diff options
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/i386/driver-i386.c | 77 |
2 files changed, 58 insertions, 25 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index bd64d9d..3a9d1f9 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2010-05-09 H.J. Lu <hongjiu.lu@intel.com> + + PR target/44046 + * config/i386/driver-i386.c (host_detect_local_cpu): Properly + detect Atom, Core 2 and Core i7. + 2010-05-09 Richard Guenther <rguenther@suse.de> * gcc.c (store_arg): Handle temporary file deletion for diff --git a/gcc/config/i386/driver-i386.c b/gcc/config/i386/driver-i386.c index 17694ef..063279a 100644 --- a/gcc/config/i386/driver-i386.c +++ b/gcc/config/i386/driver-i386.c @@ -538,34 +538,61 @@ const char *host_detect_local_cpu (int argc, const char **argv) cpu = "pentium"; break; case PROCESSOR_PENTIUMPRO: - if (model == 28) - cpu = "atom"; - else if (model >= 28 && l2sizekb < 2048) - /* Assume it's a small core if there's less than 2MB cache */ - cpu = "atom"; - else if (has_longmode) - cpu = "core2"; - else if (arch) + switch (model) { - if (has_sse3) - /* It is Core Duo. */ - cpu = "pentium-m"; - else if (has_sse2) - /* It is Pentium M. */ - cpu = "pentium-m"; - else if (has_sse) - /* It is Pentium III. */ - cpu = "pentium3"; - else if (has_mmx) - /* It is Pentium II. */ - cpu = "pentium2"; + case 0x1c: + case 0x26: + /* Atom. */ + cpu = "atom"; + break; + case 0x1a: + case 0x1e: + case 0x1f: + case 0x2e: + /* FIXME: Optimize for Nehalem. */ + cpu = "core2"; + break; + case 0x25: + case 0x2f: + /* FIXME: Optimize for Westmere. */ + cpu = "core2"; + break; + case 0x17: + case 0x1d: + /* Penryn. FIXME: -mtune=core2 is slower than -mtune=generic */ + cpu = "core2"; + break; + case 0x0f: + /* Merom. FIXME: -mtune=core2 is slower than -mtune=generic */ + cpu = "core2"; + break; + default: + if (arch) + { + if (has_ssse3) + /* If it is an unknown CPU with SSSE3, assume Core 2. */ + cpu = "core2"; + else if (has_sse3) + /* It is Core Duo. */ + cpu = "pentium-m"; + else if (has_sse2) + /* It is Pentium M. */ + cpu = "pentium-m"; + else if (has_sse) + /* It is Pentium III. */ + cpu = "pentium3"; + else if (has_mmx) + /* It is Pentium II. */ + cpu = "pentium2"; + else + /* Default to Pentium Pro. */ + cpu = "pentiumpro"; + } else - /* Default to Pentium Pro. */ - cpu = "pentiumpro"; + /* For -mtune, we default to -mtune=generic. */ + cpu = "generic"; + break; } - else - /* For -mtune, we default to -mtune=generic. */ - cpu = "generic"; break; case PROCESSOR_PENTIUM4: if (has_sse3) |