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Rebuild with --disable-stack-protector for mingw32
author Chris Cannam
date Fri, 25 Jan 2019 14:31:07 +0000
parents 2cd0e3b3e1fd
children
rev   line source
Chris@42 1 FFTW 3.3.5:
Chris@42 2
Chris@42 3 * New SIMD support:
Chris@42 4 - Power8 VSX instructions in single and double precision.
Chris@42 5 To use, add --enable-vsx to configure.
Chris@42 6 - Support for AVX2 (256-bit FMA instructions).
Chris@42 7 To use, add --enable-avx2 to configure.
Chris@42 8 - Experimental support for AVX512 and KCVI. (--enable-avx512, --enable-kcvi)
Chris@42 9 This code is expected to work but the FFTW maintainers do not have
Chris@42 10 hardware to test it.
Chris@42 11 - Support for AVX128/FMA (for some AMD machines) (--enable-avx128-fma)
Chris@42 12 - Double precision Neon SIMD for aarch64.
Chris@42 13 This code is expected to work but the FFTW maintainers do not have
Chris@42 14 hardware to test it.
Chris@42 15 - generic SIMD support using gcc vector intrinsics
Chris@42 16 * Add fftw_make_planner_thread_safe() API
Chris@42 17 * fix #18 (disable float128 for CUDACC)
Chris@42 18 * fix #19: missing Fortran interface for fftwq_alloc_real
Chris@42 19 * fix #21 (don't use float128 on Portland compilers, which pretend to be gcc)
Chris@42 20 * fix: Avoid segfaults due to double free in MPI transpose
Chris@42 21
Chris@42 22 * Special note for distribution maintainers: Although FFTW supports a
Chris@42 23 zillion SIMD instruction sets, enabling them all at the same time is
Chris@42 24 a bad idea, because it increases the planning time for minimal gain.
Chris@42 25 We recommend that general-purpose x86 distributions only enable SSE2
Chris@42 26 and perhaps AVX. Users who care about the last ounce of performance
Chris@42 27 should recompile FFTW themselves.
Chris@42 28
Chris@42 29 FFTW 3.3.4
Chris@42 30
Chris@42 31 * New functions fftw_alignment_of (to check whether two arrays are
Chris@42 32 equally aligned for the purposes of applying a plan) and fftw_sprint_plan
Chris@42 33 (to output a description of plan to a string).
Chris@42 34
Chris@42 35 * Bugfix in fftw-wisdom-to-conf; thanks to Florian Oppermann for the
Chris@42 36 bug report.
Chris@42 37
Chris@42 38 * Fixed manual to work with texinfo-5.
Chris@42 39
Chris@42 40 * Increased timing interval on x86_64 to reduce timing errors.
Chris@42 41
Chris@42 42 * Default to Win32 threads, not pthreads, if both are present.
Chris@42 43
Chris@42 44 * Various build-script fixes.
Chris@42 45
Chris@42 46 FFTW 3.3.3
Chris@42 47
Chris@42 48 * Fix deadlock bug in MPI transforms (thanks to Michael Pippig for the
Chris@42 49 bug report and patch, and to Graham Dennis for the bug report).
Chris@42 50
Chris@42 51 * Use 128-bit ARM NEON instructions instead of 64-bits. This change
Chris@42 52 appears to speed up even ARM processors with a 64-bit NEON pipe.
Chris@42 53
Chris@42 54 * Speed improvements for single-precision AVX.
Chris@42 55
Chris@42 56 * Speed up planner on machines without "official" cycle counters, such as ARM.
Chris@42 57
Chris@42 58 FFTW 3.3.2
Chris@42 59
Chris@42 60 * Removed an archaic stack-alignment hack that was failing with
Chris@42 61 gcc-4.7/i386.
Chris@42 62
Chris@42 63 * Added stack-alignment hack necessary for gcc on Windows/i386. We
Chris@42 64 will regret this in ten years (see previous change).
Chris@42 65
Chris@42 66 * Fix incompatibility with Intel icc which pretends to be gcc
Chris@42 67 but does not support quad precision.
Chris@42 68
Chris@42 69 * make libfftw{threads,mpi} depend upon libfftw when using libtool;
Chris@42 70 this is consistent with most other libraries and simplifies the life
Chris@42 71 of various distributors of GNU/Linux.
Chris@42 72
Chris@42 73 FFTW 3.3.1
Chris@42 74
Chris@42 75 * Changes since 3.3.1-beta1:
Chris@42 76
Chris@42 77 - Reduced planning time in estimate mode for sizes with large
Chris@42 78 prime factors.
Chris@42 79
Chris@42 80 - Added AVX autodetection under Visual Studio. Thanks Carsten
Chris@42 81 Steger for submitting the necessary code.
Chris@42 82
Chris@42 83 - Modern Fortran interface now uses a separate fftw3l.f03 interface
Chris@42 84 file for the long double interface, which is not supported by
Chris@42 85 some Fortran compilers. Provided new fftw3q.f03 interface file
Chris@42 86 to access the quadruple-precision FFTW routines with recent
Chris@42 87 versions of gcc/gfortran.
Chris@42 88
Chris@42 89 * Added support for the NEON extensions to the ARM ISA. (Note to beta
Chris@42 90 users: an ARM cycle counter is not yet implemented; please contact
Chris@42 91 fftw@fftw.org if you know how to do it right.)
Chris@42 92
Chris@42 93 * MPI code now compiles even if mpicc is a C++ compiler; thanks to
Chris@42 94 Kyle Spyksma for the bug report.
Chris@42 95
Chris@42 96 FFTW 3.3
Chris@42 97
Chris@42 98 * Changes since 3.3-beta1:
Chris@42 99
Chris@42 100 - Compiling OpenMP support (--enable-openmp) now installs a
Chris@42 101 fftw3_omp library, instead of fftw3_threads, so that OpenMP
Chris@42 102 and POSIX threads (--enable-threads) libraries can be built
Chris@42 103 and installed at the same time.
Chris@42 104
Chris@42 105 - Various minor compilation fixes, corrections of manual typos, and
Chris@42 106 improvements to the benchmark test program.
Chris@42 107
Chris@42 108 * Add support for the AVX extensions to x86 and x86-64. The AVX code
Chris@42 109 works with 16-byte alignment (as opposed to 32-byte alignment),
Chris@42 110 so there is no ABI change compared to FFTW 3.2.2.
Chris@42 111
Chris@42 112 * Added Fortran 2003 interface, which should be usable on most modern
Chris@42 113 Fortran compilers (e.g. gfortran) and provides type-checked access
Chris@42 114 to the the C FFTW interface. (The legacy Fortran-77 interface is
Chris@42 115 still included also.)
Chris@42 116
Chris@42 117 * Added MPI distributed-memory transforms. Compared to 3.3alpha,
Chris@42 118 the major changes in the MPI transforms are:
Chris@42 119 - Fixed some deadlock and crashing bugs.
Chris@42 120 - Added Fortran 2003 interface.
Chris@42 121 - Added new-array execute functions for MPI plans.
Chris@42 122 - Eliminated use of large MPI tags, since Cray MPI requires tags < 2^24;
Chris@42 123 thanks to Jonathan Bentz for the bug report.
Chris@42 124 - Expanded documentation.
Chris@42 125 - 'make check' now runs MPI tests
Chris@42 126 - Some ABI changes - not binary-compatible with 3.3alpha MPI.
Chris@42 127
Chris@42 128 * Add support for quad-precision __float128 in gcc 4.6 or later (on x86.
Chris@42 129 x86-64, and Itanium). The new routines use the fftwq_ prefix.
Chris@42 130
Chris@42 131 * Removed support for MIPS paired-single instructions due to lack of
Chris@42 132 available hardware for testing. Users who want this functionality
Chris@42 133 should continue using FFTW 3.2.x. (Note that FFTW 3.3 still works
Chris@42 134 on MIPS; this only concerns special instructions available on some
Chris@42 135 MIPS chips.)
Chris@42 136
Chris@42 137 * Removed support for the Cell Broadband Engine. Cell users should
Chris@42 138 use FFTW 3.2.x.
Chris@42 139
Chris@42 140 * New convenience functions fftw_alloc_real and fftw_alloc_complex
Chris@42 141 to use fftw_malloc for real and complex arrays without typecasts
Chris@42 142 or sizeof.
Chris@42 143
Chris@42 144 * New convenience functions fftw_export_wisdom_to_filename and
Chris@42 145 fftw_import_wisdom_from_filename that export/import wisdom
Chris@42 146 to a file, which don't require you to open/close the file yourself.
Chris@42 147
Chris@42 148 * New function fftw_cost to return FFTW's internal cost metric for
Chris@42 149 a given plan; thanks to Rhys Ulerich and Nathanael Schaeffer for the
Chris@42 150 suggestion.
Chris@42 151
Chris@42 152 * The --enable-sse2 configure flag now works in both double and single
Chris@42 153 precision (and is equivalent to --enable-sse in the latter case).
Chris@42 154
Chris@42 155 * Remove --enable-portable-binary flag: we new produce portable binaries
Chris@42 156 by default.
Chris@42 157
Chris@42 158 * Remove the automatic detection of native architecture flag for gcc
Chris@42 159 which was introduced in fftw-3.1, since new gcc supports -mtune=native.
Chris@42 160 Remove the --with-gcc-arch flag; if you want to specify a particlar
Chris@42 161 arch to configure, use ./configure CC="gcc -mtune=...".
Chris@42 162
Chris@42 163 * --with-our-malloc16 configure flag is now renamed --with-our-malloc.
Chris@42 164
Chris@42 165 * Fixed build problem failure when srand48 declaration is missing;
Chris@42 166 thanks to Ralf Wildenhues for the bug report.
Chris@42 167
Chris@42 168 * Fixed bug in fftw_set_timelimit: ensure that a negative timelimit
Chris@42 169 is equivalent to no timelimit in all cases. Thanks to William Andrew
Chris@42 170 Burnson for the bug report.
Chris@42 171
Chris@42 172 * Fixed stack-overflow problem on OpenBSD caused by using alloca with
Chris@42 173 too large a buffer.
Chris@42 174
Chris@42 175 FFTW 3.2.2
Chris@42 176
Chris@42 177 * Improve performance of some copy operations of complex arrays on
Chris@42 178 x86 machines.
Chris@42 179
Chris@42 180 * Add configure flag to disable alloca(), which is broken in mingw64.
Chris@42 181
Chris@42 182 * Planning in FFTW_ESTIMATE mode for r2r transforms became slower
Chris@42 183 between fftw-3.1.3 and 3.2. This regression has now been fixed.
Chris@42 184
Chris@42 185 FFTW 3.2.1
Chris@42 186
Chris@42 187 * Performance improvements for some multidimensional r2c/c2r transforms;
Chris@42 188 thanks to Eugene Miloslavsky for his benchmark reports.
Chris@42 189
Chris@42 190 * Compile with icc on MacOS X, use better icc compiler flags.
Chris@42 191
Chris@42 192 * Compilation fixes for systems where snprintf is defined as a macro;
Chris@42 193 thanks to Marcus Mae for the bug report.
Chris@42 194
Chris@42 195 * Fortran documentation now recommends not using dfftw_execute,
Chris@42 196 because of reports of problems with various Fortran compilers;
Chris@42 197 it is better to use dfftw_execute_dft etcetera.
Chris@42 198
Chris@42 199 * Some documentation clarifications, e.g. of fact that --enable-openmp
Chris@42 200 and --enable-threads are mutually exclusive (thanks to Long To),
Chris@42 201 and document slightly odd behavior of plan_guru_r2r in Fortran
Chris@42 202 (thanks to Alexander Pozdneev).
Chris@42 203
Chris@42 204 * FAQ was accidentally omitted from 3.2 tarball.
Chris@42 205
Chris@42 206 * Remove some extraneous (harmless) files accidentally included in
Chris@42 207 a subdirectory of the 3.2 tarball.
Chris@42 208
Chris@42 209 FFTW 3.2
Chris@42 210
Chris@42 211 * Worked around apparent glibc bug that leads to rare hangs when freeing
Chris@42 212 semaphores.
Chris@42 213
Chris@42 214 * Fixed segfault due to unaligned access in certain obscure problems
Chris@42 215 that use SSE and multiple threads.
Chris@42 216
Chris@42 217 * MPI transforms not included, as they are still in alpha; the alpha
Chris@42 218 versions of the MPI transforms have been moved to FFTW 3.3alpha1.
Chris@42 219
Chris@42 220 FFTW 3.2alpha3
Chris@42 221
Chris@42 222 * Performance improvements for sizes with factors of 5 and 10.
Chris@42 223
Chris@42 224 * Documented FFTW_WISDOM_ONLY flag, at the suggestion of Mario
Chris@42 225 Emmenlauer and Phil Dumont.
Chris@42 226
Chris@42 227 * Port Cell code to SDK2.1 (libspe2), as opposed to the old libspe1 code.
Chris@42 228
Chris@42 229 * Performance improvements in Cell code for N < 32k, thanks to Jan Wagner
Chris@42 230 for the suggestions.
Chris@42 231
Chris@42 232 * Cycle counter for Sun x86_64 compiler, and compilation fix in cycle
Chris@42 233 counter for AIX/xlc (thanks to Jeff Haferman for the bug report).
Chris@42 234
Chris@42 235 * Fixed incorrect type prefix in MPI code that prevented wisdom routines
Chris@42 236 from working in single precision (thanks to Eric A. Borisch for the report).
Chris@42 237
Chris@42 238 * Added 'make check' for MPI code (which still fails in a couple corner
Chris@42 239 cases, but should be much better than in alpha2).
Chris@42 240
Chris@42 241 * Many other small fixes.
Chris@42 242
Chris@42 243 FFTW 3.2alpha2
Chris@42 244
Chris@42 245 * Support for the Cell processor, donated by IBM Research; see README.Cell
Chris@42 246 and the Cell section of the manual.
Chris@42 247
Chris@42 248 * New 64-bit API: for every "plan_guru" function there is a new "plan_guru64"
Chris@42 249 function with the same semantics, but which takes fftw_iodim64 instead of
Chris@42 250 fftw_iodim. fftw_iodim64 is the same as fftw_iodim, except that it takes
Chris@42 251 ptrdiff_t integer types as parameters, which is a 64-bit type on
Chris@42 252 64-bit machines. This is only useful for specifying very large transforms
Chris@42 253 on 64-bit machines. (Internally, FFTW uses ptrdiff_t everywhere
Chris@42 254 regardless of what API you choose.)
Chris@42 255
Chris@42 256 * Experimental MPI support. Complex one- and multi-dimensional FFTs,
Chris@42 257 multi-dimensional r2r, multi-dimensional r2c/c2r transforms, and
Chris@42 258 distributed transpose operations, with 1d block distributions.
Chris@42 259 (This is an alpha preview: routines have not been exhaustively
Chris@42 260 tested, documentation is incomplete, and some functionality is
Chris@42 261 missing, e.g. Fortran support.) See mpi/README and also the MPI
Chris@42 262 section of the manual.
Chris@42 263
Chris@42 264 * Significantly faster r2c/c2r transforms, especially on machines with SIMD.
Chris@42 265
Chris@42 266 * Rewritten multi-threaded support for better performance by
Chris@42 267 re-using a fixed pool of threads rather than continually
Chris@42 268 respawning and joining (which nowadays is much slower).
Chris@42 269
Chris@42 270 * Support for MIPS paired-single SIMD instructions, donated by
Chris@42 271 Codesourcery.
Chris@42 272
Chris@42 273 * FFTW_WISDOM_ONLY planner flag, to create plan only if wisdom is
Chris@42 274 available and return NULL otherwise.
Chris@42 275
Chris@42 276 * Removed k7 support, which only worked in 32-bit mode and is
Chris@42 277 becoming obsolete. Use --enable-sse instead.
Chris@42 278
Chris@42 279 * Added --with-g77-wrappers configure option to force inclusion
Chris@42 280 of g77 wrappers, in addition to whatever is needed for the
Chris@42 281 detected Fortran compilers. This is mainly intended for GNU/Linux
Chris@42 282 distros switching to gfortran that wish to include both
Chris@42 283 gfortran and g77 support in FFTW.
Chris@42 284
Chris@42 285 * In manual, renamed "guru execute" functions to "new-array execute"
Chris@42 286 functions, to reduce confusion with the guru planner interface.
Chris@42 287 (The programming interface is unchanged.)
Chris@42 288
Chris@42 289 * Add missing __declspec attribute to threads API functions when compiling
Chris@42 290 for Windows; thanks to Robert O. Morris for the bug report.
Chris@42 291
Chris@42 292 * Fixed missing return value from dfftw_init_threads in Fortran;
Chris@42 293 thanks to Markus Wetzstein for the bug report.
Chris@42 294
Chris@42 295 FFTW 3.1.3
Chris@42 296
Chris@42 297 * Bug fix: FFTW computes incorrect results when the user plans both
Chris@42 298 REDFT11 and RODFT11 transforms of certain sizes. The bug is caused
Chris@42 299 by incorrect sharing of twiddle-factor tables between the two
Chris@42 300 transforms, and only occurs when both are used. Thanks to Paul
Chris@42 301 A. Valiant for the bug report.
Chris@42 302
Chris@42 303 FFTW 3.1.2
Chris@42 304
Chris@42 305 * Correct bug in configure script: --enable-portable-binary option was ignored!
Chris@42 306 Thanks to Andrew Salamon for the bug report.
Chris@42 307
Chris@42 308 * Threads compilation fix on AIX: prefer xlc_r to cc_r, and don't use
Chris@42 309 either if we are using gcc. Thanks to Guy Moebs for the bug report.
Chris@42 310
Chris@42 311 * Updated FAQ to note that Apple gcc 4.0.1 on MacOS/Intel is broken,
Chris@42 312 and suggest a workaround. configure script now detects Core/Duo arch.
Chris@42 313
Chris@42 314 * Use -maltivec when checking for altivec.h. Fixes Gentoo bug #129304,
Chris@42 315 thanks to Markus Dittrich.
Chris@42 316
Chris@42 317 FFTW 3.1.1
Chris@42 318
Chris@42 319 * Performance improvements for Intel EMT64.
Chris@42 320
Chris@42 321 * Performance improvements for large-size transforms with SIMD.
Chris@42 322
Chris@42 323 * Cycle counter support for Intel icc and Visual C++ on x86-64.
Chris@42 324
Chris@42 325 * In fftw-wisdom tool, replaced obsolete --impatient with --measure.
Chris@42 326
Chris@42 327 * Fixed compilation failure with AIX/xlc; thanks to Joseph Thomas.
Chris@42 328
Chris@42 329 * Windows DLL support for Fortran API (added missing __declspec(dllexport)).
Chris@42 330
Chris@42 331 * SSE/SSE2 code works properly (i.e. disables itself) on older 386 and 486
Chris@42 332 CPUs lacking a CPUID instruction; thanks to Eric Korpela.
Chris@42 333
Chris@42 334 FFTW 3.1
Chris@42 335
Chris@42 336 * Faster FFTW_ESTIMATE planner.
Chris@42 337
Chris@42 338 * New (faster) algorithm for REDFT00/RODFT00 (type-I DCT/DST) of odd size.
Chris@42 339
Chris@42 340 * "4-step" algorithm for faster FFTs of very large sizes (> 2^18).
Chris@42 341
Chris@42 342 * Faster in-place real-data DFTs (for R2HC and HC2R r2r formats).
Chris@42 343
Chris@42 344 * Faster in-place non-square transpositions (FFTW uses these internally
Chris@42 345 for in-place FFTs, and you can also perform them explicitly using
Chris@42 346 the guru interface).
Chris@42 347
Chris@42 348 * Faster prime-size DFTs: implemented Bluestein's algorithm, as well
Chris@42 349 as a zero-padded Rader variant to limit recursive use of Rader's algorithm.
Chris@42 350
Chris@42 351 * SIMD support for split complex arrays.
Chris@42 352
Chris@42 353 * Much faster Altivec/VMX performance.
Chris@42 354
Chris@42 355 * New fftw_set_timelimit function to specify a (rough) upper bound to the
Chris@42 356 planning time (does not affect ESTIMATE mode).
Chris@42 357
Chris@42 358 * Removed --enable-3dnow support; use --enable-k7 instead.
Chris@42 359
Chris@42 360 * FMA (fused multiply-add) version is now included in "standard" FFTW,
Chris@42 361 and is enabled with --enable-fma (the default on PowerPC and Itanium).
Chris@42 362
Chris@42 363 * Automatic detection of native architecture flag for gcc. New
Chris@42 364 configure options: --enable-portable-binary and --with-gcc-arch=<arch>,
Chris@42 365 for people distributing compiled binaries of FFTW (see manual).
Chris@42 366
Chris@42 367 * Automatic detection of Altivec under Linux with gcc 3.4 (so that
Chris@42 368 same binary should work on both Altivec and non-Altivec PowerPCs).
Chris@42 369
Chris@42 370 * Compiler-specific tweaks/flags/workarounds for gcc 3.4, xlc, HP/UX,
Chris@42 371 Solaris/Intel.
Chris@42 372
Chris@42 373 * Various documentation clarifications.
Chris@42 374
Chris@42 375 * 64-bit clean. (Fixes a bug affecting the split guru planner on
Chris@42 376 64-bit machines, reported by David Necas.)
Chris@42 377
Chris@42 378 * Fixed Debian bug #259612: inadvertent use of SSE instructions on
Chris@42 379 non-SSE machines (causing a crash) for --enable-sse binaries.
Chris@42 380
Chris@42 381 * Fixed bug that caused HC2R transforms to destroy the input in
Chris@42 382 certain cases, even if the user specified FFTW_PRESERVE_INPUT.
Chris@42 383
Chris@42 384 * Fixed bug where wisdom would be lost under rare circumstances,
Chris@42 385 causing excessive planning time.
Chris@42 386
Chris@42 387 * FAQ notes bug in gcc-3.4.[1-3] that causes FFTW to crash with SSE/SSE2.
Chris@42 388
Chris@42 389 * Fixed accidentally exported symbol that prohibited simultaneous
Chris@42 390 linking to double/single multithreaded FFTW (thanks to Alessio Massaro).
Chris@42 391
Chris@42 392 * Support Win32 threads under MinGW (thanks to Alessio Massaro).
Chris@42 393
Chris@42 394 * Fixed problem with building DLL under Cygwin; thanks to Stephane Fillod.
Chris@42 395
Chris@42 396 * Fix build failure if no Fortran compiler is found (thanks to Charles
Chris@42 397 Radley for the bug report).
Chris@42 398
Chris@42 399 * Fixed compilation failure with icc 8.0 and SSE/SSE2. Automatic
Chris@42 400 detection of icc architecture flag (e.g. -xW).
Chris@42 401
Chris@42 402 * Fixed compilation with OpenMP on AIX (thanks to Greg Bauer).
Chris@42 403
Chris@42 404 * Fixed compilation failure on x86-64 with gcc (thanks to Orion Poplawski).
Chris@42 405
Chris@42 406 * Incorporated patch from FreeBSD ports (FreeBSD does not have memalign,
Chris@42 407 but its malloc is 16-byte aligned).
Chris@42 408
Chris@42 409 * Cycle-counter compilation fixes for Itanium, Alpha, x86-64, Sparc,
Chris@42 410 MacOS (thanks to Matt Boman, John Bowman, and James A. Treacy for
Chris@42 411 reports/fixes). Added x86-64 cycle counter for PGI compilers,
Chris@42 412 courtesy Cristiano Calonaci.
Chris@42 413
Chris@42 414 * Fix compilation problem in test program due to C99 conflict.
Chris@42 415
Chris@42 416 * Portability fix for import_system_wisdom with djgpp (thanks to Juan
Chris@42 417 Manuel Guerrero).
Chris@42 418
Chris@42 419 * Fixed compilation failure on MacOS 10.3 due to getopt conflict.
Chris@42 420
Chris@42 421 * Work around Visual C++ (version 6/7) bug in SSE compilation;
Chris@42 422 thanks to Eddie Yee for his detailed report.
Chris@42 423
Chris@42 424 Changes from FFTW 3.1 beta 2:
Chris@42 425
Chris@42 426 * Several minor compilation fixes.
Chris@42 427
Chris@42 428 * Eliminate FFTW_TIMELIMIT flag and replace fftw_timelimit global with
Chris@42 429 fftw_set_timelimit function. Make wisdom work with time-limited plans.
Chris@42 430
Chris@42 431 Changes from FFTW 3.1 beta 1:
Chris@42 432
Chris@42 433 * Fixes for creating DLLs under Windows; thanks to John Pavel for his feedback.
Chris@42 434
Chris@42 435 * Fixed more 64-bit problems, thanks to John Pavel for the bug report.
Chris@42 436
Chris@42 437 * Further speed improvements for Altivec/VMX.
Chris@42 438
Chris@42 439 * Further speed improvements for non-square transpositions.
Chris@42 440
Chris@42 441 * Many minor tweaks.
Chris@42 442
Chris@42 443 FFTW 3.0.1
Chris@42 444
Chris@42 445 * Some speed improvements in SIMD code.
Chris@42 446
Chris@42 447 * --without-cycle-counter option is removed. If no cycle counter is found,
Chris@42 448 then the estimator is always used. A --with-slow-timer option is provided
Chris@42 449 to force the use of lower-resolution timers.
Chris@42 450
Chris@42 451 * Several fixes for compilation under Visual C++, with help from Stefane Ruel.
Chris@42 452
Chris@42 453 * Added x86 cycle counter for Visual C++, with help from Morten Nissov.
Chris@42 454
Chris@42 455 * Added S390 cycle counter, courtesy of James Treacy.
Chris@42 456
Chris@42 457 * Added missing static keyword that prevented simultaneous linkage
Chris@42 458 of different-precision versions; thanks to Rasmus Larsen for the bug report.
Chris@42 459
Chris@42 460 * Corrected accidental omission of f77_wisdom.f file; thanks to Alan Watson.
Chris@42 461
Chris@42 462 * Support -xopenmp flag for SunOS; thanks to John Lou for the bug report.
Chris@42 463
Chris@42 464 * Compilation with HP/UX cc requires -Wp,-H128000 flag to increase
Chris@42 465 preprocessor limits; thanks to Peter Vouras for the bug report.
Chris@42 466
Chris@42 467 * Removed non-portable use of 'tempfile' in fftw-wisdom-to-conf script;
Chris@42 468 thanks to Nicolas Decoster for the patch.
Chris@42 469
Chris@42 470 * Added 'make smallcheck' target in tests/ directory, at the request of
Chris@42 471 James Treacy.
Chris@42 472
Chris@42 473 FFTW 3.0
Chris@42 474
Chris@42 475 Major goals of this release:
Chris@42 476
Chris@42 477 * Speed: often 20% or more faster than FFTW 2.x, even without SIMD (see below).
Chris@42 478
Chris@42 479 * Complete rewrite, to make it easier to add new algorithms and transforms.
Chris@42 480
Chris@42 481 * New API, to support more general semantics.
Chris@42 482
Chris@42 483 Other enhancements:
Chris@42 484
Chris@42 485 * SIMD acceleration on supporting CPUs (SSE, SSE2, 3DNow!, and AltiVec).
Chris@42 486 (With special thanks to Franz Franchetti for many experimental prototypes
Chris@42 487 and to Stefan Kral for the vectorizing generator from fftwgel.)
Chris@42 488
Chris@42 489 * True in-place 1d transforms of large sizes (as well as compressed
Chris@42 490 twiddle tables for additional memory/cache savings).
Chris@42 491
Chris@42 492 * More arbitrary placement of real & imaginary data, e.g. including
Chris@42 493 interleaved (as in FFTW 2.x) as well as separate real/imag arrays.
Chris@42 494
Chris@42 495 * Efficient prime-size transforms of real data.
Chris@42 496
Chris@42 497 * Multidimensional transforms can operate on a subset of a larger matrix,
Chris@42 498 and/or transform selected dimensions of a multidimensional array.
Chris@42 499
Chris@42 500 * By popular demand, simultaneous linking to double precision (fftw),
Chris@42 501 single precision (fftwf), and long-double precision (fftwl) versions
Chris@42 502 of FFTW is now supported.
Chris@42 503
Chris@42 504 * Cycle counters (on all modern CPUs) are exploited to speed planning.
Chris@42 505
Chris@42 506 * Efficient transforms of real even/odd arrays, a.k.a. discrete
Chris@42 507 cosine/sine transforms (types I-IV). (Currently work via pre/post
Chris@42 508 processing of real transforms, ala FFTPACK, so are not optimal.)
Chris@42 509
Chris@42 510 * DHTs (Discrete Hartley Transforms), again via post-processing
Chris@42 511 of real transforms (and thus suboptimal, for now).
Chris@42 512
Chris@42 513 * Support for linking to just those parts of FFTW that you need,
Chris@42 514 greatly reducing the size of statically linked programs when
Chris@42 515 only a limited set of transform sizes/types are required.
Chris@42 516
Chris@42 517 * Canonical global wisdom file (/etc/fftw/wisdom) on Unix, along
Chris@42 518 with a command-line tool (fftw-wisdom) to generate/update it.
Chris@42 519
Chris@42 520 * Fortran API can be used with both g77 and non-g77 compilers
Chris@42 521 simultaneously.
Chris@42 522
Chris@42 523 * Multi-threaded version has optional OpenMP support.
Chris@42 524
Chris@42 525 * Authors' good looks have greatly improved with age.
Chris@42 526
Chris@42 527 Changes from 3.0beta3:
Chris@42 528
Chris@42 529 * Separate FMA distribution to better exploit fused multiply-add instructions
Chris@42 530 on PowerPC (and possibly other) architectures.
Chris@42 531
Chris@42 532 * Performance improvements via some inlining tweaks.
Chris@42 533
Chris@42 534 * fftw_flops now returns double arguments, not int, to avoid overflows
Chris@42 535 for large sizes.
Chris@42 536
Chris@42 537 * Workarounds for automake bugs.
Chris@42 538
Chris@42 539 Changes from 3.0beta2:
Chris@42 540
Chris@42 541 * The standard REDFT00/RODFT00 (DCT-I/DST-I) algorithm (used in
Chris@42 542 FFTPACK, NR, etcetera) turns out to have poor numerical accuracy, so
Chris@42 543 we replaced it with a slower routine that is more accurate.
Chris@42 544
Chris@42 545 * The guru planner and execute functions now have two variants, one that
Chris@42 546 takes complex arguments and one that takes separate real/imag pointers.
Chris@42 547
Chris@42 548 * Execute and planner routines now automatically align the stack on x86,
Chris@42 549 in case the calling program is misaligned.
Chris@42 550
Chris@42 551 * README file for test program.
Chris@42 552
Chris@42 553 * Fixed bugs in the combination of SIMD with multi-threaded transforms.
Chris@42 554
Chris@42 555 * Eliminated internal fftw_threads_init function, which some people were
Chris@42 556 calling accidentally instead of the fftw_init_threads API function.
Chris@42 557
Chris@42 558 * Check for -openmp flag (Intel C compiler) when --enable-openmp is used.
Chris@42 559
Chris@42 560 * Support AMD x86-64 SIMD and cycle counter.
Chris@42 561
Chris@42 562 * Support SSE2 intrinsics in forthcoming gcc 3.3.
Chris@42 563
Chris@42 564 Changes from 3.0beta1:
Chris@42 565
Chris@42 566 * Faster in-place 1d transforms of non-power-of-two sizes.
Chris@42 567
Chris@42 568 * SIMD improvements for in-place, multi-dimensional, and/or non-FFTW_PATIENT
Chris@42 569 transforms.
Chris@42 570
Chris@42 571 * Added support for hard-coded DCT/DST/DHT codelets of small sizes; the
Chris@42 572 default distribution only includes hard-coded size-8 DCT-II/III, however.
Chris@42 573
Chris@42 574 * Many minor improvements to the manual. Added section on using the
Chris@42 575 codelet generator to customize and enhance FFTW.
Chris@42 576
Chris@42 577 * The default 'make check' should now only take a few minutes; for more
Chris@42 578 strenuous tests (which may take a day or so), do 'cd tests; make bigcheck'.
Chris@42 579
Chris@42 580 * fftw_print_plan is split into fftw_fprint_plan and fftw_print_plan, where
Chris@42 581 the latter uses stdout.
Chris@42 582
Chris@42 583 * Fixed ability to compile with a C++ compiler.
Chris@42 584
Chris@42 585 * Fixed support for C99 complex type under glibc.
Chris@42 586
Chris@42 587 * Fixed problems with alloca under MinGW, AIX.
Chris@42 588
Chris@42 589 * Workaround for gcc/SPARC bug.
Chris@42 590
Chris@42 591 * Fixed multi-threaded initialization failure on IRIX due to lack of
Chris@42 592 user-accessible PTHREAD_SCOPE_SYSTEM there.