| global _start |
| |
| section .data |
| align 16 |
| quad1: |
| dq 0xad0000ceadad00ff |
| quad2: |
| dq 0xffffffffffffffff |
| quad3: |
| dq 0x0000000000000000 |
| quad4: |
| dq 0x7fff8000ffff0808 |
| myquad: |
| dq 0xad0000ceadad00ff |
| mydword: |
| dd 0xcafebabe |
| myaddress: |
| dq 0x00adbeefc0de00ce |
| |
| MBALIGN equ 1<<0 ; align loaded modules on page boundaries |
| MEMINFO equ 1<<1 ; provide memory map |
| FLAGS equ 0 ; this is the Multiboot 'flag' field |
| MAGIC equ 0x1BADB002 ; 'magic number' lets bootloader find the header |
| CHECKSUM equ -(MAGIC + FLAGS) ; checksum of above, to prove we are multiboot |
| section .multiboot |
| align 4 |
| dd MAGIC |
| dd FLAGS |
| dd CHECKSUM |
| |
| section .text |
| |
| _start: |
| main: |
| movq mm0, [quad1] |
| movq mm1, [quad2] |
| movq mm2, [quad3] |
| movq mm3, [quad4] |
| movq mm4, [quad1] |
| |
| psubw mm1, [quad2] |
| psubw mm1, mm2 |
| psubw mm2, [quad1] |
| psubw mm2, mm3 |
| psubw mm3, [quad3] |
| psubw mm3, mm4 |
| psubw mm4, [quad1] |
| psubw mm4, mm1 |
| psubw mm4, mm3 |
| |
| |
| loop: |
| hlt |
| jmp loop |