Subversion Repositories scarts

.include "t-macros.i"

        start

;;  The d10v implements negated addition for subtraction

        .macro check_sub2w s x y r c v

        ;; clear carry

        ldi     r6,#0x8004

        mvtc    r6,cr0

        ;; load opnds

        ld2w    r6, @(1f,r0)

        ld2w    r8, @(2f,r0)

        .data

1:      .long   \x

2:      .long   \y

        .text

        ;; subtract

        SUB2W   r6, r8

        ;; verify result

        ld2w    r10, @(1f,r0)

        .data

1:      .long   \r

        .text

        cmpeq   r6, r10

        brf0f   2f

        cmpeq   r7, r11

        brf0t   3f

2:      ldi     r4, 1

        ldi     r0, \s

        trap    15

3:

        ;; verify carry

        mvfc    r6, cr0

        and3    r6, r6, #1

        cmpeqi  r6, #\c

        brf0t   1f

        ldi     r4, 1

        ldi     r0, \s

        trap    15

1:

        .endm

check_sub2w 1 0x00000000 0x00000000  0x00000000 1 0

check_sub2w 2 0x00000000 0x00000001  0xffffffff 0 0

check_sub2w 3 0x00000001 0x00000000  0x00000001 1 0

check_sub2w 3 0x00000001 0x00000001  0x00000000 1 0

check_sub2w 5 0x00000000 0x80000000  0x80000000 0 1

check_sub2w 6 0x80000000 0x00000001  0x7fffffff 1 1

check_sub2w 7 0x7fffffff 0x7fffffff  0x00000000 1 0

        exit0