J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 3 | * |
| 4 | * This code is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU General Public License version 2 only, as |
| 6 | * published by the Free Software Foundation. Sun designates this |
| 7 | * particular file as subject to the "Classpath" exception as provided |
| 8 | * by Sun in the LICENSE file that accompanied this code. |
| 9 | * |
| 10 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 13 | * version 2 for more details (a copy is included in the LICENSE file that |
| 14 | * accompanied this code). |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License version |
| 17 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 18 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 19 | * |
| 20 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 21 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 22 | * have any questions. |
| 23 | */ |
| 24 | |
| 25 | /* pnggccrd.c - mixed C/assembler version of utilities to read a PNG file |
| 26 | * |
| 27 | * This file is available under and governed by the GNU General Public |
| 28 | * License version 2 only, as published by the Free Software Foundation. |
| 29 | * However, the following notice accompanied the original version of this |
| 30 | * file and, per its terms, should not be removed: |
| 31 | * |
| 32 | * For Intel x86 CPU (Pentium-MMX or later) and GNU C compiler. |
| 33 | * |
| 34 | * See http://www.intel.com/drg/pentiumII/appnotes/916/916.htm |
| 35 | * and http://www.intel.com/drg/pentiumII/appnotes/923/923.htm |
| 36 | * for Intel's performance analysis of the MMX vs. non-MMX code. |
| 37 | * |
| 38 | * Last changed in libpng 1.2.15 January 5, 2007 |
| 39 | * For conditions of distribution and use, see copyright notice in png.h |
| 40 | * Copyright (c) 1998-2007 Glenn Randers-Pehrson |
| 41 | * Copyright (c) 1998, Intel Corporation |
| 42 | * |
| 43 | * Based on MSVC code contributed by Nirav Chhatrapati, Intel Corp., 1998. |
| 44 | * Interface to libpng contributed by Gilles Vollant, 1999. |
| 45 | * GNU C port by Greg Roelofs, 1999-2001. |
| 46 | * |
| 47 | * Lines 2350-4300 converted in place with intel2gas 1.3.1: |
| 48 | * |
| 49 | * intel2gas -mdI pnggccrd.c.partially-msvc -o pnggccrd.c |
| 50 | * |
| 51 | * and then cleaned up by hand. See http://hermes.terminal.at/intel2gas/ . |
| 52 | * |
| 53 | * NOTE: A sufficiently recent version of GNU as (or as.exe under DOS/Windows) |
| 54 | * is required to assemble the newer MMX instructions such as movq. |
| 55 | * For djgpp, see |
| 56 | * |
| 57 | * ftp://ftp.simtel.net/pub/simtelnet/gnu/djgpp/v2gnu/bnu281b.zip |
| 58 | * |
| 59 | * (or a later version in the same directory). For Linux, check your |
| 60 | * distribution's web site(s) or try these links: |
| 61 | * |
| 62 | * http://rufus.w3.org/linux/RPM/binutils.html |
| 63 | * http://www.debian.org/Packages/stable/devel/binutils.html |
| 64 | * ftp://ftp.slackware.com/pub/linux/slackware/slackware/slakware/d1/ |
| 65 | * binutils.tgz |
| 66 | * |
| 67 | * For other platforms, see the main GNU site: |
| 68 | * |
| 69 | * ftp://ftp.gnu.org/pub/gnu/binutils/ |
| 70 | * |
| 71 | * Version 2.5.2l.15 is definitely too old... |
| 72 | */ |
| 73 | |
| 74 | /* |
| 75 | * TEMPORARY PORTING NOTES AND CHANGELOG (mostly by Greg Roelofs) |
| 76 | * ===================================== |
| 77 | * |
| 78 | * 19991006: |
| 79 | * - fixed sign error in post-MMX cleanup code (16- & 32-bit cases) |
| 80 | * |
| 81 | * 19991007: |
| 82 | * - additional optimizations (possible or definite): |
| 83 | * x [DONE] write MMX code for 64-bit case (pixel_bytes == 8) [not tested] |
| 84 | * - write MMX code for 48-bit case (pixel_bytes == 6) |
| 85 | * - figure out what's up with 24-bit case (pixel_bytes == 3): |
| 86 | * why subtract 8 from width_mmx in the pass 4/5 case? |
| 87 | * (only width_mmx case) (near line 1606) |
| 88 | * x [DONE] replace pixel_bytes within each block with the true |
| 89 | * constant value (or are compilers smart enough to do that?) |
| 90 | * - rewrite all MMX interlacing code so it's aligned with |
| 91 | * the *beginning* of the row buffer, not the end. This |
| 92 | * would not only allow one to eliminate half of the memory |
| 93 | * writes for odd passes (that is, pass == odd), it may also |
| 94 | * eliminate some unaligned-data-access exceptions (assuming |
| 95 | * there's a penalty for not aligning 64-bit accesses on |
| 96 | * 64-bit boundaries). The only catch is that the "leftover" |
| 97 | * pixel(s) at the end of the row would have to be saved, |
| 98 | * but there are enough unused MMX registers in every case, |
| 99 | * so this is not a problem. A further benefit is that the |
| 100 | * post-MMX cleanup code (C code) in at least some of the |
| 101 | * cases could be done within the assembler block. |
| 102 | * x [DONE] the "v3 v2 v1 v0 v7 v6 v5 v4" comments are confusing, |
| 103 | * inconsistent, and don't match the MMX Programmer's Reference |
| 104 | * Manual conventions anyway. They should be changed to |
| 105 | * "b7 b6 b5 b4 b3 b2 b1 b0," where b0 indicates the byte that |
| 106 | * was lowest in memory (e.g., corresponding to a left pixel) |
| 107 | * and b7 is the byte that was highest (e.g., a right pixel). |
| 108 | * |
| 109 | * 19991016: |
| 110 | * - Brennan's Guide notwithstanding, gcc under Linux does *not* |
| 111 | * want globals prefixed by underscores when referencing them-- |
| 112 | * i.e., if the variable is const4, then refer to it as const4, |
| 113 | * not _const4. This seems to be a djgpp-specific requirement. |
| 114 | * Also, such variables apparently *must* be declared outside |
| 115 | * of functions; neither static nor automatic variables work if |
| 116 | * defined within the scope of a single function, but both |
| 117 | * static and truly global (multi-module) variables work fine. |
| 118 | * |
| 119 | * 19991023: |
| 120 | * - fixed png_combine_row() non-MMX replication bug (odd passes only?) |
| 121 | * - switched from string-concatenation-with-macros to cleaner method of |
| 122 | * renaming global variables for djgpp--i.e., always use prefixes in |
| 123 | * inlined assembler code (== strings) and conditionally rename the |
| 124 | * variables, not the other way around. Hence _const4, _mask8_0, etc. |
| 125 | * |
| 126 | * 19991024: |
| 127 | * - fixed mmxsupport()/png_do_read_interlace() first-row bug |
| 128 | * This one was severely weird: even though mmxsupport() doesn't touch |
| 129 | * ebx (where "row" pointer was stored), it nevertheless managed to zero |
| 130 | * the register (even in static/non-fPIC code--see below), which in turn |
| 131 | * caused png_do_read_interlace() to return prematurely on the first row of |
| 132 | * interlaced images (i.e., without expanding the interlaced pixels). |
| 133 | * Inspection of the generated assembly code didn't turn up any clues, |
| 134 | * although it did point at a minor optimization (i.e., get rid of |
| 135 | * mmx_supported_local variable and just use eax). Possibly the CPUID |
| 136 | * instruction is more destructive than it looks? (Not yet checked.) |
| 137 | * - "info gcc" was next to useless, so compared fPIC and non-fPIC assembly |
| 138 | * listings... Apparently register spillage has to do with ebx, since |
| 139 | * it's used to index the global offset table. Commenting it out of the |
| 140 | * input-reg lists in png_combine_row() eliminated compiler barfage, so |
| 141 | * ifdef'd with __PIC__ macro: if defined, use a global for unmask |
| 142 | * |
| 143 | * 19991107: |
| 144 | * - verified CPUID clobberage: 12-char string constant ("GenuineIntel", |
| 145 | * "AuthenticAMD", etc.) placed in ebx:ecx:edx. Still need to polish. |
| 146 | * |
| 147 | * 19991120: |
| 148 | * - made "diff" variable (now "_dif") global to simplify conversion of |
| 149 | * filtering routines (running out of regs, sigh). "diff" is still used |
| 150 | * in interlacing routines, however. |
| 151 | * - fixed up both versions of mmxsupport() (ORIG_THAT_USED_TO_CLOBBER_EBX |
| 152 | * macro determines which is used); original not yet tested. |
| 153 | * |
| 154 | * 20000213: |
| 155 | * - when compiling with gcc, be sure to use -fomit-frame-pointer |
| 156 | * |
| 157 | * 20000319: |
| 158 | * - fixed a register-name typo in png_do_read_interlace(), default (MMX) case, |
| 159 | * pass == 4 or 5, that caused visible corruption of interlaced images |
| 160 | * |
| 161 | * 20000623: |
| 162 | * - Various problems were reported with gcc 2.95.2 in the Cygwin environment, |
| 163 | * many of the form "forbidden register 0 (ax) was spilled for class AREG." |
| 164 | * This is explained at http://gcc.gnu.org/fom_serv/cache/23.html, and |
| 165 | * Chuck Wilson supplied a patch involving dummy output registers. See |
| 166 | * http://sourceforge.net/bugs/?func=detailbug&bug_id=108741&group_id=5624 |
| 167 | * for the original (anonymous) SourceForge bug report. |
| 168 | * |
| 169 | * 20000706: |
| 170 | * - Chuck Wilson passed along these remaining gcc 2.95.2 errors: |
| 171 | * pnggccrd.c: In function `png_combine_row': |
| 172 | * pnggccrd.c:525: more than 10 operands in `asm' |
| 173 | * pnggccrd.c:669: more than 10 operands in `asm' |
| 174 | * pnggccrd.c:828: more than 10 operands in `asm' |
| 175 | * pnggccrd.c:994: more than 10 operands in `asm' |
| 176 | * pnggccrd.c:1177: more than 10 operands in `asm' |
| 177 | * They are all the same problem and can be worked around by using the |
| 178 | * global _unmask variable unconditionally, not just in the -fPIC case. |
| 179 | * Reportedly earlier versions of gcc also have the problem with more than |
| 180 | * 10 operands; they just don't report it. Much strangeness ensues, etc. |
| 181 | * |
| 182 | * 20000729: |
| 183 | * - enabled png_read_filter_row_mmx_up() (shortest remaining unconverted |
| 184 | * MMX routine); began converting png_read_filter_row_mmx_sub() |
| 185 | * - to finish remaining sections: |
| 186 | * - clean up indentation and comments |
| 187 | * - preload local variables |
| 188 | * - add output and input regs (order of former determines numerical |
| 189 | * mapping of latter) |
| 190 | * - avoid all usage of ebx (including bx, bh, bl) register [20000823] |
| 191 | * - remove "$" from addressing of Shift and Mask variables [20000823] |
| 192 | * |
| 193 | * 20000731: |
| 194 | * - global union vars causing segfaults in png_read_filter_row_mmx_sub()? |
| 195 | * |
| 196 | * 20000822: |
| 197 | * - ARGH, stupid png_read_filter_row_mmx_sub() segfault only happens with |
| 198 | * shared-library (-fPIC) version! Code works just fine as part of static |
| 199 | * library. Damn damn damn damn damn, should have tested that sooner. |
| 200 | * ebx is getting clobbered again (explicitly this time); need to save it |
| 201 | * on stack or rewrite asm code to avoid using it altogether. Blargh! |
| 202 | * |
| 203 | * 20000823: |
| 204 | * - first section was trickiest; all remaining sections have ebx -> edx now. |
| 205 | * (-fPIC works again.) Also added missing underscores to various Shift* |
| 206 | * and *Mask* globals and got rid of leading "$" signs. |
| 207 | * |
| 208 | * 20000826: |
| 209 | * - added visual separators to help navigate microscopic printed copies |
| 210 | * (http://pobox.com/~newt/code/gpr-latest.zip, mode 10); started working |
| 211 | * on png_read_filter_row_mmx_avg() |
| 212 | * |
| 213 | * 20000828: |
| 214 | * - finished png_read_filter_row_mmx_avg(): only Paeth left! (930 lines...) |
| 215 | * What the hell, did png_read_filter_row_mmx_paeth(), too. Comments not |
| 216 | * cleaned up/shortened in either routine, but functionality is complete |
| 217 | * and seems to be working fine. |
| 218 | * |
| 219 | * 20000829: |
| 220 | * - ahhh, figured out last(?) bit of gcc/gas asm-fu: if register is listed |
| 221 | * as an input reg (with dummy output variables, etc.), then it *cannot* |
| 222 | * also appear in the clobber list or gcc 2.95.2 will barf. The solution |
| 223 | * is simple enough... |
| 224 | * |
| 225 | * 20000914: |
| 226 | * - bug in png_read_filter_row_mmx_avg(): 16-bit grayscale not handled |
| 227 | * correctly (but 48-bit RGB just fine) |
| 228 | * |
| 229 | * 20000916: |
| 230 | * - fixed bug in png_read_filter_row_mmx_avg(), bpp == 2 case; three errors: |
| 231 | * - "_ShiftBpp.use = 24;" should have been "_ShiftBpp.use = 16;" |
| 232 | * - "_ShiftRem.use = 40;" should have been "_ShiftRem.use = 48;" |
| 233 | * - "psllq _ShiftRem, %%mm2" should have been "psrlq _ShiftRem, %%mm2" |
| 234 | * |
| 235 | * 20010101: |
| 236 | * - added new png_init_mmx_flags() function (here only because it needs to |
| 237 | * call mmxsupport(), which should probably become global png_mmxsupport()); |
| 238 | * modified other MMX routines to run conditionally (png_ptr->asm_flags) |
| 239 | * |
| 240 | * 20010103: |
| 241 | * - renamed mmxsupport() to png_mmx_support(), with auto-set of mmx_supported, |
| 242 | * and made it public; moved png_init_mmx_flags() to png.c as internal func |
| 243 | * |
| 244 | * 20010104: |
| 245 | * - removed dependency on png_read_filter_row_c() (C code already duplicated |
| 246 | * within MMX version of png_read_filter_row()) so no longer necessary to |
| 247 | * compile it into pngrutil.o |
| 248 | * |
| 249 | * 20010310: |
| 250 | * - fixed buffer-overrun bug in png_combine_row() C code (non-MMX) |
| 251 | * |
| 252 | * 20020304: |
| 253 | * - eliminated incorrect use of width_mmx in pixel_bytes == 8 case |
| 254 | * |
| 255 | * 20040724: |
| 256 | * - more tinkering with clobber list at lines 4529 and 5033, to get |
| 257 | * it to compile on gcc-3.4. |
| 258 | * |
| 259 | * STILL TO DO: |
| 260 | * - test png_do_read_interlace() 64-bit case (pixel_bytes == 8) |
| 261 | * - write MMX code for 48-bit case (pixel_bytes == 6) |
| 262 | * - figure out what's up with 24-bit case (pixel_bytes == 3): |
| 263 | * why subtract 8 from width_mmx in the pass 4/5 case? |
| 264 | * (only width_mmx case) (near line 1606) |
| 265 | * - rewrite all MMX interlacing code so it's aligned with beginning |
| 266 | * of the row buffer, not the end (see 19991007 for details) |
| 267 | * x pick one version of mmxsupport() and get rid of the other |
| 268 | * - add error messages to any remaining bogus default cases |
| 269 | * - enable pixel_depth == 8 cases in png_read_filter_row()? (test speed) |
| 270 | * x add support for runtime enable/disable/query of various MMX routines |
| 271 | */ |
| 272 | |
| 273 | #define PNG_INTERNAL |
| 274 | #include "png.h" |
| 275 | |
| 276 | #if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_USE_PNGGCCRD) |
| 277 | |
| 278 | int PNGAPI png_mmx_support(void); |
| 279 | |
| 280 | #ifdef PNG_USE_LOCAL_ARRAYS |
| 281 | const static int FARDATA png_pass_start[7] = {0, 4, 0, 2, 0, 1, 0}; |
| 282 | const static int FARDATA png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; |
| 283 | const static int FARDATA png_pass_width[7] = {8, 4, 4, 2, 2, 1, 1}; |
| 284 | #endif |
| 285 | |
| 286 | #if defined(PNG_MMX_CODE_SUPPORTED) |
| 287 | /* djgpp, Win32, Cygwin, and OS2 add their own underscores to global variables, |
| 288 | * so define them without: */ |
| 289 | #if defined(__DJGPP__) || defined(WIN32) || defined(__CYGWIN__) || \ |
| 290 | defined(__OS2__) |
| 291 | # define _mmx_supported mmx_supported |
| 292 | # define _const4 const4 |
| 293 | # define _const6 const6 |
| 294 | # define _mask8_0 mask8_0 |
| 295 | # define _mask16_1 mask16_1 |
| 296 | # define _mask16_0 mask16_0 |
| 297 | # define _mask24_2 mask24_2 |
| 298 | # define _mask24_1 mask24_1 |
| 299 | # define _mask24_0 mask24_0 |
| 300 | # define _mask32_3 mask32_3 |
| 301 | # define _mask32_2 mask32_2 |
| 302 | # define _mask32_1 mask32_1 |
| 303 | # define _mask32_0 mask32_0 |
| 304 | # define _mask48_5 mask48_5 |
| 305 | # define _mask48_4 mask48_4 |
| 306 | # define _mask48_3 mask48_3 |
| 307 | # define _mask48_2 mask48_2 |
| 308 | # define _mask48_1 mask48_1 |
| 309 | # define _mask48_0 mask48_0 |
| 310 | # define _LBCarryMask LBCarryMask |
| 311 | # define _HBClearMask HBClearMask |
| 312 | # define _ActiveMask ActiveMask |
| 313 | # define _ActiveMask2 ActiveMask2 |
| 314 | # define _ActiveMaskEnd ActiveMaskEnd |
| 315 | # define _ShiftBpp ShiftBpp |
| 316 | # define _ShiftRem ShiftRem |
| 317 | #ifdef PNG_THREAD_UNSAFE_OK |
| 318 | # define _unmask unmask |
| 319 | # define _FullLength FullLength |
| 320 | # define _MMXLength MMXLength |
| 321 | # define _dif dif |
| 322 | # define _patemp patemp |
| 323 | # define _pbtemp pbtemp |
| 324 | # define _pctemp pctemp |
| 325 | #endif |
| 326 | #endif |
| 327 | |
| 328 | |
| 329 | /* These constants are used in the inlined MMX assembly code. |
| 330 | Ignore gcc's "At top level: defined but not used" warnings. */ |
| 331 | |
| 332 | /* GRR 20000706: originally _unmask was needed only when compiling with -fPIC, |
| 333 | * since that case uses the %ebx register for indexing the Global Offset Table |
| 334 | * and there were no other registers available. But gcc 2.95 and later emit |
| 335 | * "more than 10 operands in `asm'" errors when %ebx is used to preload unmask |
| 336 | * in the non-PIC case, so we'll just use the global unconditionally now. |
| 337 | */ |
| 338 | #ifdef PNG_THREAD_UNSAFE_OK |
| 339 | static int _unmask; |
| 340 | #endif |
| 341 | |
| 342 | const static unsigned long long _mask8_0 = 0x0102040810204080LL; |
| 343 | |
| 344 | const static unsigned long long _mask16_1 = 0x0101020204040808LL; |
| 345 | const static unsigned long long _mask16_0 = 0x1010202040408080LL; |
| 346 | |
| 347 | const static unsigned long long _mask24_2 = 0x0101010202020404LL; |
| 348 | const static unsigned long long _mask24_1 = 0x0408080810101020LL; |
| 349 | const static unsigned long long _mask24_0 = 0x2020404040808080LL; |
| 350 | |
| 351 | const static unsigned long long _mask32_3 = 0x0101010102020202LL; |
| 352 | const static unsigned long long _mask32_2 = 0x0404040408080808LL; |
| 353 | const static unsigned long long _mask32_1 = 0x1010101020202020LL; |
| 354 | const static unsigned long long _mask32_0 = 0x4040404080808080LL; |
| 355 | |
| 356 | const static unsigned long long _mask48_5 = 0x0101010101010202LL; |
| 357 | const static unsigned long long _mask48_4 = 0x0202020204040404LL; |
| 358 | const static unsigned long long _mask48_3 = 0x0404080808080808LL; |
| 359 | const static unsigned long long _mask48_2 = 0x1010101010102020LL; |
| 360 | const static unsigned long long _mask48_1 = 0x2020202040404040LL; |
| 361 | const static unsigned long long _mask48_0 = 0x4040808080808080LL; |
| 362 | |
| 363 | const static unsigned long long _const4 = 0x0000000000FFFFFFLL; |
| 364 | //const static unsigned long long _const5 = 0x000000FFFFFF0000LL; // NOT USED |
| 365 | const static unsigned long long _const6 = 0x00000000000000FFLL; |
| 366 | |
| 367 | // These are used in the row-filter routines and should/would be local |
| 368 | // variables if not for gcc addressing limitations. |
| 369 | // WARNING: Their presence probably defeats the thread safety of libpng. |
| 370 | |
| 371 | #ifdef PNG_THREAD_UNSAFE_OK |
| 372 | static png_uint_32 _FullLength; |
| 373 | static png_uint_32 _MMXLength; |
| 374 | static int _dif; |
| 375 | static int _patemp; // temp variables for Paeth routine |
| 376 | static int _pbtemp; |
| 377 | static int _pctemp; |
| 378 | #endif |
| 379 | |
| 380 | void /* PRIVATE */ |
| 381 | png_squelch_warnings(void) |
| 382 | { |
| 383 | #ifdef PNG_THREAD_UNSAFE_OK |
| 384 | _dif = _dif; |
| 385 | _patemp = _patemp; |
| 386 | _pbtemp = _pbtemp; |
| 387 | _pctemp = _pctemp; |
| 388 | _MMXLength = _MMXLength; |
| 389 | #endif |
| 390 | _const4 = _const4; |
| 391 | _const6 = _const6; |
| 392 | _mask8_0 = _mask8_0; |
| 393 | _mask16_1 = _mask16_1; |
| 394 | _mask16_0 = _mask16_0; |
| 395 | _mask24_2 = _mask24_2; |
| 396 | _mask24_1 = _mask24_1; |
| 397 | _mask24_0 = _mask24_0; |
| 398 | _mask32_3 = _mask32_3; |
| 399 | _mask32_2 = _mask32_2; |
| 400 | _mask32_1 = _mask32_1; |
| 401 | _mask32_0 = _mask32_0; |
| 402 | _mask48_5 = _mask48_5; |
| 403 | _mask48_4 = _mask48_4; |
| 404 | _mask48_3 = _mask48_3; |
| 405 | _mask48_2 = _mask48_2; |
| 406 | _mask48_1 = _mask48_1; |
| 407 | _mask48_0 = _mask48_0; |
| 408 | } |
| 409 | #endif /* PNG_MMX_CODE_SUPPORTED */ |
| 410 | |
| 411 | |
| 412 | static int _mmx_supported = 2; |
| 413 | |
| 414 | /*===========================================================================*/ |
| 415 | /* */ |
| 416 | /* P N G _ C O M B I N E _ R O W */ |
| 417 | /* */ |
| 418 | /*===========================================================================*/ |
| 419 | |
| 420 | #if defined(PNG_HAVE_MMX_COMBINE_ROW) |
| 421 | |
| 422 | #define BPP2 2 |
| 423 | #define BPP3 3 /* bytes per pixel (a.k.a. pixel_bytes) */ |
| 424 | #define BPP4 4 |
| 425 | #define BPP6 6 /* (defined only to help avoid cut-and-paste errors) */ |
| 426 | #define BPP8 8 |
| 427 | |
| 428 | /* Combines the row recently read in with the previous row. |
| 429 | This routine takes care of alpha and transparency if requested. |
| 430 | This routine also handles the two methods of progressive display |
| 431 | of interlaced images, depending on the mask value. |
| 432 | The mask value describes which pixels are to be combined with |
| 433 | the row. The pattern always repeats every 8 pixels, so just 8 |
| 434 | bits are needed. A one indicates the pixel is to be combined; a |
| 435 | zero indicates the pixel is to be skipped. This is in addition |
| 436 | to any alpha or transparency value associated with the pixel. |
| 437 | If you want all pixels to be combined, pass 0xff (255) in mask. */ |
| 438 | |
| 439 | /* Use this routine for the x86 platform - it uses a faster MMX routine |
| 440 | if the machine supports MMX. */ |
| 441 | |
| 442 | void /* PRIVATE */ |
| 443 | png_combine_row(png_structp png_ptr, png_bytep row, int mask) |
| 444 | { |
| 445 | png_debug(1, "in png_combine_row (pnggccrd.c)\n"); |
| 446 | |
| 447 | #if defined(PNG_MMX_CODE_SUPPORTED) |
| 448 | if (_mmx_supported == 2) { |
| 449 | #if !defined(PNG_1_0_X) |
| 450 | /* this should have happened in png_init_mmx_flags() already */ |
| 451 | png_warning(png_ptr, "asm_flags may not have been initialized"); |
| 452 | #endif |
| 453 | png_mmx_support(); |
| 454 | } |
| 455 | #endif |
| 456 | |
| 457 | if (mask == 0xff) |
| 458 | { |
| 459 | png_debug(2,"mask == 0xff: doing single png_memcpy()\n"); |
| 460 | png_memcpy(row, png_ptr->row_buf + 1, |
| 461 | (png_size_t)PNG_ROWBYTES(png_ptr->row_info.pixel_depth,png_ptr->width)); |
| 462 | } |
| 463 | else /* (png_combine_row() is never called with mask == 0) */ |
| 464 | { |
| 465 | switch (png_ptr->row_info.pixel_depth) |
| 466 | { |
| 467 | case 1: /* png_ptr->row_info.pixel_depth */ |
| 468 | { |
| 469 | png_bytep sp; |
| 470 | png_bytep dp; |
| 471 | int s_inc, s_start, s_end; |
| 472 | int m; |
| 473 | int shift; |
| 474 | png_uint_32 i; |
| 475 | |
| 476 | sp = png_ptr->row_buf + 1; |
| 477 | dp = row; |
| 478 | m = 0x80; |
| 479 | #if defined(PNG_READ_PACKSWAP_SUPPORTED) |
| 480 | if (png_ptr->transformations & PNG_PACKSWAP) |
| 481 | { |
| 482 | s_start = 0; |
| 483 | s_end = 7; |
| 484 | s_inc = 1; |
| 485 | } |
| 486 | else |
| 487 | #endif |
| 488 | { |
| 489 | s_start = 7; |
| 490 | s_end = 0; |
| 491 | s_inc = -1; |
| 492 | } |
| 493 | |
| 494 | shift = s_start; |
| 495 | |
| 496 | for (i = 0; i < png_ptr->width; i++) |
| 497 | { |
| 498 | if (m & mask) |
| 499 | { |
| 500 | int value; |
| 501 | |
| 502 | value = (*sp >> shift) & 0x1; |
| 503 | *dp &= (png_byte)((0x7f7f >> (7 - shift)) & 0xff); |
| 504 | *dp |= (png_byte)(value << shift); |
| 505 | } |
| 506 | |
| 507 | if (shift == s_end) |
| 508 | { |
| 509 | shift = s_start; |
| 510 | sp++; |
| 511 | dp++; |
| 512 | } |
| 513 | else |
| 514 | shift += s_inc; |
| 515 | |
| 516 | if (m == 1) |
| 517 | m = 0x80; |
| 518 | else |
| 519 | m >>= 1; |
| 520 | } |
| 521 | break; |
| 522 | } |
| 523 | |
| 524 | case 2: /* png_ptr->row_info.pixel_depth */ |
| 525 | { |
| 526 | png_bytep sp; |
| 527 | png_bytep dp; |
| 528 | int s_start, s_end, s_inc; |
| 529 | int m; |
| 530 | int shift; |
| 531 | png_uint_32 i; |
| 532 | int value; |
| 533 | |
| 534 | sp = png_ptr->row_buf + 1; |
| 535 | dp = row; |
| 536 | m = 0x80; |
| 537 | #if defined(PNG_READ_PACKSWAP_SUPPORTED) |
| 538 | if (png_ptr->transformations & PNG_PACKSWAP) |
| 539 | { |
| 540 | s_start = 0; |
| 541 | s_end = 6; |
| 542 | s_inc = 2; |
| 543 | } |
| 544 | else |
| 545 | #endif |
| 546 | { |
| 547 | s_start = 6; |
| 548 | s_end = 0; |
| 549 | s_inc = -2; |
| 550 | } |
| 551 | |
| 552 | shift = s_start; |
| 553 | |
| 554 | for (i = 0; i < png_ptr->width; i++) |
| 555 | { |
| 556 | if (m & mask) |
| 557 | { |
| 558 | value = (*sp >> shift) & 0x3; |
| 559 | *dp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff); |
| 560 | *dp |= (png_byte)(value << shift); |
| 561 | } |
| 562 | |
| 563 | if (shift == s_end) |
| 564 | { |
| 565 | shift = s_start; |
| 566 | sp++; |
| 567 | dp++; |
| 568 | } |
| 569 | else |
| 570 | shift += s_inc; |
| 571 | if (m == 1) |
| 572 | m = 0x80; |
| 573 | else |
| 574 | m >>= 1; |
| 575 | } |
| 576 | break; |
| 577 | } |
| 578 | |
| 579 | case 4: /* png_ptr->row_info.pixel_depth */ |
| 580 | { |
| 581 | png_bytep sp; |
| 582 | png_bytep dp; |
| 583 | int s_start, s_end, s_inc; |
| 584 | int m; |
| 585 | int shift; |
| 586 | png_uint_32 i; |
| 587 | int value; |
| 588 | |
| 589 | sp = png_ptr->row_buf + 1; |
| 590 | dp = row; |
| 591 | m = 0x80; |
| 592 | #if defined(PNG_READ_PACKSWAP_SUPPORTED) |
| 593 | if (png_ptr->transformations & PNG_PACKSWAP) |
| 594 | { |
| 595 | s_start = 0; |
| 596 | s_end = 4; |
| 597 | s_inc = 4; |
| 598 | } |
| 599 | else |
| 600 | #endif |
| 601 | { |
| 602 | s_start = 4; |
| 603 | s_end = 0; |
| 604 | s_inc = -4; |
| 605 | } |
| 606 | shift = s_start; |
| 607 | |
| 608 | for (i = 0; i < png_ptr->width; i++) |
| 609 | { |
| 610 | if (m & mask) |
| 611 | { |
| 612 | value = (*sp >> shift) & 0xf; |
| 613 | *dp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff); |
| 614 | *dp |= (png_byte)(value << shift); |
| 615 | } |
| 616 | |
| 617 | if (shift == s_end) |
| 618 | { |
| 619 | shift = s_start; |
| 620 | sp++; |
| 621 | dp++; |
| 622 | } |
| 623 | else |
| 624 | shift += s_inc; |
| 625 | if (m == 1) |
| 626 | m = 0x80; |
| 627 | else |
| 628 | m >>= 1; |
| 629 | } |
| 630 | break; |
| 631 | } |
| 632 | |
| 633 | case 8: /* png_ptr->row_info.pixel_depth */ |
| 634 | { |
| 635 | png_bytep srcptr; |
| 636 | png_bytep dstptr; |
| 637 | |
| 638 | #if defined(PNG_MMX_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK) |
| 639 | #if !defined(PNG_1_0_X) |
| 640 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW) |
| 641 | /* && _mmx_supported */ ) |
| 642 | #else |
| 643 | if (_mmx_supported) |
| 644 | #endif |
| 645 | { |
| 646 | png_uint_32 len; |
| 647 | int diff; |
| 648 | int dummy_value_a; // fix 'forbidden register spilled' error |
| 649 | int dummy_value_d; |
| 650 | int dummy_value_c; |
| 651 | int dummy_value_S; |
| 652 | int dummy_value_D; |
| 653 | _unmask = ~mask; // global variable for -fPIC version |
| 654 | srcptr = png_ptr->row_buf + 1; |
| 655 | dstptr = row; |
| 656 | len = png_ptr->width &~7; // reduce to multiple of 8 |
| 657 | diff = (int) (png_ptr->width & 7); // amount lost |
| 658 | |
| 659 | __asm__ __volatile__ ( |
| 660 | "movd _unmask, %%mm7 \n\t" // load bit pattern |
| 661 | "psubb %%mm6, %%mm6 \n\t" // zero mm6 |
| 662 | "punpcklbw %%mm7, %%mm7 \n\t" |
| 663 | "punpcklwd %%mm7, %%mm7 \n\t" |
| 664 | "punpckldq %%mm7, %%mm7 \n\t" // fill reg with 8 masks |
| 665 | |
| 666 | "movq _mask8_0, %%mm0 \n\t" |
| 667 | "pand %%mm7, %%mm0 \n\t" // nonzero if keep byte |
| 668 | "pcmpeqb %%mm6, %%mm0 \n\t" // zeros->1s, v versa |
| 669 | |
| 670 | // preload "movl len, %%ecx \n\t" // load length of line |
| 671 | // preload "movl srcptr, %%esi \n\t" // load source |
| 672 | // preload "movl dstptr, %%edi \n\t" // load dest |
| 673 | |
| 674 | "cmpl $0, %%ecx \n\t" // len == 0 ? |
| 675 | "je mainloop8end \n\t" |
| 676 | |
| 677 | "mainloop8: \n\t" |
| 678 | "movq (%%esi), %%mm4 \n\t" // *srcptr |
| 679 | "pand %%mm0, %%mm4 \n\t" |
| 680 | "movq %%mm0, %%mm6 \n\t" |
| 681 | "pandn (%%edi), %%mm6 \n\t" // *dstptr |
| 682 | "por %%mm6, %%mm4 \n\t" |
| 683 | "movq %%mm4, (%%edi) \n\t" |
| 684 | "addl $8, %%esi \n\t" // inc by 8 bytes processed |
| 685 | "addl $8, %%edi \n\t" |
| 686 | "subl $8, %%ecx \n\t" // dec by 8 pixels processed |
| 687 | "ja mainloop8 \n\t" |
| 688 | |
| 689 | "mainloop8end: \n\t" |
| 690 | // preload "movl diff, %%ecx \n\t" // (diff is in eax) |
| 691 | "movl %%eax, %%ecx \n\t" |
| 692 | "cmpl $0, %%ecx \n\t" |
| 693 | "jz end8 \n\t" |
| 694 | // preload "movl mask, %%edx \n\t" |
| 695 | "sall $24, %%edx \n\t" // make low byte, high byte |
| 696 | |
| 697 | "secondloop8: \n\t" |
| 698 | "sall %%edx \n\t" // move high bit to CF |
| 699 | "jnc skip8 \n\t" // if CF = 0 |
| 700 | "movb (%%esi), %%al \n\t" |
| 701 | "movb %%al, (%%edi) \n\t" |
| 702 | |
| 703 | "skip8: \n\t" |
| 704 | "incl %%esi \n\t" |
| 705 | "incl %%edi \n\t" |
| 706 | "decl %%ecx \n\t" |
| 707 | "jnz secondloop8 \n\t" |
| 708 | |
| 709 | "end8: \n\t" |
| 710 | "EMMS \n\t" // DONE |
| 711 | |
| 712 | : "=a" (dummy_value_a), // output regs (dummy) |
| 713 | "=d" (dummy_value_d), |
| 714 | "=c" (dummy_value_c), |
| 715 | "=S" (dummy_value_S), |
| 716 | "=D" (dummy_value_D) |
| 717 | |
| 718 | : "3" (srcptr), // esi // input regs |
| 719 | "4" (dstptr), // edi |
| 720 | "0" (diff), // eax |
| 721 | // was (unmask) "b" RESERVED // ebx // Global Offset Table idx |
| 722 | "2" (len), // ecx |
| 723 | "1" (mask) // edx |
| 724 | |
| 725 | #if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 726 | : "%mm0", "%mm4", "%mm6", "%mm7" // clobber list |
| 727 | #endif |
| 728 | ); |
| 729 | } |
| 730 | else /* mmx _not supported - Use modified C routine */ |
| 731 | #endif /* PNG_MMX_CODE_SUPPORTED */ |
| 732 | { |
| 733 | register png_uint_32 i; |
| 734 | png_uint_32 initial_val = png_pass_start[png_ptr->pass]; |
| 735 | /* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */ |
| 736 | register int stride = png_pass_inc[png_ptr->pass]; |
| 737 | /* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */ |
| 738 | register int rep_bytes = png_pass_width[png_ptr->pass]; |
| 739 | /* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */ |
| 740 | png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */ |
| 741 | int diff = (int) (png_ptr->width & 7); /* amount lost */ |
| 742 | register png_uint_32 final_val = len; /* GRR bugfix */ |
| 743 | |
| 744 | srcptr = png_ptr->row_buf + 1 + initial_val; |
| 745 | dstptr = row + initial_val; |
| 746 | |
| 747 | for (i = initial_val; i < final_val; i += stride) |
| 748 | { |
| 749 | png_memcpy(dstptr, srcptr, rep_bytes); |
| 750 | srcptr += stride; |
| 751 | dstptr += stride; |
| 752 | } |
| 753 | if (diff) /* number of leftover pixels: 3 for pngtest */ |
| 754 | { |
| 755 | final_val+=diff /* *BPP1 */ ; |
| 756 | for (; i < final_val; i += stride) |
| 757 | { |
| 758 | if (rep_bytes > (int)(final_val-i)) |
| 759 | rep_bytes = (int)(final_val-i); |
| 760 | png_memcpy(dstptr, srcptr, rep_bytes); |
| 761 | srcptr += stride; |
| 762 | dstptr += stride; |
| 763 | } |
| 764 | } |
| 765 | |
| 766 | } /* end of else (_mmx_supported) */ |
| 767 | |
| 768 | break; |
| 769 | } /* end 8 bpp */ |
| 770 | |
| 771 | case 16: /* png_ptr->row_info.pixel_depth */ |
| 772 | { |
| 773 | png_bytep srcptr; |
| 774 | png_bytep dstptr; |
| 775 | |
| 776 | #if defined(PNG_MMX_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK) |
| 777 | #if !defined(PNG_1_0_X) |
| 778 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW) |
| 779 | /* && _mmx_supported */ ) |
| 780 | #else |
| 781 | if (_mmx_supported) |
| 782 | #endif |
| 783 | { |
| 784 | png_uint_32 len; |
| 785 | int diff; |
| 786 | int dummy_value_a; // fix 'forbidden register spilled' error |
| 787 | int dummy_value_d; |
| 788 | int dummy_value_c; |
| 789 | int dummy_value_S; |
| 790 | int dummy_value_D; |
| 791 | _unmask = ~mask; // global variable for -fPIC version |
| 792 | srcptr = png_ptr->row_buf + 1; |
| 793 | dstptr = row; |
| 794 | len = png_ptr->width &~7; // reduce to multiple of 8 |
| 795 | diff = (int) (png_ptr->width & 7); // amount lost // |
| 796 | |
| 797 | __asm__ __volatile__ ( |
| 798 | "movd _unmask, %%mm7 \n\t" // load bit pattern |
| 799 | "psubb %%mm6, %%mm6 \n\t" // zero mm6 |
| 800 | "punpcklbw %%mm7, %%mm7 \n\t" |
| 801 | "punpcklwd %%mm7, %%mm7 \n\t" |
| 802 | "punpckldq %%mm7, %%mm7 \n\t" // fill reg with 8 masks |
| 803 | |
| 804 | "movq _mask16_0, %%mm0 \n\t" |
| 805 | "movq _mask16_1, %%mm1 \n\t" |
| 806 | |
| 807 | "pand %%mm7, %%mm0 \n\t" |
| 808 | "pand %%mm7, %%mm1 \n\t" |
| 809 | |
| 810 | "pcmpeqb %%mm6, %%mm0 \n\t" |
| 811 | "pcmpeqb %%mm6, %%mm1 \n\t" |
| 812 | |
| 813 | // preload "movl len, %%ecx \n\t" // load length of line |
| 814 | // preload "movl srcptr, %%esi \n\t" // load source |
| 815 | // preload "movl dstptr, %%edi \n\t" // load dest |
| 816 | |
| 817 | "cmpl $0, %%ecx \n\t" |
| 818 | "jz mainloop16end \n\t" |
| 819 | |
| 820 | "mainloop16: \n\t" |
| 821 | "movq (%%esi), %%mm4 \n\t" |
| 822 | "pand %%mm0, %%mm4 \n\t" |
| 823 | "movq %%mm0, %%mm6 \n\t" |
| 824 | "movq (%%edi), %%mm7 \n\t" |
| 825 | "pandn %%mm7, %%mm6 \n\t" |
| 826 | "por %%mm6, %%mm4 \n\t" |
| 827 | "movq %%mm4, (%%edi) \n\t" |
| 828 | |
| 829 | "movq 8(%%esi), %%mm5 \n\t" |
| 830 | "pand %%mm1, %%mm5 \n\t" |
| 831 | "movq %%mm1, %%mm7 \n\t" |
| 832 | "movq 8(%%edi), %%mm6 \n\t" |
| 833 | "pandn %%mm6, %%mm7 \n\t" |
| 834 | "por %%mm7, %%mm5 \n\t" |
| 835 | "movq %%mm5, 8(%%edi) \n\t" |
| 836 | |
| 837 | "addl $16, %%esi \n\t" // inc by 16 bytes processed |
| 838 | "addl $16, %%edi \n\t" |
| 839 | "subl $8, %%ecx \n\t" // dec by 8 pixels processed |
| 840 | "ja mainloop16 \n\t" |
| 841 | |
| 842 | "mainloop16end: \n\t" |
| 843 | // preload "movl diff, %%ecx \n\t" // (diff is in eax) |
| 844 | "movl %%eax, %%ecx \n\t" |
| 845 | "cmpl $0, %%ecx \n\t" |
| 846 | "jz end16 \n\t" |
| 847 | // preload "movl mask, %%edx \n\t" |
| 848 | "sall $24, %%edx \n\t" // make low byte, high byte |
| 849 | |
| 850 | "secondloop16: \n\t" |
| 851 | "sall %%edx \n\t" // move high bit to CF |
| 852 | "jnc skip16 \n\t" // if CF = 0 |
| 853 | "movw (%%esi), %%ax \n\t" |
| 854 | "movw %%ax, (%%edi) \n\t" |
| 855 | |
| 856 | "skip16: \n\t" |
| 857 | "addl $2, %%esi \n\t" |
| 858 | "addl $2, %%edi \n\t" |
| 859 | "decl %%ecx \n\t" |
| 860 | "jnz secondloop16 \n\t" |
| 861 | |
| 862 | "end16: \n\t" |
| 863 | "EMMS \n\t" // DONE |
| 864 | |
| 865 | : "=a" (dummy_value_a), // output regs (dummy) |
| 866 | "=c" (dummy_value_c), |
| 867 | "=d" (dummy_value_d), |
| 868 | "=S" (dummy_value_S), |
| 869 | "=D" (dummy_value_D) |
| 870 | |
| 871 | : "0" (diff), // eax // input regs |
| 872 | // was (unmask) " " RESERVED // ebx // Global Offset Table idx |
| 873 | "1" (len), // ecx |
| 874 | "2" (mask), // edx |
| 875 | "3" (srcptr), // esi |
| 876 | "4" (dstptr) // edi |
| 877 | |
| 878 | #if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 879 | : "%mm0", "%mm1", "%mm4" // clobber list |
| 880 | , "%mm5", "%mm6", "%mm7" |
| 881 | #endif |
| 882 | ); |
| 883 | } |
| 884 | else /* mmx _not supported - Use modified C routine */ |
| 885 | #endif /* PNG_MMX_CODE_SUPPORTED */ |
| 886 | { |
| 887 | register png_uint_32 i; |
| 888 | png_uint_32 initial_val = BPP2 * png_pass_start[png_ptr->pass]; |
| 889 | /* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */ |
| 890 | register int stride = BPP2 * png_pass_inc[png_ptr->pass]; |
| 891 | /* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */ |
| 892 | register int rep_bytes = BPP2 * png_pass_width[png_ptr->pass]; |
| 893 | /* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */ |
| 894 | png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */ |
| 895 | int diff = (int) (png_ptr->width & 7); /* amount lost */ |
| 896 | register png_uint_32 final_val = BPP2 * len; /* GRR bugfix */ |
| 897 | |
| 898 | srcptr = png_ptr->row_buf + 1 + initial_val; |
| 899 | dstptr = row + initial_val; |
| 900 | |
| 901 | for (i = initial_val; i < final_val; i += stride) |
| 902 | { |
| 903 | png_memcpy(dstptr, srcptr, rep_bytes); |
| 904 | srcptr += stride; |
| 905 | dstptr += stride; |
| 906 | } |
| 907 | if (diff) /* number of leftover pixels: 3 for pngtest */ |
| 908 | { |
| 909 | final_val+=diff*BPP2; |
| 910 | for (; i < final_val; i += stride) |
| 911 | { |
| 912 | if (rep_bytes > (int)(final_val-i)) |
| 913 | rep_bytes = (int)(final_val-i); |
| 914 | png_memcpy(dstptr, srcptr, rep_bytes); |
| 915 | srcptr += stride; |
| 916 | dstptr += stride; |
| 917 | } |
| 918 | } |
| 919 | } /* end of else (_mmx_supported) */ |
| 920 | |
| 921 | break; |
| 922 | } /* end 16 bpp */ |
| 923 | |
| 924 | case 24: /* png_ptr->row_info.pixel_depth */ |
| 925 | { |
| 926 | png_bytep srcptr; |
| 927 | png_bytep dstptr; |
| 928 | |
| 929 | #if defined(PNG_MMX_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK) |
| 930 | #if !defined(PNG_1_0_X) |
| 931 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW) |
| 932 | /* && _mmx_supported */ ) |
| 933 | #else |
| 934 | if (_mmx_supported) |
| 935 | #endif |
| 936 | { |
| 937 | png_uint_32 len; |
| 938 | int diff; |
| 939 | int dummy_value_a; // fix 'forbidden register spilled' error |
| 940 | int dummy_value_d; |
| 941 | int dummy_value_c; |
| 942 | int dummy_value_S; |
| 943 | int dummy_value_D; |
| 944 | _unmask = ~mask; // global variable for -fPIC version |
| 945 | srcptr = png_ptr->row_buf + 1; |
| 946 | dstptr = row; |
| 947 | len = png_ptr->width &~7; // reduce to multiple of 8 |
| 948 | diff = (int) (png_ptr->width & 7); // amount lost // |
| 949 | |
| 950 | __asm__ __volatile__ ( |
| 951 | "movd _unmask, %%mm7 \n\t" // load bit pattern |
| 952 | "psubb %%mm6, %%mm6 \n\t" // zero mm6 |
| 953 | "punpcklbw %%mm7, %%mm7 \n\t" |
| 954 | "punpcklwd %%mm7, %%mm7 \n\t" |
| 955 | "punpckldq %%mm7, %%mm7 \n\t" // fill reg with 8 masks |
| 956 | |
| 957 | "movq _mask24_0, %%mm0 \n\t" |
| 958 | "movq _mask24_1, %%mm1 \n\t" |
| 959 | "movq _mask24_2, %%mm2 \n\t" |
| 960 | |
| 961 | "pand %%mm7, %%mm0 \n\t" |
| 962 | "pand %%mm7, %%mm1 \n\t" |
| 963 | "pand %%mm7, %%mm2 \n\t" |
| 964 | |
| 965 | "pcmpeqb %%mm6, %%mm0 \n\t" |
| 966 | "pcmpeqb %%mm6, %%mm1 \n\t" |
| 967 | "pcmpeqb %%mm6, %%mm2 \n\t" |
| 968 | |
| 969 | // preload "movl len, %%ecx \n\t" // load length of line |
| 970 | // preload "movl srcptr, %%esi \n\t" // load source |
| 971 | // preload "movl dstptr, %%edi \n\t" // load dest |
| 972 | |
| 973 | "cmpl $0, %%ecx \n\t" |
| 974 | "jz mainloop24end \n\t" |
| 975 | |
| 976 | "mainloop24: \n\t" |
| 977 | "movq (%%esi), %%mm4 \n\t" |
| 978 | "pand %%mm0, %%mm4 \n\t" |
| 979 | "movq %%mm0, %%mm6 \n\t" |
| 980 | "movq (%%edi), %%mm7 \n\t" |
| 981 | "pandn %%mm7, %%mm6 \n\t" |
| 982 | "por %%mm6, %%mm4 \n\t" |
| 983 | "movq %%mm4, (%%edi) \n\t" |
| 984 | |
| 985 | "movq 8(%%esi), %%mm5 \n\t" |
| 986 | "pand %%mm1, %%mm5 \n\t" |
| 987 | "movq %%mm1, %%mm7 \n\t" |
| 988 | "movq 8(%%edi), %%mm6 \n\t" |
| 989 | "pandn %%mm6, %%mm7 \n\t" |
| 990 | "por %%mm7, %%mm5 \n\t" |
| 991 | "movq %%mm5, 8(%%edi) \n\t" |
| 992 | |
| 993 | "movq 16(%%esi), %%mm6 \n\t" |
| 994 | "pand %%mm2, %%mm6 \n\t" |
| 995 | "movq %%mm2, %%mm4 \n\t" |
| 996 | "movq 16(%%edi), %%mm7 \n\t" |
| 997 | "pandn %%mm7, %%mm4 \n\t" |
| 998 | "por %%mm4, %%mm6 \n\t" |
| 999 | "movq %%mm6, 16(%%edi) \n\t" |
| 1000 | |
| 1001 | "addl $24, %%esi \n\t" // inc by 24 bytes processed |
| 1002 | "addl $24, %%edi \n\t" |
| 1003 | "subl $8, %%ecx \n\t" // dec by 8 pixels processed |
| 1004 | |
| 1005 | "ja mainloop24 \n\t" |
| 1006 | |
| 1007 | "mainloop24end: \n\t" |
| 1008 | // preload "movl diff, %%ecx \n\t" // (diff is in eax) |
| 1009 | "movl %%eax, %%ecx \n\t" |
| 1010 | "cmpl $0, %%ecx \n\t" |
| 1011 | "jz end24 \n\t" |
| 1012 | // preload "movl mask, %%edx \n\t" |
| 1013 | "sall $24, %%edx \n\t" // make low byte, high byte |
| 1014 | |
| 1015 | "secondloop24: \n\t" |
| 1016 | "sall %%edx \n\t" // move high bit to CF |
| 1017 | "jnc skip24 \n\t" // if CF = 0 |
| 1018 | "movw (%%esi), %%ax \n\t" |
| 1019 | "movw %%ax, (%%edi) \n\t" |
| 1020 | "xorl %%eax, %%eax \n\t" |
| 1021 | "movb 2(%%esi), %%al \n\t" |
| 1022 | "movb %%al, 2(%%edi) \n\t" |
| 1023 | |
| 1024 | "skip24: \n\t" |
| 1025 | "addl $3, %%esi \n\t" |
| 1026 | "addl $3, %%edi \n\t" |
| 1027 | "decl %%ecx \n\t" |
| 1028 | "jnz secondloop24 \n\t" |
| 1029 | |
| 1030 | "end24: \n\t" |
| 1031 | "EMMS \n\t" // DONE |
| 1032 | |
| 1033 | : "=a" (dummy_value_a), // output regs (dummy) |
| 1034 | "=d" (dummy_value_d), |
| 1035 | "=c" (dummy_value_c), |
| 1036 | "=S" (dummy_value_S), |
| 1037 | "=D" (dummy_value_D) |
| 1038 | |
| 1039 | : "3" (srcptr), // esi // input regs |
| 1040 | "4" (dstptr), // edi |
| 1041 | "0" (diff), // eax |
| 1042 | // was (unmask) "b" RESERVED // ebx // Global Offset Table idx |
| 1043 | "2" (len), // ecx |
| 1044 | "1" (mask) // edx |
| 1045 | |
| 1046 | #if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 1047 | : "%mm0", "%mm1", "%mm2" // clobber list |
| 1048 | , "%mm4", "%mm5", "%mm6", "%mm7" |
| 1049 | #endif |
| 1050 | ); |
| 1051 | } |
| 1052 | else /* mmx _not supported - Use modified C routine */ |
| 1053 | #endif /* PNG_MMX_CODE_SUPPORTED */ |
| 1054 | { |
| 1055 | register png_uint_32 i; |
| 1056 | png_uint_32 initial_val = BPP3 * png_pass_start[png_ptr->pass]; |
| 1057 | /* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */ |
| 1058 | register int stride = BPP3 * png_pass_inc[png_ptr->pass]; |
| 1059 | /* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */ |
| 1060 | register int rep_bytes = BPP3 * png_pass_width[png_ptr->pass]; |
| 1061 | /* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */ |
| 1062 | png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */ |
| 1063 | int diff = (int) (png_ptr->width & 7); /* amount lost */ |
| 1064 | register png_uint_32 final_val = BPP3 * len; /* GRR bugfix */ |
| 1065 | |
| 1066 | srcptr = png_ptr->row_buf + 1 + initial_val; |
| 1067 | dstptr = row + initial_val; |
| 1068 | |
| 1069 | for (i = initial_val; i < final_val; i += stride) |
| 1070 | { |
| 1071 | png_memcpy(dstptr, srcptr, rep_bytes); |
| 1072 | srcptr += stride; |
| 1073 | dstptr += stride; |
| 1074 | } |
| 1075 | if (diff) /* number of leftover pixels: 3 for pngtest */ |
| 1076 | { |
| 1077 | final_val+=diff*BPP3; |
| 1078 | for (; i < final_val; i += stride) |
| 1079 | { |
| 1080 | if (rep_bytes > (int)(final_val-i)) |
| 1081 | rep_bytes = (int)(final_val-i); |
| 1082 | png_memcpy(dstptr, srcptr, rep_bytes); |
| 1083 | srcptr += stride; |
| 1084 | dstptr += stride; |
| 1085 | } |
| 1086 | } |
| 1087 | } /* end of else (_mmx_supported) */ |
| 1088 | |
| 1089 | break; |
| 1090 | } /* end 24 bpp */ |
| 1091 | |
| 1092 | case 32: /* png_ptr->row_info.pixel_depth */ |
| 1093 | { |
| 1094 | png_bytep srcptr; |
| 1095 | png_bytep dstptr; |
| 1096 | |
| 1097 | #if defined(PNG_MMX_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK) |
| 1098 | #if !defined(PNG_1_0_X) |
| 1099 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW) |
| 1100 | /* && _mmx_supported */ ) |
| 1101 | #else |
| 1102 | if (_mmx_supported) |
| 1103 | #endif |
| 1104 | { |
| 1105 | png_uint_32 len; |
| 1106 | int diff; |
| 1107 | int dummy_value_a; // fix 'forbidden register spilled' error |
| 1108 | int dummy_value_d; |
| 1109 | int dummy_value_c; |
| 1110 | int dummy_value_S; |
| 1111 | int dummy_value_D; |
| 1112 | _unmask = ~mask; // global variable for -fPIC version |
| 1113 | srcptr = png_ptr->row_buf + 1; |
| 1114 | dstptr = row; |
| 1115 | len = png_ptr->width &~7; // reduce to multiple of 8 |
| 1116 | diff = (int) (png_ptr->width & 7); // amount lost // |
| 1117 | |
| 1118 | __asm__ __volatile__ ( |
| 1119 | "movd _unmask, %%mm7 \n\t" // load bit pattern |
| 1120 | "psubb %%mm6, %%mm6 \n\t" // zero mm6 |
| 1121 | "punpcklbw %%mm7, %%mm7 \n\t" |
| 1122 | "punpcklwd %%mm7, %%mm7 \n\t" |
| 1123 | "punpckldq %%mm7, %%mm7 \n\t" // fill reg with 8 masks |
| 1124 | |
| 1125 | "movq _mask32_0, %%mm0 \n\t" |
| 1126 | "movq _mask32_1, %%mm1 \n\t" |
| 1127 | "movq _mask32_2, %%mm2 \n\t" |
| 1128 | "movq _mask32_3, %%mm3 \n\t" |
| 1129 | |
| 1130 | "pand %%mm7, %%mm0 \n\t" |
| 1131 | "pand %%mm7, %%mm1 \n\t" |
| 1132 | "pand %%mm7, %%mm2 \n\t" |
| 1133 | "pand %%mm7, %%mm3 \n\t" |
| 1134 | |
| 1135 | "pcmpeqb %%mm6, %%mm0 \n\t" |
| 1136 | "pcmpeqb %%mm6, %%mm1 \n\t" |
| 1137 | "pcmpeqb %%mm6, %%mm2 \n\t" |
| 1138 | "pcmpeqb %%mm6, %%mm3 \n\t" |
| 1139 | |
| 1140 | // preload "movl len, %%ecx \n\t" // load length of line |
| 1141 | // preload "movl srcptr, %%esi \n\t" // load source |
| 1142 | // preload "movl dstptr, %%edi \n\t" // load dest |
| 1143 | |
| 1144 | "cmpl $0, %%ecx \n\t" // lcr |
| 1145 | "jz mainloop32end \n\t" |
| 1146 | |
| 1147 | "mainloop32: \n\t" |
| 1148 | "movq (%%esi), %%mm4 \n\t" |
| 1149 | "pand %%mm0, %%mm4 \n\t" |
| 1150 | "movq %%mm0, %%mm6 \n\t" |
| 1151 | "movq (%%edi), %%mm7 \n\t" |
| 1152 | "pandn %%mm7, %%mm6 \n\t" |
| 1153 | "por %%mm6, %%mm4 \n\t" |
| 1154 | "movq %%mm4, (%%edi) \n\t" |
| 1155 | |
| 1156 | "movq 8(%%esi), %%mm5 \n\t" |
| 1157 | "pand %%mm1, %%mm5 \n\t" |
| 1158 | "movq %%mm1, %%mm7 \n\t" |
| 1159 | "movq 8(%%edi), %%mm6 \n\t" |
| 1160 | "pandn %%mm6, %%mm7 \n\t" |
| 1161 | "por %%mm7, %%mm5 \n\t" |
| 1162 | "movq %%mm5, 8(%%edi) \n\t" |
| 1163 | |
| 1164 | "movq 16(%%esi), %%mm6 \n\t" |
| 1165 | "pand %%mm2, %%mm6 \n\t" |
| 1166 | "movq %%mm2, %%mm4 \n\t" |
| 1167 | "movq 16(%%edi), %%mm7 \n\t" |
| 1168 | "pandn %%mm7, %%mm4 \n\t" |
| 1169 | "por %%mm4, %%mm6 \n\t" |
| 1170 | "movq %%mm6, 16(%%edi) \n\t" |
| 1171 | |
| 1172 | "movq 24(%%esi), %%mm7 \n\t" |
| 1173 | "pand %%mm3, %%mm7 \n\t" |
| 1174 | "movq %%mm3, %%mm5 \n\t" |
| 1175 | "movq 24(%%edi), %%mm4 \n\t" |
| 1176 | "pandn %%mm4, %%mm5 \n\t" |
| 1177 | "por %%mm5, %%mm7 \n\t" |
| 1178 | "movq %%mm7, 24(%%edi) \n\t" |
| 1179 | |
| 1180 | "addl $32, %%esi \n\t" // inc by 32 bytes processed |
| 1181 | "addl $32, %%edi \n\t" |
| 1182 | "subl $8, %%ecx \n\t" // dec by 8 pixels processed |
| 1183 | "ja mainloop32 \n\t" |
| 1184 | |
| 1185 | "mainloop32end: \n\t" |
| 1186 | // preload "movl diff, %%ecx \n\t" // (diff is in eax) |
| 1187 | "movl %%eax, %%ecx \n\t" |
| 1188 | "cmpl $0, %%ecx \n\t" |
| 1189 | "jz end32 \n\t" |
| 1190 | // preload "movl mask, %%edx \n\t" |
| 1191 | "sall $24, %%edx \n\t" // low byte => high byte |
| 1192 | |
| 1193 | "secondloop32: \n\t" |
| 1194 | "sall %%edx \n\t" // move high bit to CF |
| 1195 | "jnc skip32 \n\t" // if CF = 0 |
| 1196 | "movl (%%esi), %%eax \n\t" |
| 1197 | "movl %%eax, (%%edi) \n\t" |
| 1198 | |
| 1199 | "skip32: \n\t" |
| 1200 | "addl $4, %%esi \n\t" |
| 1201 | "addl $4, %%edi \n\t" |
| 1202 | "decl %%ecx \n\t" |
| 1203 | "jnz secondloop32 \n\t" |
| 1204 | |
| 1205 | "end32: \n\t" |
| 1206 | "EMMS \n\t" // DONE |
| 1207 | |
| 1208 | : "=a" (dummy_value_a), // output regs (dummy) |
| 1209 | "=d" (dummy_value_d), |
| 1210 | "=c" (dummy_value_c), |
| 1211 | "=S" (dummy_value_S), |
| 1212 | "=D" (dummy_value_D) |
| 1213 | |
| 1214 | : "3" (srcptr), // esi // input regs |
| 1215 | "4" (dstptr), // edi |
| 1216 | "0" (diff), // eax |
| 1217 | // was (unmask) "b" RESERVED // ebx // Global Offset Table idx |
| 1218 | "2" (len), // ecx |
| 1219 | "1" (mask) // edx |
| 1220 | |
| 1221 | #if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 1222 | : "%mm0", "%mm1", "%mm2", "%mm3" // clobber list |
| 1223 | , "%mm4", "%mm5", "%mm6", "%mm7" |
| 1224 | #endif |
| 1225 | ); |
| 1226 | } |
| 1227 | else /* mmx _not supported - Use modified C routine */ |
| 1228 | #endif /* PNG_MMX_CODE_SUPPORTED */ |
| 1229 | { |
| 1230 | register png_uint_32 i; |
| 1231 | png_uint_32 initial_val = BPP4 * png_pass_start[png_ptr->pass]; |
| 1232 | /* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */ |
| 1233 | register int stride = BPP4 * png_pass_inc[png_ptr->pass]; |
| 1234 | /* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */ |
| 1235 | register int rep_bytes = BPP4 * png_pass_width[png_ptr->pass]; |
| 1236 | /* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */ |
| 1237 | png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */ |
| 1238 | int diff = (int) (png_ptr->width & 7); /* amount lost */ |
| 1239 | register png_uint_32 final_val = BPP4 * len; /* GRR bugfix */ |
| 1240 | |
| 1241 | srcptr = png_ptr->row_buf + 1 + initial_val; |
| 1242 | dstptr = row + initial_val; |
| 1243 | |
| 1244 | for (i = initial_val; i < final_val; i += stride) |
| 1245 | { |
| 1246 | png_memcpy(dstptr, srcptr, rep_bytes); |
| 1247 | srcptr += stride; |
| 1248 | dstptr += stride; |
| 1249 | } |
| 1250 | if (diff) /* number of leftover pixels: 3 for pngtest */ |
| 1251 | { |
| 1252 | final_val+=diff*BPP4; |
| 1253 | for (; i < final_val; i += stride) |
| 1254 | { |
| 1255 | if (rep_bytes > (int)(final_val-i)) |
| 1256 | rep_bytes = (int)(final_val-i); |
| 1257 | png_memcpy(dstptr, srcptr, rep_bytes); |
| 1258 | srcptr += stride; |
| 1259 | dstptr += stride; |
| 1260 | } |
| 1261 | } |
| 1262 | } /* end of else (_mmx_supported) */ |
| 1263 | |
| 1264 | break; |
| 1265 | } /* end 32 bpp */ |
| 1266 | |
| 1267 | case 48: /* png_ptr->row_info.pixel_depth */ |
| 1268 | { |
| 1269 | png_bytep srcptr; |
| 1270 | png_bytep dstptr; |
| 1271 | |
| 1272 | #if defined(PNG_MMX_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK) |
| 1273 | #if !defined(PNG_1_0_X) |
| 1274 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW) |
| 1275 | /* && _mmx_supported */ ) |
| 1276 | #else |
| 1277 | if (_mmx_supported) |
| 1278 | #endif |
| 1279 | { |
| 1280 | png_uint_32 len; |
| 1281 | int diff; |
| 1282 | int dummy_value_a; // fix 'forbidden register spilled' error |
| 1283 | int dummy_value_d; |
| 1284 | int dummy_value_c; |
| 1285 | int dummy_value_S; |
| 1286 | int dummy_value_D; |
| 1287 | _unmask = ~mask; // global variable for -fPIC version |
| 1288 | srcptr = png_ptr->row_buf + 1; |
| 1289 | dstptr = row; |
| 1290 | len = png_ptr->width &~7; // reduce to multiple of 8 |
| 1291 | diff = (int) (png_ptr->width & 7); // amount lost // |
| 1292 | |
| 1293 | __asm__ __volatile__ ( |
| 1294 | "movd _unmask, %%mm7 \n\t" // load bit pattern |
| 1295 | "psubb %%mm6, %%mm6 \n\t" // zero mm6 |
| 1296 | "punpcklbw %%mm7, %%mm7 \n\t" |
| 1297 | "punpcklwd %%mm7, %%mm7 \n\t" |
| 1298 | "punpckldq %%mm7, %%mm7 \n\t" // fill reg with 8 masks |
| 1299 | |
| 1300 | "movq _mask48_0, %%mm0 \n\t" |
| 1301 | "movq _mask48_1, %%mm1 \n\t" |
| 1302 | "movq _mask48_2, %%mm2 \n\t" |
| 1303 | "movq _mask48_3, %%mm3 \n\t" |
| 1304 | "movq _mask48_4, %%mm4 \n\t" |
| 1305 | "movq _mask48_5, %%mm5 \n\t" |
| 1306 | |
| 1307 | "pand %%mm7, %%mm0 \n\t" |
| 1308 | "pand %%mm7, %%mm1 \n\t" |
| 1309 | "pand %%mm7, %%mm2 \n\t" |
| 1310 | "pand %%mm7, %%mm3 \n\t" |
| 1311 | "pand %%mm7, %%mm4 \n\t" |
| 1312 | "pand %%mm7, %%mm5 \n\t" |
| 1313 | |
| 1314 | "pcmpeqb %%mm6, %%mm0 \n\t" |
| 1315 | "pcmpeqb %%mm6, %%mm1 \n\t" |
| 1316 | "pcmpeqb %%mm6, %%mm2 \n\t" |
| 1317 | "pcmpeqb %%mm6, %%mm3 \n\t" |
| 1318 | "pcmpeqb %%mm6, %%mm4 \n\t" |
| 1319 | "pcmpeqb %%mm6, %%mm5 \n\t" |
| 1320 | |
| 1321 | // preload "movl len, %%ecx \n\t" // load length of line |
| 1322 | // preload "movl srcptr, %%esi \n\t" // load source |
| 1323 | // preload "movl dstptr, %%edi \n\t" // load dest |
| 1324 | |
| 1325 | "cmpl $0, %%ecx \n\t" |
| 1326 | "jz mainloop48end \n\t" |
| 1327 | |
| 1328 | "mainloop48: \n\t" |
| 1329 | "movq (%%esi), %%mm7 \n\t" |
| 1330 | "pand %%mm0, %%mm7 \n\t" |
| 1331 | "movq %%mm0, %%mm6 \n\t" |
| 1332 | "pandn (%%edi), %%mm6 \n\t" |
| 1333 | "por %%mm6, %%mm7 \n\t" |
| 1334 | "movq %%mm7, (%%edi) \n\t" |
| 1335 | |
| 1336 | "movq 8(%%esi), %%mm6 \n\t" |
| 1337 | "pand %%mm1, %%mm6 \n\t" |
| 1338 | "movq %%mm1, %%mm7 \n\t" |
| 1339 | "pandn 8(%%edi), %%mm7 \n\t" |
| 1340 | "por %%mm7, %%mm6 \n\t" |
| 1341 | "movq %%mm6, 8(%%edi) \n\t" |
| 1342 | |
| 1343 | "movq 16(%%esi), %%mm6 \n\t" |
| 1344 | "pand %%mm2, %%mm6 \n\t" |
| 1345 | "movq %%mm2, %%mm7 \n\t" |
| 1346 | "pandn 16(%%edi), %%mm7 \n\t" |
| 1347 | "por %%mm7, %%mm6 \n\t" |
| 1348 | "movq %%mm6, 16(%%edi) \n\t" |
| 1349 | |
| 1350 | "movq 24(%%esi), %%mm7 \n\t" |
| 1351 | "pand %%mm3, %%mm7 \n\t" |
| 1352 | "movq %%mm3, %%mm6 \n\t" |
| 1353 | "pandn 24(%%edi), %%mm6 \n\t" |
| 1354 | "por %%mm6, %%mm7 \n\t" |
| 1355 | "movq %%mm7, 24(%%edi) \n\t" |
| 1356 | |
| 1357 | "movq 32(%%esi), %%mm6 \n\t" |
| 1358 | "pand %%mm4, %%mm6 \n\t" |
| 1359 | "movq %%mm4, %%mm7 \n\t" |
| 1360 | "pandn 32(%%edi), %%mm7 \n\t" |
| 1361 | "por %%mm7, %%mm6 \n\t" |
| 1362 | "movq %%mm6, 32(%%edi) \n\t" |
| 1363 | |
| 1364 | "movq 40(%%esi), %%mm7 \n\t" |
| 1365 | "pand %%mm5, %%mm7 \n\t" |
| 1366 | "movq %%mm5, %%mm6 \n\t" |
| 1367 | "pandn 40(%%edi), %%mm6 \n\t" |
| 1368 | "por %%mm6, %%mm7 \n\t" |
| 1369 | "movq %%mm7, 40(%%edi) \n\t" |
| 1370 | |
| 1371 | "addl $48, %%esi \n\t" // inc by 48 bytes processed |
| 1372 | "addl $48, %%edi \n\t" |
| 1373 | "subl $8, %%ecx \n\t" // dec by 8 pixels processed |
| 1374 | |
| 1375 | "ja mainloop48 \n\t" |
| 1376 | |
| 1377 | "mainloop48end: \n\t" |
| 1378 | // preload "movl diff, %%ecx \n\t" // (diff is in eax) |
| 1379 | "movl %%eax, %%ecx \n\t" |
| 1380 | "cmpl $0, %%ecx \n\t" |
| 1381 | "jz end48 \n\t" |
| 1382 | // preload "movl mask, %%edx \n\t" |
| 1383 | "sall $24, %%edx \n\t" // make low byte, high byte |
| 1384 | |
| 1385 | "secondloop48: \n\t" |
| 1386 | "sall %%edx \n\t" // move high bit to CF |
| 1387 | "jnc skip48 \n\t" // if CF = 0 |
| 1388 | "movl (%%esi), %%eax \n\t" |
| 1389 | "movl %%eax, (%%edi) \n\t" |
| 1390 | |
| 1391 | "skip48: \n\t" |
| 1392 | "addl $4, %%esi \n\t" |
| 1393 | "addl $4, %%edi \n\t" |
| 1394 | "decl %%ecx \n\t" |
| 1395 | "jnz secondloop48 \n\t" |
| 1396 | |
| 1397 | "end48: \n\t" |
| 1398 | "EMMS \n\t" // DONE |
| 1399 | |
| 1400 | : "=a" (dummy_value_a), // output regs (dummy) |
| 1401 | "=d" (dummy_value_d), |
| 1402 | "=c" (dummy_value_c), |
| 1403 | "=S" (dummy_value_S), |
| 1404 | "=D" (dummy_value_D) |
| 1405 | |
| 1406 | : "3" (srcptr), // esi // input regs |
| 1407 | "4" (dstptr), // edi |
| 1408 | "0" (diff), // eax |
| 1409 | // was (unmask) "b" RESERVED // ebx // Global Offset Table idx |
| 1410 | "2" (len), // ecx |
| 1411 | "1" (mask) // edx |
| 1412 | |
| 1413 | #if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 1414 | : "%mm0", "%mm1", "%mm2", "%mm3" // clobber list |
| 1415 | , "%mm4", "%mm5", "%mm6", "%mm7" |
| 1416 | #endif |
| 1417 | ); |
| 1418 | } |
| 1419 | else /* mmx _not supported - Use modified C routine */ |
| 1420 | #endif /* PNG_MMX_CODE_SUPPORTED */ |
| 1421 | { |
| 1422 | register png_uint_32 i; |
| 1423 | png_uint_32 initial_val = BPP6 * png_pass_start[png_ptr->pass]; |
| 1424 | /* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */ |
| 1425 | register int stride = BPP6 * png_pass_inc[png_ptr->pass]; |
| 1426 | /* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */ |
| 1427 | register int rep_bytes = BPP6 * png_pass_width[png_ptr->pass]; |
| 1428 | /* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */ |
| 1429 | png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */ |
| 1430 | int diff = (int) (png_ptr->width & 7); /* amount lost */ |
| 1431 | register png_uint_32 final_val = BPP6 * len; /* GRR bugfix */ |
| 1432 | |
| 1433 | srcptr = png_ptr->row_buf + 1 + initial_val; |
| 1434 | dstptr = row + initial_val; |
| 1435 | |
| 1436 | for (i = initial_val; i < final_val; i += stride) |
| 1437 | { |
| 1438 | png_memcpy(dstptr, srcptr, rep_bytes); |
| 1439 | srcptr += stride; |
| 1440 | dstptr += stride; |
| 1441 | } |
| 1442 | if (diff) /* number of leftover pixels: 3 for pngtest */ |
| 1443 | { |
| 1444 | final_val+=diff*BPP6; |
| 1445 | for (; i < final_val; i += stride) |
| 1446 | { |
| 1447 | if (rep_bytes > (int)(final_val-i)) |
| 1448 | rep_bytes = (int)(final_val-i); |
| 1449 | png_memcpy(dstptr, srcptr, rep_bytes); |
| 1450 | srcptr += stride; |
| 1451 | dstptr += stride; |
| 1452 | } |
| 1453 | } |
| 1454 | } /* end of else (_mmx_supported) */ |
| 1455 | |
| 1456 | break; |
| 1457 | } /* end 48 bpp */ |
| 1458 | |
| 1459 | case 64: /* png_ptr->row_info.pixel_depth */ |
| 1460 | { |
| 1461 | png_bytep srcptr; |
| 1462 | png_bytep dstptr; |
| 1463 | register png_uint_32 i; |
| 1464 | png_uint_32 initial_val = BPP8 * png_pass_start[png_ptr->pass]; |
| 1465 | /* png.c: png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; */ |
| 1466 | register int stride = BPP8 * png_pass_inc[png_ptr->pass]; |
| 1467 | /* png.c: png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; */ |
| 1468 | register int rep_bytes = BPP8 * png_pass_width[png_ptr->pass]; |
| 1469 | /* png.c: png_pass_width[] = {8, 4, 4, 2, 2, 1, 1}; */ |
| 1470 | png_uint_32 len = png_ptr->width &~7; /* reduce to mult. of 8 */ |
| 1471 | int diff = (int) (png_ptr->width & 7); /* amount lost */ |
| 1472 | register png_uint_32 final_val = BPP8 * len; /* GRR bugfix */ |
| 1473 | |
| 1474 | srcptr = png_ptr->row_buf + 1 + initial_val; |
| 1475 | dstptr = row + initial_val; |
| 1476 | |
| 1477 | for (i = initial_val; i < final_val; i += stride) |
| 1478 | { |
| 1479 | png_memcpy(dstptr, srcptr, rep_bytes); |
| 1480 | srcptr += stride; |
| 1481 | dstptr += stride; |
| 1482 | } |
| 1483 | if (diff) /* number of leftover pixels: 3 for pngtest */ |
| 1484 | { |
| 1485 | final_val+=diff*BPP8; |
| 1486 | for (; i < final_val; i += stride) |
| 1487 | { |
| 1488 | if (rep_bytes > (int)(final_val-i)) |
| 1489 | rep_bytes = (int)(final_val-i); |
| 1490 | png_memcpy(dstptr, srcptr, rep_bytes); |
| 1491 | srcptr += stride; |
| 1492 | dstptr += stride; |
| 1493 | } |
| 1494 | } |
| 1495 | |
| 1496 | break; |
| 1497 | } /* end 64 bpp */ |
| 1498 | |
| 1499 | default: /* png_ptr->row_info.pixel_depth != 1,2,4,8,16,24,32,48,64 */ |
| 1500 | { |
| 1501 | /* this should never happen */ |
| 1502 | png_warning(png_ptr, "Invalid row_info.pixel_depth in pnggccrd"); |
| 1503 | break; |
| 1504 | } |
| 1505 | } /* end switch (png_ptr->row_info.pixel_depth) */ |
| 1506 | |
| 1507 | } /* end if (non-trivial mask) */ |
| 1508 | |
| 1509 | } /* end png_combine_row() */ |
| 1510 | |
| 1511 | #endif /* PNG_HAVE_MMX_COMBINE_ROW */ |
| 1512 | |
| 1513 | |
| 1514 | |
| 1515 | |
| 1516 | /*===========================================================================*/ |
| 1517 | /* */ |
| 1518 | /* P N G _ D O _ R E A D _ I N T E R L A C E */ |
| 1519 | /* */ |
| 1520 | /*===========================================================================*/ |
| 1521 | |
| 1522 | #if defined(PNG_READ_INTERLACING_SUPPORTED) |
| 1523 | #if defined(PNG_HAVE_MMX_READ_INTERLACE) |
| 1524 | |
| 1525 | /* png_do_read_interlace() is called after any 16-bit to 8-bit conversion |
| 1526 | * has taken place. [GRR: what other steps come before and/or after?] |
| 1527 | */ |
| 1528 | |
| 1529 | void /* PRIVATE */ |
| 1530 | png_do_read_interlace(png_structp png_ptr) |
| 1531 | { |
| 1532 | png_row_infop row_info = &(png_ptr->row_info); |
| 1533 | png_bytep row = png_ptr->row_buf + 1; |
| 1534 | int pass = png_ptr->pass; |
| 1535 | #if defined(PNG_READ_PACKSWAP_SUPPORTED) |
| 1536 | png_uint_32 transformations = png_ptr->transformations; |
| 1537 | #endif |
| 1538 | |
| 1539 | png_debug(1, "in png_do_read_interlace (pnggccrd.c)\n"); |
| 1540 | |
| 1541 | #if defined(PNG_MMX_CODE_SUPPORTED) |
| 1542 | if (_mmx_supported == 2) { |
| 1543 | #if !defined(PNG_1_0_X) |
| 1544 | /* this should have happened in png_init_mmx_flags() already */ |
| 1545 | png_warning(png_ptr, "asm_flags may not have been initialized"); |
| 1546 | #endif |
| 1547 | png_mmx_support(); |
| 1548 | } |
| 1549 | #endif |
| 1550 | |
| 1551 | if (row != NULL && row_info != NULL) |
| 1552 | { |
| 1553 | png_uint_32 final_width; |
| 1554 | |
| 1555 | final_width = row_info->width * png_pass_inc[pass]; |
| 1556 | |
| 1557 | switch (row_info->pixel_depth) |
| 1558 | { |
| 1559 | case 1: |
| 1560 | { |
| 1561 | png_bytep sp, dp; |
| 1562 | int sshift, dshift; |
| 1563 | int s_start, s_end, s_inc; |
| 1564 | png_byte v; |
| 1565 | png_uint_32 i; |
| 1566 | int j; |
| 1567 | |
| 1568 | sp = row + (png_size_t)((row_info->width - 1) >> 3); |
| 1569 | dp = row + (png_size_t)((final_width - 1) >> 3); |
| 1570 | #if defined(PNG_READ_PACKSWAP_SUPPORTED) |
| 1571 | if (transformations & PNG_PACKSWAP) |
| 1572 | { |
| 1573 | sshift = (int)((row_info->width + 7) & 7); |
| 1574 | dshift = (int)((final_width + 7) & 7); |
| 1575 | s_start = 7; |
| 1576 | s_end = 0; |
| 1577 | s_inc = -1; |
| 1578 | } |
| 1579 | else |
| 1580 | #endif |
| 1581 | { |
| 1582 | sshift = 7 - (int)((row_info->width + 7) & 7); |
| 1583 | dshift = 7 - (int)((final_width + 7) & 7); |
| 1584 | s_start = 0; |
| 1585 | s_end = 7; |
| 1586 | s_inc = 1; |
| 1587 | } |
| 1588 | |
| 1589 | for (i = row_info->width; i; i--) |
| 1590 | { |
| 1591 | v = (png_byte)((*sp >> sshift) & 0x1); |
| 1592 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 1593 | { |
| 1594 | *dp &= (png_byte)((0x7f7f >> (7 - dshift)) & 0xff); |
| 1595 | *dp |= (png_byte)(v << dshift); |
| 1596 | if (dshift == s_end) |
| 1597 | { |
| 1598 | dshift = s_start; |
| 1599 | dp--; |
| 1600 | } |
| 1601 | else |
| 1602 | dshift += s_inc; |
| 1603 | } |
| 1604 | if (sshift == s_end) |
| 1605 | { |
| 1606 | sshift = s_start; |
| 1607 | sp--; |
| 1608 | } |
| 1609 | else |
| 1610 | sshift += s_inc; |
| 1611 | } |
| 1612 | break; |
| 1613 | } |
| 1614 | |
| 1615 | case 2: |
| 1616 | { |
| 1617 | png_bytep sp, dp; |
| 1618 | int sshift, dshift; |
| 1619 | int s_start, s_end, s_inc; |
| 1620 | png_uint_32 i; |
| 1621 | |
| 1622 | sp = row + (png_size_t)((row_info->width - 1) >> 2); |
| 1623 | dp = row + (png_size_t)((final_width - 1) >> 2); |
| 1624 | #if defined(PNG_READ_PACKSWAP_SUPPORTED) |
| 1625 | if (transformations & PNG_PACKSWAP) |
| 1626 | { |
| 1627 | sshift = (png_size_t)(((row_info->width + 3) & 3) << 1); |
| 1628 | dshift = (png_size_t)(((final_width + 3) & 3) << 1); |
| 1629 | s_start = 6; |
| 1630 | s_end = 0; |
| 1631 | s_inc = -2; |
| 1632 | } |
| 1633 | else |
| 1634 | #endif |
| 1635 | { |
| 1636 | sshift = (png_size_t)((3 - ((row_info->width + 3) & 3)) << 1); |
| 1637 | dshift = (png_size_t)((3 - ((final_width + 3) & 3)) << 1); |
| 1638 | s_start = 0; |
| 1639 | s_end = 6; |
| 1640 | s_inc = 2; |
| 1641 | } |
| 1642 | |
| 1643 | for (i = row_info->width; i; i--) |
| 1644 | { |
| 1645 | png_byte v; |
| 1646 | int j; |
| 1647 | |
| 1648 | v = (png_byte)((*sp >> sshift) & 0x3); |
| 1649 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 1650 | { |
| 1651 | *dp &= (png_byte)((0x3f3f >> (6 - dshift)) & 0xff); |
| 1652 | *dp |= (png_byte)(v << dshift); |
| 1653 | if (dshift == s_end) |
| 1654 | { |
| 1655 | dshift = s_start; |
| 1656 | dp--; |
| 1657 | } |
| 1658 | else |
| 1659 | dshift += s_inc; |
| 1660 | } |
| 1661 | if (sshift == s_end) |
| 1662 | { |
| 1663 | sshift = s_start; |
| 1664 | sp--; |
| 1665 | } |
| 1666 | else |
| 1667 | sshift += s_inc; |
| 1668 | } |
| 1669 | break; |
| 1670 | } |
| 1671 | |
| 1672 | case 4: |
| 1673 | { |
| 1674 | png_bytep sp, dp; |
| 1675 | int sshift, dshift; |
| 1676 | int s_start, s_end, s_inc; |
| 1677 | png_uint_32 i; |
| 1678 | |
| 1679 | sp = row + (png_size_t)((row_info->width - 1) >> 1); |
| 1680 | dp = row + (png_size_t)((final_width - 1) >> 1); |
| 1681 | #if defined(PNG_READ_PACKSWAP_SUPPORTED) |
| 1682 | if (transformations & PNG_PACKSWAP) |
| 1683 | { |
| 1684 | sshift = (png_size_t)(((row_info->width + 1) & 1) << 2); |
| 1685 | dshift = (png_size_t)(((final_width + 1) & 1) << 2); |
| 1686 | s_start = 4; |
| 1687 | s_end = 0; |
| 1688 | s_inc = -4; |
| 1689 | } |
| 1690 | else |
| 1691 | #endif |
| 1692 | { |
| 1693 | sshift = (png_size_t)((1 - ((row_info->width + 1) & 1)) << 2); |
| 1694 | dshift = (png_size_t)((1 - ((final_width + 1) & 1)) << 2); |
| 1695 | s_start = 0; |
| 1696 | s_end = 4; |
| 1697 | s_inc = 4; |
| 1698 | } |
| 1699 | |
| 1700 | for (i = row_info->width; i; i--) |
| 1701 | { |
| 1702 | png_byte v; |
| 1703 | int j; |
| 1704 | |
| 1705 | v = (png_byte)((*sp >> sshift) & 0xf); |
| 1706 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 1707 | { |
| 1708 | *dp &= (png_byte)((0xf0f >> (4 - dshift)) & 0xff); |
| 1709 | *dp |= (png_byte)(v << dshift); |
| 1710 | if (dshift == s_end) |
| 1711 | { |
| 1712 | dshift = s_start; |
| 1713 | dp--; |
| 1714 | } |
| 1715 | else |
| 1716 | dshift += s_inc; |
| 1717 | } |
| 1718 | if (sshift == s_end) |
| 1719 | { |
| 1720 | sshift = s_start; |
| 1721 | sp--; |
| 1722 | } |
| 1723 | else |
| 1724 | sshift += s_inc; |
| 1725 | } |
| 1726 | break; |
| 1727 | } |
| 1728 | |
| 1729 | /*====================================================================*/ |
| 1730 | |
| 1731 | default: /* 8-bit or larger (this is where the routine is modified) */ |
| 1732 | { |
| 1733 | #if 0 |
| 1734 | // static unsigned long long _const4 = 0x0000000000FFFFFFLL; no good |
| 1735 | // static unsigned long long const4 = 0x0000000000FFFFFFLL; no good |
| 1736 | // unsigned long long _const4 = 0x0000000000FFFFFFLL; no good |
| 1737 | // unsigned long long const4 = 0x0000000000FFFFFFLL; no good |
| 1738 | #endif |
| 1739 | png_bytep sptr, dp; |
| 1740 | png_uint_32 i; |
| 1741 | png_size_t pixel_bytes; |
| 1742 | int width = (int)row_info->width; |
| 1743 | |
| 1744 | pixel_bytes = (row_info->pixel_depth >> 3); |
| 1745 | |
| 1746 | /* point sptr at the last pixel in the pre-expanded row: */ |
| 1747 | sptr = row + (width - 1) * pixel_bytes; |
| 1748 | |
| 1749 | /* point dp at the last pixel position in the expanded row: */ |
| 1750 | dp = row + (final_width - 1) * pixel_bytes; |
| 1751 | |
| 1752 | /* New code by Nirav Chhatrapati - Intel Corporation */ |
| 1753 | |
| 1754 | #if defined(PNG_MMX_CODE_SUPPORTED) |
| 1755 | #if !defined(PNG_1_0_X) |
| 1756 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_INTERLACE) |
| 1757 | /* && _mmx_supported */ ) |
| 1758 | #else |
| 1759 | if (_mmx_supported) |
| 1760 | #endif |
| 1761 | { |
| 1762 | //-------------------------------------------------------------- |
| 1763 | if (pixel_bytes == 3) |
| 1764 | { |
| 1765 | if (((pass == 0) || (pass == 1)) && width) |
| 1766 | { |
| 1767 | int dummy_value_c; // fix 'forbidden register spilled' |
| 1768 | int dummy_value_S; |
| 1769 | int dummy_value_D; |
| 1770 | int dummy_value_a; |
| 1771 | |
| 1772 | __asm__ __volatile__ ( |
| 1773 | "subl $21, %%edi \n\t" |
| 1774 | // (png_pass_inc[pass] - 1)*pixel_bytes |
| 1775 | |
| 1776 | ".loop3_pass0: \n\t" |
| 1777 | "movd (%%esi), %%mm0 \n\t" // x x x x x 2 1 0 |
| 1778 | "pand (%3), %%mm0 \n\t" // z z z z z 2 1 0 |
| 1779 | "movq %%mm0, %%mm1 \n\t" // z z z z z 2 1 0 |
| 1780 | "psllq $16, %%mm0 \n\t" // z z z 2 1 0 z z |
| 1781 | "movq %%mm0, %%mm2 \n\t" // z z z 2 1 0 z z |
| 1782 | "psllq $24, %%mm0 \n\t" // 2 1 0 z z z z z |
| 1783 | "psrlq $8, %%mm1 \n\t" // z z z z z z 2 1 |
| 1784 | "por %%mm2, %%mm0 \n\t" // 2 1 0 2 1 0 z z |
| 1785 | "por %%mm1, %%mm0 \n\t" // 2 1 0 2 1 0 2 1 |
| 1786 | "movq %%mm0, %%mm3 \n\t" // 2 1 0 2 1 0 2 1 |
| 1787 | "psllq $16, %%mm0 \n\t" // 0 2 1 0 2 1 z z |
| 1788 | "movq %%mm3, %%mm4 \n\t" // 2 1 0 2 1 0 2 1 |
| 1789 | "punpckhdq %%mm0, %%mm3 \n\t" // 0 2 1 0 2 1 0 2 |
| 1790 | "movq %%mm4, 16(%%edi) \n\t" |
| 1791 | "psrlq $32, %%mm0 \n\t" // z z z z 0 2 1 0 |
| 1792 | "movq %%mm3, 8(%%edi) \n\t" |
| 1793 | "punpckldq %%mm4, %%mm0 \n\t" // 1 0 2 1 0 2 1 0 |
| 1794 | "subl $3, %%esi \n\t" |
| 1795 | "movq %%mm0, (%%edi) \n\t" |
| 1796 | "subl $24, %%edi \n\t" |
| 1797 | "decl %%ecx \n\t" |
| 1798 | "jnz .loop3_pass0 \n\t" |
| 1799 | "EMMS \n\t" // DONE |
| 1800 | |
| 1801 | : "=c" (dummy_value_c), // output regs (dummy) |
| 1802 | "=S" (dummy_value_S), |
| 1803 | "=D" (dummy_value_D), |
| 1804 | "=a" (dummy_value_a) |
| 1805 | |
| 1806 | |
| 1807 | : "1" (sptr), // esi // input regs |
| 1808 | "2" (dp), // edi |
| 1809 | "0" (width), // ecx |
| 1810 | "3" (&_const4) // %1(?) (0x0000000000FFFFFFLL) |
| 1811 | |
| 1812 | #if 0 /* %mm0, ..., %mm4 not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 1813 | : "%mm0", "%mm1", "%mm2" // clobber list |
| 1814 | , "%mm3", "%mm4" |
| 1815 | #endif |
| 1816 | ); |
| 1817 | } |
| 1818 | else if (((pass == 2) || (pass == 3)) && width) |
| 1819 | { |
| 1820 | int dummy_value_c; // fix 'forbidden register spilled' |
| 1821 | int dummy_value_S; |
| 1822 | int dummy_value_D; |
| 1823 | int dummy_value_a; |
| 1824 | |
| 1825 | __asm__ __volatile__ ( |
| 1826 | "subl $9, %%edi \n\t" |
| 1827 | // (png_pass_inc[pass] - 1)*pixel_bytes |
| 1828 | |
| 1829 | ".loop3_pass2: \n\t" |
| 1830 | "movd (%%esi), %%mm0 \n\t" // x x x x x 2 1 0 |
| 1831 | "pand (%3), %%mm0 \n\t" // z z z z z 2 1 0 |
| 1832 | "movq %%mm0, %%mm1 \n\t" // z z z z z 2 1 0 |
| 1833 | "psllq $16, %%mm0 \n\t" // z z z 2 1 0 z z |
| 1834 | "movq %%mm0, %%mm2 \n\t" // z z z 2 1 0 z z |
| 1835 | "psllq $24, %%mm0 \n\t" // 2 1 0 z z z z z |
| 1836 | "psrlq $8, %%mm1 \n\t" // z z z z z z 2 1 |
| 1837 | "por %%mm2, %%mm0 \n\t" // 2 1 0 2 1 0 z z |
| 1838 | "por %%mm1, %%mm0 \n\t" // 2 1 0 2 1 0 2 1 |
| 1839 | "movq %%mm0, 4(%%edi) \n\t" |
| 1840 | "psrlq $16, %%mm0 \n\t" // z z 2 1 0 2 1 0 |
| 1841 | "subl $3, %%esi \n\t" |
| 1842 | "movd %%mm0, (%%edi) \n\t" |
| 1843 | "subl $12, %%edi \n\t" |
| 1844 | "decl %%ecx \n\t" |
| 1845 | "jnz .loop3_pass2 \n\t" |
| 1846 | "EMMS \n\t" // DONE |
| 1847 | |
| 1848 | : "=c" (dummy_value_c), // output regs (dummy) |
| 1849 | "=S" (dummy_value_S), |
| 1850 | "=D" (dummy_value_D), |
| 1851 | "=a" (dummy_value_a) |
| 1852 | |
| 1853 | : "1" (sptr), // esi // input regs |
| 1854 | "2" (dp), // edi |
| 1855 | "0" (width), // ecx |
| 1856 | "3" (&_const4) // (0x0000000000FFFFFFLL) |
| 1857 | |
| 1858 | #if 0 /* %mm0, ..., %mm2 not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 1859 | : "%mm0", "%mm1", "%mm2" // clobber list |
| 1860 | #endif |
| 1861 | ); |
| 1862 | } |
| 1863 | else if (width) /* && ((pass == 4) || (pass == 5)) */ |
| 1864 | { |
| 1865 | int width_mmx = ((width >> 1) << 1) - 8; // GRR: huh? |
| 1866 | if (width_mmx < 0) |
| 1867 | width_mmx = 0; |
| 1868 | width -= width_mmx; // 8 or 9 pix, 24 or 27 bytes |
| 1869 | if (width_mmx) |
| 1870 | { |
| 1871 | // png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; |
| 1872 | // sptr points at last pixel in pre-expanded row |
| 1873 | // dp points at last pixel position in expanded row |
| 1874 | int dummy_value_c; // fix 'forbidden register spilled' |
| 1875 | int dummy_value_S; |
| 1876 | int dummy_value_D; |
| 1877 | int dummy_value_a; |
| 1878 | int dummy_value_d; |
| 1879 | |
| 1880 | __asm__ __volatile__ ( |
| 1881 | "subl $3, %%esi \n\t" |
| 1882 | "subl $9, %%edi \n\t" |
| 1883 | // (png_pass_inc[pass] + 1)*pixel_bytes |
| 1884 | |
| 1885 | ".loop3_pass4: \n\t" |
| 1886 | "movq (%%esi), %%mm0 \n\t" // x x 5 4 3 2 1 0 |
| 1887 | "movq %%mm0, %%mm1 \n\t" // x x 5 4 3 2 1 0 |
| 1888 | "movq %%mm0, %%mm2 \n\t" // x x 5 4 3 2 1 0 |
| 1889 | "psllq $24, %%mm0 \n\t" // 4 3 2 1 0 z z z |
| 1890 | "pand (%3), %%mm1 \n\t" // z z z z z 2 1 0 |
| 1891 | "psrlq $24, %%mm2 \n\t" // z z z x x 5 4 3 |
| 1892 | "por %%mm1, %%mm0 \n\t" // 4 3 2 1 0 2 1 0 |
| 1893 | "movq %%mm2, %%mm3 \n\t" // z z z x x 5 4 3 |
| 1894 | "psllq $8, %%mm2 \n\t" // z z x x 5 4 3 z |
| 1895 | "movq %%mm0, (%%edi) \n\t" |
| 1896 | "psrlq $16, %%mm3 \n\t" // z z z z z x x 5 |
| 1897 | "pand (%4), %%mm3 \n\t" // z z z z z z z 5 |
| 1898 | "por %%mm3, %%mm2 \n\t" // z z x x 5 4 3 5 |
| 1899 | "subl $6, %%esi \n\t" |
| 1900 | "movd %%mm2, 8(%%edi) \n\t" |
| 1901 | "subl $12, %%edi \n\t" |
| 1902 | "subl $2, %%ecx \n\t" |
| 1903 | "jnz .loop3_pass4 \n\t" |
| 1904 | "EMMS \n\t" // DONE |
| 1905 | |
| 1906 | : "=c" (dummy_value_c), // output regs (dummy) |
| 1907 | "=S" (dummy_value_S), |
| 1908 | "=D" (dummy_value_D), |
| 1909 | "=a" (dummy_value_a), |
| 1910 | "=d" (dummy_value_d) |
| 1911 | |
| 1912 | : "1" (sptr), // esi // input regs |
| 1913 | "2" (dp), // edi |
| 1914 | "0" (width_mmx), // ecx |
| 1915 | "3" (&_const4), // 0x0000000000FFFFFFLL |
| 1916 | "4" (&_const6) // 0x00000000000000FFLL |
| 1917 | |
| 1918 | #if 0 /* %mm0, ..., %mm3 not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 1919 | : "%mm0", "%mm1" // clobber list |
| 1920 | , "%mm2", "%mm3" |
| 1921 | #endif |
| 1922 | ); |
| 1923 | } |
| 1924 | |
| 1925 | sptr -= width_mmx*3; |
| 1926 | dp -= width_mmx*6; |
| 1927 | for (i = width; i; i--) |
| 1928 | { |
| 1929 | png_byte v[8]; |
| 1930 | int j; |
| 1931 | |
| 1932 | png_memcpy(v, sptr, 3); |
| 1933 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 1934 | { |
| 1935 | png_memcpy(dp, v, 3); |
| 1936 | dp -= 3; |
| 1937 | } |
| 1938 | sptr -= 3; |
| 1939 | } |
| 1940 | } |
| 1941 | } /* end of pixel_bytes == 3 */ |
| 1942 | |
| 1943 | //-------------------------------------------------------------- |
| 1944 | else if (pixel_bytes == 1) |
| 1945 | { |
| 1946 | if (((pass == 0) || (pass == 1)) && width) |
| 1947 | { |
| 1948 | int width_mmx = ((width >> 2) << 2); |
| 1949 | width -= width_mmx; // 0-3 pixels => 0-3 bytes |
| 1950 | if (width_mmx) |
| 1951 | { |
| 1952 | int dummy_value_c; // fix 'forbidden register spilled' |
| 1953 | int dummy_value_S; |
| 1954 | int dummy_value_D; |
| 1955 | |
| 1956 | __asm__ __volatile__ ( |
| 1957 | "subl $3, %%esi \n\t" |
| 1958 | "subl $31, %%edi \n\t" |
| 1959 | |
| 1960 | ".loop1_pass0: \n\t" |
| 1961 | "movd (%%esi), %%mm0 \n\t" // x x x x 3 2 1 0 |
| 1962 | "movq %%mm0, %%mm1 \n\t" // x x x x 3 2 1 0 |
| 1963 | "punpcklbw %%mm0, %%mm0 \n\t" // 3 3 2 2 1 1 0 0 |
| 1964 | "movq %%mm0, %%mm2 \n\t" // 3 3 2 2 1 1 0 0 |
| 1965 | "punpcklwd %%mm0, %%mm0 \n\t" // 1 1 1 1 0 0 0 0 |
| 1966 | "movq %%mm0, %%mm3 \n\t" // 1 1 1 1 0 0 0 0 |
| 1967 | "punpckldq %%mm0, %%mm0 \n\t" // 0 0 0 0 0 0 0 0 |
| 1968 | "punpckhdq %%mm3, %%mm3 \n\t" // 1 1 1 1 1 1 1 1 |
| 1969 | "movq %%mm0, (%%edi) \n\t" |
| 1970 | "punpckhwd %%mm2, %%mm2 \n\t" // 3 3 3 3 2 2 2 2 |
| 1971 | "movq %%mm3, 8(%%edi) \n\t" |
| 1972 | "movq %%mm2, %%mm4 \n\t" // 3 3 3 3 2 2 2 2 |
| 1973 | "punpckldq %%mm2, %%mm2 \n\t" // 2 2 2 2 2 2 2 2 |
| 1974 | "punpckhdq %%mm4, %%mm4 \n\t" // 3 3 3 3 3 3 3 3 |
| 1975 | "movq %%mm2, 16(%%edi) \n\t" |
| 1976 | "subl $4, %%esi \n\t" |
| 1977 | "movq %%mm4, 24(%%edi) \n\t" |
| 1978 | "subl $32, %%edi \n\t" |
| 1979 | "subl $4, %%ecx \n\t" |
| 1980 | "jnz .loop1_pass0 \n\t" |
| 1981 | "EMMS \n\t" // DONE |
| 1982 | |
| 1983 | : "=c" (dummy_value_c), // output regs (dummy) |
| 1984 | "=S" (dummy_value_S), |
| 1985 | "=D" (dummy_value_D) |
| 1986 | |
| 1987 | : "1" (sptr), // esi // input regs |
| 1988 | "2" (dp), // edi |
| 1989 | "0" (width_mmx) // ecx |
| 1990 | |
| 1991 | #if 0 /* %mm0, ..., %mm4 not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 1992 | : "%mm0", "%mm1", "%mm2" // clobber list |
| 1993 | , "%mm3", "%mm4" |
| 1994 | #endif |
| 1995 | ); |
| 1996 | } |
| 1997 | |
| 1998 | sptr -= width_mmx; |
| 1999 | dp -= width_mmx*8; |
| 2000 | for (i = width; i; i--) |
| 2001 | { |
| 2002 | int j; |
| 2003 | |
| 2004 | /* I simplified this part in version 1.0.4e |
| 2005 | * here and in several other instances where |
| 2006 | * pixel_bytes == 1 -- GR-P |
| 2007 | * |
| 2008 | * Original code: |
| 2009 | * |
| 2010 | * png_byte v[8]; |
| 2011 | * png_memcpy(v, sptr, pixel_bytes); |
| 2012 | * for (j = 0; j < png_pass_inc[pass]; j++) |
| 2013 | * { |
| 2014 | * png_memcpy(dp, v, pixel_bytes); |
| 2015 | * dp -= pixel_bytes; |
| 2016 | * } |
| 2017 | * sptr -= pixel_bytes; |
| 2018 | * |
| 2019 | * Replacement code is in the next three lines: |
| 2020 | */ |
| 2021 | |
| 2022 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 2023 | { |
| 2024 | *dp-- = *sptr; |
| 2025 | } |
| 2026 | --sptr; |
| 2027 | } |
| 2028 | } |
| 2029 | else if (((pass == 2) || (pass == 3)) && width) |
| 2030 | { |
| 2031 | int width_mmx = ((width >> 2) << 2); |
| 2032 | width -= width_mmx; // 0-3 pixels => 0-3 bytes |
| 2033 | if (width_mmx) |
| 2034 | { |
| 2035 | int dummy_value_c; // fix 'forbidden register spilled' |
| 2036 | int dummy_value_S; |
| 2037 | int dummy_value_D; |
| 2038 | |
| 2039 | __asm__ __volatile__ ( |
| 2040 | "subl $3, %%esi \n\t" |
| 2041 | "subl $15, %%edi \n\t" |
| 2042 | |
| 2043 | ".loop1_pass2: \n\t" |
| 2044 | "movd (%%esi), %%mm0 \n\t" // x x x x 3 2 1 0 |
| 2045 | "punpcklbw %%mm0, %%mm0 \n\t" // 3 3 2 2 1 1 0 0 |
| 2046 | "movq %%mm0, %%mm1 \n\t" // 3 3 2 2 1 1 0 0 |
| 2047 | "punpcklwd %%mm0, %%mm0 \n\t" // 1 1 1 1 0 0 0 0 |
| 2048 | "punpckhwd %%mm1, %%mm1 \n\t" // 3 3 3 3 2 2 2 2 |
| 2049 | "movq %%mm0, (%%edi) \n\t" |
| 2050 | "subl $4, %%esi \n\t" |
| 2051 | "movq %%mm1, 8(%%edi) \n\t" |
| 2052 | "subl $16, %%edi \n\t" |
| 2053 | "subl $4, %%ecx \n\t" |
| 2054 | "jnz .loop1_pass2 \n\t" |
| 2055 | "EMMS \n\t" // DONE |
| 2056 | |
| 2057 | : "=c" (dummy_value_c), // output regs (dummy) |
| 2058 | "=S" (dummy_value_S), |
| 2059 | "=D" (dummy_value_D) |
| 2060 | |
| 2061 | : "1" (sptr), // esi // input regs |
| 2062 | "2" (dp), // edi |
| 2063 | "0" (width_mmx) // ecx |
| 2064 | |
| 2065 | #if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 2066 | : "%mm0", "%mm1" // clobber list |
| 2067 | #endif |
| 2068 | ); |
| 2069 | } |
| 2070 | |
| 2071 | sptr -= width_mmx; |
| 2072 | dp -= width_mmx*4; |
| 2073 | for (i = width; i; i--) |
| 2074 | { |
| 2075 | int j; |
| 2076 | |
| 2077 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 2078 | { |
| 2079 | *dp-- = *sptr; |
| 2080 | } |
| 2081 | --sptr; |
| 2082 | } |
| 2083 | } |
| 2084 | else if (width) /* && ((pass == 4) || (pass == 5)) */ |
| 2085 | { |
| 2086 | int width_mmx = ((width >> 3) << 3); |
| 2087 | width -= width_mmx; // 0-3 pixels => 0-3 bytes |
| 2088 | if (width_mmx) |
| 2089 | { |
| 2090 | int dummy_value_c; // fix 'forbidden register spilled' |
| 2091 | int dummy_value_S; |
| 2092 | int dummy_value_D; |
| 2093 | |
| 2094 | __asm__ __volatile__ ( |
| 2095 | "subl $7, %%esi \n\t" |
| 2096 | "subl $15, %%edi \n\t" |
| 2097 | |
| 2098 | ".loop1_pass4: \n\t" |
| 2099 | "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0 |
| 2100 | "movq %%mm0, %%mm1 \n\t" // 7 6 5 4 3 2 1 0 |
| 2101 | "punpcklbw %%mm0, %%mm0 \n\t" // 3 3 2 2 1 1 0 0 |
| 2102 | "punpckhbw %%mm1, %%mm1 \n\t" // 7 7 6 6 5 5 4 4 |
| 2103 | "movq %%mm1, 8(%%edi) \n\t" |
| 2104 | "subl $8, %%esi \n\t" |
| 2105 | "movq %%mm0, (%%edi) \n\t" |
| 2106 | "subl $16, %%edi \n\t" |
| 2107 | "subl $8, %%ecx \n\t" |
| 2108 | "jnz .loop1_pass4 \n\t" |
| 2109 | "EMMS \n\t" // DONE |
| 2110 | |
| 2111 | : "=c" (dummy_value_c), // output regs (none) |
| 2112 | "=S" (dummy_value_S), |
| 2113 | "=D" (dummy_value_D) |
| 2114 | |
| 2115 | : "1" (sptr), // esi // input regs |
| 2116 | "2" (dp), // edi |
| 2117 | "0" (width_mmx) // ecx |
| 2118 | |
| 2119 | #if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 2120 | : "%mm0", "%mm1" // clobber list |
| 2121 | #endif |
| 2122 | ); |
| 2123 | } |
| 2124 | |
| 2125 | sptr -= width_mmx; |
| 2126 | dp -= width_mmx*2; |
| 2127 | for (i = width; i; i--) |
| 2128 | { |
| 2129 | int j; |
| 2130 | |
| 2131 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 2132 | { |
| 2133 | *dp-- = *sptr; |
| 2134 | } |
| 2135 | --sptr; |
| 2136 | } |
| 2137 | } |
| 2138 | } /* end of pixel_bytes == 1 */ |
| 2139 | |
| 2140 | //-------------------------------------------------------------- |
| 2141 | else if (pixel_bytes == 2) |
| 2142 | { |
| 2143 | if (((pass == 0) || (pass == 1)) && width) |
| 2144 | { |
| 2145 | int width_mmx = ((width >> 1) << 1); |
| 2146 | width -= width_mmx; // 0,1 pixels => 0,2 bytes |
| 2147 | if (width_mmx) |
| 2148 | { |
| 2149 | int dummy_value_c; // fix 'forbidden register spilled' |
| 2150 | int dummy_value_S; |
| 2151 | int dummy_value_D; |
| 2152 | |
| 2153 | __asm__ __volatile__ ( |
| 2154 | "subl $2, %%esi \n\t" |
| 2155 | "subl $30, %%edi \n\t" |
| 2156 | |
| 2157 | ".loop2_pass0: \n\t" |
| 2158 | "movd (%%esi), %%mm0 \n\t" // x x x x 3 2 1 0 |
| 2159 | "punpcklwd %%mm0, %%mm0 \n\t" // 3 2 3 2 1 0 1 0 |
| 2160 | "movq %%mm0, %%mm1 \n\t" // 3 2 3 2 1 0 1 0 |
| 2161 | "punpckldq %%mm0, %%mm0 \n\t" // 1 0 1 0 1 0 1 0 |
| 2162 | "punpckhdq %%mm1, %%mm1 \n\t" // 3 2 3 2 3 2 3 2 |
| 2163 | "movq %%mm0, (%%edi) \n\t" |
| 2164 | "movq %%mm0, 8(%%edi) \n\t" |
| 2165 | "movq %%mm1, 16(%%edi) \n\t" |
| 2166 | "subl $4, %%esi \n\t" |
| 2167 | "movq %%mm1, 24(%%edi) \n\t" |
| 2168 | "subl $32, %%edi \n\t" |
| 2169 | "subl $2, %%ecx \n\t" |
| 2170 | "jnz .loop2_pass0 \n\t" |
| 2171 | "EMMS \n\t" // DONE |
| 2172 | |
| 2173 | : "=c" (dummy_value_c), // output regs (dummy) |
| 2174 | "=S" (dummy_value_S), |
| 2175 | "=D" (dummy_value_D) |
| 2176 | |
| 2177 | : "1" (sptr), // esi // input regs |
| 2178 | "2" (dp), // edi |
| 2179 | "0" (width_mmx) // ecx |
| 2180 | |
| 2181 | #if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 2182 | : "%mm0", "%mm1" // clobber list |
| 2183 | #endif |
| 2184 | ); |
| 2185 | } |
| 2186 | |
| 2187 | sptr -= (width_mmx*2 - 2); // sign fixed |
| 2188 | dp -= (width_mmx*16 - 2); // sign fixed |
| 2189 | for (i = width; i; i--) |
| 2190 | { |
| 2191 | png_byte v[8]; |
| 2192 | int j; |
| 2193 | sptr -= 2; |
| 2194 | png_memcpy(v, sptr, 2); |
| 2195 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 2196 | { |
| 2197 | dp -= 2; |
| 2198 | png_memcpy(dp, v, 2); |
| 2199 | } |
| 2200 | } |
| 2201 | } |
| 2202 | else if (((pass == 2) || (pass == 3)) && width) |
| 2203 | { |
| 2204 | int width_mmx = ((width >> 1) << 1) ; |
| 2205 | width -= width_mmx; // 0,1 pixels => 0,2 bytes |
| 2206 | if (width_mmx) |
| 2207 | { |
| 2208 | int dummy_value_c; // fix 'forbidden register spilled' |
| 2209 | int dummy_value_S; |
| 2210 | int dummy_value_D; |
| 2211 | |
| 2212 | __asm__ __volatile__ ( |
| 2213 | "subl $2, %%esi \n\t" |
| 2214 | "subl $14, %%edi \n\t" |
| 2215 | |
| 2216 | ".loop2_pass2: \n\t" |
| 2217 | "movd (%%esi), %%mm0 \n\t" // x x x x 3 2 1 0 |
| 2218 | "punpcklwd %%mm0, %%mm0 \n\t" // 3 2 3 2 1 0 1 0 |
| 2219 | "movq %%mm0, %%mm1 \n\t" // 3 2 3 2 1 0 1 0 |
| 2220 | "punpckldq %%mm0, %%mm0 \n\t" // 1 0 1 0 1 0 1 0 |
| 2221 | "punpckhdq %%mm1, %%mm1 \n\t" // 3 2 3 2 3 2 3 2 |
| 2222 | "movq %%mm0, (%%edi) \n\t" |
| 2223 | "subl $4, %%esi \n\t" |
| 2224 | "movq %%mm1, 8(%%edi) \n\t" |
| 2225 | "subl $16, %%edi \n\t" |
| 2226 | "subl $2, %%ecx \n\t" |
| 2227 | "jnz .loop2_pass2 \n\t" |
| 2228 | "EMMS \n\t" // DONE |
| 2229 | |
| 2230 | : "=c" (dummy_value_c), // output regs (dummy) |
| 2231 | "=S" (dummy_value_S), |
| 2232 | "=D" (dummy_value_D) |
| 2233 | |
| 2234 | : "1" (sptr), // esi // input regs |
| 2235 | "2" (dp), // edi |
| 2236 | "0" (width_mmx) // ecx |
| 2237 | |
| 2238 | #if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 2239 | : "%mm0", "%mm1" // clobber list |
| 2240 | #endif |
| 2241 | ); |
| 2242 | } |
| 2243 | |
| 2244 | sptr -= (width_mmx*2 - 2); // sign fixed |
| 2245 | dp -= (width_mmx*8 - 2); // sign fixed |
| 2246 | for (i = width; i; i--) |
| 2247 | { |
| 2248 | png_byte v[8]; |
| 2249 | int j; |
| 2250 | sptr -= 2; |
| 2251 | png_memcpy(v, sptr, 2); |
| 2252 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 2253 | { |
| 2254 | dp -= 2; |
| 2255 | png_memcpy(dp, v, 2); |
| 2256 | } |
| 2257 | } |
| 2258 | } |
| 2259 | else if (width) // pass == 4 or 5 |
| 2260 | { |
| 2261 | int width_mmx = ((width >> 1) << 1) ; |
| 2262 | width -= width_mmx; // 0,1 pixels => 0,2 bytes |
| 2263 | if (width_mmx) |
| 2264 | { |
| 2265 | int dummy_value_c; // fix 'forbidden register spilled' |
| 2266 | int dummy_value_S; |
| 2267 | int dummy_value_D; |
| 2268 | |
| 2269 | __asm__ __volatile__ ( |
| 2270 | "subl $2, %%esi \n\t" |
| 2271 | "subl $6, %%edi \n\t" |
| 2272 | |
| 2273 | ".loop2_pass4: \n\t" |
| 2274 | "movd (%%esi), %%mm0 \n\t" // x x x x 3 2 1 0 |
| 2275 | "punpcklwd %%mm0, %%mm0 \n\t" // 3 2 3 2 1 0 1 0 |
| 2276 | "subl $4, %%esi \n\t" |
| 2277 | "movq %%mm0, (%%edi) \n\t" |
| 2278 | "subl $8, %%edi \n\t" |
| 2279 | "subl $2, %%ecx \n\t" |
| 2280 | "jnz .loop2_pass4 \n\t" |
| 2281 | "EMMS \n\t" // DONE |
| 2282 | |
| 2283 | : "=c" (dummy_value_c), // output regs (dummy) |
| 2284 | "=S" (dummy_value_S), |
| 2285 | "=D" (dummy_value_D) |
| 2286 | |
| 2287 | : "1" (sptr), // esi // input regs |
| 2288 | "2" (dp), // edi |
| 2289 | "0" (width_mmx) // ecx |
| 2290 | |
| 2291 | #if 0 /* %mm0 not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 2292 | : "%mm0" // clobber list |
| 2293 | #endif |
| 2294 | ); |
| 2295 | } |
| 2296 | |
| 2297 | sptr -= (width_mmx*2 - 2); // sign fixed |
| 2298 | dp -= (width_mmx*4 - 2); // sign fixed |
| 2299 | for (i = width; i; i--) |
| 2300 | { |
| 2301 | png_byte v[8]; |
| 2302 | int j; |
| 2303 | sptr -= 2; |
| 2304 | png_memcpy(v, sptr, 2); |
| 2305 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 2306 | { |
| 2307 | dp -= 2; |
| 2308 | png_memcpy(dp, v, 2); |
| 2309 | } |
| 2310 | } |
| 2311 | } |
| 2312 | } /* end of pixel_bytes == 2 */ |
| 2313 | |
| 2314 | //-------------------------------------------------------------- |
| 2315 | else if (pixel_bytes == 4) |
| 2316 | { |
| 2317 | if (((pass == 0) || (pass == 1)) && width) |
| 2318 | { |
| 2319 | int width_mmx = ((width >> 1) << 1); |
| 2320 | width -= width_mmx; // 0,1 pixels => 0,4 bytes |
| 2321 | if (width_mmx) |
| 2322 | { |
| 2323 | int dummy_value_c; // fix 'forbidden register spilled' |
| 2324 | int dummy_value_S; |
| 2325 | int dummy_value_D; |
| 2326 | |
| 2327 | __asm__ __volatile__ ( |
| 2328 | "subl $4, %%esi \n\t" |
| 2329 | "subl $60, %%edi \n\t" |
| 2330 | |
| 2331 | ".loop4_pass0: \n\t" |
| 2332 | "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0 |
| 2333 | "movq %%mm0, %%mm1 \n\t" // 7 6 5 4 3 2 1 0 |
| 2334 | "punpckldq %%mm0, %%mm0 \n\t" // 3 2 1 0 3 2 1 0 |
| 2335 | "punpckhdq %%mm1, %%mm1 \n\t" // 7 6 5 4 7 6 5 4 |
| 2336 | "movq %%mm0, (%%edi) \n\t" |
| 2337 | "movq %%mm0, 8(%%edi) \n\t" |
| 2338 | "movq %%mm0, 16(%%edi) \n\t" |
| 2339 | "movq %%mm0, 24(%%edi) \n\t" |
| 2340 | "movq %%mm1, 32(%%edi) \n\t" |
| 2341 | "movq %%mm1, 40(%%edi) \n\t" |
| 2342 | "movq %%mm1, 48(%%edi) \n\t" |
| 2343 | "subl $8, %%esi \n\t" |
| 2344 | "movq %%mm1, 56(%%edi) \n\t" |
| 2345 | "subl $64, %%edi \n\t" |
| 2346 | "subl $2, %%ecx \n\t" |
| 2347 | "jnz .loop4_pass0 \n\t" |
| 2348 | "EMMS \n\t" // DONE |
| 2349 | |
| 2350 | : "=c" (dummy_value_c), // output regs (dummy) |
| 2351 | "=S" (dummy_value_S), |
| 2352 | "=D" (dummy_value_D) |
| 2353 | |
| 2354 | : "1" (sptr), // esi // input regs |
| 2355 | "2" (dp), // edi |
| 2356 | "0" (width_mmx) // ecx |
| 2357 | |
| 2358 | #if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 2359 | : "%mm0", "%mm1" // clobber list |
| 2360 | #endif |
| 2361 | ); |
| 2362 | } |
| 2363 | |
| 2364 | sptr -= (width_mmx*4 - 4); // sign fixed |
| 2365 | dp -= (width_mmx*32 - 4); // sign fixed |
| 2366 | for (i = width; i; i--) |
| 2367 | { |
| 2368 | png_byte v[8]; |
| 2369 | int j; |
| 2370 | sptr -= 4; |
| 2371 | png_memcpy(v, sptr, 4); |
| 2372 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 2373 | { |
| 2374 | dp -= 4; |
| 2375 | png_memcpy(dp, v, 4); |
| 2376 | } |
| 2377 | } |
| 2378 | } |
| 2379 | else if (((pass == 2) || (pass == 3)) && width) |
| 2380 | { |
| 2381 | int width_mmx = ((width >> 1) << 1); |
| 2382 | width -= width_mmx; // 0,1 pixels => 0,4 bytes |
| 2383 | if (width_mmx) |
| 2384 | { |
| 2385 | int dummy_value_c; // fix 'forbidden register spilled' |
| 2386 | int dummy_value_S; |
| 2387 | int dummy_value_D; |
| 2388 | |
| 2389 | __asm__ __volatile__ ( |
| 2390 | "subl $4, %%esi \n\t" |
| 2391 | "subl $28, %%edi \n\t" |
| 2392 | |
| 2393 | ".loop4_pass2: \n\t" |
| 2394 | "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0 |
| 2395 | "movq %%mm0, %%mm1 \n\t" // 7 6 5 4 3 2 1 0 |
| 2396 | "punpckldq %%mm0, %%mm0 \n\t" // 3 2 1 0 3 2 1 0 |
| 2397 | "punpckhdq %%mm1, %%mm1 \n\t" // 7 6 5 4 7 6 5 4 |
| 2398 | "movq %%mm0, (%%edi) \n\t" |
| 2399 | "movq %%mm0, 8(%%edi) \n\t" |
| 2400 | "movq %%mm1, 16(%%edi) \n\t" |
| 2401 | "movq %%mm1, 24(%%edi) \n\t" |
| 2402 | "subl $8, %%esi \n\t" |
| 2403 | "subl $32, %%edi \n\t" |
| 2404 | "subl $2, %%ecx \n\t" |
| 2405 | "jnz .loop4_pass2 \n\t" |
| 2406 | "EMMS \n\t" // DONE |
| 2407 | |
| 2408 | : "=c" (dummy_value_c), // output regs (dummy) |
| 2409 | "=S" (dummy_value_S), |
| 2410 | "=D" (dummy_value_D) |
| 2411 | |
| 2412 | : "1" (sptr), // esi // input regs |
| 2413 | "2" (dp), // edi |
| 2414 | "0" (width_mmx) // ecx |
| 2415 | |
| 2416 | #if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 2417 | : "%mm0", "%mm1" // clobber list |
| 2418 | #endif |
| 2419 | ); |
| 2420 | } |
| 2421 | |
| 2422 | sptr -= (width_mmx*4 - 4); // sign fixed |
| 2423 | dp -= (width_mmx*16 - 4); // sign fixed |
| 2424 | for (i = width; i; i--) |
| 2425 | { |
| 2426 | png_byte v[8]; |
| 2427 | int j; |
| 2428 | sptr -= 4; |
| 2429 | png_memcpy(v, sptr, 4); |
| 2430 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 2431 | { |
| 2432 | dp -= 4; |
| 2433 | png_memcpy(dp, v, 4); |
| 2434 | } |
| 2435 | } |
| 2436 | } |
| 2437 | else if (width) // pass == 4 or 5 |
| 2438 | { |
| 2439 | int width_mmx = ((width >> 1) << 1) ; |
| 2440 | width -= width_mmx; // 0,1 pixels => 0,4 bytes |
| 2441 | if (width_mmx) |
| 2442 | { |
| 2443 | int dummy_value_c; // fix 'forbidden register spilled' |
| 2444 | int dummy_value_S; |
| 2445 | int dummy_value_D; |
| 2446 | |
| 2447 | __asm__ __volatile__ ( |
| 2448 | "subl $4, %%esi \n\t" |
| 2449 | "subl $12, %%edi \n\t" |
| 2450 | |
| 2451 | ".loop4_pass4: \n\t" |
| 2452 | "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0 |
| 2453 | "movq %%mm0, %%mm1 \n\t" // 7 6 5 4 3 2 1 0 |
| 2454 | "punpckldq %%mm0, %%mm0 \n\t" // 3 2 1 0 3 2 1 0 |
| 2455 | "punpckhdq %%mm1, %%mm1 \n\t" // 7 6 5 4 7 6 5 4 |
| 2456 | "movq %%mm0, (%%edi) \n\t" |
| 2457 | "subl $8, %%esi \n\t" |
| 2458 | "movq %%mm1, 8(%%edi) \n\t" |
| 2459 | "subl $16, %%edi \n\t" |
| 2460 | "subl $2, %%ecx \n\t" |
| 2461 | "jnz .loop4_pass4 \n\t" |
| 2462 | "EMMS \n\t" // DONE |
| 2463 | |
| 2464 | : "=c" (dummy_value_c), // output regs (dummy) |
| 2465 | "=S" (dummy_value_S), |
| 2466 | "=D" (dummy_value_D) |
| 2467 | |
| 2468 | : "1" (sptr), // esi // input regs |
| 2469 | "2" (dp), // edi |
| 2470 | "0" (width_mmx) // ecx |
| 2471 | |
| 2472 | #if 0 /* %mm0, %mm1 not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 2473 | : "%mm0", "%mm1" // clobber list |
| 2474 | #endif |
| 2475 | ); |
| 2476 | } |
| 2477 | |
| 2478 | sptr -= (width_mmx*4 - 4); // sign fixed |
| 2479 | dp -= (width_mmx*8 - 4); // sign fixed |
| 2480 | for (i = width; i; i--) |
| 2481 | { |
| 2482 | png_byte v[8]; |
| 2483 | int j; |
| 2484 | sptr -= 4; |
| 2485 | png_memcpy(v, sptr, 4); |
| 2486 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 2487 | { |
| 2488 | dp -= 4; |
| 2489 | png_memcpy(dp, v, 4); |
| 2490 | } |
| 2491 | } |
| 2492 | } |
| 2493 | } /* end of pixel_bytes == 4 */ |
| 2494 | |
| 2495 | //-------------------------------------------------------------- |
| 2496 | else if (pixel_bytes == 8) |
| 2497 | { |
| 2498 | // GRR TEST: should work, but needs testing (special 64-bit version of rpng2?) |
| 2499 | // GRR NOTE: no need to combine passes here! |
| 2500 | if (((pass == 0) || (pass == 1)) && width) |
| 2501 | { |
| 2502 | int dummy_value_c; // fix 'forbidden register spilled' |
| 2503 | int dummy_value_S; |
| 2504 | int dummy_value_D; |
| 2505 | |
| 2506 | // source is 8-byte RRGGBBAA |
| 2507 | // dest is 64-byte RRGGBBAA RRGGBBAA RRGGBBAA RRGGBBAA ... |
| 2508 | __asm__ __volatile__ ( |
| 2509 | "subl $56, %%edi \n\t" // start of last block |
| 2510 | |
| 2511 | ".loop8_pass0: \n\t" |
| 2512 | "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0 |
| 2513 | "movq %%mm0, (%%edi) \n\t" |
| 2514 | "movq %%mm0, 8(%%edi) \n\t" |
| 2515 | "movq %%mm0, 16(%%edi) \n\t" |
| 2516 | "movq %%mm0, 24(%%edi) \n\t" |
| 2517 | "movq %%mm0, 32(%%edi) \n\t" |
| 2518 | "movq %%mm0, 40(%%edi) \n\t" |
| 2519 | "movq %%mm0, 48(%%edi) \n\t" |
| 2520 | "subl $8, %%esi \n\t" |
| 2521 | "movq %%mm0, 56(%%edi) \n\t" |
| 2522 | "subl $64, %%edi \n\t" |
| 2523 | "decl %%ecx \n\t" |
| 2524 | "jnz .loop8_pass0 \n\t" |
| 2525 | "EMMS \n\t" // DONE |
| 2526 | |
| 2527 | : "=c" (dummy_value_c), // output regs (dummy) |
| 2528 | "=S" (dummy_value_S), |
| 2529 | "=D" (dummy_value_D) |
| 2530 | |
| 2531 | : "1" (sptr), // esi // input regs |
| 2532 | "2" (dp), // edi |
| 2533 | "0" (width) // ecx |
| 2534 | |
| 2535 | #if 0 /* %mm0 not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 2536 | : "%mm0" // clobber list |
| 2537 | #endif |
| 2538 | ); |
| 2539 | } |
| 2540 | else if (((pass == 2) || (pass == 3)) && width) |
| 2541 | { |
| 2542 | // source is 8-byte RRGGBBAA |
| 2543 | // dest is 32-byte RRGGBBAA RRGGBBAA RRGGBBAA RRGGBBAA |
| 2544 | // (recall that expansion is _in place_: sptr and dp |
| 2545 | // both point at locations within same row buffer) |
| 2546 | { |
| 2547 | int dummy_value_c; // fix 'forbidden register spilled' |
| 2548 | int dummy_value_S; |
| 2549 | int dummy_value_D; |
| 2550 | |
| 2551 | __asm__ __volatile__ ( |
| 2552 | "subl $24, %%edi \n\t" // start of last block |
| 2553 | |
| 2554 | ".loop8_pass2: \n\t" |
| 2555 | "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0 |
| 2556 | "movq %%mm0, (%%edi) \n\t" |
| 2557 | "movq %%mm0, 8(%%edi) \n\t" |
| 2558 | "movq %%mm0, 16(%%edi) \n\t" |
| 2559 | "subl $8, %%esi \n\t" |
| 2560 | "movq %%mm0, 24(%%edi) \n\t" |
| 2561 | "subl $32, %%edi \n\t" |
| 2562 | "decl %%ecx \n\t" |
| 2563 | "jnz .loop8_pass2 \n\t" |
| 2564 | "EMMS \n\t" // DONE |
| 2565 | |
| 2566 | : "=c" (dummy_value_c), // output regs (dummy) |
| 2567 | "=S" (dummy_value_S), |
| 2568 | "=D" (dummy_value_D) |
| 2569 | |
| 2570 | : "1" (sptr), // esi // input regs |
| 2571 | "2" (dp), // edi |
| 2572 | "0" (width) // ecx |
| 2573 | |
| 2574 | #if 0 /* %mm0 not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 2575 | : "%mm0" // clobber list |
| 2576 | #endif |
| 2577 | ); |
| 2578 | } |
| 2579 | } |
| 2580 | else if (width) // pass == 4 or 5 |
| 2581 | { |
| 2582 | // source is 8-byte RRGGBBAA |
| 2583 | // dest is 16-byte RRGGBBAA RRGGBBAA |
| 2584 | { |
| 2585 | int dummy_value_c; // fix 'forbidden register spilled' |
| 2586 | int dummy_value_S; |
| 2587 | int dummy_value_D; |
| 2588 | |
| 2589 | __asm__ __volatile__ ( |
| 2590 | "subl $8, %%edi \n\t" // start of last block |
| 2591 | |
| 2592 | ".loop8_pass4: \n\t" |
| 2593 | "movq (%%esi), %%mm0 \n\t" // 7 6 5 4 3 2 1 0 |
| 2594 | "movq %%mm0, (%%edi) \n\t" |
| 2595 | "subl $8, %%esi \n\t" |
| 2596 | "movq %%mm0, 8(%%edi) \n\t" |
| 2597 | "subl $16, %%edi \n\t" |
| 2598 | "decl %%ecx \n\t" |
| 2599 | "jnz .loop8_pass4 \n\t" |
| 2600 | "EMMS \n\t" // DONE |
| 2601 | |
| 2602 | : "=c" (dummy_value_c), // output regs (dummy) |
| 2603 | "=S" (dummy_value_S), |
| 2604 | "=D" (dummy_value_D) |
| 2605 | |
| 2606 | : "1" (sptr), // esi // input regs |
| 2607 | "2" (dp), // edi |
| 2608 | "0" (width) // ecx |
| 2609 | |
| 2610 | #if 0 /* %mm0 not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 2611 | : "%mm0" // clobber list |
| 2612 | #endif |
| 2613 | ); |
| 2614 | } |
| 2615 | } |
| 2616 | |
| 2617 | } /* end of pixel_bytes == 8 */ |
| 2618 | |
| 2619 | //-------------------------------------------------------------- |
| 2620 | else if (pixel_bytes == 6) |
| 2621 | { |
| 2622 | for (i = width; i; i--) |
| 2623 | { |
| 2624 | png_byte v[8]; |
| 2625 | int j; |
| 2626 | png_memcpy(v, sptr, 6); |
| 2627 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 2628 | { |
| 2629 | png_memcpy(dp, v, 6); |
| 2630 | dp -= 6; |
| 2631 | } |
| 2632 | sptr -= 6; |
| 2633 | } |
| 2634 | } /* end of pixel_bytes == 6 */ |
| 2635 | |
| 2636 | //-------------------------------------------------------------- |
| 2637 | else |
| 2638 | { |
| 2639 | for (i = width; i; i--) |
| 2640 | { |
| 2641 | png_byte v[8]; |
| 2642 | int j; |
| 2643 | png_memcpy(v, sptr, pixel_bytes); |
| 2644 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 2645 | { |
| 2646 | png_memcpy(dp, v, pixel_bytes); |
| 2647 | dp -= pixel_bytes; |
| 2648 | } |
| 2649 | sptr-= pixel_bytes; |
| 2650 | } |
| 2651 | } |
| 2652 | } // end of _mmx_supported ======================================== |
| 2653 | |
| 2654 | else /* MMX not supported: use modified C code - takes advantage |
| 2655 | * of inlining of png_memcpy for a constant */ |
| 2656 | /* GRR 19991007: does it? or should pixel_bytes in each |
| 2657 | * block be replaced with immediate value (e.g., 1)? */ |
| 2658 | /* GRR 19991017: replaced with constants in each case */ |
| 2659 | #endif /* PNG_MMX_CODE_SUPPORTED */ |
| 2660 | { |
| 2661 | if (pixel_bytes == 1) |
| 2662 | { |
| 2663 | for (i = width; i; i--) |
| 2664 | { |
| 2665 | int j; |
| 2666 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 2667 | { |
| 2668 | *dp-- = *sptr; |
| 2669 | } |
| 2670 | --sptr; |
| 2671 | } |
| 2672 | } |
| 2673 | else if (pixel_bytes == 3) |
| 2674 | { |
| 2675 | for (i = width; i; i--) |
| 2676 | { |
| 2677 | png_byte v[8]; |
| 2678 | int j; |
| 2679 | png_memcpy(v, sptr, 3); |
| 2680 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 2681 | { |
| 2682 | png_memcpy(dp, v, 3); |
| 2683 | dp -= 3; |
| 2684 | } |
| 2685 | sptr -= 3; |
| 2686 | } |
| 2687 | } |
| 2688 | else if (pixel_bytes == 2) |
| 2689 | { |
| 2690 | for (i = width; i; i--) |
| 2691 | { |
| 2692 | png_byte v[8]; |
| 2693 | int j; |
| 2694 | png_memcpy(v, sptr, 2); |
| 2695 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 2696 | { |
| 2697 | png_memcpy(dp, v, 2); |
| 2698 | dp -= 2; |
| 2699 | } |
| 2700 | sptr -= 2; |
| 2701 | } |
| 2702 | } |
| 2703 | else if (pixel_bytes == 4) |
| 2704 | { |
| 2705 | for (i = width; i; i--) |
| 2706 | { |
| 2707 | png_byte v[8]; |
| 2708 | int j; |
| 2709 | png_memcpy(v, sptr, 4); |
| 2710 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 2711 | { |
| 2712 | #ifdef PNG_DEBUG |
| 2713 | if (dp < row || dp+3 > row+png_ptr->row_buf_size) |
| 2714 | { |
| 2715 | printf("dp out of bounds: row=%d, dp=%d, rp=%d\n", |
| 2716 | row, dp, row+png_ptr->row_buf_size); |
| 2717 | printf("row_buf=%d\n",png_ptr->row_buf_size); |
| 2718 | } |
| 2719 | #endif |
| 2720 | png_memcpy(dp, v, 4); |
| 2721 | dp -= 4; |
| 2722 | } |
| 2723 | sptr -= 4; |
| 2724 | } |
| 2725 | } |
| 2726 | else if (pixel_bytes == 6) |
| 2727 | { |
| 2728 | for (i = width; i; i--) |
| 2729 | { |
| 2730 | png_byte v[8]; |
| 2731 | int j; |
| 2732 | png_memcpy(v, sptr, 6); |
| 2733 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 2734 | { |
| 2735 | png_memcpy(dp, v, 6); |
| 2736 | dp -= 6; |
| 2737 | } |
| 2738 | sptr -= 6; |
| 2739 | } |
| 2740 | } |
| 2741 | else if (pixel_bytes == 8) |
| 2742 | { |
| 2743 | for (i = width; i; i--) |
| 2744 | { |
| 2745 | png_byte v[8]; |
| 2746 | int j; |
| 2747 | png_memcpy(v, sptr, 8); |
| 2748 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 2749 | { |
| 2750 | png_memcpy(dp, v, 8); |
| 2751 | dp -= 8; |
| 2752 | } |
| 2753 | sptr -= 8; |
| 2754 | } |
| 2755 | } |
| 2756 | else /* GRR: should never be reached */ |
| 2757 | { |
| 2758 | for (i = width; i; i--) |
| 2759 | { |
| 2760 | png_byte v[8]; |
| 2761 | int j; |
| 2762 | png_memcpy(v, sptr, pixel_bytes); |
| 2763 | for (j = 0; j < png_pass_inc[pass]; j++) |
| 2764 | { |
| 2765 | png_memcpy(dp, v, pixel_bytes); |
| 2766 | dp -= pixel_bytes; |
| 2767 | } |
| 2768 | sptr -= pixel_bytes; |
| 2769 | } |
| 2770 | } |
| 2771 | |
| 2772 | } /* end if (MMX not supported) */ |
| 2773 | break; |
| 2774 | } |
| 2775 | } /* end switch (row_info->pixel_depth) */ |
| 2776 | |
| 2777 | row_info->width = final_width; |
| 2778 | |
| 2779 | row_info->rowbytes = PNG_ROWBYTES(row_info->pixel_depth,final_width); |
| 2780 | } |
| 2781 | |
| 2782 | } /* end png_do_read_interlace() */ |
| 2783 | |
| 2784 | #endif /* PNG_HAVE_MMX_READ_INTERLACE */ |
| 2785 | #endif /* PNG_READ_INTERLACING_SUPPORTED */ |
| 2786 | |
| 2787 | |
| 2788 | |
| 2789 | #if defined(PNG_HAVE_MMX_READ_FILTER_ROW) |
| 2790 | #if defined(PNG_MMX_CODE_SUPPORTED) |
| 2791 | |
| 2792 | // These variables are utilized in the functions below. They are declared |
| 2793 | // globally here to ensure alignment on 8-byte boundaries. |
| 2794 | |
| 2795 | union uAll { |
| 2796 | long long use; |
| 2797 | double align; |
| 2798 | } _LBCarryMask = {0x0101010101010101LL}, |
| 2799 | _HBClearMask = {0x7f7f7f7f7f7f7f7fLL}, |
| 2800 | _ActiveMask, _ActiveMask2, _ActiveMaskEnd, _ShiftBpp, _ShiftRem; |
| 2801 | |
| 2802 | #ifdef PNG_THREAD_UNSAFE_OK |
| 2803 | //===========================================================================// |
| 2804 | // // |
| 2805 | // P N G _ R E A D _ F I L T E R _ R O W _ M M X _ A V G // |
| 2806 | // // |
| 2807 | //===========================================================================// |
| 2808 | |
| 2809 | // Optimized code for PNG Average filter decoder |
| 2810 | |
| 2811 | static void /* PRIVATE */ |
| 2812 | png_read_filter_row_mmx_avg(png_row_infop row_info, png_bytep row, |
| 2813 | png_bytep prev_row) |
| 2814 | { |
| 2815 | int bpp; |
| 2816 | int dummy_value_c; // fix 'forbidden register 2 (cx) was spilled' error |
| 2817 | int dummy_value_S; |
| 2818 | int dummy_value_D; |
| 2819 | |
| 2820 | bpp = (row_info->pixel_depth + 7) >> 3; // get # bytes per pixel |
| 2821 | _FullLength = row_info->rowbytes; // # of bytes to filter |
| 2822 | |
| 2823 | __asm__ __volatile__ ( |
| 2824 | // initialize address pointers and offset |
| 2825 | #ifdef __PIC__ |
| 2826 | "pushl %%ebx \n\t" // save index to Global Offset Table |
| 2827 | #endif |
| 2828 | //pre "movl row, %%edi \n\t" // edi: Avg(x) |
| 2829 | "xorl %%ebx, %%ebx \n\t" // ebx: x |
| 2830 | "movl %%edi, %%edx \n\t" |
| 2831 | //pre "movl prev_row, %%esi \n\t" // esi: Prior(x) |
| 2832 | //pre "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx) |
| 2833 | "subl %%ecx, %%edx \n\t" // edx: Raw(x-bpp) |
| 2834 | |
| 2835 | "xorl %%eax,%%eax \n\t" |
| 2836 | |
| 2837 | // Compute the Raw value for the first bpp bytes |
| 2838 | // Raw(x) = Avg(x) + (Prior(x)/2) |
| 2839 | "avg_rlp: \n\t" |
| 2840 | "movb (%%esi,%%ebx,),%%al \n\t" // load al with Prior(x) |
| 2841 | "incl %%ebx \n\t" |
| 2842 | "shrb %%al \n\t" // divide by 2 |
| 2843 | "addb -1(%%edi,%%ebx,),%%al \n\t" // add Avg(x); -1 to offset inc ebx |
| 2844 | //pre "cmpl bpp, %%ebx \n\t" // (bpp is preloaded into ecx) |
| 2845 | "cmpl %%ecx, %%ebx \n\t" |
| 2846 | "movb %%al,-1(%%edi,%%ebx,) \n\t" // write Raw(x); -1 to offset inc ebx |
| 2847 | "jb avg_rlp \n\t" // mov does not affect flags |
| 2848 | |
| 2849 | // get # of bytes to alignment |
| 2850 | "movl %%edi, _dif \n\t" // take start of row |
| 2851 | "addl %%ebx, _dif \n\t" // add bpp |
| 2852 | "addl $0xf, _dif \n\t" // add 7+8 to incr past alignment bdry |
| 2853 | "andl $0xfffffff8, _dif \n\t" // mask to alignment boundary |
| 2854 | "subl %%edi, _dif \n\t" // subtract from start => value ebx at |
| 2855 | "jz avg_go \n\t" // alignment |
| 2856 | |
| 2857 | // fix alignment |
| 2858 | // Compute the Raw value for the bytes up to the alignment boundary |
| 2859 | // Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2) |
| 2860 | "xorl %%ecx, %%ecx \n\t" |
| 2861 | |
| 2862 | "avg_lp1: \n\t" |
| 2863 | "xorl %%eax, %%eax \n\t" |
| 2864 | "movb (%%esi,%%ebx,), %%cl \n\t" // load cl with Prior(x) |
| 2865 | "movb (%%edx,%%ebx,), %%al \n\t" // load al with Raw(x-bpp) |
| 2866 | "addw %%cx, %%ax \n\t" |
| 2867 | "incl %%ebx \n\t" |
| 2868 | "shrw %%ax \n\t" // divide by 2 |
| 2869 | "addb -1(%%edi,%%ebx,), %%al \n\t" // add Avg(x); -1 to offset inc ebx |
| 2870 | "cmpl _dif, %%ebx \n\t" // check if at alignment boundary |
| 2871 | "movb %%al, -1(%%edi,%%ebx,) \n\t" // write Raw(x); -1 to offset inc ebx |
| 2872 | "jb avg_lp1 \n\t" // repeat until at alignment boundary |
| 2873 | |
| 2874 | "avg_go: \n\t" |
| 2875 | "movl _FullLength, %%eax \n\t" |
| 2876 | "movl %%eax, %%ecx \n\t" |
| 2877 | "subl %%ebx, %%eax \n\t" // subtract alignment fix |
| 2878 | "andl $0x00000007, %%eax \n\t" // calc bytes over mult of 8 |
| 2879 | "subl %%eax, %%ecx \n\t" // drop over bytes from original length |
| 2880 | "movl %%ecx, _MMXLength \n\t" |
| 2881 | #ifdef __PIC__ |
| 2882 | "popl %%ebx \n\t" // restore index to Global Offset Table |
| 2883 | #endif |
| 2884 | |
| 2885 | : "=c" (dummy_value_c), // output regs (dummy) |
| 2886 | "=S" (dummy_value_S), |
| 2887 | "=D" (dummy_value_D) |
| 2888 | |
| 2889 | : "0" (bpp), // ecx // input regs |
| 2890 | "1" (prev_row), // esi |
| 2891 | "2" (row) // edi |
| 2892 | |
| 2893 | : "%eax", "%edx" // clobber list |
| 2894 | #ifndef __PIC__ |
| 2895 | , "%ebx" |
| 2896 | #endif |
| 2897 | // GRR: INCLUDE "memory" as clobbered? (_dif, _MMXLength) |
| 2898 | // (seems to work fine without...) |
| 2899 | ); |
| 2900 | |
| 2901 | // now do the math for the rest of the row |
| 2902 | switch (bpp) |
| 2903 | { |
| 2904 | case 3: |
| 2905 | { |
| 2906 | _ActiveMask.use = 0x0000000000ffffffLL; |
| 2907 | _ShiftBpp.use = 24; // == 3 * 8 |
| 2908 | _ShiftRem.use = 40; // == 64 - 24 |
| 2909 | |
| 2910 | __asm__ __volatile__ ( |
| 2911 | // re-init address pointers and offset |
| 2912 | "movq _ActiveMask, %%mm7 \n\t" |
| 2913 | "movl _dif, %%ecx \n\t" // ecx: x = offset to |
| 2914 | "movq _LBCarryMask, %%mm5 \n\t" // alignment boundary |
| 2915 | // preload "movl row, %%edi \n\t" // edi: Avg(x) |
| 2916 | "movq _HBClearMask, %%mm4 \n\t" |
| 2917 | // preload "movl prev_row, %%esi \n\t" // esi: Prior(x) |
| 2918 | |
| 2919 | // prime the pump: load the first Raw(x-bpp) data set |
| 2920 | "movq -8(%%edi,%%ecx,), %%mm2 \n\t" // load previous aligned 8 bytes |
| 2921 | // (correct pos. in loop below) |
| 2922 | "avg_3lp: \n\t" |
| 2923 | "movq (%%edi,%%ecx,), %%mm0 \n\t" // load mm0 with Avg(x) |
| 2924 | "movq %%mm5, %%mm3 \n\t" |
| 2925 | "psrlq _ShiftRem, %%mm2 \n\t" // correct position Raw(x-bpp) |
| 2926 | // data |
| 2927 | "movq (%%esi,%%ecx,), %%mm1 \n\t" // load mm1 with Prior(x) |
| 2928 | "movq %%mm7, %%mm6 \n\t" |
| 2929 | "pand %%mm1, %%mm3 \n\t" // get lsb for each prev_row byte |
| 2930 | "psrlq $1, %%mm1 \n\t" // divide prev_row bytes by 2 |
| 2931 | "pand %%mm4, %%mm1 \n\t" // clear invalid bit 7 of each |
| 2932 | // byte |
| 2933 | "paddb %%mm1, %%mm0 \n\t" // add (Prev_row/2) to Avg for |
| 2934 | // each byte |
| 2935 | // add 1st active group (Raw(x-bpp)/2) to average with LBCarry |
| 2936 | "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting |
| 2937 | // LBCarrys |
| 2938 | "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte |
| 2939 | // where both |
| 2940 | // lsb's were == 1 (only valid for active group) |
| 2941 | "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2 |
| 2942 | "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each |
| 2943 | // byte |
| 2944 | "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2) |
| 2945 | // for each byte |
| 2946 | "pand %%mm6, %%mm2 \n\t" // leave only Active Group 1 |
| 2947 | // bytes to add to Avg |
| 2948 | "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to |
| 2949 | // Avg for each Active |
| 2950 | // byte |
| 2951 | // add 2nd active group (Raw(x-bpp)/2) to average with _LBCarry |
| 2952 | "psllq _ShiftBpp, %%mm6 \n\t" // shift the mm6 mask to cover |
| 2953 | // bytes 3-5 |
| 2954 | "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2 |
| 2955 | "psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly |
| 2956 | "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting |
| 2957 | // LBCarrys |
| 2958 | "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte |
| 2959 | // where both |
| 2960 | // lsb's were == 1 (only valid for active group) |
| 2961 | "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2 |
| 2962 | "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each |
| 2963 | // byte |
| 2964 | "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2) |
| 2965 | // for each byte |
| 2966 | "pand %%mm6, %%mm2 \n\t" // leave only Active Group 2 |
| 2967 | // bytes to add to Avg |
| 2968 | "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to |
| 2969 | // Avg for each Active |
| 2970 | // byte |
| 2971 | |
| 2972 | // add 3rd active group (Raw(x-bpp)/2) to average with _LBCarry |
| 2973 | "psllq _ShiftBpp, %%mm6 \n\t" // shift mm6 mask to cover last |
| 2974 | // two |
| 2975 | // bytes |
| 2976 | "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2 |
| 2977 | "psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly |
| 2978 | // Data only needs to be shifted once here to |
| 2979 | // get the correct x-bpp offset. |
| 2980 | "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting |
| 2981 | // LBCarrys |
| 2982 | "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte |
| 2983 | // where both |
| 2984 | // lsb's were == 1 (only valid for active group) |
| 2985 | "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2 |
| 2986 | "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each |
| 2987 | // byte |
| 2988 | "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2) |
| 2989 | // for each byte |
| 2990 | "pand %%mm6, %%mm2 \n\t" // leave only Active Group 2 |
| 2991 | // bytes to add to Avg |
| 2992 | "addl $8, %%ecx \n\t" |
| 2993 | "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to |
| 2994 | // Avg for each Active |
| 2995 | // byte |
| 2996 | // now ready to write back to memory |
| 2997 | "movq %%mm0, -8(%%edi,%%ecx,) \n\t" |
| 2998 | // move updated Raw(x) to use as Raw(x-bpp) for next loop |
| 2999 | "cmpl _MMXLength, %%ecx \n\t" |
| 3000 | "movq %%mm0, %%mm2 \n\t" // mov updated Raw(x) to mm2 |
| 3001 | "jb avg_3lp \n\t" |
| 3002 | |
| 3003 | : "=S" (dummy_value_S), // output regs (dummy) |
| 3004 | "=D" (dummy_value_D) |
| 3005 | |
| 3006 | : "0" (prev_row), // esi // input regs |
| 3007 | "1" (row) // edi |
| 3008 | |
| 3009 | : "%ecx" // clobber list |
| 3010 | #if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 3011 | , "%mm0", "%mm1", "%mm2", "%mm3" |
| 3012 | , "%mm4", "%mm5", "%mm6", "%mm7" |
| 3013 | #endif |
| 3014 | ); |
| 3015 | } |
| 3016 | break; // end 3 bpp |
| 3017 | |
| 3018 | case 6: |
| 3019 | case 4: |
| 3020 | //case 7: // who wrote this? PNG doesn't support 5 or 7 bytes/pixel |
| 3021 | //case 5: // GRR BOGUS |
| 3022 | { |
| 3023 | _ActiveMask.use = 0xffffffffffffffffLL; // use shift below to clear |
| 3024 | // appropriate inactive bytes |
| 3025 | _ShiftBpp.use = bpp << 3; |
| 3026 | _ShiftRem.use = 64 - _ShiftBpp.use; |
| 3027 | |
| 3028 | __asm__ __volatile__ ( |
| 3029 | "movq _HBClearMask, %%mm4 \n\t" |
| 3030 | |
| 3031 | // re-init address pointers and offset |
| 3032 | "movl _dif, %%ecx \n\t" // ecx: x = offset to |
| 3033 | // alignment boundary |
| 3034 | |
| 3035 | // load _ActiveMask and clear all bytes except for 1st active group |
| 3036 | "movq _ActiveMask, %%mm7 \n\t" |
| 3037 | // preload "movl row, %%edi \n\t" // edi: Avg(x) |
| 3038 | "psrlq _ShiftRem, %%mm7 \n\t" |
| 3039 | // preload "movl prev_row, %%esi \n\t" // esi: Prior(x) |
| 3040 | "movq %%mm7, %%mm6 \n\t" |
| 3041 | "movq _LBCarryMask, %%mm5 \n\t" |
| 3042 | "psllq _ShiftBpp, %%mm6 \n\t" // create mask for 2nd active |
| 3043 | // group |
| 3044 | |
| 3045 | // prime the pump: load the first Raw(x-bpp) data set |
| 3046 | "movq -8(%%edi,%%ecx,), %%mm2 \n\t" // load previous aligned 8 bytes |
| 3047 | // (we correct pos. in loop below) |
| 3048 | "avg_4lp: \n\t" |
| 3049 | "movq (%%edi,%%ecx,), %%mm0 \n\t" |
| 3050 | "psrlq _ShiftRem, %%mm2 \n\t" // shift data to pos. correctly |
| 3051 | "movq (%%esi,%%ecx,), %%mm1 \n\t" |
| 3052 | // add (Prev_row/2) to average |
| 3053 | "movq %%mm5, %%mm3 \n\t" |
| 3054 | "pand %%mm1, %%mm3 \n\t" // get lsb for each prev_row byte |
| 3055 | "psrlq $1, %%mm1 \n\t" // divide prev_row bytes by 2 |
| 3056 | "pand %%mm4, %%mm1 \n\t" // clear invalid bit 7 of each |
| 3057 | // byte |
| 3058 | "paddb %%mm1, %%mm0 \n\t" // add (Prev_row/2) to Avg for |
| 3059 | // each byte |
| 3060 | // add 1st active group (Raw(x-bpp)/2) to average with _LBCarry |
| 3061 | "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting |
| 3062 | // LBCarrys |
| 3063 | "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte |
| 3064 | // where both |
| 3065 | // lsb's were == 1 (only valid for active group) |
| 3066 | "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2 |
| 3067 | "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each |
| 3068 | // byte |
| 3069 | "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2) |
| 3070 | // for each byte |
| 3071 | "pand %%mm7, %%mm2 \n\t" // leave only Active Group 1 |
| 3072 | // bytes to add to Avg |
| 3073 | "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to Avg |
| 3074 | // for each Active |
| 3075 | // byte |
| 3076 | // add 2nd active group (Raw(x-bpp)/2) to average with _LBCarry |
| 3077 | "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2 |
| 3078 | "psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly |
| 3079 | "addl $8, %%ecx \n\t" |
| 3080 | "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting |
| 3081 | // LBCarrys |
| 3082 | "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte |
| 3083 | // where both |
| 3084 | // lsb's were == 1 (only valid for active group) |
| 3085 | "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2 |
| 3086 | "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each |
| 3087 | // byte |
| 3088 | "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2) |
| 3089 | // for each byte |
| 3090 | "pand %%mm6, %%mm2 \n\t" // leave only Active Group 2 |
| 3091 | // bytes to add to Avg |
| 3092 | "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to |
| 3093 | // Avg for each Active |
| 3094 | // byte |
| 3095 | "cmpl _MMXLength, %%ecx \n\t" |
| 3096 | // now ready to write back to memory |
| 3097 | "movq %%mm0, -8(%%edi,%%ecx,) \n\t" |
| 3098 | // prep Raw(x-bpp) for next loop |
| 3099 | "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2 |
| 3100 | "jb avg_4lp \n\t" |
| 3101 | |
| 3102 | : "=S" (dummy_value_S), // output regs (dummy) |
| 3103 | "=D" (dummy_value_D) |
| 3104 | |
| 3105 | : "0" (prev_row), // esi // input regs |
| 3106 | "1" (row) // edi |
| 3107 | |
| 3108 | : "%ecx" // clobber list |
| 3109 | #if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 3110 | , "%mm0", "%mm1", "%mm2", "%mm3" |
| 3111 | , "%mm4", "%mm5", "%mm6", "%mm7" |
| 3112 | #endif |
| 3113 | ); |
| 3114 | } |
| 3115 | break; // end 4,6 bpp |
| 3116 | |
| 3117 | case 2: |
| 3118 | { |
| 3119 | _ActiveMask.use = 0x000000000000ffffLL; |
| 3120 | _ShiftBpp.use = 16; // == 2 * 8 |
| 3121 | _ShiftRem.use = 48; // == 64 - 16 |
| 3122 | |
| 3123 | __asm__ __volatile__ ( |
| 3124 | // load _ActiveMask |
| 3125 | "movq _ActiveMask, %%mm7 \n\t" |
| 3126 | // re-init address pointers and offset |
| 3127 | "movl _dif, %%ecx \n\t" // ecx: x = offset to alignment |
| 3128 | // boundary |
| 3129 | "movq _LBCarryMask, %%mm5 \n\t" |
| 3130 | // preload "movl row, %%edi \n\t" // edi: Avg(x) |
| 3131 | "movq _HBClearMask, %%mm4 \n\t" |
| 3132 | // preload "movl prev_row, %%esi \n\t" // esi: Prior(x) |
| 3133 | |
| 3134 | // prime the pump: load the first Raw(x-bpp) data set |
| 3135 | "movq -8(%%edi,%%ecx,), %%mm2 \n\t" // load previous aligned 8 bytes |
| 3136 | // (we correct pos. in loop below) |
| 3137 | "avg_2lp: \n\t" |
| 3138 | "movq (%%edi,%%ecx,), %%mm0 \n\t" |
| 3139 | "psrlq _ShiftRem, %%mm2 \n\t" // shift data to pos. correctly |
| 3140 | "movq (%%esi,%%ecx,), %%mm1 \n\t" // (GRR BUGFIX: was psllq) |
| 3141 | // add (Prev_row/2) to average |
| 3142 | "movq %%mm5, %%mm3 \n\t" |
| 3143 | "pand %%mm1, %%mm3 \n\t" // get lsb for each prev_row byte |
| 3144 | "psrlq $1, %%mm1 \n\t" // divide prev_row bytes by 2 |
| 3145 | "pand %%mm4, %%mm1 \n\t" // clear invalid bit 7 of each |
| 3146 | // byte |
| 3147 | "movq %%mm7, %%mm6 \n\t" |
| 3148 | "paddb %%mm1, %%mm0 \n\t" // add (Prev_row/2) to Avg for |
| 3149 | // each byte |
| 3150 | |
| 3151 | // add 1st active group (Raw(x-bpp)/2) to average with _LBCarry |
| 3152 | "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting |
| 3153 | // LBCarrys |
| 3154 | "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte |
| 3155 | // where both |
| 3156 | // lsb's were == 1 (only valid |
| 3157 | // for active group) |
| 3158 | "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2 |
| 3159 | "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each |
| 3160 | // byte |
| 3161 | "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2) |
| 3162 | // for each byte |
| 3163 | "pand %%mm6, %%mm2 \n\t" // leave only Active Group 1 |
| 3164 | // bytes to add to Avg |
| 3165 | "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to Avg |
| 3166 | // for each Active byte |
| 3167 | |
| 3168 | // add 2nd active group (Raw(x-bpp)/2) to average with _LBCarry |
| 3169 | "psllq _ShiftBpp, %%mm6 \n\t" // shift the mm6 mask to cover |
| 3170 | // bytes 2 & 3 |
| 3171 | "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2 |
| 3172 | "psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly |
| 3173 | "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting |
| 3174 | // LBCarrys |
| 3175 | "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte |
| 3176 | // where both |
| 3177 | // lsb's were == 1 (only valid |
| 3178 | // for active group) |
| 3179 | "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2 |
| 3180 | "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each |
| 3181 | // byte |
| 3182 | "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2) |
| 3183 | // for each byte |
| 3184 | "pand %%mm6, %%mm2 \n\t" // leave only Active Group 2 |
| 3185 | // bytes to add to Avg |
| 3186 | "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to |
| 3187 | // Avg for each Active byte |
| 3188 | |
| 3189 | // add 3rd active group (Raw(x-bpp)/2) to average with _LBCarry |
| 3190 | "psllq _ShiftBpp, %%mm6 \n\t" // shift the mm6 mask to cover |
| 3191 | // bytes 4 & 5 |
| 3192 | "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2 |
| 3193 | "psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly |
| 3194 | "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting |
| 3195 | // LBCarrys |
| 3196 | "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte |
| 3197 | // where both lsb's were == 1 |
| 3198 | // (only valid for active group) |
| 3199 | "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2 |
| 3200 | "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each |
| 3201 | // byte |
| 3202 | "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2) |
| 3203 | // for each byte |
| 3204 | "pand %%mm6, %%mm2 \n\t" // leave only Active Group 2 |
| 3205 | // bytes to add to Avg |
| 3206 | "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to |
| 3207 | // Avg for each Active byte |
| 3208 | |
| 3209 | // add 4th active group (Raw(x-bpp)/2) to average with _LBCarry |
| 3210 | "psllq _ShiftBpp, %%mm6 \n\t" // shift the mm6 mask to cover |
| 3211 | // bytes 6 & 7 |
| 3212 | "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2 |
| 3213 | "psllq _ShiftBpp, %%mm2 \n\t" // shift data to pos. correctly |
| 3214 | "addl $8, %%ecx \n\t" |
| 3215 | "movq %%mm3, %%mm1 \n\t" // now use mm1 for getting |
| 3216 | // LBCarrys |
| 3217 | "pand %%mm2, %%mm1 \n\t" // get LBCarrys for each byte |
| 3218 | // where both |
| 3219 | // lsb's were == 1 (only valid |
| 3220 | // for active group) |
| 3221 | "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2 |
| 3222 | "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each |
| 3223 | // byte |
| 3224 | "paddb %%mm1, %%mm2 \n\t" // add LBCarrys to (Raw(x-bpp)/2) |
| 3225 | // for each byte |
| 3226 | "pand %%mm6, %%mm2 \n\t" // leave only Active Group 2 |
| 3227 | // bytes to add to Avg |
| 3228 | "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) + LBCarrys to |
| 3229 | // Avg for each Active byte |
| 3230 | |
| 3231 | "cmpl _MMXLength, %%ecx \n\t" |
| 3232 | // now ready to write back to memory |
| 3233 | "movq %%mm0, -8(%%edi,%%ecx,) \n\t" |
| 3234 | // prep Raw(x-bpp) for next loop |
| 3235 | "movq %%mm0, %%mm2 \n\t" // mov updated Raws to mm2 |
| 3236 | "jb avg_2lp \n\t" |
| 3237 | |
| 3238 | : "=S" (dummy_value_S), // output regs (dummy) |
| 3239 | "=D" (dummy_value_D) |
| 3240 | |
| 3241 | : "0" (prev_row), // esi // input regs |
| 3242 | "1" (row) // edi |
| 3243 | |
| 3244 | : "%ecx" // clobber list |
| 3245 | #if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 3246 | , "%mm0", "%mm1", "%mm2", "%mm3" |
| 3247 | , "%mm4", "%mm5", "%mm6", "%mm7" |
| 3248 | #endif |
| 3249 | ); |
| 3250 | } |
| 3251 | break; // end 2 bpp |
| 3252 | |
| 3253 | case 1: |
| 3254 | { |
| 3255 | __asm__ __volatile__ ( |
| 3256 | // re-init address pointers and offset |
| 3257 | #ifdef __PIC__ |
| 3258 | "pushl %%ebx \n\t" // save Global Offset Table index |
| 3259 | #endif |
| 3260 | "movl _dif, %%ebx \n\t" // ebx: x = offset to alignment |
| 3261 | // boundary |
| 3262 | // preload "movl row, %%edi \n\t" // edi: Avg(x) |
| 3263 | "cmpl _FullLength, %%ebx \n\t" // test if offset at end of array |
| 3264 | "jnb avg_1end \n\t" |
| 3265 | // do Paeth decode for remaining bytes |
| 3266 | // preload "movl prev_row, %%esi \n\t" // esi: Prior(x) |
| 3267 | "movl %%edi, %%edx \n\t" |
| 3268 | // preload "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx) |
| 3269 | "subl %%ecx, %%edx \n\t" // edx: Raw(x-bpp) |
| 3270 | "xorl %%ecx, %%ecx \n\t" // zero ecx before using cl & cx |
| 3271 | // in loop below |
| 3272 | "avg_1lp: \n\t" |
| 3273 | // Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2) |
| 3274 | "xorl %%eax, %%eax \n\t" |
| 3275 | "movb (%%esi,%%ebx,), %%cl \n\t" // load cl with Prior(x) |
| 3276 | "movb (%%edx,%%ebx,), %%al \n\t" // load al with Raw(x-bpp) |
| 3277 | "addw %%cx, %%ax \n\t" |
| 3278 | "incl %%ebx \n\t" |
| 3279 | "shrw %%ax \n\t" // divide by 2 |
| 3280 | "addb -1(%%edi,%%ebx,), %%al \n\t" // add Avg(x); -1 to offset |
| 3281 | // inc ebx |
| 3282 | "cmpl _FullLength, %%ebx \n\t" // check if at end of array |
| 3283 | "movb %%al, -1(%%edi,%%ebx,) \n\t" // write back Raw(x); |
| 3284 | // mov does not affect flags; -1 to offset inc ebx |
| 3285 | "jb avg_1lp \n\t" |
| 3286 | |
| 3287 | "avg_1end: \n\t" |
| 3288 | #ifdef __PIC__ |
| 3289 | "popl %%ebx \n\t" // Global Offset Table index |
| 3290 | #endif |
| 3291 | |
| 3292 | : "=c" (dummy_value_c), // output regs (dummy) |
| 3293 | "=S" (dummy_value_S), |
| 3294 | "=D" (dummy_value_D) |
| 3295 | |
| 3296 | : "0" (bpp), // ecx // input regs |
| 3297 | "1" (prev_row), // esi |
| 3298 | "2" (row) // edi |
| 3299 | |
| 3300 | : "%eax", "%edx" // clobber list |
| 3301 | #ifndef __PIC__ |
| 3302 | , "%ebx" |
| 3303 | #endif |
| 3304 | ); |
| 3305 | } |
| 3306 | return; // end 1 bpp |
| 3307 | |
| 3308 | case 8: |
| 3309 | { |
| 3310 | __asm__ __volatile__ ( |
| 3311 | // re-init address pointers and offset |
| 3312 | "movl _dif, %%ecx \n\t" // ecx: x == offset to alignment |
| 3313 | "movq _LBCarryMask, %%mm5 \n\t" // boundary |
| 3314 | // preload "movl row, %%edi \n\t" // edi: Avg(x) |
| 3315 | "movq _HBClearMask, %%mm4 \n\t" |
| 3316 | // preload "movl prev_row, %%esi \n\t" // esi: Prior(x) |
| 3317 | |
| 3318 | // prime the pump: load the first Raw(x-bpp) data set |
| 3319 | "movq -8(%%edi,%%ecx,), %%mm2 \n\t" // load previous aligned 8 bytes |
| 3320 | // (NO NEED to correct pos. in loop below) |
| 3321 | |
| 3322 | "avg_8lp: \n\t" |
| 3323 | "movq (%%edi,%%ecx,), %%mm0 \n\t" |
| 3324 | "movq %%mm5, %%mm3 \n\t" |
| 3325 | "movq (%%esi,%%ecx,), %%mm1 \n\t" |
| 3326 | "addl $8, %%ecx \n\t" |
| 3327 | "pand %%mm1, %%mm3 \n\t" // get lsb for each prev_row byte |
| 3328 | "psrlq $1, %%mm1 \n\t" // divide prev_row bytes by 2 |
| 3329 | "pand %%mm2, %%mm3 \n\t" // get LBCarrys for each byte |
| 3330 | // where both lsb's were == 1 |
| 3331 | "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2 |
| 3332 | "pand %%mm4, %%mm1 \n\t" // clear invalid bit 7, each byte |
| 3333 | "paddb %%mm3, %%mm0 \n\t" // add LBCarrys to Avg, each byte |
| 3334 | "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7, each byte |
| 3335 | "paddb %%mm1, %%mm0 \n\t" // add (Prev_row/2) to Avg, each |
| 3336 | "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) to Avg for each |
| 3337 | "cmpl _MMXLength, %%ecx \n\t" |
| 3338 | "movq %%mm0, -8(%%edi,%%ecx,) \n\t" |
| 3339 | "movq %%mm0, %%mm2 \n\t" // reuse as Raw(x-bpp) |
| 3340 | "jb avg_8lp \n\t" |
| 3341 | |
| 3342 | : "=S" (dummy_value_S), // output regs (dummy) |
| 3343 | "=D" (dummy_value_D) |
| 3344 | |
| 3345 | : "0" (prev_row), // esi // input regs |
| 3346 | "1" (row) // edi |
| 3347 | |
| 3348 | : "%ecx" // clobber list |
| 3349 | #if 0 /* %mm0, ..., %mm5 not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 3350 | , "%mm0", "%mm1", "%mm2" |
| 3351 | , "%mm3", "%mm4", "%mm5" |
| 3352 | #endif |
| 3353 | ); |
| 3354 | } |
| 3355 | break; // end 8 bpp |
| 3356 | |
| 3357 | default: // bpp greater than 8 (!= 1,2,3,4,[5],6,[7],8) |
| 3358 | { |
| 3359 | |
| 3360 | #ifdef PNG_DEBUG |
| 3361 | // GRR: PRINT ERROR HERE: SHOULD NEVER BE REACHED |
| 3362 | png_debug(1, |
| 3363 | "Internal logic error in pnggccrd (png_read_filter_row_mmx_avg())\n"); |
| 3364 | #endif |
| 3365 | |
| 3366 | #if 0 |
| 3367 | __asm__ __volatile__ ( |
| 3368 | "movq _LBCarryMask, %%mm5 \n\t" |
| 3369 | // re-init address pointers and offset |
| 3370 | "movl _dif, %%ebx \n\t" // ebx: x = offset to |
| 3371 | // alignment boundary |
| 3372 | "movl row, %%edi \n\t" // edi: Avg(x) |
| 3373 | "movq _HBClearMask, %%mm4 \n\t" |
| 3374 | "movl %%edi, %%edx \n\t" |
| 3375 | "movl prev_row, %%esi \n\t" // esi: Prior(x) |
| 3376 | "subl bpp, %%edx \n\t" // edx: Raw(x-bpp) |
| 3377 | "avg_Alp: \n\t" |
| 3378 | "movq (%%edi,%%ebx,), %%mm0 \n\t" |
| 3379 | "movq %%mm5, %%mm3 \n\t" |
| 3380 | "movq (%%esi,%%ebx,), %%mm1 \n\t" |
| 3381 | "pand %%mm1, %%mm3 \n\t" // get lsb for each prev_row byte |
| 3382 | "movq (%%edx,%%ebx,), %%mm2 \n\t" |
| 3383 | "psrlq $1, %%mm1 \n\t" // divide prev_row bytes by 2 |
| 3384 | "pand %%mm2, %%mm3 \n\t" // get LBCarrys for each byte |
| 3385 | // where both lsb's were == 1 |
| 3386 | "psrlq $1, %%mm2 \n\t" // divide raw bytes by 2 |
| 3387 | "pand %%mm4, %%mm1 \n\t" // clear invalid bit 7 of each |
| 3388 | // byte |
| 3389 | "paddb %%mm3, %%mm0 \n\t" // add LBCarrys to Avg for each |
| 3390 | // byte |
| 3391 | "pand %%mm4, %%mm2 \n\t" // clear invalid bit 7 of each |
| 3392 | // byte |
| 3393 | "paddb %%mm1, %%mm0 \n\t" // add (Prev_row/2) to Avg for |
| 3394 | // each byte |
| 3395 | "addl $8, %%ebx \n\t" |
| 3396 | "paddb %%mm2, %%mm0 \n\t" // add (Raw/2) to Avg for each |
| 3397 | // byte |
| 3398 | "cmpl _MMXLength, %%ebx \n\t" |
| 3399 | "movq %%mm0, -8(%%edi,%%ebx,) \n\t" |
| 3400 | "jb avg_Alp \n\t" |
| 3401 | |
| 3402 | : // FIXASM: output regs/vars go here, e.g.: "=m" (memory_var) |
| 3403 | |
| 3404 | : // FIXASM: input regs, e.g.: "c" (count), "S" (src), "D" (dest) |
| 3405 | |
| 3406 | : "%ebx", "%edx", "%edi", "%esi" // CHECKASM: clobber list |
| 3407 | ); |
| 3408 | #endif /* 0 - NEVER REACHED */ |
| 3409 | } |
| 3410 | break; |
| 3411 | |
| 3412 | } // end switch (bpp) |
| 3413 | |
| 3414 | __asm__ __volatile__ ( |
| 3415 | // MMX acceleration complete; now do clean-up |
| 3416 | // check if any remaining bytes left to decode |
| 3417 | #ifdef __PIC__ |
| 3418 | "pushl %%ebx \n\t" // save index to Global Offset Table |
| 3419 | #endif |
| 3420 | "movl _MMXLength, %%ebx \n\t" // ebx: x == offset bytes after MMX |
| 3421 | //pre "movl row, %%edi \n\t" // edi: Avg(x) |
| 3422 | "cmpl _FullLength, %%ebx \n\t" // test if offset at end of array |
| 3423 | "jnb avg_end \n\t" |
| 3424 | |
| 3425 | // do Avg decode for remaining bytes |
| 3426 | //pre "movl prev_row, %%esi \n\t" // esi: Prior(x) |
| 3427 | "movl %%edi, %%edx \n\t" |
| 3428 | //pre "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx) |
| 3429 | "subl %%ecx, %%edx \n\t" // edx: Raw(x-bpp) |
| 3430 | "xorl %%ecx, %%ecx \n\t" // zero ecx before using cl & cx below |
| 3431 | |
| 3432 | "avg_lp2: \n\t" |
| 3433 | // Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2) |
| 3434 | "xorl %%eax, %%eax \n\t" |
| 3435 | "movb (%%esi,%%ebx,), %%cl \n\t" // load cl with Prior(x) |
| 3436 | "movb (%%edx,%%ebx,), %%al \n\t" // load al with Raw(x-bpp) |
| 3437 | "addw %%cx, %%ax \n\t" |
| 3438 | "incl %%ebx \n\t" |
| 3439 | "shrw %%ax \n\t" // divide by 2 |
| 3440 | "addb -1(%%edi,%%ebx,), %%al \n\t" // add Avg(x); -1 to offset inc ebx |
| 3441 | "cmpl _FullLength, %%ebx \n\t" // check if at end of array |
| 3442 | "movb %%al, -1(%%edi,%%ebx,) \n\t" // write back Raw(x) [mov does not |
| 3443 | "jb avg_lp2 \n\t" // affect flags; -1 to offset inc ebx] |
| 3444 | |
| 3445 | "avg_end: \n\t" |
| 3446 | "EMMS \n\t" // end MMX; prep for poss. FP instrs. |
| 3447 | #ifdef __PIC__ |
| 3448 | "popl %%ebx \n\t" // restore index to Global Offset Table |
| 3449 | #endif |
| 3450 | |
| 3451 | : "=c" (dummy_value_c), // output regs (dummy) |
| 3452 | "=S" (dummy_value_S), |
| 3453 | "=D" (dummy_value_D) |
| 3454 | |
| 3455 | : "0" (bpp), // ecx // input regs |
| 3456 | "1" (prev_row), // esi |
| 3457 | "2" (row) // edi |
| 3458 | |
| 3459 | : "%eax", "%edx" // clobber list |
| 3460 | #ifndef __PIC__ |
| 3461 | , "%ebx" |
| 3462 | #endif |
| 3463 | ); |
| 3464 | |
| 3465 | } /* end png_read_filter_row_mmx_avg() */ |
| 3466 | #endif |
| 3467 | |
| 3468 | |
| 3469 | |
| 3470 | #ifdef PNG_THREAD_UNSAFE_OK |
| 3471 | //===========================================================================// |
| 3472 | // // |
| 3473 | // P N G _ R E A D _ F I L T E R _ R O W _ M M X _ P A E T H // |
| 3474 | // // |
| 3475 | //===========================================================================// |
| 3476 | |
| 3477 | // Optimized code for PNG Paeth filter decoder |
| 3478 | |
| 3479 | static void /* PRIVATE */ |
| 3480 | png_read_filter_row_mmx_paeth(png_row_infop row_info, png_bytep row, |
| 3481 | png_bytep prev_row) |
| 3482 | { |
| 3483 | int bpp; |
| 3484 | int dummy_value_c; // fix 'forbidden register 2 (cx) was spilled' error |
| 3485 | int dummy_value_S; |
| 3486 | int dummy_value_D; |
| 3487 | |
| 3488 | bpp = (row_info->pixel_depth + 7) >> 3; // Get # bytes per pixel |
| 3489 | _FullLength = row_info->rowbytes; // # of bytes to filter |
| 3490 | |
| 3491 | __asm__ __volatile__ ( |
| 3492 | #ifdef __PIC__ |
| 3493 | "pushl %%ebx \n\t" // save index to Global Offset Table |
| 3494 | #endif |
| 3495 | "xorl %%ebx, %%ebx \n\t" // ebx: x offset |
| 3496 | //pre "movl row, %%edi \n\t" |
| 3497 | "xorl %%edx, %%edx \n\t" // edx: x-bpp offset |
| 3498 | //pre "movl prev_row, %%esi \n\t" |
| 3499 | "xorl %%eax, %%eax \n\t" |
| 3500 | |
| 3501 | // Compute the Raw value for the first bpp bytes |
| 3502 | // Note: the formula works out to be always |
| 3503 | // Paeth(x) = Raw(x) + Prior(x) where x < bpp |
| 3504 | "paeth_rlp: \n\t" |
| 3505 | "movb (%%edi,%%ebx,), %%al \n\t" |
| 3506 | "addb (%%esi,%%ebx,), %%al \n\t" |
| 3507 | "incl %%ebx \n\t" |
| 3508 | //pre "cmpl bpp, %%ebx \n\t" (bpp is preloaded into ecx) |
| 3509 | "cmpl %%ecx, %%ebx \n\t" |
| 3510 | "movb %%al, -1(%%edi,%%ebx,) \n\t" |
| 3511 | "jb paeth_rlp \n\t" |
| 3512 | // get # of bytes to alignment |
| 3513 | "movl %%edi, _dif \n\t" // take start of row |
| 3514 | "addl %%ebx, _dif \n\t" // add bpp |
| 3515 | "xorl %%ecx, %%ecx \n\t" |
| 3516 | "addl $0xf, _dif \n\t" // add 7 + 8 to incr past alignment |
| 3517 | // boundary |
| 3518 | "andl $0xfffffff8, _dif \n\t" // mask to alignment boundary |
| 3519 | "subl %%edi, _dif \n\t" // subtract from start ==> value ebx |
| 3520 | // at alignment |
| 3521 | "jz paeth_go \n\t" |
| 3522 | // fix alignment |
| 3523 | |
| 3524 | "paeth_lp1: \n\t" |
| 3525 | "xorl %%eax, %%eax \n\t" |
| 3526 | // pav = p - a = (a + b - c) - a = b - c |
| 3527 | "movb (%%esi,%%ebx,), %%al \n\t" // load Prior(x) into al |
| 3528 | "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl |
| 3529 | "subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp) |
| 3530 | "movl %%eax, _patemp \n\t" // Save pav for later use |
| 3531 | "xorl %%eax, %%eax \n\t" |
| 3532 | // pbv = p - b = (a + b - c) - b = a - c |
| 3533 | "movb (%%edi,%%edx,), %%al \n\t" // load Raw(x-bpp) into al |
| 3534 | "subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp) |
| 3535 | "movl %%eax, %%ecx \n\t" |
| 3536 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv |
| 3537 | "addl _patemp, %%eax \n\t" // pcv = pav + pbv |
| 3538 | // pc = abs(pcv) |
| 3539 | "testl $0x80000000, %%eax \n\t" |
| 3540 | "jz paeth_pca \n\t" |
| 3541 | "negl %%eax \n\t" // reverse sign of neg values |
| 3542 | |
| 3543 | "paeth_pca: \n\t" |
| 3544 | "movl %%eax, _pctemp \n\t" // save pc for later use |
| 3545 | // pb = abs(pbv) |
| 3546 | "testl $0x80000000, %%ecx \n\t" |
| 3547 | "jz paeth_pba \n\t" |
| 3548 | "negl %%ecx \n\t" // reverse sign of neg values |
| 3549 | |
| 3550 | "paeth_pba: \n\t" |
| 3551 | "movl %%ecx, _pbtemp \n\t" // save pb for later use |
| 3552 | // pa = abs(pav) |
| 3553 | "movl _patemp, %%eax \n\t" |
| 3554 | "testl $0x80000000, %%eax \n\t" |
| 3555 | "jz paeth_paa \n\t" |
| 3556 | "negl %%eax \n\t" // reverse sign of neg values |
| 3557 | |
| 3558 | "paeth_paa: \n\t" |
| 3559 | "movl %%eax, _patemp \n\t" // save pa for later use |
| 3560 | // test if pa <= pb |
| 3561 | "cmpl %%ecx, %%eax \n\t" |
| 3562 | "jna paeth_abb \n\t" |
| 3563 | // pa > pb; now test if pb <= pc |
| 3564 | "cmpl _pctemp, %%ecx \n\t" |
| 3565 | "jna paeth_bbc \n\t" |
| 3566 | // pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp) |
| 3567 | "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl |
| 3568 | "jmp paeth_paeth \n\t" |
| 3569 | |
| 3570 | "paeth_bbc: \n\t" |
| 3571 | // pb <= pc; Raw(x) = Paeth(x) + Prior(x) |
| 3572 | "movb (%%esi,%%ebx,), %%cl \n\t" // load Prior(x) into cl |
| 3573 | "jmp paeth_paeth \n\t" |
| 3574 | |
| 3575 | "paeth_abb: \n\t" |
| 3576 | // pa <= pb; now test if pa <= pc |
| 3577 | "cmpl _pctemp, %%eax \n\t" |
| 3578 | "jna paeth_abc \n\t" |
| 3579 | // pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp) |
| 3580 | "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl |
| 3581 | "jmp paeth_paeth \n\t" |
| 3582 | |
| 3583 | "paeth_abc: \n\t" |
| 3584 | // pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp) |
| 3585 | "movb (%%edi,%%edx,), %%cl \n\t" // load Raw(x-bpp) into cl |
| 3586 | |
| 3587 | "paeth_paeth: \n\t" |
| 3588 | "incl %%ebx \n\t" |
| 3589 | "incl %%edx \n\t" |
| 3590 | // Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256 |
| 3591 | "addb %%cl, -1(%%edi,%%ebx,) \n\t" |
| 3592 | "cmpl _dif, %%ebx \n\t" |
| 3593 | "jb paeth_lp1 \n\t" |
| 3594 | |
| 3595 | "paeth_go: \n\t" |
| 3596 | "movl _FullLength, %%ecx \n\t" |
| 3597 | "movl %%ecx, %%eax \n\t" |
| 3598 | "subl %%ebx, %%eax \n\t" // subtract alignment fix |
| 3599 | "andl $0x00000007, %%eax \n\t" // calc bytes over mult of 8 |
| 3600 | "subl %%eax, %%ecx \n\t" // drop over bytes from original length |
| 3601 | "movl %%ecx, _MMXLength \n\t" |
| 3602 | #ifdef __PIC__ |
| 3603 | "popl %%ebx \n\t" // restore index to Global Offset Table |
| 3604 | #endif |
| 3605 | |
| 3606 | : "=c" (dummy_value_c), // output regs (dummy) |
| 3607 | "=S" (dummy_value_S), |
| 3608 | "=D" (dummy_value_D) |
| 3609 | |
| 3610 | : "0" (bpp), // ecx // input regs |
| 3611 | "1" (prev_row), // esi |
| 3612 | "2" (row) // edi |
| 3613 | |
| 3614 | : "%eax", "%edx" // clobber list |
| 3615 | #ifndef __PIC__ |
| 3616 | , "%ebx" |
| 3617 | #endif |
| 3618 | ); |
| 3619 | |
| 3620 | // now do the math for the rest of the row |
| 3621 | switch (bpp) |
| 3622 | { |
| 3623 | case 3: |
| 3624 | { |
| 3625 | _ActiveMask.use = 0x0000000000ffffffLL; |
| 3626 | _ActiveMaskEnd.use = 0xffff000000000000LL; |
| 3627 | _ShiftBpp.use = 24; // == bpp(3) * 8 |
| 3628 | _ShiftRem.use = 40; // == 64 - 24 |
| 3629 | |
| 3630 | __asm__ __volatile__ ( |
| 3631 | "movl _dif, %%ecx \n\t" |
| 3632 | // preload "movl row, %%edi \n\t" |
| 3633 | // preload "movl prev_row, %%esi \n\t" |
| 3634 | "pxor %%mm0, %%mm0 \n\t" |
| 3635 | // prime the pump: load the first Raw(x-bpp) data set |
| 3636 | "movq -8(%%edi,%%ecx,), %%mm1 \n\t" |
| 3637 | "paeth_3lp: \n\t" |
| 3638 | "psrlq _ShiftRem, %%mm1 \n\t" // shift last 3 bytes to 1st |
| 3639 | // 3 bytes |
| 3640 | "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x) |
| 3641 | "punpcklbw %%mm0, %%mm1 \n\t" // unpack High bytes of a |
| 3642 | "movq -8(%%esi,%%ecx,), %%mm3 \n\t" // prep c=Prior(x-bpp) bytes |
| 3643 | "punpcklbw %%mm0, %%mm2 \n\t" // unpack High bytes of b |
| 3644 | "psrlq _ShiftRem, %%mm3 \n\t" // shift last 3 bytes to 1st |
| 3645 | // 3 bytes |
| 3646 | // pav = p - a = (a + b - c) - a = b - c |
| 3647 | "movq %%mm2, %%mm4 \n\t" |
| 3648 | "punpcklbw %%mm0, %%mm3 \n\t" // unpack High bytes of c |
| 3649 | // pbv = p - b = (a + b - c) - b = a - c |
| 3650 | "movq %%mm1, %%mm5 \n\t" |
| 3651 | "psubw %%mm3, %%mm4 \n\t" |
| 3652 | "pxor %%mm7, %%mm7 \n\t" |
| 3653 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv |
| 3654 | "movq %%mm4, %%mm6 \n\t" |
| 3655 | "psubw %%mm3, %%mm5 \n\t" |
| 3656 | |
| 3657 | // pa = abs(p-a) = abs(pav) |
| 3658 | // pb = abs(p-b) = abs(pbv) |
| 3659 | // pc = abs(p-c) = abs(pcv) |
| 3660 | "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0 |
| 3661 | "paddw %%mm5, %%mm6 \n\t" |
| 3662 | "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7 |
| 3663 | "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0 |
| 3664 | "psubw %%mm0, %%mm4 \n\t" |
| 3665 | "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0 |
| 3666 | "psubw %%mm0, %%mm4 \n\t" |
| 3667 | "psubw %%mm7, %%mm5 \n\t" |
| 3668 | "pxor %%mm0, %%mm0 \n\t" |
| 3669 | "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0 |
| 3670 | "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7 |
| 3671 | "psubw %%mm7, %%mm5 \n\t" |
| 3672 | "psubw %%mm0, %%mm6 \n\t" |
| 3673 | // test pa <= pb |
| 3674 | "movq %%mm4, %%mm7 \n\t" |
| 3675 | "psubw %%mm0, %%mm6 \n\t" |
| 3676 | "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb? |
| 3677 | "movq %%mm7, %%mm0 \n\t" |
| 3678 | // use mm7 mask to merge pa & pb |
| 3679 | "pand %%mm7, %%mm5 \n\t" |
| 3680 | // use mm0 mask copy to merge a & b |
| 3681 | "pand %%mm0, %%mm2 \n\t" |
| 3682 | "pandn %%mm4, %%mm7 \n\t" |
| 3683 | "pandn %%mm1, %%mm0 \n\t" |
| 3684 | "paddw %%mm5, %%mm7 \n\t" |
| 3685 | "paddw %%mm2, %%mm0 \n\t" |
| 3686 | // test ((pa <= pb)? pa:pb) <= pc |
| 3687 | "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc? |
| 3688 | "pxor %%mm1, %%mm1 \n\t" |
| 3689 | "pand %%mm7, %%mm3 \n\t" |
| 3690 | "pandn %%mm0, %%mm7 \n\t" |
| 3691 | "paddw %%mm3, %%mm7 \n\t" |
| 3692 | "pxor %%mm0, %%mm0 \n\t" |
| 3693 | "packuswb %%mm1, %%mm7 \n\t" |
| 3694 | "movq (%%esi,%%ecx,), %%mm3 \n\t" // load c=Prior(x-bpp) |
| 3695 | "pand _ActiveMask, %%mm7 \n\t" |
| 3696 | "movq %%mm3, %%mm2 \n\t" // load b=Prior(x) step 1 |
| 3697 | "paddb (%%edi,%%ecx,), %%mm7 \n\t" // add Paeth predictor with Raw(x) |
| 3698 | "punpcklbw %%mm0, %%mm3 \n\t" // unpack High bytes of c |
| 3699 | "movq %%mm7, (%%edi,%%ecx,) \n\t" // write back updated value |
| 3700 | "movq %%mm7, %%mm1 \n\t" // now mm1 will be used as |
| 3701 | // Raw(x-bpp) |
| 3702 | // now do Paeth for 2nd set of bytes (3-5) |
| 3703 | "psrlq _ShiftBpp, %%mm2 \n\t" // load b=Prior(x) step 2 |
| 3704 | "punpcklbw %%mm0, %%mm1 \n\t" // unpack High bytes of a |
| 3705 | "pxor %%mm7, %%mm7 \n\t" |
| 3706 | "punpcklbw %%mm0, %%mm2 \n\t" // unpack High bytes of b |
| 3707 | // pbv = p - b = (a + b - c) - b = a - c |
| 3708 | "movq %%mm1, %%mm5 \n\t" |
| 3709 | // pav = p - a = (a + b - c) - a = b - c |
| 3710 | "movq %%mm2, %%mm4 \n\t" |
| 3711 | "psubw %%mm3, %%mm5 \n\t" |
| 3712 | "psubw %%mm3, %%mm4 \n\t" |
| 3713 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = |
| 3714 | // pav + pbv = pbv + pav |
| 3715 | "movq %%mm5, %%mm6 \n\t" |
| 3716 | "paddw %%mm4, %%mm6 \n\t" |
| 3717 | |
| 3718 | // pa = abs(p-a) = abs(pav) |
| 3719 | // pb = abs(p-b) = abs(pbv) |
| 3720 | // pc = abs(p-c) = abs(pcv) |
| 3721 | "pcmpgtw %%mm5, %%mm0 \n\t" // create mask pbv bytes < 0 |
| 3722 | "pcmpgtw %%mm4, %%mm7 \n\t" // create mask pav bytes < 0 |
| 3723 | "pand %%mm5, %%mm0 \n\t" // only pbv bytes < 0 in mm0 |
| 3724 | "pand %%mm4, %%mm7 \n\t" // only pav bytes < 0 in mm7 |
| 3725 | "psubw %%mm0, %%mm5 \n\t" |
| 3726 | "psubw %%mm7, %%mm4 \n\t" |
| 3727 | "psubw %%mm0, %%mm5 \n\t" |
| 3728 | "psubw %%mm7, %%mm4 \n\t" |
| 3729 | "pxor %%mm0, %%mm0 \n\t" |
| 3730 | "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0 |
| 3731 | "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7 |
| 3732 | "psubw %%mm0, %%mm6 \n\t" |
| 3733 | // test pa <= pb |
| 3734 | "movq %%mm4, %%mm7 \n\t" |
| 3735 | "psubw %%mm0, %%mm6 \n\t" |
| 3736 | "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb? |
| 3737 | "movq %%mm7, %%mm0 \n\t" |
| 3738 | // use mm7 mask to merge pa & pb |
| 3739 | "pand %%mm7, %%mm5 \n\t" |
| 3740 | // use mm0 mask copy to merge a & b |
| 3741 | "pand %%mm0, %%mm2 \n\t" |
| 3742 | "pandn %%mm4, %%mm7 \n\t" |
| 3743 | "pandn %%mm1, %%mm0 \n\t" |
| 3744 | "paddw %%mm5, %%mm7 \n\t" |
| 3745 | "paddw %%mm2, %%mm0 \n\t" |
| 3746 | // test ((pa <= pb)? pa:pb) <= pc |
| 3747 | "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc? |
| 3748 | "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x) |
| 3749 | "pand %%mm7, %%mm3 \n\t" |
| 3750 | "pandn %%mm0, %%mm7 \n\t" |
| 3751 | "pxor %%mm1, %%mm1 \n\t" |
| 3752 | "paddw %%mm3, %%mm7 \n\t" |
| 3753 | "pxor %%mm0, %%mm0 \n\t" |
| 3754 | "packuswb %%mm1, %%mm7 \n\t" |
| 3755 | "movq %%mm2, %%mm3 \n\t" // load c=Prior(x-bpp) step 1 |
| 3756 | "pand _ActiveMask, %%mm7 \n\t" |
| 3757 | "punpckhbw %%mm0, %%mm2 \n\t" // unpack High bytes of b |
| 3758 | "psllq _ShiftBpp, %%mm7 \n\t" // shift bytes to 2nd group of |
| 3759 | // 3 bytes |
| 3760 | // pav = p - a = (a + b - c) - a = b - c |
| 3761 | "movq %%mm2, %%mm4 \n\t" |
| 3762 | "paddb (%%edi,%%ecx,), %%mm7 \n\t" // add Paeth predictor with Raw(x) |
| 3763 | "psllq _ShiftBpp, %%mm3 \n\t" // load c=Prior(x-bpp) step 2 |
| 3764 | "movq %%mm7, (%%edi,%%ecx,) \n\t" // write back updated value |
| 3765 | "movq %%mm7, %%mm1 \n\t" |
| 3766 | "punpckhbw %%mm0, %%mm3 \n\t" // unpack High bytes of c |
| 3767 | "psllq _ShiftBpp, %%mm1 \n\t" // shift bytes |
| 3768 | // now mm1 will be used as Raw(x-bpp) |
| 3769 | // now do Paeth for 3rd, and final, set of bytes (6-7) |
| 3770 | "pxor %%mm7, %%mm7 \n\t" |
| 3771 | "punpckhbw %%mm0, %%mm1 \n\t" // unpack High bytes of a |
| 3772 | "psubw %%mm3, %%mm4 \n\t" |
| 3773 | // pbv = p - b = (a + b - c) - b = a - c |
| 3774 | "movq %%mm1, %%mm5 \n\t" |
| 3775 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv |
| 3776 | "movq %%mm4, %%mm6 \n\t" |
| 3777 | "psubw %%mm3, %%mm5 \n\t" |
| 3778 | "pxor %%mm0, %%mm0 \n\t" |
| 3779 | "paddw %%mm5, %%mm6 \n\t" |
| 3780 | |
| 3781 | // pa = abs(p-a) = abs(pav) |
| 3782 | // pb = abs(p-b) = abs(pbv) |
| 3783 | // pc = abs(p-c) = abs(pcv) |
| 3784 | "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0 |
| 3785 | "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0 |
| 3786 | "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7 |
| 3787 | "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0 |
| 3788 | "psubw %%mm0, %%mm4 \n\t" |
| 3789 | "psubw %%mm7, %%mm5 \n\t" |
| 3790 | "psubw %%mm0, %%mm4 \n\t" |
| 3791 | "psubw %%mm7, %%mm5 \n\t" |
| 3792 | "pxor %%mm0, %%mm0 \n\t" |
| 3793 | "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0 |
| 3794 | "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7 |
| 3795 | "psubw %%mm0, %%mm6 \n\t" |
| 3796 | // test pa <= pb |
| 3797 | "movq %%mm4, %%mm7 \n\t" |
| 3798 | "psubw %%mm0, %%mm6 \n\t" |
| 3799 | "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb? |
| 3800 | "movq %%mm7, %%mm0 \n\t" |
| 3801 | // use mm0 mask copy to merge a & b |
| 3802 | "pand %%mm0, %%mm2 \n\t" |
| 3803 | // use mm7 mask to merge pa & pb |
| 3804 | "pand %%mm7, %%mm5 \n\t" |
| 3805 | "pandn %%mm1, %%mm0 \n\t" |
| 3806 | "pandn %%mm4, %%mm7 \n\t" |
| 3807 | "paddw %%mm2, %%mm0 \n\t" |
| 3808 | "paddw %%mm5, %%mm7 \n\t" |
| 3809 | // test ((pa <= pb)? pa:pb) <= pc |
| 3810 | "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc? |
| 3811 | "pand %%mm7, %%mm3 \n\t" |
| 3812 | "pandn %%mm0, %%mm7 \n\t" |
| 3813 | "paddw %%mm3, %%mm7 \n\t" |
| 3814 | "pxor %%mm1, %%mm1 \n\t" |
| 3815 | "packuswb %%mm7, %%mm1 \n\t" |
| 3816 | // step ecx to next set of 8 bytes and repeat loop til done |
| 3817 | "addl $8, %%ecx \n\t" |
| 3818 | "pand _ActiveMaskEnd, %%mm1 \n\t" |
| 3819 | "paddb -8(%%edi,%%ecx,), %%mm1 \n\t" // add Paeth predictor with |
| 3820 | // Raw(x) |
| 3821 | |
| 3822 | "cmpl _MMXLength, %%ecx \n\t" |
| 3823 | "pxor %%mm0, %%mm0 \n\t" // pxor does not affect flags |
| 3824 | "movq %%mm1, -8(%%edi,%%ecx,) \n\t" // write back updated value |
| 3825 | // mm1 will be used as Raw(x-bpp) next loop |
| 3826 | // mm3 ready to be used as Prior(x-bpp) next loop |
| 3827 | "jb paeth_3lp \n\t" |
| 3828 | |
| 3829 | : "=S" (dummy_value_S), // output regs (dummy) |
| 3830 | "=D" (dummy_value_D) |
| 3831 | |
| 3832 | : "0" (prev_row), // esi // input regs |
| 3833 | "1" (row) // edi |
| 3834 | |
| 3835 | : "%ecx" // clobber list |
| 3836 | #if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 3837 | , "%mm0", "%mm1", "%mm2", "%mm3" |
| 3838 | , "%mm4", "%mm5", "%mm6", "%mm7" |
| 3839 | #endif |
| 3840 | ); |
| 3841 | } |
| 3842 | break; // end 3 bpp |
| 3843 | |
| 3844 | case 6: |
| 3845 | //case 7: // GRR BOGUS |
| 3846 | //case 5: // GRR BOGUS |
| 3847 | { |
| 3848 | _ActiveMask.use = 0x00000000ffffffffLL; |
| 3849 | _ActiveMask2.use = 0xffffffff00000000LL; |
| 3850 | _ShiftBpp.use = bpp << 3; // == bpp * 8 |
| 3851 | _ShiftRem.use = 64 - _ShiftBpp.use; |
| 3852 | |
| 3853 | __asm__ __volatile__ ( |
| 3854 | "movl _dif, %%ecx \n\t" |
| 3855 | // preload "movl row, %%edi \n\t" |
| 3856 | // preload "movl prev_row, %%esi \n\t" |
| 3857 | // prime the pump: load the first Raw(x-bpp) data set |
| 3858 | "movq -8(%%edi,%%ecx,), %%mm1 \n\t" |
| 3859 | "pxor %%mm0, %%mm0 \n\t" |
| 3860 | |
| 3861 | "paeth_6lp: \n\t" |
| 3862 | // must shift to position Raw(x-bpp) data |
| 3863 | "psrlq _ShiftRem, %%mm1 \n\t" |
| 3864 | // do first set of 4 bytes |
| 3865 | "movq -8(%%esi,%%ecx,), %%mm3 \n\t" // read c=Prior(x-bpp) bytes |
| 3866 | "punpcklbw %%mm0, %%mm1 \n\t" // unpack Low bytes of a |
| 3867 | "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x) |
| 3868 | "punpcklbw %%mm0, %%mm2 \n\t" // unpack Low bytes of b |
| 3869 | // must shift to position Prior(x-bpp) data |
| 3870 | "psrlq _ShiftRem, %%mm3 \n\t" |
| 3871 | // pav = p - a = (a + b - c) - a = b - c |
| 3872 | "movq %%mm2, %%mm4 \n\t" |
| 3873 | "punpcklbw %%mm0, %%mm3 \n\t" // unpack Low bytes of c |
| 3874 | // pbv = p - b = (a + b - c) - b = a - c |
| 3875 | "movq %%mm1, %%mm5 \n\t" |
| 3876 | "psubw %%mm3, %%mm4 \n\t" |
| 3877 | "pxor %%mm7, %%mm7 \n\t" |
| 3878 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv |
| 3879 | "movq %%mm4, %%mm6 \n\t" |
| 3880 | "psubw %%mm3, %%mm5 \n\t" |
| 3881 | // pa = abs(p-a) = abs(pav) |
| 3882 | // pb = abs(p-b) = abs(pbv) |
| 3883 | // pc = abs(p-c) = abs(pcv) |
| 3884 | "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0 |
| 3885 | "paddw %%mm5, %%mm6 \n\t" |
| 3886 | "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7 |
| 3887 | "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0 |
| 3888 | "psubw %%mm0, %%mm4 \n\t" |
| 3889 | "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0 |
| 3890 | "psubw %%mm0, %%mm4 \n\t" |
| 3891 | "psubw %%mm7, %%mm5 \n\t" |
| 3892 | "pxor %%mm0, %%mm0 \n\t" |
| 3893 | "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0 |
| 3894 | "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7 |
| 3895 | "psubw %%mm7, %%mm5 \n\t" |
| 3896 | "psubw %%mm0, %%mm6 \n\t" |
| 3897 | // test pa <= pb |
| 3898 | "movq %%mm4, %%mm7 \n\t" |
| 3899 | "psubw %%mm0, %%mm6 \n\t" |
| 3900 | "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb? |
| 3901 | "movq %%mm7, %%mm0 \n\t" |
| 3902 | // use mm7 mask to merge pa & pb |
| 3903 | "pand %%mm7, %%mm5 \n\t" |
| 3904 | // use mm0 mask copy to merge a & b |
| 3905 | "pand %%mm0, %%mm2 \n\t" |
| 3906 | "pandn %%mm4, %%mm7 \n\t" |
| 3907 | "pandn %%mm1, %%mm0 \n\t" |
| 3908 | "paddw %%mm5, %%mm7 \n\t" |
| 3909 | "paddw %%mm2, %%mm0 \n\t" |
| 3910 | // test ((pa <= pb)? pa:pb) <= pc |
| 3911 | "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc? |
| 3912 | "pxor %%mm1, %%mm1 \n\t" |
| 3913 | "pand %%mm7, %%mm3 \n\t" |
| 3914 | "pandn %%mm0, %%mm7 \n\t" |
| 3915 | "paddw %%mm3, %%mm7 \n\t" |
| 3916 | "pxor %%mm0, %%mm0 \n\t" |
| 3917 | "packuswb %%mm1, %%mm7 \n\t" |
| 3918 | "movq -8(%%esi,%%ecx,), %%mm3 \n\t" // load c=Prior(x-bpp) |
| 3919 | "pand _ActiveMask, %%mm7 \n\t" |
| 3920 | "psrlq _ShiftRem, %%mm3 \n\t" |
| 3921 | "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x) step 1 |
| 3922 | "paddb (%%edi,%%ecx,), %%mm7 \n\t" // add Paeth predictor and Raw(x) |
| 3923 | "movq %%mm2, %%mm6 \n\t" |
| 3924 | "movq %%mm7, (%%edi,%%ecx,) \n\t" // write back updated value |
| 3925 | "movq -8(%%edi,%%ecx,), %%mm1 \n\t" |
| 3926 | "psllq _ShiftBpp, %%mm6 \n\t" |
| 3927 | "movq %%mm7, %%mm5 \n\t" |
| 3928 | "psrlq _ShiftRem, %%mm1 \n\t" |
| 3929 | "por %%mm6, %%mm3 \n\t" |
| 3930 | "psllq _ShiftBpp, %%mm5 \n\t" |
| 3931 | "punpckhbw %%mm0, %%mm3 \n\t" // unpack High bytes of c |
| 3932 | "por %%mm5, %%mm1 \n\t" |
| 3933 | // do second set of 4 bytes |
| 3934 | "punpckhbw %%mm0, %%mm2 \n\t" // unpack High bytes of b |
| 3935 | "punpckhbw %%mm0, %%mm1 \n\t" // unpack High bytes of a |
| 3936 | // pav = p - a = (a + b - c) - a = b - c |
| 3937 | "movq %%mm2, %%mm4 \n\t" |
| 3938 | // pbv = p - b = (a + b - c) - b = a - c |
| 3939 | "movq %%mm1, %%mm5 \n\t" |
| 3940 | "psubw %%mm3, %%mm4 \n\t" |
| 3941 | "pxor %%mm7, %%mm7 \n\t" |
| 3942 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv |
| 3943 | "movq %%mm4, %%mm6 \n\t" |
| 3944 | "psubw %%mm3, %%mm5 \n\t" |
| 3945 | // pa = abs(p-a) = abs(pav) |
| 3946 | // pb = abs(p-b) = abs(pbv) |
| 3947 | // pc = abs(p-c) = abs(pcv) |
| 3948 | "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0 |
| 3949 | "paddw %%mm5, %%mm6 \n\t" |
| 3950 | "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7 |
| 3951 | "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0 |
| 3952 | "psubw %%mm0, %%mm4 \n\t" |
| 3953 | "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0 |
| 3954 | "psubw %%mm0, %%mm4 \n\t" |
| 3955 | "psubw %%mm7, %%mm5 \n\t" |
| 3956 | "pxor %%mm0, %%mm0 \n\t" |
| 3957 | "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0 |
| 3958 | "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7 |
| 3959 | "psubw %%mm7, %%mm5 \n\t" |
| 3960 | "psubw %%mm0, %%mm6 \n\t" |
| 3961 | // test pa <= pb |
| 3962 | "movq %%mm4, %%mm7 \n\t" |
| 3963 | "psubw %%mm0, %%mm6 \n\t" |
| 3964 | "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb? |
| 3965 | "movq %%mm7, %%mm0 \n\t" |
| 3966 | // use mm7 mask to merge pa & pb |
| 3967 | "pand %%mm7, %%mm5 \n\t" |
| 3968 | // use mm0 mask copy to merge a & b |
| 3969 | "pand %%mm0, %%mm2 \n\t" |
| 3970 | "pandn %%mm4, %%mm7 \n\t" |
| 3971 | "pandn %%mm1, %%mm0 \n\t" |
| 3972 | "paddw %%mm5, %%mm7 \n\t" |
| 3973 | "paddw %%mm2, %%mm0 \n\t" |
| 3974 | // test ((pa <= pb)? pa:pb) <= pc |
| 3975 | "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc? |
| 3976 | "pxor %%mm1, %%mm1 \n\t" |
| 3977 | "pand %%mm7, %%mm3 \n\t" |
| 3978 | "pandn %%mm0, %%mm7 \n\t" |
| 3979 | "pxor %%mm1, %%mm1 \n\t" |
| 3980 | "paddw %%mm3, %%mm7 \n\t" |
| 3981 | "pxor %%mm0, %%mm0 \n\t" |
| 3982 | // step ecx to next set of 8 bytes and repeat loop til done |
| 3983 | "addl $8, %%ecx \n\t" |
| 3984 | "packuswb %%mm7, %%mm1 \n\t" |
| 3985 | "paddb -8(%%edi,%%ecx,), %%mm1 \n\t" // add Paeth predictor with Raw(x) |
| 3986 | "cmpl _MMXLength, %%ecx \n\t" |
| 3987 | "movq %%mm1, -8(%%edi,%%ecx,) \n\t" // write back updated value |
| 3988 | // mm1 will be used as Raw(x-bpp) next loop |
| 3989 | "jb paeth_6lp \n\t" |
| 3990 | |
| 3991 | : "=S" (dummy_value_S), // output regs (dummy) |
| 3992 | "=D" (dummy_value_D) |
| 3993 | |
| 3994 | : "0" (prev_row), // esi // input regs |
| 3995 | "1" (row) // edi |
| 3996 | |
| 3997 | : "%ecx" // clobber list |
| 3998 | #if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 3999 | , "%mm0", "%mm1", "%mm2", "%mm3" |
| 4000 | , "%mm4", "%mm5", "%mm6", "%mm7" |
| 4001 | #endif |
| 4002 | ); |
| 4003 | } |
| 4004 | break; // end 6 bpp |
| 4005 | |
| 4006 | case 4: |
| 4007 | { |
| 4008 | _ActiveMask.use = 0x00000000ffffffffLL; |
| 4009 | |
| 4010 | __asm__ __volatile__ ( |
| 4011 | "movl _dif, %%ecx \n\t" |
| 4012 | // preload "movl row, %%edi \n\t" |
| 4013 | // preload "movl prev_row, %%esi \n\t" |
| 4014 | "pxor %%mm0, %%mm0 \n\t" |
| 4015 | // prime the pump: load the first Raw(x-bpp) data set |
| 4016 | "movq -8(%%edi,%%ecx,), %%mm1 \n\t" // only time should need to read |
| 4017 | // a=Raw(x-bpp) bytes |
| 4018 | "paeth_4lp: \n\t" |
| 4019 | // do first set of 4 bytes |
| 4020 | "movq -8(%%esi,%%ecx,), %%mm3 \n\t" // read c=Prior(x-bpp) bytes |
| 4021 | "punpckhbw %%mm0, %%mm1 \n\t" // unpack Low bytes of a |
| 4022 | "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x) |
| 4023 | "punpcklbw %%mm0, %%mm2 \n\t" // unpack High bytes of b |
| 4024 | // pav = p - a = (a + b - c) - a = b - c |
| 4025 | "movq %%mm2, %%mm4 \n\t" |
| 4026 | "punpckhbw %%mm0, %%mm3 \n\t" // unpack High bytes of c |
| 4027 | // pbv = p - b = (a + b - c) - b = a - c |
| 4028 | "movq %%mm1, %%mm5 \n\t" |
| 4029 | "psubw %%mm3, %%mm4 \n\t" |
| 4030 | "pxor %%mm7, %%mm7 \n\t" |
| 4031 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv |
| 4032 | "movq %%mm4, %%mm6 \n\t" |
| 4033 | "psubw %%mm3, %%mm5 \n\t" |
| 4034 | // pa = abs(p-a) = abs(pav) |
| 4035 | // pb = abs(p-b) = abs(pbv) |
| 4036 | // pc = abs(p-c) = abs(pcv) |
| 4037 | "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0 |
| 4038 | "paddw %%mm5, %%mm6 \n\t" |
| 4039 | "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7 |
| 4040 | "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0 |
| 4041 | "psubw %%mm0, %%mm4 \n\t" |
| 4042 | "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0 |
| 4043 | "psubw %%mm0, %%mm4 \n\t" |
| 4044 | "psubw %%mm7, %%mm5 \n\t" |
| 4045 | "pxor %%mm0, %%mm0 \n\t" |
| 4046 | "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0 |
| 4047 | "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7 |
| 4048 | "psubw %%mm7, %%mm5 \n\t" |
| 4049 | "psubw %%mm0, %%mm6 \n\t" |
| 4050 | // test pa <= pb |
| 4051 | "movq %%mm4, %%mm7 \n\t" |
| 4052 | "psubw %%mm0, %%mm6 \n\t" |
| 4053 | "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb? |
| 4054 | "movq %%mm7, %%mm0 \n\t" |
| 4055 | // use mm7 mask to merge pa & pb |
| 4056 | "pand %%mm7, %%mm5 \n\t" |
| 4057 | // use mm0 mask copy to merge a & b |
| 4058 | "pand %%mm0, %%mm2 \n\t" |
| 4059 | "pandn %%mm4, %%mm7 \n\t" |
| 4060 | "pandn %%mm1, %%mm0 \n\t" |
| 4061 | "paddw %%mm5, %%mm7 \n\t" |
| 4062 | "paddw %%mm2, %%mm0 \n\t" |
| 4063 | // test ((pa <= pb)? pa:pb) <= pc |
| 4064 | "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc? |
| 4065 | "pxor %%mm1, %%mm1 \n\t" |
| 4066 | "pand %%mm7, %%mm3 \n\t" |
| 4067 | "pandn %%mm0, %%mm7 \n\t" |
| 4068 | "paddw %%mm3, %%mm7 \n\t" |
| 4069 | "pxor %%mm0, %%mm0 \n\t" |
| 4070 | "packuswb %%mm1, %%mm7 \n\t" |
| 4071 | "movq (%%esi,%%ecx,), %%mm3 \n\t" // load c=Prior(x-bpp) |
| 4072 | "pand _ActiveMask, %%mm7 \n\t" |
| 4073 | "movq %%mm3, %%mm2 \n\t" // load b=Prior(x) step 1 |
| 4074 | "paddb (%%edi,%%ecx,), %%mm7 \n\t" // add Paeth predictor with Raw(x) |
| 4075 | "punpcklbw %%mm0, %%mm3 \n\t" // unpack High bytes of c |
| 4076 | "movq %%mm7, (%%edi,%%ecx,) \n\t" // write back updated value |
| 4077 | "movq %%mm7, %%mm1 \n\t" // now mm1 will be used as Raw(x-bpp) |
| 4078 | // do second set of 4 bytes |
| 4079 | "punpckhbw %%mm0, %%mm2 \n\t" // unpack Low bytes of b |
| 4080 | "punpcklbw %%mm0, %%mm1 \n\t" // unpack Low bytes of a |
| 4081 | // pav = p - a = (a + b - c) - a = b - c |
| 4082 | "movq %%mm2, %%mm4 \n\t" |
| 4083 | // pbv = p - b = (a + b - c) - b = a - c |
| 4084 | "movq %%mm1, %%mm5 \n\t" |
| 4085 | "psubw %%mm3, %%mm4 \n\t" |
| 4086 | "pxor %%mm7, %%mm7 \n\t" |
| 4087 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv |
| 4088 | "movq %%mm4, %%mm6 \n\t" |
| 4089 | "psubw %%mm3, %%mm5 \n\t" |
| 4090 | // pa = abs(p-a) = abs(pav) |
| 4091 | // pb = abs(p-b) = abs(pbv) |
| 4092 | // pc = abs(p-c) = abs(pcv) |
| 4093 | "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0 |
| 4094 | "paddw %%mm5, %%mm6 \n\t" |
| 4095 | "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7 |
| 4096 | "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0 |
| 4097 | "psubw %%mm0, %%mm4 \n\t" |
| 4098 | "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0 |
| 4099 | "psubw %%mm0, %%mm4 \n\t" |
| 4100 | "psubw %%mm7, %%mm5 \n\t" |
| 4101 | "pxor %%mm0, %%mm0 \n\t" |
| 4102 | "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0 |
| 4103 | "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7 |
| 4104 | "psubw %%mm7, %%mm5 \n\t" |
| 4105 | "psubw %%mm0, %%mm6 \n\t" |
| 4106 | // test pa <= pb |
| 4107 | "movq %%mm4, %%mm7 \n\t" |
| 4108 | "psubw %%mm0, %%mm6 \n\t" |
| 4109 | "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb? |
| 4110 | "movq %%mm7, %%mm0 \n\t" |
| 4111 | // use mm7 mask to merge pa & pb |
| 4112 | "pand %%mm7, %%mm5 \n\t" |
| 4113 | // use mm0 mask copy to merge a & b |
| 4114 | "pand %%mm0, %%mm2 \n\t" |
| 4115 | "pandn %%mm4, %%mm7 \n\t" |
| 4116 | "pandn %%mm1, %%mm0 \n\t" |
| 4117 | "paddw %%mm5, %%mm7 \n\t" |
| 4118 | "paddw %%mm2, %%mm0 \n\t" |
| 4119 | // test ((pa <= pb)? pa:pb) <= pc |
| 4120 | "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc? |
| 4121 | "pxor %%mm1, %%mm1 \n\t" |
| 4122 | "pand %%mm7, %%mm3 \n\t" |
| 4123 | "pandn %%mm0, %%mm7 \n\t" |
| 4124 | "pxor %%mm1, %%mm1 \n\t" |
| 4125 | "paddw %%mm3, %%mm7 \n\t" |
| 4126 | "pxor %%mm0, %%mm0 \n\t" |
| 4127 | // step ecx to next set of 8 bytes and repeat loop til done |
| 4128 | "addl $8, %%ecx \n\t" |
| 4129 | "packuswb %%mm7, %%mm1 \n\t" |
| 4130 | "paddb -8(%%edi,%%ecx,), %%mm1 \n\t" // add predictor with Raw(x) |
| 4131 | "cmpl _MMXLength, %%ecx \n\t" |
| 4132 | "movq %%mm1, -8(%%edi,%%ecx,) \n\t" // write back updated value |
| 4133 | // mm1 will be used as Raw(x-bpp) next loop |
| 4134 | "jb paeth_4lp \n\t" |
| 4135 | |
| 4136 | : "=S" (dummy_value_S), // output regs (dummy) |
| 4137 | "=D" (dummy_value_D) |
| 4138 | |
| 4139 | : "0" (prev_row), // esi // input regs |
| 4140 | "1" (row) // edi |
| 4141 | |
| 4142 | : "%ecx" // clobber list |
| 4143 | #if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 4144 | , "%mm0", "%mm1", "%mm2", "%mm3" |
| 4145 | , "%mm4", "%mm5", "%mm6", "%mm7" |
| 4146 | #endif |
| 4147 | ); |
| 4148 | } |
| 4149 | break; // end 4 bpp |
| 4150 | |
| 4151 | case 8: // bpp == 8 |
| 4152 | { |
| 4153 | _ActiveMask.use = 0x00000000ffffffffLL; |
| 4154 | |
| 4155 | __asm__ __volatile__ ( |
| 4156 | "movl _dif, %%ecx \n\t" |
| 4157 | // preload "movl row, %%edi \n\t" |
| 4158 | // preload "movl prev_row, %%esi \n\t" |
| 4159 | "pxor %%mm0, %%mm0 \n\t" |
| 4160 | // prime the pump: load the first Raw(x-bpp) data set |
| 4161 | "movq -8(%%edi,%%ecx,), %%mm1 \n\t" // only time should need to read |
| 4162 | // a=Raw(x-bpp) bytes |
| 4163 | "paeth_8lp: \n\t" |
| 4164 | // do first set of 4 bytes |
| 4165 | "movq -8(%%esi,%%ecx,), %%mm3 \n\t" // read c=Prior(x-bpp) bytes |
| 4166 | "punpcklbw %%mm0, %%mm1 \n\t" // unpack Low bytes of a |
| 4167 | "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x) |
| 4168 | "punpcklbw %%mm0, %%mm2 \n\t" // unpack Low bytes of b |
| 4169 | // pav = p - a = (a + b - c) - a = b - c |
| 4170 | "movq %%mm2, %%mm4 \n\t" |
| 4171 | "punpcklbw %%mm0, %%mm3 \n\t" // unpack Low bytes of c |
| 4172 | // pbv = p - b = (a + b - c) - b = a - c |
| 4173 | "movq %%mm1, %%mm5 \n\t" |
| 4174 | "psubw %%mm3, %%mm4 \n\t" |
| 4175 | "pxor %%mm7, %%mm7 \n\t" |
| 4176 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv |
| 4177 | "movq %%mm4, %%mm6 \n\t" |
| 4178 | "psubw %%mm3, %%mm5 \n\t" |
| 4179 | // pa = abs(p-a) = abs(pav) |
| 4180 | // pb = abs(p-b) = abs(pbv) |
| 4181 | // pc = abs(p-c) = abs(pcv) |
| 4182 | "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0 |
| 4183 | "paddw %%mm5, %%mm6 \n\t" |
| 4184 | "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7 |
| 4185 | "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0 |
| 4186 | "psubw %%mm0, %%mm4 \n\t" |
| 4187 | "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0 |
| 4188 | "psubw %%mm0, %%mm4 \n\t" |
| 4189 | "psubw %%mm7, %%mm5 \n\t" |
| 4190 | "pxor %%mm0, %%mm0 \n\t" |
| 4191 | "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0 |
| 4192 | "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7 |
| 4193 | "psubw %%mm7, %%mm5 \n\t" |
| 4194 | "psubw %%mm0, %%mm6 \n\t" |
| 4195 | // test pa <= pb |
| 4196 | "movq %%mm4, %%mm7 \n\t" |
| 4197 | "psubw %%mm0, %%mm6 \n\t" |
| 4198 | "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb? |
| 4199 | "movq %%mm7, %%mm0 \n\t" |
| 4200 | // use mm7 mask to merge pa & pb |
| 4201 | "pand %%mm7, %%mm5 \n\t" |
| 4202 | // use mm0 mask copy to merge a & b |
| 4203 | "pand %%mm0, %%mm2 \n\t" |
| 4204 | "pandn %%mm4, %%mm7 \n\t" |
| 4205 | "pandn %%mm1, %%mm0 \n\t" |
| 4206 | "paddw %%mm5, %%mm7 \n\t" |
| 4207 | "paddw %%mm2, %%mm0 \n\t" |
| 4208 | // test ((pa <= pb)? pa:pb) <= pc |
| 4209 | "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc? |
| 4210 | "pxor %%mm1, %%mm1 \n\t" |
| 4211 | "pand %%mm7, %%mm3 \n\t" |
| 4212 | "pandn %%mm0, %%mm7 \n\t" |
| 4213 | "paddw %%mm3, %%mm7 \n\t" |
| 4214 | "pxor %%mm0, %%mm0 \n\t" |
| 4215 | "packuswb %%mm1, %%mm7 \n\t" |
| 4216 | "movq -8(%%esi,%%ecx,), %%mm3 \n\t" // read c=Prior(x-bpp) bytes |
| 4217 | "pand _ActiveMask, %%mm7 \n\t" |
| 4218 | "movq (%%esi,%%ecx,), %%mm2 \n\t" // load b=Prior(x) |
| 4219 | "paddb (%%edi,%%ecx,), %%mm7 \n\t" // add Paeth predictor with Raw(x) |
| 4220 | "punpckhbw %%mm0, %%mm3 \n\t" // unpack High bytes of c |
| 4221 | "movq %%mm7, (%%edi,%%ecx,) \n\t" // write back updated value |
| 4222 | "movq -8(%%edi,%%ecx,), %%mm1 \n\t" // read a=Raw(x-bpp) bytes |
| 4223 | |
| 4224 | // do second set of 4 bytes |
| 4225 | "punpckhbw %%mm0, %%mm2 \n\t" // unpack High bytes of b |
| 4226 | "punpckhbw %%mm0, %%mm1 \n\t" // unpack High bytes of a |
| 4227 | // pav = p - a = (a + b - c) - a = b - c |
| 4228 | "movq %%mm2, %%mm4 \n\t" |
| 4229 | // pbv = p - b = (a + b - c) - b = a - c |
| 4230 | "movq %%mm1, %%mm5 \n\t" |
| 4231 | "psubw %%mm3, %%mm4 \n\t" |
| 4232 | "pxor %%mm7, %%mm7 \n\t" |
| 4233 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv |
| 4234 | "movq %%mm4, %%mm6 \n\t" |
| 4235 | "psubw %%mm3, %%mm5 \n\t" |
| 4236 | // pa = abs(p-a) = abs(pav) |
| 4237 | // pb = abs(p-b) = abs(pbv) |
| 4238 | // pc = abs(p-c) = abs(pcv) |
| 4239 | "pcmpgtw %%mm4, %%mm0 \n\t" // create mask pav bytes < 0 |
| 4240 | "paddw %%mm5, %%mm6 \n\t" |
| 4241 | "pand %%mm4, %%mm0 \n\t" // only pav bytes < 0 in mm7 |
| 4242 | "pcmpgtw %%mm5, %%mm7 \n\t" // create mask pbv bytes < 0 |
| 4243 | "psubw %%mm0, %%mm4 \n\t" |
| 4244 | "pand %%mm5, %%mm7 \n\t" // only pbv bytes < 0 in mm0 |
| 4245 | "psubw %%mm0, %%mm4 \n\t" |
| 4246 | "psubw %%mm7, %%mm5 \n\t" |
| 4247 | "pxor %%mm0, %%mm0 \n\t" |
| 4248 | "pcmpgtw %%mm6, %%mm0 \n\t" // create mask pcv bytes < 0 |
| 4249 | "pand %%mm6, %%mm0 \n\t" // only pav bytes < 0 in mm7 |
| 4250 | "psubw %%mm7, %%mm5 \n\t" |
| 4251 | "psubw %%mm0, %%mm6 \n\t" |
| 4252 | // test pa <= pb |
| 4253 | "movq %%mm4, %%mm7 \n\t" |
| 4254 | "psubw %%mm0, %%mm6 \n\t" |
| 4255 | "pcmpgtw %%mm5, %%mm7 \n\t" // pa > pb? |
| 4256 | "movq %%mm7, %%mm0 \n\t" |
| 4257 | // use mm7 mask to merge pa & pb |
| 4258 | "pand %%mm7, %%mm5 \n\t" |
| 4259 | // use mm0 mask copy to merge a & b |
| 4260 | "pand %%mm0, %%mm2 \n\t" |
| 4261 | "pandn %%mm4, %%mm7 \n\t" |
| 4262 | "pandn %%mm1, %%mm0 \n\t" |
| 4263 | "paddw %%mm5, %%mm7 \n\t" |
| 4264 | "paddw %%mm2, %%mm0 \n\t" |
| 4265 | // test ((pa <= pb)? pa:pb) <= pc |
| 4266 | "pcmpgtw %%mm6, %%mm7 \n\t" // pab > pc? |
| 4267 | "pxor %%mm1, %%mm1 \n\t" |
| 4268 | "pand %%mm7, %%mm3 \n\t" |
| 4269 | "pandn %%mm0, %%mm7 \n\t" |
| 4270 | "pxor %%mm1, %%mm1 \n\t" |
| 4271 | "paddw %%mm3, %%mm7 \n\t" |
| 4272 | "pxor %%mm0, %%mm0 \n\t" |
| 4273 | // step ecx to next set of 8 bytes and repeat loop til done |
| 4274 | "addl $8, %%ecx \n\t" |
| 4275 | "packuswb %%mm7, %%mm1 \n\t" |
| 4276 | "paddb -8(%%edi,%%ecx,), %%mm1 \n\t" // add Paeth predictor with Raw(x) |
| 4277 | "cmpl _MMXLength, %%ecx \n\t" |
| 4278 | "movq %%mm1, -8(%%edi,%%ecx,) \n\t" // write back updated value |
| 4279 | // mm1 will be used as Raw(x-bpp) next loop |
| 4280 | "jb paeth_8lp \n\t" |
| 4281 | |
| 4282 | : "=S" (dummy_value_S), // output regs (dummy) |
| 4283 | "=D" (dummy_value_D) |
| 4284 | |
| 4285 | : "0" (prev_row), // esi // input regs |
| 4286 | "1" (row) // edi |
| 4287 | |
| 4288 | : "%ecx" // clobber list |
| 4289 | #if 0 /* %mm0, ..., %mm7 not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 4290 | , "%mm0", "%mm1", "%mm2", "%mm3" |
| 4291 | , "%mm4", "%mm5", "%mm6", "%mm7" |
| 4292 | #endif |
| 4293 | ); |
| 4294 | } |
| 4295 | break; // end 8 bpp |
| 4296 | |
| 4297 | case 1: // bpp = 1 |
| 4298 | case 2: // bpp = 2 |
| 4299 | default: // bpp > 8 |
| 4300 | { |
| 4301 | __asm__ __volatile__ ( |
| 4302 | #ifdef __PIC__ |
| 4303 | "pushl %%ebx \n\t" // save Global Offset Table index |
| 4304 | #endif |
| 4305 | "movl _dif, %%ebx \n\t" |
| 4306 | "cmpl _FullLength, %%ebx \n\t" |
| 4307 | "jnb paeth_dend \n\t" |
| 4308 | |
| 4309 | // preload "movl row, %%edi \n\t" |
| 4310 | // preload "movl prev_row, %%esi \n\t" |
| 4311 | // do Paeth decode for remaining bytes |
| 4312 | "movl %%ebx, %%edx \n\t" |
| 4313 | // preload "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx) |
| 4314 | "subl %%ecx, %%edx \n\t" // edx = ebx - bpp |
| 4315 | "xorl %%ecx, %%ecx \n\t" // zero ecx before using cl & cx |
| 4316 | |
| 4317 | "paeth_dlp: \n\t" |
| 4318 | "xorl %%eax, %%eax \n\t" |
| 4319 | // pav = p - a = (a + b - c) - a = b - c |
| 4320 | "movb (%%esi,%%ebx,), %%al \n\t" // load Prior(x) into al |
| 4321 | "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl |
| 4322 | "subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp) |
| 4323 | "movl %%eax, _patemp \n\t" // Save pav for later use |
| 4324 | "xorl %%eax, %%eax \n\t" |
| 4325 | // pbv = p - b = (a + b - c) - b = a - c |
| 4326 | "movb (%%edi,%%edx,), %%al \n\t" // load Raw(x-bpp) into al |
| 4327 | "subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp) |
| 4328 | "movl %%eax, %%ecx \n\t" |
| 4329 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv |
| 4330 | "addl _patemp, %%eax \n\t" // pcv = pav + pbv |
| 4331 | // pc = abs(pcv) |
| 4332 | "testl $0x80000000, %%eax \n\t" |
| 4333 | "jz paeth_dpca \n\t" |
| 4334 | "negl %%eax \n\t" // reverse sign of neg values |
| 4335 | |
| 4336 | "paeth_dpca: \n\t" |
| 4337 | "movl %%eax, _pctemp \n\t" // save pc for later use |
| 4338 | // pb = abs(pbv) |
| 4339 | "testl $0x80000000, %%ecx \n\t" |
| 4340 | "jz paeth_dpba \n\t" |
| 4341 | "negl %%ecx \n\t" // reverse sign of neg values |
| 4342 | |
| 4343 | "paeth_dpba: \n\t" |
| 4344 | "movl %%ecx, _pbtemp \n\t" // save pb for later use |
| 4345 | // pa = abs(pav) |
| 4346 | "movl _patemp, %%eax \n\t" |
| 4347 | "testl $0x80000000, %%eax \n\t" |
| 4348 | "jz paeth_dpaa \n\t" |
| 4349 | "negl %%eax \n\t" // reverse sign of neg values |
| 4350 | |
| 4351 | "paeth_dpaa: \n\t" |
| 4352 | "movl %%eax, _patemp \n\t" // save pa for later use |
| 4353 | // test if pa <= pb |
| 4354 | "cmpl %%ecx, %%eax \n\t" |
| 4355 | "jna paeth_dabb \n\t" |
| 4356 | // pa > pb; now test if pb <= pc |
| 4357 | "cmpl _pctemp, %%ecx \n\t" |
| 4358 | "jna paeth_dbbc \n\t" |
| 4359 | // pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp) |
| 4360 | "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl |
| 4361 | "jmp paeth_dpaeth \n\t" |
| 4362 | |
| 4363 | "paeth_dbbc: \n\t" |
| 4364 | // pb <= pc; Raw(x) = Paeth(x) + Prior(x) |
| 4365 | "movb (%%esi,%%ebx,), %%cl \n\t" // load Prior(x) into cl |
| 4366 | "jmp paeth_dpaeth \n\t" |
| 4367 | |
| 4368 | "paeth_dabb: \n\t" |
| 4369 | // pa <= pb; now test if pa <= pc |
| 4370 | "cmpl _pctemp, %%eax \n\t" |
| 4371 | "jna paeth_dabc \n\t" |
| 4372 | // pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp) |
| 4373 | "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl |
| 4374 | "jmp paeth_dpaeth \n\t" |
| 4375 | |
| 4376 | "paeth_dabc: \n\t" |
| 4377 | // pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp) |
| 4378 | "movb (%%edi,%%edx,), %%cl \n\t" // load Raw(x-bpp) into cl |
| 4379 | |
| 4380 | "paeth_dpaeth: \n\t" |
| 4381 | "incl %%ebx \n\t" |
| 4382 | "incl %%edx \n\t" |
| 4383 | // Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256 |
| 4384 | "addb %%cl, -1(%%edi,%%ebx,) \n\t" |
| 4385 | "cmpl _FullLength, %%ebx \n\t" |
| 4386 | "jb paeth_dlp \n\t" |
| 4387 | |
| 4388 | "paeth_dend: \n\t" |
| 4389 | #ifdef __PIC__ |
| 4390 | "popl %%ebx \n\t" // index to Global Offset Table |
| 4391 | #endif |
| 4392 | |
| 4393 | : "=c" (dummy_value_c), // output regs (dummy) |
| 4394 | "=S" (dummy_value_S), |
| 4395 | "=D" (dummy_value_D) |
| 4396 | |
| 4397 | : "0" (bpp), // ecx // input regs |
| 4398 | "1" (prev_row), // esi |
| 4399 | "2" (row) // edi |
| 4400 | |
| 4401 | : "%eax", "%edx" // clobber list |
| 4402 | #ifndef __PIC__ |
| 4403 | , "%ebx" |
| 4404 | #endif |
| 4405 | ); |
| 4406 | } |
| 4407 | return; // No need to go further with this one |
| 4408 | |
| 4409 | } // end switch (bpp) |
| 4410 | |
| 4411 | __asm__ __volatile__ ( |
| 4412 | // MMX acceleration complete; now do clean-up |
| 4413 | // check if any remaining bytes left to decode |
| 4414 | #ifdef __PIC__ |
| 4415 | "pushl %%ebx \n\t" // save index to Global Offset Table |
| 4416 | #endif |
| 4417 | "movl _MMXLength, %%ebx \n\t" |
| 4418 | "cmpl _FullLength, %%ebx \n\t" |
| 4419 | "jnb paeth_end \n\t" |
| 4420 | //pre "movl row, %%edi \n\t" |
| 4421 | //pre "movl prev_row, %%esi \n\t" |
| 4422 | // do Paeth decode for remaining bytes |
| 4423 | "movl %%ebx, %%edx \n\t" |
| 4424 | //pre "subl bpp, %%edx \n\t" // (bpp is preloaded into ecx) |
| 4425 | "subl %%ecx, %%edx \n\t" // edx = ebx - bpp |
| 4426 | "xorl %%ecx, %%ecx \n\t" // zero ecx before using cl & cx below |
| 4427 | |
| 4428 | "paeth_lp2: \n\t" |
| 4429 | "xorl %%eax, %%eax \n\t" |
| 4430 | // pav = p - a = (a + b - c) - a = b - c |
| 4431 | "movb (%%esi,%%ebx,), %%al \n\t" // load Prior(x) into al |
| 4432 | "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl |
| 4433 | "subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp) |
| 4434 | "movl %%eax, _patemp \n\t" // Save pav for later use |
| 4435 | "xorl %%eax, %%eax \n\t" |
| 4436 | // pbv = p - b = (a + b - c) - b = a - c |
| 4437 | "movb (%%edi,%%edx,), %%al \n\t" // load Raw(x-bpp) into al |
| 4438 | "subl %%ecx, %%eax \n\t" // subtract Prior(x-bpp) |
| 4439 | "movl %%eax, %%ecx \n\t" |
| 4440 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv |
| 4441 | "addl _patemp, %%eax \n\t" // pcv = pav + pbv |
| 4442 | // pc = abs(pcv) |
| 4443 | "testl $0x80000000, %%eax \n\t" |
| 4444 | "jz paeth_pca2 \n\t" |
| 4445 | "negl %%eax \n\t" // reverse sign of neg values |
| 4446 | |
| 4447 | "paeth_pca2: \n\t" |
| 4448 | "movl %%eax, _pctemp \n\t" // save pc for later use |
| 4449 | // pb = abs(pbv) |
| 4450 | "testl $0x80000000, %%ecx \n\t" |
| 4451 | "jz paeth_pba2 \n\t" |
| 4452 | "negl %%ecx \n\t" // reverse sign of neg values |
| 4453 | |
| 4454 | "paeth_pba2: \n\t" |
| 4455 | "movl %%ecx, _pbtemp \n\t" // save pb for later use |
| 4456 | // pa = abs(pav) |
| 4457 | "movl _patemp, %%eax \n\t" |
| 4458 | "testl $0x80000000, %%eax \n\t" |
| 4459 | "jz paeth_paa2 \n\t" |
| 4460 | "negl %%eax \n\t" // reverse sign of neg values |
| 4461 | |
| 4462 | "paeth_paa2: \n\t" |
| 4463 | "movl %%eax, _patemp \n\t" // save pa for later use |
| 4464 | // test if pa <= pb |
| 4465 | "cmpl %%ecx, %%eax \n\t" |
| 4466 | "jna paeth_abb2 \n\t" |
| 4467 | // pa > pb; now test if pb <= pc |
| 4468 | "cmpl _pctemp, %%ecx \n\t" |
| 4469 | "jna paeth_bbc2 \n\t" |
| 4470 | // pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp) |
| 4471 | "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl |
| 4472 | "jmp paeth_paeth2 \n\t" |
| 4473 | |
| 4474 | "paeth_bbc2: \n\t" |
| 4475 | // pb <= pc; Raw(x) = Paeth(x) + Prior(x) |
| 4476 | "movb (%%esi,%%ebx,), %%cl \n\t" // load Prior(x) into cl |
| 4477 | "jmp paeth_paeth2 \n\t" |
| 4478 | |
| 4479 | "paeth_abb2: \n\t" |
| 4480 | // pa <= pb; now test if pa <= pc |
| 4481 | "cmpl _pctemp, %%eax \n\t" |
| 4482 | "jna paeth_abc2 \n\t" |
| 4483 | // pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp) |
| 4484 | "movb (%%esi,%%edx,), %%cl \n\t" // load Prior(x-bpp) into cl |
| 4485 | "jmp paeth_paeth2 \n\t" |
| 4486 | |
| 4487 | "paeth_abc2: \n\t" |
| 4488 | // pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp) |
| 4489 | "movb (%%edi,%%edx,), %%cl \n\t" // load Raw(x-bpp) into cl |
| 4490 | |
| 4491 | "paeth_paeth2: \n\t" |
| 4492 | "incl %%ebx \n\t" |
| 4493 | "incl %%edx \n\t" |
| 4494 | // Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256 |
| 4495 | "addb %%cl, -1(%%edi,%%ebx,) \n\t" |
| 4496 | "cmpl _FullLength, %%ebx \n\t" |
| 4497 | "jb paeth_lp2 \n\t" |
| 4498 | |
| 4499 | "paeth_end: \n\t" |
| 4500 | "EMMS \n\t" // end MMX; prep for poss. FP instrs. |
| 4501 | #ifdef __PIC__ |
| 4502 | "popl %%ebx \n\t" // restore index to Global Offset Table |
| 4503 | #endif |
| 4504 | |
| 4505 | : "=c" (dummy_value_c), // output regs (dummy) |
| 4506 | "=S" (dummy_value_S), |
| 4507 | "=D" (dummy_value_D) |
| 4508 | |
| 4509 | : "0" (bpp), // ecx // input regs |
| 4510 | "1" (prev_row), // esi |
| 4511 | "2" (row) // edi |
| 4512 | |
| 4513 | : "%eax", "%edx" // clobber list (no input regs!) |
| 4514 | #ifndef __PIC__ |
| 4515 | , "%ebx" |
| 4516 | #endif |
| 4517 | ); |
| 4518 | |
| 4519 | } /* end png_read_filter_row_mmx_paeth() */ |
| 4520 | #endif |
| 4521 | |
| 4522 | |
| 4523 | |
| 4524 | |
| 4525 | #ifdef PNG_THREAD_UNSAFE_OK |
| 4526 | //===========================================================================// |
| 4527 | // // |
| 4528 | // P N G _ R E A D _ F I L T E R _ R O W _ M M X _ S U B // |
| 4529 | // // |
| 4530 | //===========================================================================// |
| 4531 | |
| 4532 | // Optimized code for PNG Sub filter decoder |
| 4533 | |
| 4534 | static void /* PRIVATE */ |
| 4535 | png_read_filter_row_mmx_sub(png_row_infop row_info, png_bytep row) |
| 4536 | { |
| 4537 | int bpp; |
| 4538 | int dummy_value_a; |
| 4539 | int dummy_value_D; |
| 4540 | |
| 4541 | bpp = (row_info->pixel_depth + 7) >> 3; // calc number of bytes per pixel |
| 4542 | _FullLength = row_info->rowbytes - bpp; // number of bytes to filter |
| 4543 | |
| 4544 | __asm__ __volatile__ ( |
| 4545 | //pre "movl row, %%edi \n\t" |
| 4546 | "movl %%edi, %%esi \n\t" // lp = row |
| 4547 | //pre "movl bpp, %%eax \n\t" |
| 4548 | "addl %%eax, %%edi \n\t" // rp = row + bpp |
| 4549 | //irr "xorl %%eax, %%eax \n\t" |
| 4550 | // get # of bytes to alignment |
| 4551 | "movl %%edi, _dif \n\t" // take start of row |
| 4552 | "addl $0xf, _dif \n\t" // add 7 + 8 to incr past |
| 4553 | // alignment boundary |
| 4554 | "xorl %%ecx, %%ecx \n\t" |
| 4555 | "andl $0xfffffff8, _dif \n\t" // mask to alignment boundary |
| 4556 | "subl %%edi, _dif \n\t" // subtract from start ==> value |
| 4557 | "jz sub_go \n\t" // ecx at alignment |
| 4558 | |
| 4559 | "sub_lp1: \n\t" // fix alignment |
| 4560 | "movb (%%esi,%%ecx,), %%al \n\t" |
| 4561 | "addb %%al, (%%edi,%%ecx,) \n\t" |
| 4562 | "incl %%ecx \n\t" |
| 4563 | "cmpl _dif, %%ecx \n\t" |
| 4564 | "jb sub_lp1 \n\t" |
| 4565 | |
| 4566 | "sub_go: \n\t" |
| 4567 | "movl _FullLength, %%eax \n\t" |
| 4568 | "movl %%eax, %%edx \n\t" |
| 4569 | "subl %%ecx, %%edx \n\t" // subtract alignment fix |
| 4570 | "andl $0x00000007, %%edx \n\t" // calc bytes over mult of 8 |
| 4571 | "subl %%edx, %%eax \n\t" // drop over bytes from length |
| 4572 | "movl %%eax, _MMXLength \n\t" |
| 4573 | |
| 4574 | : "=a" (dummy_value_a), // 0 // output regs (dummy) |
| 4575 | "=D" (dummy_value_D) // 1 |
| 4576 | |
| 4577 | : "0" (bpp), // eax // input regs |
| 4578 | "1" (row) // edi |
| 4579 | |
| 4580 | : "%esi", "%ecx", "%edx" // clobber list |
| 4581 | |
| 4582 | #if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 4583 | , "%mm0", "%mm1", "%mm2", "%mm3" |
| 4584 | , "%mm4", "%mm5", "%mm6", "%mm7" |
| 4585 | #endif |
| 4586 | ); |
| 4587 | |
| 4588 | // now do the math for the rest of the row |
| 4589 | switch (bpp) |
| 4590 | { |
| 4591 | case 3: |
| 4592 | { |
| 4593 | _ActiveMask.use = 0x0000ffffff000000LL; |
| 4594 | _ShiftBpp.use = 24; // == 3 * 8 |
| 4595 | _ShiftRem.use = 40; // == 64 - 24 |
| 4596 | |
| 4597 | __asm__ __volatile__ ( |
| 4598 | // preload "movl row, %%edi \n\t" |
| 4599 | "movq _ActiveMask, %%mm7 \n\t" // load _ActiveMask for 2nd |
| 4600 | // active byte group |
| 4601 | "movl %%edi, %%esi \n\t" // lp = row |
| 4602 | // preload "movl bpp, %%eax \n\t" |
| 4603 | "addl %%eax, %%edi \n\t" // rp = row + bpp |
| 4604 | "movq %%mm7, %%mm6 \n\t" |
| 4605 | "movl _dif, %%edx \n\t" |
| 4606 | "psllq _ShiftBpp, %%mm6 \n\t" // move mask in mm6 to cover |
| 4607 | // 3rd active byte group |
| 4608 | // prime the pump: load the first Raw(x-bpp) data set |
| 4609 | "movq -8(%%edi,%%edx,), %%mm1 \n\t" |
| 4610 | |
| 4611 | "sub_3lp: \n\t" // shift data for adding first |
| 4612 | "psrlq _ShiftRem, %%mm1 \n\t" // bpp bytes (no need for mask; |
| 4613 | // shift clears inactive bytes) |
| 4614 | // add 1st active group |
| 4615 | "movq (%%edi,%%edx,), %%mm0 \n\t" |
| 4616 | "paddb %%mm1, %%mm0 \n\t" |
| 4617 | |
| 4618 | // add 2nd active group |
| 4619 | "movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1 |
| 4620 | "psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly |
| 4621 | "pand %%mm7, %%mm1 \n\t" // mask to use 2nd active group |
| 4622 | "paddb %%mm1, %%mm0 \n\t" |
| 4623 | |
| 4624 | // add 3rd active group |
| 4625 | "movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1 |
| 4626 | "psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly |
| 4627 | "pand %%mm6, %%mm1 \n\t" // mask to use 3rd active group |
| 4628 | "addl $8, %%edx \n\t" |
| 4629 | "paddb %%mm1, %%mm0 \n\t" |
| 4630 | |
| 4631 | "cmpl _MMXLength, %%edx \n\t" |
| 4632 | "movq %%mm0, -8(%%edi,%%edx,) \n\t" // write updated Raws to array |
| 4633 | "movq %%mm0, %%mm1 \n\t" // prep 1st add at top of loop |
| 4634 | "jb sub_3lp \n\t" |
| 4635 | |
| 4636 | : "=a" (dummy_value_a), // 0 // output regs (dummy) |
| 4637 | "=D" (dummy_value_D) // 1 |
| 4638 | |
| 4639 | : "0" (bpp), // eax // input regs |
| 4640 | "1" (row) // edi |
| 4641 | |
| 4642 | : "%edx", "%esi" // clobber list |
| 4643 | #if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 4644 | , "%mm0", "%mm1", "%mm6", "%mm7" |
| 4645 | #endif |
| 4646 | ); |
| 4647 | } |
| 4648 | break; |
| 4649 | |
| 4650 | case 1: |
| 4651 | { |
| 4652 | __asm__ __volatile__ ( |
| 4653 | "movl _dif, %%edx \n\t" |
| 4654 | // preload "movl row, %%edi \n\t" |
| 4655 | "cmpl _FullLength, %%edx \n\t" |
| 4656 | "jnb sub_1end \n\t" |
| 4657 | "movl %%edi, %%esi \n\t" // lp = row |
| 4658 | "xorl %%eax, %%eax \n\t" |
| 4659 | // preload "movl bpp, %%eax \n\t" |
| 4660 | "addl %%eax, %%edi \n\t" // rp = row + bpp |
| 4661 | |
| 4662 | "sub_1lp: \n\t" |
| 4663 | "movb (%%esi,%%edx,), %%al \n\t" |
| 4664 | "addb %%al, (%%edi,%%edx,) \n\t" |
| 4665 | "incl %%edx \n\t" |
| 4666 | "cmpl _FullLength, %%edx \n\t" |
| 4667 | "jb sub_1lp \n\t" |
| 4668 | |
| 4669 | "sub_1end: \n\t" |
| 4670 | |
| 4671 | : "=a" (dummy_value_a), // 0 // output regs (dummy) |
| 4672 | "=D" (dummy_value_D) // 1 |
| 4673 | |
| 4674 | : "0" (bpp), // eax // input regs |
| 4675 | "1" (row) // edi |
| 4676 | |
| 4677 | : "%edx", "%esi" // clobber list |
| 4678 | ); |
| 4679 | } |
| 4680 | return; |
| 4681 | |
| 4682 | case 6: |
| 4683 | case 4: |
| 4684 | //case 7: // GRR BOGUS |
| 4685 | //case 5: // GRR BOGUS |
| 4686 | { |
| 4687 | _ShiftBpp.use = bpp << 3; |
| 4688 | _ShiftRem.use = 64 - _ShiftBpp.use; |
| 4689 | |
| 4690 | __asm__ __volatile__ ( |
| 4691 | // preload "movl row, %%edi \n\t" |
| 4692 | "movl _dif, %%edx \n\t" |
| 4693 | "movl %%edi, %%esi \n\t" // lp = row |
| 4694 | // preload "movl bpp, %%eax \n\t" |
| 4695 | "addl %%eax, %%edi \n\t" // rp = row + bpp |
| 4696 | |
| 4697 | // prime the pump: load the first Raw(x-bpp) data set |
| 4698 | "movq -8(%%edi,%%edx,), %%mm1 \n\t" |
| 4699 | |
| 4700 | "sub_4lp: \n\t" // shift data for adding first |
| 4701 | "psrlq _ShiftRem, %%mm1 \n\t" // bpp bytes (no need for mask; |
| 4702 | // shift clears inactive bytes) |
| 4703 | "movq (%%edi,%%edx,), %%mm0 \n\t" |
| 4704 | "paddb %%mm1, %%mm0 \n\t" |
| 4705 | |
| 4706 | // add 2nd active group |
| 4707 | "movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1 |
| 4708 | "psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly |
| 4709 | "addl $8, %%edx \n\t" |
| 4710 | "paddb %%mm1, %%mm0 \n\t" |
| 4711 | |
| 4712 | "cmpl _MMXLength, %%edx \n\t" |
| 4713 | "movq %%mm0, -8(%%edi,%%edx,) \n\t" |
| 4714 | "movq %%mm0, %%mm1 \n\t" // prep 1st add at top of loop |
| 4715 | "jb sub_4lp \n\t" |
| 4716 | |
| 4717 | : "=a" (dummy_value_a), // 0 // output regs (dummy) |
| 4718 | "=D" (dummy_value_D) // 1 |
| 4719 | |
| 4720 | : "0" (bpp), // eax // input regs |
| 4721 | "1" (row) // edi |
| 4722 | |
| 4723 | : "%edx", "%esi" // clobber list |
| 4724 | #if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 4725 | , "%mm0", "%mm1" |
| 4726 | #endif |
| 4727 | ); |
| 4728 | } |
| 4729 | break; |
| 4730 | |
| 4731 | case 2: |
| 4732 | { |
| 4733 | _ActiveMask.use = 0x00000000ffff0000LL; |
| 4734 | _ShiftBpp.use = 16; // == 2 * 8 |
| 4735 | _ShiftRem.use = 48; // == 64 - 16 |
| 4736 | |
| 4737 | __asm__ __volatile__ ( |
| 4738 | "movq _ActiveMask, %%mm7 \n\t" // load _ActiveMask for 2nd |
| 4739 | // active byte group |
| 4740 | "movl _dif, %%edx \n\t" |
| 4741 | "movq %%mm7, %%mm6 \n\t" |
| 4742 | // preload "movl row, %%edi \n\t" |
| 4743 | "psllq _ShiftBpp, %%mm6 \n\t" // move mask in mm6 to cover |
| 4744 | // 3rd active byte group |
| 4745 | "movl %%edi, %%esi \n\t" // lp = row |
| 4746 | "movq %%mm6, %%mm5 \n\t" |
| 4747 | // preload "movl bpp, %%eax \n\t" |
| 4748 | "addl %%eax, %%edi \n\t" // rp = row + bpp |
| 4749 | "psllq _ShiftBpp, %%mm5 \n\t" // move mask in mm5 to cover |
| 4750 | // 4th active byte group |
| 4751 | // prime the pump: load the first Raw(x-bpp) data set |
| 4752 | "movq -8(%%edi,%%edx,), %%mm1 \n\t" |
| 4753 | |
| 4754 | "sub_2lp: \n\t" // shift data for adding first |
| 4755 | "psrlq _ShiftRem, %%mm1 \n\t" // bpp bytes (no need for mask; |
| 4756 | // shift clears inactive bytes) |
| 4757 | // add 1st active group |
| 4758 | "movq (%%edi,%%edx,), %%mm0 \n\t" |
| 4759 | "paddb %%mm1, %%mm0 \n\t" |
| 4760 | |
| 4761 | // add 2nd active group |
| 4762 | "movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1 |
| 4763 | "psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly |
| 4764 | "pand %%mm7, %%mm1 \n\t" // mask to use 2nd active group |
| 4765 | "paddb %%mm1, %%mm0 \n\t" |
| 4766 | |
| 4767 | // add 3rd active group |
| 4768 | "movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1 |
| 4769 | "psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly |
| 4770 | "pand %%mm6, %%mm1 \n\t" // mask to use 3rd active group |
| 4771 | "paddb %%mm1, %%mm0 \n\t" |
| 4772 | |
| 4773 | // add 4th active group |
| 4774 | "movq %%mm0, %%mm1 \n\t" // mov updated Raws to mm1 |
| 4775 | "psllq _ShiftBpp, %%mm1 \n\t" // shift data to pos. correctly |
| 4776 | "pand %%mm5, %%mm1 \n\t" // mask to use 4th active group |
| 4777 | "addl $8, %%edx \n\t" |
| 4778 | "paddb %%mm1, %%mm0 \n\t" |
| 4779 | "cmpl _MMXLength, %%edx \n\t" |
| 4780 | "movq %%mm0, -8(%%edi,%%edx,) \n\t" // write updated Raws to array |
| 4781 | "movq %%mm0, %%mm1 \n\t" // prep 1st add at top of loop |
| 4782 | "jb sub_2lp \n\t" |
| 4783 | |
| 4784 | : "=a" (dummy_value_a), // 0 // output regs (dummy) |
| 4785 | "=D" (dummy_value_D) // 1 |
| 4786 | |
| 4787 | : "0" (bpp), // eax // input regs |
| 4788 | "1" (row) // edi |
| 4789 | |
| 4790 | : "%edx", "%esi" // clobber list |
| 4791 | #if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 4792 | , "%mm0", "%mm1", "%mm5", "%mm6", "%mm7" |
| 4793 | #endif |
| 4794 | ); |
| 4795 | } |
| 4796 | break; |
| 4797 | |
| 4798 | case 8: |
| 4799 | { |
| 4800 | __asm__ __volatile__ ( |
| 4801 | // preload "movl row, %%edi \n\t" |
| 4802 | "movl _dif, %%edx \n\t" |
| 4803 | "movl %%edi, %%esi \n\t" // lp = row |
| 4804 | // preload "movl bpp, %%eax \n\t" |
| 4805 | "addl %%eax, %%edi \n\t" // rp = row + bpp |
| 4806 | "movl _MMXLength, %%ecx \n\t" |
| 4807 | |
| 4808 | // prime the pump: load the first Raw(x-bpp) data set |
| 4809 | "movq -8(%%edi,%%edx,), %%mm7 \n\t" |
| 4810 | "andl $0x0000003f, %%ecx \n\t" // calc bytes over mult of 64 |
| 4811 | |
| 4812 | "sub_8lp: \n\t" |
| 4813 | "movq (%%edi,%%edx,), %%mm0 \n\t" // load Sub(x) for 1st 8 bytes |
| 4814 | "paddb %%mm7, %%mm0 \n\t" |
| 4815 | "movq 8(%%edi,%%edx,), %%mm1 \n\t" // load Sub(x) for 2nd 8 bytes |
| 4816 | "movq %%mm0, (%%edi,%%edx,) \n\t" // write Raw(x) for 1st 8 bytes |
| 4817 | |
| 4818 | // Now mm0 will be used as Raw(x-bpp) for the 2nd group of 8 bytes. |
| 4819 | // This will be repeated for each group of 8 bytes with the 8th |
| 4820 | // group being used as the Raw(x-bpp) for the 1st group of the |
| 4821 | // next loop. |
| 4822 | |
| 4823 | "paddb %%mm0, %%mm1 \n\t" |
| 4824 | "movq 16(%%edi,%%edx,), %%mm2 \n\t" // load Sub(x) for 3rd 8 bytes |
| 4825 | "movq %%mm1, 8(%%edi,%%edx,) \n\t" // write Raw(x) for 2nd 8 bytes |
| 4826 | "paddb %%mm1, %%mm2 \n\t" |
| 4827 | "movq 24(%%edi,%%edx,), %%mm3 \n\t" // load Sub(x) for 4th 8 bytes |
| 4828 | "movq %%mm2, 16(%%edi,%%edx,) \n\t" // write Raw(x) for 3rd 8 bytes |
| 4829 | "paddb %%mm2, %%mm3 \n\t" |
| 4830 | "movq 32(%%edi,%%edx,), %%mm4 \n\t" // load Sub(x) for 5th 8 bytes |
| 4831 | "movq %%mm3, 24(%%edi,%%edx,) \n\t" // write Raw(x) for 4th 8 bytes |
| 4832 | "paddb %%mm3, %%mm4 \n\t" |
| 4833 | "movq 40(%%edi,%%edx,), %%mm5 \n\t" // load Sub(x) for 6th 8 bytes |
| 4834 | "movq %%mm4, 32(%%edi,%%edx,) \n\t" // write Raw(x) for 5th 8 bytes |
| 4835 | "paddb %%mm4, %%mm5 \n\t" |
| 4836 | "movq 48(%%edi,%%edx,), %%mm6 \n\t" // load Sub(x) for 7th 8 bytes |
| 4837 | "movq %%mm5, 40(%%edi,%%edx,) \n\t" // write Raw(x) for 6th 8 bytes |
| 4838 | "paddb %%mm5, %%mm6 \n\t" |
| 4839 | "movq 56(%%edi,%%edx,), %%mm7 \n\t" // load Sub(x) for 8th 8 bytes |
| 4840 | "movq %%mm6, 48(%%edi,%%edx,) \n\t" // write Raw(x) for 7th 8 bytes |
| 4841 | "addl $64, %%edx \n\t" |
| 4842 | "paddb %%mm6, %%mm7 \n\t" |
| 4843 | "cmpl %%ecx, %%edx \n\t" |
| 4844 | "movq %%mm7, -8(%%edi,%%edx,) \n\t" // write Raw(x) for 8th 8 bytes |
| 4845 | "jb sub_8lp \n\t" |
| 4846 | |
| 4847 | "cmpl _MMXLength, %%edx \n\t" |
| 4848 | "jnb sub_8lt8 \n\t" |
| 4849 | |
| 4850 | "sub_8lpA: \n\t" |
| 4851 | "movq (%%edi,%%edx,), %%mm0 \n\t" |
| 4852 | "addl $8, %%edx \n\t" |
| 4853 | "paddb %%mm7, %%mm0 \n\t" |
| 4854 | "cmpl _MMXLength, %%edx \n\t" |
| 4855 | "movq %%mm0, -8(%%edi,%%edx,) \n\t" // -8 to offset early addl edx |
| 4856 | "movq %%mm0, %%mm7 \n\t" // move calculated Raw(x) data |
| 4857 | // to mm1 to be new Raw(x-bpp) |
| 4858 | // for next loop |
| 4859 | "jb sub_8lpA \n\t" |
| 4860 | |
| 4861 | "sub_8lt8: \n\t" |
| 4862 | |
| 4863 | : "=a" (dummy_value_a), // 0 // output regs (dummy) |
| 4864 | "=D" (dummy_value_D) // 1 |
| 4865 | |
| 4866 | : "0" (bpp), // eax // input regs |
| 4867 | "1" (row) // edi |
| 4868 | |
| 4869 | : "%ecx", "%edx", "%esi" // clobber list |
| 4870 | #if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 4871 | , "%mm0", "%mm1", "%mm2", "%mm3", "%mm4", "%mm5", "%mm6", "%mm7" |
| 4872 | #endif |
| 4873 | ); |
| 4874 | } |
| 4875 | break; |
| 4876 | |
| 4877 | default: // bpp greater than 8 bytes GRR BOGUS |
| 4878 | { |
| 4879 | __asm__ __volatile__ ( |
| 4880 | "movl _dif, %%edx \n\t" |
| 4881 | // preload "movl row, %%edi \n\t" |
| 4882 | "movl %%edi, %%esi \n\t" // lp = row |
| 4883 | // preload "movl bpp, %%eax \n\t" |
| 4884 | "addl %%eax, %%edi \n\t" // rp = row + bpp |
| 4885 | |
| 4886 | "sub_Alp: \n\t" |
| 4887 | "movq (%%edi,%%edx,), %%mm0 \n\t" |
| 4888 | "movq (%%esi,%%edx,), %%mm1 \n\t" |
| 4889 | "addl $8, %%edx \n\t" |
| 4890 | "paddb %%mm1, %%mm0 \n\t" |
| 4891 | "cmpl _MMXLength, %%edx \n\t" |
| 4892 | "movq %%mm0, -8(%%edi,%%edx,) \n\t" // mov does not affect flags; |
| 4893 | // -8 to offset addl edx |
| 4894 | "jb sub_Alp \n\t" |
| 4895 | |
| 4896 | : "=a" (dummy_value_a), // 0 // output regs (dummy) |
| 4897 | "=D" (dummy_value_D) // 1 |
| 4898 | |
| 4899 | : "0" (bpp), // eax // input regs |
| 4900 | "1" (row) // edi |
| 4901 | |
| 4902 | : "%edx", "%esi" // clobber list |
| 4903 | #if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 4904 | , "%mm0", "%mm1" |
| 4905 | #endif |
| 4906 | ); |
| 4907 | } |
| 4908 | break; |
| 4909 | |
| 4910 | } // end switch (bpp) |
| 4911 | |
| 4912 | __asm__ __volatile__ ( |
| 4913 | "movl _MMXLength, %%edx \n\t" |
| 4914 | //pre "movl row, %%edi \n\t" |
| 4915 | "cmpl _FullLength, %%edx \n\t" |
| 4916 | "jnb sub_end \n\t" |
| 4917 | |
| 4918 | "movl %%edi, %%esi \n\t" // lp = row |
| 4919 | //pre "movl bpp, %%eax \n\t" |
| 4920 | "addl %%eax, %%edi \n\t" // rp = row + bpp |
| 4921 | "xorl %%eax, %%eax \n\t" |
| 4922 | |
| 4923 | "sub_lp2: \n\t" |
| 4924 | "movb (%%esi,%%edx,), %%al \n\t" |
| 4925 | "addb %%al, (%%edi,%%edx,) \n\t" |
| 4926 | "incl %%edx \n\t" |
| 4927 | "cmpl _FullLength, %%edx \n\t" |
| 4928 | "jb sub_lp2 \n\t" |
| 4929 | |
| 4930 | "sub_end: \n\t" |
| 4931 | "EMMS \n\t" // end MMX instructions |
| 4932 | |
| 4933 | : "=a" (dummy_value_a), // 0 // output regs (dummy) |
| 4934 | "=D" (dummy_value_D) // 1 |
| 4935 | |
| 4936 | : "0" (bpp), // eax // input regs |
| 4937 | "1" (row) // edi |
| 4938 | |
| 4939 | : "%edx", "%esi" // clobber list |
| 4940 | ); |
| 4941 | |
| 4942 | } // end of png_read_filter_row_mmx_sub() |
| 4943 | #endif |
| 4944 | |
| 4945 | |
| 4946 | |
| 4947 | |
| 4948 | //===========================================================================// |
| 4949 | // // |
| 4950 | // P N G _ R E A D _ F I L T E R _ R O W _ M M X _ U P // |
| 4951 | // // |
| 4952 | //===========================================================================// |
| 4953 | |
| 4954 | // Optimized code for PNG Up filter decoder |
| 4955 | |
| 4956 | static void /* PRIVATE */ |
| 4957 | png_read_filter_row_mmx_up(png_row_infop row_info, png_bytep row, |
| 4958 | png_bytep prev_row) |
| 4959 | { |
| 4960 | png_uint_32 len; |
| 4961 | int dummy_value_d; // fix 'forbidden register 3 (dx) was spilled' error |
| 4962 | int dummy_value_S; |
| 4963 | int dummy_value_D; |
| 4964 | |
| 4965 | len = row_info->rowbytes; // number of bytes to filter |
| 4966 | |
| 4967 | __asm__ __volatile__ ( |
| 4968 | //pre "movl row, %%edi \n\t" |
| 4969 | // get # of bytes to alignment |
| 4970 | #ifdef __PIC__ |
| 4971 | "pushl %%ebx \n\t" |
| 4972 | #endif |
| 4973 | "movl %%edi, %%ecx \n\t" |
| 4974 | "xorl %%ebx, %%ebx \n\t" |
| 4975 | "addl $0x7, %%ecx \n\t" |
| 4976 | "xorl %%eax, %%eax \n\t" |
| 4977 | "andl $0xfffffff8, %%ecx \n\t" |
| 4978 | //pre "movl prev_row, %%esi \n\t" |
| 4979 | "subl %%edi, %%ecx \n\t" |
| 4980 | "jz up_go \n\t" |
| 4981 | |
| 4982 | "up_lp1: \n\t" // fix alignment |
| 4983 | "movb (%%edi,%%ebx,), %%al \n\t" |
| 4984 | "addb (%%esi,%%ebx,), %%al \n\t" |
| 4985 | "incl %%ebx \n\t" |
| 4986 | "cmpl %%ecx, %%ebx \n\t" |
| 4987 | "movb %%al, -1(%%edi,%%ebx,) \n\t" // mov does not affect flags; -1 to |
| 4988 | "jb up_lp1 \n\t" // offset incl ebx |
| 4989 | |
| 4990 | "up_go: \n\t" |
| 4991 | //pre "movl len, %%edx \n\t" |
| 4992 | "movl %%edx, %%ecx \n\t" |
| 4993 | "subl %%ebx, %%edx \n\t" // subtract alignment fix |
| 4994 | "andl $0x0000003f, %%edx \n\t" // calc bytes over mult of 64 |
| 4995 | "subl %%edx, %%ecx \n\t" // drop over bytes from length |
| 4996 | |
| 4997 | // unrolled loop - use all MMX registers and interleave to reduce |
| 4998 | // number of branch instructions (loops) and reduce partial stalls |
| 4999 | "up_loop: \n\t" |
| 5000 | "movq (%%esi,%%ebx,), %%mm1 \n\t" |
| 5001 | "movq (%%edi,%%ebx,), %%mm0 \n\t" |
| 5002 | "movq 8(%%esi,%%ebx,), %%mm3 \n\t" |
| 5003 | "paddb %%mm1, %%mm0 \n\t" |
| 5004 | "movq 8(%%edi,%%ebx,), %%mm2 \n\t" |
| 5005 | "movq %%mm0, (%%edi,%%ebx,) \n\t" |
| 5006 | "paddb %%mm3, %%mm2 \n\t" |
| 5007 | "movq 16(%%esi,%%ebx,), %%mm5 \n\t" |
| 5008 | "movq %%mm2, 8(%%edi,%%ebx,) \n\t" |
| 5009 | "movq 16(%%edi,%%ebx,), %%mm4 \n\t" |
| 5010 | "movq 24(%%esi,%%ebx,), %%mm7 \n\t" |
| 5011 | "paddb %%mm5, %%mm4 \n\t" |
| 5012 | "movq 24(%%edi,%%ebx,), %%mm6 \n\t" |
| 5013 | "movq %%mm4, 16(%%edi,%%ebx,) \n\t" |
| 5014 | "paddb %%mm7, %%mm6 \n\t" |
| 5015 | "movq 32(%%esi,%%ebx,), %%mm1 \n\t" |
| 5016 | "movq %%mm6, 24(%%edi,%%ebx,) \n\t" |
| 5017 | "movq 32(%%edi,%%ebx,), %%mm0 \n\t" |
| 5018 | "movq 40(%%esi,%%ebx,), %%mm3 \n\t" |
| 5019 | "paddb %%mm1, %%mm0 \n\t" |
| 5020 | "movq 40(%%edi,%%ebx,), %%mm2 \n\t" |
| 5021 | "movq %%mm0, 32(%%edi,%%ebx,) \n\t" |
| 5022 | "paddb %%mm3, %%mm2 \n\t" |
| 5023 | "movq 48(%%esi,%%ebx,), %%mm5 \n\t" |
| 5024 | "movq %%mm2, 40(%%edi,%%ebx,) \n\t" |
| 5025 | "movq 48(%%edi,%%ebx,), %%mm4 \n\t" |
| 5026 | "movq 56(%%esi,%%ebx,), %%mm7 \n\t" |
| 5027 | "paddb %%mm5, %%mm4 \n\t" |
| 5028 | "movq 56(%%edi,%%ebx,), %%mm6 \n\t" |
| 5029 | "movq %%mm4, 48(%%edi,%%ebx,) \n\t" |
| 5030 | "addl $64, %%ebx \n\t" |
| 5031 | "paddb %%mm7, %%mm6 \n\t" |
| 5032 | "cmpl %%ecx, %%ebx \n\t" |
| 5033 | "movq %%mm6, -8(%%edi,%%ebx,) \n\t" // (+56)movq does not affect flags; |
| 5034 | "jb up_loop \n\t" // -8 to offset addl ebx |
| 5035 | |
| 5036 | "cmpl $0, %%edx \n\t" // test for bytes over mult of 64 |
| 5037 | "jz up_end \n\t" |
| 5038 | |
| 5039 | "cmpl $8, %%edx \n\t" // test for less than 8 bytes |
| 5040 | "jb up_lt8 \n\t" // [added by lcreeve at netins.net] |
| 5041 | |
| 5042 | "addl %%edx, %%ecx \n\t" |
| 5043 | "andl $0x00000007, %%edx \n\t" // calc bytes over mult of 8 |
| 5044 | "subl %%edx, %%ecx \n\t" // drop over bytes from length |
| 5045 | "jz up_lt8 \n\t" |
| 5046 | |
| 5047 | "up_lpA: \n\t" // use MMX regs to update 8 bytes sim. |
| 5048 | "movq (%%esi,%%ebx,), %%mm1 \n\t" |
| 5049 | "movq (%%edi,%%ebx,), %%mm0 \n\t" |
| 5050 | "addl $8, %%ebx \n\t" |
| 5051 | "paddb %%mm1, %%mm0 \n\t" |
| 5052 | "cmpl %%ecx, %%ebx \n\t" |
| 5053 | "movq %%mm0, -8(%%edi,%%ebx,) \n\t" // movq does not affect flags; -8 to |
| 5054 | "jb up_lpA \n\t" // offset add ebx |
| 5055 | "cmpl $0, %%edx \n\t" // test for bytes over mult of 8 |
| 5056 | "jz up_end \n\t" |
| 5057 | |
| 5058 | "up_lt8: \n\t" |
| 5059 | "xorl %%eax, %%eax \n\t" |
| 5060 | "addl %%edx, %%ecx \n\t" // move over byte count into counter |
| 5061 | |
| 5062 | "up_lp2: \n\t" // use x86 regs for remaining bytes |
| 5063 | "movb (%%edi,%%ebx,), %%al \n\t" |
| 5064 | "addb (%%esi,%%ebx,), %%al \n\t" |
| 5065 | "incl %%ebx \n\t" |
| 5066 | "cmpl %%ecx, %%ebx \n\t" |
| 5067 | "movb %%al, -1(%%edi,%%ebx,) \n\t" // mov does not affect flags; -1 to |
| 5068 | "jb up_lp2 \n\t" // offset inc ebx |
| 5069 | |
| 5070 | "up_end: \n\t" |
| 5071 | "EMMS \n\t" // conversion of filtered row complete |
| 5072 | #ifdef __PIC__ |
| 5073 | "popl %%ebx \n\t" |
| 5074 | #endif |
| 5075 | |
| 5076 | : "=d" (dummy_value_d), // 0 // output regs (dummy) |
| 5077 | "=S" (dummy_value_S), // 1 |
| 5078 | "=D" (dummy_value_D) // 2 |
| 5079 | |
| 5080 | : "0" (len), // edx // input regs |
| 5081 | "1" (prev_row), // esi |
| 5082 | "2" (row) // edi |
| 5083 | |
| 5084 | : "%eax", "%ecx" // clobber list (no input regs!) |
| 5085 | #ifndef __PIC__ |
| 5086 | , "%ebx" |
| 5087 | #endif |
| 5088 | |
| 5089 | #if 0 /* MMX regs (%mm0, etc.) not supported by gcc 2.7.2.3 or egcs 1.1 */ |
| 5090 | , "%mm0", "%mm1", "%mm2", "%mm3" |
| 5091 | , "%mm4", "%mm5", "%mm6", "%mm7" |
| 5092 | #endif |
| 5093 | ); |
| 5094 | |
| 5095 | } // end of png_read_filter_row_mmx_up() |
| 5096 | |
| 5097 | #endif /* PNG_MMX_CODE_SUPPORTED */ |
| 5098 | |
| 5099 | |
| 5100 | |
| 5101 | |
| 5102 | /*===========================================================================*/ |
| 5103 | /* */ |
| 5104 | /* P N G _ R E A D _ F I L T E R _ R O W */ |
| 5105 | /* */ |
| 5106 | /*===========================================================================*/ |
| 5107 | |
| 5108 | |
| 5109 | /* Optimized png_read_filter_row routines */ |
| 5110 | |
| 5111 | void /* PRIVATE */ |
| 5112 | png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep |
| 5113 | row, png_bytep prev_row, int filter) |
| 5114 | { |
| 5115 | #ifdef PNG_DEBUG |
| 5116 | char filnm[10]; |
| 5117 | #endif |
| 5118 | |
| 5119 | #if defined(PNG_MMX_CODE_SUPPORTED) |
| 5120 | /* GRR: these are superseded by png_ptr->asm_flags: */ |
| 5121 | #define UseMMX_sub 1 // GRR: converted 20000730 |
| 5122 | #define UseMMX_up 1 // GRR: converted 20000729 |
| 5123 | #define UseMMX_avg 1 // GRR: converted 20000828 (+ 16-bit bugfix 20000916) |
| 5124 | #define UseMMX_paeth 1 // GRR: converted 20000828 |
| 5125 | |
| 5126 | if (_mmx_supported == 2) { |
| 5127 | /* this should have happened in png_init_mmx_flags() already */ |
| 5128 | #if !defined(PNG_1_0_X) |
| 5129 | png_warning(png_ptr, "asm_flags may not have been initialized"); |
| 5130 | #endif |
| 5131 | png_mmx_support(); |
| 5132 | } |
| 5133 | #endif /* PNG_MMX_CODE_SUPPORTED */ |
| 5134 | |
| 5135 | #ifdef PNG_DEBUG |
| 5136 | png_debug(1, "in png_read_filter_row (pnggccrd.c)\n"); |
| 5137 | switch (filter) |
| 5138 | { |
| 5139 | case 0: sprintf(filnm, "none"); |
| 5140 | break; |
| 5141 | case 1: sprintf(filnm, "sub-%s", |
| 5142 | #if defined(PNG_MMX_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK) |
| 5143 | #if !defined(PNG_1_0_X) |
| 5144 | (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_SUB)? "MMX" : |
| 5145 | #endif |
| 5146 | #endif |
| 5147 | "x86"); |
| 5148 | break; |
| 5149 | case 2: sprintf(filnm, "up-%s", |
| 5150 | #ifdef PNG_MMX_CODE_SUPPORTED |
| 5151 | #if !defined(PNG_1_0_X) |
| 5152 | (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_UP)? "MMX" : |
| 5153 | #endif |
| 5154 | #endif |
| 5155 | "x86"); |
| 5156 | break; |
| 5157 | case 3: sprintf(filnm, "avg-%s", |
| 5158 | #if defined(PNG_MMX_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK) |
| 5159 | #if !defined(PNG_1_0_X) |
| 5160 | (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_AVG)? "MMX" : |
| 5161 | #endif |
| 5162 | #endif |
| 5163 | "x86"); |
| 5164 | break; |
| 5165 | case 4: sprintf(filnm, "Paeth-%s", |
| 5166 | #if defined(PNG_MMX_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK) |
| 5167 | #if !defined(PNG_1_0_X) |
| 5168 | (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH)? "MMX": |
| 5169 | #endif |
| 5170 | #endif |
| 5171 | "x86"); |
| 5172 | break; |
| 5173 | default: sprintf(filnm, "unknw"); |
| 5174 | break; |
| 5175 | } |
| 5176 | png_debug2(0, "row_number=%5ld, %5s, ", png_ptr->row_number, filnm); |
| 5177 | png_debug1(0, "row=0x%08lx, ", (unsigned long)row); |
| 5178 | png_debug2(0, "pixdepth=%2d, bytes=%d, ", (int)row_info->pixel_depth, |
| 5179 | (int)((row_info->pixel_depth + 7) >> 3)); |
| 5180 | png_debug1(0,"rowbytes=%8ld\n", row_info->rowbytes); |
| 5181 | #endif /* PNG_DEBUG */ |
| 5182 | |
| 5183 | switch (filter) |
| 5184 | { |
| 5185 | case PNG_FILTER_VALUE_NONE: |
| 5186 | break; |
| 5187 | |
| 5188 | case PNG_FILTER_VALUE_SUB: |
| 5189 | #if defined(PNG_MMX_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK) |
| 5190 | #if !defined(PNG_1_0_X) |
| 5191 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_SUB) && |
| 5192 | (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) && |
| 5193 | (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold)) |
| 5194 | #else |
| 5195 | if (_mmx_supported) |
| 5196 | #endif |
| 5197 | { |
| 5198 | png_read_filter_row_mmx_sub(row_info, row); |
| 5199 | } |
| 5200 | else |
| 5201 | #endif /* PNG_MMX_CODE_SUPPORTED */ |
| 5202 | { |
| 5203 | png_uint_32 i; |
| 5204 | png_uint_32 istop = row_info->rowbytes; |
| 5205 | png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3; |
| 5206 | png_bytep rp = row + bpp; |
| 5207 | png_bytep lp = row; |
| 5208 | |
| 5209 | for (i = bpp; i < istop; i++) |
| 5210 | { |
| 5211 | *rp = (png_byte)(((int)(*rp) + (int)(*lp++)) & 0xff); |
| 5212 | rp++; |
| 5213 | } |
| 5214 | } /* end !UseMMX_sub */ |
| 5215 | break; |
| 5216 | |
| 5217 | case PNG_FILTER_VALUE_UP: |
| 5218 | #if defined(PNG_MMX_CODE_SUPPORTED) |
| 5219 | #if !defined(PNG_1_0_X) |
| 5220 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_UP) && |
| 5221 | (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) && |
| 5222 | (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold)) |
| 5223 | #else |
| 5224 | if (_mmx_supported) |
| 5225 | #endif |
| 5226 | { |
| 5227 | png_read_filter_row_mmx_up(row_info, row, prev_row); |
| 5228 | } |
| 5229 | else |
| 5230 | #endif /* PNG_MMX_CODE_SUPPORTED */ |
| 5231 | { |
| 5232 | png_uint_32 i; |
| 5233 | png_uint_32 istop = row_info->rowbytes; |
| 5234 | png_bytep rp = row; |
| 5235 | png_bytep pp = prev_row; |
| 5236 | |
| 5237 | for (i = 0; i < istop; ++i) |
| 5238 | { |
| 5239 | *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff); |
| 5240 | rp++; |
| 5241 | } |
| 5242 | } /* end !UseMMX_up */ |
| 5243 | break; |
| 5244 | |
| 5245 | case PNG_FILTER_VALUE_AVG: |
| 5246 | #if defined(PNG_MMX_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK) |
| 5247 | #if !defined(PNG_1_0_X) |
| 5248 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_AVG) && |
| 5249 | (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) && |
| 5250 | (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold)) |
| 5251 | #else |
| 5252 | if (_mmx_supported) |
| 5253 | #endif |
| 5254 | { |
| 5255 | png_read_filter_row_mmx_avg(row_info, row, prev_row); |
| 5256 | } |
| 5257 | else |
| 5258 | #endif /* PNG_MMX_CODE_SUPPORTED */ |
| 5259 | { |
| 5260 | png_uint_32 i; |
| 5261 | png_bytep rp = row; |
| 5262 | png_bytep pp = prev_row; |
| 5263 | png_bytep lp = row; |
| 5264 | png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3; |
| 5265 | png_uint_32 istop = row_info->rowbytes - bpp; |
| 5266 | |
| 5267 | for (i = 0; i < bpp; i++) |
| 5268 | { |
| 5269 | *rp = (png_byte)(((int)(*rp) + |
| 5270 | ((int)(*pp++) >> 1)) & 0xff); |
| 5271 | rp++; |
| 5272 | } |
| 5273 | |
| 5274 | for (i = 0; i < istop; i++) |
| 5275 | { |
| 5276 | *rp = (png_byte)(((int)(*rp) + |
| 5277 | ((int)(*pp++ + *lp++) >> 1)) & 0xff); |
| 5278 | rp++; |
| 5279 | } |
| 5280 | } /* end !UseMMX_avg */ |
| 5281 | break; |
| 5282 | |
| 5283 | case PNG_FILTER_VALUE_PAETH: |
| 5284 | #if defined(PNG_MMX_CODE_SUPPORTED) && defined(PNG_THREAD_UNSAFE_OK) |
| 5285 | #if !defined(PNG_1_0_X) |
| 5286 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH) && |
| 5287 | (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) && |
| 5288 | (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold)) |
| 5289 | #else |
| 5290 | if (_mmx_supported) |
| 5291 | #endif |
| 5292 | { |
| 5293 | png_read_filter_row_mmx_paeth(row_info, row, prev_row); |
| 5294 | } |
| 5295 | else |
| 5296 | #endif /* PNG_MMX_CODE_SUPPORTED */ |
| 5297 | { |
| 5298 | png_uint_32 i; |
| 5299 | png_bytep rp = row; |
| 5300 | png_bytep pp = prev_row; |
| 5301 | png_bytep lp = row; |
| 5302 | png_bytep cp = prev_row; |
| 5303 | png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3; |
| 5304 | png_uint_32 istop = row_info->rowbytes - bpp; |
| 5305 | |
| 5306 | for (i = 0; i < bpp; i++) |
| 5307 | { |
| 5308 | *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff); |
| 5309 | rp++; |
| 5310 | } |
| 5311 | |
| 5312 | for (i = 0; i < istop; i++) /* use leftover rp,pp */ |
| 5313 | { |
| 5314 | int a, b, c, pa, pb, pc, p; |
| 5315 | |
| 5316 | a = *lp++; |
| 5317 | b = *pp++; |
| 5318 | c = *cp++; |
| 5319 | |
| 5320 | p = b - c; |
| 5321 | pc = a - c; |
| 5322 | |
| 5323 | #ifdef PNG_USE_ABS |
| 5324 | pa = abs(p); |
| 5325 | pb = abs(pc); |
| 5326 | pc = abs(p + pc); |
| 5327 | #else |
| 5328 | pa = p < 0 ? -p : p; |
| 5329 | pb = pc < 0 ? -pc : pc; |
| 5330 | pc = (p + pc) < 0 ? -(p + pc) : p + pc; |
| 5331 | #endif |
| 5332 | |
| 5333 | /* |
| 5334 | if (pa <= pb && pa <= pc) |
| 5335 | p = a; |
| 5336 | else if (pb <= pc) |
| 5337 | p = b; |
| 5338 | else |
| 5339 | p = c; |
| 5340 | */ |
| 5341 | |
| 5342 | p = (pa <= pb && pa <= pc) ? a : (pb <= pc) ? b : c; |
| 5343 | |
| 5344 | *rp = (png_byte)(((int)(*rp) + p) & 0xff); |
| 5345 | rp++; |
| 5346 | } |
| 5347 | } /* end !UseMMX_paeth */ |
| 5348 | break; |
| 5349 | |
| 5350 | default: |
| 5351 | png_warning(png_ptr, "Ignoring bad row-filter type"); |
| 5352 | *row=0; |
| 5353 | break; |
| 5354 | } |
| 5355 | } |
| 5356 | |
| 5357 | #endif /* PNG_HAVE_MMX_READ_FILTER_ROW */ |
| 5358 | |
| 5359 | |
| 5360 | /*===========================================================================*/ |
| 5361 | /* */ |
| 5362 | /* P N G _ M M X _ S U P P O R T */ |
| 5363 | /* */ |
| 5364 | /*===========================================================================*/ |
| 5365 | |
| 5366 | /* GRR NOTES: (1) the following code assumes 386 or better (pushfl/popfl) |
| 5367 | * (2) all instructions compile with gcc 2.7.2.3 and later |
| 5368 | * (3) the function is moved down here to prevent gcc from |
| 5369 | * inlining it in multiple places and then barfing be- |
| 5370 | * cause the ".NOT_SUPPORTED" label is multiply defined |
| 5371 | * [is there a way to signal that a *single* function should |
| 5372 | * not be inlined? is there a way to modify the label for |
| 5373 | * each inlined instance, e.g., by appending _1, _2, etc.? |
| 5374 | * maybe if don't use leading "." in label name? (nope...sigh)] |
| 5375 | */ |
| 5376 | |
| 5377 | int PNGAPI |
| 5378 | png_mmx_support(void) |
| 5379 | { |
| 5380 | #if defined(PNG_MMX_CODE_SUPPORTED) |
| 5381 | int result; |
| 5382 | __asm__ __volatile__ ( |
| 5383 | "pushl %%ebx \n\t" // ebx gets clobbered by CPUID instruction |
| 5384 | "pushl %%ecx \n\t" // so does ecx... |
| 5385 | "pushl %%edx \n\t" // ...and edx (but ecx & edx safe on Linux) |
| 5386 | // ".byte 0x66 \n\t" // convert 16-bit pushf to 32-bit pushfd |
| 5387 | // "pushf \n\t" // 16-bit pushf |
| 5388 | "pushfl \n\t" // save Eflag to stack |
| 5389 | "popl %%eax \n\t" // get Eflag from stack into eax |
| 5390 | "movl %%eax, %%ecx \n\t" // make another copy of Eflag in ecx |
| 5391 | "xorl $0x200000, %%eax \n\t" // toggle ID bit in Eflag (i.e., bit 21) |
| 5392 | "pushl %%eax \n\t" // save modified Eflag back to stack |
| 5393 | // ".byte 0x66 \n\t" // convert 16-bit popf to 32-bit popfd |
| 5394 | // "popf \n\t" // 16-bit popf |
| 5395 | "popfl \n\t" // restore modified value to Eflag reg |
| 5396 | "pushfl \n\t" // save Eflag to stack |
| 5397 | "popl %%eax \n\t" // get Eflag from stack |
| 5398 | "pushl %%ecx \n\t" // save original Eflag to stack |
| 5399 | "popfl \n\t" // restore original Eflag |
| 5400 | "xorl %%ecx, %%eax \n\t" // compare new Eflag with original Eflag |
| 5401 | "jz 0f \n\t" // if same, CPUID instr. is not supported |
| 5402 | |
| 5403 | "xorl %%eax, %%eax \n\t" // set eax to zero |
| 5404 | // ".byte 0x0f, 0xa2 \n\t" // CPUID instruction (two-byte opcode) |
| 5405 | "cpuid \n\t" // get the CPU identification info |
| 5406 | "cmpl $1, %%eax \n\t" // make sure eax return non-zero value |
| 5407 | "jl 0f \n\t" // if eax is zero, MMX is not supported |
| 5408 | |
| 5409 | "xorl %%eax, %%eax \n\t" // set eax to zero and... |
| 5410 | "incl %%eax \n\t" // ...increment eax to 1. This pair is |
| 5411 | // faster than the instruction "mov eax, 1" |
| 5412 | "cpuid \n\t" // get the CPU identification info again |
| 5413 | "andl $0x800000, %%edx \n\t" // mask out all bits but MMX bit (23) |
| 5414 | "cmpl $0, %%edx \n\t" // 0 = MMX not supported |
| 5415 | "jz 0f \n\t" // non-zero = yes, MMX IS supported |
| 5416 | |
| 5417 | "movl $1, %%eax \n\t" // set return value to 1 |
| 5418 | "jmp 1f \n\t" // DONE: have MMX support |
| 5419 | |
| 5420 | "0: \n\t" // .NOT_SUPPORTED: target label for jump instructions |
| 5421 | "movl $0, %%eax \n\t" // set return value to 0 |
| 5422 | "1: \n\t" // .RETURN: target label for jump instructions |
| 5423 | "popl %%edx \n\t" // restore edx |
| 5424 | "popl %%ecx \n\t" // restore ecx |
| 5425 | "popl %%ebx \n\t" // restore ebx |
| 5426 | |
| 5427 | // "ret \n\t" // DONE: no MMX support |
| 5428 | // (fall through to standard C "ret") |
| 5429 | |
| 5430 | : "=a" (result) // output list |
| 5431 | |
| 5432 | : // any variables used on input (none) |
| 5433 | |
| 5434 | // no clobber list |
| 5435 | // , "%ebx", "%ecx", "%edx" // GRR: we handle these manually |
| 5436 | // , "memory" // if write to a variable gcc thought was in a reg |
| 5437 | // , "cc" // "condition codes" (flag bits) |
| 5438 | ); |
| 5439 | _mmx_supported = result; |
| 5440 | #else |
| 5441 | _mmx_supported = 0; |
| 5442 | #endif /* PNG_MMX_CODE_SUPPORTED */ |
| 5443 | |
| 5444 | return _mmx_supported; |
| 5445 | } |
| 5446 | |
| 5447 | |
| 5448 | #endif /* PNG_USE_PNGGCCRD */ |