From 2859cbf31dd209cba93986c68c2ead37610eae66 Mon Sep 17 00:00:00 2001 From: Chris Hammond Date: Thu, 22 Oct 2020 16:24:49 -0400 Subject: Added unit tests for "lerp" functions, and found several type conversion bugs --- unittests/fix16_unittests.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) (limited to 'unittests') diff --git a/unittests/fix16_unittests.c b/unittests/fix16_unittests.c index 9a301a1..b63c25d 100644 --- a/unittests/fix16_unittests.c +++ b/unittests/fix16_unittests.c @@ -330,6 +330,36 @@ int main() TEST(failures == 0); } +#ifndef FIXMATH_NO_64BIT + { + COMMENT("Running linear interpolation test cases"); + + TEST(fix16_lerp8(0, 2, 0) == 0); + TEST(fix16_lerp8(0, 2, 127) == 0); + TEST(fix16_lerp8(0, 2, 128) == 1); + TEST(fix16_lerp8(0, 2, 255) == 1); + TEST(fix16_lerp8(fix16_minimum, fix16_maximum, 0) == fix16_minimum); + TEST(fix16_lerp8(fix16_minimum, fix16_maximum, 255) == (fix16_maximum - (1<<24))); + TEST(fix16_lerp8(-fix16_maximum, fix16_maximum, 128) == 0); + + TEST(fix16_lerp16(0, 2, 0) == 0); + TEST(fix16_lerp16(0, 2, 0x7fff) == 0); + TEST(fix16_lerp16(0, 2, 0x8000) == 1); + TEST(fix16_lerp16(0, 2, 0xffff) == 1); + TEST(fix16_lerp16(fix16_minimum, fix16_maximum, 0) == fix16_minimum); + TEST(fix16_lerp16(fix16_minimum, fix16_maximum, 0xffff) == (fix16_maximum - (1<<16))); + TEST(fix16_lerp16(-fix16_maximum, fix16_maximum, 0x8000) == 0); + + TEST(fix16_lerp32(0, 2, 0) == 0); + TEST(fix16_lerp32(0, 2, 0x7fffffff) == 0); + TEST(fix16_lerp32(0, 2, 0x80000000) == 1); + TEST(fix16_lerp32(0, 2, 0xffffffff) == 1); + TEST(fix16_lerp32(fix16_minimum, fix16_maximum, 0) == fix16_minimum); + TEST(fix16_lerp32(fix16_minimum, fix16_maximum, 0xffffffff) == (fix16_maximum - 1)); + TEST(fix16_lerp32(-fix16_maximum, fix16_maximum, 0x80000000) == 0); + } +#endif + if (status != 0) fprintf(stdout, "\n\nSome tests FAILED!\n"); -- cgit v1.2.3