What's New in C166 Version 7.55

• [C166 C Compiler]
  • Corrected: under some circumstances the C166 generates wrong code with optimization levels >= 6. Example:

      5         unsigned long ulA;
      6         float *pfA;
      7         float fA;
      8
      9         void main (void)  {
     10
     11         ulA = 0x43874F74ul;
     12         pfA = (float *)&ulA;
     13         fA = *pfA;                     /*  This may create wrong code which is not initializing the fA variable. */
    
    
    
                 ; FUNCTION main (BEGIN  RMASK = @0x7FFF)
                                               ; SOURCE LINE # 9
                                               ; SOURCE LINE # 11
    0000 E6F4744F      MOV       R4,#04F74H
    0004 E6F58743      MOV       R5,#04387H
    0008 F6F40400 R    MOV       ulA,R4
    000C F6F50600 R    MOV       ulA+02H,R5
                                               ; SOURCE LINE # 12
    0010 E6F40400 R    MOV       R4,#ulA
    0014 F6F40800 R    MOV       pfA,R4
    
                                               ; SOURCE LINE # 13  --+
    0018 E6F49F0E      MOV       R4,#0E9FH     ;                     |\ 
    001C E6F5874E      MOV       R5,#04E87H    ;                   --+ o-> Wrong code generation.
    
    
                                               ; SOURCE LINE # 13  --+
    0018 F2F40400 R    MOV       R4,ulA        ;                     |\ 
    001C F2F50600 R    MOV       R5,ulA+02H    ;                     | \ 
    0020 F6F40000 R    MOV       fA,R4         ;                     |  \ 
    0024 F6F50200 R    MOV       fA+02H,R5     ;                   --+   o-> Right code generation.
    

• [µVision]
  • This C166 release comes with µVision V5.14.1.