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.file "arm-tas-v7.S"
#ifndef ARMv7
#define DMB mcr p15, 0, r0, c7, c10, 5
#else
#define DMB dmb
#endif
.align 2
.global _tas
.type _tas, %function
_tas:
@ args = 0, pretend = 0, frame = 0
@ frame_needed = 0, uses_anonymous_args = 0
@ link register save eliminated.
@ lr needed for prologue
DMB
mov r1, r0
mov r2, #0xaa
tas1:
ldrex r0, [r1]
cmp r0, #0
bne lockbusy
strex r3, r2, [r1]
cmp r3, #0
bne tas1
DMB
bx lr
lockbusy:
clrex
bx lr
.size _tas, .-_tas
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