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While analyzing possible regressions from MSL 4.0.0 to 4.1.0 in OpenModelica, we found issues with several Spice3 model:
```
Modelica.Electrical.Spice3.Examples.Inverter
Modelica.Electrical.Spice3.…
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The minimum of two real numbers is currently very elegantly coded as
```chapel
inline proc min(x: real(?w), y: real(w)) return if (x < y) | isnan(x) then x else y;
```
The following might be bette…
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# 为什么浮点数会有精度问题 · Why - beihai blog
IEEE 二进制浮点数算术标准(IEEE 754)是 20 世纪 80 年代以来最广泛使用的浮点数运算标准,为许多 CPU 与浮点运算器所采用。但这种浮点数表示方法也会带来一定的精度问题,我们将对这一问题进行探讨。
[https://wingsxdu.com/post/why/float-precision-problem…
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### Is your feature request related to a problem? Please describe.
During discussion of gh-21370, it is found that a function that computes `(1+x)**y` accurately would be helpful for accurately com…
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Currently there are only two ways to cast floats to integers
1. `as` casts
2. `to_int_unchecked`
Adding explicit conversion functions could make casting a bit easier.
I would propose the functi…
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### 为什么0.1 + 0.2 != 0.3?
其实有一定编程基础的同学们应该都知道,计算机是采用二进制来表示十进制的,规则是:整数除以2,商继续除以2,得到0为止,将余数逆序排列;小数乘以2,取整,小数部分继续乘以2,取整,得到小数部分0为止,将整数顺序排列。
再回到我们最初的问题, JS 采用 IEEE 754 双精度版本(64位),并且只要采用 IEEE 754 的语言都有前面…
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Give a concise summary of Chapter 1 of [Accuracy and Stability of Numerical Algorithms,
Nicholas J. Higham, 2002](http://dx.doi.org/10.1137/1.9780898718027), with a
particular emphasis on R and IEEE-7…
oleks updated
8 years ago
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Model files contains bit patterns for certain types of data (like floats). Since the size and the precise bit-wise format of a float is not guaranteed by standards, the resulting model files are techn…
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## do_not_check_equality_to_self
## Description
Checking equality to self will always return true and is likely a typo.
## Details
Although good code tries to avoid it, sometimes two diffe…
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MPFR sets the nan flag even when propagating NaNs; this behaviour is different from the IEEE 754 specification, where propagating NaNs doesn't set the NaN flag. We should consider changing the behav…