Kotlin SIMD

Exposes SSE, SSE2, SSE3, SSSE3, SSE4.1, and SSE4.2 compiler intrinsics to Kotlin/Native as functions.

SSE Support can be checked by using the boolean constants defined by the library (simply called SSE, SSE2, etc). This allows changing implementation at runtime based on hardware SSE support:

fun round(x: Vector128): Vector128 = when {
    SSE4_1 -> sse4_1_round_ps(x, SSE4_1_FROUND_NEARBYINT)
    else -> {
        vectorOf(
            round(x.getFloatAt(0)),
            round(x.getFloatAt(1)),
            round(x.getFloatAt(2)),
            round(x.getFloatAt(3)),
        )
    }
}

In order to use the SIMD functions from common source sets like nativeMain or similar, cinterop commonization needs to be enabled in gradle.properties:

kotlin.mpp.enableCinteropCommonization=true

This is only required if using functions from the platform.simd package directly.

Starting with 2.0.x, library release lines follow the Kotlin compiler's major/minor version (2.0.x is built with Kotlin 2.0.x). Library patch numbers are independent of Kotlin's patch numbers.

Moving between major/minor release lines is considered a breaking change and may require upgrading your Kotlin compiler. Cross-version compatibility of the published cinterop KLIBs is not guaranteed. This is Kotlin-aligned versioning, not strict SemVer.

Version compatibility is based on the Kotlin documentation: https://kotlinlang.org/docs/multiplatform/multiplatform-compatibility-guide.html#version-compatibility