[Tinycc-devel] The inline assembly clobber for floating point register stack `%st' not implemented?

[YX Hao]

Hi,

From: "Sergey Korshunoff" <address@hidden>
Sent: Monday, January 19, 2015 1:14 AM


> Hi! Another question:  Compiling a nimrod compiler by i386-win-tcc I
> got  the following error:
> /usr/local/lib/win32/include/math.h:541: error: invalid clobber register 
> 'st'

Go into include/math.h:541:

 __CRT_INLINE long __cdecl lrint (double x)
 {
   long retval;
   __asm__ __volatile__             \
     ("fistpl %0"  : "=m" (retval) : "t" (x) : "st");          \
     return retval;
 }

__asm__　__volatile__("Instruction List" : Output : Input : Clobber/Modify);

Guide to Inline Assembly:
http://www.delorie.com/djgpp/doc/brennan/brennan_att_inline_djgpp.html
Clobber List:
http://www.ibiblio.org/gferg/ldp/GCC-Inline-Assembly-HOWTO.html#ss5.3
st:
http://sourceware.org/binutils/docs-2.25/as/i386_002dRegs.html#i386_002dRegs

Anyone know more abount it?