mirror of
https://github.com/herumi/xbyak
synced 2024-11-20 16:06:14 -07:00
127 lines
2.2 KiB
C++
127 lines
2.2 KiB
C++
/*
|
|
sample of move(reg, LABEL);, L(LABEL), putL(LABEL);
|
|
*/
|
|
#include <stdio.h>
|
|
#include <xbyak/xbyak.h>
|
|
|
|
const int expectTbl[] = {
|
|
5, 9, 12
|
|
};
|
|
|
|
struct Code : Xbyak::CodeGenerator {
|
|
explicit Code(int mode, size_t size, void *p)
|
|
: Xbyak::CodeGenerator(size, p)
|
|
{
|
|
inLocalLabel();
|
|
#ifdef XBYAK64
|
|
const Xbyak::Reg64& a = rax;
|
|
const Xbyak::Reg64& c = rcx;
|
|
#ifdef XBYAK64_WIN
|
|
mov(rax, rcx);
|
|
#else
|
|
mov(rax, rdi);
|
|
#endif
|
|
#else
|
|
const Xbyak::Reg32& a = eax;
|
|
const Xbyak::Reg32& c = ecx;
|
|
mov(a, ptr [esp + 4]);
|
|
#endif
|
|
|
|
switch (mode) {
|
|
case 0:
|
|
mov(c, ".jmp_table");
|
|
lea(c, ptr [c + a * 8]);
|
|
jmp(c);
|
|
align(8);
|
|
L(".jmp_table");
|
|
mov(a, expectTbl[0]);
|
|
ret();
|
|
align(8);
|
|
mov(a, expectTbl[1]);
|
|
ret();
|
|
align(8);
|
|
mov(a, expectTbl[2]);
|
|
ret();
|
|
break;
|
|
|
|
case 1:
|
|
/*
|
|
the label for putL is defined when called
|
|
*/
|
|
mov(c, ".jmp_table");
|
|
jmp(ptr [c + a * (int)sizeof(size_t)]);
|
|
L(".label1");
|
|
mov(a, expectTbl[0]);
|
|
jmp(".end");
|
|
L(".label2");
|
|
mov(a, expectTbl[1]);
|
|
jmp(".end");
|
|
L(".label3");
|
|
mov(a, expectTbl[2]);
|
|
jmp(".end");
|
|
L(".end");
|
|
ret();
|
|
ud2();
|
|
|
|
align(8);
|
|
L(".jmp_table");
|
|
putL(".label1");
|
|
putL(".label2");
|
|
putL(".label3");
|
|
break;
|
|
|
|
case 2:
|
|
/*
|
|
the label for putL is not defined when called
|
|
*/
|
|
jmp(".in");
|
|
ud2();
|
|
align(8);
|
|
L(".jmp_table");
|
|
putL(".label1");
|
|
putL(".label2");
|
|
putL(".label3");
|
|
L(".in");
|
|
mov(c, ".jmp_table");
|
|
jmp(ptr [c + a * (int)sizeof(size_t)]);
|
|
L(".label1");
|
|
mov(a, expectTbl[0]);
|
|
jmp(".end");
|
|
L(".label2");
|
|
mov(a, expectTbl[1]);
|
|
jmp(".end");
|
|
L(".label3");
|
|
mov(a, expectTbl[2]);
|
|
jmp(".end");
|
|
L(".end");
|
|
ret();
|
|
break;
|
|
}
|
|
outLocalLabel();
|
|
}
|
|
};
|
|
|
|
int main()
|
|
try
|
|
{
|
|
for (int mode = 0; mode < 3; mode++) {
|
|
printf("mode=%d\n", mode);
|
|
for (int grow = 0; grow < 2; grow++) {
|
|
printf("auto grow=%s\n", grow ? "on" : "off");
|
|
Code c(mode, grow ? 30 : 4096, grow ? Xbyak::AutoGrow : 0);
|
|
int (*f)(int) = c.getCode<int (*)(int)>();
|
|
c.ready();
|
|
for (int i = 0; i < 3; i++) {
|
|
const int a = expectTbl[i];
|
|
const int b = f(i);
|
|
if (a != b) {
|
|
printf("ERR i=%d, a=%d, b=%d\n", i, a, b);
|
|
exit(1);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
puts("ok");
|
|
} catch (std::exception& e) {
|
|
printf("ERR %s\n", e.what());
|
|
}
|