diff options
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 21 |
1 files changed, 2 insertions, 19 deletions
diff --git a/configure.in b/configure.in index da02a56ec66..c3841d5b07f 100644 --- a/configure.in +++ b/configure.in @@ -2014,22 +2014,6 @@ if test x"$pgac_armv8_crc32c_intrinsics" != x"yes"; then fi AC_SUBST(CFLAGS_ARMV8_CRC32C) -# In order to detect at runtime, if the ARM CRC Extension is available, -# we will do "getauxval(AT_HWCAP) & HWCAP_CRC32". Check if we have -# everything we need for that. -AC_CHECK_FUNCS([getauxval]) -AC_COMPILE_IFELSE([AC_LANG_PROGRAM([ -#include <sys/auxv.h> -#include <asm/hwcap.h> -], [ -#ifndef AT_HWCAP -#error AT_HWCAP not defined -#endif -#ifndef HWCAP_CRC32 -#error HWCAP_CRC32 not defined -#endif -])], [HAVE_HWCAP_CRC32=1]) - # Select CRC-32C implementation. # # If we are targeting a processor that has Intel SSE 4.2 instructions, we can @@ -2060,9 +2044,8 @@ if test x"$USE_SLICING_BY_8_CRC32C" = x"" && test x"$USE_SSE42_CRC32C" = x"" && if test x"$pgac_armv8_crc32c_intrinsics" = x"yes" && test x"$CFLAGS_ARMV8_CRC32C" = x""; then USE_ARMV8_CRC32C=1 else - # ARM CRC Extension, with runtime check? The getauxval() function and - # HWCAP_CRC32 are needed for the runtime check. - if test x"$pgac_armv8_crc32c_intrinsics" = x"yes" && test x"$ac_cv_func_getauxval" = x"yes" && test x"$HAVE_HWCAP_CRC32" = x"1"; then + # ARM CRC Extension, with runtime check? + if test x"$pgac_armv8_crc32c_intrinsics" = x"yes"; then USE_ARMV8_CRC32C_WITH_RUNTIME_CHECK=1 else # fall back to slicing-by-8 algorithm, which doesn't require any |