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

/* Enumerate available IFUNC implementations of a function.  x86-64 version.
   Copyright (C) 2012-2016 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/>.  */

#include <assert.h>
#include <string.h>
#include <wchar.h>
#include <ifunc-impl-list.h>
#include <sysdep.h>
#include "init-arch.h"

/* Maximum number of IFUNC implementations.  */
#define MAX_IFUNC	5

/* Fill ARRAY of MAX elements with IFUNC implementations for function
   NAME supported on target machine and return the number of valid
   entries.  */

size_t
__libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
			size_t max)
{
  assert (max >= MAX_IFUNC);

  size_t i = 0;

  /* Support sysdeps/x86_64/multiarch/memcmp.S.  */
  IFUNC_IMPL (i, name, memcmp,
	      IFUNC_IMPL_ADD (array, i, memcmp, HAS_CPU_FEATURE (SSE4_1),
			      __memcmp_sse4_1)
	      IFUNC_IMPL_ADD (array, i, memcmp, HAS_CPU_FEATURE (SSSE3),
			      __memcmp_ssse3)
	      IFUNC_IMPL_ADD (array, i, memcmp, 1, __memcmp_sse2))

  /* Support sysdeps/x86_64/multiarch/memmove_chk.c.  */
  IFUNC_IMPL (i, name, __memmove_chk,
#ifdef HAVE_AVX512_ASM_SUPPORT
	      IFUNC_IMPL_ADD (array, i, __memmove_chk,
			      HAS_ARCH_FEATURE (AVX512F_Usable),
			      __memmove_chk_avx512_no_vzeroupper)
#endif
	      IFUNC_IMPL_ADD (array, i, __memmove_chk,
			      HAS_ARCH_FEATURE (AVX_Usable),
			      __memmove_chk_avx_unaligned)
	      IFUNC_IMPL_ADD (array, i, __memmove_chk,
			      HAS_CPU_FEATURE (SSSE3),
			      __memmove_chk_ssse3_back)
	      IFUNC_IMPL_ADD (array, i, __memmove_chk,
			      HAS_CPU_FEATURE (SSSE3),
			      __memmove_chk_ssse3)
	      IFUNC_IMPL_ADD (array, i, __memmove_chk, 1,
			      __memmove_chk_sse2))

  /* Support sysdeps/x86_64/multiarch/memmove.S.  */
  IFUNC_IMPL (i, name, memmove,
	      IFUNC_IMPL_ADD (array, i, memmove,
			      HAS_ARCH_FEATURE (AVX_Usable),
			      __memmove_avx_unaligned)
#ifdef HAVE_AVX512_ASM_SUPPORT
	      IFUNC_IMPL_ADD (array, i, memmove,
			      HAS_ARCH_FEATURE (AVX512F_Usable),
			      __memmove_avx512_no_vzeroupper)
#endif
	      IFUNC_IMPL_ADD (array, i, memmove, HAS_CPU_FEATURE (SSSE3),
			      __memmove_ssse3_back)
	      IFUNC_IMPL_ADD (array, i, memmove, HAS_CPU_FEATURE (SSSE3),
			      __memmove_ssse3)
	      IFUNC_IMPL_ADD (array, i, memmove, 1, __memmove_sse2))

  /* Support sysdeps/x86_64/multiarch/memset_chk.S.  */
  IFUNC_IMPL (i, name, __memset_chk,
	      IFUNC_IMPL_ADD (array, i, __memset_chk, 1,
			      __memset_chk_sse2)
	      IFUNC_IMPL_ADD (array, i, __memset_chk,
			      HAS_ARCH_FEATURE (AVX2_Usable),
			      __memset_chk_avx2)
#ifdef HAVE_AVX512_ASM_SUPPORT
	      IFUNC_IMPL_ADD (array, i, __memset_chk,
			      HAS_ARCH_FEATURE (AVX512F_Usable),
			      __memset_chk_avx512_no_vzeroupper)
#endif
	      )

  /* Support sysdeps/x86_64/multiarch/memset.S.  */
  IFUNC_IMPL (i, name, memset,
	      IFUNC_IMPL_ADD (array, i, memset, 1, __memset_sse2)
	      IFUNC_IMPL_ADD (array, i, memset,
			      HAS_ARCH_FEATURE (AVX2_Usable),
			      __memset_avx2)
#ifdef HAVE_AVX512_ASM_SUPPORT
	      IFUNC_IMPL_ADD (array, i, memset,
			      HAS_ARCH_FEATURE (AVX512F_Usable),
			      __memset_avx512_no_vzeroupper)
#endif
	     )

  /* Support sysdeps/x86_64/multiarch/stpncpy.S.  */
  IFUNC_IMPL (i, name, stpncpy,
	      IFUNC_IMPL_ADD (array, i, stpncpy, HAS_CPU_FEATURE (SSSE3),
			      __stpncpy_ssse3)
	      IFUNC_IMPL_ADD (array, i, stpncpy, 1,
			      __stpncpy_sse2_unaligned)
	      IFUNC_IMPL_ADD (array, i, stpncpy, 1, __stpncpy_sse2))

  /* Support sysdeps/x86_64/multiarch/stpcpy.S.  */
  IFUNC_IMPL (i, name, stpcpy,
	      IFUNC_IMPL_ADD (array, i, stpcpy, HAS_CPU_FEATURE (SSSE3),
			      __stpcpy_ssse3)
	      IFUNC_IMPL_ADD (array, i, stpcpy, 1, __stpcpy_sse2_unaligned)
	      IFUNC_IMPL_ADD (array, i, stpcpy, 1, __stpcpy_sse2))

  /* Support sysdeps/x86_64/multiarch/strcasecmp_l.S.  */
  IFUNC_IMPL (i, name, strcasecmp,
	      IFUNC_IMPL_ADD (array, i, strcasecmp,
			      HAS_ARCH_FEATURE (AVX_Usable),
			      __strcasecmp_avx)
	      IFUNC_IMPL_ADD (array, i, strcasecmp,
			      HAS_CPU_FEATURE (SSE4_2),
			      __strcasecmp_sse42)
	      IFUNC_IMPL_ADD (array, i, strcasecmp,
			      HAS_CPU_FEATURE (SSSE3),
			      __strcasecmp_ssse3)
	      IFUNC_IMPL_ADD (array, i, strcasecmp, 1, __strcasecmp_sse2))

  /* Support sysdeps/x86_64/multiarch/strcasecmp_l.S.  */
  IFUNC_IMPL (i, name, strcasecmp_l,
	      IFUNC_IMPL_ADD (array, i, strcasecmp_l,
			      HAS_ARCH_FEATURE (AVX_Usable),
			      __strcasecmp_l_avx)
	      IFUNC_IMPL_ADD (array, i, strcasecmp_l,
			      HAS_CPU_FEATURE (SSE4_2),
			      __strcasecmp_l_sse42)
	      IFUNC_IMPL_ADD (array, i, strcasecmp_l,
			      HAS_CPU_FEATURE (SSSE3),
			      __strcasecmp_l_ssse3)
	      IFUNC_IMPL_ADD (array, i, strcasecmp_l, 1,
			      __strcasecmp_l_sse2))

  /* Support sysdeps/x86_64/multiarch/strcat.S.  */
  IFUNC_IMPL (i, name, strcat,
	      IFUNC_IMPL_ADD (array, i, strcat, HAS_CPU_FEATURE (SSSE3),
			      __strcat_ssse3)
	      IFUNC_IMPL_ADD (array, i, strcat, 1, __strcat_sse2_unaligned)
	      IFUNC_IMPL_ADD (array, i, strcat, 1, __strcat_sse2))

  /* Support sysdeps/x86_64/multiarch/strchr.S.  */
  IFUNC_IMPL (i, name, strchr,
	      IFUNC_IMPL_ADD (array, i, strchr, 1, __strchr_sse2_no_bsf)
	      IFUNC_IMPL_ADD (array, i, strchr, 1, __strchr_sse2))

  /* Support sysdeps/x86_64/multiarch/strcmp.S.  */
  IFUNC_IMPL (i, name, strcmp,
	      IFUNC_IMPL_ADD (array, i, strcmp, HAS_CPU_FEATURE (SSE4_2),
			      __strcmp_sse42)
	      IFUNC_IMPL_ADD (array, i, strcmp, HAS_CPU_FEATURE (SSSE3),
			      __strcmp_ssse3)
	      IFUNC_IMPL_ADD (array, i, strcmp, 1, __strcmp_sse2_unaligned)
	      IFUNC_IMPL_ADD (array, i, strcmp, 1, __strcmp_sse2))

  /* Support sysdeps/x86_64/multiarch/strcpy.S.  */
  IFUNC_IMPL (i, name, strcpy,
	      IFUNC_IMPL_ADD (array, i, strcpy, HAS_CPU_FEATURE (SSSE3),
			      __strcpy_ssse3)
	      IFUNC_IMPL_ADD (array, i, strcpy, 1, __strcpy_sse2_unaligned)
	      IFUNC_IMPL_ADD (array, i, strcpy, 1, __strcpy_sse2))

  /* Support sysdeps/x86_64/multiarch/strcspn.S.  */
  IFUNC_IMPL (i, name, strcspn,
	      IFUNC_IMPL_ADD (array, i, strcspn, HAS_CPU_FEATURE (SSE4_2),
			      __strcspn_sse42)
	      IFUNC_IMPL_ADD (array, i, strcspn, 1, __strcspn_sse2))

  /* Support sysdeps/x86_64/multiarch/strncase_l.S.  */
  IFUNC_IMPL (i, name, strncasecmp,
	      IFUNC_IMPL_ADD (array, i, strncasecmp,
			      HAS_ARCH_FEATURE (AVX_Usable),
			      __strncasecmp_avx)
	      IFUNC_IMPL_ADD (array, i, strncasecmp,
			      HAS_CPU_FEATURE (SSE4_2),
			      __strncasecmp_sse42)
	      IFUNC_IMPL_ADD (array, i, strncasecmp,
			      HAS_CPU_FEATURE (SSSE3),
			      __strncasecmp_ssse3)
	      IFUNC_IMPL_ADD (array, i, strncasecmp, 1,
			      __strncasecmp_sse2))

  /* Support sysdeps/x86_64/multiarch/strncase_l.S.  */
  IFUNC_IMPL (i, name, strncasecmp_l,
	      IFUNC_IMPL_ADD (array, i, strncasecmp_l,
			      HAS_ARCH_FEATURE (AVX_Usable),
			      __strncasecmp_l_avx)
	      IFUNC_IMPL_ADD (array, i, strncasecmp_l,
			      HAS_CPU_FEATURE (SSE4_2),
			      __strncasecmp_l_sse42)
	      IFUNC_IMPL_ADD (array, i, strncasecmp_l,
			      HAS_CPU_FEATURE (SSSE3),
			      __strncasecmp_l_ssse3)
	      IFUNC_IMPL_ADD (array, i, strncasecmp_l, 1,
			      __strncasecmp_l_sse2))

  /* Support sysdeps/x86_64/multiarch/strncat.S.  */
  IFUNC_IMPL (i, name, strncat,
	      IFUNC_IMPL_ADD (array, i, strncat, HAS_CPU_FEATURE (SSSE3),
			      __strncat_ssse3)
	      IFUNC_IMPL_ADD (array, i, strncat, 1,
			      __strncat_sse2_unaligned)
	      IFUNC_IMPL_ADD (array, i, strncat, 1, __strncat_sse2))

  /* Support sysdeps/x86_64/multiarch/strncpy.S.  */
  IFUNC_IMPL (i, name, strncpy,
	      IFUNC_IMPL_ADD (array, i, strncpy, HAS_CPU_FEATURE (SSSE3),
			      __strncpy_ssse3)
	      IFUNC_IMPL_ADD (array, i, strncpy, 1,
			      __strncpy_sse2_unaligned)
	      IFUNC_IMPL_ADD (array, i, strncpy, 1, __strncpy_sse2))

  /* Support sysdeps/x86_64/multiarch/strpbrk.S.  */
  IFUNC_IMPL (i, name, strpbrk,
	      IFUNC_IMPL_ADD (array, i, strpbrk, HAS_CPU_FEATURE (SSE4_2),
			      __strpbrk_sse42)
	      IFUNC_IMPL_ADD (array, i, strpbrk, 1, __strpbrk_sse2))


  /* Support sysdeps/x86_64/multiarch/strspn.S.  */
  IFUNC_IMPL (i, name, strspn,
	      IFUNC_IMPL_ADD (array, i, strspn, HAS_CPU_FEATURE (SSE4_2),
			      __strspn_sse42)
	      IFUNC_IMPL_ADD (array, i, strspn, 1, __strspn_sse2))

  /* Support sysdeps/x86_64/multiarch/strstr.c.  */
  IFUNC_IMPL (i, name, strstr,
	      IFUNC_IMPL_ADD (array, i, strstr, 1, __strstr_sse2_unaligned)
	      IFUNC_IMPL_ADD (array, i, strstr, 1, __strstr_sse2))

  /* Support sysdeps/x86_64/multiarch/wcscpy.S.  */
  IFUNC_IMPL (i, name, wcscpy,
	      IFUNC_IMPL_ADD (array, i, wcscpy, HAS_CPU_FEATURE (SSSE3),
			      __wcscpy_ssse3)
	      IFUNC_IMPL_ADD (array, i, wcscpy, 1, __wcscpy_sse2))

  /* Support sysdeps/x86_64/multiarch/wmemcmp.S.  */
  IFUNC_IMPL (i, name, wmemcmp,
	      IFUNC_IMPL_ADD (array, i, wmemcmp, HAS_CPU_FEATURE (SSE4_1),
			      __wmemcmp_sse4_1)
	      IFUNC_IMPL_ADD (array, i, wmemcmp, HAS_CPU_FEATURE (SSSE3),
			      __wmemcmp_ssse3)
	      IFUNC_IMPL_ADD (array, i, wmemcmp, 1, __wmemcmp_sse2))

#ifdef SHARED
  /* Support sysdeps/x86_64/multiarch/memcpy_chk.S.  */
  IFUNC_IMPL (i, name, __memcpy_chk,
#ifdef HAVE_AVX512_ASM_SUPPORT
	      IFUNC_IMPL_ADD (array, i, __memcpy_chk,
			      HAS_ARCH_FEATURE (AVX512F_Usable),
			      __memcpy_chk_avx512_no_vzeroupper)
#endif
	      IFUNC_IMPL_ADD (array, i, __memcpy_chk,
			      HAS_ARCH_FEATURE (AVX_Usable),
			      __memcpy_chk_avx_unaligned)
	      IFUNC_IMPL_ADD (array, i, __memcpy_chk,
			      HAS_CPU_FEATURE (SSSE3),
			      __memcpy_chk_ssse3_back)
	      IFUNC_IMPL_ADD (array, i, __memcpy_chk,
			      HAS_CPU_FEATURE (SSSE3),
			      __memcpy_chk_ssse3)
	      IFUNC_IMPL_ADD (array, i, __memcpy_chk, 1,
			      __memcpy_chk_sse2))

  /* Support sysdeps/x86_64/multiarch/memcpy.S.  */
  IFUNC_IMPL (i, name, memcpy,
	      IFUNC_IMPL_ADD (array, i, memcpy,
			      HAS_ARCH_FEATURE (AVX_Usable),
			      __memcpy_avx_unaligned)
	      IFUNC_IMPL_ADD (array, i, memcpy, HAS_CPU_FEATURE (SSSE3),
			      __memcpy_ssse3_back)
	      IFUNC_IMPL_ADD (array, i, memcpy, HAS_CPU_FEATURE (SSSE3),
			      __memcpy_ssse3)
#ifdef HAVE_AVX512_ASM_SUPPORT
	      IFUNC_IMPL_ADD (array, i, memcpy,
			      HAS_ARCH_FEATURE (AVX512F_Usable),
			      __memcpy_avx512_no_vzeroupper)
#endif
	      IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_sse2_unaligned)
	      IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_sse2))

  /* Support sysdeps/x86_64/multiarch/mempcpy_chk.S.  */
  IFUNC_IMPL (i, name, __mempcpy_chk,
#ifdef HAVE_AVX512_ASM_SUPPORT
	      IFUNC_IMPL_ADD (array, i, __mempcpy_chk,
			      HAS_ARCH_FEATURE (AVX512F_Usable),
			      __mempcpy_chk_avx512_no_vzeroupper)
#endif
	      IFUNC_IMPL_ADD (array, i, __mempcpy_chk,
			      HAS_ARCH_FEATURE (AVX_Usable),
			      __mempcpy_chk_avx_unaligned)
	      IFUNC_IMPL_ADD (array, i, __mempcpy_chk,
			      HAS_CPU_FEATURE (SSSE3),
			      __mempcpy_chk_ssse3_back)
	      IFUNC_IMPL_ADD (array, i, __mempcpy_chk,
			      HAS_CPU_FEATURE (SSSE3),
			      __mempcpy_chk_ssse3)
	      IFUNC_IMPL_ADD (array, i, __mempcpy_chk, 1,
			      __mempcpy_chk_sse2))

  /* Support sysdeps/x86_64/multiarch/mempcpy.S.  */
  IFUNC_IMPL (i, name, mempcpy,
#ifdef HAVE_AVX512_ASM_SUPPORT
	      IFUNC_IMPL_ADD (array, i, mempcpy,
			      HAS_ARCH_FEATURE (AVX512F_Usable),
			      __mempcpy_avx512_no_vzeroupper)
#endif
	      IFUNC_IMPL_ADD (array, i, mempcpy,
			      HAS_ARCH_FEATURE (AVX_Usable),
			      __mempcpy_avx_unaligned)
	      IFUNC_IMPL_ADD (array, i, mempcpy, HAS_CPU_FEATURE (SSSE3),
			      __mempcpy_ssse3_back)
	      IFUNC_IMPL_ADD (array, i, mempcpy, HAS_CPU_FEATURE (SSSE3),
			      __mempcpy_ssse3)
	      IFUNC_IMPL_ADD (array, i, mempcpy, 1, __mempcpy_sse2))

  /* Support sysdeps/x86_64/multiarch/strncmp.S.  */
  IFUNC_IMPL (i, name, strncmp,
	      IFUNC_IMPL_ADD (array, i, strncmp, HAS_CPU_FEATURE (SSE4_2),
			      __strncmp_sse42)
	      IFUNC_IMPL_ADD (array, i, strncmp, HAS_CPU_FEATURE (SSSE3),
			      __strncmp_ssse3)
	      IFUNC_IMPL_ADD (array, i, strncmp, 1, __strncmp_sse2))
#endif

  return i;
}