packages/hal/h8300/sim_s/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)/8*25
  10
  11 //      .file   "delay_us.S"
  12         .h8300s
  13         .text
  14
  15         .global CYG_LABEL_DEFN(hal_delay_us)
  16 CYG_LABEL_DEFN(hal_delay_us):
  17         shlr.l  er0
  18         shlr.l  er0
  19         shlr.l  er0
  20         mov.l   er0,er0
  21 1:
  22         ble     4f
  23         dec.l   #1,er0
  24         bra     1b
  25 4:
  26         rts