diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 6351dd708..7fbecbf8d 100644 --- a/configure.ac +++ b/configure.ac @@ -524,6 +524,57 @@ CFLAGS=$ac_save_CFLAGS LDFLAGS=$ac_save_LDFLAGS ac_c_werror_flag=$cu_save_c_werror_flag +AC_MSG_CHECKING([if __get_cpuid available]) +AC_COMPILE_IFELSE( + [AC_LANG_SOURCE([[ + #include <cpuid.h> + + int main(void) + { + unsigned int eax, ebx, ecx, edx; + __get_cpuid(1, &eax, &ebx, &ecx, &edx); + return 1; + } + ]]) + ],[ + AC_MSG_RESULT([yes]) + AC_DEFINE([HAVE_CPUID], [1], [__get_cpuid available]) + cpuid_exists=yes + ],[ + AC_MSG_RESULT([no]) + ]) + +ac_save_CFLAGS=$CFLAGS +CFLAGS="-mavx -mpclmul $CFLAGS" +AC_MSG_CHECKING([if pclmul intrinsic exists]) +AC_COMPILE_IFELSE( + [AC_LANG_SOURCE([[ + #include <x86intrin.h> + + int main(void) + { + __m128i a, b; + a = _mm_clmulepi64_si128(a, b, 0x00); + return 1; + } + ]]) + ],[ + AC_MSG_RESULT([yes]) + AC_DEFINE([HAVE_PCLMUL_INTRINSIC], [1], [pclmul intrinsic exists]) + pclmul_intrinsic_exists=yes + ],[ + AC_MSG_RESULT([no]) + ]) +if test "x$cpuid_exists" = "xyes" && + test "x$pclmul_intrinsic_exists" = "xyes"; then + AC_DEFINE([USE_PCLMUL_CRC32], [1], + [CRC32 calculation by pclmul hardware instruction enabled]) +fi +AM_CONDITIONAL([USE_PCLMUL_CRC32], + [test "x$cpuid_exists" = "xyes" && + test "x$pclmul_intrinsic_exists" = "xyes"]) +CFLAGS=$ac_save_CFLAGS + ############################################################################ dnl Autogenerated by the 'gen-lists-of-programs.sh' auxiliary script. |