GCC 6
GCC 6
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6.59.3. Altera Nios II Built-in Functions

6.59.3 Altera Nios II Built-in Functions

These built-in functions are available for the Altera Nios II family of processors.

The following built-in functions are always available. They all generate the machine instruction that is part of the name. 

int __builtin_ldbio (volatile const void *)
int __builtin_ldbuio (volatile const void *)
int __builtin_ldhio (volatile const void *)
int __builtin_ldhuio (volatile const void *)
int __builtin_ldwio (volatile const void *)
void __builtin_stbio (volatile void *, int)
void __builtin_sthio (volatile void *, int)
void __builtin_stwio (volatile void *, int)
void __builtin_sync (void)
int __builtin_rdctl (int)
int __builtin_rdprs (int, int)
void __builtin_wrctl (int, int)
void __builtin_flushd (volatile void *)
void __builtin_flushda (volatile void *)
int __builtin_wrpie (int);
void __builtin_eni (int);
int __builtin_ldex (volatile const void