31 lines
522 B
ArmAsm
31 lines
522 B
ArmAsm
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! sub64u() - unsigned from 64 bit subtraction Author: Kees J. Bot
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! 24 Dec 1995
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.sect .text
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.define _sub64u, _sub64ul
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_sub64u: ! u64_t sub64u(u64_t i, unsigned j);
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push bp
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mov bp, sp
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xor cx, cx
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jmp 0f
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_sub64ul: ! u64_t sub64ul(u64_t i, unsigned long j);
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push bp
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mov bp, sp
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mov cx, 16(bp)
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0: mov bx, 4(bp)
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mov ax, 6(bp)
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sub ax, 14(bp)
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mov (bx), ax
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mov ax, 8(bp)
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sbb ax, cx
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mov 2(bx), ax
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mov ax, 10(bp)
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sbb ax, #0
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mov 4(bx), ax
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mov ax, 12(bp)
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sbb ax, #0
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mov 6(bx), ax
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mov ax, bx
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pop bp
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ret
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