1; x86 timer in NASM 2; 3; Tom St Denis, tomstdenis@iahu.ca 4[bits 32] 5[section .data] 6time dd 0, 0 7 8[section .text] 9 10%ifdef USE_ELF 11[global t_start] 12t_start: 13%else 14[global _t_start] 15_t_start: 16%endif 17 push edx 18 push eax 19 rdtsc 20 mov [time+0],edx 21 mov [time+4],eax 22 pop eax 23 pop edx 24 ret 25 26%ifdef USE_ELF 27[global t_read] 28t_read: 29%else 30[global _t_read] 31_t_read: 32%endif 33 rdtsc 34 sub eax,[time+4] 35 sbb edx,[time+0] 36 ret 37