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annotate src/zlib-1.2.7/contrib/masmx64/inffasx64.asm @ 108:1813f30f2f15

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Update Vamp plugin SDK to 2.5
author Chris Cannam <cannam@all-day-breakfast.com>
date Thu, 09 May 2013 10:52:46 +0100
parents 8a15ff55d9af
children
rev   line source
cannam@89 1 ; inffasx64.asm is a hand tuned assembler version of inffast.c - fast decoding
cannam@89 2 ; version for AMD64 on Windows using Microsoft C compiler
cannam@89 3 ;
cannam@89 4 ; inffasx64.asm is automatically convert from AMD64 portion of inffas86.c
cannam@89 5 ; inffasx64.asm is called by inffas8664.c, which contain more info.
cannam@89 6
cannam@89 7
cannam@89 8 ; to compile this file, I use option
cannam@89 9 ; ml64.exe /Flinffasx64 /c /Zi inffasx64.asm
cannam@89 10 ; with Microsoft Macro Assembler (x64) for AMD64
cannam@89 11 ;
cannam@89 12
cannam@89 13 ; This file compile with Microsoft Macro Assembler (x64) for AMD64
cannam@89 14 ;
cannam@89 15 ; ml64.exe is given with Visual Studio 2005/2008/2010 and Windows WDK
cannam@89 16 ;
cannam@89 17 ; (you can get Windows WDK with ml64 for AMD64 from
cannam@89 18 ; http://www.microsoft.com/whdc/Devtools/wdk/default.mspx for low price)
cannam@89 19 ;
cannam@89 20
cannam@89 21
cannam@89 22 .code
cannam@89 23 inffas8664fnc PROC
cannam@89 24
cannam@89 25 ; see http://weblogs.asp.net/oldnewthing/archive/2004/01/14/58579.aspx and
cannam@89 26 ; http://msdn.microsoft.com/library/en-us/kmarch/hh/kmarch/64bitAMD_8e951dd2-ee77-4728-8702-55ce4b5dd24a.xml.asp
cannam@89 27 ;
cannam@89 28 ; All registers must be preserved across the call, except for
cannam@89 29 ; rax, rcx, rdx, r8, r-9, r10, and r11, which are scratch.
cannam@89 30
cannam@89 31
cannam@89 32 mov [rsp-8],rsi
cannam@89 33 mov [rsp-16],rdi
cannam@89 34 mov [rsp-24],r12
cannam@89 35 mov [rsp-32],r13
cannam@89 36 mov [rsp-40],r14
cannam@89 37 mov [rsp-48],r15
cannam@89 38 mov [rsp-56],rbx
cannam@89 39
cannam@89 40 mov rax,rcx
cannam@89 41
cannam@89 42 mov [rax+8], rbp ; /* save regs rbp and rsp */
cannam@89 43 mov [rax], rsp
cannam@89 44
cannam@89 45 mov rsp, rax ; /* make rsp point to &ar */
cannam@89 46
cannam@89 47 mov rsi, [rsp+16] ; /* rsi = in */
cannam@89 48 mov rdi, [rsp+32] ; /* rdi = out */
cannam@89 49 mov r9, [rsp+24] ; /* r9 = last */
cannam@89 50 mov r10, [rsp+48] ; /* r10 = end */
cannam@89 51 mov rbp, [rsp+64] ; /* rbp = lcode */
cannam@89 52 mov r11, [rsp+72] ; /* r11 = dcode */
cannam@89 53 mov rdx, [rsp+80] ; /* rdx = hold */
cannam@89 54 mov ebx, [rsp+88] ; /* ebx = bits */
cannam@89 55 mov r12d, [rsp+100] ; /* r12d = lmask */
cannam@89 56 mov r13d, [rsp+104] ; /* r13d = dmask */
cannam@89 57 ; /* r14d = len */
cannam@89 58 ; /* r15d = dist */
cannam@89 59
cannam@89 60
cannam@89 61 cld
cannam@89 62 cmp r10, rdi
cannam@89 63 je L_one_time ; /* if only one decode left */
cannam@89 64 cmp r9, rsi
cannam@89 65
cannam@89 66 jne L_do_loop
cannam@89 67
cannam@89 68
cannam@89 69 L_one_time:
cannam@89 70 mov r8, r12 ; /* r8 = lmask */
cannam@89 71 cmp bl, 32
cannam@89 72 ja L_get_length_code_one_time
cannam@89 73
cannam@89 74 lodsd ; /* eax = *(uint *)in++ */
cannam@89 75 mov cl, bl ; /* cl = bits, needs it for shifting */
cannam@89 76 add bl, 32 ; /* bits += 32 */
cannam@89 77 shl rax, cl
cannam@89 78 or rdx, rax ; /* hold |= *((uint *)in)++ << bits */
cannam@89 79 jmp L_get_length_code_one_time
cannam@89 80
cannam@89 81 ALIGN 4
cannam@89 82 L_while_test:
cannam@89 83 cmp r10, rdi
cannam@89 84 jbe L_break_loop
cannam@89 85 cmp r9, rsi
cannam@89 86 jbe L_break_loop
cannam@89 87
cannam@89 88 L_do_loop:
cannam@89 89 mov r8, r12 ; /* r8 = lmask */
cannam@89 90 cmp bl, 32
cannam@89 91 ja L_get_length_code ; /* if (32 < bits) */
cannam@89 92
cannam@89 93 lodsd ; /* eax = *(uint *)in++ */
cannam@89 94 mov cl, bl ; /* cl = bits, needs it for shifting */
cannam@89 95 add bl, 32 ; /* bits += 32 */
cannam@89 96 shl rax, cl
cannam@89 97 or rdx, rax ; /* hold |= *((uint *)in)++ << bits */
cannam@89 98
cannam@89 99 L_get_length_code:
cannam@89 100 and r8, rdx ; /* r8 &= hold */
cannam@89 101 mov eax, [rbp+r8*4] ; /* eax = lcode[hold & lmask] */
cannam@89 102
cannam@89 103 mov cl, ah ; /* cl = this.bits */
cannam@89 104 sub bl, ah ; /* bits -= this.bits */
cannam@89 105 shr rdx, cl ; /* hold >>= this.bits */
cannam@89 106
cannam@89 107 test al, al
cannam@89 108 jnz L_test_for_length_base ; /* if (op != 0) 45.7% */
cannam@89 109
cannam@89 110 mov r8, r12 ; /* r8 = lmask */
cannam@89 111 shr eax, 16 ; /* output this.val char */
cannam@89 112 stosb
cannam@89 113
cannam@89 114 L_get_length_code_one_time:
cannam@89 115 and r8, rdx ; /* r8 &= hold */
cannam@89 116 mov eax, [rbp+r8*4] ; /* eax = lcode[hold & lmask] */
cannam@89 117
cannam@89 118 L_dolen:
cannam@89 119 mov cl, ah ; /* cl = this.bits */
cannam@89 120 sub bl, ah ; /* bits -= this.bits */
cannam@89 121 shr rdx, cl ; /* hold >>= this.bits */
cannam@89 122
cannam@89 123 test al, al
cannam@89 124 jnz L_test_for_length_base ; /* if (op != 0) 45.7% */
cannam@89 125
cannam@89 126 shr eax, 16 ; /* output this.val char */
cannam@89 127 stosb
cannam@89 128 jmp L_while_test
cannam@89 129
cannam@89 130 ALIGN 4
cannam@89 131 L_test_for_length_base:
cannam@89 132 mov r14d, eax ; /* len = this */
cannam@89 133 shr r14d, 16 ; /* len = this.val */
cannam@89 134 mov cl, al
cannam@89 135
cannam@89 136 test al, 16
cannam@89 137 jz L_test_for_second_level_length ; /* if ((op & 16) == 0) 8% */
cannam@89 138 and cl, 15 ; /* op &= 15 */
cannam@89 139 jz L_decode_distance ; /* if (!op) */
cannam@89 140
cannam@89 141 L_add_bits_to_len:
cannam@89 142 sub bl, cl
cannam@89 143 xor eax, eax
cannam@89 144 inc eax
cannam@89 145 shl eax, cl
cannam@89 146 dec eax
cannam@89 147 and eax, edx ; /* eax &= hold */
cannam@89 148 shr rdx, cl
cannam@89 149 add r14d, eax ; /* len += hold & mask[op] */
cannam@89 150
cannam@89 151 L_decode_distance:
cannam@89 152 mov r8, r13 ; /* r8 = dmask */
cannam@89 153 cmp bl, 32
cannam@89 154 ja L_get_distance_code ; /* if (32 < bits) */
cannam@89 155
cannam@89 156 lodsd ; /* eax = *(uint *)in++ */
cannam@89 157 mov cl, bl ; /* cl = bits, needs it for shifting */
cannam@89 158 add bl, 32 ; /* bits += 32 */
cannam@89 159 shl rax, cl
cannam@89 160 or rdx, rax ; /* hold |= *((uint *)in)++ << bits */
cannam@89 161
cannam@89 162 L_get_distance_code:
cannam@89 163 and r8, rdx ; /* r8 &= hold */
cannam@89 164 mov eax, [r11+r8*4] ; /* eax = dcode[hold & dmask] */
cannam@89 165
cannam@89 166 L_dodist:
cannam@89 167 mov r15d, eax ; /* dist = this */
cannam@89 168 shr r15d, 16 ; /* dist = this.val */
cannam@89 169 mov cl, ah
cannam@89 170 sub bl, ah ; /* bits -= this.bits */
cannam@89 171 shr rdx, cl ; /* hold >>= this.bits */
cannam@89 172 mov cl, al ; /* cl = this.op */
cannam@89 173
cannam@89 174 test al, 16 ; /* if ((op & 16) == 0) */
cannam@89 175 jz L_test_for_second_level_dist
cannam@89 176 and cl, 15 ; /* op &= 15 */
cannam@89 177 jz L_check_dist_one
cannam@89 178
cannam@89 179 L_add_bits_to_dist:
cannam@89 180 sub bl, cl
cannam@89 181 xor eax, eax
cannam@89 182 inc eax
cannam@89 183 shl eax, cl
cannam@89 184 dec eax ; /* (1 << op) - 1 */
cannam@89 185 and eax, edx ; /* eax &= hold */
cannam@89 186 shr rdx, cl
cannam@89 187 add r15d, eax ; /* dist += hold & ((1 << op) - 1) */
cannam@89 188
cannam@89 189 L_check_window:
cannam@89 190 mov r8, rsi ; /* save in so from can use it's reg */
cannam@89 191 mov rax, rdi
cannam@89 192 sub rax, [rsp+40] ; /* nbytes = out - beg */
cannam@89 193
cannam@89 194 cmp eax, r15d
cannam@89 195 jb L_clip_window ; /* if (dist > nbytes) 4.2% */
cannam@89 196
cannam@89 197 mov ecx, r14d ; /* ecx = len */
cannam@89 198 mov rsi, rdi
cannam@89 199 sub rsi, r15 ; /* from = out - dist */
cannam@89 200
cannam@89 201 sar ecx, 1
cannam@89 202 jnc L_copy_two ; /* if len % 2 == 0 */
cannam@89 203
cannam@89 204 rep movsw
cannam@89 205 mov al, [rsi]
cannam@89 206 mov [rdi], al
cannam@89 207 inc rdi
cannam@89 208
cannam@89 209 mov rsi, r8 ; /* move in back to %rsi, toss from */
cannam@89 210 jmp L_while_test
cannam@89 211
cannam@89 212 L_copy_two:
cannam@89 213 rep movsw
cannam@89 214 mov rsi, r8 ; /* move in back to %rsi, toss from */
cannam@89 215 jmp L_while_test
cannam@89 216
cannam@89 217 ALIGN 4
cannam@89 218 L_check_dist_one:
cannam@89 219 cmp r15d, 1 ; /* if dist 1, is a memset */
cannam@89 220 jne L_check_window
cannam@89 221 cmp [rsp+40], rdi ; /* if out == beg, outside window */
cannam@89 222 je L_check_window
cannam@89 223
cannam@89 224 mov ecx, r14d ; /* ecx = len */
cannam@89 225 mov al, [rdi-1]
cannam@89 226 mov ah, al
cannam@89 227
cannam@89 228 sar ecx, 1
cannam@89 229 jnc L_set_two
cannam@89 230 mov [rdi], al
cannam@89 231 inc rdi
cannam@89 232
cannam@89 233 L_set_two:
cannam@89 234 rep stosw
cannam@89 235 jmp L_while_test
cannam@89 236
cannam@89 237 ALIGN 4
cannam@89 238 L_test_for_second_level_length:
cannam@89 239 test al, 64
cannam@89 240 jnz L_test_for_end_of_block ; /* if ((op & 64) != 0) */
cannam@89 241
cannam@89 242 xor eax, eax
cannam@89 243 inc eax
cannam@89 244 shl eax, cl
cannam@89 245 dec eax
cannam@89 246 and eax, edx ; /* eax &= hold */
cannam@89 247 add eax, r14d ; /* eax += len */
cannam@89 248 mov eax, [rbp+rax*4] ; /* eax = lcode[val+(hold&mask[op])]*/
cannam@89 249 jmp L_dolen
cannam@89 250
cannam@89 251 ALIGN 4
cannam@89 252 L_test_for_second_level_dist:
cannam@89 253 test al, 64
cannam@89 254 jnz L_invalid_distance_code ; /* if ((op & 64) != 0) */
cannam@89 255
cannam@89 256 xor eax, eax
cannam@89 257 inc eax
cannam@89 258 shl eax, cl
cannam@89 259 dec eax
cannam@89 260 and eax, edx ; /* eax &= hold */
cannam@89 261 add eax, r15d ; /* eax += dist */
cannam@89 262 mov eax, [r11+rax*4] ; /* eax = dcode[val+(hold&mask[op])]*/
cannam@89 263 jmp L_dodist
cannam@89 264
cannam@89 265 ALIGN 4
cannam@89 266 L_clip_window:
cannam@89 267 mov ecx, eax ; /* ecx = nbytes */
cannam@89 268 mov eax, [rsp+92] ; /* eax = wsize, prepare for dist cmp */
cannam@89 269 neg ecx ; /* nbytes = -nbytes */
cannam@89 270
cannam@89 271 cmp eax, r15d
cannam@89 272 jb L_invalid_distance_too_far ; /* if (dist > wsize) */
cannam@89 273
cannam@89 274 add ecx, r15d ; /* nbytes = dist - nbytes */
cannam@89 275 cmp dword ptr [rsp+96], 0
cannam@89 276 jne L_wrap_around_window ; /* if (write != 0) */
cannam@89 277
cannam@89 278 mov rsi, [rsp+56] ; /* from = window */
cannam@89 279 sub eax, ecx ; /* eax -= nbytes */
cannam@89 280 add rsi, rax ; /* from += wsize - nbytes */
cannam@89 281
cannam@89 282 mov eax, r14d ; /* eax = len */
cannam@89 283 cmp r14d, ecx
cannam@89 284 jbe L_do_copy ; /* if (nbytes >= len) */
cannam@89 285
cannam@89 286 sub eax, ecx ; /* eax -= nbytes */
cannam@89 287 rep movsb
cannam@89 288 mov rsi, rdi
cannam@89 289 sub rsi, r15 ; /* from = &out[ -dist ] */
cannam@89 290 jmp L_do_copy
cannam@89 291
cannam@89 292 ALIGN 4
cannam@89 293 L_wrap_around_window:
cannam@89 294 mov eax, [rsp+96] ; /* eax = write */
cannam@89 295 cmp ecx, eax
cannam@89 296 jbe L_contiguous_in_window ; /* if (write >= nbytes) */
cannam@89 297
cannam@89 298 mov esi, [rsp+92] ; /* from = wsize */
cannam@89 299 add rsi, [rsp+56] ; /* from += window */
cannam@89 300 add rsi, rax ; /* from += write */
cannam@89 301 sub rsi, rcx ; /* from -= nbytes */
cannam@89 302 sub ecx, eax ; /* nbytes -= write */
cannam@89 303
cannam@89 304 mov eax, r14d ; /* eax = len */
cannam@89 305 cmp eax, ecx
cannam@89 306 jbe L_do_copy ; /* if (nbytes >= len) */
cannam@89 307
cannam@89 308 sub eax, ecx ; /* len -= nbytes */
cannam@89 309 rep movsb
cannam@89 310 mov rsi, [rsp+56] ; /* from = window */
cannam@89 311 mov ecx, [rsp+96] ; /* nbytes = write */
cannam@89 312 cmp eax, ecx
cannam@89 313 jbe L_do_copy ; /* if (nbytes >= len) */
cannam@89 314
cannam@89 315 sub eax, ecx ; /* len -= nbytes */
cannam@89 316 rep movsb
cannam@89 317 mov rsi, rdi
cannam@89 318 sub rsi, r15 ; /* from = out - dist */
cannam@89 319 jmp L_do_copy
cannam@89 320
cannam@89 321 ALIGN 4
cannam@89 322 L_contiguous_in_window:
cannam@89 323 mov rsi, [rsp+56] ; /* rsi = window */
cannam@89 324 add rsi, rax
cannam@89 325 sub rsi, rcx ; /* from += write - nbytes */
cannam@89 326
cannam@89 327 mov eax, r14d ; /* eax = len */
cannam@89 328 cmp eax, ecx
cannam@89 329 jbe L_do_copy ; /* if (nbytes >= len) */
cannam@89 330
cannam@89 331 sub eax, ecx ; /* len -= nbytes */
cannam@89 332 rep movsb
cannam@89 333 mov rsi, rdi
cannam@89 334 sub rsi, r15 ; /* from = out - dist */
cannam@89 335 jmp L_do_copy ; /* if (nbytes >= len) */
cannam@89 336
cannam@89 337 ALIGN 4
cannam@89 338 L_do_copy:
cannam@89 339 mov ecx, eax ; /* ecx = len */
cannam@89 340 rep movsb
cannam@89 341
cannam@89 342 mov rsi, r8 ; /* move in back to %esi, toss from */
cannam@89 343 jmp L_while_test
cannam@89 344
cannam@89 345 L_test_for_end_of_block:
cannam@89 346 test al, 32
cannam@89 347 jz L_invalid_literal_length_code
cannam@89 348 mov dword ptr [rsp+116], 1
cannam@89 349 jmp L_break_loop_with_status
cannam@89 350
cannam@89 351 L_invalid_literal_length_code:
cannam@89 352 mov dword ptr [rsp+116], 2
cannam@89 353 jmp L_break_loop_with_status
cannam@89 354
cannam@89 355 L_invalid_distance_code:
cannam@89 356 mov dword ptr [rsp+116], 3
cannam@89 357 jmp L_break_loop_with_status
cannam@89 358
cannam@89 359 L_invalid_distance_too_far:
cannam@89 360 mov dword ptr [rsp+116], 4
cannam@89 361 jmp L_break_loop_with_status
cannam@89 362
cannam@89 363 L_break_loop:
cannam@89 364 mov dword ptr [rsp+116], 0
cannam@89 365
cannam@89 366 L_break_loop_with_status:
cannam@89 367 ; /* put in, out, bits, and hold back into ar and pop esp */
cannam@89 368 mov [rsp+16], rsi ; /* in */
cannam@89 369 mov [rsp+32], rdi ; /* out */
cannam@89 370 mov [rsp+88], ebx ; /* bits */
cannam@89 371 mov [rsp+80], rdx ; /* hold */
cannam@89 372
cannam@89 373 mov rax, [rsp] ; /* restore rbp and rsp */
cannam@89 374 mov rbp, [rsp+8]
cannam@89 375 mov rsp, rax
cannam@89 376
cannam@89 377
cannam@89 378
cannam@89 379 mov rsi,[rsp-8]
cannam@89 380 mov rdi,[rsp-16]
cannam@89 381 mov r12,[rsp-24]
cannam@89 382 mov r13,[rsp-32]
cannam@89 383 mov r14,[rsp-40]
cannam@89 384 mov r15,[rsp-48]
cannam@89 385 mov rbx,[rsp-56]
cannam@89 386
cannam@89 387 ret 0
cannam@89 388 ; :
cannam@89 389 ; : "m" (ar)
cannam@89 390 ; : "memory", "%rax", "%rbx", "%rcx", "%rdx", "%rsi", "%rdi",
cannam@89 391 ; "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15"
cannam@89 392 ; );
cannam@89 393
cannam@89 394 inffas8664fnc ENDP
cannam@89 395 ;_TEXT ENDS
cannam@89 396 END