34 lines
536 B
NASM
34 lines
536 B
NASM
; Simple RDTSC reader for NASM
|
|
;
|
|
; build with "nasm -f ___ timer.asm" where ___ is coff or elf [or whatever]
|
|
;
|
|
; Most *nix installs use elf so it would be "nasm -f elf timer.asm"
|
|
;
|
|
; Tom St Denis
|
|
[bits 32]
|
|
[section .data]
|
|
timer dd 0, 0
|
|
[section .text]
|
|
|
|
[global _gettsc]
|
|
_gettsc:
|
|
rdtsc
|
|
ret
|
|
|
|
[global _rdtsc]
|
|
_rdtsc:
|
|
rdtsc
|
|
sub eax,[timer]
|
|
sbb edx,[timer+4]
|
|
ret
|
|
|
|
[global _reset]
|
|
_reset:
|
|
push eax
|
|
push edx
|
|
rdtsc
|
|
mov [timer],eax
|
|
mov [timer+4],edx
|
|
pop edx
|
|
pop eax
|
|
ret |