Using LDR instruction in Cortex A8 with CCSv4

Can you try without the "="? For example...

LDR r0, #0x1000

For more information checkout the Assembler User Guide found in:

C:\Program Files\Texas Instruments\ccsv4\tools\compiler\tms470\docs\SPNU118G.pdf

Yes, I tried to use with LDR r0, #0x1000

but it is giving error again. another problem is with RBIT instruction.

when i use RBIT r7,r8. giving error illegal mnemonic.

as in some documents it said that RBIT instruction is not available in armv6 and above.

but it is working when i compile with rvds3.0 setting armv7a option.

can any one suggest me to use this instruction in CCSv4?

Thanks,

Vinay.

Are you using the -mv7A8 compiler switch to tell the compiler that you're using a Cortex A8?

yes, iam using -mv7a8 compiler switch.

Similar problem here.

I am trying following lines in the assembler

    RBIT    R2, R0         ; R2 := reversed low  32 bits of input = high 32 bits of result.
    RBIT    R3, R1         ; R3 := reversed high 32 bits of input = low  32 bits of result.

My toolchain is 4.6.5 

Compiler output

"C:\Program Files\Texas Instruments\TMS470 Code Generation Tools 4.6.5\bin\cl470.exe"  -q -g -s -mv7R4 -al --elf -me -mv7R4 --abi=eabi --code_state=32  C:\arkady\work\wl9_base\firmware\asm_utils.asm
2 Assembly Errors, No Assembly Warnings
"C:\arkady\work\wl9_base\firmware\asm_utils.asm", ERROR!   at line 153:
 [E0002]
         Illegal mnemonic specified
        RBIT    R2, R0         ; R2 := reversed low  32 bits of input = high 32 bits of result.

"C:\arkady\work\wl9_base\firmware\asm_utils.asm", ERROR!   at line 154:
 [E0002]
         Illegal mnemonic specified
        RBIT    R3, R1         ; R3 := reversed high 32 bits of input = low  32 bits of result.

Thank you, Arkady

Anyone? Is it a bug in the toolchain or there is another mnemonic for RBIT? Should I use machine code as a workaround?

.thumb did the trick

Thank you.

Hi Brad Griffis & Arkady Miasnikov,

I have the code with both RBIT instructions and CortexA8 instructions (i.e., thumb2 instruction and cortexA8 instructions).

I followed with .thumb directly in the code it is giving errors with the arm instructions.

ex: .thumb

RBIT R2, R3          ----> now it does not have any error

BNE next         ----> but this instruction is getting error with .thumb directive

so can any one give me the example of code to write both cortexa8 instructions and thumb2 instructions in single function of code.

2. can i use .arm assembler directive in cortexa8 device to work below lines of code in single function.

Thanks,

Vinay