Difference between revisions of "Ce"
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== Individual Unit Descriptions == | == Individual Unit Descriptions == | ||
| + | Each of the four clusters in the CE holds 128 registers in its Register File. There are a total of 512 registers. A 9-bit binary number is assigned to each register. Since there are only 512 registers, the highest 2-bits are indicative of the CE cluster/unit to which they belong. | ||
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| + | {| border="1" align="center" cellspacing="0" | ||
| + | |+ Register Numbers and Corresponding Units | ||
| + | |- | ||
| + | !style="background:#efefef;"| Register Number | ||
| + | !style="background:#efefef;"| Highest 2 bits | ||
| + | !style="background:#efefef;"| Compute Engine (CE) | ||
| + | |||
| + | |- align="center" | ||
| + | |0 - 127 || 00 || A Unit RF | ||
| + | |||
| + | |- align="center" | ||
| + | |128 - 255 || 01 || B Unit RF | ||
| + | |||
| + | |- align="center" | ||
| + | |256 - 383 || 10 || C Unit RF | ||
| + | |||
| + | |- align="center" | ||
| + | |384 - 511 || 11 || M Unit RF | ||
| + | |} | ||
| + | |||
{| border="1" width="300pt" cellspacing="0" | {| border="1" width="300pt" cellspacing="0" | ||
|+ AUNIT Module | |+ AUNIT Module | ||
Revision as of 17:42, 30 March 2009
== Compute Engine Design Specifications ==
The COMPUTE ENGINE of SCOORE is responsible for all the calculations of the processor. SCOORE is a clustered architecture, we have FOUR main units which comprise the COMPUTE ENGINE.
- AUNIT is responsible for all the "simple arithmetic operations" of the CPU.(Single Port)
- BUNIT is responsible for branch operations. (Dual Port)
- CUNIT handles all floating point operations. (Single Port)
- MUNIT handles all Load and Store operations. (Dual Port)
A more detailed description of each individual block is given below.
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Individual Unit Descriptions
Each of the four clusters in the CE holds 128 registers in its Register File. There are a total of 512 registers. A 9-bit binary number is assigned to each register. Since there are only 512 registers, the highest 2-bits are indicative of the CE cluster/unit to which they belong.
| Register Number | Highest 2 bits | Compute Engine (CE) |
|---|---|---|
| 0 - 127 | 00 | A Unit RF |
| 128 - 255 | 01 | B Unit RF |
| 256 - 383 | 10 | C Unit RF |
| 384 - 511 | 11 | M Unit RF |
| aunit_stage1 | aunit_stage2 | salu | write_back |
|---|
| bunit_stage1 | bunit_stage2 | balu/salu | write_back |
|---|
| cunit_stage1 | cunit_stage2 | FPU | write_back |
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| munit_stage1 | munit_stage2 | CACHE | write_back |
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--Rigo Dicochea 09:47, 30 March 2009 (PDT)
