Math-Ryu

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Ryu_Library/ryu/d2fixed.c  view on Meta::CPAN

          digits /= 10;
        }
#ifdef RYU_DEBUG
        printf("lastDigit=%u\n", lastDigit);
#endif
        if (lastDigit != 5) {
          roundUp = lastDigit > 5;
        } else {
          // Is m * 10^(additionalDigits + 1) / 2^(-e2) integer?
          const int32_t requiredTwos = -e2 - (int32_t) precision - 1;
          const bool trailingZeros = requiredTwos <= 0
            || (requiredTwos < 60 && multipleOfPowerOf2(m2, (uint32_t) requiredTwos));
          roundUp = trailingZeros ? 2 : 1;
#ifdef RYU_DEBUG
          printf("requiredTwos=%d\n", requiredTwos);
          printf("trailingZeros=%s\n", trailingZeros ? "true" : "false");
#endif
        }
        if (maximum > 0) {
          append_c_digits(maximum, digits, result + index);
          index += maximum;

Ryu_Library/ryu/d2fixed.c  view on Meta::CPAN

#endif
  // 0 = don't round up; 1 = round up unconditionally; 2 = round up if odd.
  int roundUp = 0;
  if (lastDigit != 5) {
    roundUp = lastDigit > 5;
  } else {
    // Is m * 2^e2 * 10^(precision + 1 - exp) integer?
    // precision was already increased by 1, so we don't need to write + 1 here.
    const int32_t rexp = (int32_t) precision - exp;
    const int32_t requiredTwos = -e2 - rexp;
    bool trailingZeros = requiredTwos <= 0
      || (requiredTwos < 60 && multipleOfPowerOf2(m2, (uint32_t) requiredTwos));
    if (rexp < 0) {
      const int32_t requiredFives = -rexp;
      trailingZeros = trailingZeros && multipleOfPowerOf5(m2, (uint32_t) requiredFives);
    }
    roundUp = trailingZeros ? 2 : 1;
#ifdef RYU_DEBUG
    printf("requiredTwos=%d\n", requiredTwos);
    printf("trailingZeros=%s\n", trailingZeros ? "true" : "false");
#endif

d2fixed.c  view on Meta::CPAN

          digits /= 10;
        }
#ifdef RYU_DEBUG
        printf("lastDigit=%u\n", lastDigit);
#endif
        if (lastDigit != 5) {
          roundUp = lastDigit > 5;
        } else {
          // Is m * 10^(additionalDigits + 1) / 2^(-e2) integer?
          const int32_t requiredTwos = -e2 - (int32_t) precision - 1;
          const bool trailingZeros = requiredTwos <= 0
            || (requiredTwos < 60 && multipleOfPowerOf2(m2, (uint32_t) requiredTwos));
          roundUp = trailingZeros ? 2 : 1;
#ifdef RYU_DEBUG
          printf("requiredTwos=%d\n", requiredTwos);
          printf("trailingZeros=%s\n", trailingZeros ? "true" : "false");
#endif
        }
        if (maximum > 0) {
          append_c_digits(maximum, digits, result + index);
          index += maximum;

d2fixed.c  view on Meta::CPAN

#endif
  // 0 = don't round up; 1 = round up unconditionally; 2 = round up if odd.
  int roundUp = 0;
  if (lastDigit != 5) {
    roundUp = lastDigit > 5;
  } else {
    // Is m * 2^e2 * 10^(precision + 1 - exp) integer?
    // precision was already increased by 1, so we don't need to write + 1 here.
    const int32_t rexp = (int32_t) precision - exp;
    const int32_t requiredTwos = -e2 - rexp;
    bool trailingZeros = requiredTwos <= 0
      || (requiredTwos < 60 && multipleOfPowerOf2(m2, (uint32_t) requiredTwos));
    if (rexp < 0) {
      const int32_t requiredFives = -rexp;
      trailingZeros = trailingZeros && multipleOfPowerOf5(m2, (uint32_t) requiredFives);
    }
    roundUp = trailingZeros ? 2 : 1;
#ifdef RYU_DEBUG
    printf("requiredTwos=%d\n", requiredTwos);
    printf("trailingZeros=%s\n", trailingZeros ? "true" : "false");
#endif