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Age	Commit message (Collapse)	Author
2025-10-21	[libc][math] Add tolerance to math tests so that they still work when ↵	lntue
	accurate path is skipped. (#164522)
2025-09-10	[libc] Clean up errno header usage in math tests. (#157898)	Alexey Samsonov
	This is one more follow-up to PR https://github.com/llvm/llvm-project/pull/157517 that cleans up the usage of libc_errno in math unit-tests (non-smoke). It follows the same rule: * if you use libc_errno in code literally, include src/__support/libc_errno.h * if you only rely on errno constants, include hdr/errno_macros.h Several tests for exp/log still retain the direct libc_errno usage, since in some cases they skip doing any validation if the error was raised. But the direct usage of libc_errno is removed from all other cases.
2025-07-23	[libc][NFC] Add stdint.h proxy header to fix dependency issue with ↵	lntue
	<stdint.h> includes. (#150303) https://github.com/llvm/llvm-project/issues/149993
2025-06-11	[libc] Move libc_errno.h to libc/src/__support and make ↵	lntue
	LIBC_ERRNO_MODE_SYSTEM to be header-only. (#143187) This is the first step in preparation for: https://discourse.llvm.org/t/rfc-make-clang-builtin-math-functions-constexpr-with-llvm-libc-to-support-c-23-constexpr-math-functions/86450
2024-07-28	[libc] Create a separate proxy header for math-function-macros.h (#98430)	Nhat Nguyen
	Fix #98393
2024-07-09	[libc][math] Fix overflow shifts for dyadic floats and add skip accuracy ↵	lntue
	option for expm1. (#98048) The following errors were reported by Paul Zimmerman: ``` expm1 Running worst cases check in --rndn mode... FAIL x=0x1.c3b93d3b25c91p+8 ref=0x1.9fb21849affd1p+651 z=0x1.9f921849affd1p+651 Running worst cases check in --rndz mode... FAIL x=0x1.d6479eba7c971p+8 ref=0x1.62a88613629b5p+678 z=0x1.62a886135e9b5p+678 Running worst cases check in --rndu mode... FAIL x=0x1.1f0da93354198p+7 ref=0x1.0bd73b73fc74dp+207 z=0x1.0bd73b73fc74cp+207 Running worst cases check in --rndd mode... FAIL x=0x1.93b3037166891p+8 ref=0x1.554f3a5c4535cp+582 z=0x1.554f3a5c4535bp+582 ``` ``` tan Running worst cases check in --rndn mode... FAIL x=0x1.00452f0e0134dp-13 ref=0x1.00452f2367da9p-13 z=0x1.00452f2367daap-13 Running worst cases check in --rndz mode... FAIL x=0x1.89f0f5241255bp-2 ref=0x1.9e997dd861117p-2 z=0x1.9e997dd861118p-2 FAIL x=0x1.045457ae3994p+5 ref=0x1.0c06941768ef3p+1 z=0x1.0c06941768ef4p+1 ```
2024-04-05	[libc] Add proxy header math_macros.h. (#87598)	lntue
	Context: https://github.com/llvm/llvm-project/pull/87017 - Add proxy header `libc/hdr/math_macros.h` that will: - include `<math.h>` in overlay mode, - include `"include/llvm-libc-macros/math-macros.h"` in full build mode. - Its corresponding CMake target `libc.hdr.math_macros` will only depend on `libc.include.math` and `libc.include.llvm-libc-macros.math_macros` in full build mode. - Replace all `#include "include/llvm-libc-macros/math-macros.h"` with `#include "hdr/math_macros.h"`. - Add dependency to `libc.hdr.math_macros` CMake target when using `add_fp_unittest`. - Update the remaining dependency. - Update bazel overlay: add `libc:hdr_math_macros` target, and replacing all dependency on `libc:llvm_libc_macros_math_macros` with `libc:hdr_math_macros`.
2024-03-18	[libc] Remove direct math.h includes (#85324)	Michael Jones
	Reland of #84991 A downstream overlay mode user ran into issues with the isnan macro not working in our sources with a specific libc configuration. This patch replaces the last direct includes of math.h with our internal math_macros.h, along with the necessary build system changes.
2024-02-06	[libc] Move libc_errno inside of LIBC_NAMESPACE (#80774)	michaelrj-google
	Having libc_errno outside of the namespace causes versioning issues when trying to link the tests against LLVM-libc. Most of this patch is just moving libc_errno inside the namespace in tests. This isn't necessary in the function implementations since those are already inside the namespace.
2024-01-23	[libc][NFC] Remove `FPBits` cast operator (#79142)	Guillaume Chatelet
	The semantics for casting can range from "bitcast" (same representation) to "different representation", to "type promotion". Here we remove the cast operator and force usage of `get_val` as the only function to get the floating point value, making the intent clearer and more consistent.
2023-10-19	[libc][math][NFC] Remove global scope constants declaration in math tests ↵	lntue
	(#69558) Clean up usage of `DECLARE_SPECIAL_CONSTANTS` in global scope.
2023-09-28	[libc][math] Implement double precision expm1 function correctly rounded for ↵	lntue
	all rounding modes. (#67048) Implementing expm1 function for double precision based on exp function algorithm: - Reduced x = log2(e) * (hi + mid1 + mid2) + lo, where: * hi is an integer * mid1 * 2^-6 is an integer * mid2 * 2^-12 is an integer * \|lo\| < 2^-13 + 2^-30 - Then exp(x) - 1 = 2^hi * 2^mid1 * 2^mid2 * exp(lo) - 1 ~ 2^hi * (2^mid1 * 2^mid2 * (1 + lo * P(lo)) - 2^(-hi) ) - We evaluate fast pass with P(lo) is a degree-3 Taylor polynomial of (e^lo - 1) / lo in double precision - If the Ziv accuracy test fails, we use degree-6 Taylor polynomial of (e^lo - 1) / lo in double double precision - If the Ziv accuracy test still fails, we re-evaluate everything in 128-bit precision.