Set max_atomic_width for riscv32*-esp-espidf to 32

matthiaskrgr · Sep 23, 2023 · ecefd4e · ecefd4e
1 parent 3050938
commit ecefd4e
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Showing 2 changed files with 3 additions and 3 deletions.
diff --git a/compiler/rustc_target/src/spec/riscv32imac_esp_espidf.rs b/compiler/rustc_target/src/spec/riscv32imac_esp_espidf.rs
@@ -17,7 +17,7 @@ pub fn target() -> Target {
 
             // As RiscV32IMAC architecture does natively support atomics,
             // automatically enable the support for the Rust STD library.
-            max_atomic_width: Some(64),
+            max_atomic_width: Some(32),
             atomic_cas: true,
 
             features: "+m,+a,+c".into(),

diff --git a/compiler/rustc_target/src/spec/riscv32imc_esp_espidf.rs b/compiler/rustc_target/src/spec/riscv32imc_esp_espidf.rs
@@ -16,11 +16,11 @@ pub fn target() -> Target {
             cpu: "generic-rv32".into(),
 
             // While the RiscV32IMC architecture does not natively support atomics, ESP-IDF does support
-            // the __atomic* and __sync* GCC builtins, so setting `max_atomic_width` to `Some(64)`
+            // the __atomic* and __sync* GCC builtins, so setting `max_atomic_width` to `Some(32)`
             // and `atomic_cas` to `true` will cause the compiler to emit libcalls to these builtins.
             //
             // Support for atomics is necessary for the Rust STD library, which is supported by the ESP-IDF framework.
-            max_atomic_width: Some(64),
+            max_atomic_width: Some(32),
             atomic_cas: true,
 
             features: "+m,+c".into(),