44 lines
1.2 KiB
Diff
44 lines
1.2 KiB
Diff
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2009-05-20 H.J. Lu <hongjiu.lu@intel.com>
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* config/i386/driver-i386.c (host_detect_local_cpu): Check
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extended family and model for Intel processors. Support Intel
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Atom.
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--- gcc/config/i386/driver-i386.c (revision 147735)
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+++ gcc/config/i386/driver-i386.c (revision 147736)
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@@ -395,9 +395,22 @@ const char *host_detect_local_cpu (int a
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__cpuid (1, eax, ebx, ecx, edx);
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- /* We don't care for extended family. */
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model = (eax >> 4) & 0x0f;
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family = (eax >> 8) & 0x0f;
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+ if (vendor == SIG_INTEL)
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+ {
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+ unsigned int extended_model, extended_family;
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+
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+ extended_model = (eax >> 12) & 0xf0;
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+ extended_family = (eax >> 20) & 0xff;
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+ if (family == 0x0f)
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+ {
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+ family += extended_family;
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+ model += extended_model;
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+ }
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+ else if (family == 0x06)
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+ model += extended_model;
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+ }
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has_sse3 = ecx & bit_SSE3;
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has_ssse3 = ecx & bit_SSSE3;
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@@ -496,8 +509,8 @@ const char *host_detect_local_cpu (int a
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break;
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case PROCESSOR_PENTIUMPRO:
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if (has_longmode)
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- /* It is Core 2 Duo. */
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- cpu = "core2";
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+ /* It is Core 2 or Atom. */
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+ cpu = (model == 28) ? "atom" : "core2";
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else if (arch)
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{
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if (has_sse3)
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