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rustc_target: Add sme-b16b16 as an explicit aarch64 target feature

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LLVM 20 split out what used to be called b16b16 and correspond to aarch64
FEAT_SVE_B16B16 into sve-b16b16 and sme-b16b16.
Add sme-b16b16 as an explicit feature and update the codegen accordingly.
This commit is contained in:
Kajetan Puchalski 2024-09-03 13:51:54 +01:00
parent 2900c58a02
commit 335f67b652
5 changed files with 9 additions and 4 deletions
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4
compiler/rustc_target/src/target_features.rs
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@ -191,6 +191,8 @@ const AARCH64_ALLOWED_FEATURES: &[(&str, Stability, ImpliedFeatures)] = &[
("sm4", Stable, &["neon"]),
// FEAT_SME
("sme", Unstable(sym::aarch64_unstable_target_feature), &["bf16"]),
// FEAT_SME_B16B16
("sme-b16b16", Unstable(sym::aarch64_unstable_target_feature), &["bf16", "sme2", "sve-b16b16"]),
// FEAT_SME_F16F16
("sme-f16f16", Unstable(sym::aarch64_unstable_target_feature), &["sme2"]),
// FEAT_SME_F64F64
@ -227,7 +229,7 @@ const AARCH64_ALLOWED_FEATURES: &[(&str, Stability, ImpliedFeatures)] = &[
//
// "For backwards compatibility, Neon and VFP are required in the latest architectures."
("sve", Stable, &["neon"]),
// FEAT_SVE_B16B16 (SVE or SME Instructions)
// FEAT_SVE_B16B16 (SVE or SME Z-targeting instructions)
("sve-b16b16", Unstable(sym::aarch64_unstable_target_feature), &["bf16"]),
// FEAT_SVE2
("sve2", Stable, &["sve"]),