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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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include/asm-s390/rwsem.h
+119 -119
View File
@@ -122,23 +122,23 @@ static inline void __down_read(struct rw_semaphore *sem)
{
signed long old, new;
__asm__ __volatile__(
asm volatile(
#ifndef __s390x__
" l %0,0(%3)\n"
"0: lr %1,%0\n"
" ahi %1,%5\n"
" cs %0,%1,0(%3)\n"
" jl 0b"
" l %0,0(%3)\n"
"0: lr %1,%0\n"
" ahi %1,%5\n"
" cs %0,%1,0(%3)\n"
" jl 0b"
#else /* __s390x__ */
" lg %0,0(%3)\n"
"0: lgr %1,%0\n"
" aghi %1,%5\n"
" csg %0,%1,0(%3)\n"
" jl 0b"
" lg %0,0(%3)\n"
"0: lgr %1,%0\n"
" aghi %1,%5\n"
" csg %0,%1,0(%3)\n"
" jl 0b"
#endif /* __s390x__ */
: "=&d" (old), "=&d" (new), "=m" (sem->count)
: "=&d" (old), "=&d" (new), "=m" (sem->count)
: "a" (&sem->count), "m" (sem->count),
"i" (RWSEM_ACTIVE_READ_BIAS) : "cc", "memory" );
"i" (RWSEM_ACTIVE_READ_BIAS) : "cc", "memory");
if (old < 0)
rwsem_down_read_failed(sem);
}
@@ -150,27 +150,27 @@ static inline int __down_read_trylock(struct rw_semaphore *sem)
{
signed long old, new;
__asm__ __volatile__(
asm volatile(
#ifndef __s390x__
" l %0,0(%3)\n"
"0: ltr %1,%0\n"
" jm 1f\n"
" ahi %1,%5\n"
" cs %0,%1,0(%3)\n"
" jl 0b\n"
" l %0,0(%3)\n"
"0: ltr %1,%0\n"
" jm 1f\n"
" ahi %1,%5\n"
" cs %0,%1,0(%3)\n"
" jl 0b\n"
"1:"
#else /* __s390x__ */
" lg %0,0(%3)\n"
"0: ltgr %1,%0\n"
" jm 1f\n"
" aghi %1,%5\n"
" csg %0,%1,0(%3)\n"
" jl 0b\n"
" lg %0,0(%3)\n"
"0: ltgr %1,%0\n"
" jm 1f\n"
" aghi %1,%5\n"
" csg %0,%1,0(%3)\n"
" jl 0b\n"
"1:"
#endif /* __s390x__ */
: "=&d" (old), "=&d" (new), "=m" (sem->count)
: "=&d" (old), "=&d" (new), "=m" (sem->count)
: "a" (&sem->count), "m" (sem->count),
"i" (RWSEM_ACTIVE_READ_BIAS) : "cc", "memory" );
"i" (RWSEM_ACTIVE_READ_BIAS) : "cc", "memory");
return old >= 0 ? 1 : 0;
}
@@ -182,23 +182,23 @@ static inline void __down_write_nested(struct rw_semaphore *sem, int subclass)
signed long old, new, tmp;
tmp = RWSEM_ACTIVE_WRITE_BIAS;
__asm__ __volatile__(
asm volatile(
#ifndef __s390x__
" l %0,0(%3)\n"
"0: lr %1,%0\n"
" a %1,%5\n"
" cs %0,%1,0(%3)\n"
" jl 0b"
" l %0,0(%3)\n"
"0: lr %1,%0\n"
" a %1,%5\n"
" cs %0,%1,0(%3)\n"
" jl 0b"
#else /* __s390x__ */
" lg %0,0(%3)\n"
"0: lgr %1,%0\n"
" ag %1,%5\n"
" csg %0,%1,0(%3)\n"
" jl 0b"
" lg %0,0(%3)\n"
"0: lgr %1,%0\n"
" ag %1,%5\n"
" csg %0,%1,0(%3)\n"
" jl 0b"
#endif /* __s390x__ */
: "=&d" (old), "=&d" (new), "=m" (sem->count)
: "=&d" (old), "=&d" (new), "=m" (sem->count)
: "a" (&sem->count), "m" (sem->count), "m" (tmp)
: "cc", "memory" );
: "cc", "memory");
if (old != 0)
rwsem_down_write_failed(sem);
}
@@ -215,24 +215,24 @@ static inline int __down_write_trylock(struct rw_semaphore *sem)
{
signed long old;
__asm__ __volatile__(
asm volatile(
#ifndef __s390x__
" l %0,0(%2)\n"
"0: ltr %0,%0\n"
" jnz 1f\n"
" cs %0,%4,0(%2)\n"
" jl 0b\n"
" l %0,0(%2)\n"
"0: ltr %0,%0\n"
" jnz 1f\n"
" cs %0,%4,0(%2)\n"
" jl 0b\n"
#else /* __s390x__ */
" lg %0,0(%2)\n"
"0: ltgr %0,%0\n"
" jnz 1f\n"
" csg %0,%4,0(%2)\n"
" jl 0b\n"
" lg %0,0(%2)\n"
"0: ltgr %0,%0\n"
" jnz 1f\n"
" csg %0,%4,0(%2)\n"
" jl 0b\n"
#endif /* __s390x__ */
"1:"
: "=&d" (old), "=m" (sem->count)
: "=&d" (old), "=m" (sem->count)
: "a" (&sem->count), "m" (sem->count),
"d" (RWSEM_ACTIVE_WRITE_BIAS) : "cc", "memory" );
"d" (RWSEM_ACTIVE_WRITE_BIAS) : "cc", "memory");
return (old == RWSEM_UNLOCKED_VALUE) ? 1 : 0;
}
@@ -243,24 +243,24 @@ static inline void __up_read(struct rw_semaphore *sem)
{
signed long old, new;
__asm__ __volatile__(
asm volatile(
#ifndef __s390x__
" l %0,0(%3)\n"
"0: lr %1,%0\n"
" ahi %1,%5\n"
" cs %0,%1,0(%3)\n"
" jl 0b"
" l %0,0(%3)\n"
"0: lr %1,%0\n"
" ahi %1,%5\n"
" cs %0,%1,0(%3)\n"
" jl 0b"
#else /* __s390x__ */
" lg %0,0(%3)\n"
"0: lgr %1,%0\n"
" aghi %1,%5\n"
" csg %0,%1,0(%3)\n"
" jl 0b"
" lg %0,0(%3)\n"
"0: lgr %1,%0\n"
" aghi %1,%5\n"
" csg %0,%1,0(%3)\n"
" jl 0b"
#endif /* __s390x__ */
: "=&d" (old), "=&d" (new), "=m" (sem->count)
: "=&d" (old), "=&d" (new), "=m" (sem->count)
: "a" (&sem->count), "m" (sem->count),
"i" (-RWSEM_ACTIVE_READ_BIAS)
: "cc", "memory" );
: "cc", "memory");
if (new < 0)
if ((new & RWSEM_ACTIVE_MASK) == 0)
rwsem_wake(sem);
@@ -274,23 +274,23 @@ static inline void __up_write(struct rw_semaphore *sem)
signed long old, new, tmp;
tmp = -RWSEM_ACTIVE_WRITE_BIAS;
__asm__ __volatile__(
asm volatile(
#ifndef __s390x__
" l %0,0(%3)\n"
"0: lr %1,%0\n"
" a %1,%5\n"
" cs %0,%1,0(%3)\n"
" jl 0b"
" l %0,0(%3)\n"
"0: lr %1,%0\n"
" a %1,%5\n"
" cs %0,%1,0(%3)\n"
" jl 0b"
#else /* __s390x__ */
" lg %0,0(%3)\n"
"0: lgr %1,%0\n"
" ag %1,%5\n"
" csg %0,%1,0(%3)\n"
" jl 0b"
" lg %0,0(%3)\n"
"0: lgr %1,%0\n"
" ag %1,%5\n"
" csg %0,%1,0(%3)\n"
" jl 0b"
#endif /* __s390x__ */
: "=&d" (old), "=&d" (new), "=m" (sem->count)
: "=&d" (old), "=&d" (new), "=m" (sem->count)
: "a" (&sem->count), "m" (sem->count), "m" (tmp)
: "cc", "memory" );
: "cc", "memory");
if (new < 0)
if ((new & RWSEM_ACTIVE_MASK) == 0)
rwsem_wake(sem);
@@ -304,23 +304,23 @@ static inline void __downgrade_write(struct rw_semaphore *sem)
signed long old, new, tmp;
tmp = -RWSEM_WAITING_BIAS;
__asm__ __volatile__(
asm volatile(
#ifndef __s390x__
" l %0,0(%3)\n"
"0: lr %1,%0\n"
" a %1,%5\n"
" cs %0,%1,0(%3)\n"
" jl 0b"
" l %0,0(%3)\n"
"0: lr %1,%0\n"
" a %1,%5\n"
" cs %0,%1,0(%3)\n"
" jl 0b"
#else /* __s390x__ */
" lg %0,0(%3)\n"
"0: lgr %1,%0\n"
" ag %1,%5\n"
" csg %0,%1,0(%3)\n"
" jl 0b"
" lg %0,0(%3)\n"
"0: lgr %1,%0\n"
" ag %1,%5\n"
" csg %0,%1,0(%3)\n"
" jl 0b"
#endif /* __s390x__ */
: "=&d" (old), "=&d" (new), "=m" (sem->count)
: "=&d" (old), "=&d" (new), "=m" (sem->count)
: "a" (&sem->count), "m" (sem->count), "m" (tmp)
: "cc", "memory" );
: "cc", "memory");
if (new > 1)
rwsem_downgrade_wake(sem);
}
@@ -332,23 +332,23 @@ static inline void rwsem_atomic_add(long delta, struct rw_semaphore *sem)
{
signed long old, new;
__asm__ __volatile__(
asm volatile(
#ifndef __s390x__
" l %0,0(%3)\n"
"0: lr %1,%0\n"
" ar %1,%5\n"
" cs %0,%1,0(%3)\n"
" jl 0b"
" l %0,0(%3)\n"
"0: lr %1,%0\n"
" ar %1,%5\n"
" cs %0,%1,0(%3)\n"
" jl 0b"
#else /* __s390x__ */
" lg %0,0(%3)\n"
"0: lgr %1,%0\n"
" agr %1,%5\n"
" csg %0,%1,0(%3)\n"
" jl 0b"
" lg %0,0(%3)\n"
"0: lgr %1,%0\n"
" agr %1,%5\n"
" csg %0,%1,0(%3)\n"
" jl 0b"
#endif /* __s390x__ */
: "=&d" (old), "=&d" (new), "=m" (sem->count)
: "=&d" (old), "=&d" (new), "=m" (sem->count)
: "a" (&sem->count), "m" (sem->count), "d" (delta)
: "cc", "memory" );
: "cc", "memory");
}
/*
@@ -358,23 +358,23 @@ static inline long rwsem_atomic_update(long delta, struct rw_semaphore *sem)
{
signed long old, new;
__asm__ __volatile__(
asm volatile(
#ifndef __s390x__
" l %0,0(%3)\n"
"0: lr %1,%0\n"
" ar %1,%5\n"
" cs %0,%1,0(%3)\n"
" jl 0b"
" l %0,0(%3)\n"
"0: lr %1,%0\n"
" ar %1,%5\n"
" cs %0,%1,0(%3)\n"
" jl 0b"
#else /* __s390x__ */
" lg %0,0(%3)\n"
"0: lgr %1,%0\n"
" agr %1,%5\n"
" csg %0,%1,0(%3)\n"
" jl 0b"
" lg %0,0(%3)\n"
"0: lgr %1,%0\n"
" agr %1,%5\n"
" csg %0,%1,0(%3)\n"
" jl 0b"
#endif /* __s390x__ */
: "=&d" (old), "=&d" (new), "=m" (sem->count)
: "=&d" (old), "=&d" (new), "=m" (sem->count)
: "a" (&sem->count), "m" (sem->count), "d" (delta)
: "cc", "memory" );
: "cc", "memory");
return new;
}