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1 | //------------------------------------------------------------------------------\r |
| 1e57a462 |
2 | //\r |
| 3 | // Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r |
| 4 | //\r |
| 5 | // This program and the accompanying materials\r |
| 6 | // are licensed and made available under the terms and conditions of the BSD License\r |
| 7 | // which accompanies this distribution. The full text of the license may be found at\r |
| 8 | // http://opensource.org/licenses/bsd-license.php\r |
| 9 | //\r |
| 10 | // THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r |
| 11 | // WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r |
| 12 | //\r |
| 13 | //------------------------------------------------------------------------------\r |
| 14 | \r |
| 15 | \r |
| 16 | \r |
| 17 | EXPORT __aeabi_uldivmod\r |
| 18 | \r |
| 19 | AREA Uldivmod, CODE, READONLY\r |
| 20 | \r |
| 3402aac7 |
21 | ;\r |
| 1e57a462 |
22 | ;UINT64\r |
| 23 | ;EFIAPI\r |
| 24 | ;__aeabi_uldivmod (\r |
| 3402aac7 |
25 | ; IN UINT64 Dividend\r |
| 1e57a462 |
26 | ; IN UINT64 Divisor\r |
| 27 | ; )\r |
| 28 | ;\r |
| 29 | __aeabi_uldivmod\r |
| 30 | stmdb sp!, {r4, r5, r6, lr}\r |
| 31 | mov r4, r1\r |
| 32 | mov r5, r0\r |
| 33 | mov r6, #0 ; 0x0\r |
| 34 | orrs ip, r3, r2, lsr #31\r |
| 35 | bne __aeabi_uldivmod_label1\r |
| 36 | tst r2, r2\r |
| 37 | beq _ll_div0\r |
| 38 | movs ip, r2, lsr #15\r |
| 39 | addeq r6, r6, #16 ; 0x10\r |
| 40 | mov ip, r2, lsl r6\r |
| 41 | movs lr, ip, lsr #23\r |
| 42 | moveq ip, ip, lsl #8\r |
| 43 | addeq r6, r6, #8 ; 0x8\r |
| 44 | movs lr, ip, lsr #27\r |
| 45 | moveq ip, ip, lsl #4\r |
| 46 | addeq r6, r6, #4 ; 0x4\r |
| 47 | movs lr, ip, lsr #29\r |
| 48 | moveq ip, ip, lsl #2\r |
| 49 | addeq r6, r6, #2 ; 0x2\r |
| 50 | movs lr, ip, lsr #30\r |
| 51 | moveq ip, ip, lsl #1\r |
| 52 | addeq r6, r6, #1 ; 0x1\r |
| 53 | b _ll_udiv_small\r |
| 54 | __aeabi_uldivmod_label1\r |
| 55 | tst r3, #-2147483648 ; 0x80000000\r |
| 56 | bne __aeabi_uldivmod_label2\r |
| 57 | movs ip, r3, lsr #15\r |
| 58 | addeq r6, r6, #16 ; 0x10\r |
| 59 | mov ip, r3, lsl r6\r |
| 60 | movs lr, ip, lsr #23\r |
| 61 | moveq ip, ip, lsl #8\r |
| 62 | addeq r6, r6, #8 ; 0x8\r |
| 63 | movs lr, ip, lsr #27\r |
| 64 | moveq ip, ip, lsl #4\r |
| 65 | addeq r6, r6, #4 ; 0x4\r |
| 66 | movs lr, ip, lsr #29\r |
| 67 | moveq ip, ip, lsl #2\r |
| 68 | addeq r6, r6, #2 ; 0x2\r |
| 69 | movs lr, ip, lsr #30\r |
| 70 | addeq r6, r6, #1 ; 0x1\r |
| 71 | rsb r3, r6, #32 ; 0x20\r |
| 72 | moveq ip, ip, lsl #1\r |
| 73 | orr ip, ip, r2, lsr r3\r |
| 74 | mov lr, r2, lsl r6\r |
| 75 | b _ll_udiv_big\r |
| 76 | __aeabi_uldivmod_label2\r |
| 77 | mov ip, r3\r |
| 78 | mov lr, r2\r |
| 79 | b _ll_udiv_ginormous\r |
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80 | \r |
| 1e57a462 |
81 | _ll_udiv_small\r |
| 82 | cmp r4, ip, lsl #1\r |
| 83 | mov r3, #0 ; 0x0\r |
| 84 | subcs r4, r4, ip, lsl #1\r |
| 85 | addcs r3, r3, #2 ; 0x2\r |
| 86 | cmp r4, ip\r |
| 87 | subcs r4, r4, ip\r |
| 88 | adcs r3, r3, #0 ; 0x0\r |
| 89 | add r2, r6, #32 ; 0x20\r |
| 90 | cmp r2, #32 ; 0x20\r |
| 91 | rsb ip, ip, #0 ; 0x0\r |
| 92 | bcc _ll_udiv_small_label1\r |
| 93 | orrs r0, r4, r5, lsr #30\r |
| 94 | moveq r4, r5\r |
| 95 | moveq r5, #0 ; 0x0\r |
| 96 | subeq r2, r2, #32 ; 0x20\r |
| 97 | _ll_udiv_small_label1\r |
| 98 | mov r1, #0 ; 0x0\r |
| 99 | cmp r2, #16 ; 0x10\r |
| 100 | bcc _ll_udiv_small_label2\r |
| 101 | movs r0, r4, lsr #14\r |
| 102 | moveq r4, r4, lsl #16\r |
| 103 | addeq r1, r1, #16 ; 0x10\r |
| 104 | _ll_udiv_small_label2\r |
| 105 | sub lr, r2, r1\r |
| 106 | cmp lr, #8 ; 0x8\r |
| 107 | bcc _ll_udiv_small_label3\r |
| 108 | movs r0, r4, lsr #22\r |
| 109 | moveq r4, r4, lsl #8\r |
| 110 | addeq r1, r1, #8 ; 0x8\r |
| 111 | _ll_udiv_small_label3\r |
| 112 | rsb r0, r1, #32 ; 0x20\r |
| 113 | sub r2, r2, r1\r |
| 114 | orr r4, r4, r5, lsr r0\r |
| 115 | mov r5, r5, lsl r1\r |
| 116 | cmp r2, #1 ; 0x1\r |
| 117 | bcc _ll_udiv_small_label5\r |
| 118 | sub r2, r2, #1 ; 0x1\r |
| 119 | and r0, r2, #7 ; 0x7\r |
| 120 | eor r0, r0, #7 ; 0x7\r |
| 121 | adds r0, r0, r0, lsl #1\r |
| 122 | add pc, pc, r0, lsl #2\r |
| 123 | nop ; (mov r0,r0)\r |
| 124 | _ll_udiv_small_label4\r |
| 125 | adcs r5, r5, r5\r |
| 126 | adcs r4, ip, r4, lsl #1\r |
| 127 | rsbcc r4, ip, r4\r |
| 128 | adcs r5, r5, r5\r |
| 129 | adcs r4, ip, r4, lsl #1\r |
| 130 | rsbcc r4, ip, r4\r |
| 131 | adcs r5, r5, r5\r |
| 132 | adcs r4, ip, r4, lsl #1\r |
| 133 | rsbcc r4, ip, r4\r |
| 134 | adcs r5, r5, r5\r |
| 135 | adcs r4, ip, r4, lsl #1\r |
| 136 | rsbcc r4, ip, r4\r |
| 137 | adcs r5, r5, r5\r |
| 138 | adcs r4, ip, r4, lsl #1\r |
| 139 | rsbcc r4, ip, r4\r |
| 140 | adcs r5, r5, r5\r |
| 141 | adcs r4, ip, r4, lsl #1\r |
| 142 | rsbcc r4, ip, r4\r |
| 143 | adcs r5, r5, r5\r |
| 144 | adcs r4, ip, r4, lsl #1\r |
| 145 | rsbcc r4, ip, r4\r |
| 146 | adcs r5, r5, r5\r |
| 147 | adcs r4, ip, r4, lsl #1\r |
| 148 | sub r2, r2, #8 ; 0x8\r |
| 149 | tst r2, r2\r |
| 150 | rsbcc r4, ip, r4\r |
| 151 | bpl _ll_udiv_small_label4\r |
| 152 | _ll_udiv_small_label5\r |
| 153 | mov r2, r4, lsr r6\r |
| 154 | bic r4, r4, r2, lsl r6\r |
| 155 | adcs r0, r5, r5\r |
| 156 | adc r1, r4, r4\r |
| 157 | add r1, r1, r3, lsl r6\r |
| 158 | mov r3, #0 ; 0x0\r |
| 159 | ldmia sp!, {r4, r5, r6, pc}\r |
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160 | \r |
| 1e57a462 |
161 | _ll_udiv_big\r |
| 162 | subs r0, r5, lr\r |
| 163 | mov r3, #0 ; 0x0\r |
| 164 | sbcs r1, r4, ip\r |
| 165 | movcs r5, r0\r |
| 166 | movcs r4, r1\r |
| 167 | adcs r3, r3, #0 ; 0x0\r |
| 168 | subs r0, r5, lr\r |
| 169 | sbcs r1, r4, ip\r |
| 170 | movcs r5, r0\r |
| 171 | movcs r4, r1\r |
| 172 | adcs r3, r3, #0 ; 0x0\r |
| 173 | subs r0, r5, lr\r |
| 174 | sbcs r1, r4, ip\r |
| 175 | movcs r5, r0\r |
| 176 | movcs r4, r1\r |
| 177 | adcs r3, r3, #0 ; 0x0\r |
| 178 | mov r1, #0 ; 0x0\r |
| 179 | rsbs lr, lr, #0 ; 0x0\r |
| 180 | rsc ip, ip, #0 ; 0x0\r |
| 181 | cmp r6, #16 ; 0x10\r |
| 182 | bcc _ll_udiv_big_label1\r |
| 183 | movs r0, r4, lsr #14\r |
| 184 | moveq r4, r4, lsl #16\r |
| 185 | addeq r1, r1, #16 ; 0x10\r |
| 186 | _ll_udiv_big_label1\r |
| 187 | sub r2, r6, r1\r |
| 188 | cmp r2, #8 ; 0x8\r |
| 189 | bcc _ll_udiv_big_label2\r |
| 190 | movs r0, r4, lsr #22\r |
| 191 | moveq r4, r4, lsl #8\r |
| 192 | addeq r1, r1, #8 ; 0x8\r |
| 193 | _ll_udiv_big_label2\r |
| 194 | rsb r0, r1, #32 ; 0x20\r |
| 195 | sub r2, r6, r1\r |
| 196 | orr r4, r4, r5, lsr r0\r |
| 197 | mov r5, r5, lsl r1\r |
| 198 | cmp r2, #1 ; 0x1\r |
| 199 | bcc _ll_udiv_big_label4\r |
| 200 | sub r2, r2, #1 ; 0x1\r |
| 201 | and r0, r2, #3 ; 0x3\r |
| 202 | rsb r0, r0, #3 ; 0x3\r |
| 203 | adds r0, r0, r0, lsl #1\r |
| 204 | add pc, pc, r0, lsl #3\r |
| 205 | nop ; (mov r0,r0)\r |
| 206 | _ll_udiv_big_label3\r |
| 207 | adcs r5, r5, r5\r |
| 208 | adcs r4, r4, r4\r |
| 209 | adcs r0, lr, r5\r |
| 210 | adcs r1, ip, r4\r |
| 211 | movcs r5, r0\r |
| 212 | movcs r4, r1\r |
| 213 | adcs r5, r5, r5\r |
| 214 | adcs r4, r4, r4\r |
| 215 | adcs r0, lr, r5\r |
| 216 | adcs r1, ip, r4\r |
| 217 | movcs r5, r0\r |
| 218 | movcs r4, r1\r |
| 219 | adcs r5, r5, r5\r |
| 220 | adcs r4, r4, r4\r |
| 221 | adcs r0, lr, r5\r |
| 222 | adcs r1, ip, r4\r |
| 223 | movcs r5, r0\r |
| 224 | movcs r4, r1\r |
| 225 | sub r2, r2, #4 ; 0x4\r |
| 226 | adcs r5, r5, r5\r |
| 227 | adcs r4, r4, r4\r |
| 228 | adcs r0, lr, r5\r |
| 229 | adcs r1, ip, r4\r |
| 230 | tst r2, r2\r |
| 231 | movcs r5, r0\r |
| 232 | movcs r4, r1\r |
| 233 | bpl _ll_udiv_big_label3\r |
| 234 | _ll_udiv_big_label4\r |
| 235 | mov r1, #0 ; 0x0\r |
| 236 | mov r2, r5, lsr r6\r |
| 237 | bic r5, r5, r2, lsl r6\r |
| 238 | adcs r0, r5, r5\r |
| 239 | adc r1, r1, #0 ; 0x0\r |
| 240 | movs lr, r3, lsl r6\r |
| 241 | mov r3, r4, lsr r6\r |
| 242 | bic r4, r4, r3, lsl r6\r |
| 243 | adc r1, r1, #0 ; 0x0\r |
| 244 | adds r0, r0, lr\r |
| 245 | orr r2, r2, r4, ror r6\r |
| 246 | adc r1, r1, #0 ; 0x0\r |
| 247 | ldmia sp!, {r4, r5, r6, pc}\r |
| 3402aac7 |
248 | \r |
| 1e57a462 |
249 | _ll_udiv_ginormous\r |
| 250 | subs r2, r5, lr\r |
| 251 | mov r1, #0 ; 0x0\r |
| 252 | sbcs r3, r4, ip\r |
| 253 | adc r0, r1, r1\r |
| 254 | movcc r2, r5\r |
| 255 | movcc r3, r4\r |
| 256 | ldmia sp!, {r4, r5, r6, pc}\r |
| 3402aac7 |
257 | \r |
| 1e57a462 |
258 | _ll_div0\r |
| 259 | ldmia sp!, {r4, r5, r6, lr}\r |
| 260 | mov r0, #0 ; 0x0\r |
| 261 | mov r1, #0 ; 0x0\r |
| 262 | b __aeabi_ldiv0\r |
| 3402aac7 |
263 | \r |
| 1e57a462 |
264 | __aeabi_ldiv0\r |
| 265 | BX r14\r |
| 266 | \r |
| 267 | END\r |
| 268 | \r |
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