sim/testsuite/d10v-elf/t-sub.s

   1 .include "t-macros.i"
   2
   3         start
   4
   5 ;;  The d10v implements negated addition for subtraction
   6
   7         .macro check_sub s x y r c
   8         ;; clear carry
   9         ldi     r6,#0x8004
  10         mvtc    r6,cr0
  11         ;; subtract
  12         ldi     r10,#\x
  13         ldi     r11,#\y
  14         sub     r10, r11
  15         ;; verify result
  16         ldi     r12, #\r
  17         cmpeq   r10, r12
  18         brf0t   1f
  19         ldi     r6, 1
  20         ldi     r2, #\s
  21         trap    15
  22 1:
  23         ;; verify carry
  24         mvfc    r6, cr0
  25         and3    r6, r6, #1
  26         cmpeqi  r6, #\c
  27         brf0t   1f
  28         ldi     r6, 1
  29         ldi     r2, #\s
  30         trap    15
  31 1:
  32         .endm
  33
  34 check_sub 1 0x0000 0x0000  0x0000  1
  35 check_sub 2 0x0000 0x0001  0xffff  0
  36 check_sub 3 0x0001 0x0000  0x0001  1
  37 check_sub 4 0x0001 0x0001  0x0000  1
  38 check_sub 5 0x0000 0x8000  0x8000  0
  39 check_sub 6 0x8000 0x0001  0x7fff  1
  40 check_sub 7 0x7fff 0x7fff  0x0000  1
  41
  42         exit0