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65 lines
1.5 KiB
65 lines
1.5 KiB
6 years ago
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#ip 4
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; while (123 & 456 != 72);
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00: seti 123 0 2
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01: bani 2 456 2
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02: eqri 2 72 2
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03: addr 2 4 4
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04: seti 0 0 4
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05: seti 0 8 2 ; r2 = 0
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; xref 30
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06: bori 2 65536 5 ; r5 = r2 | 0x10000
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07: seti 2238642 0 2 ; r2 = 2238642
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; xref 27
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08: bani 5 255 3 ; r3 = r5 & 0xff
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09: addr 2 3 2 ; r2 = r2 + r3
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10: bani 2 16777215 2 ; r2 = r2 & 0xffffff
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11: muli 2 65899 2 ; r2 = r2 * 65899
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12: bani 2 16777215 2 ; r2 = r2 & 0xffffff
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; trash = r3
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; keep = r2, r5
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13: gtir 256 5 3 ; if (0x100 > r5)
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14: addr 3 4 4 ; then
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15: addi 4 1 4 ; (false) jr +1 (17)
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16: seti 27 3 4 ; (true ) jp 27 (28)
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; xref 16 (256 <= r5)
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; r5 >>= 8
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17: seti 0 8 3 ; r3 = 0
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18: addi 3 1 1 ; r1 = r3 + 1
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19: muli 1 256 1 ; r1 = r1 * 0x100
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20: gtrr 1 5 1 ; if (r1 > r5)
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21: addr 1 4 4 ; then
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22: addi 4 1 4 ; ..
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23: seti 25 4 4 ; ..
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24: addi 3 1 3 ; (false) r3 = r3 + 1
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25: seti 17 2 4 ; (false) jp 17 (18)
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26: setr 3 9 5 ; (true ) r5 = r3
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27: seti 7 9 4 ; (true ) jp 07 (08)
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; xref 16 (256 > r5)
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28: eqrr 2 0 3 ; if (r2 == r0)
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29: addr 3 4 4 ; then
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30: seti 5 0 4 ; (false) jp 05 (06)
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; (true ) exit
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; ===== HIGH-LEVEL PSEUDOCODE =====
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r2 = 0
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do {
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r5 = r2 | 0x10000
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r2 = 2238642
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while (1) {
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// r2 = (r2 + r5) * 65899
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r2 = (((r2 + (r5 & 0xff)) & 0xffffff) * 65899) & 0xffffff
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if (0x100 > r5) break
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r5 >>= 8
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}
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} while (r2 != r0)
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