Difference between revisions of "Ce"
From Vlsiwiki
| Line 90: | Line 90: | ||
{| border="1" width="300pt" cellspacing="0" | {| border="1" width="300pt" cellspacing="0" | ||
|+ CUNIT Module | |+ CUNIT Module | ||
| − | |||
| − | |||
|- style="height:150px; vertical-align:top" | |- style="height:150px; vertical-align:top" | ||
!cunit_stage1 | !cunit_stage1 | ||
| + | -local/ext/imm src sel. logic | ||
| + | -reset/busy logic | ||
!cunit_stage2 | !cunit_stage2 | ||
!FPU | !FPU | ||
Revision as of 18:10, 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.
|
|
|
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
-local/ext/imm src sel. logic -reset/busy logic |
aunit_stage2 | salu | write_back
Reg. File |
|---|
bunit_stage1
-local/ext/imm src sel. logic -reset/busy logic |
bunit_stage2 | balu/salu | write_back
Reg. File |
|---|
cunit_stage1
-local/ext/imm src sel. logic -reset/busy logic |
cunit_stage2 | FPU | write_back
Reg. File |
|---|
munit_stage1
-local/ext/imm src sel. logic -reset/busy logic |
munit_stage2 | CACHE | write_back
Reg. File |
|---|
--Rigo Dicochea 09:47, 30 March 2009 (PDT)
