/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Generate .byte code for some instructions not supported by old
 * binutils.
 */
#ifndef X86_ASM_INST_H
#define X86_ASM_INST_H

#ifdef __ASSEMBLER__

#define REG_NUM_INVALID         100

#define REG_TYPE_R32            0
#define REG_TYPE_R64            1
#define REG_TYPE_INVALID        100

        .macro R32_NUM opd r32
        \opd = REG_NUM_INVALID
        .ifc \r32,%eax
        \opd = 0
        .endif
        .ifc \r32,%ecx
        \opd = 1
        .endif
        .ifc \r32,%edx
        \opd = 2
        .endif
        .ifc \r32,%ebx
        \opd = 3
        .endif
        .ifc \r32,%esp
        \opd = 4
        .endif
        .ifc \r32,%ebp
        \opd = 5
        .endif
        .ifc \r32,%esi
        \opd = 6
        .endif
        .ifc \r32,%edi
        \opd = 7
        .endif
#ifdef CONFIG_X86_64
        .ifc \r32,%r8d
        \opd = 8
        .endif
        .ifc \r32,%r9d
        \opd = 9
        .endif
        .ifc \r32,%r10d
        \opd = 10
        .endif
        .ifc \r32,%r11d
        \opd = 11
        .endif
        .ifc \r32,%r12d
        \opd = 12
        .endif
        .ifc \r32,%r13d
        \opd = 13
        .endif
        .ifc \r32,%r14d
        \opd = 14
        .endif
        .ifc \r32,%r15d
        \opd = 15
        .endif
#endif
        .endm

        .macro R64_NUM opd r64
        \opd = REG_NUM_INVALID
#ifdef CONFIG_X86_64
        .ifc \r64,%rax
        \opd = 0
        .endif
        .ifc \r64,%rcx
        \opd = 1
        .endif
        .ifc \r64,%rdx
        \opd = 2
        .endif
        .ifc \r64,%rbx
        \opd = 3
        .endif
        .ifc \r64,%rsp
        \opd = 4
        .endif
        .ifc \r64,%rbp
        \opd = 5
        .endif
        .ifc \r64,%rsi
        \opd = 6
        .endif
        .ifc \r64,%rdi
        \opd = 7
        .endif
        .ifc \r64,%r8
        \opd = 8
        .endif
        .ifc \r64,%r9
        \opd = 9
        .endif
        .ifc \r64,%r10
        \opd = 10
        .endif
        .ifc \r64,%r11
        \opd = 11
        .endif
        .ifc \r64,%r12
        \opd = 12
        .endif
        .ifc \r64,%r13
        \opd = 13
        .endif
        .ifc \r64,%r14
        \opd = 14
        .endif
        .ifc \r64,%r15
        \opd = 15
        .endif
#endif
        .endm

        .macro REG_TYPE type reg
        R32_NUM reg_type_r32 \reg
        R64_NUM reg_type_r64 \reg
        .if reg_type_r64 <> REG_NUM_INVALID
        \type = REG_TYPE_R64
        .elseif reg_type_r32 <> REG_NUM_INVALID
        \type = REG_TYPE_R32
        .else
        \type = REG_TYPE_INVALID
        .endif
        .endm

        .macro PFX_REX opd1 opd2 W=0
        .if ((\opd1 | \opd2) & 8) || \W
        .byte 0x40 | ((\opd1 & 8) >> 3) | ((\opd2 & 8) >> 1) | (\W << 3)
        .endif
        .endm

        .macro MODRM mod opd1 opd2
        .byte \mod | (\opd1 & 7) | ((\opd2 & 7) << 3)
        .endm
#endif

#endif