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Workaround for __iar_builtin_clrex bug #99

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Dec 4, 2023
Merged

Workaround for __iar_builtin_clrex bug #99

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8 changes: 7 additions & 1 deletion CMSIS/Core/Include/m-profile/cmsis_iccarm_m.h
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Original file line number Diff line number Diff line change
Expand Up @@ -429,7 +429,13 @@ __STATIC_FORCEINLINE void __TZ_set_CONTROL_NS(uint32_t control)
#define __NOP __iar_builtin_no_operation

#define __CLZ __iar_builtin_CLZ
#define __CLREX __iar_builtin_CLREX

/*
* __iar_builtin_CLREX can be reordered w.r.t. STREX during high optimizations.
* As a workaround we use inline assembly and a memory barrier.
* (IAR issue EWARM-11901)
*/
#define __CLREX() (__ASM volatile ("CLREX" ::: "memory"))
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#define __DMB __iar_builtin_DMB
#define __DSB __iar_builtin_DSB
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