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43 lines
828 B
ArmAsm
43 lines
828 B
ArmAsm
.text
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main:
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addi a0 x0 110
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addi a1 x0 50
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jal mult
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mv a1 a0
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addi a0 x0 1
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ecall
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j exit
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mult:
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# a0 = a, a1 = b
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# Set Up
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addi sp sp -8 # Move stack pointer down by 8 bytes to store a, ra
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sw a0 4(sp) # Store a
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sw ra 0(sp) # Store ra
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addi t0 x0 1 # t0 = temporary 1
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bne a1 t0 return # if b != 1 then jump to return
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# Base Case
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addi sp sp 8 # Move stack pointer up to previous ra
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jr ra # return a
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return:
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# a + mult(a, b-1)
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addi a1 a1 -1 # b = b-1
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jal mult # call mult(a, b-1)
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# After get output from function (get a0)
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lw t1 4(sp) # load a into t1
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lw ra 0(sp) # Load ra
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addi sp sp 8 # Move stack pointer up to previous ra
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add a0 a0 t1 # a + mult(a, b-1)
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jr ra
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exit:
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addi a0 x0 10
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ecall
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