From c6f431bba531bac3212b66069cf0f9718edf0132 Mon Sep 17 00:00:00 2001 From: Jonathan Wakely Date: Thu, 2 Jul 2020 17:11:10 +0000 Subject: [PATCH] libstdc++: Fix atomic tests (PR 91153, PR 93224) These tests fail with AIX double double. Use different floating point values that behave less surprisingly. libstdc++-v3/ChangeLog: PR libstdc++/91153 PR target/93224 * testsuite/29_atomics/atomic_float/1.cc: Use different values for tests. * testsuite/29_atomics/atomic_ref/float.cc: Likewise. --- .../testsuite/29_atomics/atomic_float/1.cc | 74 ++++++++++--------- .../testsuite/29_atomics/atomic_ref/float.cc | 39 +++++----- 2 files changed, 58 insertions(+), 55 deletions(-) diff --git a/libstdc++-v3/testsuite/29_atomics/atomic_float/1.cc b/libstdc++-v3/testsuite/29_atomics/atomic_float/1.cc index cf80c84bbb9..a38b040ee8f 100644 --- a/libstdc++-v3/testsuite/29_atomics/atomic_float/1.cc +++ b/libstdc++-v3/testsuite/29_atomics/atomic_float/1.cc @@ -453,27 +453,28 @@ test03() ok = a1.compare_exchange_strong(expected, 3.2l, mo); VERIFY( !ok && a1.load() == 2.56l && expected == 2.56l ); - f0 = a0.fetch_add(1.2l); - VERIFY( f0 == 12.8l ); - VERIFY( a0 == 14.0l ); - f1 = a1.fetch_add(2.4l, mo); - VERIFY( f1 == 2.56l ); - VERIFY( a1 == 4.96l ); + a1 = a0 = 0.5l; + f0 = a0.fetch_add(0.25l); + VERIFY( f0 == 0.5l ); + VERIFY( a0 == 0.75l ); + f1 = a1.fetch_add(0.25l, mo); + VERIFY( f1 == 0.5l ); + VERIFY( a1 == 0.75l ); - f0 = a0.fetch_sub(1.2l); - VERIFY( f0 == 14.0l ); - VERIFY( a0 == 12.8l ); - f1 = a1.fetch_sub(3.5l, mo); - VERIFY( f1 == 4.96l ); - VERIFY( a1 == 1.46l ); + f0 = a0.fetch_sub(0.5l); + VERIFY( f0 == 0.75l ); + VERIFY( a0 == 0.25l ); + f1 = a1.fetch_sub(0.5l, mo); + VERIFY( f1 == 0.75l ); + VERIFY( a1 == 0.25l ); - f0 = a0 += 1.2l; - VERIFY( f0 == 14.0l ); - VERIFY( a0 == 14.0l ); + f0 = a0 += 0.75l; + VERIFY( f0 == 1.0l ); + VERIFY( a0 == 1.0l ); - f0 = a0 -= 0.8l; - VERIFY( f0 == 13.2l ); - VERIFY( a0 == 13.2l ); + f0 = a0 -= 0.5l; + VERIFY( f0 == 0.5l ); + VERIFY( a0 == 0.5l ); } // Repeat for volatile std::atomic @@ -540,27 +541,28 @@ test03() ok = a1.compare_exchange_strong(expected, 3.2l, mo); VERIFY( !ok && a1.load() == 2.56l && expected == 2.56l ); - f0 = a0.fetch_add(1.2l); - VERIFY( f0 == 12.8l ); - VERIFY( a0 == 14.0l ); - f1 = a1.fetch_add(2.4l, mo); - VERIFY( f1 == 2.56l ); - VERIFY( a1 == 4.96l ); + a1 = a0 = 0.5l; + f0 = a0.fetch_add(0.25l); + VERIFY( f0 == 0.5l ); + VERIFY( a0 == 0.75l ); + f1 = a1.fetch_add(0.25l, mo); + VERIFY( f1 == 0.5l ); + VERIFY( a1 == 0.75l ); - f0 = a0.fetch_sub(1.2l); - VERIFY( f0 == 14.0l ); - VERIFY( a0 == 12.8l ); - f1 = a1.fetch_sub(3.5l, mo); - VERIFY( f1 == 4.96l ); - VERIFY( a1 == 1.46l ); + f0 = a0.fetch_sub(0.5l); + VERIFY( f0 == 0.75l ); + VERIFY( a0 == 0.25l ); + f1 = a1.fetch_sub(0.5l, mo); + VERIFY( f1 == 0.75l ); + VERIFY( a1 == 0.25l ); - f0 = a0 += 1.2l; - VERIFY( f0 == 14.0l ); - VERIFY( a0 == 14.0l ); + f0 = a0 += 0.75l; + VERIFY( f0 == 1.0l ); + VERIFY( a0 == 1.0l ); - f0 = a0 -= 0.8l; - VERIFY( f0 == 13.2l ); - VERIFY( a0 == 13.2l ); + f0 = a0 -= 0.5l; + VERIFY( f0 == 0.5l ); + VERIFY( a0 == 0.5l ); } } diff --git a/libstdc++-v3/testsuite/29_atomics/atomic_ref/float.cc b/libstdc++-v3/testsuite/29_atomics/atomic_ref/float.cc index 0aee9ceedcf..4726a14f9ca 100644 --- a/libstdc++-v3/testsuite/29_atomics/atomic_ref/float.cc +++ b/libstdc++-v3/testsuite/29_atomics/atomic_ref/float.cc @@ -267,31 +267,32 @@ test03() ok = a.compare_exchange_strong(expected, 6.4l, mo); VERIFY( !ok && a.load() == 204.8l && expected == 204.8l ); - v = a.fetch_add(3.2l); - VERIFY( v == 204.8l ); - VERIFY( a == 208.0l ); - v = a.fetch_add(-8.5l, mo); - VERIFY( v == 208.0l ); - VERIFY( a == 199.5l ); + a = 0.5l; + v = a.fetch_add(0.5l); + VERIFY( v == 0.5l ); + VERIFY( a == 1.0l ); + v = a.fetch_add(-0.2l, mo); + VERIFY( v == 1.0l ); + VERIFY( a == 0.8l ); - v = a.fetch_sub(109.5l); - VERIFY( v == 199.5l ); - VERIFY( a == 90.0l ); - v = a.fetch_sub(2, mo); - VERIFY( v == 90.0l ); - VERIFY( a == 88.0l ); + v = a.fetch_sub(0.4l); + VERIFY( v == 0.8l ); + VERIFY( a == 0.4l ); + v = a.fetch_sub(-0.4l, mo); + VERIFY( v == 0.4l ); + VERIFY( a == 0.8l ); - v = a += 5.0l; - VERIFY( v == 93.0l ); - VERIFY( a == 93.0l ); + v = a += .8l; + VERIFY( v == 1.6l ); + VERIFY( a == 1.6l ); - v = a -= 6.5l; - VERIFY( v == 86.5l ); - VERIFY( a == 86.5l ); + v = a -= 0.6l; + VERIFY( v == 1.0l ); + VERIFY( a == 1.0l ); } if constexpr (std::atomic_ref::is_always_lock_free) - VERIFY( value == 86.5l ); + VERIFY( value == 1.0l ); } void