (hwcap & PPC_FEATURE_HAS_VSX)
             ? __bcopy_power7
diff --git a/sysdeps/powerpc/powerpc64/multiarch/bzero.c b/sysdeps/powerpc/powerpc64/multiarch/bzero.c
index 50a5320c66..660d7dc686 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/bzero.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/bzero.c
@@ -33,7 +33,8 @@ extern __typeof (bzero) __bzero_power10 attribute_hidden;
 
 libc_ifunc (__bzero,
 # ifdef __LITTLE_ENDIAN__
-	    (hwcap2 & (PPC_FEATURE2_ARCH_3_1 | PPC_FEATURE2_HAS_ISEL)
+	    (hwcap2 & PPC_FEATURE2_ARCH_3_1
+	     && hwcap2 & PPC_FEATURE2_HAS_ISEL
 	     && hwcap & PPC_FEATURE_HAS_VSX)
 	    ? __bzero_power10 :
 # endif
diff --git a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
index 49d9a33e65..b123c6a3d3 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
@@ -75,9 +75,9 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
   IFUNC_IMPL (i, name, memmove,
 #ifdef __LITTLE_ENDIAN__
 	      IFUNC_IMPL_ADD (array, i, memmove,
-			      hwcap2 & (PPC_FEATURE2_ARCH_3_1 |
-					PPC_FEATURE2_HAS_ISEL)
-			      && (hwcap & PPC_FEATURE_HAS_VSX),
+			      hwcap2 & PPC_FEATURE2_ARCH_3_1
+			      && hwcap2 & PPC_FEATURE2_HAS_ISEL
+			      && hwcap & PPC_FEATURE_HAS_VSX,
 			      __memmove_power10)
 #endif
 	      IFUNC_IMPL_ADD (array, i, memmove, hwcap & PPC_FEATURE_HAS_VSX,
@@ -88,8 +88,8 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
   IFUNC_IMPL (i, name, memset,
 #ifdef __LITTLE_ENDIAN__
 	      IFUNC_IMPL_ADD (array, i, memset,
-			      hwcap2 & (PPC_FEATURE2_ARCH_3_1 |
-					PPC_FEATURE2_HAS_ISEL)
+			      hwcap2 & PPC_FEATURE2_ARCH_3_1
+			      && hwcap2 & PPC_FEATURE2_HAS_ISEL
 			      && hwcap & PPC_FEATURE_HAS_VSX,
 			      __memset_power10)
 #endif
@@ -196,8 +196,8 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
   IFUNC_IMPL (i, name, bzero,
 #ifdef __LITTLE_ENDIAN__
 	      IFUNC_IMPL_ADD (array, i, bzero,
-			      hwcap2 & (PPC_FEATURE2_ARCH_3_1 |
-					PPC_FEATURE2_HAS_ISEL)
+			      hwcap2 & PPC_FEATURE2_ARCH_3_1
+			      && hwcap2 & PPC_FEATURE2_HAS_ISEL
 			      && hwcap & PPC_FEATURE_HAS_VSX,
 			      __bzero_power10)
 #endif
@@ -215,9 +215,9 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
   IFUNC_IMPL (i, name, bcopy,
 #ifdef __LITTLE_ENDIAN__
 	      IFUNC_IMPL_ADD (array, i, bcopy,
-			      hwcap2 & (PPC_FEATURE2_ARCH_3_1 |
-					PPC_FEATURE2_HAS_ISEL)
-			      && (hwcap & PPC_FEATURE_HAS_VSX),
+			      hwcap2 & PPC_FEATURE2_ARCH_3_1
+			      && hwcap2 & PPC_FEATURE2_HAS_ISEL
+			      && hwcap & PPC_FEATURE_HAS_VSX,
 			      __bcopy_power10)
 #endif
 	      IFUNC_IMPL_ADD (array, i, bcopy, hwcap & PPC_FEATURE_HAS_VSX,
diff --git a/sysdeps/powerpc/powerpc64/multiarch/memmove.c b/sysdeps/powerpc/powerpc64/multiarch/memmove.c
index 420c2f279a..637b2cbf7f 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/memmove.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/memmove.c
@@ -36,10 +36,10 @@ extern __typeof (__redirect_memmove) __memmove_power10 attribute_hidden;
 
 libc_ifunc (__libc_memmove,
 #ifdef __LITTLE_ENDIAN__
-	     hwcap2 & (PPC_FEATURE2_ARCH_3_1 |
-		       PPC_FEATURE2_HAS_ISEL)
-	     && (hwcap & PPC_FEATURE_HAS_VSX)
-	     ? __memmove_power10 :
+	    (hwcap2 & PPC_FEATURE2_ARCH_3_1
+	     && hwcap2 & PPC_FEATURE2_HAS_ISEL
+	     && hwcap & PPC_FEATURE_HAS_VSX)
+	    ? __memmove_power10 :
 #endif
 		     (hwcap & PPC_FEATURE_HAS_VSX)
 		     ? __memmove_power7
diff --git a/sysdeps/powerpc/powerpc64/multiarch/memset.c b/sysdeps/powerpc/powerpc64/multiarch/memset.c
index 6562646dff..5994bf02e6 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/memset.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/memset.c
@@ -41,7 +41,8 @@ extern __typeof (__redirect_memset) __memset_power10 attribute_hidden;
    ifunc symbol properly.  */
 libc_ifunc (__libc_memset,
 # ifdef __LITTLE_ENDIAN__
-	    (hwcap2 & (PPC_FEATURE2_ARCH_3_1 | PPC_FEATURE2_HAS_ISEL)
+	    (hwcap2 & PPC_FEATURE2_ARCH_3_1
+	     && hwcap2 & PPC_FEATURE2_HAS_ISEL
 	     && hwcap & PPC_FEATURE_HAS_VSX)
 	    ? __memset_power10 :
 # endif
-- 
2.34.1

Places

File 0014-powerpc64le-Fix-ifunc-selection-for-memset-memmove-b.patch of Package glibc (Revision 51d335768b740addd1cc845a3d2cc43b)

Places