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Volume 3: Instruction Formats
3:365
4.6.9
Miscellaneous F-Unit Instructions
4.6.9.1
Break (F-Unit)
4.6.9.2
Nop/Hint (F-Unit)
F-unit nop and hint instructions are encoded within major opcode 0 using a 3-bit
opcode extension field in bits 35:33 (x
3
), a 6-bit opcode extension field in bits 32:27
(x
6
), and a 1-bit opcode extension field in bit 26 (y), as shown in
4.7
X-Unit Instruction Encodings
The X-unit instructions occupy two instruction slots, L+X. The major opcode, opcode
extensions and hints, qp, and small immediate fields occupy the X instruction slot. For
movl, break.x, and nop.x, the imm
41
field occupies the L instruction slot. For brl, the
imm
39
field and a 2-bit Ignored field occupy the L instruction slot.
4.7.1
Miscellaneous X-Unit Instructions
The miscellaneous X-unit instructions are encoded in major opcode 0 using a 3-bit
opcode extension field (x
3
) in bits 35:33 and a 6-bit opcode extension field (x
6
) in bits
32:27.
shows the 3-bit assignments and
summarizes the 6-bit
assignments. These instructions are executed by an I-unit.
40
37 36 35 34 33 32
27 26 25
6 5
0
i
x
x
6
imm
20a
qp
4
1
2
1
6
1
20
6
Instruction
Operands
Opcode
Extension
x
x
6
break.f
imm
21
0
00
Table 4-68.
Misc F-Unit 1-bit Opcode Extensions
Opcode
Bits 40:37
x
Bit :33
x
6
Bits 32:27
y
Bit 26
0
01
0
nop.f
1
hint.f
40
37 36 35 34 33 32
27 26 25
6 5
0
i
x
x
6
y
imm
20a
qp
4
1
2
1
6
1
20
6
Instruction
Operands
Opcode
Extension
x
x
6
y
nop.f
imm
21
0
01
0
hint.f
1
Содержание Itanium 9150M
Страница 1: ......
Страница 209: ...3 200 Volume 3 Instruction Reference padd Interruptions Illegal Operation fault...
Страница 301: ...3 292 Volume 3 Pseudo Code Functions Intel Itanium Architecture Software Developer s Manual Rev 2 3...
Страница 405: ...3 396 Volume 3 Resource and Dependency Semantics...
Страница 406: ...3 397 Intel Itanium Architecture Software Developer s Manual Rev 2 3 Index...
Страница 407: ...3 398 Intel Itanium Architecture Software Developer s Manual Rev 2 3...
Страница 419: ...INDEX Index 12 Index for Volumes 1 2 3 and 4...
Страница 420: ......