SEI CERT C Coding Standard

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Comment: minor editorial change

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Although shifting a negative number of bits or or shifting a number of bits greater than or equal to the width of the promoted left operand is undefined behavior in C, the risk is generally low because processors frequently reduce the shift amount modulo the width of the type.

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SEI CERT C Coding StandardINT13-C. Use bitwise operators only on unsigned operands
INT35-C. Use correct integer precisions
INT32-C. Ensure that operations on signed integers do not result in overflow
ISO/IEC TR 24772:2013Arithmetic Wrap-around Around Error [FIF]

Bibliography

[C99 Rationale 2003]6.5.7, "Bitwise Shift Operators"
[Dowd 2006]Chapter 6, "C Language Issues"
[Seacord 2013b]Chapter 5, "Integer Security"
[Viega 2005]Section 5.2.7, "Integer Overflow"

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