http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46142
--- Comment #7 from H.J. Lu <hjl.tools at gmail dot com> 2010-10-31 14:27:41 UTC --- When configured with --with-cpu=atom, I got FAIL: gcc.target/i386/fma3-builtin-2.c scan-assembler-times vfmadd...pd 1 FAIL: gcc.target/i386/fma3-builtin-2.c scan-assembler-times vfmsub...pd 1 FAIL: gcc.target/i386/fma3-builtin-2.c scan-assembler-times vfnmadd...pd 1 FAIL: gcc.target/i386/fma3-builtin-2.c scan-assembler-times vfnmsub...pd 1 FAIL: gcc.target/i386/fma4-builtin-2.c scan-assembler-times vfmaddpd 1 FAIL: gcc.target/i386/fma4-builtin-2.c scan-assembler-times vfmsubpd 1 FAIL: gcc.target/i386/fma4-builtin-2.c scan-assembler-times vfnmaddpd 1 FAIL: gcc.target/i386/fma4-builtin-2.c scan-assembler-times vfnmsubpd 1 since -mtune=atom disables double precision vectorizer. We need to pass -mtune=generic to those 2 testcases.