diff --git a/Zend/zend_portability.h b/Zend/zend_portability.h
index c561e0fdf2d..e1370eecf88 100644
--- a/Zend/zend_portability.h
+++ b/Zend/zend_portability.h
@@ -494,21 +494,21 @@ extern "C++" {
 #endif
 
 #if (defined(__i386__) || defined(__x86_64__))
-# if PHP_HAVE_SSSE3_INSTRUCTIONS && defined(HAVE_TMMINTRIN_H)
-# define PHP_HAVE_SSSE3
+# if defined(HAVE_TMMINTRIN_H)
+#  define PHP_HAVE_SSSE3
 # endif
 
-# if PHP_HAVE_SSE4_2_INSTRUCTIONS && defined(HAVE_NMMINTRIN_H)
-# define PHP_HAVE_SSE4_2
+# if defined(HAVE_NMMINTRIN_H)
+#  define PHP_HAVE_SSE4_2
 # endif
 
 /*
  * AVX2 support was added in gcc 4.7, but AVX2 intrinsics don't work in
  * __attribute__((target("avx2"))) functions until gcc 4.9.
  */
-# if PHP_HAVE_AVX2_INSTRUCTIONS && defined(HAVE_IMMINTRIN_H) && \
+# if defined(HAVE_IMMINTRIN_H) && \
   (defined(__llvm__) || defined(__clang__) || (defined(__GNUC__) && ZEND_GCC_VERSION >= 4009))
-# define PHP_HAVE_AVX2
+#  define PHP_HAVE_AVX2
 # endif
 #endif
 
diff --git a/build/php.m4 b/build/php.m4
index 0ccd919344b..e3548e7cfa2 100644
--- a/build/php.m4
+++ b/build/php.m4
@@ -2669,30 +2669,6 @@ AC_DEFUN([PHP_CHECK_BUILTIN_CPU_SUPPORTS], [
    [$have_builtin_cpu_supports], [Whether the compiler supports __builtin_cpu_supports])
 ])
 
-dnl
-dnl PHP_CHECK_CPU_SUPPORTS
-dnl
-AC_DEFUN([PHP_CHECK_CPU_SUPPORTS], [
-  AC_REQUIRE([PHP_CHECK_BUILTIN_CPU_INIT])
-  AC_REQUIRE([PHP_CHECK_BUILTIN_CPU_SUPPORTS])
-  have_ext_instructions=0
-  if test $have_builtin_cpu_supports = 1; then
-    AC_MSG_CHECKING([for $1 instructions supports])
-    AC_RUN_IFELSE([AC_LANG_SOURCE([[
-int main() {
-	return __builtin_cpu_supports("$1")? 0 : 1;
-}
-    ]])], [
-      have_ext_instructions=1
-      AC_MSG_RESULT([yes])
-    ], [
-      AC_MSG_RESULT([no])
-    ], [AC_MSG_RESULT([no])])
-  fi
-  AC_DEFINE_UNQUOTED(AS_TR_CPP([PHP_HAVE_$1_INSTRUCTIONS]),
-   [$have_ext_instructions], [Whether the compiler supports $1 instructions])
-])
-
 dnl
 dnl PHP_PATCH_CONFIG_HEADERS([FILE])
 dnl
diff --git a/configure.ac b/configure.ac
index 50cfd0d4190..1a17aa904da 100644
--- a/configure.ac
+++ b/configure.ac
@@ -499,12 +499,6 @@ PHP_CHECK_BUILTIN_CPU_INIT
 dnl Check __builtin_cpu_supports
 PHP_CHECK_BUILTIN_CPU_SUPPORTS
 
-dnl Check instructions.
-PHP_CHECK_CPU_SUPPORTS([ssse3])
-PHP_CHECK_CPU_SUPPORTS([sse4.2])
-PHP_CHECK_CPU_SUPPORTS([avx])
-PHP_CHECK_CPU_SUPPORTS([avx2])
-
 dnl Check for structure members.
 AC_CHECK_MEMBERS([struct tm.tm_gmtoff],,,[#include <time.h>])
 AC_CHECK_MEMBERS([struct stat.st_blksize, struct stat.st_rdev])