derek.holloway
7502bf64a4
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87 lines
2.8 KiB
C
87 lines
2.8 KiB
C
/* Common target dependent code for GNU/Linux on PPC systems.
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Copyright (C) 2018-2024 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "arch/ppc-linux-common.h"
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#include "arch/ppc-linux-tdesc.h"
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/* Decimal Floating Point bit in AT_HWCAP.
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This file can be used by a host with another architecture, e.g.
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when debugging core files, which might not provide this constant. */
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#ifndef PPC_FEATURE_HAS_DFP
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#define PPC_FEATURE_HAS_DFP 0x00000400
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#endif
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bool
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ppc_linux_has_isa205 (CORE_ADDR hwcap)
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{
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/* Power ISA 2.05 (implemented by Power 6 and newer processors)
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increases the FPSCR from 32 bits to 64 bits. Even though Power 7
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supports this ISA version, it doesn't have PPC_FEATURE_ARCH_2_05
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set, only PPC_FEATURE_ARCH_2_06. Since for now the only bits
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used in the higher half of the register are for Decimal Floating
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Point, we check if that feature is available to decide the size
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of the FPSCR. */
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return ((hwcap & PPC_FEATURE_HAS_DFP) != 0);
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}
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const struct target_desc *
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ppc_linux_match_description (struct ppc_linux_features features)
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{
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const struct target_desc *tdesc = NULL;
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if (features.wordsize == 8)
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{
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if (features.vsx)
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tdesc = (features.htm? tdesc_powerpc_isa207_htm_vsx64l
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: features.isa207? tdesc_powerpc_isa207_vsx64l
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: features.ppr_dscr? tdesc_powerpc_isa205_ppr_dscr_vsx64l
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: features.isa205? tdesc_powerpc_isa205_vsx64l
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: tdesc_powerpc_vsx64l);
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else if (features.altivec)
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tdesc = (features.isa205? tdesc_powerpc_isa205_altivec64l
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: tdesc_powerpc_altivec64l);
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else
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tdesc = (features.isa205? tdesc_powerpc_isa205_64l
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: tdesc_powerpc_64l);
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}
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else
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{
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gdb_assert (features.wordsize == 4);
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if (features.vsx)
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tdesc = (features.htm? tdesc_powerpc_isa207_htm_vsx32l
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: features.isa207? tdesc_powerpc_isa207_vsx32l
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: features.ppr_dscr? tdesc_powerpc_isa205_ppr_dscr_vsx32l
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: features.isa205? tdesc_powerpc_isa205_vsx32l
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: tdesc_powerpc_vsx32l);
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else if (features.altivec)
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tdesc = (features.isa205? tdesc_powerpc_isa205_altivec32l
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: tdesc_powerpc_altivec32l);
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else
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tdesc = (features.isa205? tdesc_powerpc_isa205_32l
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: tdesc_powerpc_32l);
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}
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gdb_assert (tdesc != NULL);
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return tdesc;
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}
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