Intrinsic support for `VectorMask.laneIsSet` with a **variable** input index was introduced in PR #14200, but was inadvertently broken by PR #25673. This PR restores the intrinsic functionality and adds some JTReg tests.
Benchmarks on Nvidia Grace machine with 128-bit SVE: Benchmark Unit Before Score Error After Score Error Uplift microMaskLaneIsSetByte128_var ops/ms 21702.14415 91.902159 103472.9391 36.057447 4.767867 microMaskLaneIsSetByte64_var ops/ms 21468.51868 107.94177 103365.6561 69.47736 4.814754 microMaskLaneIsSetDouble128_var ops/ms 77489.32791 153.242699 413499.4127 311.854079 5.336211 microMaskLaneIsSetFloat128_var ops/ms 41034.95204 399.421823 206840.0988 74.702234 5.040583 microMaskLaneIsSetFloat64_var ops/ms 77607.40268 175.938921 413745.3001 149.716794 5.33126 microMaskLaneIsSetInt128_var ops/ms 41452.48893 76.143208 206845.9754 59.371129 4.989953 microMaskLaneIsSetInt64_var ops/ms 77726.2542 173.180518 413427.8838 363.575023 5.319024 microMaskLaneIsSetLong128_var ops/ms 77646.11218 177.496587 413403.4404 236.609314 5.3242 microMaskLaneIsSetShort128_var ops/ms 21374.93265 48.13101 103417.4618 34.827021 4.838259 microMaskLaneIsSetShort64_var ops/ms 41066.19395 353.320621 206801.109 106.408938 5.035799 Benchmarks on Intel 6444y machine with 512-bit avx3: Benchmark Unit Before Score Error After Score Error Uplift microMaskLaneIsSetByte128_var ops/ms 57658.45497 240.209309 211643.8406 29.214532 3.670647 microMaskLaneIsSetByte256_var ops/ms 57451.68169 116.994128 211609.4652 160.48513 3.683259 microMaskLaneIsSetByte512_var ops/ms 57530.22411 311.63868 199802.8084 408.144015 3.473005 microMaskLaneIsSetByte64_var ops/ms 57642.2672 161.406221 205252.4464 196.86852 3.560797 microMaskLaneIsSetDouble256_var ops/ms 114401.3789 231.797375 361400.344 565.593984 3.159055 microMaskLaneIsSetDouble512_var ops/ms 57379.27882 159.699503 211476.1138 136.980026 3.685583 microMaskLaneIsSetFloat128_var ops/ms 113943.9512 141.062663 360855.3915 494.471996 3.166955 microMaskLaneIsSetFloat256_var ops/ms 57682.78182 138.142053 211659.5098 30.167972 3.66937 microMaskLaneIsSetFloat512_var ops/ms 57617.66405 301.748599 211246.8588 597.18949 3.666355 microMaskLaneIsSetInt128_var ops/ms 113914.5062 118.681382 360856.4465 555.097397 3.167783 microMaskLaneIsSetInt256_var ops/ms 57681.79883 112.391639 211555.6742 217.556981 3.667633 microMaskLaneIsSetInt512_var ops/ms 57350.20346 206.146723 211657.7207 68.461571 3.690618 microMaskLaneIsSetLong256_var ops/ms 113838.3822 415.784529 360782.0645 710.076899 3.169247 microMaskLaneIsSetLong512_var ops/ms 57314.02695 190.1762 211690.8492 26.47233 3.693526 microMaskLaneIsSetShort128_var ops/ms 57675.58965 65.940976 211549.9551 276.57545 3.667928 microMaskLaneIsSetShort256_var ops/ms 57628.8642 91.957833 211694.0864 16.559412 3.673403 microMaskLaneIsSetShort512_var ops/ms 57845.35211 160.537421 211358.872 660.777147 3.65386 microMaskLaneIsSetShort64_var ops/ms 113848.8846 222.787418 360294.6295 491.425656 3.164674 ------------- Commit messages: - 8366588: VectorAPI: Re-intrinsify VectorMask.laneIsSet where the input index is a variable Changes: https://git.openjdk.org/jdk/pull/27113/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27113&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8366588 Stats: 170 lines in 4 files changed: 168 ins; 0 del; 2 mod Patch: https://git.openjdk.org/jdk/pull/27113.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/27113/head:pull/27113 PR: https://git.openjdk.org/jdk/pull/27113
