From: ratheesh kannoth <ratheesh.ksz@gmail.com>
To: linux-c-programming@vger.kernel.org, gcc-help@gcc.gnu.org
Subject: c inline assembly
Date: Sat, 18 Feb 2012 11:31:12 +0530 [thread overview]
Message-ID: <CAGZFCEH_NWJQid+DgOGrDp0nAS6odH2fLamT1k-vWP1ceAiMzQ@mail.gmail.com> (raw)
In-Reply-To: <CAGZFCEEaJ7ZsNAmWCF-nDtsjs70U7fqEVvTXEaCt9Tmk1dcemQ@mail.gmail.com>
I am using gcc on a 32bit intel machine. i have defined an inline function.
This function is inline . what all registers needs to pushed and
poped in the inline assembly so that the functions wont
disturb the registers in the function ( in which it is C inlined ).
inline unsigned long hello(unsigned long a)
{
int b;
asm ("movl %1, %%eax;
" movl %1, %%ebx;
"movl %1, %%ecx;
"movl %1, %%esi;
"movl %1, %%edi;
"movl %%eax, %0;"
:"=r"(b) /* output */
:"r"(a) /* input */
);
}
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next parent reply other threads:[~2012-02-18 6:01 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAGZFCEEaJ7ZsNAmWCF-nDtsjs70U7fqEVvTXEaCt9Tmk1dcemQ@mail.gmail.com>
2012-02-18 6:01 ` ratheesh kannoth [this message]
2012-02-19 5:14 ` c inline assembly Ian Lance Taylor
2012-02-19 16:46 ` Gedare Bloom
2012-02-18 6:26 Vladimir Murzin
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