57 lines
935 B
ArmAsm
57 lines
935 B
ArmAsm
.include "t-macros.i"
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start
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;; The d10v implements negated addition for subtraction
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.macro check_sub2w s x y r c v
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;; clear carry
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ldi r6,#0x8004
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mvtc r6,cr0
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;; load opnds
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ld2w r6, @(1f,r0)
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ld2w r8, @(2f,r0)
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.data
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1: .long \x
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2: .long \y
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.text
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;; subtract
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SUB2W r6, r8
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;; verify result
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ld2w r10, @(1f,r0)
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.data
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1: .long \r
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.text
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cmpeq r6, r10
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brf0f 2f
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cmpeq r7, r11
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brf0t 3f
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2: ldi r6, 1
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ldi r2, \s
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trap 15
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3:
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;; verify carry
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mvfc r6, cr0
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and3 r6, r6, #1
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cmpeqi r6, #\c
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brf0t 1f
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ldi r6, 1
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ldi r2, \s
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trap 15
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1:
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.endm
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check_sub2w 1 0x00000000 0x00000000 0x00000000 1 0
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check_sub2w 2 0x00000000 0x00000001 0xffffffff 0 0
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check_sub2w 3 0x00000001 0x00000000 0x00000001 1 0
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check_sub2w 3 0x00000001 0x00000001 0x00000000 1 0
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check_sub2w 5 0x00000000 0x80000000 0x80000000 0 1
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check_sub2w 6 0x80000000 0x00000001 0x7fffffff 1 1
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check_sub2w 7 0x7fffffff 0x7fffffff 0x00000000 1 0
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exit0
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