mirror of
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54e93db207
not reliable yet
681 lines
25 KiB
Text
681 lines
25 KiB
Text
FFTW 3.3.10:
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* Fix bug that would cause 2-way SIMD (notably SSE2 in double precision)
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to attempt unaligned accesses in certain obscure cases, causing
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segfaults.
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The following test triggers the bug (SSE2, double precision):
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./tests/bench -oexhaustive r4*2:5:3
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This test computes a pair of length-4 real->complex transforms where
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the second input is 5 real numbers away from the first input. That
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is, there is a gap of one real number between the first and second
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input array. The -oexhaustive level allow FFTW to attempt to
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compute this transform by reducing it to a pair of complex
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transforms of length 2, but now the second input is not aligned to a
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complex-number boundary. The fact that 5 is odd is the problem.
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The bug cannot occur in complex->complex transforms because the
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complex interface accepts strides in units of complex numbers, so
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strides are aligned by construction.
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This bug has been around at least since fftw-3.1.2 (July 2006), and
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probably since fftw-3.0 (2003).
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FFTW 3.3.9:
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* New API fftw_planner_nthreads() returns the number of threads
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currently being used by the planner.
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* Fix incorrect math in 128-bit generic SIMD
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* Fix wisdom for avx512.
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The avx512 alignment requirement was set to 64 bytes, but this is
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wrong. Alignment requirements are a property of the platform (e.g.,
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x86) and not of the instruction set (e.g., AVX). Among other
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things, this broke wisdom with avx512.
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Note that avx512 support is still experimental because the FFTW
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authors have no avx512 hardware available for testing.
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* fftw_threads_set_callback function to change the threading backend at runtime.
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FFTW 3.3.8:
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* Fixed AVX, AVX2 for gcc-8.
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By default, FFTW 3.3.7 was broken with gcc-8. AVX and AVX2 code
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assumed that the compiler honors the distinction between +0 and -0,
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but gcc-8 -ffast-math does not. The default CFLAGS included -ffast-math.
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This release ensures that FFTW works with gcc-8 -ffast-math, and
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removes -ffast-math from the default CFLAGS for good measure.
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FFTW 3.3.7:
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* Experimental support for CMake.
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The primary build mechanism for FFTW remains GNU autoconf/automake.
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CMake support is meant to offer an easy way to compile FFTW on
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Windows, and as such it does not cover all the features of the
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automake build system, such as exotic cycle counters,
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cross-compiling, or build of binaries for a mixture of ISA's
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(e.g., amd64 vs amd64+avx vs amd64+avx2). Patches are welcome.
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* Fixes for armv7a cycle counter.
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* Official support for aarch64, now that we have hardware to test it.
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* Tweak usage of FMA instructions in a way that favors newer processors
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(Skylake and Ryzen) over older processors (Haswell).
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* tests/bench: use 64-bit precision to compute mflops.
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FFTW 3.3.6-pl2:
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* Bugfix: MPI Fortran-03 headers were missing in FFTW 3.3.6-pl1.
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FFTW 3.3.6-pl1:
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* Bugfix: FFTW 3.3.6 had the wrong libtool version number, and generated
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shared libraries of the form libfftw3.so.2.6.6 instead of
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libfftw3.so.3.*.
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FFTW 3.3.6:
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* The fftw_make_planner_thread_safe() API introduced in 3.3.5 didn't
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work, and this 3.3.6 fixes it. Sorry about that.
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* compilation fixes for IBM XLC
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* compilation fixes for threads on Windows
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* fix SIMD autodetection on amd64 when (_MSC_VER > 1500)
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FFTW 3.3.5:
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* New SIMD support:
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- Power8 VSX instructions in single and double precision.
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To use, add --enable-vsx to configure.
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- Support for AVX2 (256-bit FMA instructions).
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To use, add --enable-avx2 to configure.
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- Experimental support for AVX512 and KCVI. (--enable-avx512, --enable-kcvi)
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This code is expected to work but the FFTW maintainers do not have
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hardware to test it.
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- Support for AVX128/FMA (for some AMD machines) (--enable-avx128-fma)
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- Double precision Neon SIMD for aarch64.
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This code is expected to work but the FFTW maintainers do not have
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hardware to test it.
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- generic SIMD support using gcc vector intrinsics
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* Add fftw_make_planner_thread_safe() API
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* fix #18 (disable float128 for CUDACC)
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* fix #19: missing Fortran interface for fftwq_alloc_real
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* fix #21 (don't use float128 on Portland compilers, which pretend to be gcc)
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* fix: Avoid segfaults due to double free in MPI transpose
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* Special note for distribution maintainers: Although FFTW supports a
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zillion SIMD instruction sets, enabling them all at the same time is
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a bad idea, because it increases the planning time for minimal gain.
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We recommend that general-purpose x86 distributions only enable SSE2
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and perhaps AVX. Users who care about the last ounce of performance
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should recompile FFTW themselves.
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FFTW 3.3.4
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* New functions fftw_alignment_of (to check whether two arrays are
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equally aligned for the purposes of applying a plan) and fftw_sprint_plan
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(to output a description of plan to a string).
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* Bugfix in fftw-wisdom-to-conf; thanks to Florian Oppermann for the
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bug report.
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* Fixed manual to work with texinfo-5.
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* Increased timing interval on x86_64 to reduce timing errors.
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* Default to Win32 threads, not pthreads, if both are present.
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* Various build-script fixes.
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FFTW 3.3.3
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* Fix deadlock bug in MPI transforms (thanks to Michael Pippig for the
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bug report and patch, and to Graham Dennis for the bug report).
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* Use 128-bit ARM NEON instructions instead of 64-bits. This change
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appears to speed up even ARM processors with a 64-bit NEON pipe.
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* Speed improvements for single-precision AVX.
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* Speed up planner on machines without "official" cycle counters, such as ARM.
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FFTW 3.3.2
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* Removed an archaic stack-alignment hack that was failing with
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gcc-4.7/i386.
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* Added stack-alignment hack necessary for gcc on Windows/i386. We
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will regret this in ten years (see previous change).
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* Fix incompatibility with Intel icc which pretends to be gcc
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but does not support quad precision.
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* make libfftw{threads,mpi} depend upon libfftw when using libtool;
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this is consistent with most other libraries and simplifies the life
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of various distributors of GNU/Linux.
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FFTW 3.3.1
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* Changes since 3.3.1-beta1:
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- Reduced planning time in estimate mode for sizes with large
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prime factors.
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- Added AVX autodetection under Visual Studio. Thanks Carsten
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Steger for submitting the necessary code.
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- Modern Fortran interface now uses a separate fftw3l.f03 interface
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file for the long double interface, which is not supported by
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some Fortran compilers. Provided new fftw3q.f03 interface file
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to access the quadruple-precision FFTW routines with recent
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versions of gcc/gfortran.
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* Added support for the NEON extensions to the ARM ISA. (Note to beta
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users: an ARM cycle counter is not yet implemented; please contact
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fftw@fftw.org if you know how to do it right.)
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* MPI code now compiles even if mpicc is a C++ compiler; thanks to
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Kyle Spyksma for the bug report.
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FFTW 3.3
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* Changes since 3.3-beta1:
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- Compiling OpenMP support (--enable-openmp) now installs a
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fftw3_omp library, instead of fftw3_threads, so that OpenMP
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and POSIX threads (--enable-threads) libraries can be built
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and installed at the same time.
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- Various minor compilation fixes, corrections of manual typos, and
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improvements to the benchmark test program.
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* Add support for the AVX extensions to x86 and x86-64. The AVX code
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works with 16-byte alignment (as opposed to 32-byte alignment),
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so there is no ABI change compared to FFTW 3.2.2.
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* Added Fortran 2003 interface, which should be usable on most modern
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Fortran compilers (e.g. gfortran) and provides type-checked access
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to the the C FFTW interface. (The legacy Fortran-77 interface is
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still included also.)
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* Added MPI distributed-memory transforms. Compared to 3.3alpha,
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the major changes in the MPI transforms are:
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- Fixed some deadlock and crashing bugs.
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- Added Fortran 2003 interface.
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- Added new-array execute functions for MPI plans.
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- Eliminated use of large MPI tags, since Cray MPI requires tags < 2^24;
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thanks to Jonathan Bentz for the bug report.
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- Expanded documentation.
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- 'make check' now runs MPI tests
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- Some ABI changes - not binary-compatible with 3.3alpha MPI.
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* Add support for quad-precision __float128 in gcc 4.6 or later (on x86.
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x86-64, and Itanium). The new routines use the fftwq_ prefix.
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* Removed support for MIPS paired-single instructions due to lack of
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available hardware for testing. Users who want this functionality
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should continue using FFTW 3.2.x. (Note that FFTW 3.3 still works
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on MIPS; this only concerns special instructions available on some
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MIPS chips.)
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* Removed support for the Cell Broadband Engine. Cell users should
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use FFTW 3.2.x.
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* New convenience functions fftw_alloc_real and fftw_alloc_complex
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to use fftw_malloc for real and complex arrays without typecasts
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or sizeof.
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* New convenience functions fftw_export_wisdom_to_filename and
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fftw_import_wisdom_from_filename that export/import wisdom
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to a file, which don't require you to open/close the file yourself.
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* New function fftw_cost to return FFTW's internal cost metric for
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a given plan; thanks to Rhys Ulerich and Nathanael Schaeffer for the
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suggestion.
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* The --enable-sse2 configure flag now works in both double and single
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precision (and is equivalent to --enable-sse in the latter case).
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* Remove --enable-portable-binary flag: we new produce portable binaries
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by default.
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* Remove the automatic detection of native architecture flag for gcc
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which was introduced in fftw-3.1, since new gcc supports -mtune=native.
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Remove the --with-gcc-arch flag; if you want to specify a particlar
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arch to configure, use ./configure CC="gcc -mtune=...".
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* --with-our-malloc16 configure flag is now renamed --with-our-malloc.
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* Fixed build problem failure when srand48 declaration is missing;
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thanks to Ralf Wildenhues for the bug report.
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* Fixed bug in fftw_set_timelimit: ensure that a negative timelimit
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is equivalent to no timelimit in all cases. Thanks to William Andrew
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Burnson for the bug report.
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* Fixed stack-overflow problem on OpenBSD caused by using alloca with
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too large a buffer.
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FFTW 3.2.2
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* Improve performance of some copy operations of complex arrays on
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x86 machines.
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* Add configure flag to disable alloca(), which is broken in mingw64.
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* Planning in FFTW_ESTIMATE mode for r2r transforms became slower
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between fftw-3.1.3 and 3.2. This regression has now been fixed.
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FFTW 3.2.1
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* Performance improvements for some multidimensional r2c/c2r transforms;
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thanks to Eugene Miloslavsky for his benchmark reports.
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* Compile with icc on MacOS X, use better icc compiler flags.
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* Compilation fixes for systems where snprintf is defined as a macro;
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thanks to Marcus Mae for the bug report.
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* Fortran documentation now recommends not using dfftw_execute,
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because of reports of problems with various Fortran compilers;
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it is better to use dfftw_execute_dft etcetera.
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* Some documentation clarifications, e.g. of fact that --enable-openmp
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and --enable-threads are mutually exclusive (thanks to Long To),
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and document slightly odd behavior of plan_guru_r2r in Fortran
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(thanks to Alexander Pozdneev).
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* FAQ was accidentally omitted from 3.2 tarball.
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* Remove some extraneous (harmless) files accidentally included in
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a subdirectory of the 3.2 tarball.
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FFTW 3.2
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* Worked around apparent glibc bug that leads to rare hangs when freeing
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semaphores.
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* Fixed segfault due to unaligned access in certain obscure problems
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that use SSE and multiple threads.
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* MPI transforms not included, as they are still in alpha; the alpha
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versions of the MPI transforms have been moved to FFTW 3.3alpha1.
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FFTW 3.2alpha3
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* Performance improvements for sizes with factors of 5 and 10.
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* Documented FFTW_WISDOM_ONLY flag, at the suggestion of Mario
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Emmenlauer and Phil Dumont.
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* Port Cell code to SDK2.1 (libspe2), as opposed to the old libspe1 code.
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* Performance improvements in Cell code for N < 32k, thanks to Jan Wagner
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for the suggestions.
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* Cycle counter for Sun x86_64 compiler, and compilation fix in cycle
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counter for AIX/xlc (thanks to Jeff Haferman for the bug report).
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* Fixed incorrect type prefix in MPI code that prevented wisdom routines
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from working in single precision (thanks to Eric A. Borisch for the report).
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* Added 'make check' for MPI code (which still fails in a couple corner
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cases, but should be much better than in alpha2).
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* Many other small fixes.
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FFTW 3.2alpha2
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* Support for the Cell processor, donated by IBM Research; see README.Cell
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and the Cell section of the manual.
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* New 64-bit API: for every "plan_guru" function there is a new "plan_guru64"
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function with the same semantics, but which takes fftw_iodim64 instead of
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fftw_iodim. fftw_iodim64 is the same as fftw_iodim, except that it takes
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ptrdiff_t integer types as parameters, which is a 64-bit type on
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64-bit machines. This is only useful for specifying very large transforms
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on 64-bit machines. (Internally, FFTW uses ptrdiff_t everywhere
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regardless of what API you choose.)
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* Experimental MPI support. Complex one- and multi-dimensional FFTs,
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multi-dimensional r2r, multi-dimensional r2c/c2r transforms, and
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distributed transpose operations, with 1d block distributions.
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(This is an alpha preview: routines have not been exhaustively
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tested, documentation is incomplete, and some functionality is
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missing, e.g. Fortran support.) See mpi/README and also the MPI
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section of the manual.
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* Significantly faster r2c/c2r transforms, especially on machines with SIMD.
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* Rewritten multi-threaded support for better performance by
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re-using a fixed pool of threads rather than continually
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respawning and joining (which nowadays is much slower).
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* Support for MIPS paired-single SIMD instructions, donated by
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Codesourcery.
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* FFTW_WISDOM_ONLY planner flag, to create plan only if wisdom is
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available and return NULL otherwise.
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* Removed k7 support, which only worked in 32-bit mode and is
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becoming obsolete. Use --enable-sse instead.
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* Added --with-g77-wrappers configure option to force inclusion
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of g77 wrappers, in addition to whatever is needed for the
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detected Fortran compilers. This is mainly intended for GNU/Linux
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distros switching to gfortran that wish to include both
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gfortran and g77 support in FFTW.
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* In manual, renamed "guru execute" functions to "new-array execute"
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functions, to reduce confusion with the guru planner interface.
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(The programming interface is unchanged.)
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* Add missing __declspec attribute to threads API functions when compiling
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for Windows; thanks to Robert O. Morris for the bug report.
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* Fixed missing return value from dfftw_init_threads in Fortran;
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thanks to Markus Wetzstein for the bug report.
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FFTW 3.1.3
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* Bug fix: FFTW computes incorrect results when the user plans both
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REDFT11 and RODFT11 transforms of certain sizes. The bug is caused
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by incorrect sharing of twiddle-factor tables between the two
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transforms, and only occurs when both are used. Thanks to Paul
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A. Valiant for the bug report.
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FFTW 3.1.2
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* Correct bug in configure script: --enable-portable-binary option was ignored!
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Thanks to Andrew Salamon for the bug report.
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* Threads compilation fix on AIX: prefer xlc_r to cc_r, and don't use
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either if we are using gcc. Thanks to Guy Moebs for the bug report.
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* Updated FAQ to note that Apple gcc 4.0.1 on MacOS/Intel is broken,
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and suggest a workaround. configure script now detects Core/Duo arch.
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* Use -maltivec when checking for altivec.h. Fixes Gentoo bug #129304,
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thanks to Markus Dittrich.
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FFTW 3.1.1
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* Performance improvements for Intel EMT64.
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* Performance improvements for large-size transforms with SIMD.
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* Cycle counter support for Intel icc and Visual C++ on x86-64.
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* In fftw-wisdom tool, replaced obsolete --impatient with --measure.
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* Fixed compilation failure with AIX/xlc; thanks to Joseph Thomas.
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* Windows DLL support for Fortran API (added missing __declspec(dllexport)).
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* SSE/SSE2 code works properly (i.e. disables itself) on older 386 and 486
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CPUs lacking a CPUID instruction; thanks to Eric Korpela.
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FFTW 3.1
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* Faster FFTW_ESTIMATE planner.
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* New (faster) algorithm for REDFT00/RODFT00 (type-I DCT/DST) of odd size.
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* "4-step" algorithm for faster FFTs of very large sizes (> 2^18).
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* Faster in-place real-data DFTs (for R2HC and HC2R r2r formats).
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* Faster in-place non-square transpositions (FFTW uses these internally
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for in-place FFTs, and you can also perform them explicitly using
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the guru interface).
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* Faster prime-size DFTs: implemented Bluestein's algorithm, as well
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as a zero-padded Rader variant to limit recursive use of Rader's algorithm.
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* SIMD support for split complex arrays.
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* Much faster Altivec/VMX performance.
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* New fftw_set_timelimit function to specify a (rough) upper bound to the
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planning time (does not affect ESTIMATE mode).
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* Removed --enable-3dnow support; use --enable-k7 instead.
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* FMA (fused multiply-add) version is now included in "standard" FFTW,
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and is enabled with --enable-fma (the default on PowerPC and Itanium).
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* Automatic detection of native architecture flag for gcc. New
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configure options: --enable-portable-binary and --with-gcc-arch=<arch>,
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for people distributing compiled binaries of FFTW (see manual).
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* Automatic detection of Altivec under Linux with gcc 3.4 (so that
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same binary should work on both Altivec and non-Altivec PowerPCs).
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* Compiler-specific tweaks/flags/workarounds for gcc 3.4, xlc, HP/UX,
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Solaris/Intel.
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* Various documentation clarifications.
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* 64-bit clean. (Fixes a bug affecting the split guru planner on
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64-bit machines, reported by David Necas.)
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* Fixed Debian bug #259612: inadvertent use of SSE instructions on
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non-SSE machines (causing a crash) for --enable-sse binaries.
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* Fixed bug that caused HC2R transforms to destroy the input in
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certain cases, even if the user specified FFTW_PRESERVE_INPUT.
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* Fixed bug where wisdom would be lost under rare circumstances,
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causing excessive planning time.
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* FAQ notes bug in gcc-3.4.[1-3] that causes FFTW to crash with SSE/SSE2.
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|
|
|
* Fixed accidentally exported symbol that prohibited simultaneous
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|
linking to double/single multithreaded FFTW (thanks to Alessio Massaro).
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|
|
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* Support Win32 threads under MinGW (thanks to Alessio Massaro).
|
|
|
|
* Fixed problem with building DLL under Cygwin; thanks to Stephane Fillod.
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|
|
|
* Fix build failure if no Fortran compiler is found (thanks to Charles
|
|
Radley for the bug report).
|
|
|
|
* Fixed compilation failure with icc 8.0 and SSE/SSE2. Automatic
|
|
detection of icc architecture flag (e.g. -xW).
|
|
|
|
* Fixed compilation with OpenMP on AIX (thanks to Greg Bauer).
|
|
|
|
* Fixed compilation failure on x86-64 with gcc (thanks to Orion Poplawski).
|
|
|
|
* Incorporated patch from FreeBSD ports (FreeBSD does not have memalign,
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|
but its malloc is 16-byte aligned).
|
|
|
|
* Cycle-counter compilation fixes for Itanium, Alpha, x86-64, Sparc,
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|
MacOS (thanks to Matt Boman, John Bowman, and James A. Treacy for
|
|
reports/fixes). Added x86-64 cycle counter for PGI compilers,
|
|
courtesy Cristiano Calonaci.
|
|
|
|
* Fix compilation problem in test program due to C99 conflict.
|
|
|
|
* Portability fix for import_system_wisdom with djgpp (thanks to Juan
|
|
Manuel Guerrero).
|
|
|
|
* Fixed compilation failure on MacOS 10.3 due to getopt conflict.
|
|
|
|
* Work around Visual C++ (version 6/7) bug in SSE compilation;
|
|
thanks to Eddie Yee for his detailed report.
|
|
|
|
Changes from FFTW 3.1 beta 2:
|
|
|
|
* Several minor compilation fixes.
|
|
|
|
* Eliminate FFTW_TIMELIMIT flag and replace fftw_timelimit global with
|
|
fftw_set_timelimit function. Make wisdom work with time-limited plans.
|
|
|
|
Changes from FFTW 3.1 beta 1:
|
|
|
|
* Fixes for creating DLLs under Windows; thanks to John Pavel for his feedback.
|
|
|
|
* Fixed more 64-bit problems, thanks to John Pavel for the bug report.
|
|
|
|
* Further speed improvements for Altivec/VMX.
|
|
|
|
* Further speed improvements for non-square transpositions.
|
|
|
|
* Many minor tweaks.
|
|
|
|
FFTW 3.0.1
|
|
|
|
* Some speed improvements in SIMD code.
|
|
|
|
* --without-cycle-counter option is removed. If no cycle counter is found,
|
|
then the estimator is always used. A --with-slow-timer option is provided
|
|
to force the use of lower-resolution timers.
|
|
|
|
* Several fixes for compilation under Visual C++, with help from Stefane Ruel.
|
|
|
|
* Added x86 cycle counter for Visual C++, with help from Morten Nissov.
|
|
|
|
* Added S390 cycle counter, courtesy of James Treacy.
|
|
|
|
* Added missing static keyword that prevented simultaneous linkage
|
|
of different-precision versions; thanks to Rasmus Larsen for the bug report.
|
|
|
|
* Corrected accidental omission of f77_wisdom.f file; thanks to Alan Watson.
|
|
|
|
* Support -xopenmp flag for SunOS; thanks to John Lou for the bug report.
|
|
|
|
* Compilation with HP/UX cc requires -Wp,-H128000 flag to increase
|
|
preprocessor limits; thanks to Peter Vouras for the bug report.
|
|
|
|
* Removed non-portable use of 'tempfile' in fftw-wisdom-to-conf script;
|
|
thanks to Nicolas Decoster for the patch.
|
|
|
|
* Added 'make smallcheck' target in tests/ directory, at the request of
|
|
James Treacy.
|
|
|
|
FFTW 3.0
|
|
|
|
Major goals of this release:
|
|
|
|
* Speed: often 20% or more faster than FFTW 2.x, even without SIMD (see below).
|
|
|
|
* Complete rewrite, to make it easier to add new algorithms and transforms.
|
|
|
|
* New API, to support more general semantics.
|
|
|
|
Other enhancements:
|
|
|
|
* SIMD acceleration on supporting CPUs (SSE, SSE2, 3DNow!, and AltiVec).
|
|
(With special thanks to Franz Franchetti for many experimental prototypes
|
|
and to Stefan Kral for the vectorizing generator from fftwgel.)
|
|
|
|
* True in-place 1d transforms of large sizes (as well as compressed
|
|
twiddle tables for additional memory/cache savings).
|
|
|
|
* More arbitrary placement of real & imaginary data, e.g. including
|
|
interleaved (as in FFTW 2.x) as well as separate real/imag arrays.
|
|
|
|
* Efficient prime-size transforms of real data.
|
|
|
|
* Multidimensional transforms can operate on a subset of a larger matrix,
|
|
and/or transform selected dimensions of a multidimensional array.
|
|
|
|
* By popular demand, simultaneous linking to double precision (fftw),
|
|
single precision (fftwf), and long-double precision (fftwl) versions
|
|
of FFTW is now supported.
|
|
|
|
* Cycle counters (on all modern CPUs) are exploited to speed planning.
|
|
|
|
* Efficient transforms of real even/odd arrays, a.k.a. discrete
|
|
cosine/sine transforms (types I-IV). (Currently work via pre/post
|
|
processing of real transforms, ala FFTPACK, so are not optimal.)
|
|
|
|
* DHTs (Discrete Hartley Transforms), again via post-processing
|
|
of real transforms (and thus suboptimal, for now).
|
|
|
|
* Support for linking to just those parts of FFTW that you need,
|
|
greatly reducing the size of statically linked programs when
|
|
only a limited set of transform sizes/types are required.
|
|
|
|
* Canonical global wisdom file (/etc/fftw/wisdom) on Unix, along
|
|
with a command-line tool (fftw-wisdom) to generate/update it.
|
|
|
|
* Fortran API can be used with both g77 and non-g77 compilers
|
|
simultaneously.
|
|
|
|
* Multi-threaded version has optional OpenMP support.
|
|
|
|
* Authors' good looks have greatly improved with age.
|
|
|
|
Changes from 3.0beta3:
|
|
|
|
* Separate FMA distribution to better exploit fused multiply-add instructions
|
|
on PowerPC (and possibly other) architectures.
|
|
|
|
* Performance improvements via some inlining tweaks.
|
|
|
|
* fftw_flops now returns double arguments, not int, to avoid overflows
|
|
for large sizes.
|
|
|
|
* Workarounds for automake bugs.
|
|
|
|
Changes from 3.0beta2:
|
|
|
|
* The standard REDFT00/RODFT00 (DCT-I/DST-I) algorithm (used in
|
|
FFTPACK, NR, etcetera) turns out to have poor numerical accuracy, so
|
|
we replaced it with a slower routine that is more accurate.
|
|
|
|
* The guru planner and execute functions now have two variants, one that
|
|
takes complex arguments and one that takes separate real/imag pointers.
|
|
|
|
* Execute and planner routines now automatically align the stack on x86,
|
|
in case the calling program is misaligned.
|
|
|
|
* README file for test program.
|
|
|
|
* Fixed bugs in the combination of SIMD with multi-threaded transforms.
|
|
|
|
* Eliminated internal fftw_threads_init function, which some people were
|
|
calling accidentally instead of the fftw_init_threads API function.
|
|
|
|
* Check for -openmp flag (Intel C compiler) when --enable-openmp is used.
|
|
|
|
* Support AMD x86-64 SIMD and cycle counter.
|
|
|
|
* Support SSE2 intrinsics in forthcoming gcc 3.3.
|
|
|
|
Changes from 3.0beta1:
|
|
|
|
* Faster in-place 1d transforms of non-power-of-two sizes.
|
|
|
|
* SIMD improvements for in-place, multi-dimensional, and/or non-FFTW_PATIENT
|
|
transforms.
|
|
|
|
* Added support for hard-coded DCT/DST/DHT codelets of small sizes; the
|
|
default distribution only includes hard-coded size-8 DCT-II/III, however.
|
|
|
|
* Many minor improvements to the manual. Added section on using the
|
|
codelet generator to customize and enhance FFTW.
|
|
|
|
* The default 'make check' should now only take a few minutes; for more
|
|
strenuous tests (which may take a day or so), do 'cd tests; make bigcheck'.
|
|
|
|
* fftw_print_plan is split into fftw_fprint_plan and fftw_print_plan, where
|
|
the latter uses stdout.
|
|
|
|
* Fixed ability to compile with a C++ compiler.
|
|
|
|
* Fixed support for C99 complex type under glibc.
|
|
|
|
* Fixed problems with alloca under MinGW, AIX.
|
|
|
|
* Workaround for gcc/SPARC bug.
|
|
|
|
* Fixed multi-threaded initialization failure on IRIX due to lack of
|
|
user-accessible PTHREAD_SCOPE_SYSTEM there.
|