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| author | Ulrich Drepper <drepper@redhat.com> | 2009-07-20 08:39:47 -0700 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2009-07-20 08:39:47 -0700 |
| commit | c3db953c165baa444d01ee6c04ef0c51eba42522 (patch) | |
| tree | 6944ca213a06f764019a4b1f7142b486d584b67f | |
| parent | 42e69bcf1137fccfd7a95645a9d316c6490b9ff9 (diff) | |
| download | glibc-c3db953c165baa444d01ee6c04ef0c51eba42522.zip glibc-c3db953c165baa444d01ee6c04ef0c51eba42522.tar.gz glibc-c3db953c165baa444d01ee6c04ef0c51eba42522.tar.bz2 | |
Minor optimizations of last x86-64 condvar changes.
| -rw-r--r-- | nptl/ChangeLog | 6 | ||||
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S | 8 | ||||
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S | 31 |
3 files changed, 22 insertions, 23 deletions
diff --git a/nptl/ChangeLog b/nptl/ChangeLog index c747be4..2f0b8d8 100644 --- a/nptl/ChangeLog +++ b/nptl/ChangeLog @@ -1,3 +1,9 @@ +2009-07-20 Ulrich Drepper <drepper@redhat.com> + + * sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S: Minor + optimizations of last changes. + * sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S: Likewise. + 2009-07-19 Ulrich Drepper <drepper@redhat.com> * sysdeps/unix/sysv/linux/x86_64/lowlevellock.h: Define diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S index f81466e..e12790c 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S @@ -160,16 +160,14 @@ __pthread_cond_timedwait: movq 8(%rsp), %rdi movq %r13, %r10 + movl $FUTEX_WAIT_BITSET, %esi cmpq $-1, dep_mutex(%rdi) - movl $FUTEX_WAIT_BITSET, %eax - movl $(FUTEX_WAIT_BITSET|FUTEX_PRIVATE_FLAG), %esi - cmove %eax, %esi je 60f movq dep_mutex(%rdi), %r8 /* Requeue to a PI mutex if the PI bit is set. */ testl $PI_BIT, MUTEX_KIND(%r8) - je 60f + je 61f movl $(FUTEX_WAIT_REQUEUE_PI|FUTEX_PRIVATE_FLAG), %esi xorl %eax, %eax @@ -191,10 +189,10 @@ __pthread_cond_timedwait: cmpq $-4095, %rax jnae 62f - movl $(FUTEX_WAIT_BITSET|FUTEX_PRIVATE_FLAG), %esi subq $cond_futex, %rdi #endif +61: movl $(FUTEX_WAIT_BITSET|FUTEX_PRIVATE_FLAG), %esi 60: xorl %r15d, %r15d xorl %eax, %eax /* The following only works like this because we only support diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S index e6323ea..2fab38e 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S @@ -128,28 +128,15 @@ __pthread_cond_wait: movq 8(%rsp), %rdi xorq %r10, %r10 movq %r12, %rdx - // XXX reverse + lea - addq $cond_futex, %rdi - cmpq $-1, dep_mutex-cond_futex(%rdi) -#ifdef __ASSUME_PRIVATE_FUTEX - movl $FUTEX_WAIT, %eax - movl $(FUTEX_WAIT|FUTEX_PRIVATE_FLAG), %esi - cmove %eax, %esi -#else - movl $0, %eax - movl %fs:PRIVATE_FUTEX, %esi - cmove %eax, %esi -# if FUTEX_WAIT != 0 -# error "cc destroyed by following orl" - orl $FUTEX_WAIT, %esi -# endif -#endif + cmpq $-1, dep_mutex(%rdi) + leaq cond_futex(%rdi), %rdi + movl $FUTEX_WAIT, %esi je 60f movq dep_mutex-cond_futex(%rdi), %r8 /* Requeue to a PI mutex if the PI bit is set. */ testl $PI_BIT, MUTEX_KIND(%r8) - je 60f + je 61f movl $(FUTEX_WAIT_REQUEUE_PI|FUTEX_PRIVATE_FLAG), %esi movl $SYS_futex, %eax @@ -162,9 +149,17 @@ __pthread_cond_wait: cmpq $-4095, %rax jnae 62f - movl $(FUTEX_WAIT|FUTEX_PRIVATE_FLAG), %esi +# ifndef __ASSUME_PRIVATE_FUTEX + movl $FUTEX_WAIT, %esi +# endif #endif +61: +#ifdef __ASSUME_PRIVATE_FUTEX + movl $(FUTEX_WAIT|FUTEX_PRIVATE_FLAG), %esi +#else + orl %fs:PRIVATE_FUTEX, %esi +#endif 60: xorl %r13d, %r13d movl $SYS_futex, %eax syscall |