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x86: cpu: Detect Conroe CPUs and their slow shuffle unit
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@ -221,6 +221,12 @@ int ff_get_cpu_flags_x86(void)
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* functions on the Atom. */
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if (family == 6 && model == 28)
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rval |= AV_CPU_FLAG_ATOM;
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/* Conroe has a slow shuffle unit. Check the model number to ensure not
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* to include crippled low-end Penryns and Nehalems that lack SSE4. */
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if ((rval & AV_CPU_FLAG_SSSE3) && !(rval & AV_CPU_FLAG_SSE4) &&
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family == 6 && model < 23)
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rval |= AV_CPU_FLAG_SSSE3SLOW;
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}
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#endif /* cpuid */
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