#### 6.57.21 NDS32 Built-in Functions

These built-in functions are available for the NDS32 target:

— Built-in Function: void __builtin_nds32_isync (int *addr)

> Insert an ISYNC instruction into the instruction stream where addr is an instruction address for serialization.

— Built-in Function: void __builtin_nds32_isb (void)

> Insert an ISB instruction into the instruction stream.

— Built-in Function: int __builtin_nds32_mfsr (int sr)

> Return the content of a system register which is mapped by sr.

— Built-in Function: int __builtin_nds32_mfusr (int usr)

> Return the content of a user space register which is mapped by usr.

— Built-in Function: void __builtin_nds32_mtsr (int value, int sr)

> Move the value to a system register which is mapped by sr.

— Built-in Function: void __builtin_nds32_mtusr (int value, int usr)

> Move the value to a user space register which is mapped by usr.

— Built-in Function: void __builtin_nds32_setgie_en (void)

> Enable global interrupt.

— Built-in Function: void __builtin_nds32_setgie_dis (void)

> Disable global interrupt.