Architectures - natefoo/predef GitHub Wiki

Please submit updates/corrections via the process described on the wiki home page.

Alpha

Type	Macro	Description
Identification	`__alpha__`	Defined by GNU C
Version	`__alpha_ev'V'__`	V = Version
Identification	`__alpha`	Defined by DEC C
Identification	`_M_ALPHA`	Defined by Visual Studio

Example

CPU	Macro
Alpha EV4	`__alpha_ev4__`
Alpha EV5	`__alpha_ev5__`
Alpha EV6	`__alpha_ev6__`

AMD64

Type	Macro	Description
Identification	`__amd64____amd64__x86_64____x86_64`	Defined by GNU C and Sun Studio
Identification	`_M_X64_M_AMD64`	Defined by Visual Studio

Notice that x32 can be detected by checking if the CPU uses the ILP32 data model.

ARM

Type	Macro	Description
Identification	`__arm__`	Defined by GNU C and RealView
Identification	`__thumb__`	Defined by GNU C and RealView in Thumb mode
Version	`__ARM_ARCH_'V'__`	V = VersionDefined by GNU C 1
Identification	`__TARGET_ARCH_ARM__TARGET_ARCH_THUMB`	Defined by RealView
Version	`__TARGET_ARCH_ARM` = V`__TARGET_ARCH_THUMB` = V	V = Version
Version	`__TARGET_ARCH_'VR'`	VR = Version and Revision
Identification	`_ARM`	Defined by ImageCraft C
Identification	`_M_ARM`	Defined by Visual Studio
Identification	`_M_ARMT`	Defined by Visual Studio in Thumb mode
Version	`_M_ARM` = V	V = Version
Identification	`__arm`	Defined by Diab

Example

CPU	Macro	`_M_ARM`
ARM 2	`__ARM_ARCH_2__`
ARM 3	`__ARM_ARCH_3____ARM_ARCH_3M__`
ARM 4T	`__ARM_ARCH_4T____TARGET_ARM_4T`
ARM 5	`__ARM_ARCH_5____ARM_ARCH_5E__`	5
ARM 5T	`__ARM_ARCH_5T____ARM_ARCH_5TE____ARM_ARCH_5TEJ__`
ARM 6	`__ARM_ARCH_6____ARM_ARCH_6J____ARM_ARCH_6K____ARM_ARCH_6Z____ARM_ARCH_6ZK__`	6
ARM 6T2	`__ARM_ARCH_6T2__`
ARM 7	`__ARM_ARCH_7____ARM_ARCH_7A____ARM_ARCH_7R____ARM_ARCH_7M____ARM_ARCH_7S__`	7

ARM64

Type	Macro	Description
Identification	`__aarch64__`	Defined by GNU C 1

Blackfin

Type	Macro	Description
Identification	`__bfin__BFIN__`	Defined by GNU C

Convex

Type	Macro	Description
Identification	`__convex__`	Defined by GNU C
Version	`__convex_'V'__`	V = Version

Example

CPU	Macro
Convex C1	`__convex_c1__`
Convex C2	`__convex_c2__`
Convex C32xx series	`__convex_c32__`
Convex C34xx series	`__convex_c34__`
Convex C38xx series	`__convex_c38__`

Epiphany

Type	Macro
Identification	`__epiphany__`

HP/PA RISC

Type	Macro	Description
Identification	`__hppa__`	Defined by GNU C
Identification	`__HPPA__`	Defined by Stratus VOS C
Identification	`__hppa`
Version	`_PA_RISC'V'_'R'`	V = VersionR = Revision

Example

CPU	Macro
PA RISC 1.0	`_PA_RISC1_0`
PA RISC 1.1	`_PA_RISC1_1__HPPA11____PA7100__`
PA RISC 2.0	`_PA_RISC2_0__RISC2_0____HPPA20____PA8000__`

Intel x86

Type	Macro	Format	Description
Identification	`i386__i386__i386__`		Defined by GNU C
Version	`__i386____i486____i586____i686__`		Defined by GNU C
Identification	`__i386`		Defined by Sun Studio
Identification	`__i386__IA32__`		Defined by Stratus VOS C
Identification	`_M_I86`		Only defined for 16-bits architecturesDefined by Visual Studio, Digital Mars, and Watcom C/C++ (see note below)
Identification	`_M_IX86`		Only defined for 32-bits architecturesDefined by Visual Studio, Intel C/C++, Digital Mars, and Watcom C/C++
Version	`_M_IX86`	V00	V = Version
Identification	`__X86__`		Defined by Watcom C/C++
Identification	`_X86_`		Defined by MinGW32
Identification	`__THW_INTEL__`		Defined by XL C/C++
Identification	`__I86__`		Defined by Digital Mars
Version	`__I86__`	V	V = Version
Identification	`__INTEL__`		Defined by CodeWarrior
Identification	`__386`		Defined by Diab

Notice that Watcom C/C++ defines _M_IX86 for both 16-bits and 32-bits architectures. Use __386__ or _M_I386 to detect 32-bits architectures in this case.

Notice that the Stratus VOS is big-endian on IA32, so these macros cannot be used to detect endianness if __VOS__ is set.

Example

CPU	`_M_IX86`	`__I86__`
80386	300	3
80486	400	4
Pentium	500	5
Pentium Pro/II	600	6

Intel Itanium (IA-64)

Type	Macro	Format	Description
Identification	`__ia64___IA64__IA64__`		Defined by GNU C
Identification	`__ia64`		Defined by HP aCC
Identification	`_M_IA64`		Defined by Visual Studio
Identification	`_M_IA64`		Defined by Intel C/C++
Version	`_M_IA64`	?
Identification	`__itanium__`		Defined by Intel C/C++

Example

CPU	`_M_IA64` (Intel C/C++)
	64100

Motorola 68k

Type	Macro	Description
Identification	`__m68k__`	Defined by GNU C
Version	`__mc'V'____mc'V'mc'V'`	V = Version
Identification	`M68000`	Defined by SAS/C
Identification	`__MC68K__`	Defined by Stratus VOS C
Version	`__MC'V'__`	V = Version

Example

CPU	Macro
68000	`__mc68000____MC68000__`
68010	`__mc68010__`
68020	`__mc68020____MC68020__`
68030	`__mc68030____MC68030__`
68040	`__mc68040__`
68060	`__mc68060__`

MIPS

Type	Macro	Description
Identification	`__mips__mips`	Defined by GNU C
Version	`_MIPS_ISA` = `_MIPS_ISA_MIPS'V'`	V = MIPS ISA level
Version	`_R3000_R4000_R5900`
Identification	`__mips`	Defined by MIPSpro and GNU C
Version	`__mips`	The value indicates the MIPS ISA (Instruction Set Architecture) level
Version	`__MIPS_ISA'V'__`	V = MIPS ISA level
Identification	`__MIPS__`	Defined by Metrowerks

Example

CPU	`_MIPS_ISA`	GNU C Macro	`__mips`	MIPSpro Macro
R2000	`_MIPS_ISA_MIPS1`		1
R3000	`_MIPS_ISA_MIPS1`	`_R3000`	1
R6000	`_MIPS_ISA_MIPS2`		2	`__MIPS_ISA2__`
R4000		`_R4000`
R4400	`_MIPS_ISA_MIPS3`		3	`__MIPS_ISA3__`
R8000	`_MIPS_ISA_MIPS4`		4	`__MIPS_ISA4__`
R10000	`_MIPS_ISA_MIPS4`		4	`__MIPS_ISA4__`

PowerPC

Type	Macro	Description
Identification	`__powerpc__powerpc____powerpc64____POWERPC____ppc____ppc64____PPC____PPC64___ARCH_PPC_ARCH_PPC64`	Defined by GNU C
Version	`__ppc'V'__`	V = Version
Identification	`_M_PPC`	Defined by Visual Studio
Version	`_M_PPC`	?
Identification	`_ARCH_PPC_ARCH_PPC64`	Defined by XL C/C++
Version	`_ARCH_'V'`	V = Version
Version	`__PPCGECKO__`	GekkoDefined by CodeWarrior
Version	`__PPCBROADWAY__`	BroadwayDefined by CodeWarrior
Version	`_XENON`	Xenon
Identification	`__ppc`	Defined by Diab

Example

CPU	`_M_PPC`	Macro	XL Macro
PowerPC 440			`_ARCH_440`
PowerPC 450			`_ARCH_450`
PowerPC 601	601	`__ppc601__`	`_ARCH_601`
PowerPC 603	603	`__ppc603__`	`_ARCH_603`
PowerPC 604	604	`__ppc604__`	`_ARCH_604`
PowerPC 620	620

Pyramid 9810

Type	Macro
Identification	`pyr`

RS/6000

Type	Macro	Description
Identification	`__THW_RS6000`	Defined by XL C/C++
Identification	`_IBMR2`
Identification	`_POWER`
Identification	`_ARCH_PWR_ARCH_PWR2_ARCH_PWR3_ARCH_PWR4`

SPARC

Type	Macro	Description
Identification	`__sparc__`	Defined by GNU C
Identification	`__sparc`	Defined by Sun Studio
Version	`__sparc_v8____sparc_v9__`	Defined by GNU C
Version	`__sparcv8__sparcv9`	Defined by Sun Studio

Example

CPU	Sun Studio Macro	GNU C Macro
SPARC v8 (SuperSPARC)	`__sparcv8`	`__sparc_v8__`
SPARC v9 (UltraSPARC)	`__sparcv9`	`__sparc_v9__`

SuperH

Type	Macro	Description
Identification	`__sh__`	Defined by GNU C
Version	`__sh1____sh2____sh3____SH3____SH4____SH5__`

SystemZ

Type	Macro	Description
Identification	`__370____THW_370__`	Identifies System/370Defined by XL C/C++
Identification	`__s390__`	Identifies System/390Defined by GNU C
Identification	`__s390x__`	Identifies z/ArchitectureDefined by GNU C
Identification	`__zarch__`	Identifies z/ArchitectureDefined by clang
Identification	`__SYSC_ZARCH__`	Identifies z/ArchitectureDefined by Systems/C

TMS320

Type	Macro	Description
Identification	`_TMS320C2XX__TMS320C2000__`	C2000 series
Identification	`_TMS320C5X__TMS320C55X__`	C5000 series
Identification	`_TMS320C6X__TMS320C6X__`	C6000 series

Example

DSP	Macro
C28xx	`_TMS320C28X`
C54x	`_TMS320C5XX`
C55x	`__TMS320C55X__`
C6200	`_TMS320C6200`
C6400	`_TMS320C6400`
C6400+	`_TMS320C6400_PLUS`
C6600	`_TMS320C6600`
C6700	`_TMS320C6700`
C6700+	`_TMS320C6700_PLUS`
C6740	`_TMS320C6740`

TMS470

Type	Macro
Identification	`__TMS470__`