Date: Thu, 14 Jun 2007 14:11:10 -0700 From: "Patil, Kiran" <kiran.patil@intel.com> To: <freebsd-questions@freebsd.org> Cc: "Patil, Kiran" <kiran.patil@intel.com> Subject: Need help with GNU assembly Message-ID: <4AFE4AEEFA305C4BB82F73F4D819506001B50C43@orsmsx420.amr.corp.intel.com>
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Hi All,
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I am trying to use GNU assembly. I am trying simple thing such as ,
moving content of memory location into general purpose register (ax).
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I have following code :
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struct context {
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unsigned long mask[8];
} CONTEXT;
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int main()
{
CONTEXT sr;
sr.mask[5] =3D 0x8FED;
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__asm ( "movw %0, %ax" : : "m" (*(unsigned
short*)sr.mask[5]) );
return 0;
}
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Compiler complains with error "bad substitution directive in asm
instruction".
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I tried changing the code something like this :
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__asm ( "movw %0, %ax" : : "m" (*(unsigned short*)sr.mask+5) );
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Still error is same, then I tried following:
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Unsigned short* ptemp =3D &sr.mask[5];
__asm ( "movw %0, %ax" : : "m" (*(unsigned short*)ptemp) );
But still no luck, compiler reported same error as mentioned above
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Any help is appreciated. Please let me know where I am mistake.
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Thanks,
-- Kiran P.
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