PowerPC: Optimized isnan/isnanf for POWER8
This patch add a optimized isnan/isnanf 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
parent
7d92b78723
commit
487972aea5
16
ChangeLog
16
ChangeLog
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@ -1,3 +1,19 @@
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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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Add hwcap2 initialization.
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* sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile: Add isnan power8
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implementation.
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* sysdeps/powerpc/powerpc64/fpu/multiarch/s_isnan-power8.S: New file:
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POWER8 isnan ifunc implementation.
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* sysdeps/powerpc/powerpc64/fpu/multiarch/s_isnan.c (__isnan): Add
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POWER8 implementation.
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* sysdeps/powerpc/powerpc64/fpu/multiarch/s_isnanf.c (__isnanf):
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Likewise.
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* sysdeps/powerpc/powerpc64/power8/fpu/s_isnan.S: New file:
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POWER8 isnan implementation.
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* sysdeps/powerpc/powerpc64/power8/fpu/s_isnanf.S: New file.
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2014-02-27 Joey Ye <joey.ye@arm.com>
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* sysdeps/arm/soft-fp/sfp-machine.h (_FP_NANFRAC_S, _FP_NANFRAC_D)
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@ -36,6 +36,7 @@
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and fills the previous ones. */
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#define INIT_ARCH() \
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unsigned long int hwcap = __GLRO(dl_hwcap); \
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unsigned long int __attribute__((unused)) hwcap2 = __GLRO(dl_hwcap2); \
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if (hwcap & PPC_FEATURE_ARCH_2_06) \
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hwcap |= PPC_FEATURE_ARCH_2_05 | \
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PPC_FEATURE_POWER5_PLUS | \
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@ -4,7 +4,7 @@ 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
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s_modff-power5+ s_modff-ppc64 s_isnan-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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@ -21,7 +21,8 @@ libm-sysdep_routines += s_isnan-power7 s_isnan-power6x s_isnan-power6 \
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s_logbl-power7 s_logb-ppc64 s_logbf-ppc64 \
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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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e_hypot-power7 e_hypotf-ppc64 e_hypotf-power7 \
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s_isnan-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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/* 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 __isnan __isnan_power8
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#include <sysdeps/powerpc/powerpc64/power8/fpu/s_isnan.S>
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@ -26,16 +26,19 @@ extern __typeof (__isnan) __isnan_power5 attribute_hidden;
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extern __typeof (__isnan) __isnan_power6 attribute_hidden;
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extern __typeof (__isnan) __isnan_power6x attribute_hidden;
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extern __typeof (__isnan) __isnan_power7 attribute_hidden;
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extern __typeof (__isnan) __isnan_power8 attribute_hidden;
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libc_ifunc (__isnan,
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(hwcap & PPC_FEATURE_ARCH_2_06)
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? __isnan_power7 :
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(hwcap & PPC_FEATURE_POWER6_EXT)
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(hwcap2 & PPC_FEATURE2_ARCH_2_07)
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? __isnan_power8 :
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(hwcap & PPC_FEATURE_ARCH_2_06)
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? __isnan_power7 :
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(hwcap & PPC_FEATURE_POWER6_EXT)
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? __isnan_power6x :
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(hwcap & PPC_FEATURE_ARCH_2_05)
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? __isnan_power6 :
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(hwcap & PPC_FEATURE_POWER5)
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? __isnan_power5
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(hwcap & PPC_FEATURE_ARCH_2_05)
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? __isnan_power6 :
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(hwcap & PPC_FEATURE_POWER5)
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? __isnan_power5
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: __isnan_ppc64);
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weak_alias (__isnan, isnan)
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@ -25,16 +25,19 @@ extern __typeof (__isnanf) __isnan_power5 attribute_hidden;
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extern __typeof (__isnanf) __isnan_power6 attribute_hidden;
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extern __typeof (__isnanf) __isnan_power6x attribute_hidden;
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extern __typeof (__isnanf) __isnan_power7 attribute_hidden;
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extern __typeof (__isnanf) __isnan_power8 attribute_hidden;
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libc_ifunc (__isnanf,
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(hwcap & PPC_FEATURE_ARCH_2_06)
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? __isnan_power7 :
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(hwcap & PPC_FEATURE_POWER6_EXT)
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? __isnan_power6x :
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(hwcap & PPC_FEATURE_ARCH_2_05)
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? __isnan_power6 :
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(hwcap & PPC_FEATURE_POWER5)
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? __isnan_power5
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(hwcap2 & PPC_FEATURE2_ARCH_2_07)
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? __isnan_power8 :
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(hwcap & PPC_FEATURE_ARCH_2_06)
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? __isnan_power7 :
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(hwcap & PPC_FEATURE_POWER6_EXT)
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? __isnan_power6x :
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(hwcap & PPC_FEATURE_ARCH_2_05)
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? __isnan_power6 :
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(hwcap & PPC_FEATURE_POWER5)
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? __isnan_power5
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: __isnan_ppc64);
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weak_alias (__isnanf, isnanf)
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@ -0,0 +1,53 @@
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/* isnan(). 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] __isnan([f1] x) */
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EALIGN (__isnan, 4, 0)
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CALL_MCOUNT 0
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MFVSRD_R3_V1
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lis r9,0x7ff0
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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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subf r3,r3,r9
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rldicl r3,r3,1,63
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blr
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END (__isnan)
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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 (__isnan, __isnanf)
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hidden_def (__isnanf)
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weak_alias (__isnanf, isnanf)
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#ifdef NO_LONG_DOUBLE
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strong_alias (__isnan, __isnanl)
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weak_alias (__isnan, isnanl)
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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, __isnan, __isnanl, GLIBC_2_0);
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compat_symbol (libc, isnan, isnanl, 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_isnan.S. */
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