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1 | int sub_test() |
2 | { |
3 | u32 eax; |
4 | u32 ebx; |
5 | u32 ecx; |
6 | u32 edx; |
7 | u32 esi; |
8 | u32 edi; |
9 | u32 cond_z; |
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10 | u64 tmp64; |
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11 | |
12 | ebx = 0x10000; |
13 | esi = 0x20000; |
14 | edi = 0x30000; |
15 | ecx = 0x0a; |
16 | |
17 | loop: |
18 | LOBYTE(eax) = *(u8 *)esi; esi += 1; // lods |
19 | LOBYTE(eax) = *(u8 *)(ebx + LOBYTE(eax)); // xlat |
20 | *(u8 *)edi = eax; edi += 1; // stos |
21 | LOWORD(eax) = *(u16 *)esi; esi += 2; // lods |
22 | LOWORD(eax) = -(s16)(u16)eax; |
23 | *(u16 *)edi = eax; edi += 2; // stos |
24 | eax = *(u32 *)esi; esi += 4; // lods |
25 | *(u32 *)edi = eax; edi += 4; // stos |
26 | *(u8 *)edi = *(u8 *)esi; edi += 1; esi += 1; // movs |
27 | cond_z = (*(u16 *)esi == *(u16 *)edi); esi += 2; edi += 2; // cmps |
28 | cond_z = ((u8)eax == *(u8 *)edi); edi += 1; // scas |
29 | if (--ecx != 0) |
30 | goto loop; // loop |
31 | *(u8 *)edi = eax; edi -= 1; // stos |
32 | *(u16 *)edi = eax; edi -= 2; // stos |
33 | *(u32 *)edi = eax; edi -= 4; // stos |
34 | edx = (s32)eax >> 31; // cdq |
35 | eax = ecx ? __builtin_ffs(ecx) - 1 : 0; // bsf |
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36 | tmp64 = ((u64)edx << 32) | eax; |
37 | tmp64 = (s64)tmp64 <<= LOBYTE(ecx); |
38 | edx = tmp64 >> 32; eax = tmp64; // allshl |
39 | tmp64 = ((u64)edx << 32) | eax; |
40 | tmp64 = (s64)tmp64 >>= LOBYTE(ecx); |
41 | edx = tmp64 >> 32; eax = tmp64; // allshr |
42 | eax = __builtin_bswap32(eax); |
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43 | eax = 1; |
44 | return eax; |
45 | } |
46 | |