| Age | Commit message (Collapse) | Author | Files | Lines | |
|---|---|---|---|---|---|
| 2022-03-24 | [libatomic] Fix return value in libat_test_and_set | Tom de Vries | 1 | -1/+1 | |
| On nvptx (using a Quadro K2000 with driver 470.103.01) I ran into this: ... FAIL: gcc.dg/atomic/stdatomic-flag-2.c -O1 execution test ... which mimimized to: ... #include <stdatomic.h> atomic_flag a = ATOMIC_FLAG_INIT; int main () { if ((atomic_flag_test_and_set) (&a)) __builtin_abort (); return 0; } ... The atomic_flag_test_and_set is implemented using __atomic_test_and_set_1, which corresponds to the "word-sized compare-and-swap loop" version of libat_test_and_set in libatomic/tas_n.c. The semantics of a test-and-set is that the return value is "true if and only if the previous contents were 'set'". But the code uses: ... return woldval != 0; ... which means it doesn't look only at the byte that was either set or not set, but at the entire word. Fix this by using instead: ... return (woldval & ((UTYPE) ~(UTYPE) 0 << shift)) != 0; ... Tested on nvptx. libatomic/ChangeLog: 2022-03-24 Tom de Vries <tdevries@suse.de> PR target/105011 * tas_n.c (libat_test_and_set): Fix return value. | |||||
| 2022-01-03 | Update copyright years. | Jakub Jelinek | 1 | -1/+1 | |
| 2021-01-04 | Update copyright years. | Jakub Jelinek | 1 | -1/+1 | |
| 2020-01-01 | Update copyright years. | Jakub Jelinek | 1 | -1/+1 | |
| From-SVN: r279813 | |||||
| 2019-01-01 | Update copyright years. | Jakub Jelinek | 1 | -1/+1 | |
| From-SVN: r267494 | |||||
| 2018-01-03 | Update copyright years. | Jakub Jelinek | 1 | -1/+1 | |
| From-SVN: r256169 | |||||
| 2017-01-01 | Update copyright years. | Jakub Jelinek | 1 | -1/+1 | |
| From-SVN: r243994 | |||||
| 2016-01-04 | Update copyright years. | Jakub Jelinek | 1 | -1/+1 | |
| From-SVN: r232055 | |||||
| 2015-01-05 | Update copyright years. | Jakub Jelinek | 1 | -1/+1 | |
| From-SVN: r219188 | |||||
| 2014-01-02 | Update copyright years in libatomic/ | Richard Sandiford | 1 | -1/+1 | |
| From-SVN: r206291 | |||||
| 2013-01-14 | Update copyright years in libatomic. | Richard Sandiford | 1 | -1/+1 | |
| From-SVN: r195164 | |||||
| 2012-05-22 | re PR other/53231 (libatomic/tas_n.c:100:10: error: 'ret' undeclared (first ↵ | John David Anglin | 1 | -2/+2 | |
| use in this function)) PR other/53231 * tas_n.c (libat_test_and_set): Correct return. Remove unused variable. From-SVN: r187783 | |||||
| 2012-05-01 | Add libatomic as a target library. | Richard Henderson | 1 | -0/+115 | |
| From-SVN: r187018 | |||||
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