| config BR2_PACKAGE_FFTW |
| bool "fftw" |
| help |
| Library for computing Fast Fourier Transforms. |
| |
| This library computes Fast Fourier Transforms (FFT) in one |
| or more dimensions. It is extremely fast. This package |
| contains the shared library version of the fftw libraries in |
| double precision. |
| |
| http://www.fftw.org |
| |
| if BR2_PACKAGE_FFTW |
| |
| config BR2_PACKAGE_FFTW_USE_SSE |
| bool |
| |
| config BR2_PACKAGE_FFTW_USE_SSE2 |
| bool |
| |
| config BR2_PACKAGE_FFTW_USE_NEON |
| bool |
| |
| choice |
| prompt "fftw precision" |
| default BR2_PACKAGE_FFTW_PRECISION_DOUBLE |
| help |
| Selects fftw precision |
| |
| config BR2_PACKAGE_FFTW_PRECISION_SINGLE |
| bool "single" |
| select BR2_PACKAGE_FFTW_USE_SSE if BR2_X86_CPU_HAS_SSE |
| select BR2_PACKAGE_FFTW_USE_SSE2 if BR2_X86_CPU_HAS_SSE2 |
| select BR2_PACKAGE_FFTW_USE_NEON if BR2_ARM_CPU_HAS_NEON && !BR2_ARM_SOFT_FLOAT |
| help |
| Compile fftw in single precision, i.e. use 'float' for floating |
| point type. |
| |
| config BR2_PACKAGE_FFTW_PRECISION_DOUBLE |
| bool "double" |
| select BR2_PACKAGE_FFTW_USE_SSE2 if BR2_X86_CPU_HAS_SSE2 |
| help |
| Compile fftw in double precision (the default), i.e. use 'double' |
| for floating point type. |
| |
| config BR2_PACKAGE_FFTW_PRECISION_LONG_DOUBLE |
| bool "long double" |
| # long-double precision require long-double trigonometric routines |
| depends on !(BR2_TOOLCHAIN_BUILDROOT_UCLIBC && \ |
| (BR2_arm || BR2_mips || BR2_mipsel)) |
| help |
| Compile fftw in long double precision, i.e. use 'long double' |
| for floating point type. |
| |
| config BR2_PACKAGE_FFTW_PRECISION_QUAD |
| bool "quad" |
| # quad-precision needs to have a gcc with libquadmath |
| depends on (BR2_i386 || BR2_x86_64) && BR2_USE_WCHAR |
| help |
| Compile fftw in quadruple precision, i.e. use '__float128' for |
| floating point type. |
| |
| endchoice |
| |
| config BR2_PACKAGE_FFTW_FAST |
| bool "optimise for speed over accuracy" |
| help |
| Optimise for fast math functions, at the expense of accuracy. |
| |
| Say 'y' if you need speed and can live with inaccuracies in |
| the results. Say 'n' (the default) if accuracy is of utmost |
| importance. |
| |
| This basically uses gcc's -Ofast optimisation level, which in |
| turn is basically using gcc's -ffast-math. See the gcc manual |
| for what this means. |
| |
| endif |
