topic Re: Utilizing 64-bit variables with MC56F84XXX in Digital Signal Controllers

Utilizing 64-bit variables with MC56F84XXX

brandonkamphaus — Thu, 08 May 2014 20:40:11 GMT

I want to use 64-bit variables to handle storing some values, but I am having issues.

I am able to declare the variable as a long long int without problems, but if I try to use that value, I find that only 32 bits are being used and any efforts to hard code 64-bit values return the error of number is out of range.

I read on another Freescale forum that long long variables are treated like 32-bit numbers by default, but I attempted to enable 64-bit variables through using the pragma slld with the _slld suffixed libraries and I have added *(ll_engine.text) to the code section of the linker, but it doesn't appear to change anything.

I think that I might be missing a step to configure enabling 64-bit support, but I don't see what can be causing it. Any thoughts?

I am using:

-Target: MC56F84763

-CodeWarrior for Microcontrollers

Version: 10.5

Build Id: 130916

Re: Utilizing 64-bit variables with MC56F84XXX

johnlwinters — Mon, 19 May 2014 17:58:30 GMT

Hi,

From our release notes:

Date: Aug 29, 2007
Build 1033, R8.2

* New features:

- compiler library has support for C99 support functions, including trigonometric,
hyperbolic, power, absolute value functions, exponential and logarithmic functions.
NOTE: in order to use double precision function versions, one has to make use of
libraries that support long long and double data types (name includes SLLD) and
of #pragma slld on to compile the project

- compiler has support for new 64-bit integer and fractional intrinsics
( __LL_deposit_h, __LL_deposit_l, __LL_extract_h, __LL_extract_l, __LL_abs,
    __LL_negate, __LL_add, __LL_sub, __LL_round, __LL_LL_mult_int, __LL_mult_int,
    __LL_LL_mac_int, __LL_mac_int, __LL_msu_int, __LL_LL_msu_int, __LL_mult_ls_int
    __LL_LL_mult, __LL_mult, __LL_LL_mac, __LL_mac, __LL_msu, __LL_LL_msu,
    __LL_mult_ls, __LL_div_int, __LL_div_s4q_int), whose definitions are in
intrinsics_LL_56800E.h file

Re: Utilizing 64-bit variables with MC56F84XXX

fukefeng — Fri, 12 Sep 2014 07:10:33 GMT

Hi：

I had save the simulator problem yet。

Except use the SLLD lib and #pragma slld on ，you must check that　properties ->c/c++building->Setting->tools settings->dsc compiler->processer->Generator elf file for 56800EX core，because in some version of CW （like 10.2），it didn't had this selection，if you moved the project form that version