diff options
author | James Hogan <james.hogan@imgtec.com> | 2012-10-05 17:02:09 +0100 |
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committer | James Hogan <james.hogan@imgtec.com> | 2013-03-02 20:09:52 +0000 |
commit | 086e9dc0e2ca925b1b58caefd04ed2757d14790b (patch) | |
tree | cfe182f1d07d40d09d2cae09e337423462250cac /arch/metag/lib/div64.S | |
parent | f507758ccbed5c354cc1ce3b8f53ea072d7bc222 (diff) |
metag: Optimised library functions
Add optimised library functions for metag.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Diffstat (limited to 'arch/metag/lib/div64.S')
-rw-r--r-- | arch/metag/lib/div64.S | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/arch/metag/lib/div64.S b/arch/metag/lib/div64.S new file mode 100644 index 000000000000..1cfc93498f70 --- /dev/null +++ b/arch/metag/lib/div64.S @@ -0,0 +1,108 @@ +! Copyright (C) 2012 Imagination Technologies Ltd. +! +! Signed/unsigned 64-bit division routines. +! + + .text + .global _div_u64 + .type _div_u64,function + +_div_u64: +$L1: + ORS A0.3,D1Ar3,D0Ar4 + BNE $L3 +$L2: + MOV D0Re0,D0Ar2 + MOV D1Re0,D1Ar1 + MOV PC,D1RtP +$L3: + CMP D1Ar3,D1Ar1 + CMPEQ D0Ar4,D0Ar2 + MOV D0Re0,#1 + MOV D1Re0,#0 + BHS $L6 +$L4: + ADDS D0Ar6,D0Ar4,D0Ar4 + ADD D1Ar5,D1Ar3,D1Ar3 + ADDCS D1Ar5,D1Ar5,#1 + CMP D1Ar5,D1Ar3 + CMPEQ D0Ar6,D0Ar4 + BLO $L6 +$L5: + MOV D0Ar4,D0Ar6 + MOV D1Ar3,D1Ar5 + ADDS D0Re0,D0Re0,D0Re0 + ADD D1Re0,D1Re0,D1Re0 + ADDCS D1Re0,D1Re0,#1 + CMP D1Ar3,D1Ar1 + CMPEQ D0Ar4,D0Ar2 + BLO $L4 +$L6: + ORS A0.3,D1Re0,D0Re0 + MOV D0Ar6,#0 + MOV D1Ar5,D0Ar6 + BEQ $L10 +$L7: + CMP D1Ar1,D1Ar3 + CMPEQ D0Ar2,D0Ar4 + BLO $L9 +$L8: + ADDS D0Ar6,D0Ar6,D0Re0 + ADD D1Ar5,D1Ar5,D1Re0 + ADDCS D1Ar5,D1Ar5,#1 + + SUBS D0Ar2,D0Ar2,D0Ar4 + SUB D1Ar1,D1Ar1,D1Ar3 + SUBCS D1Ar1,D1Ar1,#1 +$L9: + LSL A0.3,D1Re0,#31 + LSR D0Re0,D0Re0,#1 + LSR D1Re0,D1Re0,#1 + OR D0Re0,D0Re0,A0.3 + LSL A0.3,D1Ar3,#31 + LSR D0Ar4,D0Ar4,#1 + LSR D1Ar3,D1Ar3,#1 + OR D0Ar4,D0Ar4,A0.3 + ORS A0.3,D1Re0,D0Re0 + BNE $L7 +$L10: + MOV D0Re0,D0Ar6 + MOV D1Re0,D1Ar5 + MOV PC,D1RtP + .size _div_u64,.-_div_u64 + + .text + .global _div_s64 + .type _div_s64,function +_div_s64: + MSETL [A0StP],D0FrT,D0.5 + XOR D0.5,D0Ar2,D0Ar4 + XOR D1.5,D1Ar1,D1Ar3 + TSTT D1Ar1,#HI(0x80000000) + BZ $L25 + + NEGS D0Ar2,D0Ar2 + NEG D1Ar1,D1Ar1 + SUBCS D1Ar1,D1Ar1,#1 +$L25: + TSTT D1Ar3,#HI(0x80000000) + BZ $L27 + + NEGS D0Ar4,D0Ar4 + NEG D1Ar3,D1Ar3 + SUBCS D1Ar3,D1Ar3,#1 +$L27: + CALLR D1RtP,_div_u64 + TSTT D1.5,#HI(0x80000000) + BZ $L29 + + NEGS D0Re0,D0Re0 + NEG D1Re0,D1Re0 + SUBCS D1Re0,D1Re0,#1 +$L29: + + GETL D0FrT,D1RtP,[A0StP+#(-16)] + GETL D0.5,D1.5,[A0StP+#(-8)] + SUB A0StP,A0StP,#16 + MOV PC,D1RtP + .size _div_s64,.-_div_s64 |