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-rw-r--r--arch/sparc/lib/divdi3.S271
1 files changed, 271 insertions, 0 deletions
diff --git a/arch/sparc/lib/divdi3.S b/arch/sparc/lib/divdi3.S
new file mode 100644
index 000000000..a7389409d
--- /dev/null
+++ b/arch/sparc/lib/divdi3.S
@@ -0,0 +1,271 @@
+/* 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)