# Copyright (c) 2021 HAW Hamburg
#
# This file is subject to the terms and conditions of the GNU Lesser
# General Public License v2.1. See the file LICENSE in the top level
# directory for more details.
#

menuconfig PACKAGE_LIBFIXMATH
    bool "Fixed Point Math package"
    depends on TEST_KCONFIG

if PACKAGE_LIBFIXMATH

config MODULE_LIBFIXMATH
    bool "Fixed Point Math module"

config MODULE_LIBFIXMATH_UNITTESTS
    bool "Fixed Point Math unittests"
    depends on !HAS_ARCH_8BIT
    depends on !HAS_MSP430

menu "Accuracy"

config FIXMATH_NO_ROUNDING
    bool "Disable rounding"
    help
        Say y to disable rounding. Results may round randomly up or down, i.e.
        their accuracy is +-1. Runs slightly faster.

config FIXMATH_NO_OVERFLOW
    bool "Disable overflow detection"
    help
        Say y to disable overflow detection and saturating arithmetic support.
        Overflowing computations will give garbage results. Runs slightly
        faster.

endmenu

menu "Platform"

config FIXMATH_NO_64BIT
    bool "Disable use of uint64_t"
    help
        Say y to disable use of uint64_t in the code. Meant for compilers that
        do not have 64-bit support. Runs the same speed or slightly slower.

config FIXMATH_OPTIMIZE_8BIT
    bool "Optimize for 8-bit architectures"
    default y if HAS_ARCH_8BIT
    help
        Say y to use variants of the functions that are suitable for small 8- and
        16-bit processors. Much faster on those processors, much slower on 32-bit
        processors.

config FIXMATH_NO_CACHE
    bool "Do not use cache"
    default y
    help
        Say y to avoid using cache for exp etc. function results. Uses less RAM,
        runs slightly slower.

endmenu

menu "Algorithms"

config FIXMATH_SIN_LUT
    bool "Use sin look-up table generated by fixsingen"
    help
        Say y to use a look-up table generated by the fixsingen tool from svn,
        it is faster on some devices but the lookup table takes up ~200KiB
        (205376 bytes) in memory and can be slower depending on usage.

config FIXMATH_FAST_SIN
    bool "Fast sin approximation"
    help
        Say y to enable a faster but less accurate approximation of the sin
        function, for code where accuracy isn't as important such as games logic
        or graphics rendering then this is often a worthwhile tradeoff.

endmenu

endif # PACKAGE_LIBFIXMATH