EN0-001 Exam Dumps : ARM Accredited Engineer

Which of the following processor resources do NOT have to be saved or modified by the Linux scheduler during context switch?

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?

An Advanced SIMD intrinsic has the prototype:

uint8xl6x2_t vld2q_u8 (uint8_t const * ptr);

How many bytes does this intrinsic load from memory?