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PowerPC: Optimized finite/finitef for POWER8
This patch add a optimized finite/finitef implementation for POWER8 using the new Move From VSR Doubleword instruction to gains some cycles from FP to GRP register move.
This commit is contained in:
Adhemerval Zanella
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4393fc119c
commit
cac626d60a
14
ChangeLog
14
ChangeLog
@ -1,3 +1,17 @@
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2014-02-27 Adhemerval Zanella <azanella@linux.vnet.ibm.com>
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* sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile: Add finite power8
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implementation.
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* sysdeps/powerpc/powerpc64/fpu/multiarch/s_finite-power8.S: New file:
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POWER8 finite ifunc implementation.
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* sysdeps/powerpc/powerpc64/fpu/multiarch/s_finite.c (__finite): Add
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POWER8 implementation.
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* sysdeps/powerpc/powerpc64/fpu/multiarch/s_finitef.c (__finitef):
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Likewise.
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* sysdeps/powerpc/powerpc64/power8/fpu/s_finite.S: New file:
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POWER8 finite implementation.
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* sysdeps/powerpc/powerpc64/power8/fpu/s_finitef.S: New file.
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2014-02-27 Adhemerval Zanella <azanella@linux.vnet.ibm.com>
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* sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile: Add isinf power8
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@ -5,7 +5,7 @@ sysdep_routines += s_isnan-power7 s_isnan-power6x s_isnan-power6 \
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s_finitef-ppc64 s_isinff-ppc64 s_isinf-power7 \
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s_isinf-ppc64 s_modf-power5+ s_modf-ppc64 \
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s_modff-power5+ s_modff-ppc64 s_isnan-power8 \
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s_isinf-power8
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s_isinf-power8 s_finite-power8
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libm-sysdep_routines += s_isnan-power7 s_isnan-power6x s_isnan-power6 \
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s_isnan-power5 s_isnan-ppc64 s_llround-power6x \
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@ -23,7 +23,7 @@ libm-sysdep_routines += s_isnan-power7 s_isnan-power6x s_isnan-power6 \
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s_logbl-ppc64 s_modf-power5+ s_modf-ppc64 \
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s_modff-power5+ s_modff-ppc64 e_hypot-ppc64 \
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e_hypot-power7 e_hypotf-ppc64 e_hypotf-power7 \
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s_isnan-power8 s_isinf-power8
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s_isnan-power8 s_isinf-power8 s_finite-power8
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CFLAGS-s_logbf-power7.c = -mcpu=power7
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CFLAGS-s_logbl-power7.c = -mcpu=power7
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33
sysdeps/powerpc/powerpc64/fpu/multiarch/s_finite-power8.S
Normal file
33
sysdeps/powerpc/powerpc64/fpu/multiarch/s_finite-power8.S
Normal file
@ -0,0 +1,33 @@
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/* isnan(). PowerPC64/POWER7 version.
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Copyright (C) 2014 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 <sysdep.h>
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#include <math_ldbl_opt.h>
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#undef hidden_def
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#define hidden_def(name)
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#undef weak_alias
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#define weak_alias(name, alias)
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#undef strong_alias
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#define strong_alias(name, alias)
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#undef compat_symbol
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#define compat_symbol(lib, name, symbol, ver)
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#define __finite __finite_power8
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#include <sysdeps/powerpc/powerpc64/power8/fpu/s_finite.S>
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@ -23,10 +23,13 @@
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extern __typeof (__finite) __finite_ppc64 attribute_hidden;
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extern __typeof (__finite) __finite_power7 attribute_hidden;
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extern __typeof (__finite) __finite_power8 attribute_hidden;
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libc_ifunc (__finite,
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(hwcap & PPC_FEATURE_ARCH_2_06)
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? __finite_power7
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(hwcap2 & PPC_FEATURE2_ARCH_2_07)
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? __finite_power8 :
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(hwcap & PPC_FEATURE_ARCH_2_06)
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? __finite_power7
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: __finite_ppc64);
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weak_alias (__finite, finite)
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@ -23,10 +23,13 @@
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extern __typeof (__finitef) __finitef_ppc64 attribute_hidden;
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/* The double-precision version also works for single-precision. */
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extern __typeof (__finitef) __finite_power7 attribute_hidden;
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extern __typeof (__finitef) __finite_power8 attribute_hidden;
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libc_ifunc (__finitef,
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(hwcap & PPC_FEATURE_ARCH_2_06)
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? __finite_power7
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(hwcap2 & PPC_FEATURE2_ARCH_2_07)
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? __finite_power8 :
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(hwcap & PPC_FEATURE_ARCH_2_06)
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? __finite_power7
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: __finitef_ppc64);
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weak_alias (__finitef, finitef)
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56
sysdeps/powerpc/powerpc64/power8/fpu/s_finite.S
Normal file
56
sysdeps/powerpc/powerpc64/power8/fpu/s_finite.S
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@ -0,0 +1,56 @@
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/* isfinite(). PowerPC64/POWER8 version.
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Copyright (C) 2014 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 <sysdep.h>
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#include <math_ldbl_opt.h>
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#define MFVSRD_R3_V1 .byte 0x7c,0x23,0x00,0x66 /* mfvsrd r3,vs1 */
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/* int [r3] __finite ([fp1] x) */
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EALIGN (__finite, 4, 0)
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CALL_MCOUNT 0
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MFVSRD_R3_V1
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lis r9,0x8010
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clrldi r3,r3,1 /* r3 = r3 & 0x8000000000000000 */
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rldicr r9,r9,32,31 /* r9 = (r9 << 32) & 0xffffffff */
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add r3,r3,r9
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rldicl r3,r3,1,63
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blr
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END (__finite)
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hidden_def (__finite)
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weak_alias (__finite, finite)
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/* It turns out that the 'double' version will also always work for
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single-precision. */
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strong_alias (__finite, __finitef)
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hidden_def (__finitef)
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weak_alias (__finitef, finitef)
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#ifdef IS_IN_libm
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# if LONG_DOUBLE_COMPAT (libm, GLIBC_2_0)
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compat_symbol (libm, __finite, __finitel, GLIBC_2_0)
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compat_symbol (libm, finite, finitel, GLIBC_2_0)
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# endif
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#else
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# if LONG_DOUBLE_COMPAT (libc, GLIBC_2_0)
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compat_symbol (libc, __finite, __finitel, GLIBC_2_0);
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compat_symbol (libc, finite, finitel, GLIBC_2_0);
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# endif
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#endif
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1
sysdeps/powerpc/powerpc64/power8/fpu/s_finitef.S
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1
sysdeps/powerpc/powerpc64/power8/fpu/s_finitef.S
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@ -0,0 +1 @@
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/* This function uses the same code as s_finite.S. */
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