39 lines
546 B
ArmAsm
39 lines
546 B
ArmAsm
.define .dvi
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.sect .text
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.dvi: LDMFD R12<,{R1,R2}
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STMFD R12<,{R4}
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CMP R1,#0
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BEQ dbyzero
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MOV R4,#0
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CMP R1,#0
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ADD.LT R4,R4,#1
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RSB.LT R1,R1,#0
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CMP R2,#0
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ADD.LT R4,R4,#2
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RSB.LT R2,R2,#0
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MOV R0,#1
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div1: CMP R1,#0x80000000
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CMP.CC R1,R2
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MOV.CC R1,R1,ASL #1
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MOV.CC R0,R0,ASL #1
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BCC div1
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MOV R3,#0
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div2: CMP R2,R1
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SUB.CS R2,R2,R1
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ADD.CS R3,R3,R0
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MOV.S R0,R0,LSR #1
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MOV.NE R1,R1,LSR #1
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BNE div2
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CMP R4, #1
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RSB.EQ R3,R3,#0
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CMP R4,#2
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RSB.EQ R3,R3,#0
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LDMFD R12<,{R4}
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MOV R15,R14
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dbyzero:
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MOV R0,#6
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STMFD R12<,{R0}
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BAL _EmTrp
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