diff options
Diffstat (limited to 'src/corelib/global/qfloat16.h')
| -rw-r--r-- | src/corelib/global/qfloat16.h | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/src/corelib/global/qfloat16.h b/src/corelib/global/qfloat16.h index 651057f8e2..05b88e0e92 100644 --- a/src/corelib/global/qfloat16.h +++ b/src/corelib/global/qfloat16.h @@ -113,10 +113,14 @@ inline Q_REQUIRED_RESULT bool qIsNull(qfloat16 f) Q_DECL_NOTHROW inline int qIntCast(qfloat16 f) Q_DECL_NOTHROW { return int(static_cast<float>(f)); } +QT_WARNING_PUSH +QT_WARNING_DISABLE_CLANG("-Wc99-extensions") inline qfloat16::qfloat16(float f) Q_DECL_NOTHROW { -#if defined(QT_COMPILER_SUPPORTS_F16C) && defined(__F16C__) - b16 = _cvtss_sh(f, 0); +#if defined(QT_COMPILER_SUPPORTS_F16C) && (defined(__F16C__) || defined(__AVX2__)) + __m128 packsingle = _mm_set_ss(f); + __m128i packhalf = _mm_cvtps_ph(packsingle, 0); + b16 = _mm_extract_epi16(packhalf, 0); #elif defined (__ARM_FP16_FORMAT_IEEE) __fp16 f16 = f; memcpy(&b16, &f16, sizeof(quint16)); @@ -127,11 +131,14 @@ inline qfloat16::qfloat16(float f) Q_DECL_NOTHROW + ((u & 0x007fffff) >> shifttable[(u >> 23) & 0x1ff]); #endif } +QT_WARNING_POP inline qfloat16::operator float() const Q_DECL_NOTHROW { -#if defined(QT_COMPILER_SUPPORTS_F16C) && defined(__F16C__) - return _cvtsh_ss(b16); +#if defined(QT_COMPILER_SUPPORTS_F16C) && (defined(__F16C__) || defined(__AVX2__)) + __m128i packhalf = _mm_cvtsi32_si128(b16); + __m128 packsingle = _mm_cvtph_ps(packhalf); + return _mm_cvtss_f32(packsingle); #elif defined (__ARM_FP16_FORMAT_IEEE) __fp16 f16; memcpy(&f16, &b16, sizeof(quint16)); |