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Add RISC-V Zicclsm support to MEM_FORCE_MEMORY_ACCESS #4524

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Add RISC-V Zicclsm support to MEM_FORCE_MEMORY_ACCESS #4524

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7 changes: 5 additions & 2 deletions lib/common/mem.h
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Original file line number Diff line number Diff line change
Expand Up @@ -126,10 +126,13 @@ MEM_STATIC size_t MEM_swapST(size_t in);
* Method 1 : Use compiler extension to set unaligned access.
* Method 2 : direct access. This method is portable but violate C standard.
* It can generate buggy code on targets depending on alignment.
* Default : method 1 if supported, else method 0
* Default : method 2 for RISC-V with zicclsm extension (GNUC),
* method 1 for other GNUC environments, else method 0
*/
#ifndef MEM_FORCE_MEMORY_ACCESS /* can be defined externally, on command line for example */
# ifdef __GNUC__
# if defined(__GNUC__) && (defined(__riscv) && defined(__riscv_zicclsm))
# define MEM_FORCE_MEMORY_ACCESS 2
# elif defined(__GNUC__)
# define MEM_FORCE_MEMORY_ACCESS 1
# endif
#endif
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