Multiply by negative one

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Multiply by negative one

01-19-2017, 08:23

mcp

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You can move the value to a register and use NEG on it (assuming x86, 32 bit):

Code:

mov eax, [val]
neg eax
mov [val], eax

Alternatively, subtract from zero:

Code:

xor exc, ecx
mov eax, [val]
sub ecx, eax
mov [val], ecx

The Following User Says Thank You to mcp For This Useful Post:
chants (01-19-2017)

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