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Add native left-upper ldiv! and right-lower rdiv! kernels #41

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Merged
ChrisRackauckas merged 4 commits into from
Aug 8, 2026
Merged

Add native left-upper ldiv! and right-lower rdiv! kernels #41

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a3323a7
Add native left-upper ldiv! and right-lower rdiv! kernels
ChrisRackauckas Aug 7, 2026
552f982
Fix remainder guard message spelling in new kernels
ChrisRackauckas Aug 7, 2026
252252b
Bump version to 0.2.2
ChrisRackauckas Aug 7, 2026
6e60085
Constrain new methods to strided inputs and validate dimensions
ChrisRackauckas Aug 8, 2026
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2 changes: 1 addition & 1 deletion Project.toml
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
name = "TriangularSolve"
uuid = "d5829a12-d9aa-46ab-831f-fb7c9ab06edf"
authors = ["chriselrod <elrodc@gmail.com> and contributors"]
version = "0.2.1"
version = "0.2.2"

[deps]
CloseOpenIntervals = "fb6a15b2-703c-40df-9091-08a04967cfa9"
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14 changes: 13 additions & 1 deletion README.md
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Expand Up @@ -6,7 +6,19 @@
[![Coverage](https://codecov.io/gh/JuliaSIMD/TriangularSolve.jl/branch/master/graph/badge.svg)](https://codecov.io/gh/JuliaSIMD/TriangularSolve.jl)


Performs some triangular solves. For example:
Performs triangular solves for `Float32`/`Float64` matrices with at least two
right-hand sides, covering all four side/triangle combinations (plus the
unit-diagonal variants of each):

- `rdiv!(A, ::UpperTriangular)` / `rdiv!(A, ::UnitUpperTriangular)`: `A ← A / U`
- `rdiv!(A, ::LowerTriangular)` / `rdiv!(A, ::UnitLowerTriangular)`: `A ← A / L`
- `ldiv!(::LowerTriangular, A)` / `ldiv!(::UnitLowerTriangular, A)`: `A ← L \ A`
- `ldiv!(::UpperTriangular, A)` / `ldiv!(::UnitUpperTriangular, A)`: `A ← U \ A`

Three-argument out-of-place forms (`rdiv!(C, A, U)`, `ldiv!(C, U, A)`) are also
provided, and each method takes a trailing `Val(true)`/`Val(false)` argument
controlling multithreading. Other element types and vector right-hand sides
fall back to `LinearAlgebra`. For example:
```julia
julia> using TriangularSolve, LinearAlgebra, MKL;

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