[ECOS] Question of ARM and thumb mode switch in vectors.S

Mon, 27 Nov 2006 13:24:14 -0800 

I have a question about the mode switch macro, which I listed below,
in vectors.S.
What is ## mean in
ldr     _r_,=_l_  ## f  ?
Is f a constant or _f_? Thanks,

Frank

// Call thumb function from ARM mode, return to ARM
// mode afterwards
#define THUMB_CALL(_r_, _l_, _f_)                \
       ldr     _r_,=_f_+1                      ;\
       mov     lr,pc                           ;\
       bx      _r_                             ;\
       .pool                                   ;\
       .code   16                              ;\
       .thumb_func                             ;\
       ldr     _r_,=_l_  ## f                  ;\
       bx      _r_                             ;\
       .pool                                   ;\
       .code   32                              ;\
_l_:

--
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss

Reply via email to