24 lines
359 B
ArmAsm
24 lines
359 B
ArmAsm
.equ READ_CORE_TIMER, 11
|
|
.equ RESET_CORE_TIMER, 12
|
|
|
|
.data
|
|
.text
|
|
|
|
timedone:
|
|
li $t0, 0
|
|
timedone_if:
|
|
blez $a1, timedone_else
|
|
li $v0, RESET_CORE_TIMER
|
|
syscall
|
|
j timedone_return
|
|
timedone_else:
|
|
li $v0, READ_CORE_TIMER
|
|
syscall
|
|
move $t1, $v0
|
|
mul $t2, $a0, 20000
|
|
ble $t1, $t2, timedone_return
|
|
div $t0, $t1, 20000
|
|
timedown_return:
|
|
move $v0, $t0
|
|
jr $ra
|