derek.holloway
7502bf64a4
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47 lines
748 B
ArmAsm
47 lines
748 B
ArmAsm
# mach: all
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# output:
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# sim: --environment operating
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.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_sub s x y r c
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;; clear carry
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ldi r6,#0x8004
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mvtc r6,cr0
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;; subtract
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ldi r10,#\x
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ldi r11,#\y
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sub r10, r11
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;; verify result
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ldi r12, #\r
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cmpeq r10, r12
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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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;; 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_sub 1 0x0000 0x0000 0x0000 1
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check_sub 2 0x0000 0x0001 0xffff 0
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check_sub 3 0x0001 0x0000 0x0001 1
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check_sub 4 0x0001 0x0001 0x0000 1
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check_sub 5 0x0000 0x8000 0x8000 0
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check_sub 6 0x8000 0x0001 0x7fff 1
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check_sub 7 0x7fff 0x7fff 0x0000 1
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exit0
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