logicalshift.h

简单的虚拟机

#define handle_logishift8(opstr,op,imm) \
{ \
	word __dest = get_op_val(op); \
	__asm__("push %%edx\n\t" \
		 "popfl\n\t" \
		 #opstr" %%cl,%%al\n\t" \
		 "pushfl\n\t" \
		 "pop %%edx\n\t" \
		 :"=a"(__dest),"=d"(cpu.flags) \
		 :"a"(__dest),"d"(cpu.flags),"c"(imm)); \
	set_op_val(op,__dest); \
}

#define handle_logishift16(opstr,op,imm) \
{ \
	word __dest = get_op_val(op); \
	__asm__("push %%edx\n\t" \
		 "popfl\n\t" \
		 #opstr" %%cl,%%ax\n\t" \
		 "pushfl\n\t" \
		 "pop %%edx\n\t" \
		 :"=a"(__dest),"=d"(cpu.flags) \
		 :"a"(__dest),"d"(cpu.flags),"c"(imm)); \
	set_op_val(op,__dest); \
}

#define handle_logicalshift(opstr,op,imm,wFlag) \
	if(wFlag) \
	{ \
		handle_logishift16(opstr,op,imm) \
	} \
	else \
	{ \
		handle_logishift8(opstr,op,imm) \
	}