EN0-001 Exam Dumps : ARM Accredited Engineer

An interrupt handler contains the following instruction sequence at the end. The purpose of these instructions is to clear the interrupt request in the interrupt controller and then safely re-enable interrupts.

STR r0, [r1] ; write to interrupt controller register to clear interrupt request

CPSIE i ; re-enable IRQ interrupts

Which of the following instructions should be placed at position in order to ensure that the interrupt controller sees the write before interrupts are re-enabled?

According to the AAPCS (with soft floating point linkage), when the caller "func" calls sprintf, where is the value of the parameter "x" placed?

#include

void func(double x, int i , char *buffer)

{

sprintf(buffer, "pass %d: value = %f\n", i, x); }

Which events would be counted using the Performance Monitoring Unit (PMU) in order to measure the data cache efficiency of an application?