MFamd64: More CPUID feature flags: SSE4, X2APIC, POPCNT, DTES64, and 1GB

large pages.

MFC after:	1 month

sys/i386/i386/identcpu.c

@@ -719,7 +719,7 @@ printcpuinfo(void)
 				"\020"
 				"\001SSE3"	/* SSE3 */
 				"\002<b1>"
-				"\003RSVD2"	/* "Reserved" bit 2 */
+				"\003DTES64"	/* 64-bit Debug Trace */
 				"\004MON"	/* MONITOR/MWAIT Instructions */
 				"\005DS_CPL"	/* CPL Qualified Debug Store */
 				"\006VMX"	/* Virtual Machine Extensions */
@@ -736,11 +736,11 @@ printcpuinfo(void)
 				"\021<b16>"
 				"\022<b17>"
 				"\023DCA"	/* Direct Cache Access */
-				"\024<b19>"
-				"\025<b20>"
-				"\026<b21>"
+				"\024SSE4.1"
+				"\025SSE4.2"
+				"\026x2APIC"	/* xAPIC Extensions */
 				"\027<b22>"
-				"\030<b23>"
+				"\030POPCNT"
 				"\031<b24>"
 				"\032<b25>"
 				"\033<b26>"
@@ -790,7 +790,7 @@ printcpuinfo(void)
 				"\030<s23>"	/* Same */
 				"\031<s24>"	/* Same */
 				"\032FFXSR"	/* Fast FXSAVE/FXRSTOR */
-				"\033<b26>"	/* Undefined */
+				"\033Page1GB"	/* 1-GB large page support */
 				"\034RDTSCP"	/* RDTSCP */
 				"\035<b28>"	/* Undefined */
 				"\036LM"	/* 64 bit long mode */

sys/i386/include/specialreg.h

@@ -110,6 +110,7 @@
 #define	CPUID_PBE	0x80000000
 
 #define	CPUID2_SSE3	0x00000001
+#define	CPUID2_DTES64	0x00000004
 #define	CPUID2_MON	0x00000008
 #define	CPUID2_DS_CPL	0x00000010
 #define	CPUID2_VMX	0x00000020
@@ -122,6 +123,10 @@
 #define	CPUID2_XTPR	0x00004000
 #define	CPUID2_PDCM	0x00008000
 #define	CPUID2_DCA	0x00040000
+#define	CPUID2_SSE41	0x00080000
+#define	CPUID2_SSE42	0x00100000
+#define	CPUID2_X2APIC	0x00200000
+#define	CPUID2_POPCNT	0x00800000
 
 /*
  * Important bits in the AMD extended cpuid flags
@@ -131,6 +136,7 @@
 #define	AMDID_NX	0x00100000
 #define	AMDID_EXT_MMX	0x00400000
 #define	AMDID_FFXSR	0x01000000
+#define	AMDID_PAGE1GB	0x04000000
 #define	AMDID_RDTSCP	0x08000000
 #define	AMDID_LM	0x20000000
 #define	AMDID_EXT_3DNOW	0x40000000