 |
|
|
MAEC TOOL NEWS:
MAECT-M3T-NC308WA_2-020616D
A Note on C Compilers
M3T-NC308WA, M3T-NC30WA, and M3T-NC79WA;
and Assemblers AS308, AS30, and AS79
|
|---|
Please take note of the following problem in using C compilers (with an assembler and integrated development environment) M3T-NC308WA, M3T-NC30WA, and M3T-NC79WA:
- On using macro directive command ".LOCAL"
- Products and Versions Concerned
- C compiler for the M32C/80 and M16C/80 series MCUs:
- M3T-NC308WA V.1.00 Release 1 -- V.3.10 Release 3
- C compiler for the M16C/60, M16C/30, M16C/20, and M16C/10 series MCUs:
- M3T-NC30WA V.3.20 Release 1 -- V.5.00 Release 1
- C compiler for the 79xx series MCUs:
- M3T-NC79WA V.3.20 Release 1 -- V.4.10 Release 1
- Relocatable assembler for the M32C/80 and M16C/80 series MCUs:
- AS308 V.1.00 Release 1 -- V.2.00 Release 1
- Relocatable assembler for the M16C/60, M16C/30, M16C/20, and M16C/10 series MCUs:
- AS30 V.1.00 Release 1 -- V.3.20 Release 1
- Relocatable assembler for the 79xx series MCUs:
- AS79 V.2.00 Release 1 -- V.3.20 Release 1
- Problem
When a ".LOCAL" macro directive command and a character string are described in a macro definition, the character string may not correctly be expanded.
- Conditions
- This problem occurs if the following three conditions are satisfied:
- (1) A macro local label is declared using macro directive command ".LOCAL" in a macro definition.
- (2) A character string is described in the macro definition in (1).
- (3) The character string in (2) ends with a period (".").
- Example
[Assembly-language source file]
--------------------------------------------------------------------
mac .macro
.local btop, bend <-- Condition (1)
btop:
.byte bend - btop
.byte "string." <-- Conditions (2) and (3)
bend:
.endm
.section prg,code
mac
.end
--------------------------------------------------------------------
[Results of macro expansion]
--------------------------------------------------------------------
.local btop, bend
..ml0001:
.byte ..ml0002 - ..ml0001
.byte "stringstring" <-- Expanded incorrectly
..ml0002:
.endm
--------------------------------------------------------------------
- Workaround
- Separate special character "." from the preceding character string and define the special character as an immediate value.
[Example]
--------------------------------------------------------------------
mac .macro
.local btop, bend
btop:
.byte bend - btop
.byte "string", 2EH <-- Special character "." is
defined as an immediate value.
bend:
.endm
--------------------------------------------------------------------
- Schedule of Fixing the Problem
We plan to fix this problem in our next release.
|
|
