Other MIPS Built-in Functions#
GCC provides other MIPS-specific built-in functions:
-
void __builtin_mips_cache(int op, volatile const void *addr)#
Insert a
cache
instruction with operandsop
andaddr
. GCC defines the preprocessor macro___GCC_HAVE_BUILTIN_MIPS_CACHE
when this function is available.
-
unsigned int __builtin_mips_get_fcsr(void)#
-
void __builtin_mips_set_fcsr(unsigned int value)#
Get and set the contents of the floating-point control and status register (FPU control register 31). These functions are only available in hard-float code but can be called in both MIPS16 and non-MIPS16 contexts.
__builtin_mips_set_fcsr
can be used to change any bit of the register except the condition codes, which GCC assumes are preserved.