diff options
Diffstat (limited to 'src/corelib/global/qfloat16.h')
| -rw-r--r-- | src/corelib/global/qfloat16.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/corelib/global/qfloat16.h b/src/corelib/global/qfloat16.h index 67c062d349..8fd2f212af 100644 --- a/src/corelib/global/qfloat16.h +++ b/src/corelib/global/qfloat16.h @@ -44,6 +44,10 @@ #include <QtCore/qmetatype.h> #include <string.h> +#if defined __F16C__ +#include <immintrin.h> +#endif + QT_BEGIN_NAMESPACE #if 0 @@ -111,19 +115,34 @@ inline int qIntCast(qfloat16 f) Q_DECL_NOTHROW inline qfloat16::qfloat16(float f) Q_DECL_NOTHROW { +#if defined(QT_COMPILER_SUPPORTS_F16C) && defined(__F16C__) + b16 = _cvtss_sh(f, 0); +#elif defined (__ARM_FP16_FORMAT_IEEE) + __fp16 f16 = f; + memcpy(&b16, &f16, sizeof(quint16)); +#else quint32 u; memcpy(&u, &f, sizeof(quint32)); b16 = basetable[(u >> 23) & 0x1ff] + ((u & 0x007fffff) >> shifttable[(u >> 23) & 0x1ff]); +#endif } inline qfloat16::operator float() const Q_DECL_NOTHROW { +#if defined(QT_COMPILER_SUPPORTS_F16C) && defined(__F16C__) + return _cvtsh_ss(b16); +#elif defined (__ARM_FP16_FORMAT_IEEE) + __fp16 f16; + memcpy(&f16, &b16, sizeof(quint16)); + return f16; +#else quint32 u = mantissatable[offsettable[b16 >> 10] + (b16 & 0x3ff)] + exponenttable[b16 >> 10]; float f; memcpy(&f, &u, sizeof(quint32)); return f; +#endif } inline qfloat16::operator double() const Q_DECL_NOTHROW |