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phanerozoic/
threshold-min2

Name: threshold-min2
Rating: 2.5 (18 reviews)

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threshold-min2

Minimum of two 2-bit unsigned integers.

Function

min2(a, b) = min(a, b) where a, b are 2-bit unsigned integers (0-3)

Inputs: a1, a0, b1, b0 (MSB first) Outputs: m1, m0 = binary representation of min(a, b)

Truth Table

a	b	min
0	0	0
0	1	0
0	2	0
0	3	0
1	0	0
1	1	1
1	2	1
1	3	1
2	0	0
2	1	1
2	2	2
2	3	2
3	0	0
3	1	1
3	2	2
3	3	3

Architecture

7-layer circuit:

Layer 1: Bit comparisons and passthrough (10 neurons)
Layer 2: Equality detection (9 neurons)
Layer 3: Partial comparison (8 neurons)
Layer 4: Full a > b and a == b (6 neurons)
Layer 5: a <= b computation (5 neurons)
Layer 6: MUX selection (4 neurons)
Layer 7: Final OR (2 neurons)

Parameters


Inputs	4
Outputs	2
Neurons	44
Layers	7
Parameters	186
Magnitude	95

Usage

python

from safetensors.torch import load_file
import torch

w = load_file('model.safetensors')

# Use model.py for full implementation
from model import min2, load_model
w = load_model()
m1, m0 = min2(1, 0, 0, 1, w)  # min(2, 1) = 1
print(2*m1 + m0)  # 1

License

MIT

phanerozoic/threshold-min2