problem in starting the project

I read the document that showed me how to create a new project it ask me to write this function in main
void SystemInit(void)
{ // Grant coprocessor access // This is required since TM4C123G has // a floating point coprocessor SCB->CPACR |= 0x00F00000;
}

but i don't refer the register like mentioned above i refer the register SCB_CPACR_R. I donot understand how to do it . Please help.

I read the document that showed me how to create a new project it ask me to write this function in main
void SystemInit(void)
{ // Grant coprocessor access // This is required since TM4C123G has // a floating point coprocessor SCB->CPACR |= 0x00F00000;
}

but i don't refer the register like mentioned above i refer the register SCB_CPACR_R. I donot understand how to do it . Please help.

So do you refer to it differently to purposefully make it more difficult for yourself?

Why wouldn't you just bring in the right #include file in the CMSIS model so the SCB structure was suitably defined?

What's SCB_CPACR_R defined as? A pointer? An absolute address of the register?

Let's try a few standard C constructs :

 SCB->CPACR |= 0x00F00000; // CMSIS Structure

 SCB_CPACR_R |= 0x00F00000; // Directly?

 *SCB_CPACR_R |= 0x00F00000; // A Pointer?

 *((unit32_t *)SCB_CPACR_R) |= 0x00F00000; // An Address ?

SCB_CPACR_R is referred as an absolute address.

SCB_CPACR_R is referred as an absolute address of the register.

So *((uint32_t *)SCB_CPACR_R) |= 0x00F00000; might provide you with an avenue to write the register as a 32-bit word

You could also perhaps tell the tools not to use FPU code, and then it wouldn't be needed.

Anyway the simulator support seems to have been overwhelmed with the number/variety of parts now available. Unless there's a very compelling reason not to use real hardware via a low cost break-out board, think about not depending on the simulator.