15.24. __nv_fp8x4_e4m3

struct __nv_fp8x4_e4m3

__nv_fp8x4_e4m3 datatype

This structure implements the datatype for storage and operations on the vector of four fp8 values of e4m3 kind each: with 1 sign, 4 exponent, 1 implicit and 3 explicit mantissa bits. The encoding doesn’t support Infinity. NaNs are limited to 0x7F and 0xFF values.

Public Functions

__nv_fp8x4_e4m3() = default: Constructor by default.

__host__ __device__ inline explicit __nv_fp8x4_e4m3(const __half2 flo, const __half2 fhi): Constructor from a pair of __half2 data type values, relies on __NV_SATFINITE behavior for out-of-range values.

__host__ __device__ inline explicit __nv_fp8x4_e4m3(const __nv_bfloat162 flo, const __nv_bfloat162 fhi): Constructor from a pair of __nv_bfloat162 data type values, relies on __NV_SATFINITE behavior for out-of-range values.

inline explicit __NV_SILENCE_DEPRECATION_BEGIN __host__ __device__ __nv_fp8x4_e4m3(const double4 f): Constructor from double4 vector data type, relies on __NV_SATFINITE behavior for out-of-range values.

inline explicit __NV_SILENCE_DEPRECATION_END __host__ __device__ __nv_fp8x4_e4m3(const double4_16a f): Constructor from double4_16a vector data type, relies on __NV_SATFINITE behavior for out-of-range values.

__host__ __device__ inline explicit __nv_fp8x4_e4m3(const double4_32a f): Constructor from double4_32a vector data type, relies on __NV_SATFINITE behavior for out-of-range values.

__host__ __device__ inline explicit __nv_fp8x4_e4m3(const float4 f): Constructor from float4 vector data type, relies on __NV_SATFINITE behavior for out-of-range values.

__host__ __device__ inline explicit operator float4() const: Conversion operator to float4 vector data type.

Public Members

__nv_fp8x4_storage_t __x: Storage variable contains the vector of four fp8 floating-point data values.