Softplus kernel

[andrewdalpino]

SoftPlus, erf(), rsqrt(), sinh(), and cosh()

[Copilot]

🟡 Changes recommended

The release version mismatch and missing Special-surface test remain unresolved, along with documented follow-up corrections.

13 open findings

• Update config.json to version 4.1.0 · New
• Move softplus and sigmoid entries to Special · New
• Move softplus and sigmoid entries to Special · New
• Add missing space before the erf API link · New
• Fix singular grammar in the overview sentence · New
• Document sigmoid and softplus in the Special reference · New
• Update inherited-method table for Special methods · New
• Move sigmoid and softplus documentation to Special · New
• Add spacing in invalid-arity compiler errors · New
• Add spacing in invalid-arity compiler errors · New
• Add spacing in invalid-arity compiler errors · New
• Add spacing in invalid-arity compiler errors · New
• Add spacing in invalid-arity compiler errors · New

What changed in this PR

Adds rsqrt, stable softplus, erf, sinh, and cosh tensor operations across native kernels, APIs, optimizers, tests, benchmarks, and documentation.

Changes:

• Adds Vector, Matrix, and ColumnVector operations.
• Updates Zephir interfaces, generated bindings, and native C kernels.
• Adds tests, documentation, changelog, and benchmark coverage.

File	Summary
tests/​VectorTest.php	Tests new vector operations; add coverage confirming the Special interface surface.
tests/​SettingsTest.php	Tests rsqrt dispatch.
tests/​MatrixTest.php	Tests new matrix operations.
tests/​ColumnVectorTest.php	Tests result types and values.
tensor/​vector.zep	Adds vector APIs.
tensor/​unary.zep	Adds rsqrt and moves sigmoid out of Unary.
tensor/​trigonometric.zep	Adds sinh and cosh.
tensor/​special.zep	Defines sigmoid, softplus, and erf.
tensor/​matrix.zep	Adds matrix APIs.
optimizers/​TensorSoftplusOptimizer.php	Adds softplus optimizer; fix spacing in arity diagnostics.
optimizers/​TensorSinhOptimizer.php	Adds sinh optimizer; fix spacing in arity diagnostics.
optimizers/​TensorRsqrtOptimizer.php	Adds rsqrt optimizer; fix spacing in arity diagnostics.
optimizers/​TensorErfOptimizer.php	Adds erf optimizer; fix spacing in arity diagnostics.
optimizers/​TensorCoshOptimizer.php	Adds cosh optimizer; fix spacing in arity diagnostics.
ext/​tensor/​vector.zep.h	Generated vector declarations.
ext/​tensor/​vector.zep.c	Generated vector implementations.
ext/​tensor/​unary.zep.h	Generated Unary declarations.
ext/​tensor/​unary.zep.c	Generated Unary implementations.
ext/​tensor/​trigonometric.zep.h	Generated trigonometric declarations.
ext/​tensor/​trigonometric.zep.c	Generated trigonometric implementations.
ext/​tensor/​special.zep.h	Generated Special declarations.
ext/​tensor/​special.zep.c	Generated Special implementations.
ext/​tensor/​matrix.zep.h	Generated Matrix declarations.
ext/​tensor/​matrix.zep.c	Generated Matrix implementations.
ext/​include/​unary.h	Declares native kernels.
ext/​include/​unary.c	Implements and dispatches native kernels.
docs/​Vector.md	Documents vector methods; update Special method categorization.
docs/​Matrix.md	Documents matrix methods; update Special method categorization.
docs/​interfaces/​unary.md	Documents Unary methods; move sigmoid and softplus entries to Special.
docs/​interfaces/​trigonometric.md	Documents hyperbolic operations.
docs/​interfaces/​tensor.md	Lists inherited methods; update interface grouping.
docs/​interfaces/​special.md	Documents Special operations; add missing method sections and correct overview wording.
docs/​index.md	Updates the interface index; fix missing spacing in the erf entry.
CHANGELOG.md	Records the 4.1.0 release; align the build extension version.
benchmarks/​Unary/​SoftplusMatrixBench.php	Benchmarks softplus; move to the Special benchmark area.

Files not reviewed (10)

• ext/tensor/matrix.zep.c: Generated file
• ext/tensor/matrix.zep.h: Generated file
• ext/tensor/special.zep.c: Generated file
• ext/tensor/special.zep.h: Generated file
• ext/tensor/trigonometric.zep.c: Generated file
• ext/tensor/trigonometric.zep.h: Generated file
• ext/tensor/unary.zep.c: Generated file
• ext/tensor/unary.zep.h: Generated file
• ext/tensor/vector.zep.c: Generated file
• ext/tensor/vector.zep.h: Generated file

🧠 Review effort: Lite

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