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| author | Ulrich Drepper <drepper@redhat.com> | 2004-06-03 16:04:11 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2004-06-03 16:04:11 +0000 |
| commit | 75fcceded2cfc65e4879521fff4db6a620a96363 (patch) | |
| tree | 6d0763c5a2e4b59ece4d57a87232d435d15a5f7f /sysdeps/i386 | |
| parent | 322861e8b62dbca030a66f9ab37e6688b223c65f (diff) | |
| download | glibc-75fcceded2cfc65e4879521fff4db6a620a96363.tar.gz glibc-75fcceded2cfc65e4879521fff4db6a620a96363.tar.xz glibc-75fcceded2cfc65e4879521fff4db6a620a96363.zip | |
Update.
2004-06-03 Ulrich Drepper <drepper@redhat.com> * sysdeps/i386/i486/bits/atomic.h: Optimize a bit.
Diffstat (limited to 'sysdeps/i386')
| -rw-r--r-- | sysdeps/i386/i486/bits/atomic.h | 64 |
1 files changed, 34 insertions, 30 deletions
diff --git a/sysdeps/i386/i486/bits/atomic.h b/sysdeps/i386/i486/bits/atomic.h index 9587eaa87a..7f3d534483 100644 --- a/sysdeps/i386/i486/bits/atomic.h +++ b/sysdeps/i386/i486/bits/atomic.h @@ -140,30 +140,31 @@ typedef uintmax_t uatomic_max_t; #define atomic_exchange_and_add(mem, value) \ - ({ __typeof (*mem) result; \ - __typeof (value) addval = (value); \ + ({ __typeof (*mem) __result; \ + __typeof (value) __addval = (value); \ if (sizeof (*mem) == 1) \ __asm __volatile (LOCK_PREFIX "xaddb %b0, %1" \ - : "=r" (result), "=m" (*mem) \ - : "0" (addval), "m" (*mem)); \ + : "=r" (__result), "=m" (*mem) \ + : "0" (__addval), "m" (*mem)); \ else if (sizeof (*mem) == 2) \ __asm __volatile (LOCK_PREFIX "xaddw %w0, %1" \ - : "=r" (result), "=m" (*mem) \ - : "0" (addval), "m" (*mem)); \ + : "=r" (__result), "=m" (*mem) \ + : "0" (__addval), "m" (*mem)); \ else if (sizeof (*mem) == 4) \ __asm __volatile (LOCK_PREFIX "xaddl %0, %1" \ - : "=r" (result), "=m" (*mem) \ - : "0" (addval), "m" (*mem)); \ + : "=r" (__result), "=m" (*mem) \ + : "0" (__addval), "m" (*mem)); \ else \ { \ - __typeof (mem) memp = (mem); \ + __typeof (mem) __memp = (mem); \ + __typeof (*mem) __tmpval; \ + __result = *__memp; \ do \ - result = *memp; \ - while (__arch_compare_and_exchange_val_64_acq (memp, \ - result + addval, \ - result) == result); \ + __tmpval = __result; \ + while ((__result = __arch_compare_and_exchange_val_64_acq \ + (__memp, __result + __addval, __result)) == __tmpval); \ } \ - result; }) + __result; }) #define atomic_add(mem, value) \ @@ -185,13 +186,14 @@ typedef uintmax_t uatomic_max_t; : "ir" (value), "m" (*mem)); \ else \ { \ - __typeof (value) addval = (value); \ - __typeof (*mem) oldval; \ - __typeof (mem) memp = (mem); \ + __typeof (value) __addval = (value); \ + __typeof (mem) __memp = (mem); \ + __typeof (*mem) __oldval = *__memp; \ + __typeof (*mem) __tmpval; \ do \ - oldval = *memp; \ - while (__arch_compare_and_exchange_val_64_acq \ - (memp, oldval + addval, oldval) == oldval); \ + __tmpval = __oldval; \ + while ((__oldval = __arch_compare_and_exchange_val_64_acq \ + (__memp, __oldval + __addval, __oldval)) == __tmpval); \ } \ }) @@ -249,12 +251,13 @@ typedef uintmax_t uatomic_max_t; : "m" (*mem)); \ else \ { \ - __typeof (*mem) oldval; \ - __typeof (mem) memp = (mem); \ + __typeof (mem) __memp = (mem); \ + __typeof (*mem) __oldval = *__memp; \ + __typeof (*mem) __tmpval; \ do \ - oldval = *memp; \ - while (__arch_compare_and_exchange_val_64_acq \ - (memp, oldval + 1, oldval) == oldval); \ + __tmpval = __oldval; \ + while ((__oldval = __arch_compare_and_exchange_val_64_acq \ + (__memp, __oldval + 1, __oldval)) == __tmpval); \ } \ }) @@ -293,12 +296,13 @@ typedef uintmax_t uatomic_max_t; : "m" (*mem)); \ else \ { \ - __typeof (*mem) oldval; \ - __typeof (mem) memp = (mem); \ + __typeof (mem) __memp = (mem); \ + __typeof (*mem) __oldval = *__memp; \ + __typeof (*mem) __tmpval; \ do \ - oldval = *memp; \ - while (__arch_compare_and_exchange_val_64_acq \ - (memp, oldval - 1, oldval) == oldval); \ + __tmpval = __oldval; \ + while ((__oldval = __arch_compare_and_exchange_val_64_acq \ + (__memp, __oldval - 1, __oldval)) == __tmpval); \ } \ }) |