Dear All, I am not able to compile the assembly code in port.c file for mcf5272 port. I am compiling using Codewarrior C Compiler. Can anyone guide me as to what can be done. Some of the code i am listing below. asm volatile (    "move.l %%d1,-8(%%sp) nt" "clr.l %%d1        nt"    "move.w %%sr,%%d1    nt"    "ori.l %0,%%d1        nt"    "andi.l %1,%%d1        nt"    "move.l %%d1,%%sp@-    nt"    "move.l -4(%%sp),%%d1    nt"     : /* no output */            : "n" (EXSF_FORMAT(4) | EXSF_VECTOR(VECTOR_TMR0)),   "n" (~STATUS_I(7)) ); asm volatile (    "move.l %d0,%sp@- nt"    "move.l %d1,%sp@-    nt"    "move.l %d2,%sp@-    nt"    "move.l %d3,%sp@-    nt"    "move.l %d4,%sp@-    nt"    "move.l %d5,%sp@-    nt"    "move.l %d6,%sp@-    nt"    "move.l %d7,%sp@-    nt"    "move.l %a0,%sp@-    nt"    "move.l %a1,%sp@-    nt"    "move.l %a2,%sp@-    nt"    "move.l %a3,%sp@-    nt"    "move.l %a4,%sp@-    nt"    "move.l %a5,%sp@-    nt"    "move.l %a6,%sp@-    nt"    "move.l pxCurrentTCB,%a0    nt"    "move.l %sp,(%a0)        nt" ); Regards Vivek Agarwal

I’m not familiar with the ColdFire port but might be able to help if you can provide some of the compiler error messages. Which compiler are you using?  The port was written with gcc-m68k v2.95.3.

I am using Metrowerks Codewarrior IDE and C Compiler for Coldfire for compiling and debugging. the list of error are :- Error   : illegal use of asm inline function port.c line 200   ove.l %sp@+,%d2    nt" "move.l %sp@+,%d1    nt" "move.l %sp@+,%d0    nt" ); Error   : illegal use of asm inline function port.c line 204    asm volatile ( "rte" ); Error   : illegal use of asm inline function port.c line 228    asm volatile ( "unlk %fp" ); Error   : illegal use of asm inline function port.c line 233    asm volatile ( "move.l %%d1,-8(%%sp)  nt" Error   : ‘;’ expected port.c line 241        : "n" (EXSF_FORMAT(4) | EXSF_VECTOR(VECTOR_TMR0)), Error   : call of non-function port.c line 242          "n" (~STATUS_I(7)) ); Error   : illegal use of asm inline function port.c line 244   %a6,%sp@-    nt" "move.l pxCurrentTCB,%a0  nt" "move.l %sp,(%a0)    nt" ); Error   : illegal use of asm inline function port.c line 246   ove.l %sp@+,%d2    nt" "move.l %sp@+,%d1    nt" "move.l %sp@+,%d0    nt" ); Error   : illegal use of asm inline function port.c line 248    asm volatile ( "rte" ); Error   : illegal use of asm inline function port.c line 271    asm volatile ( "move.l %%a7,%%d1 nt" Error   : illegal use of asm inline function port.c line 305    asm volatile ( "unlk %fp" ); Error   : illegal use of asm inline function port.c line 307   %a6,%sp@-    nt" "move.l pxCurrentTCB,%a0  nt" "move.l %sp,(%a0)    nt" ); Error   : illegal use of asm inline function port.c line 310   ove.l %sp@+,%d2    nt" "move.l %sp@+,%d1    nt" "move.l %sp@+,%d0    nt" ); Error   : illegal use of asm inline function port.c line 312    asm volatile ( "rte" );

The syntax is GCC specific and will have to be converted to the syntax for your compiler.

Any idea where can i get some info on this conversion. also is there any tools anybody knows of. Any idea what the last 4 lines of the below inline mean starting from : asm volatile ( "move.l %%d1,-8(%%sp) nt" "clr.l %%d1 nt" "move.w %%sr,%%d1 nt" "ori.l %0,%%d1 nt" "andi.l %1,%%d1 nt" "move.l %%d1,%%sp@- nt" "move.l -4(%%sp),%%d1 nt" : /* no output */ : "n" (EXSF_FORMAT(4) | EXSF_VECTOR(VECTOR_TMR0)), "n" (~STATUS_I(7)) ); also what the last line in below routine mean asm volatile (    "move.l %%a7,%%d1 nt"    "move.l %0,%%a7        nt"    "movec.l %%a7,%%vbr    nt"    "move.l %%d1,%%a7    nt"    : : "n" (VBR) : "d1" ); Basically the use of : in inline assembly is unknow to me. it would great if u could tell the above. i can then write the same according to my compiler.

Maybe this helps: http://gcc.gnu.org/onlinedocs/gcc-3.4.3/gcc/Constraints.html#index-operand-constraints_002c-_0040code_007basm_007d-1696 Here there is documentation for some of the asm features.  I know the arm port uses the ‘m’ constraint as: asm volatile ( "LDR R0, %0" : : "m" (pxCurrentTCB) ); to get the address of pxCurrentTCB. The GCC inline assembler is very powerful and therfore unfortunately complex. Also: http://gcc.gnu.org/onlinedocs/gcc-3.4.3/gcc/Extended-Asm.html#Extended-Asm

any idea what the below code does what is fp. it is taken from port.c of mcf5272 port. #ifndef OMIT_FRAME_POINTER     asm volatile ( "unlk %fp" ); #endif