Vol. 3C 35-301

MODEL-SPECIFIC REGISTERS (MSRS)

6C0H

1728

MSR_LASTBRANCH_0_TO_IP

3, 4, 6

Unique

Last Branch Record 0 (R/W) 
One of 16 pairs of last branch record registers on 

the last branch record stack (6C0H-6CFH). This 

part of the stack contains pointers to the 

destination instruction for one of the last 16 

branches, exceptions, or interrupts that the 

processor took.
See Section 17.10, “Last Branch, Call Stack, 

Interrupt, and Exception Recording for Processors 

based on Skylake Microarchitecture.”

6C1H

1729

MSR_LASTBRANCH_1_TO_IP

3, 4, 6

Unique

Last Branch Record 1
See description of MSR_LASTBRANCH_0 at 6C0H.

6C2H

1730

MSR_LASTBRANCH_2_TO_IP

3, 4, 6

Unique

Last Branch Record 2
See description of MSR_LASTBRANCH_0 at 6C0H.

6C3H

1731

MSR_LASTBRANCH_3_TO_IP

3, 4, 6

Unique

Last Branch Record 3
See description of MSR_LASTBRANCH_0 at 6C0H.

6C4H

1732

MSR_LASTBRANCH_4_TO_IP

3, 4, 6

Unique

Last Branch Record 4
See description of MSR_LASTBRANCH_0 at 6C0H.

6C5H

1733

MSR_LASTBRANCH_5_TO_IP

3, 4, 6

Unique

Last Branch Record 5
See description of MSR_LASTBRANCH_0 at 6C0H.

6C6H

1734

MSR_LASTBRANCH_6_TO_IP

3, 4, 6

Unique

Last Branch Record 6
See description of MSR_LASTBRANCH_0 at 6C0H.

6C7H

1735

MSR_LASTBRANCH_7_TO_IP

3, 4, 6

Unique

Last Branch Record 7
See description of MSR_LASTBRANCH_0 at 6C0H.

6C8H

1736

MSR_LASTBRANCH_8_TO_IP

3, 4, 6

Unique

Last Branch Record 8
See description of MSR_LASTBRANCH_0 at 6C0H.

6C9H

1737

MSR_LASTBRANCH_9_TO_IP

3, 4, 6

Unique

Last Branch Record 9
See description of MSR_LASTBRANCH_0 at 6C0H.

6CAH

1738

MSR_LASTBRANCH_10_TO_IP

3, 4, 6

Unique

Last Branch Record 10
See description of MSR_LASTBRANCH_0 at 6C0H.

6CBH

1739

MSR_LASTBRANCH_11_TO_IP

3, 4, 6

Unique

Last Branch Record 11
See description of MSR_LASTBRANCH_0 at 6C0H.

6CCH

1740

MSR_LASTBRANCH_12_TO_IP

3, 4, 6

Unique

Last Branch Record 12
See description of MSR_LASTBRANCH_0 at 6C0H.

6CDH

1741

MSR_LASTBRANCH_13_TO_IP

3, 4, 6

Unique

Last Branch Record 13
See description of MSR_LASTBRANCH_0 at 6C0H.

6CEH

1742

MSR_LASTBRANCH_14_TO_IP

3, 4, 6

Unique

Last Branch Record 14
See description of MSR_LASTBRANCH_0 at 6C0H.

6CFH

1743

MSR_LASTBRANCH_15_TO_IP

3, 4, 6

Unique

Last Branch Record 15
See description of MSR_LASTBRANCH_0 at 6C0H.

Table 35-41.  MSRs in the Pentium® 4 and Intel® Xeon® Processors  (Contd.)

Register 

Address

Register Name

Fields and Flags

Model 

Avail-

ability

Shared/

Unique

1

Bit Description

 Hex

Dec