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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 | /* 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) |