Improved accuracy of libm #553

ZERICO2005 · 2025-03-14T21:28:39Z

Changes:

added header_test.c and header_test.cpp to test for conflicts
documented the ULP or relative precision of functions
added 3-argument hypot to C++, it can also be used in C through <tgmath.h>
implemented expl logl atanl atan2l asinhl acoshl atanhl erfl erfcl
optimized various float32 math functions
__float32_constants.h and __float64_constants.h were added to maintain consistency.
Added basic tests to for each math function (tests a positive and negative input, and sees if the result is "accurate" enough (within 512ulp))

…cumented precision for exp/log functions

ZERICO2005 added 6 commits March 14, 2025 12:21

Optimized sqrtf, added expl and logl, added constants for f32/f64, do…

2bfab3d

…cumented precision for exp/log functions

Added atanl and atan2l, and did some formatting on atanf and atan2f

70074b2

Improved/formatted the hyperbolic and inverse trig functions

b369728

improved erf and erfc, and formatted lgammaf and tgammaf

32e0569

Added hypot3 and header conflict tests

7bd7231

Added tests for math functions and fixed bugs

6d4d2a4

adriweb merged commit c71b7b0 into master Mar 14, 2025
9 checks passed

adriweb deleted the pr/libm_improvements branch March 14, 2025 21:36

Provide feedback