From 39ed87570bdb2f86969d4be821c94b722dc71179 Mon Sep 17 00:00:00 2001
From: Joe Ludwig <joe@valvesoftware.com>
Date: Wed, 26 Jun 2013 15:22:04 -0700
Subject: First version of the SOurce SDK 2013

---
 sp/src/tier1/processor_detect_linux.cpp | 47 +++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 sp/src/tier1/processor_detect_linux.cpp

(limited to 'sp/src/tier1/processor_detect_linux.cpp')

diff --git a/sp/src/tier1/processor_detect_linux.cpp b/sp/src/tier1/processor_detect_linux.cpp
new file mode 100644
index 00000000..8e4f709f
--- /dev/null
+++ b/sp/src/tier1/processor_detect_linux.cpp
@@ -0,0 +1,47 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: linux dependant ASM code for CPU capability detection
+//
+// $Workfile:     $
+// $NoKeywords: $
+//=============================================================================//
+
+#define cpuid(in,a,b,c,d)												\
+	asm("pushl %%ebx\n\t" "cpuid\n\t" "movl %%ebx,%%esi\n\t" "pop %%ebx": "=a" (a), "=S" (b), "=c" (c), "=d" (d) : "a" (in));
+
+bool CheckMMXTechnology(void)
+{
+    unsigned long eax,ebx,edx,unused;
+    cpuid(1,eax,ebx,unused,edx);
+
+    return edx & 0x800000;
+}
+
+bool CheckSSETechnology(void)
+{
+    unsigned long eax,ebx,edx,unused;
+    cpuid(1,eax,ebx,unused,edx);
+
+    return edx & 0x2000000L;
+}
+
+bool CheckSSE2Technology(void)
+{
+    unsigned long eax,ebx,edx,unused;
+    cpuid(1,eax,ebx,unused,edx);
+
+    return edx & 0x04000000;
+}
+
+bool Check3DNowTechnology(void)
+{
+    unsigned long eax, unused;
+    cpuid(0x80000000,eax,unused,unused,unused);
+
+    if ( eax > 0x80000000L )
+    {
+     	cpuid(0x80000001,unused,unused,unused,eax);
+		return ( eax & 1<<31 );
+    }
+    return false;
+}
-- 
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