代码

#define assemble(x) \
__asm ( \
"lea    "#x"(%eax),%ecx \n " \
"cmp    %edx,(%ecx) \n" \
"cmovbe %ecx,%eax \n" \
);

__asm (
".globl binary_search \n"
"binary_search: \n"
"mov    $0x5f5e100,%eax \n"
"mull   0xc(%esp) \n"
"mov    0x4(%esp),%eax \n"
"lea    -0xb000(%eax,%edx,4),%eax \n"
"mov    0xc(%esp),%edx"
);
assemble(0x8000);
assemble(0x4000);
assemble(0x2000);
assemble(0x1000);
assemble(0x800);
assemble(0x400);
assemble(0x200);
assemble(0x100);
assemble(0x80);
assemble(0x40);
assemble(0x20);
assemble(0x10);
assemble(0x8);
assemble(0x4);
__asm (
"sub    0x4(%esp),%eax \n"
"sar    $0x2,%eax \n"
"ret \n"
);

评测结果