Incorrect results under Keil C51

[TianpeiLee]

hi ,

I am trying to port it to 8051, but the calculation output is always incorrect. Can anyone provide a 51 project that can run normally, or give me some advice?

I have changed the definition of data types, and the conflicts between some variables and C51 keywords.

[spth]

The bug here is that Coremark requires sizeof(ee_ptr_int) == sizeof(ee_u8 *); instead it should require sizeof(ee_ptr_int) >= sizeof(ee_u8 *).

Fix: change in core_portme.c:

if (sizeof(ee_ptr_int) != sizeof(ee_u8 *)) {
		ee_printf("ERROR! Please define ee_ptr_int to a type that holds a pointer!\n");
	}

to

if (sizeof(ee_ptr_int) < sizeof(ee_u8 *)) {
		ee_printf("ERROR! Please define ee_ptr_int to a type that holds a pointer!\n");
	}

Since compilers targeting the MCS-51 tend to have uintptr_t as 32 bits, but void * as 24 bits, you'll run into this bug there (I don't use Keil, but ran into the same problem using SDCC).

[joseph-yiu]

Thanks for the details. I will look into this in a couple of weeks time.
Joseph