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Does anyone know of a JavaScript library that accurately implements the IEEE 754 specification for 32-bit floating-point values? I'm asking because I'm trying to write a cross-compiler in JavaScript, and since the source language has strict requirements that floating-point values adhere to IEEE 754, the generated JavaScript code must do so as well. This means that I must be able to get exactly the correct IEEE 754 values for addition, subtraction, multiplication, and division of 32-bit floats. Unfortunately, the standard JavaScript Number type is a 64-bit double, which will give different results than what I'm expecting. The project really does have to be in JavaScript, and this is the only major stumbling block I have yet to get past.
I'm also running into this problem with 64-bit longs.
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JavaScript Numbers are Always 64-bit Floating Point Unlike many other programming languages, JavaScript does not define different types of numbers, like integers, short, long, floating-point etc.
JavaScript represents numbers using IEEE-754 double-precision (64 bit) format.
Floats generally come in two flavours: “single” and “double” precision. Single precision floats are 32-bits in length while “doubles” are 64-bits. Due to the finite size of floats, they cannot represent all of the real numbers - there are limitations on both their precision and range.
JavaScript Uses 32 bits Bitwise Operands JavaScript stores numbers as 64 bits floating point numbers, but all bitwise operations are performed on 32 bits binary numbers.
The Closure library has a 64-bit long implementation, at least.
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