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.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