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hikey960
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82c807137a2c3f033e23e414476d131e88ad221a
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uefi
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linaro-edk2
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OvmfPkg
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XenBusDxe
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X64
/
TestAndClearBit.nasm
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DEFAULT REL
SECTION
.
text
;
INT32
;
EFIAPI
;
TestAndClearBit
(
;
IN INT32
Bit
,
// rcx
;
IN
volatile
VOID
*
Address
// rdx
;
);
global
ASM_PFX
(
TestAndClearBit
)
ASM_PFX
(
TestAndClearBit
):
lock
btr
[
rdx
],
ecx
sbb eax
,
eax
ret