abi_x64_common.h File Reference

Common register definitions for the x86-64 architecture. More...

#include <stdint.h>

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Enumerations
enum	x64_gpr {   RAX_REG = 0 , RCX_REG = 1 , RDX_REG = 2 , RBX_REG = 3 ,   RSP_REG = 4 , RBP_REG = 5 , RSI_REG = 6 , RDI_REG = 7 ,   R8_REG = 8 , R9_REG , R10_REG , R11_REG ,   R12_REG , R13_REG , R14_REG , R15_REG }
enum	x64_xmm {   XMM0_REG , XMM1_REG , XMM2_REG , XMM3_REG ,   XMM4_REG , XMM5_REG , XMM6_REG , XMM7_REG ,   XMM8_REG , XMM9_REG , XMM10_REG , XMM11_REG ,   XMM12_REG , XMM13_REG , XMM14_REG , XMM15_REG }

Detailed Description

Common register definitions for the x86-64 architecture.

Copyright (c) 2025 Sanko Robinson

This source code is dual-licensed under the Artistic License 2.0 or the MIT License. You may choose to use this code under the terms of either license.

SPDX-License-Identifier: (Artistic-2.0 OR MIT)

The documentation blocks within this file are licensed under the Creative Commons Attribution 4.0 International License (CC BY 4.0).

SPDX-License-Identifier: CC-BY-4.0

Enumeration Type Documentation

x64_gpr

enum x64_gpr

Enumerator
RAX_REG	Volatile (caller-saved). Primary integer/pointer return value in both ABIs.
RCX_REG	Volatile. 1st integer argument on Windows x64; 4th on System V.
RDX_REG	Volatile. 2nd integer argument on Windows x64; 3rd on System V.
RBX_REG	Callee-saved. Must be preserved across function calls.
RSP_REG	Stack Pointer. Preserved relative to the frame pointer.
RBP_REG	Frame Pointer (Base Pointer). Callee-saved.
RSI_REG	Volatile on System V (2nd integer arg). Callee-saved on Windows.
RDI_REG	Volatile on System V (1st integer arg). Callee-saved on Windows.
R8_REG	Volatile. 3rd integer argument on Windows x64; 5th on System V.
R9_REG	Volatile. 4th integer argument on Windows x64; 6th on System V.
R10_REG	Volatile (caller-saved) scratch register.
R11_REG	Volatile (caller-saved) scratch register.
R12_REG	Callee-saved.
R13_REG	Callee-saved.
R14_REG	Callee-saved.
R15_REG	Callee-saved.

x64_xmm

enum x64_xmm

Enumerator
XMM0_REG	Volatile. 1st float/double argument. Also used for float/double return values.
XMM1_REG	Volatile. 2nd float/double argument.
XMM2_REG	Volatile. 3rd float/double argument.
XMM3_REG	Volatile. 4th float/double argument.
XMM4_REG	Volatile. Used for 5th (System V) float/double argument.
XMM5_REG	Volatile. Used for 6th (System V) float/double argument.
XMM6_REG	Volatile on System V. Callee-saved on Windows x64.
XMM7_REG	Volatile on System V. Callee-saved on Windows x64.
XMM8_REG	Volatile in both ABIs.
XMM9_REG	Volatile in both ABIs.
XMM10_REG	Volatile in both ABIs.
XMM11_REG	Volatile in both ABIs.
XMM12_REG	Volatile in both ABIs.
XMM13_REG	Volatile in both ABIs.
XMM14_REG	Volatile in both ABIs.
XMM15_REG	Volatile in both ABIs.