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Godson-2D - Loongson
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Godson-2D
General Info
DesignerLoongson
ManufacturerSTMicroelectronics
Model Number2D
MarketDesktop
IntroductionNovember, 2004 (announced)
2006 (launched)
General Specs
FamilyGodson 2
SeriesGodson 2
Frequency700 MHz
Microarchitecture
ISAMIPS64 (MIPS)
MicroarchitectureGS464
Core NameGS464
Process130 nm
TechnologyCMOS
Word Size64 bit
Cores1
Threads1
Multiprocessing
Max SMP1-Way (Uniprocessor)
Electrical
Power dissipation5 W

Godson-2D (龙芯2D) is a 64-bit MIPS performance processor developed by ICT and later Loongson for desktop computers. Announced in late 2004, the Godson-2D operates at up to 700 MHz consuming 3-5W. This chip was manufactured on STMicroelectronics' 0.13 µm process. This chip reached tapeout on September 12, 2004.

The Godson-2D was initially announced on November of 2004 with plans to be launched in February of 2005. It was later postponed to April of 2005. During the 2006 International Innovation Conference, it was announced that the Godson-2D was complete and would begin shipping starting the summer of 2006. It's unknown if the chip was ever made it to market. But even if the chip did get released it was likely discontinued and superseded shortly after due to the release of the 2E which was architecturally very similar but operated at higher frequencies.

Loongson has claimed the Godson-2D has reached the performance level of 1.3-1.4 GHz PIV based on their SPECint2000 scores.

Cache[edit]

Main article: GS464 § Cache

[Edit/Modify Cache Info]

hierarchy icon.svg
Cache Organization
Cache is a hardware component containing a relatively small and extremely fast memory designed to speed up the performance of a CPU by preparing ahead of time the data it needs to read from a relatively slower medium such as main memory.

The organization and amount of cache can have a large impact on the performance, power consumption, die size, and consequently cost of the IC.

Cache is specified by its size, number of sets, associativity, block size, sub-block size, and fetch and write-back policies.

Note: All units are in kibibytes and mebibytes.
L1$128 KiB
0.125 MiB
131,072 B
1.220703e-4 GiB
L1I$64 KiB
0.0625 MiB
65,536 B
6.103516e-5 GiB
1x64 KiB4-way set associative 
L1D$64 KiB
0.0625 MiB
65,536 B
6.103516e-5 GiB
1x64 KiB4-way set associative 
Facts about "Godson-2D - Loongson"
base frequency700 MHz (0.7 GHz, 700,000 kHz) +
core count1 +
core nameGS464 +
designerLoongson +
familyGodson 2 +
first announcedNovember 2004 +
first launched2006 +
full page nameloongson/godson 2/2d +
instance ofmicroprocessor +
isaMIPS64 +
isa familyMIPS +
l1$ size0.125 MiB (128 KiB, 131,072 B, 1.220703e-4 GiB) +
l1d$ description4-way set associative +
l1d$ size0.0625 MiB (64 KiB, 65,536 B, 6.103516e-5 GiB) +
l1i$ description4-way set associative +
l1i$ size0.0625 MiB (64 KiB, 65,536 B, 6.103516e-5 GiB) +
ldate2006 +
manufacturerSTMicroelectronics +
market segmentDesktop +
max cpu count1 +
microarchitectureGS464 +
model number2D +
nameGodson-2D +
power dissipation5 W (5,000 mW, 0.00671 hp, 0.005 kW) +
process130 nm (0.13 μm, 1.3e-4 mm) +
seriesGodson 2 +
smp max ways1 +
technologyCMOS +
thread count1 +
word size64 bit (8 octets, 16 nibbles) +