Added i*_diff and Ord.

[orizi]

Stack:

• Added implementation for i128 mul. #3625
• Added Neg operator for i*. #3624
• Added cast for signed integers. #3623
• Added i*_diff and Ord. #3622 ⬅

⚠️ Part of a stack created by spr. Do not merge manually using the UI - doing so may have unexpected results.

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This change is 

[spapinistarkware]

Reviewed all commit messages.
Reviewable status: 0 of 24 files reviewed, 1 unresolved discussion (waiting on @orizi)

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corelib/src/integer.cairo line 1945 at r1 (raw file):

}

extern fn i8_diff(lhs: i8, rhs: i8) -> Result<u8, u8> implicits(RangeCheck) nopanic;

Doc the return type. Also possible: Add a new enum for the return type and doc there.

[spapinistarkware]

Reviewed 24 of 24 files at r1.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @orizi)

[orizi]

Reviewable status: 18 of 24 files reviewed, 1 unresolved discussion (waiting on @spapinistarkware)

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corelib/src/integer.cairo line 1945 at r1 (raw file):

Previously, spapinistarkware (Shahar Papini) wrote…

Doc the return type. Also possible: Add a new enum for the return type and doc there.

Done.

[spapinistarkware]

Reviewed 6 of 6 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @orizi)