x86: Rename generic functions with unique postfix for clarity

No functions are changed. It just renames generic implementations from
'{func}_sse2' to '{func}_generic'. This is just because the postfix
"_sse2" was overloaded and was used for files that had hand-optimized
sse2 assembly implementations and files that just redirected back
to the generic implementation.

Full xcheck passed on x86_64.

sysdeps/x86_64/multiarch/Makefile

@@ -43,7 +43,7 @@ sysdep_routines += \
   stpcpy-sse2-unaligned \
   stpncpy-avx2 \
   stpncpy-avx2-rtm \
-  stpncpy-c \
+  stpncpy-generic \
   stpncpy-evex \
   stpncpy-sse2-unaligned \
   strcasecmp_l-avx2 \
@@ -76,8 +76,8 @@ sysdep_routines += \
   strcpy-evex \
   strcpy-sse2 \
   strcpy-sse2-unaligned \
-  strcspn-c \
+  strcspn-generic \
-  strcspn-sse2 \
+  strcspn-sse4 \
   strlen-avx2 \
   strlen-avx2-rtm \
   strlen-evex \
@@ -90,7 +90,7 @@ sysdep_routines += \
   strncase_l-sse4_2 \
   strncat-avx2 \
   strncat-avx2-rtm \
-  strncat-c \
+  strncat-generic \
   strncat-evex \
   strncat-sse2-unaligned \
   strncmp-avx2 \
@@ -100,7 +100,7 @@ sysdep_routines += \
   strncmp-sse4_2 \
   strncpy-avx2 \
   strncpy-avx2-rtm \
-  strncpy-c \
+  strncpy-generic \
   strncpy-evex \
   strncpy-sse2-unaligned \
   strnlen-avx2 \
@@ -108,22 +108,23 @@ sysdep_routines += \
   strnlen-evex \
   strnlen-evex512 \
   strnlen-sse2 \
-  strpbrk-c \
+  strpbrk-generic \
-  strpbrk-sse2 \
+  strpbrk-sse4 \
   strrchr-avx2 \
   strrchr-avx2-rtm \
   strrchr-evex \
   strrchr-sse2 \
-  strspn-c \
+  strspn-generic \
-  strspn-sse2 \
+  strspn-sse4 \
   strstr-avx512 \
   strstr-sse2-unaligned \
   varshift \
 # sysdep_routines
-CFLAGS-varshift.c += -msse4
+
-CFLAGS-strcspn-c.c += -msse4
+CFLAGS-strcspn-sse4.c += -msse4
-CFLAGS-strpbrk-c.c += -msse4
+CFLAGS-strpbrk-sse4.c += -msse4
-CFLAGS-strspn-c.c += -msse4
+CFLAGS-strspn-sse4.c += -msse4
+
 CFLAGS-strstr-avx512.c += -mavx512f -mavx512vl -mavx512dq -mavx512bw -mbmi -mbmi2 -O3
 endif
 
@@ -137,7 +138,7 @@ sysdep_routines += \
   wcscmp-avx2-rtm \
   wcscmp-evex \
   wcscmp-sse2 \
-  wcscpy-c \
+  wcscpy-generic \
   wcscpy-ssse3 \
   wcslen-avx2 \
   wcslen-avx2-rtm \
@@ -147,11 +148,11 @@ sysdep_routines += \
   wcslen-sse4_1 \
   wcsncmp-avx2 \
   wcsncmp-avx2-rtm \
+  wcsncmp-generic \
   wcsncmp-evex \
-  wcsncmp-sse2 \
   wcsnlen-avx2 \
   wcsnlen-avx2-rtm \
-  wcsnlen-c \
+  wcsnlen-generic \
   wcsnlen-evex \
   wcsnlen-evex512 \
   wcsnlen-sse4_1 \

sysdeps/x86_64/multiarch/ifunc-avx2.h

@@ -19,7 +19,11 @@
 
 #include <init-arch.h>
 
-extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2) attribute_hidden;
+#ifndef GENERIC
+# define GENERIC sse2
+#endif
+
+extern __typeof (REDIRECT_NAME) OPTIMIZE (GENERIC) attribute_hidden;
 extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2) attribute_hidden;
 extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2_rtm) attribute_hidden;
 extern __typeof (REDIRECT_NAME) OPTIMIZE (evex) attribute_hidden;
@@ -44,5 +48,5 @@ IFUNC_SELECTOR (void)
 	return OPTIMIZE (avx2);
     }
 
-  return OPTIMIZE (sse2);
+  return OPTIMIZE (GENERIC);
 }

sysdeps/x86_64/multiarch/ifunc-impl-list.c

@@ -367,7 +367,7 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 			      __stpncpy_evex)
 	      IFUNC_IMPL_ADD (array, i, stpncpy, 1,
 			      __stpncpy_sse2_unaligned)
-	      IFUNC_IMPL_ADD (array, i, stpncpy, 1, __stpncpy_sse2))
+	      IFUNC_IMPL_ADD (array, i, stpncpy, 1, __stpncpy_generic))
 
   /* Support sysdeps/x86_64/multiarch/stpcpy.c.  */
   IFUNC_IMPL (i, name, stpcpy,
@@ -526,7 +526,7 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
   IFUNC_IMPL (i, name, strcspn,
 	      IFUNC_IMPL_ADD (array, i, strcspn, CPU_FEATURE_USABLE (SSE4_2),
 			      __strcspn_sse42)
-	      IFUNC_IMPL_ADD (array, i, strcspn, 1, __strcspn_sse2))
+	      IFUNC_IMPL_ADD (array, i, strcspn, 1, __strcspn_generic))
 
   /* Support sysdeps/x86_64/multiarch/strncase_l.c.  */
   IFUNC_IMPL (i, name, strncasecmp,
@@ -580,7 +580,7 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 			      __strncat_evex)
 	      IFUNC_IMPL_ADD (array, i, strncat, 1,
 			      __strncat_sse2_unaligned)
-	      IFUNC_IMPL_ADD (array, i, strncat, 1, __strncat_sse2))
+	      IFUNC_IMPL_ADD (array, i, strncat, 1, __strncat_generic))
 
   /* Support sysdeps/x86_64/multiarch/strncpy.c.  */
   IFUNC_IMPL (i, name, strncpy,
@@ -596,20 +596,20 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 			      __strncpy_evex)
 	      IFUNC_IMPL_ADD (array, i, strncpy, 1,
 			      __strncpy_sse2_unaligned)
-	      IFUNC_IMPL_ADD (array, i, strncpy, 1, __strncpy_sse2))
+	      IFUNC_IMPL_ADD (array, i, strncpy, 1, __strncpy_generic))
 
   /* Support sysdeps/x86_64/multiarch/strpbrk.c.  */
   IFUNC_IMPL (i, name, strpbrk,
 	      IFUNC_IMPL_ADD (array, i, strpbrk, CPU_FEATURE_USABLE (SSE4_2),
 			      __strpbrk_sse42)
-	      IFUNC_IMPL_ADD (array, i, strpbrk, 1, __strpbrk_sse2))
+	      IFUNC_IMPL_ADD (array, i, strpbrk, 1, __strpbrk_generic))
 
 
   /* Support sysdeps/x86_64/multiarch/strspn.c.  */
   IFUNC_IMPL (i, name, strspn,
 	      IFUNC_IMPL_ADD (array, i, strspn, CPU_FEATURE_USABLE (SSE4_2),
 			      __strspn_sse42)
-	      IFUNC_IMPL_ADD (array, i, strspn, 1, __strspn_sse2))
+	      IFUNC_IMPL_ADD (array, i, strspn, 1, __strspn_generic))
 
   /* Support sysdeps/x86_64/multiarch/strstr.c.  */
   IFUNC_IMPL (i, name, strstr,
@@ -686,13 +686,13 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 			       && CPU_FEATURE_USABLE (AVX512BW)
 			       && CPU_FEATURE_USABLE (BMI2)),
 			      __wcsncmp_evex)
-	      IFUNC_IMPL_ADD (array, i, wcsncmp, 1, __wcsncmp_sse2))
+	      IFUNC_IMPL_ADD (array, i, wcsncmp, 1, __wcsncmp_generic))
 
   /* Support sysdeps/x86_64/multiarch/wcscpy.c.  */
   IFUNC_IMPL (i, name, wcscpy,
 	      IFUNC_IMPL_ADD (array, i, wcscpy, CPU_FEATURE_USABLE (SSSE3),
 			      __wcscpy_ssse3)
-	      IFUNC_IMPL_ADD (array, i, wcscpy, 1, __wcscpy_sse2))
+	      IFUNC_IMPL_ADD (array, i, wcscpy, 1, __wcscpy_generic))
 
   /* Support sysdeps/x86_64/multiarch/wcslen.c.  */
   IFUNC_IMPL (i, name, wcslen,
@@ -744,7 +744,7 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 	      IFUNC_IMPL_ADD (array, i, wcsnlen,
 			      CPU_FEATURE_USABLE (SSE4_1),
 			      __wcsnlen_sse4_1)
-	      IFUNC_IMPL_ADD (array, i, wcsnlen, 1, __wcsnlen_sse2))
+	      IFUNC_IMPL_ADD (array, i, wcsnlen, 1, __wcsnlen_generic))
 
   /* Support sysdeps/x86_64/multiarch/wmemchr.c.  */
   IFUNC_IMPL (i, name, wmemchr,

sysdeps/x86_64/multiarch/ifunc-sse4_2.h

@@ -19,7 +19,7 @@
 
 #include <init-arch.h>
 
-extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2) attribute_hidden;
+extern __typeof (REDIRECT_NAME) OPTIMIZE (generic) attribute_hidden;
 extern __typeof (REDIRECT_NAME) OPTIMIZE (sse42) attribute_hidden;
 
 static inline void *
@@ -30,5 +30,5 @@ IFUNC_SELECTOR (void)
   if (CPU_FEATURE_USABLE_P (cpu_features, SSE4_2))
     return OPTIMIZE (sse42);
 
-  return OPTIMIZE (sse2);
+  return OPTIMIZE (generic);
 }

sysdeps/x86_64/multiarch/ifunc-strcpy.h

@@ -20,7 +20,11 @@
 
 #include <init-arch.h>
 
-extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2) attribute_hidden;
+#ifndef GENERIC
+# define GENERIC sse2
+#endif
+
+extern __typeof (REDIRECT_NAME) OPTIMIZE (GENERIC) attribute_hidden;
 extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2_unaligned)
   attribute_hidden;
 extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2) attribute_hidden;
@@ -49,5 +53,5 @@ IFUNC_SELECTOR (void)
   if (CPU_FEATURES_ARCH_P (cpu_features, Fast_Unaligned_Load))
     return OPTIMIZE (sse2_unaligned);
 
-  return OPTIMIZE (sse2);
+  return OPTIMIZE (GENERIC);
 }

sysdeps/x86_64/multiarch/ifunc-wcslen.h

@@ -19,7 +19,11 @@
 
 #include <init-arch.h>
 
-extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2) attribute_hidden;
+#ifndef GENERIC
+# define GENERIC sse2
+#endif
+
+extern __typeof (REDIRECT_NAME) OPTIMIZE (GENERIC) attribute_hidden;
 extern __typeof (REDIRECT_NAME) OPTIMIZE (sse4_1) attribute_hidden;
 extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2) attribute_hidden;
 extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2_rtm) attribute_hidden;
@@ -48,5 +52,5 @@ IFUNC_SELECTOR (void)
   if (CPU_FEATURE_USABLE_P (cpu_features, SSE4_1))
     return OPTIMIZE (sse4_1);
 
-  return OPTIMIZE (sse2);
+  return OPTIMIZE (GENERIC);
 }

sysdeps/x86_64/multiarch/stpncpy-c.c

@@ -1,7 +0,0 @@
-#define STPNCPY __stpncpy_sse2
-#undef weak_alias
-#define weak_alias(ignored1, ignored2)
-#undef libc_hidden_def
-#define libc_hidden_def(stpncpy)
-
-#include <string/stpncpy.c>

sysdeps/x86_64/multiarch/stpncpy-generic.c

@@ -0,0 +1,26 @@
+/* stpncpy.
+   Copyright (C) 2022 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
+   <https://www.gnu.org/licenses/>.  */
+
+
+#define STPNCPY __stpncpy_generic
+#undef weak_alias
+#define weak_alias(ignored1, ignored2)
+#undef libc_hidden_def
+#define libc_hidden_def(stpncpy)
+
+#include <string/stpncpy.c>

sysdeps/x86_64/multiarch/stpncpy.c

@@ -25,6 +25,7 @@
 # undef stpncpy
 # undef __stpncpy
 
+# define GENERIC generic
 # define SYMBOL_NAME stpncpy
 # include "ifunc-strcpy.h"
 

sysdeps/x86_64/multiarch/strcspn-generic.c

@@ -19,7 +19,7 @@
 #if IS_IN (libc)
 
 # include <sysdep.h>
-# define STRCSPN __strcspn_sse2
+# define STRCSPN __strcspn_generic
 
 # undef libc_hidden_builtin_def
 # define libc_hidden_builtin_def(STRCSPN)

sysdeps/x86_64/multiarch/strcspn-sse4.c

@@ -52,8 +52,8 @@
    when either CFlag or ZFlag is 1.  If CFlag == 1, ECX has the offset
    X for case 1.  */
 
-#ifndef STRCSPN_SSE2
+#ifndef STRCSPN_GENERIC
-# define STRCSPN_SSE2 __strcspn_sse2
+# define STRCSPN_GENERIC __strcspn_generic
 # define STRCSPN_SSE42 __strcspn_sse42
 #endif
 
@@ -69,7 +69,7 @@ char *
 #else
 size_t
 #endif
-STRCSPN_SSE2 (const char *, const char *) attribute_hidden;
+STRCSPN_GENERIC (const char *, const char *) attribute_hidden;
 
 
 #ifdef USE_AS_STRPBRK
@@ -119,7 +119,7 @@ STRCSPN_SSE42 (const char *s, const char *a)
       /* There is no NULL terminator.  Don't use SSE4.2 if the length
          of A > 16.  */
       if (a[16] != 0)
-        return STRCSPN_SSE2 (s, a);
+        return STRCSPN_GENERIC (s, a);
     }
 
   aligned = s;

sysdeps/x86_64/multiarch/strncat-c.c

@@ -1,2 +0,0 @@
-#define STRNCAT __strncat_sse2
-#include <string/strncat.c>

sysdeps/x86_64/multiarch/strncat-generic.c

@@ -0,0 +1,21 @@
+/* strncat.
+   Copyright (C) 2022 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
+   <https://www.gnu.org/licenses/>.  */
+
+
+#define STRNCAT __strncat_generic
+#include <string/strncat.c>

sysdeps/x86_64/multiarch/strncat.c

@@ -24,6 +24,7 @@
 # undef strncat
 
 # define SYMBOL_NAME strncat
+# define GENERIC generic
 # include "ifunc-strcpy.h"
 
 libc_ifunc_redirected (__redirect_strncat, strncat, IFUNC_SELECTOR ());

sysdeps/x86_64/multiarch/strncpy-c.c

@@ -1,5 +0,0 @@
-#define STRNCPY __strncpy_sse2
-#undef libc_hidden_builtin_def
-#define libc_hidden_builtin_def(strncpy)
-
-#include <string/strncpy.c>

sysdeps/x86_64/multiarch/strncpy-generic.c

@@ -0,0 +1,24 @@
+/* strncpy.
+   Copyright (C) 2022 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
+   <https://www.gnu.org/licenses/>.  */
+
+
+#define STRNCPY __strncpy_generic
+#undef libc_hidden_builtin_def
+#define libc_hidden_builtin_def(strncpy)
+
+#include <string/strncpy.c>

sysdeps/x86_64/multiarch/strncpy.c

@@ -24,6 +24,7 @@
 # undef strncpy
 
 # define SYMBOL_NAME strncpy
+# define GENERIC generic
 # include "ifunc-strcpy.h"
 
 libc_ifunc_redirected (__redirect_strncpy, strncpy, IFUNC_SELECTOR ());

sysdeps/x86_64/multiarch/strpbrk-generic.c

@@ -19,7 +19,7 @@
 #if IS_IN (libc)
 
 # include <sysdep.h>
-# define STRPBRK __strpbrk_sse2
+# define STRPBRK __strpbrk_generic
 
 # undef libc_hidden_builtin_def
 # define libc_hidden_builtin_def(STRPBRK)

sysdeps/x86_64/multiarch/strpbrk-sse4.c

@@ -17,6 +17,6 @@
    <https://www.gnu.org/licenses/>.  */
 
 #define USE_AS_STRPBRK
-#define STRCSPN_SSE2 __strpbrk_sse2
+#define STRCSPN_GENERIC __strpbrk_generic
 #define STRCSPN_SSE42 __strpbrk_sse42
-#include "strcspn-c.c"
+#include "strcspn-sse4.c"

sysdeps/x86_64/multiarch/strspn-generic.c

@@ -19,7 +19,7 @@
 #if IS_IN (libc)
 
 # include <sysdep.h>
-# define STRSPN __strspn_sse2
+# define STRSPN __strspn_generic
 
 # undef libc_hidden_builtin_def
 # define libc_hidden_builtin_def(STRSPN)

sysdeps/x86_64/multiarch/strspn-sse4.c

@@ -51,7 +51,7 @@
 
    We exit from the loop for case 1.  */
 
-extern size_t __strspn_sse2 (const char *, const char *) attribute_hidden;
+extern size_t __strspn_generic (const char *, const char *) attribute_hidden;
 
 
 size_t
@@ -98,7 +98,7 @@ __strspn_sse42 (const char *s, const char *a)
       /* There is no NULL terminator.  Don't use SSE4.2 if the length
          of A > 16.  */
       if (a[16] != 0)
-        return __strspn_sse2 (s, a);
+        return __strspn_generic (s, a);
     }
   aligned = s;
   offset = (unsigned int) ((size_t) s & 15);

sysdeps/x86_64/multiarch/wcscpy-c.c

@@ -1,5 +0,0 @@
-#if IS_IN (libc)
-# define WCSCPY  __wcscpy_sse2
-#endif
-
-#include <wcsmbs/wcscpy.c>

sysdeps/x86_64/multiarch/wcscpy-generic.c

@@ -0,0 +1,24 @@
+/* wcscpy.
+   Copyright (C) 2022 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
+   <https://www.gnu.org/licenses/>.  */
+
+
+#if IS_IN (libc)
+# define WCSCPY  __wcscpy_generic
+#endif
+
+#include <wcsmbs/wcscpy.c>

sysdeps/x86_64/multiarch/wcscpy.c

@@ -26,7 +26,7 @@
 # define SYMBOL_NAME wcscpy
 # include <init-arch.h>
 
-extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2) attribute_hidden;
+extern __typeof (REDIRECT_NAME) OPTIMIZE (generic) attribute_hidden;
 extern __typeof (REDIRECT_NAME) OPTIMIZE (ssse3) attribute_hidden;
 
 static inline void *
@@ -37,7 +37,7 @@ IFUNC_SELECTOR (void)
   if (CPU_FEATURE_USABLE_P (cpu_features, SSSE3))
     return OPTIMIZE (ssse3);
 
-  return OPTIMIZE (sse2);
+  return OPTIMIZE (generic);
 }
 
 libc_ifunc_redirected (__redirect_wcscpy, __wcscpy, IFUNC_SELECTOR ());

sysdeps/x86_64/multiarch/wcsncmp-generic.c

@@ -1,4 +1,4 @@
-/* wcsncmp optimized with SSE2.
+/* wcsncmp.
    Copyright (C) 2018-2022 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
@@ -16,5 +16,5 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
-#define WCSNCMP __wcsncmp_sse2
+#define WCSNCMP __wcsncmp_generic
 #include <wcsmbs/wcsncmp.c>

sysdeps/x86_64/multiarch/wcsncmp.c

@@ -24,6 +24,8 @@
 # undef wcsncmp
 # undef __wcsncmp
 
+# define GENERIC generic
+
 # define SYMBOL_NAME wcsncmp
 # include "ifunc-avx2.h"
 

sysdeps/x86_64/multiarch/wcsnlen-c.c

@@ -1,9 +0,0 @@
-#if IS_IN (libc)
-# include <wchar.h>
-
-# define WCSNLEN __wcsnlen_sse2
-
-extern __typeof (wcsnlen) __wcsnlen_sse2;
-#endif
-
-#include "wcsmbs/wcsnlen.c"

sysdeps/x86_64/multiarch/wcsnlen-generic.c

@@ -0,0 +1,28 @@
+/* wcsnlen.
+   Copyright (C) 2022 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
+   <https://www.gnu.org/licenses/>.  */
+
+
+#if IS_IN (libc)
+# include <wchar.h>
+
+# define WCSNLEN __wcsnlen_generic
+
+extern __typeof (wcsnlen) __wcsnlen_generic;
+#endif
+
+#include "wcsmbs/wcsnlen.c"

sysdeps/x86_64/multiarch/wcsnlen.c

@@ -24,6 +24,7 @@
 # undef __wcsnlen
 
 # define SYMBOL_NAME wcsnlen
+# define GENERIC generic
 # include "ifunc-wcslen.h"
 
 libc_ifunc_redirected (__redirect_wcsnlen, __wcsnlen, IFUNC_SELECTOR ());