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/* Assembler macros for x86.
Copyright (C) 2017-2024 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
<https://www.gnu.org/licenses/>. */
#ifndef _X86_SYSDEP_H
#define _X86_SYSDEP_H 1
#include <sysdeps/generic/sysdep.h>
/* The extended state feature IDs in the state component bitmap. */
#define X86_XSTATE_X87_ID 0
#define X86_XSTATE_SSE_ID 1
#define X86_XSTATE_AVX_ID 2
#define X86_XSTATE_BNDREGS_ID 3
#define X86_XSTATE_BNDCFG_ID 4
#define X86_XSTATE_K_ID 5
#define X86_XSTATE_ZMM_H_ID 6
#define X86_XSTATE_ZMM_ID 7
#define X86_XSTATE_PKRU_ID 9
#define X86_XSTATE_TILECFG_ID 17
#define X86_XSTATE_TILEDATA_ID 18
#define X86_XSTATE_APX_F_ID 19
#ifdef __x86_64__
/* Offset for fxsave/xsave area used by _dl_runtime_resolve. Also need
space to preserve RCX, RDX, RSI, RDI, R8, R9 and RAX. It must be
aligned to 16 bytes for fxsave and 64 bytes for xsave.
NB: Is is non-zero because of the 128-byte red-zone. Some registers
are saved on stack without adjusting stack pointer first. When we
update stack pointer to allocate more space, we need to take the
red-zone into account. */
# define STATE_SAVE_OFFSET (8 * 7 + 8)
/* Save SSE, AVX, AVX512, mask, bound and APX registers. Bound and APX
registers are mutually exclusive. */
# define STATE_SAVE_MASK \
((1 << X86_XSTATE_SSE_ID) \
| (1 << X86_XSTATE_AVX_ID) \
| (1 << X86_XSTATE_BNDREGS_ID) \
| (1 << X86_XSTATE_K_ID) \
| (1 << X86_XSTATE_ZMM_H_ID) \
| (1 << X86_XSTATE_ZMM_ID) \
| (1 << X86_XSTATE_APX_F_ID))
/* AMX state mask. */
# define AMX_STATE_SAVE_MASK \
((1 << X86_XSTATE_TILECFG_ID) | (1 << X86_XSTATE_TILEDATA_ID))
/* States to be included in xsave_state_full_size. */
# define FULL_STATE_SAVE_MASK \
(STATE_SAVE_MASK | AMX_STATE_SAVE_MASK)
#else
/* Offset for fxsave/xsave area used by _dl_tlsdesc_dynamic. Since i386
doesn't have red-zone, use 0 here. */
# define STATE_SAVE_OFFSET 0
/* Save SSE, AVX, AXV512, mask and bound registers. */
# define STATE_SAVE_MASK \
((1 << X86_XSTATE_SSE_ID) \
| (1 << X86_XSTATE_AVX_ID) \
| (1 << X86_XSTATE_BNDREGS_ID) \
| (1 << X86_XSTATE_K_ID) \
| (1 << X86_XSTATE_ZMM_H_ID))
/* States to be included in xsave_state_size. */
# define FULL_STATE_SAVE_MASK STATE_SAVE_MASK
#endif
/* States which should be saved for TLSDESC_CALL and TLS_DESC_CALL.
Compiler assumes that all registers, including AMX and x87 FPU
stack registers, are unchanged after CALL, except for EFLAGS and
RAX/EAX. */
#define TLSDESC_CALL_STATE_SAVE_MASK \
(FULL_STATE_SAVE_MASK | (1 << X86_XSTATE_X87_ID))
/* Constants for bits in __x86_string_control: */
/* Avoid short distance REP MOVSB. */
#define X86_STRING_CONTROL_AVOID_SHORT_DISTANCE_REP_MOVSB (1 << 0)
#ifdef __ASSEMBLER__
/* Syntactic details of assembler. */
/* ELF uses byte-counts for .align, most others use log2 of count of bytes. */
#define ALIGNARG(log2) 1<<log2
#define ASM_SIZE_DIRECTIVE(name) .size name,.-name;
/* Common entry 16 byte aligns. */
#define ENTRY(name) ENTRY_P2ALIGN (name, 4)
#undef END
#define END(name) \
cfi_endproc; \
ASM_SIZE_DIRECTIVE(name)
#define ENTRY_CHK(name) ENTRY (name)
#define END_CHK(name) END (name)
/* Since C identifiers are not normally prefixed with an underscore
on this system, the asm identifier `syscall_error' intrudes on the
C name space. Make sure we use an innocuous name. */
#define syscall_error __syscall_error
#define mcount _mcount
#undef PSEUDO_END
#define PSEUDO_END(name) \
END (name)
/* Local label name for asm code. */
#ifndef L
/* ELF-like local names start with `.L'. */
# define LOCAL_LABEL(name) .L##name
# define L(name) LOCAL_LABEL(name)
#endif
#define atom_text_section .section ".text.atom", "ax"
#endif /* __ASSEMBLER__ */
#endif /* _X86_SYSDEP_H */
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