Intel Itanium 9150M, Manual

Page: 376 / 420

Volume 3: Instruction Formats 3:367
X2
4.7.3 Long Branches
Long branches are executed by a B-unit. Opcode C is used for long branch and opcode
D for long call.
The long branch instructions encoded within major opcode C use a 3-bit opcode
extension field in bits 8:6 (btype) to distinguish the branch types as shown in
Table 4-72 .
The long branch instructions have the same opcode hint fields in bit 12 (p), bits 34:33
(wh), and bit 35 (d) as normal IP-relative branches. These are shown in
Table 4-51 on
page 3:351 , Table 4-52 on page 3:352 , and Table 4-54 on page 3:352 .
4.7.3.1 Long Branch
X3
Table 4-71. Move Long 1-bit Opcode Extensions
Opcode
Bits 40:37
v
c
Bit 20
6
0 movl X2
1
40 37 3635 2726 22 21 2019 1312 6 5 0 40 0
6 i imm
9d
imm
5c
i
c
v
c
imm
7b
r
1
qp imm
41
4 1 9 5 1 1 7 7 6 41
Instruction Operands Opcode
Extension
v
c
movl
i
r
1
= imm
64
6 0
Table 4-72. Long Branch Types
Opcode
Bits 40:37
btype
Bits 8:6
C
0 brl.cond X3
1
2
3
4
5
6
7
40 37 36 35 34 3332 1312 11 9 8 6 5 0 40 2 1 0
C i d wh imm
20b
p btype qp imm
39
4 1 1 2 20 1 3 3 6 39 2
Instruction Operands Opcode
Extension
btype p wh d
brl.cond. bwh . ph . dh
e l
target
64
C 0
See Table 4-51
on page 3:351
See Table 4-52
on page 3:352
See Table 4-54
on page 3:352