From 4b88139b6f22b70048793725a6c3f67bddc7baee Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Fri, 20 Jun 2014 17:13:47 -0700 Subject: Move remaining SPARC code out of nptl/. --- sysdeps/sparc/sparc64/nptl/cpu_relax.S | 67 ++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 sysdeps/sparc/sparc64/nptl/cpu_relax.S (limited to 'sysdeps/sparc/sparc64') diff --git a/sysdeps/sparc/sparc64/nptl/cpu_relax.S b/sysdeps/sparc/sparc64/nptl/cpu_relax.S new file mode 100644 index 0000000000..9d45eb7e42 --- /dev/null +++ b/sysdeps/sparc/sparc64/nptl/cpu_relax.S @@ -0,0 +1,67 @@ +/* CPU strand yielding for busy loops. + Copyright (C) 2012-2014 Free Software Foundation, Inc. + Contributed by David S. Miller (davem@davemloft.net) + 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, see + . */ + +#include + + .text +__cpu_relax_generic: + rd %ccr, %g0 + rd %ccr, %g0 + rd %ccr, %g0 + retl + nop + .size __cpu_relax_generic,.-__cpu_relax_generic + +__cpu_relax_pause: + wr %g0, 128, %asr27 + retl + nop + .size __cpu_relax_pause,.-__cpu_relax_pause + +ENTRY(__cpu_relax) + .type __cpu_relax, @gnu_indirect_function +# ifdef SHARED + SETUP_PIC_REG_LEAF(o3, o5) +# endif + set HWCAP_SPARC_PAUSE, %o1 + andcc %o0, %o1, %g0 + be 1f + nop +# ifdef SHARED + sethi %gdop_hix22(__cpu_relax_pause), %o1 + xor %o1, %gdop_lox10(__cpu_relax_pause), %o1 +# else + set __cpu_relax_pause, %o1 +# endif + ba 10f + nop +1: +# ifdef SHARED + sethi %gdop_hix22(__cpu_relax_generic), %o1 + xor %o1, %gdop_lox10(__cpu_relax_generic), %o1 +# else + set __cpu_relax_generic, %o1 +# endif +10: +# ifdef SHARED + add %o3, %o1, %o1 +# endif + retl + mov %o1, %o0 +END(__cpu_relax) -- cgit 1.4.1