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- # mach: all
- # output:
- # sim: --environment operating
- .include "t-macros.i"
- start
- ;; The d10v implements negated addition for subtraction
- .macro check_sub s x y r c
- ;; clear carry
- ldi r6,#0x8004
- mvtc r6,cr0
- ;; subtract
- ldi r10,#\x
- ldi r11,#\y
- sub r10, r11
- ;; verify result
- ldi r12, #\r
- cmpeq r10, r12
- brf0t 1f
- ldi r6, 1
- ldi r2, #\s
- trap 15
- 1:
- ;; verify carry
- mvfc r6, cr0
- and3 r6, r6, #1
- cmpeqi r6, #\c
- brf0t 1f
- ldi r6, 1
- ldi r2, #\s
- trap 15
- 1:
- .endm
- check_sub 1 0x0000 0x0000 0x0000 1
- check_sub 2 0x0000 0x0001 0xffff 0
- check_sub 3 0x0001 0x0000 0x0001 1
- check_sub 4 0x0001 0x0001 0x0000 1
- check_sub 5 0x0000 0x8000 0x8000 0
- check_sub 6 0x8000 0x0001 0x7fff 1
- check_sub 7 0x7fff 0x7fff 0x0000 1
- exit0
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