53 lines
877 B
ArmAsm
Executable file
53 lines
877 B
ArmAsm
Executable file
! cmp64*() - 64 bit compare Author: Kees J. Bot
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! 24 Dec 1995
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.sect .text
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.define _cmp64, _cmp64u, _cmp64ul
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_cmp64: ! int cmp64(u64_t i, u64_t j);
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mov bx, sp
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cmp64: xor ax, ax
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mov dx, 2(bx)
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sub dx, 10(bx)
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mov dx, 4(bx)
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sbb dx, 12(bx)
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mov dx, 6(bx)
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sbb dx, 14(bx)
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mov dx, 8(bx)
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sbb dx, 16(bx)
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sbb ax, ax ! ax = - (i < j)
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mov dx, 10(bx)
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sub dx, 2(bx)
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mov dx, 12(bx)
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sbb dx, 4(bx)
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mov dx, 14(bx)
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sbb dx, 6(bx)
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mov dx, 16(bx)
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sbb dx, 8(bx)
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adc ax, #0 ! ax = (i > j) - (i < j)
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ret
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_cmp64u: ! int cmp64u(u64_t i, unsigned j);
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mov bx, sp
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push 16(bx)
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mov 16(bx), #0
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push 14(bx)
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mov 14(bx), #0
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push 12(bx)
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mov 12(bx), #0
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call cmp64
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pop 12(bx)
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pop 14(bx)
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pop 16(bx)
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ret
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_cmp64ul: ! int cmp64ul(u64_t i, unsigned long j);
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mov bx, sp
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push 14(bx)
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mov 14(bx), #0
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push 12(bx)
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mov 12(bx), #0
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call cmp64
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pop 12(bx)
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pop 14(bx)
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ret
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