CPU 32bit/64bit の違いのメモ

Data Size

OS (64bit)	CPU arch			bool	char	short	int	long	long long	float	double	void*	intptr_t	size_t	off_t	wchar_t	virtual	simd64	simd128	simd256
Windows 7/8	x64/amd64	64	LLP64	1/1	1/1	2/2	4/4	4/4	8/8	4/4	8/8	8/8	8/8	8/8	4/4	2/2	8/8	8/8	16/16	32/32
MacOS X 10.8	x86_64	64	LP64	1/1	1/1	2/2	4/4	8/8	8/8	4/4	8/8	8/8	8/8	8/8	8/8	4/4	8/8	8/8	16/16	32/32
Ubuntu 13.04	x86_64	64	LP64	1/1	1/1	2/2	4/4	8/8	8/8	4/4	8/8	8/8	8/8	8/8	8/8	4/4	8/8	8/8	16/16
iOS 7.0	arm64	64	LP64	1/1	1/1	2/2	4/4	8/8	8/8	4/4	8/8	8/8	8/8	8/8	8/8	4/4	8/8	8/8	16/16	–
Android 5.0	arm64	64	LP64	1/1	1/1	2/2	4/4	8/8	8/8	4/4	8/8	8/8	8/8	8/8	8/8	4/4	8/8	8/8	16/16	–
OS (32bit)	CPU arch			bool	char	short	int	long	long long	float	double	void*	intptr_t	size_t	off_t	wchar_t	virtual	simd64	simd128	simd256
Windows 7/8	x86	32	ILP32	1/1	1/1	2/2	4/4	4/4	8/8	4/4	8/8	4/4	4/4	4/4	4/4	2/2	4/4	8/8	16/16	32/32
MacOS X 10.8	i386	32	ILP32	1/1	1/1	2/2	4/4	4/4	8/8	4/4	8/8	4/4	4/4	4/4	8/8	4/4	4/4	8/8	16/16	32/32
Ubuntu 13.04	i686	32	ILP32	1/1	1/1	2/2	4/4	4/4	8/8	4/4	8/8	4/4	4/4	4/4	4/4	4/4	4/4	8/8	16/16
Ubuntu 13.04	armv7l	32	ILP32	1/1	1/1	2/2	4/4	4/4	8/8	4/4	8/8	4/4	4/4	4/4	4/4	4/4	4/4	8/8	16/16	–
Android 4.4	armeabi-v7a	32	ILP32	1/1	1/1	2/2	4/4	4/4	8/8	4/4	8/8	4/4	4/4	4/4	4/4	4/4	4/4	8/8	16/8	–
iOS 7.1	armv7	32	ILP32	1/1	1/1	2/2	4/4	4/4	8/8	4/4	8/8	4/4	4/4	4/4	8/8	4/4	4/4	8/8	16/16	–

sizeof(type) / alignof(type)
virtual= sizeof( struct { virtual void a(){} } )

ISA

ISA 64bit	cc/os
AMD64/Intel64/EM64T	x64, x86_64
ARMv8-A AArch64	arm64
PowerPC 64bit	ppc64
IA-64		Itanium
ISA 32bit	cc/os
IA-32	x86, i386, i686
ARMv5TE	armv5te
ARMv6	armv6
ARMv7-A	armv7, armv7s, armv7l
MIPS32-R1	mips
PowerPC 32bit

Function Calling convention

Windows x64

MSDN Overview of x64 Calling Conventions

Parameter

int 64bit	float 128bit
rcx (r2)	xmm0
rdx (r3)	xmm1
r8	xmm2
r9	xmm3

Return

int 64bit	float 128bit
rax (r0)	xmm0

非POD や 64bit を超える戻り値は参照渡しに変換される

Saved register

rbx (r1)

rsi (r4)

rdi (r5)

rbp (r6)

rsp (r7)

r12

r13

r14

r15

xmm6-xmm15

Linux x64 (System V AMD64 ABI)

Wikipedia x86 calling conventions

Parameter

int 64bit	float 128bit
rdi (r5)	xmm0
rsi (r4)	xmm1
rdx (r3)	xmm2
rcx (r2)	xmm3
r8	xmm4
r9	xmm5
	xmm6
	xmm7

Return

int 64bit	float 128bit
rax (r0)	xmm0
rdx (r3)	xmm1

非POD の戻り値は参照渡しに変換される。rdi → rax

Saved register

rbx (r1)

rsp (r6)

rbp (r7)

r12

r13

r14

r15

ARM64 ARMv8 AArch64

ARM Procedure Call Standard for the ARM 64-bit Architecture (AArch64)

Parameter

int 64bit	float 128bit
r0	v0
r1	v1
r2	v2
r3	v3
r4	v4
r5	v5
r6	v6
r7	v7

Return

int 64bit	float 128bit
r0	v0

Saved register

r19-r29, sp

v8-v15

AArch32

r9 (sb)

r10 (sl)

r11 (fp)

r12 (ip)

r13 (sp)

r14 (lr)

r15 (pc)

HYPERでんち

目次

CPU 32bit/64bit の違いのメモ

Data Size

ISA

Function Calling convention

Windows x64

Linux x64 (System V AMD64 ABI)

ARM64 ARMv8 AArch64

AArch32