Created
February 2, 2011 06:55
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jitasm sample
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// レジスタ割り当てを行うサンプル | |
struct func_compiler : jitasm::function_cdecl<int, func_compiler, int, int *, double, POINT> | |
{ | |
Result main(Reg32 a, Reg b, XmmReg c, Addr d) | |
{ | |
Reg32 v; | |
mov(v, a); // aをレジスタとしてmov | |
add(v, dword_ptr[b]); | |
movsd(xmm0, c); // Arg<double>はXmmRegとして使える | |
//fld(real8_ptr[c]); // cをスタックからloadしたい場合はXmmReg cをAddr cに変える | |
Reg32 x, y; | |
mov(x, dword_ptr[d]); | |
mov(y, dword_ptr[d + 4]); | |
Reg p; | |
lea(p, dword_ptr[d]); | |
mov(x, dword_ptr[p]); | |
mov(y, dword_ptr[p + 4]); | |
Addr addr = local_alloc(8); | |
mov(dword_ptr[addr], x); | |
mov(dword_ptr[addr + 4], x); | |
return v; | |
} | |
}; | |
// レジスタ割り当てが行われないサンプル | |
struct func_asm : jitasm::function_cdecl<int, func_asm, int, int *, int, POINT> | |
{ | |
Result main(Addr a, Addr b, Addr c, Addr d) | |
{ | |
mov(eax, dword_ptr[a]); | |
mov(zsi, zword_ptr[b]); | |
add(eax, dword_ptr[zsi]); | |
add(eax, dword_ptr[c]); | |
mov(ebx, dword_ptr[d]); | |
mov(ecx, dword_ptr[d + 4]); | |
lea(zsi, dword_ptr[d]); | |
mov(ebx, dword_ptr[zsi]); | |
mov(ecx, dword_ptr[zsi + 4]); | |
Addr addr = local_alloc(8); | |
mov(dword_ptr[addr], ebx); | |
mov(dword_ptr[addr + 4], ecx); | |
return eax; | |
} | |
}; |
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