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Mark atomics as unsupported on thumbv6m #99595

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Merged
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Jul 24, 2022
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Mark atomics as unsupported on thumbv6m #99595

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3 changes: 2 additions & 1 deletion compiler/rustc_target/src/spec/thumbv6m_none_eabi.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -14,8 +14,9 @@ pub fn target() -> Target {
// The ARMv6-M architecture doesn't support unaligned loads/stores so we disable them
// with +strict-align.
features: "+strict-align".into(),
// There are no atomic CAS instructions available in the instruction set of the ARMv6-M
// There are no atomic instructions available in the instruction set of the ARMv6-M
// architecture
max_atomic_width: Some(0),
atomic_cas: false,
..super::thumb_base::opts()
},
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