derek.holloway
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45 lines
1.0 KiB
ArmAsm
45 lines
1.0 KiB
ArmAsm
# mach: bpf
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# output: pass\nexit 0 (0x0)\n
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/* xadd.s
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Tests for BPF atomic exchange-and-add instructions in simulator
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The xadd instructions (XADDW, XADDDW) operate on a memory location
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specified in $dst + offset16, atomically adding the value in $src.
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In the simulator, there isn't anything else happening. The atomic
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instructions are identical to a non-atomic load/add/store. */
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.include "testutils.inc"
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.text
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.global main
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.type main, @function
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main:
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mov %r1, 0x1000
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mov %r2, 5
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/* basic xadd w */
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stw [%r1+0], 10
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xaddw [%r1+0], %r2
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ldxw %r3, [%r1+0]
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fail_ne %r3, 15
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/* basic xadd dw */
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stdw [%r1+8], 42
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xadddw [%r1+8], %r2
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ldxdw %r3, [%r1+8]
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fail_ne %r3, 47
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/* xadd w negative value */
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mov %r4, -1
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xaddw [%r1+0], %r4
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ldxw %r3, [%r1+0]
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fail_ne %r3, 14
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/* xadd dw negative val */
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xadddw [%r1+8], %r4
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ldxdw %r3, [%r1+8]
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fail_ne %r3, 46
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pass
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