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| /* SPDX-License-Identifier: GPL-2.0-or-later */
| /* Copyright (C) 1989, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
|
| This file is part of GNU CC.
|
| */
|
| #include <asm/export.h>
| .text
| .align 4
| .globl __divdi3
| __divdi3:
| save %sp,-104,%sp
| cmp %i0,0
| bge .LL40
| mov 0,%l4
| mov -1,%l4
| sub %g0,%i1,%o0
| mov %o0,%o5
| subcc %g0,%o0,%g0
| sub %g0,%i0,%o0
| subx %o0,0,%o4
| mov %o4,%i0
| mov %o5,%i1
| .LL40:
| cmp %i2,0
| bge .LL84
| mov %i3,%o4
| xnor %g0,%l4,%l4
| sub %g0,%i3,%o0
| mov %o0,%o3
| subcc %g0,%o0,%g0
| sub %g0,%i2,%o0
| subx %o0,0,%o2
| mov %o2,%i2
| mov %o3,%i3
| mov %i3,%o4
| .LL84:
| cmp %i2,0
| bne .LL45
| mov %i1,%i3
| cmp %o4,%i0
| bleu .LL46
| mov %i3,%o1
| mov 32,%g1
| subcc %i0,%o4,%g0
| 1: bcs 5f
| addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb
| sub %i0,%o4,%i0 ! this kills msb of n
| addx %i0,%i0,%i0 ! so this cannot give carry
| subcc %g1,1,%g1
| 2: bne 1b
| subcc %i0,%o4,%g0
| bcs 3f
| addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb
| b 3f
| sub %i0,%o4,%i0 ! this kills msb of n
| 4: sub %i0,%o4,%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,%o4,%i0
| 3: xnor %o1,0,%o1
| b .LL50
| mov 0,%o2
| .LL46:
| cmp %o4,0
| bne .LL85
| mov %i0,%o2
| mov 1,%o0
| mov 0,%o1
| wr %g0, 0, %y
| udiv %o0, %o1, %o0
| mov %o0,%o4
| mov %i0,%o2
| .LL85:
| mov 0,%g3
| mov 32,%g1
| subcc %g3,%o4,%g0
| 1: bcs 5f
| addxcc %o2,%o2,%o2 ! shift n1n0 and a q-bit in lsb
| sub %g3,%o4,%g3 ! this kills msb of n
| addx %g3,%g3,%g3 ! so this cannot give carry
| subcc %g1,1,%g1
| 2: bne 1b
| subcc %g3,%o4,%g0
| bcs 3f
| addxcc %o2,%o2,%o2 ! shift n1n0 and a q-bit in lsb
| b 3f
| sub %g3,%o4,%g3 ! this kills msb of n
| 4: sub %g3,%o4,%g3
| 5: addxcc %g3,%g3,%g3
| 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 %g3,%o4,%g3
| 3: xnor %o2,0,%o2
| mov %g3,%i0
| mov %i3,%o1
| mov 32,%g1
| subcc %i0,%o4,%g0
| 1: bcs 5f
| addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb
| sub %i0,%o4,%i0 ! this kills msb of n
| addx %i0,%i0,%i0 ! so this cannot give carry
| subcc %g1,1,%g1
| 2: bne 1b
| subcc %i0,%o4,%g0
| bcs 3f
| addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb
| b 3f
| sub %i0,%o4,%i0 ! this kills msb of n
| 4: sub %i0,%o4,%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,%o4,%i0
| 3: xnor %o1,0,%o1
| b .LL86
| mov %o1,%l1
| .LL45:
| cmp %i2,%i0
| bleu .LL51
| sethi %hi(65535),%o0
| b .LL78
| mov 0,%o1
| .LL51:
| or %o0,%lo(65535),%o0
| cmp %i2,%o0
| bgu .LL58
| mov %i2,%o1
| cmp %i2,256
| addx %g0,-1,%o0
| b .LL64
| and %o0,8,%o2
| .LL58:
| sethi %hi(16777215),%o0
| or %o0,%lo(16777215),%o0
| cmp %i2,%o0
| bgu .LL64
| mov 24,%o2
| mov 16,%o2
| .LL64:
| srl %o1,%o2,%o0
| sethi %hi(__clz_tab),%o1
| or %o1,%lo(__clz_tab),%o1
| ldub [%o0+%o1],%o0
| add %o0,%o2,%o0
| mov 32,%o1
| subcc %o1,%o0,%o3
| bne,a .LL72
| sub %o1,%o3,%o1
| cmp %i0,%i2
| bgu .LL74
| cmp %i3,%o4
| blu .LL78
| mov 0,%o1
| .LL74:
| b .LL78
| mov 1,%o1
| .LL72:
| sll %i2,%o3,%o2
| srl %o4,%o1,%o0
| or %o2,%o0,%i2
| sll %o4,%o3,%o4
| srl %i0,%o1,%o2
| sll %i0,%o3,%o0
| srl %i3,%o1,%o1
| or %o0,%o1,%i0
| sll %i3,%o3,%i3
| mov %i0,%o1
| mov 32,%g1
| subcc %o2,%i2,%g0
| 1: bcs 5f
| addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb
| sub %o2,%i2,%o2 ! this kills msb of n
| addx %o2,%o2,%o2 ! so this cannot give carry
| subcc %g1,1,%g1
| 2: bne 1b
| subcc %o2,%i2,%g0
| bcs 3f
| addxcc %o1,%o1,%o1 ! shift n1n0 and a q-bit in lsb
| b 3f
| sub %o2,%i2,%o2 ! this kills msb of n
| 4: sub %o2,%i2,%o2
| 5: addxcc %o2,%o2,%o2
| 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 %o2,%i2,%o2
| 3: xnor %o1,0,%o1
| mov %o2,%i0
| wr %g0,%o1,%y ! SPARC has 0-3 delay insn after a wr
| sra %o4,31,%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,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,%o4,%g1
| mulscc %g1,0,%g1
| add %g1,%g2,%o0
| rd %y,%o2
| cmp %o0,%i0
| bgu,a .LL78
| add %o1,-1,%o1
| bne,a .LL50
| mov 0,%o2
| cmp %o2,%i3
| bleu .LL50
| mov 0,%o2
| add %o1,-1,%o1
| .LL78:
| mov 0,%o2
| .LL50:
| mov %o1,%l1
| .LL86:
| mov %o2,%l0
| mov %l0,%i0
| mov %l1,%i1
| cmp %l4,0
| be .LL81
| sub %g0,%i1,%o0
| mov %o0,%l3
| subcc %g0,%o0,%g0
| sub %g0,%i0,%o0
| subx %o0,0,%l2
| mov %l2,%i0
| mov %l3,%i1
| .LL81:
| ret
| restore
| EXPORT_SYMBOL(__divdi3)
|
|
