sim/testsuite/sim/arm/movw-movt.ms

   1 # output(): Hello, world.\n
   2 # mach(): all
   3
   4 # This is a test for movw & movt instructions.
   5 # It emits hello world if movw & movt works appropriately.
   6
   7         .macro invalid
   8 # This is "undefined" but it's not properly decoded yet.
   9         .word 0x07ffffff
  10 # This is stc which isn't recognized yet.
  11         stc 0,cr0,[r0]
  12         .endm
  13
  14         .global _start
  15 _start:
  16 # Run some simple insns to confirm the engine is at least working.
  17         nop
  18
  19 # Skip over output text.
  20
  21         bl skip_output
  22
  23 hello_text:
  24         .asciz "Hello, world.\n"
  25
  26         .p2align 2
  27 skip_output:
  28         movw r4, #:lower16:hello_text
  29         movt r4, #:upper16:hello_text
  30
  31 output_next:
  32 # Output a character
  33         mov r0,#3
  34         mov r1,r4
  35         swi #0x123456
  36
  37 # Load next character, see if done.
  38         add r4,r4,#1
  39         sub r3,r3,r3
  40         ldrb r5,[r4,r3]
  41         teq r5,#0
  42         bne output_next
  43
  44 done:
  45         mov r0,#0x18
  46         ldr r1,exit_code
  47         swi #0x123456
  48
  49 # If that fails, try to die with an invalid insn.
  50         invalid
  51
  52 exit_code:
  53         .word 0x20026