diff --git a/m4/ax_cc_maxopt.m4 b/m4/ax_cc_maxopt.m4 index 72407f3b6a5f29758fbb7b41afda9357ce4210ec..282668af72e638b0f73e9d84b1822b60a0ddda21 100644 --- a/m4/ax_cc_maxopt.m4 +++ b/m4/ax_cc_maxopt.m4 @@ -133,6 +133,14 @@ if test "$ac_test_CFLAGS" != "set"; then *000?f[[346]]?:*:*:*|?f[[346]]?:*:*:*|f[[346]]?:*:*:*) icc_flags="-xSSE3 -xP -xO -xN -xW -xK" ;; *00??f??:*:*:*|??f??:*:*:*|?f??:*:*:*|f??:*:*:*) icc_flags="-xSSE2 -xN -xW -xK" ;; esac ;; + *:68747541:444d4163:69746e65) # AMDs with AVX2 support. + case $ax_cv_gcc_x86_cpuid_1 in + *061?f??:*:*:*|61?f??:*:*:*) icc_flags="-march=core-avx2" ;; + *06??f??:*:*:*|6??f??:*:*:*) icc_flags="-march=core-avx2" ;; + *070?f??:*:*:*|70?f??:*:*:*) icc_flags="-march=core-avx2" ;; + 83?f??:*:*:*) icc_flags="-march=core-avx2" + CFLAGS="$CFLAGS -fma -ftz -fomit-frame-pointer";; # EPYC + esac ;; esac ;; esac if test "x$icc_flags" != x; then