From c68d0fa2d88fc2134a38d99e7e944828384a7671 Mon Sep 17 00:00:00 2001 From: Austin Foxley Date: Sat, 17 Oct 2009 12:26:24 -0700 Subject: libpthread/nptl: core of the "Native Posix Threading Library" for uClibc targetting arm,sh,i386,mips,sparc for now Signed-off-by: Austin Foxley --- .../nptl/sysdeps/unix/sysv/linux/sh/sem_trywait.S | 89 ++++++++++++++++++++++ 1 file changed, 89 insertions(+) create mode 100644 libpthread/nptl/sysdeps/unix/sysv/linux/sh/sem_trywait.S (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/sh/sem_trywait.S') diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/sh/sem_trywait.S b/libpthread/nptl/sysdeps/unix/sysv/linux/sh/sem_trywait.S new file mode 100644 index 000000000..00c61f3bb --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/sh/sem_trywait.S @@ -0,0 +1,89 @@ +/* Copyright (C) 2003, 2004 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include +#include +#include "lowlevel-atomic.h" + + + .text + + .globl __new_sem_trywait + .type __new_sem_trywait,@function + .align 5 +__new_sem_trywait: + mov.l r12, @-r15 + mov.l r8, @-r15 + sts.l pr, @-r15 + mov r4, r8 + mov.l @r8, r0 +2: + tst r0, r0 + bt 1f + + mov r0, r3 + mov r0, r4 + add #-1, r3 + CMPXCHG (r4, @r8, r3, r2) + bf/s 2b + mov r2, r0 + + lds.l @r15+, pr + mov.l @r15+, r8 + mov.l @r15+, r12 + rts + mov #0, r0 + +1: + mov #EAGAIN, r8 + mova .Lgot1, r0 + mov.l .Lgot1, r12 + add r0, r12 + +#if USE___THREAD + mov.l .Lerrno1, r0 + stc gbr, r1 + mov.l @(r0, r12), r0 + bra .Lexit + add r1, r0 + .align 2 +.Lerrno1: + .long errno@GOTTPOFF +.Lexit: +#else + mov.l .Lerrloc1, r1 + bsrf r1 + nop +.Lerrloc1b: +#endif + mov.l r8, @r0 + lds.l @r15+, pr + mov.l @r15+, r8 + mov.l @r15+, r12 + rts + mov #-1, r0 + + .align 2 +.Lgot1: + .long _GLOBAL_OFFSET_TABLE_ +#if !USE___THREAD +.Lerrloc1: + .long __errno_location@PLT-(.Lerrloc1b-.) +#endif + .size __new_sem_trywait,.-__new_sem_trywait + weak_alias(__new_sem_trywait, sem_trywait) -- cgit v1.2.3