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Rollup merge of #130558 - taiki-e:s390x-atomic-128, r=cuviper

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Support 128-bit atomics on s390x

Since LLVM 18 (c568927f3e), 128-bit atomics are fully supported on s390x. And the current minimum external LLVM version is now 18 (https://github.com/rust-lang/rust/pull/130487).

s390x 128-bit atomic instructions (lpq,stpq,cdsg) has been present since [the First Edition of the Principles of Operation](https://publibfp.dhe.ibm.com/epubs/pdf/dz9zr000.pdf). (LLVM's minimal supported architecture level [is z10 (the Eighth Edition of the PoP)](https://github.com/llvm/llvm-project/blob/llvmorg-19.1.0/llvm/lib/Target/SystemZ/SystemZProcessors.td#L16-L17).)

cc https://github.com/rust-lang/rust/issues/99069

r? `@cuviper`
This commit is contained in:
Matthias Krüger 2024-09-19 20:37:09 +02:00 committed by GitHub
commit f715815bfb
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2 changed files with 2 additions and 2 deletions
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2
compiler/rustc_target/src/spec/targets/s390x_unknown_linux_gnu.rs
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@ -10,7 +10,7 @@ pub(crate) fn target() -> Target {
// ABI. Pass the -vector feature string to LLVM to respect this assumption. On LLVM < 16, we
// also strip v128 from the data_layout below to match the older LLVM's expectation.
base.features = "-vector".into();
base.max_atomic_width = Some(64);
base.max_atomic_width = Some(128);
base.min_global_align = Some(16);
base.stack_probes = StackProbeType::Inline;
base.supported_sanitizers =

2
compiler/rustc_target/src/spec/targets/s390x_unknown_linux_musl.rs
View File

@ -10,7 +10,7 @@ pub(crate) fn target() -> Target {
// ABI. Pass the -vector feature string to LLVM to respect this assumption. On LLVM < 16, we
// also strip v128 from the data_layout below to match the older LLVM's expectation.
base.features = "-vector".into();
base.max_atomic_width = Some(64);
base.max_atomic_width = Some(128);
base.min_global_align = Some(16);
base.static_position_independent_executables = true;
base.stack_probes = StackProbeType::Inline;