From a1956bc83b2abd5813faa1f7729866d238de91a4 Mon Sep 17 00:00:00 2001
From: David Anderson <dvander@alliedmods.net>
Date: Sat, 18 Mar 2006 08:56:58 +0000
Subject: [PATCH] added cpuid helper func

---
 amxmodx/helpers-x86.asm        | 51 ++++++++++++++++++++++++++++++++++
 amxmodx/msvc/amxmodx_mm.vcproj | 10 +++++++
 amxmodx/optimizer.cpp          |  7 ++++-
 amxmodx/optimizer.h            |  1 +
 4 files changed, 68 insertions(+), 1 deletion(-)
 create mode 100644 amxmodx/helpers-x86.asm

diff --git a/amxmodx/helpers-x86.asm b/amxmodx/helpers-x86.asm
new file mode 100644
index 00000000..3039cf2c
--- /dev/null
+++ b/amxmodx/helpers-x86.asm
@@ -0,0 +1,51 @@
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+; (C)2006 by David "BAILOPAN" Anderson			 ;
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+
+;;Licensed under the GNU General Public License, version 2
+;;This is a portion of AMX Mod X 
+;; and is maintained by the AMX Mod X development team.
+
+section .text
+
+global amxx_CpuSupport, _amxx_CpuSupport
+
+amxx_CpuSupport:
+_amxx_CpuSupport:
+	push	ebp
+	mov		ebp, esp
+	
+	push	ebx
+	
+	mov		eax, 0
+	cpuid
+	cmp		eax, 1
+	jl		.fail
+	
+	mov		eax, 1
+	cpuid
+	;check if family == 5 or 4
+	and		eax, 0780h	;family mask
+	shr		eax, 7		;family shift
+	cmp		eax, 5
+	je		.fail
+	cmp		eax, 4
+	je		.fail
+	;check if CMOV exists
+	shr		edx, 15
+	and		edx, 1
+	cmp		edx, 0
+	je		.fail
+	
+	mov		eax, 1
+	jmp		.end
+
+.fail:
+	xor		eax, eax
+	
+.end
+	
+	pop		ebx
+
+	pop		ebp
+	ret
diff --git a/amxmodx/msvc/amxmodx_mm.vcproj b/amxmodx/msvc/amxmodx_mm.vcproj
index 0ebc4558..6ffb3720 100755
--- a/amxmodx/msvc/amxmodx_mm.vcproj
+++ b/amxmodx/msvc/amxmodx_mm.vcproj
@@ -1084,12 +1084,22 @@
 			<File
 				RelativePath="..\amxjitsn.asm">
 			</File>
+			<File
+				RelativePath="..\helpers-x86.asm">
+			</File>
 			<File
 				RelativePath="..\natives-amd64.asm">
 			</File>
 			<File
 				RelativePath="..\natives-x86.asm">
 			</File>
+			<Filter
+				Name="Builds"
+				Filter="">
+				<File
+					RelativePath="..\Jit\helpers-x86.obj">
+				</File>
+			</Filter>
 		</Filter>
 		<Filter
 			Name="SDK"
diff --git a/amxmodx/optimizer.cpp b/amxmodx/optimizer.cpp
index 0a679025..4e5b1f48 100644
--- a/amxmodx/optimizer.cpp
+++ b/amxmodx/optimizer.cpp
@@ -99,7 +99,12 @@ void _Setup_Optimizer_Stage2(AMX *amx, cell *oplist, cell *cip)
 	}
 	if (g_opt_level & 2)
 	{
-		FIND_NATIVE("floatcmp", N_Float_Cmp);
+		if (amxx_CpuSupport())
+		{
+			FIND_NATIVE("floatcmp", N_Float_Cmp);
+		} else {
+			g_opt_level &= ~(2);
+		}
 	}
 	//we don't do these yet because of radix stuff >:\
 	//FIND_NATIVE("floatsin", N_Float_Sin);
diff --git a/amxmodx/optimizer.h b/amxmodx/optimizer.h
index 76690ffd..853d5a04 100644
--- a/amxmodx/optimizer.h
+++ b/amxmodx/optimizer.h
@@ -22,6 +22,7 @@ struct optimizer_s
 };
 
 void SetupOptimizer(AMX *amx);
+extern "C" int amxx_CpuSupport();
 
 extern int g_opt_level;