What's New in C166 Version 7.56

• [C166 C Compiler]
  • Corrected: error C67 'a': 'undefined identifier' was issued on an enumeration passed as parameter to a function. For example:

    void foo( enum enA { a, b, i_a = a } );
    
    *** ERROR C67 'a': undefined identifier
    

  • Corrected: an erroneously issued warning C118 in case of an enum definition with negative values. Exmaple:

    test.c
    ......
    enum { m4 = -4, m3 = -3, m2 = -2, m1 = -1, z };
    
    test.c(2): warning C118: enum constant: signed value out of range
    

  • 
    Corrected: under some circumstances a wrong relocation of register variables will be generated in case of the following expression and optimize level 8 Register Variable Lifetime Analysis. Example:

    int gl_a;
    int gl_b;
    
    int foo(void) {
       int a;
       int b;
       int error;
    
       a = gl_a;                               /* Source line #12 */
       b = gl_b;                               /* Source line #13 */
    
       error = abs(a/10-b/10);                 /* Source line #15 */
    
       if (error > 100)
          return 1;
       else
          return 0;
    }
    
    +-----------------------------
    Wrong code generation
    +-----------------------------
    .........
                                               ; SOURCE LINE # 13
    0004 F2F40000 R    MOV       R4,gl_b                           -------------\ 
    ;---- Variable 'b' assigned to Register 'R4' ----                            \  The compiler optimization erroneously relocates the register variable b
                                               ; SOURCE LINE # 15                /  to the register R4 which is used by the next instruction.
    0008 E0A4          MOV       R4,#0AH                           -------------/
    000A F6F40EFE      MOV       MDL,R4                                         |
    000E 4B44          DIV       R4                                             |
    .........                                                                   |
                                                                                |
                                                                                |
    +-----------------------------                                              |
    Corrected code generation                                                   |
    +-----------------------------                                              |
    .........                                                                   |
                                               ; SOURCE LINE # 13               |
    0004 F2F60000 R    MOV       R6,gl_b                           -------------\ 
    ;---- Variable 'b' assigned to Register 'R6' ----                            \  The corrected code optimization is using now the register R6
                                               ; SOURCE LINE # 15                /  for the relocation of register variable b.
    0008 E0A4          MOV       R4,#0AH                           -------------/
    000A F6F60EFE      MOV       MDL,R6
    000E 4B44          DIV       R4
    

• [L166 Linker]
  • Increase: the max number of externals/publics to 32766.
• [µVision]
  • This C166 release comes with µVision V5.21.1.
  • µVision now offers Japanese localization on Windows PCs with the 'primary language' Japanese.
    To select the language use the uVision menu item Edit - Configuration - Other - Startup - Language.
  • A Japanese Getting Started user's guide is available in the uVision Books Window.
  • Added: new option to limit the Find in Files utility to the "Current Document".
  • Enhanced: editor now supports Arabic, Baltic, Eastern European, Greek, Hebrew, Russian, Thai, Turkish, and Vietnamese character sets.
  • Corrected: Bookmark navigation is now working only on the "Current Document".
  • Corrected: opening struct elements in the Watch Window did not always show up-to-date values.
• [Supported Operating Systems]
  • µVision and it's dynamically loaded libraries (DLL) have been ported to MSVC 2015. MSVC 2015 does not officially support Windows XP any longer.
  • Refer to System Requirements Overview for hardware and operating system requirements.