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[S390] Inline assembly cleanup.

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Major cleanup of all s390 inline assemblies. They now have a common
coding style. Quite a few have been shortened, mainly by using register
asm variables. Use of the EX_TABLE macro helps  as well. The atomic ops,
bit ops and locking inlines new use the Q-constraint if a newer gcc
is used.  That results in slightly better code.

Thanks to Christian Borntraeger for proof reading the changes.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky
2006-09-28 16:56:43 +02:00
parent 25d83cbfaa
commit 94c12cc7d1
51 changed files with 1758 additions and 2268 deletions
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11
arch/s390/lib/delay.c
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@@ -27,9 +27,7 @@ void __delay(unsigned long loops)
* yield the megahertz number of the cpu. The important function
* is udelay and that is done using the tod clock. -- martin.
*/
__asm__ __volatile__(
"0: brct %0,0b"
: /* no outputs */ : "r" ((loops/2) + 1));
asm volatile("0: brct %0,0b" : : "d" ((loops/2) + 1));
}
/*
@@ -38,13 +36,12 @@ void __delay(unsigned long loops)
*/
void __udelay(unsigned long usecs)
{
uint64_t start_cc, end_cc;
uint64_t start_cc;
if (usecs == 0)
return;
asm volatile ("STCK %0" : "=m" (start_cc));
start_cc = get_clock();
do {
cpu_relax();
asm volatile ("STCK %0" : "=m" (end_cc));
} while (((end_cc - start_cc)/4096) < usecs);
} while (((get_clock() - start_cc)/4096) < usecs);
}