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Home/ Questions/Q 8943211
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Editorial Team
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Editorial Team
Asked: June 15, 20262026-06-15T11:43:05+00:00 2026-06-15T11:43:05+00:00

Specifically I am doing this Word32 x = 18653184; Word32 y; Word16 shift =

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Specifically I am doing this

Word32 x = 18653184;
Word32 y;
Word16 shift = 269;
y = x >> shift;

I’d expect the result of this logical shift to be 0, but I am instead getting 2277. How does C define this type of operation?

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  1. Editorial Team
    Editorial Team
    2026-06-15T11:43:06+00:00Added an answer on June 15, 2026 at 11:43 am

    Yes, it is undefined behavior, according to section 6.5.7 paragraph 3

    … If the value of the right operand is negative or is greater than or equal to the width of the promoted left operand, the behavior is undefined.

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