109 lines
1.9 KiB
ArmAsm
109 lines
1.9 KiB
ArmAsm
! Copyright (C) 2012 Imagination Technologies Ltd.
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!
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! Signed/unsigned 64-bit division routines.
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!
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.text
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.global _div_u64
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.type _div_u64,function
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_div_u64:
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$L1:
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ORS A0.3,D1Ar3,D0Ar4
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BNE $L3
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$L2:
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MOV D0Re0,D0Ar2
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MOV D1Re0,D1Ar1
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MOV PC,D1RtP
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$L3:
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CMP D1Ar3,D1Ar1
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CMPEQ D0Ar4,D0Ar2
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MOV D0Re0,#1
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MOV D1Re0,#0
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BHS $L6
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$L4:
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ADDS D0Ar6,D0Ar4,D0Ar4
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ADD D1Ar5,D1Ar3,D1Ar3
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ADDCS D1Ar5,D1Ar5,#1
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CMP D1Ar5,D1Ar3
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CMPEQ D0Ar6,D0Ar4
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BLO $L6
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$L5:
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MOV D0Ar4,D0Ar6
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MOV D1Ar3,D1Ar5
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ADDS D0Re0,D0Re0,D0Re0
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ADD D1Re0,D1Re0,D1Re0
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ADDCS D1Re0,D1Re0,#1
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CMP D1Ar3,D1Ar1
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CMPEQ D0Ar4,D0Ar2
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BLO $L4
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$L6:
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ORS A0.3,D1Re0,D0Re0
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MOV D0Ar6,#0
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MOV D1Ar5,D0Ar6
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BEQ $L10
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$L7:
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CMP D1Ar1,D1Ar3
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CMPEQ D0Ar2,D0Ar4
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BLO $L9
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$L8:
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ADDS D0Ar6,D0Ar6,D0Re0
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ADD D1Ar5,D1Ar5,D1Re0
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ADDCS D1Ar5,D1Ar5,#1
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SUBS D0Ar2,D0Ar2,D0Ar4
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SUB D1Ar1,D1Ar1,D1Ar3
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SUBCS D1Ar1,D1Ar1,#1
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$L9:
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LSL A0.3,D1Re0,#31
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LSR D0Re0,D0Re0,#1
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LSR D1Re0,D1Re0,#1
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OR D0Re0,D0Re0,A0.3
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LSL A0.3,D1Ar3,#31
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LSR D0Ar4,D0Ar4,#1
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LSR D1Ar3,D1Ar3,#1
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OR D0Ar4,D0Ar4,A0.3
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ORS A0.3,D1Re0,D0Re0
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BNE $L7
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$L10:
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MOV D0Re0,D0Ar6
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MOV D1Re0,D1Ar5
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MOV PC,D1RtP
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.size _div_u64,.-_div_u64
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.text
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.global _div_s64
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.type _div_s64,function
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_div_s64:
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MSETL [A0StP],D0FrT,D0.5
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XOR D0.5,D0Ar2,D0Ar4
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XOR D1.5,D1Ar1,D1Ar3
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TSTT D1Ar1,#HI(0x80000000)
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BZ $L25
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NEGS D0Ar2,D0Ar2
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NEG D1Ar1,D1Ar1
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SUBCS D1Ar1,D1Ar1,#1
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$L25:
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TSTT D1Ar3,#HI(0x80000000)
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BZ $L27
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NEGS D0Ar4,D0Ar4
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NEG D1Ar3,D1Ar3
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SUBCS D1Ar3,D1Ar3,#1
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$L27:
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CALLR D1RtP,_div_u64
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TSTT D1.5,#HI(0x80000000)
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BZ $L29
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NEGS D0Re0,D0Re0
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NEG D1Re0,D1Re0
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SUBCS D1Re0,D1Re0,#1
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$L29:
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GETL D0FrT,D1RtP,[A0StP+#(-16)]
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GETL D0.5,D1.5,[A0StP+#(-8)]
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SUB A0StP,A0StP,#16
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MOV PC,D1RtP
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.size _div_s64,.-_div_s64
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