packages/hal/h8300/aki3068net/v2_0/src/delay_us.S

   1 ;;delay_us
   2
   3 #include <pkgconf/hal.h>
   4
   5 #include <cyg/hal/arch.inc>
   6 #include <cyg/hal/basetype.h>
   7 #include <cyg/hal/mod_regs_tmr.h>
   8
   9 #define DELAY_COUNT (CYGHWR_HAL_H8300_PROCESSOR_SPEED/1000000)*16/8
  10
  11 //      .file   "delay_us.S"
  12         .h8300h
  13         .text
  14
  15         .global CYG_LABEL_DEFN(hal_delay_us)
  16 CYG_LABEL_DEFN(hal_delay_us):
  17         shlr.l  er0
  18         mov.l   er0,er0
  19 1:
  20         ble     4f
  21         dec.l   #1,er0
  22         bra     1b
  23 4:
  24         rts
  25