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arch
aarch64-scalable-linux.c
Go to the documentation of this file.
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/* Common Linux arch-specific functionality for AArch64 scalable
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extensions: SVE and SME.
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Copyright (C) 2023 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/aarch64-scalable-linux.h
"
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#include "
arch/aarch64.h
"
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#include "gdbsupport/byte-vector.h"
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#include "gdbsupport/common-regcache.h"
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/* See arch/aarch64-scalable-linux.h */
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bool
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sve_state_is_empty
(
const
struct
reg_buffer_common *reg_buf)
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{
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/* Instead of allocating a buffer with the size of the current vector
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length, just use a buffer that is big enough for all cases. */
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gdb_byte zero_buffer[256];
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/* Zero it out. */
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memset (zero_buffer, 0, 256);
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/* Are any of the Z registers set (non-zero) after the first 128 bits? */
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for
(
int
i = 0; i <
AARCH64_SVE_Z_REGS_NUM
; i++)
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{
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if
(!reg_buf->raw_compare (
AARCH64_SVE_Z0_REGNUM
+ i, zero_buffer,
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V_REGISTER_SIZE
))
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return
false
;
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}
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/* Are any of the P registers set (non-zero)? */
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for
(
int
i = 0; i <
AARCH64_SVE_P_REGS_NUM
; i++)
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{
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if
(!reg_buf->raw_compare (
AARCH64_SVE_P0_REGNUM
+ i, zero_buffer, 0))
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return
false
;
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}
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/* Is the FFR register set (non-zero)? */
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return
reg_buf->raw_compare (
AARCH64_SVE_FFR_REGNUM
, zero_buffer, 0);
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}
sve_state_is_empty
bool sve_state_is_empty(const struct reg_buffer_common *reg_buf)
Definition
aarch64-scalable-linux.c:29
aarch64-scalable-linux.h
aarch64.h
AARCH64_SVE_P_REGS_NUM
#define AARCH64_SVE_P_REGS_NUM
Definition
aarch64.h:171
AARCH64_SVE_FFR_REGNUM
@ AARCH64_SVE_FFR_REGNUM
Definition
aarch64.h:130
AARCH64_SVE_Z0_REGNUM
@ AARCH64_SVE_Z0_REGNUM
Definition
aarch64.h:123
AARCH64_SVE_P0_REGNUM
@ AARCH64_SVE_P0_REGNUM
Definition
aarch64.h:127
V_REGISTER_SIZE
#define V_REGISTER_SIZE
Definition
aarch64.h:141
AARCH64_SVE_Z_REGS_NUM
#define AARCH64_SVE_Z_REGS_NUM
Definition
aarch64.h:170
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