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MAEC TOOL NEWS:
MAECT-M3T-NC308WA-021201D
Notes on C compilers
M3T-NC308WA and M3T-NC30WA
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Please take note of the following problems in using C compilers (with an assembler and integrated development environment) M3T-NC308WA and M3T-NC30WA:
- On placing a #pragma ASM--ENDASM block immediately after the definition of an inline function
- On defining inline functions
- Problem on Placing a #pragma ASM--ENDASM Block Immediately after the Definition of an Inline Function
- 1.1 Products and Versions Concerned
- M3T-NC308WA V.5.00 Release 1
- for the M32C/80, M16C/80, and M16C/70 series MCUs
- M3T-NC30WA V.5.00 Release 1 and Release 2
- for the M16C/60, M16C/30, M16C/20, and M16C/10 series MCUs
- 1.2 Description
- Placing a #pragma ASM--ENDASM block immediately after the definition of an inline function results in a parse error.
- 1.3 Example
---------------------------------------------
inline void func(void)
{
/* Processing of an inline function */
}
#pragma ASM
; Description in assembly language
#pragma ENDASM
---------------------------------------------
- 1.4 Workaround
- This problem can be circumvented in either of the following ways.
- (1) Place a #pragma ASM-ENDASM block before the definition of an inline function.
[Example]
---------------------------------------------
#pragma ASM
; Description in assembly language
#pragma ENDASM
inline void func(void)
{
/* Processing of an inline function */
}
---------------------------------------------
- (2) Define any function other than inline functions between an inline function and a #pragma ASM-ENDASM block.
[Example]
---------------------------------------------------------------
inline void func(void)
{
/* Processing of an inline function */
}
static void dummy(void){} /* Definition of a function other
than inline functions */
#pragma ASM
; Description in assembly language
#pragma ENDASM
---------------------------------------------------------------
- 1.5 Schedule of Fixing the Problem
- We plan to fix this problem in our next release of the products.
Notes on C compilers M3T-NC308WA and M3T-NC30WA
MAECT-M3T-NC308WA-021201D
- Problem on Defining Inline Functions
- 2.1 Product and Versions Concerned
- M3T-NC30WA V.5.00 Release 1 and Release 2
- for the M16C/60, M16C/30, M16C/20, and M16C/10 series MCUs
- 2.2 Description
- Defining any inline function may results in System Error being generated.
- 2.3 Conditions
- This problem occurs if the following four conditions are satisfied:
- (1) Any one or more of the optimizing options -O, -O[3-5], -OR, and -OS are used.
- (2) No function except inline functions is defined between the definition of the last inline function and the end of the file.
- (3) A variable declared to be of type extern exists between the definition of the last inline function and the end of the file.
- (4) The variable in (3) is initialized between its declaration in (3) and the end of the file.
- [Notice] The definition of the last inline function stated in Conditions (2) and (3) is also applied to the one that is made in include files.
- 2.4 Example
---------------------------------------------
inline void func(void)
{
/* Processing of an inline function */
}
extern int i; /* Condition (3) */
int i = 0; /* Condition (4) */
---------------------------------------------
- 2.5 Workaround
- Define a dummy function after the definition of the inline function.
[Example]
--------------------------------------------------------
inline void func(void)
{
/* Processing of an inline function */
}
static void dummy(void){} /* Definition of a dummy function */
extern int i;
int i = 0;
--------------------------------------------------------
- 2.6 Schedule of Fixing the Problem
- We plan to fix this problem in our next release of the product.
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