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Why does making int* to float* conversions undefined behavior help ...


What float values could not be converted to int without undefined ...

1 A prvalue of a floating point type can be converted to a prvalue of an integer type. The conversion truncates; that is, the fractional part is ...

Why does making int* to float* conversions undefined behavior help ...

Basically because if the compiler can assume that pointers to different types don't point to the same piece of memory then it can make a ...

Float to integer conversion may result in undefined behavior #276

In all non-constant conversions involving floating-point or complex values, if the result type cannot represent the value the conversion ...

Converting float to int can be undefined behavior and how to fix it

This is surprising, easy to miss and badly designed as there is no standard way of safely performing this conversion. In practice you will get ...

The overflow when converting from float to integer is undefined ...

In conclusion the overflow in the conversion from floating-point to integer is rather on the nasty side of C's undefined behavior spectrum. It ...

Undefined behavior in C/C++ - Handmade Network

For unsigned integers overflow/underflow is defined behavior. It performs operation % 2**n . For signed integers over/under-flow is undefined ...

Why type conversion between int and float causes data loss?

The value of ptr_i is NOT 1115881472. The value of ptr_i is the address of object f. 1115881472 is the decimal representation of whatever data ...

floating point to integer casts can cause undefined behaviour #10184

A flag has been implemented in the compiler, -Zsaturating-float-casts, which will cause all float to integer casts have saturating behavior.

C++ programmer's guide to undefined behavior: part 2 of 11

Narrowing conversions from float to signed or unsigned integers may result in undefined behavior if the value is unrepresentable in the integer ...

How to actually convert float to int? - Arduino Forum

The implicit conversion will cause an overflow when you assign it to a long . The behavior is undefined in C++ for signed integer overflow ...

Implicit conversions - cppreference.com

Although signed integer overflow in any arithmetic operator is undefined behavior, overflowing a signed integer type in an integer conversion is ...

UndefinedBehaviorSanitizer — Clang 20.0.0git documentation

... are conversions from floating point to integer types. ... Issues caught by these sanitizers are not undefined behavior, but are often unintentional.

C++ Float to Int Conversion (How To Guide) | by ryan - Medium

These functions return a float, which is then implicitly converted to int. Be cautious: for very large floats, this implicit conversion can ...

Why is type reinterpretation considered highly problematic in many ...

C++ disallows reinterpret_cast from int to float as far as I know, and using a union or pointer cast to reinterpret an int to a float or vice ...

A Study on Undefined Behavior in C - Solid Sands

However, other cases with division by zero is not possible to be detected by compilers and tools. In Chapter 7 we make an analysis for integer overflow and ...

Type System - learn.adacore.com

Are the three programs above equivalent? It may seem like Ada is just adding extra complexity by forcing you to make the conversion from Integer to Float ...

FLP06-C. Convert integers to floating point for floating-point operations

When converting integers to floating-point values, and vice versa, it is important to carry out proper range checks to avoid undefined behavior (see FLP34-C.

Why no warning? - Raspberry Pi Forums

It's the "it's perfectly valid C" part that troubles me. The C language standard has the notion of "undefined behaviour". It is defined in the standard.

undefined-behavior - Frama-C

The overflow when converting from float to integer is undefined behavior. Pascal Cuoq on 9 October 2013 ... Integer overflows in C A previous post on this blog ...

C++ programmer's guide to undefined behavior: part 1 of 11

The code doesn't contain undefined behavior (not in the used input data, at least). However, the implicit type conversion is there, making the ...