| 28,6 → 28,7 |
|---|
| |
| #include "sftypes.h" |
| #include "conversion.h" |
| #include "comparison.h" |
| |
| float64 convertFloat32ToFloat64(float32 a) |
| { |
| 66,7 → 67,7 |
|---|
| |
| return result; |
| |
| }; |
| } |
| |
| float32 convertFloat64ToFloat32(float64 a) |
| { |
| 135,5 → 136,75 |
|---|
| result.parts.exp = exp; |
| result.parts.fraction = a.parts.fraction >> (FLOAT64_FRACTION_SIZE - FLOAT32_FRACTION_SIZE); |
| return result; |
| }; |
| } |
| |
| |
| /** Helping procedure for converting float32 to uint32 |
| * @param a floating point number in normalized form (no NaNs or Inf are checked ) |
| * @return unsigned integer |
| */ |
| static __u32 _float32_to_uint32_helper(float32 a) |
| { |
| __u32 frac; |
| |
| if (a.parts.exp < FLOAT32_BIAS) { |
| /*TODO: rounding*/ |
| return 0; |
| } |
| |
| frac = a.parts.fraction; |
| |
| frac |= FLOAT32_HIDDEN_BIT_MASK; |
| /* shift fraction to left so hidden bit will be the most significant bit */ |
| frac <<= 32 - FLOAT32_FRACTION_SIZE - 1; |
| |
| frac >>= 32 - (a.parts.exp - FLOAT32_BIAS) - 1; |
| if ((a.parts.sign == 1) && (frac != 0)) { |
| frac = ~frac; |
| ++frac; |
| } |
| |
| return frac; |
| } |
| |
| /* Convert float to unsigned int32 |
| * FIXME: Im not sure what to return if overflow/underflow happens |
| * - now its the biggest or the smallest int |
| */ |
| __u32 float32_to_uint32(float32 a) |
| { |
| if (isFloat32NaN(a)) { |
| return MAX_UINT32; |
| } |
| |
| if (isFloat32Infinity(a) || (a.parts.exp >= (32 + FLOAT32_BIAS))) { |
| if (a.parts.sign) { |
| return MIN_UINT32; |
| } |
| return MAX_UINT32; |
| } |
| |
| return _float32_to_uint32_helper(a); |
| } |
| |
| /* Convert float to signed int32 |
| * FIXME: Im not sure what to return if overflow/underflow happens |
| * - now its the biggest or the smallest int |
| */ |
| __s32 float32_to_int32(float32 a) |
| { |
| if (isFloat32NaN(a)) { |
| return MAX_INT32; |
| } |
| |
| if (isFloat32Infinity(a) || (a.parts.exp >= (32 + FLOAT32_BIAS))) { |
| if (a.parts.sign) { |
| return MIN_INT32; |
| } |
| return MAX_INT32; |
| } |
| return _float32_to_uint32_helper(a); |
| } |
| |
| |
| |