pseudo_intrinsics.h

ARM公司ATC培训的所有练习源码

#ifndef PSEUDO_INTRINSICS_H_
#define PSEUDO_INTRINSICS_H_

/* Small pieces of assembler that the compiler does not have an intrinsic for.
 * 
 * If kept to a single 32bit instruction or 1 or 2 16bit instructions then
 * the linker will be able to inline the instruction(s) in the space occupied 
 * by the 32bit BL that the compiler uses to call the function.
 * Must turn on inlining with --inline i.e.
 * 
 * armlink --inline ...
 * 
 */
 

__asm void __WFI(void)
{
	WFI
	BX r14
}


__asm void __ISB(void)
{
	ISB
	BX r14
}


__asm void __DSB(void)
{
	DSB
	BX r14
}


__asm void __DMB(void)
{
	DMB
	BX r14
}

__asm int __MRS_control(void)
{
	MRS r0,CONTROL
	BX lr
}

__asm void __MSR_control(int control)
{
	MSR CONTROL,r0
	BX lr
}

#endif /*PSEUDO_INTRINSICS_H_*/