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598128f5d1
* POWER8/9 feature checks were enabled even if the toolchain didn't support AT_HWCAP2 * Add detection if we need to include <linux/auxvec.h>
50 lines
1.1 KiB
C
50 lines
1.1 KiB
C
/* power_features.c - POWER feature check
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* Copyright (C) 2020 Matheus Castanho <msc@linux.ibm.com>, IBM
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* Copyright (C) 2021-2024 Mika T. Lindqvist <postmaster@raasu.org>
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* For conditions of distribution and use, see copyright notice in zlib.h
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*/
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#ifdef HAVE_SYS_AUXV_H
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# include <sys/auxv.h>
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#endif
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#ifdef POWER_NEED_AUXVEC_H
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# include <linux/auxvec.h>
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#endif
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#ifdef __FreeBSD__
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# include <machine/cpu.h>
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#endif
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#include "zbuild.h"
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#include "power_features.h"
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void Z_INTERNAL power_check_features(struct power_cpu_features *features) {
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#ifdef PPC_FEATURES
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unsigned long hwcap;
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#ifdef __FreeBSD__
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elf_aux_info(AT_HWCAP, &hwcap, sizeof(hwcap));
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#else
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hwcap = getauxval(AT_HWCAP);
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#endif
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if (hwcap & PPC_FEATURE_HAS_ALTIVEC)
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features->has_altivec = 1;
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#endif
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#ifdef POWER_FEATURES
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unsigned long hwcap2;
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#ifdef __FreeBSD__
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elf_aux_info(AT_HWCAP2, &hwcap2, sizeof(hwcap2));
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#else
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hwcap2 = getauxval(AT_HWCAP2);
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#endif
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#ifdef POWER8_VSX
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if (hwcap2 & PPC_FEATURE2_ARCH_2_07)
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features->has_arch_2_07 = 1;
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#endif
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#ifdef POWER9
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if (hwcap2 & PPC_FEATURE2_ARCH_3_00)
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features->has_arch_3_00 = 1;
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#endif
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#endif
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}
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