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  1. JDK
  2. JDK-8248901

Signed immediate support in .../share/assembler.hpp is broken.

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    • b07
    • generic
    • generic

        Min/Max values are undefined for nbit > 32 (and nbit < 0) in:

        static int min_simm(int nbits) { return -(intptr_t(1) << (nbits - 1)) ; }
        static int max_simm(int nbits) { return (intptr_t(1) << (nbits - 1)) - 1; }
         // Test if x is within signed immediate range for nbits
         static bool is_simm(intptr_t x, int nbits) { return min_simm(nbits) <= x && x <= max_simm(nbits); }

        The max/min_simm* versions are unused (with one exception).

        Unsigned version is not provided.

              phedlin Patric Hedlin (Inactive)
              phedlin Patric Hedlin (Inactive)
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                Created:
                Updated:
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