diff options
| author |  David Tellenbach <david.tellenbach@me.com> | 2020-10-28 20:15:09 +0000 |
|---|---|---|
| committer | David Tellenbach <david.tellenbach@me.com> | 2020-10-28 20:15:09 +0000 |
| commit | e265f7ed8e59c26e15f2c35162c6b8da1c5d594f (patch) | |
| tree | 09f9696465ca75ecfdaeccda88358f397616042d /Eigen/src/Core/util/Macros.h | |
| parent | a725a3233c98185eb3e5db6186aea3a906b8411f (diff) | |
Add support for Armv8.2-a __fp16
Armv8.2-a provides a native half-precision floating point (__fp16 aka.
float16_t). This patch introduces
* __fp16 as underlying type of Eigen::half if this type is available
* the packet types Packet4hf and Packet8hf representing float16x4_t and
float16x8_t respectively
* packet-math for the above packets with corresponding scalar type Eigen::half
The packet-math functionality has been implemented by Ashutosh Sharma
<ashutosh.sharma@amperecomputing.com>.
This closes #1940.
Diffstat (limited to 'Eigen/src/Core/util/Macros.h')
| -rw-r--r-- | Eigen/src/Core/util/Macros.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/Eigen/src/Core/util/Macros.h b/Eigen/src/Core/util/Macros.h index 2d47c075c..5023a6332 100644 --- a/Eigen/src/Core/util/Macros.h +++ b/Eigen/src/Core/util/Macros.h @@ -258,12 +258,47 @@ #define EIGEN_ARCH_ARM64 0 #endif +/// \internal EIGEN_ARCH_ARM_OR_ARM64 set to 1 if the architecture is ARM or ARM64 #if EIGEN_ARCH_ARM || EIGEN_ARCH_ARM64 #define EIGEN_ARCH_ARM_OR_ARM64 1 #else #define EIGEN_ARCH_ARM_OR_ARM64 0 #endif +/// \internal EIGEN_HAS_ARM64_FP16 set to 1 if the architecture provides an IEEE +/// compliant Arm fp16 type +#if EIGEN_ARCH_ARM64 + #ifndef EIGEN_HAS_ARM64_FP16 + #if defined(__ARM_FP16_FORMAT_IEEE) + #define EIGEN_HAS_ARM64_FP16 1 + #else + #define EIGEN_HAS_ARM64_FP16 0 + #endif + #endif +#endif + +/// \internal EIGEN_HAS_ARM64_FP16_VECTOR_ARITHMETIC set to 1 if the architecture +/// supports Neon vector intrinsics for fp16. +#if EIGEN_ARCH_ARM64 + #ifndef EIGEN_HAS_ARM64_FP16_VECTOR_ARITHMETIC + #if defined(__ARM_FEATURE_FP16_VECTOR_ARITHMETIC) + #define EIGEN_HAS_ARM64_FP16_VECTOR_ARITHMETIC 1 + #else + #define EIGEN_HAS_ARM64_FP16_VECTOR_ARITHMETIC 0 + #endif + #endif +#endif + +/// \internal EIGEN_HAS_ARM64_FP16_SCALAR_ARITHMETIC set to 1 if the architecture +/// supports Neon scalar intrinsics for fp16. +#if EIGEN_ARCH_ARM64 + #ifndef EIGEN_HAS_ARM64_FP16_SCALAR_ARITHMETIC + #if defined(__ARM_FEATURE_FP16_SCALAR_ARITHMETIC) + #define EIGEN_HAS_ARM64_FP16_SCALAR_ARITHMETIC 1 + #endif + #endif +#endif + /// \internal EIGEN_ARCH_MIPS set to 1 if the architecture is MIPS #if defined(__mips__) || defined(__mips) #define EIGEN_ARCH_MIPS 1 |