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| segment .text | |
| global _start | |
| _start: | |
| XOR R5, R5 ; clear r5 | |
| XOR R6, R6 ; clear r6 | |
| INC R6 ; increment r6 | |
| SRC R1 ; shift right with carry | |
| JC _carry ; if carry jump _carry | |
| INC R6 ; now r6 is 2 | |
| SRC R1 ; shift right with carry | |
| JC _carry ; if carry jump _carry | |
| XOR R6, R6 | |
| INC R6 | |
| SRC R2 | |
| JC _carry | |
| INC R6 | |
| SRC R2 | |
| JC _carry | |
| XOR R6, R6 | |
| INC R6 | |
| SRC R3 | |
| JC _carry | |
| INC R6 | |
| SRC R3 | |
| JC _carry | |
| XOR R6, R6 | |
| INC R6 | |
| SRC R4 | |
| JC _carry | |
| INC R6 | |
| SRC R4 | |
| JC _carry | |
| MOV R5, R6 ; R6 = R5 | |
| XOR R5, R5 ; clear r5 | |
| ADD R1, R5 ; R5 += R1 | |
| ADD R2, R5 ; R5 += R2 | |
| ADD R3, R5 ; R5 += R3 | |
| ADD R4, R5 ; R5 += R4 | |
| ; now R5 hold integer part, R6 hold lost precision | |
| _carry: | |
| ADD R6, R5 ; R5 = R6+R5 | |
| CLC ; clear carry flag | |
| ret ; return |
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