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29 lines
910 B
Python
29 lines
910 B
Python
# PTOS: LAYER=INFRA / DOMAIN=AUTOMATION / CONDITION=ALPHA
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"""
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Q16_16 fixed-point arithmetic for deterministic compute across all substrates.
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All thresholds and metric values are stored as Q16_16 integers.
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One = 0x00010000 = 65536. Float is forbidden in compute paths.
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"""
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from __future__ import annotations
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Q16_ONE: int = 0x00010000
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Q16_HALF: int = 0x00008000
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def to_q16(value: float) -> int:
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"""Convert a float to Q16_16. Only allowed at the external boundary."""
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return int(round(value * Q16_ONE))
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def from_q16(value: int) -> float:
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"""Convert Q16_16 back to float. Only for display, never in compute."""
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return value / Q16_ONE
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def ratio_q16(numerator: float, denominator: float) -> int:
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"""Compute Q16_16 ratio of two floats, clamped to [0, 1]."""
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if denominator == 0:
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return 0
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r = numerator / denominator
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r = max(0.0, min(1.0, r))
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return int(r * Q16_ONE)
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