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[libc][math] implement signbit
#96322
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Hi! This issue may be a good introductory issue for people new to working on LLVM. If you would like to work on this issue, your first steps are:
If you have any further questions about this issue, don't hesitate to ask via a comment in the thread below. |
@llvm/issue-subscribers-good-first-issue Author: Nick Desaulniers (paternity leave) (nickdesaulniers)
https://android-review.googlesource.com/c/platform/bionic/+/3141224/1/libc/include/math.h demonstrates that `__builtin_signbit` can be used to implement this macro (or a few fallbacks in case this builtin isn't available). We should use godbolt.org to figure out what compilers and compiler versions support this macro.
I would put these in libc/include/llvm-libc-macros/math-macros.h (there's a comment at the bottom to start a new header for these). It seems that we don't have tests for cc @lntue |
@llvm/issue-subscribers-libc Author: Nick Desaulniers (paternity leave) (nickdesaulniers)
https://android-review.googlesource.com/c/platform/bionic/+/3141224/1/libc/include/math.h demonstrates that `__builtin_signbit` can be used to implement this macro (or a few fallbacks in case this builtin isn't available). We should use godbolt.org to figure out what compilers and compiler versions support this macro.
I would put these in libc/include/llvm-libc-macros/math-macros.h (there's a comment at the bottom to start a new header for these). It seems that we don't have tests for cc @lntue |
https://android-review.googlesource.com/c/platform/bionic/+/3141226/1/tests/math_test.cpp also has a list of other type generic macros we should provide+test.
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I'd like to work on this. |
Hello, I want to work in this issue... Is someone working in this issue now? ._. |
@TejasvOnly and @ChristianWolff1 : Sorry I completely missed the notifications from this issue. Are you still interested in implementing the remaining math function macros? If so please create a github issue for the one that you are going to implement+test, and tag/cc me to the issue. Please let me know if you are interested in other type of functions in libc also. Since @akielaries already sent out a PR for Thanks, |
This PR resolves #96322 and implements the `signbit` macro under a new header `generic-math-macros.h`. This also removed the `TODO` in `math-macros.h` and moves `isfinite`, `isinf`, and `isnan` to the same generic maths header. Finally, a test file `generic-math-macros_test.cpp` that adds coverage to the above 4 macros. Fixes #96322.
This PR resolves llvm#96322 and implements the `signbit` macro under a new header `generic-math-macros.h`. This also removed the `TODO` in `math-macros.h` and moves `isfinite`, `isinf`, and `isnan` to the same generic maths header. Finally, a test file `generic-math-macros_test.cpp` that adds coverage to the above 4 macros. Fixes llvm#96322.
https://android-review.googlesource.com/c/platform/bionic/+/3141224/1/libc/include/math.h demonstrates that
__builtin_signbit
can be used to implement this macro (or a few fallbacks in case this builtin isn't available). We should use godbolt.org to figure out what compilers and compiler versions support this macro.I would put these in libc/include/llvm-libc-macros/math-macros.h (there's a comment at the bottom to start a new header for these).
It seems that we don't have tests for
isfinite
,isinf
, orisnan
macros from our math.h, which is problematic. We should start a new "include" test under libc/test/include (similar to stdbit_test.cpp).cc @lntue
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