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  1. Embedded Software & Tools
  2. EXT_EP-11231

Compiler emits the wrong constant when the input to __delay_cycles exceeds INT32_MAX

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    • Icon: Bug Bug
    • Resolution: Unresolved
    • Icon: Low Low

      The problem only occurs when building on Linux.

      The attached file.c contains these lines ...

      const uint32_t MAX_CYCLES_WITHOUT_ERROR = INT32_MAX;
void main(void)
{
  __delay_cycles(MAX_CYCLES_WITHOUT_ERROR);
  __delay_cycles(MAX_CYCLES_WITHOUT_ERROR+22);
}

      Build it ...

      $ clpru -s file.c
"file.asm", WARNING! at line 76: [W0001] Constant value out of range, will be
                                         truncated to 32 bits
                LDI32    r0, 9223372035781033993

No Assembly Errors, 1 Assembly Warning

      This line is associated with the second call to __delay_cycles. When built on Windows, the compiler emits this instead ...

              LDI32    r0, 1073741833

            syncuser TI User
            syncuser TI User
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              Created:
              Updated: