ASMAtomicBitTestAndToggle.asm revision a16eb14ad7a4b5ef91ddc22d3e8e92d930f736fc
78a072e1b56619e3230735ae073668311232ec94vboxsync; innotek Portable Runtime - ASMAtomicBitTestAndToggle().
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78a072e1b56619e3230735ae073668311232ec94vboxsync;*******************************************************************************
78a072e1b56619e3230735ae073668311232ec94vboxsync;* Header Files *
78a072e1b56619e3230735ae073668311232ec94vboxsync;*******************************************************************************
78a072e1b56619e3230735ae073668311232ec94vboxsync; Atomically tests and toggles a bit in a bitmap.
78a072e1b56619e3230735ae073668311232ec94vboxsync; @returns al(rax) true if the bit was set.
78a072e1b56619e3230735ae073668311232ec94vboxsync; @returns al(rax) false if the bit was clear.
78a072e1b56619e3230735ae073668311232ec94vboxsync; @param rcx pvBitmap Pointer to the bitmap.
78a072e1b56619e3230735ae073668311232ec94vboxsync; @param edx iBit The bit to test and toggle.
78a072e1b56619e3230735ae073668311232ec94vboxsyncBEGINPROC_EXPORTED ASMAtomicBitTestAndToggle
78a072e1b56619e3230735ae073668311232ec94vboxsync lock btc [rcx], edx
78a072e1b56619e3230735ae073668311232ec94vboxsync sbb eax, eax
78a072e1b56619e3230735ae073668311232ec94vboxsyncENDPROC ASMAtomicBitTestAndToggle