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| author |  David Tellenbach <david.tellenbach@me.com> | 2020-07-23 20:55:06 +0000 |
|---|---|---|
| committer |  Rasmus Munk Larsen <rmlarsen@google.com> | 2020-07-23 20:55:06 +0000 |
| commit | c1ffe452fc5b43d7c90fae57b8913497d6c5da0e (patch) | |
| tree | 176e43a0a8ee188a9ea7874eb6e7b66cad2aee73 /test/bfloat16_float.cpp | |
| parent | 2ce2f5198929caab4b41a6ad1b9c93f67d8b9a69 (diff) | |
Fix bfloat16 casts
If we have explicit conversion operators available (C++11) we define
explicit casts from bfloat16 to other types. If not (C++03), we don't
define conversion operators but rely on implicit conversion chains from
bfloat16 over float to other types.
Diffstat (limited to 'test/bfloat16_float.cpp')
| -rw-r--r-- | test/bfloat16_float.cpp | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/test/bfloat16_float.cpp b/test/bfloat16_float.cpp index 11fc31363..94226e999 100644 --- a/test/bfloat16_float.cpp +++ b/test/bfloat16_float.cpp @@ -84,10 +84,20 @@ void test_conversion() VERIFY_IS_EQUAL(bfloat16(false).value, 0x0000); VERIFY_IS_EQUAL(bfloat16(true).value, 0x3f80); - // Conversion to float. + // Conversion to bool + VERIFY_IS_EQUAL(static_cast<bool>(bfloat16(3)), true); + VERIFY_IS_EQUAL(static_cast<bool>(bfloat16(0.33333f)), true); + VERIFY_IS_EQUAL(bfloat16(-0.0), false); + VERIFY_IS_EQUAL(static_cast<bool>(bfloat16(0.0)), false); + + // Explicit conversion to float. VERIFY_IS_EQUAL(static_cast<float>(bfloat16(__bfloat16_raw(0x0000))), 0.0f); VERIFY_IS_EQUAL(static_cast<float>(bfloat16(__bfloat16_raw(0x3f80))), 1.0f); + // Implicit conversion to float + VERIFY_IS_EQUAL(bfloat16(__bfloat16_raw(0x0000)), 0.0f); + VERIFY_IS_EQUAL(bfloat16(__bfloat16_raw(0x3f80)), 1.0f); + // Zero representations VERIFY_IS_EQUAL(bfloat16(0.0f), bfloat16(0.0f)); VERIFY_IS_EQUAL(bfloat16(-0.0f), bfloat16(0.0f)); @@ -101,6 +111,11 @@ void test_conversion() denorm = nextafterf(denorm, 1.0f)) { bfloat16 bf_trunc = Eigen::bfloat16_impl::truncate_to_bfloat16(denorm); VERIFY_IS_EQUAL(static_cast<float>(bf_trunc), 0.0f); + + // Implicit conversion of denormls to bool is correct + VERIFY_IS_EQUAL(static_cast<bool>(bfloat16(denorm)), false); + VERIFY_IS_EQUAL(bfloat16(denorm), false); + if (std::signbit(denorm)) { VERIFY_IS_EQUAL(bf_trunc.value, 0x8000); } else { |