Flag (bit)
|
Feature
|
Description
|
0
|
fpu
|
Floating Point Unit
|
1
|
vme
|
Virtual Mode Extensions
|
2
|
de
|
Debugging Extensions
|
3
|
pse
|
Page Size Extensions
|
4
|
tsc
|
Time Stamp Counter
|
5
|
msr
|
Model-specific registers
|
6
|
pae
|
Physical Address Extensions
|
7
|
mce
|
Machine Check Exceptions
|
8
|
cxchg8
|
Compare and exchange 8-byte
|
9
|
apic
|
On-chip APIC
|
10
|
n/a
|
Reserved
|
11
|
sep
|
Fast System Calls
|
12
|
mtrr
|
Memory Type Range Registers
|
13
|
pge
|
Page Global Enable
|
14
|
mca
|
Machine Check Architecture
|
15
|
cmov
|
Conditional move instruction
|
16
|
pat
|
Page Attribute Table
|
17
|
pse36
|
36-bit Page Size Extensions
|
18
|
psn
|
Processor Serial Number
|
19
|
clfl
|
CLFLUSH, Description pending
|
20
|
n/a
|
Reserved
|
21
|
dtes
|
Debug Trace and EMON Store MSRs
|
22
|
acpi
|
Thermal Control MSR
|
23
|
mmx
|
MMX instruction set
|
24
|
fxsr
|
Fast floating point save/restore
|
25
|
sse
|
SSE (Streaming SIMD Extensions)
|
26
|
sse2
|
SSE2 (Streaming SIMD Extensions - #2)
|
27
|
ss
|
Self Snoop
|
28
|
htt
|
HyperThreading Technology
|
29
|
tm1
|
Thermal Interrupt & Status MSRs.
|
30
|
ia-64
|
IA-64 (64-bit Intel Itanium CPU)
|
31
|
pbe
|
Pending Break Event
|