M-Profile Architecture support in GNU toolchain

M-Profile Architecture Feature	GNU Identifier	Enabled by default	Binutils	GCC	Glibc	GDB
M-Profile Vector Extension (MVE)	mve	No	2.33	GCC10 (Intrinsics)	NA	12.1
M-Profile PAC/BTI	pacbti	No	2.38	GCC13*	NA	13.1*
Arm Custom Instructions	cdecp0 cdecp1 ... cdecp7	No	2.35	GCC10	NA	NA

* Planned

A-Profile Architecture support in GNU toolchain

A-Profile Architecture Feature	Architecture Identifier	GNU Identifier	Enabled by default	Binutils	GCC	Glibc	GDB
CRC instruction	FEAT_CRC32	crc	ARMv8.1-A or later	2.25	GCC 4.9.4	NA	7.6
Floating-point extension	FEAT_FP	fp	ARMv8-A or later	2.25	GCC 4.8.5	NA	7.6
Advanced SIMD extension	FEAT_AdvSIMD	simd	ARMv8-A or later	2.25	GCC 4.8.5	NA	7.6
Limited Ordering Regions extensions	FEAT_LOR	lor	ARMv8.1-A or later	2.26	NA	NA	7.11.1
Privileged Access Never support	FEAT_PAN	pan	ARMv8.1-A or later	2.26	NA	NA	7.11.1
Round Double Multiply Accumulate instructions	FEAT_RDM	rdma	ARMv8.1-A or later	2.26	GCC 8	NA	7.11.1
FP16 extension	FEAT_FP16	fp16	ARMv8.2-A or later	2.26	GCC 7	NA	7.11.1
Statistical Profiling Extensions (SPE)	FEAT_SPE	profile	No	2.26	GCC 9	NA	7.11.1
Large System Extension (LSE)	FEAT_LSE	lse	ARMv8.1-A or later	2.27	GCC 6	NA	8.1
RAS extension	FEAT_RAS	ras	ARMv8.2-A or later	2.27	NA	NA	8.1
Scalable Vector Extension (SVE)	FEAT_SVE	sve	No	2.28	GCC10	2.30	8.2
Complex number SIMD extension	FEAT_FCMA	compnum	ARMv8.3-A or later	2.28	GCC9	NA	8.1
Weak release consistency extension	FEAT_LRCPC	rcpc	ARMv8.3-A or later	2.29	GCC 8	NA	8.1
Pointer Authentication	FEAT_PAuth, FEAT_PAuth2	pauth	ARMv8.3-A or later	2.27	GCC 7	NA	9.1
Dot Product extension	FEAT_DotProd2	dotprod	ARMv8.4-A or later	2.29	GCC 8	NA	8.1
AES cryptographic extension	FEAT_AES, FEAT_PMULL	aes	No	2.30	GCC 8	NA	8.1
SHA2 cryptographic extension		sha2	No	2.30	GCC 8	NA	8.1
FP16 fmla extension	FEAT_FHM	fp16fml	ARMv8.4-A or later	2.30	GCC 8	NA	8.1
SHA512 and SHA3 cryptographic extensions	FEAT_SHA512, FEAT_SHA3	sha3	No	2.30	GCC 8	NA	8.1
SM3 and SM4 cryptographic extensions	FEAT_SM3, FEAT_SM4	sm4	No	2.30	GCC 8	NA	8.1
Memory Tagging Extension (MTE)	FEAT_MTE	memtag	No	2.33	GCC9	2.33	11.1
MTE heap tagging	FEAT_MTE		No	2.33	GCC10	2.33	11.1
MTE stack tagging	FEAT_MTE		No	Future	Future	Future	Future
Branch Target Indicators (BTI)	FEAT_BTI		No	2.33	GCC 9	2.32	12.1
Execution and Data and Prediction instructions	FEAT_SPECRES	predres	ARMv8.5-A or later	2.32	GCC 9	NA	8.3
Random number instructions	FEAT_RNG	rng	No	2.32	GCC 9	NA	8.3
Speculation barrier instruction sb	FEAT_SB	sb	ARMv8.5-A or later	2.32	GCC 9	NA	8.3
Speculative store bypass safe	FEAT_SSBS	ssbs	ARMv8.5-A or later	2.32	GCC 9	NA	NA
Bfloat16	FEAT_BF16	bf16	ARMv8.6-A or later	2.34	GCC10	NA	11.1
FP32 and FP64 Matrix Multiplier Extension	FEAT_F32MM, FEAT_F64MM	f32mm,f64mm	No	2.34	GCC10	NA	9.1
Int8 Matrix Multiplier Extension	FEAT_I8MM	i8mm	ARMv8.6-A or later	2.34	GCC10	NA	9.1
Scalable Vector Extension v2 (SVE2)	FEAT_SVE2	sve2	No	2.33	GCC10	2.30	9.1
Transactional Memory Extension (TME)	FEAT_TME	tme	No	2.33	GCC10	Future	Future
Scalable Vector AES instructions	FEAT_SVE_AES	sve2-aes	ARMv9.0-A or later	2.33	Future	Future	Future
Scalable Vector PMULL instructions	FEAT_SVE_PMULL128		ARMv9.0-A or later	2.33	Future	Future	Future
Scalable Vector EOR3, RAX1, XAR, and BCAX instrs	FEAT_SVE_SHA3	sve2-sha3	ARMv9.0-A or later	2.33	Future	Future	Future
Scalable Vector SM4 instructions	FEAT_SVE_SM4	sve2-sm4	ARMv9.0-A or later	2.33	Future	Future	Future
Scalable Vector Bit Permutes	FEAT_SVE_BitPerm	sve2-bitperm	ARMv9.0-A or later	2.33	Future	Future	Future
Support for 64-byte load/stores (LS64)	FEAT_LS64 (without return) FEAT_LS64_V (with return) FEAT_LS64_ACCDATA (EL0 stores with return)	ls64	2020 Architecture update ARMv8.7-A or later ARMv9.2-A or later	2.36	GCC12.1	NA	Future
MTE Asymmetric Fault Handling	FEAT_MTE3	memtag	2020 Architecture update ARMv8.7-A or later ARMv9.2-A or later	NA	NA	2.35	NA
WFE and WFI instructions with timeout	FEAT_WFxT		2020 Architecture update ARMv8.7-A or later ARMv9.2-A or later	2.36	NA	NA	NA
Branch Record Buffer Extensions	FEAT_BRBE	brbe	2020 Architecture update ARMv8.7-A or later ARMv9.2-A or later	2.36	NA	NA	NA
Realm Management Extension	FEAT_RME		2020 Architecture update ARMv8.7-A or later ARMv9.2-A or later	2.37	NA	NA	NA
Memory operations [memcpy]	FEAT_MOPS	mops	2021 Architecture update ARMv8.8-A or later ARMv9.3-A or later	2.38	GCC12	Future	Future
Scalable Matrix Extension	FEAT_SME	sme	2021 Architecture update ARMv8.8-A or later ARMv9.3-A or later	2.38	GCC14*	2.38*	14.1*

* Planned

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