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* Android: Fix warning for __fp16BogDan Vatra2017-08-171-1/+1
| | | | | Change-Id: I65cd64dfc0ed357555e8b5276109303377a67e0e Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
* Eliminate ambiguous casts involving qfloat16Glen Mabey2017-05-071-12/+0
| | | | | | | | | | | | The operator double() and operator long double() members of qfloat16 are causing cast ambiguities. This removes them, leaving only operator float() which seems to be adequate. Also, additional arithmetic operator tests were added which without this removal fail to compile. Change-Id: Id52a101b318fd754969b3de13c1e528d0aac2387 Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
* Move Q_REQUIRED_RESULT to its correct positionThiago Macieira2017-04-201-8/+8
| | | | | | | | | | | That's before the return type or static, inline, constexpr or such keywords (if any). Perl Script: s/^(\s+)(.*) Q_REQUIRED_RESULT(;)?(\s*\/\/.*)?$/\1Q_REQUIRED_RESULT \2\3\4/ Change-Id: I7814054a102a407d876ffffd14b6a16182f159e2 Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
* qfloat16: Fix GCC warning about use of old-style castThiago Macieira2017-04-151-0/+1
| | | | | | | | | _mm_cvtps_ph is usually defined as a macro: qfloat16.h:122:37: error: use of old-style cast [-Werror=old-style-cast] Change-Id: Icd0e0d4b27cb4e5eb892fffd14b516ec47826c0c Reviewed-by: Ville Voutilainen <ville.voutilainen@qt.io> Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
* Fix detection of F16C for the Intel compiler (again) and Visual StudioThiago Macieira2017-04-061-2/+2
| | | | | | | | | | | | | | | | | | | | | | | Neither the Intel compiler nor Visual C++ have a dedicated switch to enable F16C support, like GCC and Clang do. So we used the AVX switch for that in commit 8241d51f7049d48912ce25fbd49ef4d22c58e340, as it was the closest, lowest denominator. That was incorrect and insufficient. The Intel compiler silently miscompiles the intrinsics with -xAVX, making calls to out-of-line functions like _mm_cvtps_ph, which don't exist. So we actually have to use AVX2 support to generate correct code. That might be a problem later, since Ivy Bridge supports F16C but not AVX2. Visual C++ is able to generate F16C code with just -arch:AVX. Either way, since there's no dedicated command-line switch, there's also no dedicated preprocessor macro. We're using __AVX2__ for both compilers, as that's a sufficient condition to indicate a processor that supports F16C. Change-Id: I27b55fdf514247549455fffd14b205b8d8b86da7 Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
* f16c: Use the packed intrinsics instead of scalar onesThiago Macieira2017-04-061-2/+6
| | | | | | | | | MSVC, Apple's Clang and Clang prior to 3.9 do not recognize _cvtss_sh and _cvtsh_ss. So expand the operation to use directly the packed intrinsics. Change-Id: I27b55fdf514247549455fffd14b2046fd638593d Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
* qfloat16: suppress warning caused by Clang macro we usedThiago Macieira2017-04-021-0/+3
| | | | | | | | | | | | | Clang implements the _cvtss_sh intrinsic by way of a macro, which uses a C99 extension and that's not allowed in C++ mode: float16.h:119:11: error: compound literals are a C99-specific feature [-Werror,-Wc99-extensions] /usr/bin/../lib64/clang/3.9.1/include/f16cintrin.h:76:55: note: expanded from macro '_cvtss_sh' Reported at https://bugs.llvm.org/show_bug.cgi?id=32491. Change-Id: I27b55fdf514247549455fffd14b170df75dd4e1f Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
* Suppress -Wfloat-equal when defining float16 equality operatorsUlf Hermann2017-03-131-0/+6
| | | | | Change-Id: Ie30fa13eb5f8eb44f0c9c21e9483c8aba40cec02 Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
* Use native support for fp16 where availableAllan Sandfeld Jensen2017-02-161-0/+19
| | | | | | | | | | Use F16C or ARM FP16 if available at compile time. Configure check added because older clang compilers have F16C defines and flags but not all the intrinsics. Change-Id: I71f358b8fd003e70ab8fcf35097414591e485112 Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
* Don't include qfloat.h in the QtCore master includeThiago Macieira2017-02-091-0/+1
| | | | | | | | | | | We have observed that MSVC 2013 gets lost with the overloads that this header adds, causing compilation bugs. This is believed to be a compiler bug, but it's not something we can work around. Task-number: QTBUG-58555 Change-Id: I536c32a88bff44dab37afffd14a1bad1d31dc16d Reviewed-by: Simon Hausmann <simon.hausmann@qt.io> Reviewed-by: Glen Mabey <Glen.Mabey@swri.org>
* New qfloat16 classGlen Mabey2017-01-311-0/+225
This constitutes a fairly complete submission of an entirely new floating point type which conforms to IEEE 754 as a 16-bit storage class. Conversion between qfloat16 and float is currently performed through a sequence of lookup tables. Global-level functions qRound(), qRound64(), qFuzzyCompare(), qFuzzyIsNull(), and qIsNull() each with a qfloat16 parameter have been included for completeness. [ChangeLog][QtCore] Added new qfloat16 class. Change-Id: Ia52eb27846965c14f8140c00faf5ba33c9443976 Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
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