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(atomic_increment_and_test): Define. (atomic_decrement_and_test): Fix test.

This commit is contained in:
Andreas Schwab 2003-03-31 16:01:09 +00:00
parent 0a9d1b3b81
commit e8b113e517
1 changed files with 39 additions and 5 deletions
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44
sysdeps/m68k/m68020/bits/atomic.h
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@ -179,18 +179,52 @@ typedef uintmax_t uatomic_max_t;
} \
})
#define atomic_decrement_and_test(mem) \
#define atomic_increment_and_test(mem) \
({ char __result; \
if (sizeof (*(mem)) == 1) \
__asm __volatile ("subq%.b %#1,%1; scs %0" \
__asm __volatile ("addq%.b %#1,%1; seq %0" \
: "=dm" (__result), "=m" (*(mem)) \
: "1" (*(mem))); \
else if (sizeof (*(mem)) == 2) \
__asm __volatile ("subq%.w %#1,%1; scs %0" \
__asm __volatile ("addq%.w %#1,%1; seq %0" \
: "=dm" (__result), "=m" (*(mem)) \
: "1" (*(mem))); \
else if (sizeof (*(mem)) == 4) \
__asm __volatile ("subq%.l %#1,%1; scs %0" \
__asm __volatile ("addq%.l %#1,%1; seq %0" \
: "=dm" (__result), "=m" (*(mem)) \
: "1" (*(mem))); \
else \
{ \
__typeof (mem) __memp = (mem); \
__typeof (*(mem)) __oldval = *__memp; \
__typeof (*(mem)) __temp; \
__asm __volatile ("1: move%.l %1,%2;" \
" move%.l %R1,%R2;" \
" addq%.l %#1,%2;" \
" addx%.l %5,%R2;" \
" seq %0;" \
" cas2%.l %1:%R1,%2:%R2,(%3):(%4);" \
" jbne 1b" \
: "=&dm" (__result), "=d" (__oldval), \
"=&d" (__temp) \
: "r" (__memp), "r" ((char *) __memp + 4), \
"d" (0), "1" (__oldval) \
: "memory"); \
} \
__result; })
#define atomic_decrement_and_test(mem) \
({ char __result; \
if (sizeof (*(mem)) == 1) \
__asm __volatile ("subq%.b %#1,%1; seq %0" \
: "=dm" (__result), "=m" (*(mem)) \
: "1" (*(mem))); \
else if (sizeof (*(mem)) == 2) \
__asm __volatile ("subq%.w %#1,%1; seq %0" \
: "=dm" (__result), "=m" (*(mem)) \
: "1" (*(mem))); \
else if (sizeof (*(mem)) == 4) \
__asm __volatile ("subq%.l %#1,%1; seq %0" \
: "=dm" (__result), "=m" (*(mem)) \
: "1" (*(mem))); \
else \
@ -202,7 +236,7 @@ typedef uintmax_t uatomic_max_t;
" move%.l %R1,%R2;" \
" subq%.l %#1,%2;" \
" subx%.l %5,%R2;" \
" scs %0;" \
" seq %0;" \
" cas2%.l %1:%R1,%2:%R2,(%3):(%4);" \
" jbne 1b" \
: "=&dm" (__result), "=d" (__oldval), \