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Description

This repository provides configurable low-precision floating-point hardware generators for microscaled datapaths. Supported formats include fp4 E2M1, fp6 with E3M2 and E2M3, and fp8 with E5M2 and E4M3. The generator can be used to build a fused processing element (PE) that supports these formats.

The modes below correspond specifically to the PE multiplication modes.

Mode 0

2 2b inputs (input A)
4 2b inputs (input B)
4 4b outputs

Used by:

fp4 x fp4

Mode 1

2 2b inputs (input A)
4 3b inputs (input B)
4 5b outputs

Used by:

fp4 x fp6 (E3M2)
fp4 x fp8 (E5M2)

Mode 2

2 2b inputs (input A)
1 4b inputs (input B)
2 7b outputs

Used by:

fp4 x fp6 (E2M3)
fp4 x fp8 (E4M3)

Mode 3

2 3b inputs (input A)
4 2b inputs (input B)
4 5b outputs

Used by:

fp6 (E3M2) x fp4
fp8 (E5M2) x fp4

Mode 4

2 3b inputs (input A)
4 3b inputs (input B)
4 6b outputs

Used by:

fp6 (E3M2) x fp6 (E3M2)
fp6 (E3M2) x fp8 (E5M2)
fp8 (E5M2) x fp6 (E3M2)
fp8 (E5M2) x fp8 (E5M2)

Mode 5

2 3b inputs (input A)
1 4b inputs (input B)
2 7b outputs

Used by:

fp6 (E3M2) x fp6 (E2M3)
fp6 (E3M2) x fp8 (E4M3)
fp8 (E5M2) x fp6 (E2M3)
fp8 (E5M2) x fp8 (E4M3)

Mode 6

1 4b inputs (input A)
2 2b inputs (input B)
2 7b outputs

Used by:

fp6 (E2M3) x fp4
fp8 (E4M3) x fp4

Mode 7

1 4b inputs (input A)
2 3b inputs (input B)
2 7b outputs

Used by:

fp6 (E2M3) x fp6 (E3M2)
fp6 (E2M3) x fp8 (E5M2)
fp8 (E4M3) x fp6 (E3M2)
fp8 (E4M3) x fp8 (E5M2)

Mode 8

1 4b inputs (input A)
1 4b inputs (input B)
1 8b outputs

Used by:

fp6 (E2M3) x fp6 (E2M3)
fp6 (E2M3) x fp8 (E4M3)
fp8 (E4M3) x fp6 (E2M3)
fp8 (E4M3) x fp8 (E4M3)