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sparc: refactor cpu_relax to C
* sysdeps/sparc/sparc64/cpu_relax.c: New file. * sysdeps/sparc/sparc32/sparcv9/cpu_relax.c: Likewise. * sysdeps/sparc/sparc64/cpu_relax.S: Remove file. * sysdeps/sparc/sparc32/sparcv9/cpu_relax.S: Likewise. Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
This commit is contained in:
Adhemerval Zanella
@@ -1,5 +1,10 @@
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2017-12-01 Adhemerval Zanella <adhemerval.zanella@linaro.org>
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2017-12-01 Adhemerval Zanella <adhemerval.zanella@linaro.org>
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* sysdeps/sparc/sparc64/cpu_relax.c: New file.
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* sysdeps/sparc/sparc32/sparcv9/cpu_relax.c: Likewise.
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* sysdeps/sparc/sparc64/cpu_relax.S: Remove file.
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* sysdeps/sparc/sparc32/sparcv9/cpu_relax.S: Likewise.
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* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile
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* sysdeps/sparc/sparc32/sparcv9/fpu/multiarch/Makefile
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(libm-sysdep_routines): Add s_nearbyintf-generic and
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(libm-sysdep_routines): Add s_nearbyintf-generic and
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s_nearbyint-generic.
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s_nearbyint-generic.
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@@ -1 +0,0 @@
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#include <sysdeps/sparc/sparc64/cpu_relax.S>
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1
sysdeps/sparc/sparc32/sparcv9/cpu_relax.c
Normal file
1
sysdeps/sparc/sparc32/sparcv9/cpu_relax.c
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@@ -0,0 +1 @@
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#include <sysdeps/sparc/sparc64/cpu_relax.c>
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@@ -1,67 +0,0 @@
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/* CPU strand yielding for busy loops.
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Copyright (C) 2012-2017 Free Software Foundation, Inc.
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Contributed by David S. Miller (davem@davemloft.net)
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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.text
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__cpu_relax_generic:
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rd %ccr, %g0
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rd %ccr, %g0
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rd %ccr, %g0
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retl
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nop
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.size __cpu_relax_generic,.-__cpu_relax_generic
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__cpu_relax_pause:
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wr %g0, 128, %asr27
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retl
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nop
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.size __cpu_relax_pause,.-__cpu_relax_pause
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ENTRY(__cpu_relax)
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.type __cpu_relax, @gnu_indirect_function
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# ifdef SHARED
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SETUP_PIC_REG_LEAF(o3, o5)
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# endif
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set HWCAP_SPARC_PAUSE, %o1
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andcc %o0, %o1, %g0
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be 1f
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nop
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# ifdef SHARED
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sethi %gdop_hix22(__cpu_relax_pause), %o1
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xor %o1, %gdop_lox10(__cpu_relax_pause), %o1
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# else
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set __cpu_relax_pause, %o1
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# endif
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ba 10f
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nop
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1:
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# ifdef SHARED
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sethi %gdop_hix22(__cpu_relax_generic), %o1
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xor %o1, %gdop_lox10(__cpu_relax_generic), %o1
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# else
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set __cpu_relax_generic, %o1
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# endif
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10:
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# ifdef SHARED
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add %o3, %o1, %o1
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# endif
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retl
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mov %o1, %o0
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END(__cpu_relax)
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38
sysdeps/sparc/sparc64/cpu_relax.c
Normal file
38
sysdeps/sparc/sparc64/cpu_relax.c
Normal file
@@ -0,0 +1,38 @@
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/* CPU strand yielding for busy loops. Linux/sparc64 version.
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Copyright (C) 2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sparc-ifunc.h>
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static void
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__cpu_relax_generic (void)
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{
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asm volatile ("rd %ccr, %g0;"
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"rd %ccr, %g0;"
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"rd %ccr, %g0");
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}
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static void
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__cpu_relax_pause (void)
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{
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asm volatile ("wr %g0, 128, %asr27");
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}
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sparc_libc_ifunc (__cpu_relax,
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hwcap & HWCAP_SPARC_PAUSE
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? __cpu_relax_pause
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: __cpu_relax_generic)
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