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| author | Sergey B Kirpichev <skirpichev@gmail.com> | 2024-08-04 08:53:17 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-08-04 08:53:17 (GMT) |
| commit | 3462a80d2cf37a63fe43f46f64a8c9823f84531d (patch) | |
| tree | c6870dfefae1447a500abc164c4714f86ba17d79 | |
| parent | 151934a324789c58cca9c7bbd6753d735454df5a (diff) | |
| download | cpython-3462a80d2cf37a63fe43f46f64a8c9823f84531d.zip cpython-3462a80d2cf37a63fe43f46f64a8c9823f84531d.tar.gz cpython-3462a80d2cf37a63fe43f46f64a8c9823f84531d.tar.bz2 | |
gh-121889: cmath.acosh(0+nanj) returns nan+pi/2j (#121892)
As per C11 DR#471 (adjusted resolution accepted for C17), cacosh (0 +
iNaN) should return NaN ± i pi/2, not NaN + iNaN. This patch
fixes cmath's code to do same.
| -rw-r--r-- | Lib/test/mathdata/cmath_testcases.txt | 4 | ||||
| -rw-r--r-- | Misc/NEWS.d/next/Library/2024-07-17-09-23-03.gh-issue-121889.6se9jS.rst | 1 | ||||
| -rw-r--r-- | Modules/cmathmodule.c | 4 |
3 files changed, 5 insertions, 4 deletions
diff --git a/Lib/test/mathdata/cmath_testcases.txt b/Lib/test/mathdata/cmath_testcases.txt index 0165e17..0c0d2d7 100644 --- a/Lib/test/mathdata/cmath_testcases.txt +++ b/Lib/test/mathdata/cmath_testcases.txt @@ -371,9 +371,9 @@ acosh1002 acosh 0.0 inf -> inf 1.5707963267948966 acosh1003 acosh 2.3 inf -> inf 1.5707963267948966 acosh1004 acosh -0.0 inf -> inf 1.5707963267948966 acosh1005 acosh -2.3 inf -> inf 1.5707963267948966 -acosh1006 acosh 0.0 nan -> nan nan +acosh1006 acosh 0.0 nan -> nan 1.5707963267948966 ignore-imag-sign acosh1007 acosh 2.3 nan -> nan nan -acosh1008 acosh -0.0 nan -> nan nan +acosh1008 acosh -0.0 nan -> nan 1.5707963267948966 ignore-imag-sign acosh1009 acosh -2.3 nan -> nan nan acosh1010 acosh -inf 0.0 -> inf 3.1415926535897931 acosh1011 acosh -inf 2.3 -> inf 3.1415926535897931 diff --git a/Misc/NEWS.d/next/Library/2024-07-17-09-23-03.gh-issue-121889.6se9jS.rst b/Misc/NEWS.d/next/Library/2024-07-17-09-23-03.gh-issue-121889.6se9jS.rst new file mode 100644 index 0000000..a7babe0 --- /dev/null +++ b/Misc/NEWS.d/next/Library/2024-07-17-09-23-03.gh-issue-121889.6se9jS.rst @@ -0,0 +1 @@ +Adjusts ``cmath.acosh(complex('0+nanj'))`` for recent C standards. diff --git a/Modules/cmathmodule.c b/Modules/cmathmodule.c index bf86a21..16ac663 100644 --- a/Modules/cmathmodule.c +++ b/Modules/cmathmodule.c @@ -1259,8 +1259,8 @@ cmath_exec(PyObject *mod) INIT_SPECIAL_VALUES(acosh_special_values, { C(INF,-P34) C(INF,-P) C(INF,-P) C(INF,P) C(INF,P) C(INF,P34) C(INF,N) C(INF,-P12) C(U,U) C(U,U) C(U,U) C(U,U) C(INF,P12) C(N,N) - C(INF,-P12) C(U,U) C(0.,-P12) C(0.,P12) C(U,U) C(INF,P12) C(N,N) - C(INF,-P12) C(U,U) C(0.,-P12) C(0.,P12) C(U,U) C(INF,P12) C(N,N) + C(INF,-P12) C(U,U) C(0.,-P12) C(0.,P12) C(U,U) C(INF,P12) C(N,P12) + C(INF,-P12) C(U,U) C(0.,-P12) C(0.,P12) C(U,U) C(INF,P12) C(N,P12) C(INF,-P12) C(U,U) C(U,U) C(U,U) C(U,U) C(INF,P12) C(N,N) C(INF,-P14) C(INF,-0.) C(INF,-0.) C(INF,0.) C(INF,0.) C(INF,P14) C(INF,N) C(INF,N) C(N,N) C(N,N) C(N,N) C(N,N) C(INF,N) C(N,N) |