From 4c38c1a229bc3628269ad98bd7e8d31d118d91f6 Mon Sep 17 00:00:00 2001 From: Florian Weimer Date: Fri, 4 Dec 2020 09:13:43 +0100 Subject: powerpc64le: Add glibc-hwcaps support The "power10" and "power9" subdirectories are selected in a way that matches the -mcpu=power10 and -mcpu=power9 options of GCC. --- sysdeps/powerpc/powerpc64/le/Makefile | 28 ++++++++++++ sysdeps/powerpc/powerpc64/le/dl-hwcaps-subdirs.c | 46 ++++++++++++++++++++ sysdeps/powerpc/powerpc64/le/tst-glibc-hwcaps.c | 54 ++++++++++++++++++++++++ 3 files changed, 128 insertions(+) create mode 100644 sysdeps/powerpc/powerpc64/le/dl-hwcaps-subdirs.c create mode 100644 sysdeps/powerpc/powerpc64/le/tst-glibc-hwcaps.c (limited to 'sysdeps/powerpc') diff --git a/sysdeps/powerpc/powerpc64/le/Makefile b/sysdeps/powerpc/powerpc64/le/Makefile index 033dc77..7c036b4 100644 --- a/sysdeps/powerpc/powerpc64/le/Makefile +++ b/sysdeps/powerpc/powerpc64/le/Makefile @@ -188,3 +188,31 @@ ifeq ($(subdir),nptl) CFLAGS-tst-thread_local1.cc += -mno-float128 CFLAGS-tst-minstack-throw.cc += -mno-float128 endif + +ifeq ($(subdir),elf) +$(objpfx)tst-glibc-hwcaps: \ + $(objpfx)libmarkermod2-1.so $(objpfx)libmarkermod3-1.so +$(objpfx)tst-glibc-hwcaps.out: \ + $(objpfx)libmarkermod2.so \ + $(objpfx)glibc-hwcaps/power9/libmarkermod2.so \ + $(objpfx)libmarkermod3.so \ + $(objpfx)glibc-hwcaps/power9/libmarkermod3.so \ + $(objpfx)glibc-hwcaps/power10/libmarkermod3.so \ + +$(objpfx)glibc-hwcaps/power9/libmarkermod2.so: $(objpfx)libmarkermod2-2.so + $(make-target-directory) + cp $< $@ +$(objpfx)glibc-hwcaps/power9/libmarkermod3.so: $(objpfx)libmarkermod3-2.so + $(make-target-directory) + cp $< $@ +$(objpfx)glibc-hwcaps/power10/libmarkermod3.so: $(objpfx)libmarkermod3-3.so + $(make-target-directory) + cp $< $@ + +ifeq (no,$(build-hardcoded-path-in-tests)) +# This is an ld.so.cache test, and RPATH/RUNPATH in the executable +# interferes with its test objectives. +tests-container += tst-glibc-hwcaps-cache +endif + +endif # $(subdir) == elf diff --git a/sysdeps/powerpc/powerpc64/le/dl-hwcaps-subdirs.c b/sysdeps/powerpc/powerpc64/le/dl-hwcaps-subdirs.c new file mode 100644 index 0000000..6a21d77 --- /dev/null +++ b/sysdeps/powerpc/powerpc64/le/dl-hwcaps-subdirs.c @@ -0,0 +1,46 @@ +/* Architecture-specific glibc-hwcaps subdirectories. powerpc64le version. + Copyright (C) 2020 Free Software Foundation, Inc. + 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 +#include + +const char _dl_hwcaps_subdirs[] = "power10:power9"; +enum { subdirs_count = 2 }; /* Number of components in _dl_hwcaps_subdirs. */ + +uint32_t +_dl_hwcaps_subdirs_active (void) +{ + int active = 0; + + /* Test in reverse preference order. Altivec and VSX are implied by + the powerpc64le ABI definition. */ + + /* POWER9. GCC enables float128 hardware support for -mcpu=power9. */ + if ((GLRO (dl_hwcap2) & PPC_FEATURE2_ARCH_3_00) == 0 + || (GLRO (dl_hwcap2) & PPC_FEATURE2_HAS_IEEE128) == 0) + return _dl_hwcaps_subdirs_build_bitmask (subdirs_count, active); + ++active; + + /* POWER10. GCC defines __MMA__ for -mcpu=power10. */ + if ((GLRO (dl_hwcap2) & PPC_FEATURE2_ARCH_3_1) == 0 + || (GLRO (dl_hwcap2) & PPC_FEATURE2_MMA) == 0) + return _dl_hwcaps_subdirs_build_bitmask (subdirs_count, active); + ++active; + + return _dl_hwcaps_subdirs_build_bitmask (subdirs_count, active); +} diff --git a/sysdeps/powerpc/powerpc64/le/tst-glibc-hwcaps.c b/sysdeps/powerpc/powerpc64/le/tst-glibc-hwcaps.c new file mode 100644 index 0000000..e510fca --- /dev/null +++ b/sysdeps/powerpc/powerpc64/le/tst-glibc-hwcaps.c @@ -0,0 +1,54 @@ +/* glibc-hwcaps subdirectory test. powerpc64le version. + Copyright (C) 2020 Free Software Foundation, Inc. + 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 +#include +#include +#include +#include + +extern int marker2 (void); +extern int marker3 (void); + +/* Return the POWER level, 8 for the baseline. */ +static int +compute_level (void) +{ + const char *platform = (const char *) getauxval (AT_PLATFORM); + if (strcmp (platform, "power8") == 0) + return 8; + if (strcmp (platform, "power9") == 0) + return 9; + if (strcmp (platform, "power10") == 0) + return 10; + printf ("warning: unrecognized AT_PLATFORM value: %s\n", platform); + /* Assume that the new platform supports POWER10. */ + return 10; +} + +static int +do_test (void) +{ + int level = compute_level (); + printf ("info: detected POWER level: %d\n", level); + TEST_COMPARE (marker2 (), MIN (level - 7, 2)); + TEST_COMPARE (marker3 (), MIN (level - 7, 3)); + return 0; +} + +#include -- cgit v1.1