diff options
| author | Allan Sandfeld Jensen <allan.jensen@qt.io> | 2017-10-16 13:54:38 +0200 |
|---|---|---|
| committer | Thiago Macieira <thiago.macieira@intel.com> | 2017-11-21 20:01:23 +0000 |
| commit | b8e352ad378ce4ef7a517971533b02ec9c3768cb (patch) | |
| tree | 1edc11dddc8784285c0ee1914e7f33d2569e6d7e /src/corelib/global/qfloat16.h | |
| parent | 0ac2dca977ecc4020f51af57908a2640d00bcd9e (diff) | |
Add functions for fast bulk conversion of qfloat16
Both ARM and x86 can convert fp16 much faster in bulk than one at a
time. This also enables hardware accelerated conversion on x86, when
F16C isn't unconditionally available at compile time.
This code is implemented in C to ensure that there's no leakage of
inline symbols from the .obj file that was compiled by Visual Studio
with AVX support. Unfortunately, simd.prf uses $(CXX) instead of $(CC)
for all its sources, which means the file gets interpreted as C++ by
g++, clang++ and icpc. Those compilers at least don't leak any symbols.
Done-with: Thiago Macieira <thiago.macieira@intel.com>
Change-Id: I9d26d99e83392861fb09564e0e8e8d76cd8483b3
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Diffstat (limited to 'src/corelib/global/qfloat16.h')
| -rw-r--r-- | src/corelib/global/qfloat16.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/corelib/global/qfloat16.h b/src/corelib/global/qfloat16.h index 10598adb1d..5855784f32 100644 --- a/src/corelib/global/qfloat16.h +++ b/src/corelib/global/qfloat16.h @@ -79,6 +79,9 @@ private: Q_DECLARE_TYPEINFO(qfloat16, Q_PRIMITIVE_TYPE); +Q_CORE_EXPORT void qFloatToFloat16(qfloat16 *, const float *, qssize_t length) Q_DECL_NOTHROW; +Q_CORE_EXPORT void qFloatFromFloat16(float *, const qfloat16 *, qssize_t length) Q_DECL_NOTHROW; + Q_REQUIRED_RESULT Q_CORE_EXPORT bool qIsInf(qfloat16 f) Q_DECL_NOTHROW; // complements qnumeric.h Q_REQUIRED_RESULT Q_CORE_EXPORT bool qIsNaN(qfloat16 f) Q_DECL_NOTHROW; // complements qnumeric.h Q_REQUIRED_RESULT Q_CORE_EXPORT bool qIsFinite(qfloat16 f) Q_DECL_NOTHROW; // complements qnumeric.h |