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  1. Embedded Software & Tools
  2. EXT_EP-10350

_enable_IRQ in ti_compatibility.h only supports Cortex-M devices

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      Use the attached file.c to run these commands ....

      C:\Userdata\mytemp>type file.c
      #include <ti_compatibility.h>
      
      void fxn()
      {
         _enable_IRQ();
      }
      
      C:\Userdata\mytemp>tiarmclang -g -mcpu=cortex-m0 -c file.c
      
      C:\Userdata\mytemp>tiarmobjdump -dS file.o
      
      file.o: file format elf32-littlearm
      
      
      Disassembly of section .text.fxn:
      
      00000000 <fxn>:
      ; {
             0: 82 b0         sub     sp, #8
             2: 00 20         movs    r0, #0
      ;     uint32_t res = 0;
             4: 01 90         str     r0, [sp, #4]
      ;     __asm volatile ("MRS %0, PRIMASK" :  "=r" (res) : : );
             6: ef f3 10 80   mrs     r0, primask
             a: 01 90         str     r0, [sp, #4]
      ;     return res;
             c: 01 98         ldr     r0, [sp, #4]
      ;     uint32_t primask = __get_PRIMASK();
             e: 00 90         str     r0, [sp]
      ;     __asm volatile ("CPSIE I" : : : );
            10: 62 b6         cpsie i
      ; }
            12: 02 b0         add     sp, #8
            14: 70 47         bx      lr
      
      C:\Userdata\mytemp>tiarmclang -g -mcpu=cortex-r4 -c file.c
      
      C:\Userdata\mytemp>tiarmobjdump -dS file.o
      
      file.o: file format elf32-littlearm
      
      
      Disassembly of section .text.fxn:
      
      00000000 <fxn>:
      ; }
             0: 1e ff 2f e1   bx      lr
      

      The source file invokes the intrinsic _enable_IRQ, which is supported by the TI proprietary ARM compiler armcl. These commands show that when built for a Cortex-M0 device, correct code is generated. When built for Cortex-R4 devices, nothing is generated.

      Note the lack of diagnostics that would let a user know something is wrong.

            syncuser TI User
            syncuser TI User
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              Created:
              Updated:
              Resolved: