Notes on Usage of the RX Family C/C++ Compiler V.1.00 Release
Contents
1. Table 9 24 Intrinsic Functions No 14 Correction Before void int_exception unsigned long num Now void int_exception signed long num m Page 303 Page 290 9 2 2 Intrinsic Functions Table 9 24 Intrinsic Functions No 1 7 Correction Before void set_ipl unsigned long level Now void set_ipl signed long level m Page 666 Table 10 1 Types of Name Label name Symbol name Addition Each symbol name includes a label name m Page 667 10 1 4 Coding of Labels Addition Remarks You cannot define a section name which is the same as an existing symbol name If a symbol and section of the same name are defined the first one will be effective and the others will lead to the 7 10 ROCSRX00XSWO01R ERN100630 A2118 error m Page 716 10 3 3 Link Directives SECTION Remarks Addition You cannot define a symbol name which is the same as an existing section name If a section and symbol of the same name are defined the first one will be effective and the second one will lead to the A2118 error The section name iop is reserved and cannot be defined If this is attempted error A2049 is reported SECTION Siop code Error A2049 m Page 723 10 3 6 Extended Function Directives Table 10 35 Extended Function Directives Deletion Note FILE is included in the assembly language file generated by the compiler FILE is valid only in the assembly language file generated by the compiler do not use2. 0 9 1 2 Internal Data Representation Table 9 17 No 1 Notes 1 bool Correction Before Notes 1 The bool type is only valid for C and C99 programs After Notes 1 The bool type is only valid for programs in C and C99 with stdbool h included m Page 259 9 1 3 Floating Point Number Specifications 2 float Type Note Correction Before Note A not a number is called a quiet NaN when the MSB of the mantissa is 0 or signaling NaN when the MSB of the mantissa is 1 After Note A not a number is called a quiet NaN when the MSB of the mantissa is 1 or signaling NaN when the MSB of the mantissa is 0 m Page 261 9 1 3 Floating Point Number Specifications 3 double Types and long double Types Note Before 6 10 ROCSRX00XSWO01R ERN100630 Note A not a number is called a quiet NaN when the MSB of the mantissa is 0 or signaling NaN when the MSB of the mantissa is 1 After Note A not a number is called a quiet NaN when the MSB of the mantissa is 1 or signaling NaN when the MSB of the mantissa is 0 m Page 275 9 2 1 pragma interrupt Remarks Addition When vect is used as an interrupt specification the address of all empty vectors is 0 You can specify a desired address value or symbol for that address with the optimizing linkage editor For details refer to the descriptions on the VECT and VECTN options in section 5 2 2 Output Options m Page 301 Page 290 9 2 2 Intrinsic Functions
3. R ERN100630 m Page 49 2 5 Microcontroller Options denormalize options Addition Remarks The treatment of denormalized numbers in floating point operations in program execution cannot be modified by this option m Page 65 Table 3 1 Library Generator Options No 5 lang option Correction Before Creates a reentrant library After Selects the available functions in the C standard library m Page 65 Table 3 1 Library Generator Options Addition No 6 cpu rx600 Creates a library for the RX600 series m Page 142 5 2 7 Other Options DELete option Addition Remarks When form library is specified modules can be deleted When form absolutelrelocatelhexadecimallstypelbinary is specified external symbols can be deleted m Page 240 9 1 2 Internal Data Representation Table 9 15 No 22 bool Correction Before Size 4 Alignment 4 Sign Used After Size 1 Alignment 1 Sign Unspecified 5 10 ROCSRX00XSWO01R ERN100630 m Page 240 9 1 2 Internal Data Representation Table 9 15 No 22 bool Addition The _Bool type can be used in C99 comlilation The _Bool type is compiled as the bool type m Page 240 9 1 2 Internal Data Representation Table 9 15 No 22 bool Notes 5 Correction Before Notes 5 This data type is valid for C and C99 compilation only After Notes 5 This data type is only valid for compilation in C and C99 with stdbool h included m Page 25
4. ROCSRX00XSWO01R ERN100630 Notes on Usage of the RX Family C C Compiler V 1 00 Release 01 and Corrections in the User s Manual There are notes on usage of the RX Family C C compiler V 1 00 Release 01 and corrections to be made in the bundled user s manual REJ10J2062 0100 as listed below 1 Notes on Usage 1 1 Note on a Case of the C1804 Message C C Compiler When the int_to_short option is specified and a file including a C standard header is compiled as C or EC the compiler may show the C1804 W message In this case simply ignore the message because there are no problems NOTE In compilation of C or EC the int_to_short option will be invalid Data that are shared between C and C EC program must be declared as the long or short type rather than as the int type 1 2 Note on using MVTC or POPC instructions Assembler In the assembly language the program counter PC cannot be specified for MVTC or POPC instructions 1 3 Note on the delete Option for Linkage Optimizing linkage editor When a function symbol is removed by the delete option its following function in the source program is not allowed to have a breakpoint at its function name on the editor in your debugging If you would like to set a breakpoint at the function entrance set the breakpoint via the Label window or at the prologue code of the function 1 4 Notes of Paths Name and File Name Optimizing linkage editor In the specifica
5. ified it is interpreted as follows enum a b int g void if sizeof enum b a return a return b 9 10 ROCSRX00XSWO01R ERN100630 E Page 864 15 1 Notes on Program Coding Addition 9 Operations and Type Conversions That Lead to Overflows The results of operations or type conversions must be within the range of values allowed for the selected type i e values must not overflow If an overflow occurs the result of the operation or type conversion may be affected by other conditions such as compiler options In the standard C language the results of operations that lead to overflows are undefined and thus may differ depending on the current compiling conditions Ensure that overflows will not be caused by any operations in programs The following example illustrates this problem Example Type conversion from float to unsigned short float f 2147483648 0f unsigned short ui2 void exlfunc void ui2 f Type conversion from float to unsigned short The value of ui2 which is acquired as the result of executing ex1func depends on whether fpu or nofpu has been specified fpu with the FPU ui2 65535 nofpu without the FPU ui2 0 This is because the method of type conversion from float to unsigned short differs depending on whether fpu or nofpu has been specified 10 10
6. it in a user created assembly language file m Page 828 12 2 List of Messages A2040 E Include nesting over Correction Before Rewrite include so that it is nested within the valid levels After Rewrite include so the depth of include nest is below or equal to 30 m Page 836 12 2 List of Messages A3202 F Can t find work dir Correction Before The work directory is not found After The work directory is not found Make sure that the correct value is set to environment variable TMP_RX E Page 842 13 2 List of Messages L1200 W Backed up file file 1 into file 2 Correction Before 8 10 ROCSRX00XSWO01R ERN100630 The file file 1 was backed up to the file file 2 Now The file 1 has been overwritten A backup copy of the data in the previous file 1 was saved in file 2 m Page 861 15 1 Notes on Program Coding 4 Overflow Operation and Zero Division Deletion fa 3 5e 40f W Detects overflow in floating point operation Note The sample code given in the example will lead to error C5030 E C5030 E Floating constant is out of range E Page 863 15 1 Notes on Program Coding 8 Differences between C89 Operation and C99 Operation Correction Before If the above code is compiled with lang c99 specified it is interpreted as follows enum a b int g void if sizeof enum b a return a return b Now If the above code is compiled with lang c99 spec
7. orrections E Page 17 2 1 Source Options check option check nc Correction Before When check nc is specified a message is output for the following Now When check nc is specified the following options and types will be checked 3 10 ROCSRX00XSWO01R ERN100630 m Page 17 2 1 Source Options check option check ch38 Correction Before When check ch38 is specified a message is output for the following Now When check ch38 is specified the following options and types will be checked m Page 35 36 2 4 Optimize Options inline noinline options Addition Remarks A value from 0 to 65535 is specifiable as lt numerical value gt m Page 37 2 4 Optimize Options case options Correction Before The jump table is output to a constant area section Now The jump table is output to a switch statement branch table area section m Page 41 2 4 Optimize Options map smap nomap options Correction Before output obj or output src is specified Now output obj is specified m Page 42 2 4 Optimize Options map smap nomap options Addition Remarks This option is only valid for C C files The optimization is not performed for C C files with output srce option or assembly sources m Page 49 2 5 Microcontroller Options round options Addition Remarks The rounding method of floating point operations in program execution cannot be modified by this option 4 10 ROCSRX00XSWO01
8. tion of the optimizing linkage editor the parentheses and signs for the path names and file names cannot be used because these signs are used for the option descriptions 1 10 ROCSRX00XSWO01R ERN100630 1 5 Note on Using the I O Library High Performance Embedded Workshop Generating Projects Tick Use Heap Memory if Use IO Library has been ticked for generation of a project Generate main Function c source file y IV 1 0 Register Definition Files Generate Hardware Setup Function None v If Use I O Library is ticked and Use Heap Memory is not the following message will be output L2310 E Undefined external symbol _sbrk referenced in xgetmem When you have encountered this problem you should add the following C program to your project 2 10 ROCSRX00XSWO01R ERN100630 include lt stddef h gt include lt stdio h gt define HEAPSIZE 0x400 signed char sbrk size_t size union HEAP_TYPE signed long dummy signed char heap HEAPSIZE tic union HEAP_TYPE heap_area End address allocated by sbrk static signed char brk signed char amp heap_area signed char sbrk size_t size signed char p if ork size gt heap_area heap HEAPSIZE Signed char 1 else brk brk size return p 2 Corrections in the User s Manual 2 1 Additions and C
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