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2014-02-18 Jakub Jelinek <jakub@redhat.com>
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Uros Bizjak <ubizjak@gmail.com>
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PR driver/60233
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* config/i386/driver-i386.c (host_detect_local_cpu): If
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YMM state is not saved by the OS, also clear has_f16c. Move
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CPUID 0x80000001 handling before YMM state saving checking.
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--- gcc/config/i386/driver-i386.c (revision 207833)
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+++ gcc/config/i386/driver-i386.c (revision 207834)
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@@ -488,6 +488,28 @@ const char *host_detect_local_cpu (int a
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has_xsaveopt = eax & bit_XSAVEOPT;
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}
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+ /* Check cpuid level of extended features. */
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+ __cpuid (0x80000000, ext_level, ebx, ecx, edx);
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+
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+ if (ext_level > 0x80000000)
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+ {
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+ __cpuid (0x80000001, eax, ebx, ecx, edx);
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+
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+ has_lahf_lm = ecx & bit_LAHF_LM;
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+ has_sse4a = ecx & bit_SSE4a;
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+ has_abm = ecx & bit_ABM;
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+ has_lwp = ecx & bit_LWP;
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+ has_fma4 = ecx & bit_FMA4;
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+ has_xop = ecx & bit_XOP;
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+ has_tbm = ecx & bit_TBM;
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+ has_lzcnt = ecx & bit_LZCNT;
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+ has_prfchw = ecx & bit_PRFCHW;
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+
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+ has_longmode = edx & bit_LM;
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+ has_3dnowp = edx & bit_3DNOWP;
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+ has_3dnow = edx & bit_3DNOW;
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+ }
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+
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/* Get XCR_XFEATURE_ENABLED_MASK register with xgetbv. */
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#define XCR_XFEATURE_ENABLED_MASK 0x0
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#define XSTATE_FP 0x1
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@@ -506,33 +528,12 @@ const char *host_detect_local_cpu (int a
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has_avx2 = 0;
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has_fma = 0;
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has_fma4 = 0;
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+ has_f16c = 0;
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has_xop = 0;
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has_xsave = 0;
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has_xsaveopt = 0;
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}
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- /* Check cpuid level of extended features. */
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- __cpuid (0x80000000, ext_level, ebx, ecx, edx);
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-
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- if (ext_level > 0x80000000)
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- {
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- __cpuid (0x80000001, eax, ebx, ecx, edx);
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-
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- has_lahf_lm = ecx & bit_LAHF_LM;
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- has_sse4a = ecx & bit_SSE4a;
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- has_abm = ecx & bit_ABM;
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- has_lwp = ecx & bit_LWP;
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- has_fma4 = ecx & bit_FMA4;
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- has_xop = ecx & bit_XOP;
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- has_tbm = ecx & bit_TBM;
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- has_lzcnt = ecx & bit_LZCNT;
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- has_prfchw = ecx & bit_PRFCHW;
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-
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- has_longmode = edx & bit_LM;
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- has_3dnowp = edx & bit_3DNOWP;
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- has_3dnow = edx & bit_3DNOW;
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- }
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-
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if (!arch)
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{
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if (vendor == signature_AMD_ebx
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