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musl/arch/mips/atomic_arch.h

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overhaul mips atomics for new atomics framework
2016-01-22 00:10:40 +00:00
#define a_ll a_ll
static inline int a_ll(volatile int *p)
refactor internal atomic.h rather than having each arch provide its own atomic.h, there is a new shared atomic.h in src/internal which pulls arch-specific definitions from arc/$(ARCH)/atomic_arch.h. the latter can be extremely minimal, defining only a_cas or new ll/sc type primitives which the shared atomic.h will use to construct everything else. this commit avoids making heavy changes to the individual archs' atomic implementations. definitions which are identical or near-identical to what the new shared atomic.h would produce have been removed, but otherwise the changes made are just hooking up the arch-specific files to the new infrastructure. major changes to take advantage of the new system will come in subsequent commits.
2016-01-21 19:08:54 +00:00
{
overhaul mips atomics for new atomics framework
2016-01-22 00:10:40 +00:00
int v;
__asm__ __volatile__ (
".set push ; .set mips2\n\t"
"ll %0, %1"
"\n\t.set pop"
: "=r"(v) : "m"(*p));
return v;
refactor internal atomic.h rather than having each arch provide its own atomic.h, there is a new shared atomic.h in src/internal which pulls arch-specific definitions from arc/$(ARCH)/atomic_arch.h. the latter can be extremely minimal, defining only a_cas or new ll/sc type primitives which the shared atomic.h will use to construct everything else. this commit avoids making heavy changes to the individual archs' atomic implementations. definitions which are identical or near-identical to what the new shared atomic.h would produce have been removed, but otherwise the changes made are just hooking up the arch-specific files to the new infrastructure. major changes to take advantage of the new system will come in subsequent commits.
2016-01-21 19:08:54 +00:00
}
overhaul mips atomics for new atomics framework
2016-01-22 00:10:40 +00:00
#define a_sc a_sc
static inline int a_sc(volatile int *p, int v)
refactor internal atomic.h rather than having each arch provide its own atomic.h, there is a new shared atomic.h in src/internal which pulls arch-specific definitions from arc/$(ARCH)/atomic_arch.h. the latter can be extremely minimal, defining only a_cas or new ll/sc type primitives which the shared atomic.h will use to construct everything else. this commit avoids making heavy changes to the individual archs' atomic implementations. definitions which are identical or near-identical to what the new shared atomic.h would produce have been removed, but otherwise the changes made are just hooking up the arch-specific files to the new infrastructure. major changes to take advantage of the new system will come in subsequent commits.
2016-01-21 19:08:54 +00:00
{
overhaul mips atomics for new atomics framework
2016-01-22 00:10:40 +00:00
int r;
__asm__ __volatile__ (
".set push ; .set mips2\n\t"
"sc %0, %1"
"\n\t.set pop"
: "=r"(r), "=m"(*p) : "0"(v) : "memory");
return r;
refactor internal atomic.h rather than having each arch provide its own atomic.h, there is a new shared atomic.h in src/internal which pulls arch-specific definitions from arc/$(ARCH)/atomic_arch.h. the latter can be extremely minimal, defining only a_cas or new ll/sc type primitives which the shared atomic.h will use to construct everything else. this commit avoids making heavy changes to the individual archs' atomic implementations. definitions which are identical or near-identical to what the new shared atomic.h would produce have been removed, but otherwise the changes made are just hooking up the arch-specific files to the new infrastructure. major changes to take advantage of the new system will come in subsequent commits.
2016-01-21 19:08:54 +00:00
}
overhaul mips atomics for new atomics framework
2016-01-22 00:10:40 +00:00
#define a_barrier a_barrier
static inline void a_barrier()
refactor internal atomic.h rather than having each arch provide its own atomic.h, there is a new shared atomic.h in src/internal which pulls arch-specific definitions from arc/$(ARCH)/atomic_arch.h. the latter can be extremely minimal, defining only a_cas or new ll/sc type primitives which the shared atomic.h will use to construct everything else. this commit avoids making heavy changes to the individual archs' atomic implementations. definitions which are identical or near-identical to what the new shared atomic.h would produce have been removed, but otherwise the changes made are just hooking up the arch-specific files to the new infrastructure. major changes to take advantage of the new system will come in subsequent commits.
2016-01-21 19:08:54 +00:00
{
overhaul mips atomics for new atomics framework
2016-01-22 00:10:40 +00:00
/* mips2 sync, but using too many directives causes
* gcc not to inline it, so encode with .long instead. */
__asm__ __volatile__ (".long 0xf" : : : "memory");
#if 0
__asm__ __volatile__ (
".set push ; .set mips2 ; sync ; .set pop"
: : : "memory");
#endif
refactor internal atomic.h rather than having each arch provide its own atomic.h, there is a new shared atomic.h in src/internal which pulls arch-specific definitions from arc/$(ARCH)/atomic_arch.h. the latter can be extremely minimal, defining only a_cas or new ll/sc type primitives which the shared atomic.h will use to construct everything else. this commit avoids making heavy changes to the individual archs' atomic implementations. definitions which are identical or near-identical to what the new shared atomic.h would produce have been removed, but otherwise the changes made are just hooking up the arch-specific files to the new infrastructure. major changes to take advantage of the new system will come in subsequent commits.
2016-01-21 19:08:54 +00:00
}
overhaul mips atomics for new atomics framework
2016-01-22 00:10:40 +00:00
#define a_pre_llsc a_barrier
#define a_post_llsc a_barrier