FA-98699 / Model quantization arithmetic / Member archive

Quantization: Input zero point correction skips right-shift rescaling · case 04

Centered accumulator values are left at the wrong scale.

Member previewVariant 4 · 3 implementations · 6 checks per implementation

Case contract

Subtract integer input zero point before applying multiplier and right shift, rounding once to nearest-even. Inputs follow this explicit integer toy contract; ties use Python round-to-even where rounding is required.

Why this case matters

This deterministic model isolates one quantization arithmetic contract from tensor storage and runtime kernels.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
offset then scale	`[8]`	`[4]`	Failed

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