55 lines
565 B
ArmAsm
55 lines
565 B
ArmAsm
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.title "H8/500 DIVIDE"
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!! 2 byte integer Divide code for the H8/500
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!!
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!! Steve Chamberlain
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!! sac@cygnus.com
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!!
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!!
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!! args in r1 and r4, result in r0/r1
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#if __CODE__==32
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#define RET prts
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#else
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#define RET rts
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#endif
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.global __divmodhi4
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__divmodhi4:
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clr.w r0
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tst.w r1 ! neg arg1
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bpl PU
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neg.w r1
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NU: tst.w r4
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bmi NN
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NP: divxu.w r4,r0
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neg.w r0
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neg.w r1
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RET
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NN: neg.w r4
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divxu.w r4,r0
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neg.w r0 ! get rem sign right
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RET
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PU:
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tst.w r4
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bpl PP
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PN: neg.w r4
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divxu.w r4,r0
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neg.w r1
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RET
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PP: divxu.w r4,r0 ! rem in r0, q in r1
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RET
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