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The swp instruction does not function correctly unless the address is a multiple of 4. #20

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fkuzume opened this issue May 5, 2024 · 0 comments

fkuzume commented May 5, 2024

    mov     r0, #32
    mov     r1, #64
    str     r1, [r11]
    add     r2, r11, #1
    swp     r3, r0, [r2]

When the value of r2 is not a multiple of 4, the swp instruction does not function correctly.

According to the ARM Architecture Reference Manual:

temp = Memory[address,4] Rotate_Right (8 * address[1:0])
Memory[address,4] = Rm
Rd = temp

This is how it is described.

The text was updated successfully, but these errors were encountered:

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