Extension register store.
is an optional condition code.
is the extension register to be saved.
is the ARM register holding the base address for the transfer.
is an optional numeric expression. It must evaluate to a numeric value at assembly time. The value must be a multiple of 4, and lie in the range â€“1020 to +1020. The value is added to the base address to form the address used for the transfer.
VSTR instruction saves thecontents of an extension register to memory.
Two words are transferred.