Auto check for SSE availability

Instead of blindly forcing the compiler to use native instructions,
check the predefined macros provided by the compiler.

1 files changed, 59 insertions, 24 deletions

diff --git a/configure.ac b/configure.ac
index 1e388ce..a306972 100644
--- a/configure.ac
+++ b/configure.ac
@@ -13,6 +13,56 @@ AC_PROG_INSTALL
 
 AC_CONFIG_MACRO_DIR([m4])
 
+# Macros for SSE availability check.
+AC_DEFUN([MARISA_ENABLE_SSE2],
+          [AC_EGREP_CPP([yes], [
+#ifdef __SSE2__
+yes
+#endif
+          ], [enable_sse2="yes"], [enable_sse2="no"])])
+AC_DEFUN([MARISA_ENABLE_SSE3],
+          [AC_EGREP_CPP([yes], [
+#ifdef __SSE3__
+yes
+#endif
+          ], [enable_sse3="yes"], [enable_sse3="no"])])
+AC_DEFUN([MARISA_ENABLE_SSSE3],
+         [AC_EGREP_CPP([yes], [
+#ifdef __SSSE3__
+yes
+#endif
+         ], [enable_ssse3="yes"], [enable_ssse3="no"])])
+AC_DEFUN([MARISA_ENABLE_SSE4_1],
+         [AC_EGREP_CPP([yes], [
+#ifdef __SSE4_1__
+yes
+#endif
+         ], [enable_sse4_1="yes"], [enable_sse4_1="no"])])
+AC_DEFUN([MARISA_ENABLE_SSE4_2],
+         [AC_EGREP_CPP([yes], [
+#ifdef __SSE4_2__
+yes
+#endif
+         ], [enable_sse4_2="yes"], [enable_sse4_2="no"])])
+AC_DEFUN([MARISA_ENABLE_SSE4],
+         [AC_EGREP_CPP([yes], [
+#if defined(__POPCNT__) && defined(__SSE4_2__)
+yes
+#endif
+         ], [enable_sse4="yes"], [enable_sse4="no"])])
+AC_DEFUN([MARISA_ENABLE_SSE4A],
+         [AC_EGREP_CPP([yes], [
+#ifdef __SSE4A__
+yes
+#endif
+         ], [enable_sse4a="yes"], [enable_sse4a="no"])])
+AC_DEFUN([MARISA_ENABLE_POPCNT],
+         [AC_EGREP_CPP([yes], [
+#ifdef __POPCNT__
+yes
+#endif
+         ], [enable_popcnt="yes"], [enable_popcnt="no"])])
+
 # Checks for SSE availability.
 AC_MSG_CHECKING([whether to use SSE2])
 AC_ARG_ENABLE([sse2],
@@ -20,9 +70,7 @@ AC_ARG_ENABLE([sse2],
                               [use SSE2 [default=no]])],
               [],
               [enable_sse2="no"])
-AS_IF([test "x${enable_sse2}" != "xno"], [
-  enable_sse2="yes"
-])
+AS_IF([test "x${enable_sse2}" != "xno"], [MARISA_ENABLE_SSE2])
 AC_MSG_RESULT([${enable_sse2}])
 
 AC_MSG_CHECKING([whether to use SSE3])
@@ -31,9 +79,7 @@ AC_ARG_ENABLE([sse3],
                               [use SSE3 [default=no]])],
               [],
               [enable_sse3="no"])
-AS_IF([test "x${enable_sse3}" != "xno"], [
-  enable_sse3="yes"
-])
+AS_IF([test "x${enable_sse3}" != "xno"], [MARISA_ENABLE_SSE3])
 AC_MSG_RESULT([${enable_sse3}])
 
 AC_MSG_CHECKING([whether to use SSSE3])
@@ -42,9 +88,7 @@ AC_ARG_ENABLE([ssse3],
                               [use SSSE3 [default=no]])],
               [],
               [enable_ssse3="no"])
-AS_IF([test "x${enable_ssse3}" != "xno"], [
-  enable_ssse3="yes"
-])
+AS_IF([test "x${enable_ssse3}" != "xno"], [MARISA_ENABLE_SSSE3])
 AC_MSG_RESULT([${enable_ssse3}])
 
 AC_MSG_CHECKING([whether to use SSE4.1])
@@ -53,9 +97,7 @@ AC_ARG_ENABLE([sse4.1],
                               [use SSE4.1 [default=no]])],
               [],
               [enable_sse4_1="no"])
-AS_IF([test "x${enable_sse4_1}" != "xno"], [
-  enable_sse4_1="yes"
-])
+AS_IF([test "x${enable_sse4_1}" != "xno"], [MARISA_ENABLE_SSE4_1])
 AC_MSG_RESULT([${enable_sse4_1}])
 
 AC_MSG_CHECKING([whether to use SSE4.2])
@@ -64,9 +106,7 @@ AC_ARG_ENABLE([sse4.2],
                               [use SSE4.2 [default=no]])],
               [],
               [enable_sse4_2="no"])
-AS_IF([test "x${enable_sse4_2}" != "xno"], [
-  enable_sse4_2="yes"
-])
+AS_IF([test "x${enable_sse4_2}" != "xno"], [MARISA_ENABLE_SSE4_2])
 AC_MSG_RESULT([${enable_sse4_2}])
 
 AC_MSG_CHECKING([whether to use SSE4])
@@ -75,9 +115,7 @@ AC_ARG_ENABLE([sse4],
                               [use SSE4 [default=no]])],
               [],
               [enable_sse4="no"])
-AS_IF([test "x${enable_sse4}" != "xno"], [
-  enable_sse4="yes"
-])
+AS_IF([test "x${enable_sse4}" != "xno"], [MARISA_ENABLE_SSE4])
 AC_MSG_RESULT([${enable_sse4}])
 
 AC_MSG_CHECKING([whether to use SSE4a])
@@ -86,9 +124,7 @@ AC_ARG_ENABLE([sse4a],
                               [use SSE4a [default=no]])],
               [],
               [enable_sse4a="no"])
-AS_IF([test "x${enable_sse4a}" != "xno"], [
-  enable_sse4a="yes"
-])
+AS_IF([test "x${enable_sse4a}" != "xno"], [MARISA_ENABLE_SSE4A])
 AC_MSG_RESULT([${enable_sse4a}])
 
 AC_MSG_CHECKING([whether to use popcnt])
@@ -97,9 +133,7 @@ AC_ARG_ENABLE([popcnt],
                               [use POPCNT [default=no]])],
               [],
               [enable_popcnt="no"])
-AS_IF([test "x${enable_popcnt}" != "xno"], [
-  enable_popcnt="yes"
-])
+AS_IF([test "x${enable_popcnt}" != "xno"], [MARISA_ENABLE_POPCNT])
 AC_MSG_RESULT([${enable_popcnt}])
 
 AS_IF([test "x${enable_popcnt}" != "xno"], [
@@ -170,6 +204,7 @@ AS_ECHO(["  CXXFLAGS:  ${CXXFLAGS}"])
 AS_ECHO(["  LDFLAGS:   ${LDFLAGS}"])
 AS_ECHO(["  PREFIX:    ${prefix}"])
 AS_ECHO([])
+AS_ECHO(["  NATIVE:    ${enable_native_code}"])
 AS_ECHO(["  SSE2:      ${enable_sse2}"])
 AS_ECHO(["  SSE3:      ${enable_sse3}"])
 AS_ECHO(["  SSSE3:     ${enable_ssse3}"])