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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 | /* csum_copy.S: Checksum+copy code for sparc64 * * Copyright (C) 2005 David S. Miller <davem@davemloft.net> */ #ifdef __KERNEL__ #define GLOBAL_SPARE %g7 #else #define GLOBAL_SPARE %g5 #endif #ifndef EX_LD #define EX_LD(x) x #endif #ifndef EX_ST #define EX_ST(x) x #endif #ifndef EX_RETVAL #define EX_RETVAL(x) x #endif #ifndef LOAD #define LOAD(type,addr,dest) type [addr], dest #endif #ifndef STORE #define STORE(type,src,addr) type src, [addr] #endif #ifndef FUNC_NAME #define FUNC_NAME csum_partial_copy_nocheck #endif .register %g2, #scratch .register %g3, #scratch .text 90: /* We checked for zero length already, so there must be * at least one byte. */ be,pt %icc, 1f nop EX_LD(LOAD(ldub, %o0 + 0x00, %o4)) add %o0, 1, %o0 sub %o2, 1, %o2 EX_ST(STORE(stb, %o4, %o1 + 0x00)) add %o1, 1, %o1 1: andcc %o0, 0x2, %g0 be,pn %icc, 80f cmp %o2, 2 blu,pn %icc, 60f nop EX_LD(LOAD(lduh, %o0 + 0x00, %o5)) add %o0, 2, %o0 sub %o2, 2, %o2 EX_ST(STORE(sth, %o5, %o1 + 0x00)) add %o1, 2, %o1 ba,pt %xcc, 80f add %o5, %o4, %o4 .globl FUNC_NAME FUNC_NAME: /* %o0=src, %o1=dst, %o2=len, %o3=sum */ LOAD(prefetch, %o0 + 0x000, #n_reads) xor %o0, %o1, %g1 clr %o4 andcc %g1, 0x3, %g0 bne,pn %icc, 95f LOAD(prefetch, %o0 + 0x040, #n_reads) brz,pn %o2, 70f andcc %o0, 0x3, %g0 /* We "remember" whether the lowest bit in the address * was set in GLOBAL_SPARE. Because if it is, we have to swap * upper and lower 8 bit fields of the sum we calculate. */ bne,pn %icc, 90b andcc %o0, 0x1, GLOBAL_SPARE 80: LOAD(prefetch, %o0 + 0x080, #n_reads) andncc %o2, 0x3f, %g3 LOAD(prefetch, %o0 + 0x0c0, #n_reads) sub %o2, %g3, %o2 brz,pn %g3, 2f LOAD(prefetch, %o0 + 0x100, #n_reads) /* So that we don't need to use the non-pairing * add-with-carry instructions we accumulate 32-bit * values into a 64-bit register. At the end of the * loop we fold it down to 32-bits and so on. */ ba,pt %xcc, 1f LOAD(prefetch, %o0 + 0x140, #n_reads) .align 32 1: EX_LD(LOAD(lduw, %o0 + 0x00, %o5)) EX_LD(LOAD(lduw, %o0 + 0x04, %g1)) EX_LD(LOAD(lduw, %o0 + 0x08, %g2)) add %o4, %o5, %o4 EX_ST(STORE(stw, %o5, %o1 + 0x00)) EX_LD(LOAD(lduw, %o0 + 0x0c, %o5)) add %o4, %g1, %o4 EX_ST(STORE(stw, %g1, %o1 + 0x04)) EX_LD(LOAD(lduw, %o0 + 0x10, %g1)) add %o4, %g2, %o4 EX_ST(STORE(stw, %g2, %o1 + 0x08)) EX_LD(LOAD(lduw, %o0 + 0x14, %g2)) add %o4, %o5, %o4 EX_ST(STORE(stw, %o5, %o1 + 0x0c)) EX_LD(LOAD(lduw, %o0 + 0x18, %o5)) add %o4, %g1, %o4 EX_ST(STORE(stw, %g1, %o1 + 0x10)) EX_LD(LOAD(lduw, %o0 + 0x1c, %g1)) add %o4, %g2, %o4 EX_ST(STORE(stw, %g2, %o1 + 0x14)) EX_LD(LOAD(lduw, %o0 + 0x20, %g2)) add %o4, %o5, %o4 EX_ST(STORE(stw, %o5, %o1 + 0x18)) EX_LD(LOAD(lduw, %o0 + 0x24, %o5)) add %o4, %g1, %o4 EX_ST(STORE(stw, %g1, %o1 + 0x1c)) EX_LD(LOAD(lduw, %o0 + 0x28, %g1)) add %o4, %g2, %o4 EX_ST(STORE(stw, %g2, %o1 + 0x20)) EX_LD(LOAD(lduw, %o0 + 0x2c, %g2)) add %o4, %o5, %o4 EX_ST(STORE(stw, %o5, %o1 + 0x24)) EX_LD(LOAD(lduw, %o0 + 0x30, %o5)) add %o4, %g1, %o4 EX_ST(STORE(stw, %g1, %o1 + 0x28)) EX_LD(LOAD(lduw, %o0 + 0x34, %g1)) add %o4, %g2, %o4 EX_ST(STORE(stw, %g2, %o1 + 0x2c)) EX_LD(LOAD(lduw, %o0 + 0x38, %g2)) add %o4, %o5, %o4 EX_ST(STORE(stw, %o5, %o1 + 0x30)) EX_LD(LOAD(lduw, %o0 + 0x3c, %o5)) add %o4, %g1, %o4 EX_ST(STORE(stw, %g1, %o1 + 0x34)) LOAD(prefetch, %o0 + 0x180, #n_reads) add %o4, %g2, %o4 EX_ST(STORE(stw, %g2, %o1 + 0x38)) subcc %g3, 0x40, %g3 add %o0, 0x40, %o0 add %o4, %o5, %o4 EX_ST(STORE(stw, %o5, %o1 + 0x3c)) bne,pt %icc, 1b add %o1, 0x40, %o1 2: and %o2, 0x3c, %g3 brz,pn %g3, 2f sub %o2, %g3, %o2 1: EX_LD(LOAD(lduw, %o0 + 0x00, %o5)) subcc %g3, 0x4, %g3 add %o0, 0x4, %o0 add %o4, %o5, %o4 EX_ST(STORE(stw, %o5, %o1 + 0x00)) bne,pt %icc, 1b add %o1, 0x4, %o1 2: /* fold 64-->32 */ srlx %o4, 32, %o5 srl %o4, 0, %o4 add %o4, %o5, %o4 srlx %o4, 32, %o5 srl %o4, 0, %o4 add %o4, %o5, %o4 /* fold 32-->16 */ sethi %hi(0xffff0000), %g1 srl %o4, 16, %o5 andn %o4, %g1, %g2 add %o5, %g2, %o4 srl %o4, 16, %o5 andn %o4, %g1, %g2 add %o5, %g2, %o4 60: /* %o4 has the 16-bit sum we have calculated so-far. */ cmp %o2, 2 blu,pt %icc, 1f nop EX_LD(LOAD(lduh, %o0 + 0x00, %o5)) sub %o2, 2, %o2 add %o0, 2, %o0 add %o4, %o5, %o4 EX_ST(STORE(sth, %o5, %o1 + 0x00)) add %o1, 0x2, %o1 1: brz,pt %o2, 1f nop EX_LD(LOAD(ldub, %o0 + 0x00, %o5)) sub %o2, 1, %o2 add %o0, 1, %o0 EX_ST(STORE(stb, %o5, %o1 + 0x00)) sllx %o5, 8, %o5 add %o1, 1, %o1 add %o4, %o5, %o4 1: /* fold 32-->16 */ sethi %hi(0xffff0000), %g1 srl %o4, 16, %o5 andn %o4, %g1, %g2 add %o5, %g2, %o4 srl %o4, 16, %o5 andn %o4, %g1, %g2 add %o5, %g2, %o4 1: brz,pt GLOBAL_SPARE, 1f nop /* We started with an odd byte, byte-swap the result. */ srl %o4, 8, %o5 and %o4, 0xff, %g1 sll %g1, 8, %g1 or %o5, %g1, %o4 1: addcc %o3, %o4, %o3 addc %g0, %o3, %o3 70: retl srl %o3, 0, %o0 95: mov 0, GLOBAL_SPARE brlez,pn %o2, 4f andcc %o0, 1, %o5 be,a,pt %icc, 1f srl %o2, 1, %g1 sub %o2, 1, %o2 EX_LD(LOAD(ldub, %o0, GLOBAL_SPARE)) add %o0, 1, %o0 EX_ST(STORE(stb, GLOBAL_SPARE, %o1)) srl %o2, 1, %g1 add %o1, 1, %o1 1: brz,a,pn %g1, 3f andcc %o2, 1, %g0 andcc %o0, 2, %g0 be,a,pt %icc, 1f srl %g1, 1, %g1 EX_LD(LOAD(lduh, %o0, %o4)) sub %o2, 2, %o2 srl %o4, 8, %g2 sub %g1, 1, %g1 EX_ST(STORE(stb, %g2, %o1)) add %o4, GLOBAL_SPARE, GLOBAL_SPARE EX_ST(STORE(stb, %o4, %o1 + 1)) add %o0, 2, %o0 srl %g1, 1, %g1 add %o1, 2, %o1 1: brz,a,pn %g1, 2f andcc %o2, 2, %g0 EX_LD(LOAD(lduw, %o0, %o4)) 5: srl %o4, 24, %g2 srl %o4, 16, %g3 EX_ST(STORE(stb, %g2, %o1)) srl %o4, 8, %g2 EX_ST(STORE(stb, %g3, %o1 + 1)) add %o0, 4, %o0 EX_ST(STORE(stb, %g2, %o1 + 2)) addcc %o4, GLOBAL_SPARE, GLOBAL_SPARE EX_ST(STORE(stb, %o4, %o1 + 3)) addc GLOBAL_SPARE, %g0, GLOBAL_SPARE add %o1, 4, %o1 subcc %g1, 1, %g1 bne,a,pt %icc, 5b EX_LD(LOAD(lduw, %o0, %o4)) sll GLOBAL_SPARE, 16, %g2 srl GLOBAL_SPARE, 16, GLOBAL_SPARE srl %g2, 16, %g2 andcc %o2, 2, %g0 add %g2, GLOBAL_SPARE, GLOBAL_SPARE 2: be,a,pt %icc, 3f andcc %o2, 1, %g0 EX_LD(LOAD(lduh, %o0, %o4)) andcc %o2, 1, %g0 srl %o4, 8, %g2 add %o0, 2, %o0 EX_ST(STORE(stb, %g2, %o1)) add GLOBAL_SPARE, %o4, GLOBAL_SPARE EX_ST(STORE(stb, %o4, %o1 + 1)) add %o1, 2, %o1 3: be,a,pt %icc, 1f sll GLOBAL_SPARE, 16, %o4 EX_LD(LOAD(ldub, %o0, %g2)) sll %g2, 8, %o4 EX_ST(STORE(stb, %g2, %o1)) add GLOBAL_SPARE, %o4, GLOBAL_SPARE sll GLOBAL_SPARE, 16, %o4 1: addcc %o4, GLOBAL_SPARE, GLOBAL_SPARE srl GLOBAL_SPARE, 16, %o4 addc %g0, %o4, GLOBAL_SPARE brz,pt %o5, 4f srl GLOBAL_SPARE, 8, %o4 and GLOBAL_SPARE, 0xff, %g2 and %o4, 0xff, %o4 sll %g2, 8, %g2 or %g2, %o4, GLOBAL_SPARE 4: addcc %o3, GLOBAL_SPARE, %o3 addc %g0, %o3, %o0 retl srl %o0, 0, %o0 .size FUNC_NAME, .-FUNC_NAME |