3 Commits

Author	SHA1	Message	Date
Michael Jones	04a9c62554	[libc] move stdlib and stdio to new errno pattern ... Fixes https://github.com/llvm/llvm-project/issues/61071 Reviewed By: sivachandra Differential Revision: https://reviews.llvm.org/D145191	2023-03-03 11:15:36 -08:00
Michael Jones	cb3c41c285	[libc] Refactor string to float return values ... The internal implementation of the string to float function previously used pointer arguments for returning several values. Additionally it set errno in several unexpected places. Now all of that goes through return structs. For readability I also moved the function away from raw pointer arithmetic towards proper indexing. I also added support for rounding modes. Reviewed By: sivachandra Differential Revision: https://reviews.llvm.org/D144597	2023-02-28 10:50:43 -08:00
Michael Jones	87c016078a	[libc] add atof, strtof and strtod ... Add the string to floating point conversion functions. Long doubles aren't supported yet, but floats and doubles are. The primary algorithm used is the Eisel-Lemire ParseNumberF64 algorithm, with the Simple Decimal Conversion algorithm as backup. Links for more information on the algorithms: Number Parsing at a Gigabyte per Second, Software: Practice and Experience 51 (8), 2021 (https://arxiv.org/abs/2101.11408) https://nigeltao.github.io/blog/2020/eisel-lemire.html https://nigeltao.github.io/blog/2020/parse-number-f64-simple.html Differential Revision: https://reviews.llvm.org/D109261	2021-10-18 16:10:03 -07:00