softfloat.cpp

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/*
**  Copyright (C) - Triton
**
**  This program is under the terms of the Apache License 2.0.
*/
 
#include <triton/softfloat.hpp>
 
#include <cstring>
 
namespace triton {
  namespace sf {
 
    uint16_t f32_to_f16(float value) {
      uint32_t f;
 
      static_assert(sizeof(float) == sizeof(uint32_t), "Unexpected float type size");
      std::memcpy(&f, &value, sizeof(uint32_t));
 
      uint16_t sign     = ((f >> 16) & 0x8000);
      int16_t exponent  = ((f >> 23) & 0xff) - 127 + 15;
      uint16_t mantissa = ((f >> 13) & 0x3ff);
 
      if (exponent <= 0) {
        if (exponent < -10) {
          return sign;
        }
        mantissa = (mantissa | 0x400) >> (1 - exponent);
        return sign | mantissa;
      }
 
      else if (exponent == 0xff - (127 - 15)) {
        if (mantissa) {
          return sign | 0x7fff;
        } else {
          return sign | 0x7c00;
        }
      }
 
      else if (exponent > 30) {
        return sign | 0x7c00;
      }
 
      return sign | (exponent << 10) | mantissa;
    }
    uint16_t f32_to_f16(float value) {…}
 
  };  /* sf namespace */
}; /* triton namespace */