From 608d6b474334b038fef10cf51e081828ff75d6b7 Mon Sep 17 00:00:00 2001
From: Rolf Eike Beer <eike@sf-mail.de>
Date: Wed, 9 Jan 2013 19:39:43 +0100
Subject: [PATCH] SystemInformation: determine processor features on Intel Macs
Change-Id: I3adc0d179c210e10098b84ac47b9401b1c7b2ecc
---
SystemInformation.cxx | 66 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 66 insertions(+)
diff --git a/SystemInformation.cxx b/SystemInformation.cxx
index ef79626..59a9abe 100644
--- a/SystemInformation.cxx
+++ b/SystemInformation.cxx
@@ -4013,6 +4013,72 @@ bool SystemInformationImplementation::ParseSysCtl()
{
this->ChipID.Revision = static_cast< int >( value );
}
+
+ // feature string
+ char *buf = 0;
+ size_t allocSize = 128;
+
+ err = 0;
+ len = 0;
+
+ // sysctlbyname() will return with err==0 && len==0 if the buffer is too small
+ while (err == 0 && len == 0)
+ {
+ delete[] buf;
+ allocSize *= 2;
+ buf = new char[allocSize];
+ if (!buf)
+ {
+ break;
+ }
+ buf[0] = ' ';
+ len = allocSize - 2; // keep space for leading and trailing space
+ err = sysctlbyname("machdep.cpu.features", buf + 1, &len, NULL, 0);
+ }
+ if (!err && buf && len)
+ {
+ // now we can match every flags as space + flag + space
+ buf[len + 1] = ' ';
+ kwsys_stl::string cpuflags(buf, len + 2);
+
+ if ((cpuflags.find(" FPU ")!=kwsys_stl::string::npos))
+ {
+ this->Features.HasFPU = true;
+ }
+ if ((cpuflags.find(" TSC ")!=kwsys_stl::string::npos))
+ {
+ this->Features.HasTSC = true;
+ }
+ if ((cpuflags.find(" MMX ")!=kwsys_stl::string::npos))
+ {
+ this->Features.HasMMX = true;
+ }
+ if ((cpuflags.find(" SSE ")!=kwsys_stl::string::npos))
+ {
+ this->Features.HasSSE = true;
+ }
+ if ((cpuflags.find(" SSE2 ")!=kwsys_stl::string::npos))
+ {
+ this->Features.HasSSE2 = true;
+ }
+ if ((cpuflags.find(" APIC ")!=kwsys_stl::string::npos))
+ {
+ this->Features.HasAPIC = true;
+ }
+ if ((cpuflags.find(" CMOV ")!=kwsys_stl::string::npos))
+ {
+ this->Features.HasCMOV = true;
+ }
+ if ((cpuflags.find(" MTRR ")!=kwsys_stl::string::npos))
+ {
+ this->Features.HasMTRR = true;
+ }
+ if ((cpuflags.find(" ACPI ")!=kwsys_stl::string::npos))
+ {
+ this->Features.HasACPI = true;
+ }
+ }
+ delete[] buf;
}
// brand string
--
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