PowerPC: Optimized isinf/isinff for POWER8
This patch add a optimized isinf/isinff 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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487972aea5
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4393fc119c
14
ChangeLog
14
ChangeLog
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@ -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 isinf power8
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implementation.
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* sysdeps/powerpc/powerpc64/fpu/multiarch/s_isinf-power8.S: New file:
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POWER8 isinf ifunc implementation.
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* sysdeps/powerpc/powerpc64/fpu/multiarch/s_isinf.c (__isinf): Add
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POWER8 implementation.
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* sysdeps/powerpc/powerpc64/fpu/multiarch/s_isinff.c (__isinff):
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Likewise.
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* sysdeps/powerpc/powerpc64/power8/fpu/s_isinf.S: New file:
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POWER8 isinf implementation.
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* sysdeps/powerpc/powerpc64/power8/fpu/s_isinff.S: New file.
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2014-02-27 Adhemerval Zanella <azanella@linux.vnet.ibm.com>
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* sysdeps/powerpc/powerpc32/power4/multiarch/init-arch.h (INIT_ARCH):
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@ -4,7 +4,8 @@ sysdep_routines += s_isnan-power7 s_isnan-power6x s_isnan-power6 \
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s_copysign-ppc64 s_finite-power7 s_finite-ppc64 \
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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_modff-power5+ s_modff-ppc64 s_isnan-power8 \
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s_isinf-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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@ -22,7 +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
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s_isnan-power8 s_isinf-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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@ -0,0 +1,33 @@
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/* isinf(). 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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#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, alias, ver)
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#define __isinf __isinf_power8
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#include <sysdeps/powerpc/powerpc64/power8/fpu/s_isinf.S>
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@ -23,10 +23,13 @@
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extern __typeof (__isinf) __isinf_ppc64 attribute_hidden;
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extern __typeof (__isinf) __isinf_power7 attribute_hidden;
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extern __typeof (__isinf) __isinf_power8 attribute_hidden;
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libc_ifunc (__isinf,
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(hwcap & PPC_FEATURE_ARCH_2_06)
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? __isinf_power7
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(hwcap2 & PPC_FEATURE2_ARCH_2_07)
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? __isinf_power8 :
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(hwcap & PPC_FEATURE_ARCH_2_06)
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? __isinf_power7
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: __isinf_ppc64);
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weak_alias (__isinf, isinf)
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@ -24,10 +24,13 @@
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extern __typeof (__isinff) __isinff_ppc64 attribute_hidden;
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/* The double-precision version also works for single-precision. */
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extern __typeof (__isinff) __isinf_power7 attribute_hidden;
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extern __typeof (__isinff) __isinf_power8 attribute_hidden;
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libc_ifunc (__isinff,
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(hwcap & PPC_FEATURE_ARCH_2_06)
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? __isinf_power7
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(hwcap2 & PPC_FEATURE2_ARCH_2_07)
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? __isinf_power8 :
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(hwcap & PPC_FEATURE_ARCH_2_06)
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? __isinf_power7
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: __isinff_ppc64);
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weak_alias (__isinff, isinff)
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@ -0,0 +1,61 @@
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/* isinf(). 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] __isinf([fp1] x) */
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EALIGN (__isinf, 4, 0)
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CALL_MCOUNT 0
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MFVSRD_R3_V1
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lis r9,0x7ff0 /* r9 = 0x7ff0 */
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rldicl r10,r3,0,1 /* r10 = r3 & (0x8000000000000000) */
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sldi r9,r9,32 /* r9 = r9 << 52 */
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cmpd cr7,r10,r9 /* fp1 & 0x7ff0000000000000 ? */
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beq cr7,L(inf)
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li r3,0 /* Not inf */
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blr
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L(inf):
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sradi r3,r3,63 /* r3 = r3 >> 63 */
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ori r3,r3,1 /* r3 = r3 | 0x1 */
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blr
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END (__isinf)
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hidden_def (__isinf)
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weak_alias (__isinf, isinf)
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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 (__isinf, __isinff)
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hidden_def (__isinff)
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weak_alias (__isinff, isinff)
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#ifdef NO_LONG_DOUBLE
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strong_alias (__isinf, __isinfl)
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weak_alias (__isinf, isinfl)
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#endif
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#ifndef IS_IN_libm
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# if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0)
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compat_symbol (libc, __isinf, __isinfl, GLIBC_2_0);
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compat_symbol (libc, isinf, isinfl, GLIBC_2_0);
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# endif
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#endif
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@ -0,0 +1 @@
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/* This function uses the same code as s_isinf.S. */
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