4.
Pipelining
Rev.1.00 Jan. 10, 2008 Page 79 of 1658
REJ09B0261-0100
4.3
Issue Rates and Execution Cycles
Instruction execution cycles are summarized in table 4.4. Instruction Group in the table 4.4
corresponds to the category in the table 4.2. Penalty cycles due to a pipeline stall are not
considered in the issue rates and execution cycles in this section.
I1
I2
I3
ID
S1
S2
S3
WB
E2S2
E3S3
WB
E1S1
I1
I2
I3
ID
S1
S2
S3
WB
MS
S2
S3
WB
S1
ID
ID
ID
(I1)
(ID)
(I2)
(I3)
M3
M2
(I1)
(I3)
(ID)
(I2)
I1
I2
I3
ID
S1
S2
S3
WB
E2S2
E3S3
WB
E1S1
ID
ID
I1
I2
I3
ID
S1
S2
S3
WB
MS
S2
S3
WB
S1
ID
M3
M2
FE1
FE2
FE3
FE4
FE5
FE6
FE1 FE2 FE3 FE4 FE5 FE6
FS
FE1
FE2
FE3
FE4
FE5
FE6
FS
FE1
FE2
FE3
FE4
FE5
FE6
FS
I1
I2
I3
ID
I1
I2
I3
ID
FS
FE3 FE4 FE5 FE6
FS
1. Issue Rate
Issue rate: 3
Issue rates indicates the issue period between one instruction and next instruction.
E.g. AND.B instruction
Next instruction
Issue rate: 2
E.g. MAC.W instruction
Execution cycles indicates the cycle counts an instruction occupied the pipeline based on the next rules.
CPU instruction
E.g. AND.B instruction
Execution Cycles: 3
E.g. MAC.W instruction
Execution Cycles: 4
2. Execution Cycles
Next instruction
FPU instruction
E.g. FMUL instruction
Execution Cycles: 14
E.g. FDIV instruction
Execution Cycles: 3
Divider occupation cycle
Содержание SH7781
Страница 4: ...Rev 1 00 Jan 10 2008 Page iv of xxx REJ09B0261 0100 ...
Страница 74: ...2 Programming Model Rev 1 00 Jan 10 2008 Page 44 of 1658 REJ09B0261 0100 ...
Страница 272: ...8 Caches Rev 1 00 Jan 10 2008 Page 242 of 1658 REJ09B0261 0100 ...
Страница 376: ...10 Interrupt Controller INTC Rev 1 00 Jan 10 2008 Page 346 of 1658 REJ09B0261 0100 ...
Страница 694: ...13 PCI Controller PCIC Rev 1 00 Jan 10 2008 Page 664 of 1658 REJ09B0261 0100 ...
Страница 762: ...14 Direct Memory Access Controller DMAC Rev 1 00 Jan 10 2008 Page 732 of 1658 REJ09B0261 0100 ...
Страница 788: ...15 Clock Pulse Generator CPG Rev 1 00 Jan 10 2008 Page 758 of 1658 REJ09B0261 0100 ...
Страница 828: ...17 Power Down Mode Rev 1 00 Jan 10 2008 Page 798 of 1658 REJ09B0261 0100 ...
Страница 846: ...18 Timer Unit TMU Rev 1 00 Jan 10 2008 Page 816 of 1658 REJ09B0261 0100 ...
Страница 1292: ...24 Multimedia Card Interface MMCIF Rev 1 00 Jan 10 2008 Page 1262 of 1658 REJ09B0261 0100 ...
Страница 1326: ...25 Audio Codec Interface HAC Rev 1 00 Jan 10 2008 Page 1296 of 1658 REJ09B0261 0100 ...
Страница 1482: ...28 General Purpose I O Ports GPIO Rev 1 00 Jan 10 2008 Page 1452 of 1658 REJ09B0261 0100 ...
Страница 1538: ...30 User Debugging Interface H UDI Rev 1 00 Jan 10 2008 Page 1508 of 1658 REJ09B0261 0100 ...
Страница 1688: ...Appendix Rev 1 00 Jan 10 2008 Page 1658 of 1658 REJ09B0261 0100 ...
Страница 1691: ......
Страница 1692: ...SH7785 Hardware Manual ...