diff options
Diffstat (limited to 'kernel/arch/sparc/lib/udivdi3.S')
| -rw-r--r-- | kernel/arch/sparc/lib/udivdi3.S | 259 |
1 files changed, 259 insertions, 0 deletions
diff --git a/kernel/arch/sparc/lib/udivdi3.S b/kernel/arch/sparc/lib/udivdi3.S new file mode 100644 index 000000000..24e0a355e --- /dev/null +++ b/kernel/arch/sparc/lib/udivdi3.S @@ -0,0 +1,259 @@ +/* Copyright (C) 1989, 1992, 1993, 1994, 1995 Free Software Foundation, Inc. + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + + .text + .align 4 + .globl __udivdi3 +__udivdi3: + save %sp,-104,%sp + mov %i3,%o3 + cmp %i2,0 + bne .LL40 + mov %i1,%i3 + cmp %o3,%i0 + bleu .LL41 + mov %i3,%o1 + ! Inlined udiv_qrnnd + mov 32,%g1 + subcc %i0,%o3,%g0 +1: bcs 5f + addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb + sub %i0,%o3,%i0 ! this kills msb of n + addx %i0,%i0,%i0 ! so this cannot give carry + subcc %g1,1,%g1 +2: bne 1b + subcc %i0,%o3,%g0 + bcs 3f + addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb + b 3f + sub %i0,%o3,%i0 ! this kills msb of n +4: sub %i0,%o3,%i0 +5: addxcc %i0,%i0,%i0 + bcc 2b + subcc %g1,1,%g1 +! Got carry from n. Subtract next step to cancel this carry. + bne 4b + addcc %o1,%o1,%o1 ! shift n1n0 and a 0-bit in lsb + sub %i0,%o3,%i0 +3: xnor %o1,0,%o1 + ! End of inline udiv_qrnnd + b .LL45 + mov 0,%o2 +.LL41: + cmp %o3,0 + bne .LL77 + mov %i0,%o2 + mov 1,%o0 + mov 0,%o1 + wr %g0, 0, %y + udiv %o0, %o1, %o0 + mov %o0,%o3 + mov %i0,%o2 +.LL77: + mov 0,%o4 + ! Inlined udiv_qrnnd + mov 32,%g1 + subcc %o4,%o3,%g0 +1: bcs 5f + addxcc %o2,%o2,%o2 ! shift n1n0 and a q-bit in lsb + sub %o4,%o3,%o4 ! this kills msb of n + addx %o4,%o4,%o4 ! so this cannot give carry + subcc %g1,1,%g1 +2: bne 1b + subcc %o4,%o3,%g0 + bcs 3f + addxcc %o2,%o2,%o2 ! shift n1n0 and a q-bit in lsb + b 3f + sub %o4,%o3,%o4 ! this kills msb of n +4: sub %o4,%o3,%o4 +5: addxcc %o4,%o4,%o4 + bcc 2b + subcc %g1,1,%g1 +! Got carry from n. Subtract next step to cancel this carry. + bne 4b + addcc %o2,%o2,%o2 ! shift n1n0 and a 0-bit in lsb + sub %o4,%o3,%o4 +3: xnor %o2,0,%o2 + ! End of inline udiv_qrnnd + mov %o4,%i0 + mov %i3,%o1 + ! Inlined udiv_qrnnd + mov 32,%g1 + subcc %i0,%o3,%g0 +1: bcs 5f + addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb + sub %i0,%o3,%i0 ! this kills msb of n + addx %i0,%i0,%i0 ! so this cannot give carry + subcc %g1,1,%g1 +2: bne 1b + subcc %i0,%o3,%g0 + bcs 3f + addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb + b 3f + sub %i0,%o3,%i0 ! this kills msb of n +4: sub %i0,%o3,%i0 +5: addxcc %i0,%i0,%i0 + bcc 2b + subcc %g1,1,%g1 +! Got carry from n. Subtract next step to cancel this carry. + bne 4b + addcc %o1,%o1,%o1 ! shift n1n0 and a 0-bit in lsb + sub %i0,%o3,%i0 +3: xnor %o1,0,%o1 + ! End of inline udiv_qrnnd + b .LL78 + mov %o1,%l1 +.LL40: + cmp %i2,%i0 + bleu .LL46 + sethi %hi(65535),%o0 + b .LL73 + mov 0,%o1 +.LL46: + or %o0,%lo(65535),%o0 + cmp %i2,%o0 + bgu .LL53 + mov %i2,%o1 + cmp %i2,256 + addx %g0,-1,%o0 + b .LL59 + and %o0,8,%o2 +.LL53: + sethi %hi(16777215),%o0 + or %o0,%lo(16777215),%o0 + cmp %o1,%o0 + bgu .LL59 + mov 24,%o2 + mov 16,%o2 +.LL59: + srl %o1,%o2,%o1 + sethi %hi(__clz_tab),%o0 + or %o0,%lo(__clz_tab),%o0 + ldub [%o1+%o0],%o0 + add %o0,%o2,%o0 + mov 32,%o1 + subcc %o1,%o0,%o2 + bne,a .LL67 + mov 32,%o0 + cmp %i0,%i2 + bgu .LL69 + cmp %i3,%o3 + blu .LL73 + mov 0,%o1 +.LL69: + b .LL73 + mov 1,%o1 +.LL67: + sub %o0,%o2,%o0 + sll %i2,%o2,%i2 + srl %o3,%o0,%o1 + or %i2,%o1,%i2 + sll %o3,%o2,%o3 + srl %i0,%o0,%o1 + sll %i0,%o2,%i0 + srl %i3,%o0,%o0 + or %i0,%o0,%i0 + sll %i3,%o2,%i3 + mov %i0,%o5 + mov %o1,%o4 + ! Inlined udiv_qrnnd + mov 32,%g1 + subcc %o4,%i2,%g0 +1: bcs 5f + addxcc %o5,%o5,%o5 ! shift n1n0 and a q-bit in lsb + sub %o4,%i2,%o4 ! this kills msb of n + addx %o4,%o4,%o4 ! so this cannot give carry + subcc %g1,1,%g1 +2: bne 1b + subcc %o4,%i2,%g0 + bcs 3f + addxcc %o5,%o5,%o5 ! shift n1n0 and a q-bit in lsb + b 3f + sub %o4,%i2,%o4 ! this kills msb of n +4: sub %o4,%i2,%o4 +5: addxcc %o4,%o4,%o4 + bcc 2b + subcc %g1,1,%g1 +! Got carry from n. Subtract next step to cancel this carry. + bne 4b + addcc %o5,%o5,%o5 ! shift n1n0 and a 0-bit in lsb + sub %o4,%i2,%o4 +3: xnor %o5,0,%o5 + ! End of inline udiv_qrnnd + mov %o4,%i0 + mov %o5,%o1 + ! Inlined umul_ppmm + wr %g0,%o1,%y ! SPARC has 0-3 delay insn after a wr + sra %o3,31,%g2 ! Do not move this insn + and %o1,%g2,%g2 ! Do not move this insn + andcc %g0,0,%g1 ! Do not move this insn + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,%o3,%g1 + mulscc %g1,0,%g1 + add %g1,%g2,%o0 + rd %y,%o2 + cmp %o0,%i0 + bgu,a .LL73 + add %o1,-1,%o1 + bne,a .LL45 + mov 0,%o2 + cmp %o2,%i3 + bleu .LL45 + mov 0,%o2 + add %o1,-1,%o1 +.LL73: + mov 0,%o2 +.LL45: + mov %o1,%l1 +.LL78: + mov %o2,%l0 + mov %l0,%i0 + mov %l1,%i1 + ret + restore |