#include <stdio.h> static int movzbw_1 ( void ) { int res; __asm__ __volatile__( "movl $0x12345678, %%eax\n\t" "movb $0x22, %%al\n\t" "movzbw %%al,%%ax\n\t" "mov %%eax, %0" : "=r"(res) : : "eax" ); return res; } static int movzbw_2 ( void ) { int res; __asm__ __volatile__( "movl $0x12345678, %%eax\n\t" "movb $0x99, %%al\n\t" "movzbw %%al,%%ax\n\t" "mov %%eax, %0" : "=r"(res) : : "eax" ); return res; } static int movzbl_1 ( void ) { int res; __asm__ __volatile__( "movl $0x12345678, %%eax\n\t" "movb $0x22, %%al\n\t" "movzbl %%al,%%eax\n\t" "mov %%eax, %0" : "=r"(res) : : "eax" ); return res; } static int movzbl_2 ( void ) { int res; __asm__ __volatile__( "movl $0x12345678, %%eax\n\t" "movb $0x99, %%al\n\t" "movzbl %%al,%%eax\n\t" "mov %%eax, %0" : "=r"(res) : : "eax" ); return res; } static int movzwl_1 ( void ) { int res; __asm__ __volatile__( "movl $0x12345678, %%eax\n\t" "movw $0x2222, %%ax\n\t" "movzwl %%ax,%%eax\n\t" "mov %%eax, %0" : "=r"(res) : : "eax" ); return res; } static int movzwl_2 ( void ) { int res; __asm__ __volatile__( "movl $0x12345678, %%eax\n\t" "movw $0x9999, %%ax\n\t" "movzwl %%ax,%%eax\n\t" "mov %%eax, %0" : "=r"(res) : : "eax" ); return res; } static int movsbw_1 ( void ) { int res; __asm__ __volatile__( "movl $0x12345678, %%eax\n\t" "movb $0x22, %%al\n\t" "movsbw %%al,%%ax\n\t" "mov %%eax, %0" : "=r"(res) : : "eax" ); return res; } static int movsbw_2 ( void ) { int res; __asm__ __volatile__( "movl $0x12345678, %%eax\n\t" "movb $0x99, %%al\n\t" "movsbw %%al,%%ax\n\t" "mov %%eax, %0" : "=r"(res) : : "eax" ); return res; } static int movsbl_1 ( void ) { int res; __asm__ __volatile__( "movl $0x12345678, %%eax\n\t" "movb $0x22, %%al\n\t" "movsbl %%al,%%eax\n\t" "mov %%eax, %0" : "=r"(res) : : "eax" ); return res; } static int movsbl_2 ( void ) { int res; __asm__ __volatile__( "movl $0x12345678, %%eax\n\t" "movb $0x99, %%al\n\t" "movsbl %%al,%%eax\n\t" "mov %%eax, %0" : "=r"(res) : : "eax" ); return res; } static int movswl_1 ( void ) { int res; __asm__ __volatile__( "movl $0x12345678, %%eax\n\t" "movw $0x2222, %%ax\n\t" "movswl %%ax,%%eax\n\t" "mov %%eax, %0" : "=r"(res) : : "eax" ); return res; } static int movswl_2 ( void ) { int res; __asm__ __volatile__( "movl $0x12345678, %%eax\n\t" "movw $0x9999, %%ax\n\t" "movswl %%ax,%%eax\n\t" "mov %%eax, %0" : "=r"(res) : : "eax" ); return res; } int main ( void ) { printf("%8s 0x%08x\n", "movzbw_1", movzbw_1()); printf("%8s 0x%08x\n", "movzbw_2", movzbw_2()); printf("%8s 0x%08x\n", "movzbl_1", movzbl_1()); printf("%8s 0x%08x\n", "movzbl_2", movzbl_2()); printf("%8s 0x%08x\n", "movzwl_1", movzwl_1()); printf("%8s 0x%08x\n", "movzwl_2", movzwl_2()); printf("%8s 0x%08x\n", "movsbw_1", movsbw_1()); printf("%8s 0x%08x\n", "movsbw_2", movsbw_2()); printf("%8s 0x%08x\n", "movsbl_1", movsbl_1()); printf("%8s 0x%08x\n", "movsbl_2", movsbl_2()); printf("%8s 0x%08x\n", "movswl_1", movswl_1()); printf("%8s 0x%08x\n", "movswl_2", movswl_2()); return 0; }