93 lines
2.1 KiB
C++
93 lines
2.1 KiB
C++
#pragma once
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#ifndef FP16_BITCASTS_H
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#define FP16_BITCASTS_H
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#if defined(__cplusplus) && (__cplusplus >= 201103L)
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#include <cstdint>
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#elif !defined(__OPENCL_VERSION__)
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#include <stdint.h>
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#endif
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#if defined(__INTEL_COMPILER)
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#include <immintrin.h>
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#endif
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#if defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_ARM64))
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#include <intrin.h>
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#endif
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static inline float fp32_from_bits(uint32_t w) {
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#if defined(__OPENCL_VERSION__)
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return as_float(w);
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#elif defined(__CUDA_ARCH__)
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return __uint_as_float((unsigned int) w);
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#elif defined(__INTEL_COMPILER)
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return _castu32_f32(w);
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#elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_ARM64))
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return _CopyFloatFromInt32((__int32) w);
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#else
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union {
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uint32_t as_bits;
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float as_value;
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} fp32 = { w };
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return fp32.as_value;
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#endif
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}
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static inline uint32_t fp32_to_bits(float f) {
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#if defined(__OPENCL_VERSION__)
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return as_uint(f);
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#elif defined(__CUDA_ARCH__)
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return (uint32_t) __float_as_uint(f);
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#elif defined(__INTEL_COMPILER)
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return _castf32_u32(f);
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#elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_ARM64))
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return (uint32_t) _CopyInt32FromFloat(f);
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#else
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union {
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float as_value;
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uint32_t as_bits;
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} fp32 = { f };
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return fp32.as_bits;
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#endif
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}
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static inline double fp64_from_bits(uint64_t w) {
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#if defined(__OPENCL_VERSION__)
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return as_double(w);
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#elif defined(__CUDA_ARCH__)
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return __longlong_as_double((long long) w);
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#elif defined(__INTEL_COMPILER)
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return _castu64_f64(w);
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#elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_ARM64))
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return _CopyDoubleFromInt64((__int64) w);
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#else
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union {
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uint64_t as_bits;
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double as_value;
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} fp64 = { w };
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return fp64.as_value;
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#endif
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}
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static inline uint64_t fp64_to_bits(double f) {
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#if defined(__OPENCL_VERSION__)
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return as_ulong(f);
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#elif defined(__CUDA_ARCH__)
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return (uint64_t) __double_as_longlong(f);
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#elif defined(__INTEL_COMPILER)
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return _castf64_u64(f);
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#elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_ARM64))
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return (uint64_t) _CopyInt64FromDouble(f);
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#else
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union {
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double as_value;
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uint64_t as_bits;
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} fp64 = { f };
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return fp64.as_bits;
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#endif
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}
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#endif /* FP16_BITCASTS_H */
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