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s390/atomic: use proper constraints

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Use the R,T, and S constraints instead of the Q constraint in atomic
inline assemblies wherever possible. This allows the compiler to
generate better code. (~ -2kb code size).

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Heiko Carstens 2021-03-22 14:08:39 +01:00
parent c8a91c285d
commit ca897bb181
1 changed files with 7 additions and 7 deletions
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14
arch/s390/include/asm/atomic_ops.h
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@ -14,7 +14,7 @@ static inline int __atomic_read(const atomic_t *v)
asm volatile(
" l %0,%1\n"
: "=d" (c) : "Q" (v->counter));
: "=d" (c) : "R" (v->counter));
return c;
}
@ -22,7 +22,7 @@ static inline void __atomic_set(atomic_t *v, int i)
{
asm volatile(
" st %1,%0\n"
: "=Q" (v->counter) : "d" (i));
: "=R" (v->counter) : "d" (i));
}
static inline s64 __atomic64_read(const atomic64_t *v)
@ -31,7 +31,7 @@ static inline s64 __atomic64_read(const atomic64_t *v)
asm volatile(
" lg %0,%1\n"
: "=d" (c) : "Q" (v->counter));
: "=d" (c) : "T" (v->counter));
return c;
}
@ -39,7 +39,7 @@ static inline void __atomic64_set(atomic64_t *v, s64 i)
{
asm volatile(
" stg %1,%0\n"
: "=Q" (v->counter) : "d" (i));
: "=T" (v->counter) : "d" (i));
}
#ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
@ -52,7 +52,7 @@ static inline op_type op_name(op_type val, op_type *ptr) \
asm volatile( \
op_string " %[old],%[val],%[ptr]\n" \
op_barrier \
: [old] "=d" (old), [ptr] "+Q" (*ptr) \
: [old] "=d" (old), [ptr] "+S" (*ptr) \
: [val] "d" (val) : "cc", "memory"); \
return old; \
} \
@ -80,7 +80,7 @@ static __always_inline void op_name(op_type val, op_type *ptr) \
asm volatile( \
op_string " %[ptr],%[val]\n" \
op_barrier \
: [ptr] "+Q" (*ptr) : [val] "i" (val) : "cc", "memory");\
: [ptr] "+S" (*ptr) : [val] "i" (val) : "cc", "memory");\
}
#define __ATOMIC_CONST_OPS(op_name, op_type, op_string) \
@ -131,7 +131,7 @@ static inline long op_name(long val, long *ptr) \
op_string " %[new],%[val]\n" \
" csg %[old],%[new],%[ptr]\n" \
" jl 0b" \
: [old] "=d" (old), [new] "=&d" (new), [ptr] "+Q" (*ptr)\
: [old] "=d" (old), [new] "=&d" (new), [ptr] "+S" (*ptr)\
: [val] "d" (val), "0" (*ptr) : "cc", "memory"); \
return old; \
}