SW500008 Microchip Technology, SW500008 Datasheet - Page 390

• Manufacturer Part Number: SW500008
• Description: PICC-18 STD
• Manufacturer: Microchip Technology
• Type: Compilerr
• Series: PIC18r

Specifications of SW500008

• Supported Families: PIC18
• Core Architecture: PIC
• Software Edition: Standard
• Kit Contents: Software And Docs
• Mcu Supported Families: PIC18
• Tool Function: Compiler
• Tool Type: Compiler
• Lead Free Status / RoHS Status: Not applicable / RoHS Compliant
• For Use With/related Products: PIC18 Series
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 015; 778-1001; 778-1001

(753) undefined shift (* bits)
An attempt has been made to shift a value by a number of bits equal to or greater than the number of
bits in the data type. This will produce an undefined result on many processors. This is non-portable
code and is flagged as having undefined results by the C Standard, e.g.:
(754) bitfield comparison out of range
This is the result of comparing a bitfield with a value when the value is out of range of the bitfield.
For example, comparing a 2-bit bitfield to the value 5 will never be true as a 2-bit bitfield has a range
from 0 to 3, e.g.:
(755) division by zero
A constant expression that was being evaluated involved a division by zero, e.g.:
(757) constant conditional branch
A conditional branch (generated by an if, for, while statement etc.) always follows the same path.
This will be some sort of comparison involving a variable and a constant expression. For the code
generator to issue this message, the variable must have local scope (either auto or static local) and
the global optimizer must be enabled, possibly at higher level than 1, and the warning level threshold
may need to be lower than the default level of 0.
a function. For C code that compares these variables to constants, the result of the comparison can
be deduced at compile time and the output code hard coded to avoid the comparison, e.g.:
376
The global optimizer keeps track of the contents of local variables for as long as is possible during
int input;
input < <= 33; /* woops -- that shifts the entire value out of input */
struct {
} value;
int compare(void)
{
}
a /= 0; /* divide by 0: was this what you were intending */
unsigned mask : 2; /* mask can hold values 0 to 3 */
return (value.mask == 6); /* test can
Error and Warning Messages
(Code Generator)
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