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{| class="wikitable" <!-- bad effects at certain Firefox sizings with style="text-align:left" --> align="right" style="margin: 1em auto 1em auto"
|+ SPU function units and footprint
! SPU function
|-
| single precision || 10.0% || single precision FP execution unit || even
|-
| double precision || {{0}}4.4% || double precision FP execution unit || even
|-
| simple fixed || {{0}}3.25% || fixed point execution unit || even
|-
| issue control || {{0}}2.5% || feeds execution units
|-
| forward macro || {{0}}3.75% || feeds execution units
|-
| GPR || {{0}}6.25% || general purpose register file
|-
| permute || {{0}}3.25% || permute execution unit || odd
|-
| branch || {{0}}2.5% || branch execution unit || odd
|-
| channel || {{0}}6.75% || channel interface (three discrete blocks) || odd
|-
| LS0–LS3 || 30.0% || four 64 KiB blocks of local store || odd
|-
| MMU || {{0}}4.75% || memory management unit
|-
| DMA || {{0}}7.5% || direct memory access unit
|-
| BIU || {{0}}9.0% || bus interface unit
|-
| RTB || {{0}}2.5% || array built-in test block (ABIST)
|-
| ATO || {{0}}1.6% || atomic unit for atomic DMA updates
|-
| HB || {{0}}0.5% || obscure
|}
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