ec_x86.c

来自「分别在x86」· C语言 代码 · 共 41 行

#include "stdafx.h"

uint32 cq_ntohl(uint32 a) {
	__asm{
		mov eax, a;
		bswap eax; 
	}
}

void cq_ntohl_array(uint32* p, uint32 num) {
	__asm{
		mov eax, dword ptr [p];
		mov ecx, num;
next:
		mov ebx, [eax];
		bswap ebx;
		mov dword ptr[eax], ebx;
		add eax, 4;
		loop next;
	}
}

uint16 cq_ntohs(uint16 a) {
	__asm{
		mov ax, a;
		ror ax, 8;
	}
}

void cq_ntohs_array(uint16* arr, uint32 num) {
	__asm{
		mov eax, dword ptr [arr];
		mov ecx, num;
next:
		mov bx, word ptr [eax];
		ror bx, 8;
		mov word ptr[eax], bx;
		add eax, 2;
		loop next;
	}
}