diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 38 |
1 files changed, 29 insertions, 9 deletions
diff --git a/configure.ac b/configure.ac index 5153b8b3fdc..116c5a1f68b 100644 --- a/configure.ac +++ b/configure.ac @@ -2099,6 +2099,12 @@ if test x"$pgac_armv8_crc32c_intrinsics" != x"yes"; then PGAC_ARMV8_CRC32C_INTRINSICS([-march=armv8-a+crc]) fi +# Check for LoongArch CRC intrinsics to do CRC calculations. +# +# Check if __builtin_loongarch_crcc_* intrinsics can be used +# with the default compiler flags. +PGAC_LOONGARCH_CRC32C_INTRINSICS() + AC_SUBST(CFLAGS_CRC) # Select CRC-32C implementation. @@ -2115,9 +2121,12 @@ AC_SUBST(CFLAGS_CRC) # we're not targeting such a processor, but can nevertheless produce code that # uses the CRC instructions, compile both, and select at runtime. # -# You can override this logic by setting the appropriate USE_*_CRC32 flag to 1 +# You can skip the runtime check by setting the appropriate USE_*_CRC32 flag to 1 # in the template or configure command line. -if test x"$USE_SLICING_BY_8_CRC32C" = x"" && test x"$USE_SSE42_CRC32C" = x"" && test x"$USE_SSE42_CRC32C_WITH_RUNTIME_CHECK" = x"" && test x"$USE_ARMV8_CRC32C" = x"" && test x"$USE_ARMV8_CRC32C_WITH_RUNTIME_CHECK" = x""; then +# +# If we are targeting a LoongArch processor, CRC instructions are +# always available (at least on 64 bit), so no runtime check is needed. +if test x"$USE_SLICING_BY_8_CRC32C" = x"" && test x"$USE_SSE42_CRC32C" = x"" && test x"$USE_SSE42_CRC32C_WITH_RUNTIME_CHECK" = x"" && test x"$USE_ARMV8_CRC32C" = x"" && test x"$USE_ARMV8_CRC32C_WITH_RUNTIME_CHECK" = x"" && test x"$USE_LOONGARCH_CRC32C" = x""; then # Use Intel SSE 4.2 if available. if test x"$pgac_sse42_crc32_intrinsics" = x"yes" && test x"$SSE4_2_TARGETED" = x"1" ; then USE_SSE42_CRC32C=1 @@ -2135,10 +2144,15 @@ if test x"$USE_SLICING_BY_8_CRC32C" = x"" && test x"$USE_SSE42_CRC32C" = x"" && if test x"$pgac_armv8_crc32c_intrinsics" = x"yes"; then USE_ARMV8_CRC32C_WITH_RUNTIME_CHECK=1 else - # fall back to slicing-by-8 algorithm, which doesn't require any - # special CPU support. - USE_SLICING_BY_8_CRC32C=1 - fi + # LoongArch CRCC instructions. + if test x"$pgac_loongarch_crc32c_intrinsics" = x"yes"; then + USE_LOONGARCH_CRC32C=1 + else + # fall back to slicing-by-8 algorithm, which doesn't require any + # special CPU support. + USE_SLICING_BY_8_CRC32C=1 + fi + fi fi fi fi @@ -2166,9 +2180,15 @@ else PG_CRC32C_OBJS="pg_crc32c_armv8.o pg_crc32c_sb8.o pg_crc32c_armv8_choose.o" AC_MSG_RESULT(ARMv8 CRC instructions with runtime check) else - AC_DEFINE(USE_SLICING_BY_8_CRC32C, 1, [Define to 1 to use software CRC-32C implementation (slicing-by-8).]) - PG_CRC32C_OBJS="pg_crc32c_sb8.o" - AC_MSG_RESULT(slicing-by-8) + if test x"$USE_LOONGARCH_CRC32C" = x"1"; then + AC_DEFINE(USE_LOONGARCH_CRC32C, 1, [Define to 1 to use LoongArch CRCC instructions.]) + PG_CRC32C_OBJS="pg_crc32c_loongarch.o" + AC_MSG_RESULT(LoongArch CRCC instructions) + else + AC_DEFINE(USE_SLICING_BY_8_CRC32C, 1, [Define to 1 to use software CRC-32C implementation (slicing-by-8).]) + PG_CRC32C_OBJS="pg_crc32c_sb8.o" + AC_MSG_RESULT(slicing-by-8) + fi fi fi fi |