痞子衡嵌入式：ARM Cortex-M内核那些事（5）- 指令集

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　　大家好，我是痞子衡，是正经搞技术的痞子。今天痞子衡给大家介绍的是ARM Cortex-M指令集。

指令集	指令长度 (bits)	包含指令	Cortex M0	Cortex M0+	Cortex M1	Cortex M3	Cortex M4	Cortex M7	Cortex M23	Cortex M33
Thumb-1	16	ADC, ADD, ADR, AND, ASR, B, BIC, BKPT, BLX, BX, CMN, CMP, CPS, EOR, LDM, LDR, LDRB, LDRH, LDRSB, LDRSH, LSL, LSR, MOV, MUL, MVN, NOP, ORR, POP, PUSH, REV, REV16, REVSH, ROR, RSB, SBC, SEV, STM, STMIA, STR, STRB, STRH, SUB, SVC, SXTB, SXTH, TST, UXTB, UXTH, WFE, WFI, YIELD	Y	Y	Y	Y	Y	Y	Y	Y
		CBNZ, CBZ（比较为零/非零跳转）	N	N	N	Y	Y	Y	Y	Y
		IT（根据指定的条件来执行后面相继的四条指令）	N	N	N	Y	Y	Y	N	Y
Thumb-2	32	BL, DMB, DSB, ISB, MRS, MSR	Y	Y	Y	Y	Y	Y	Y	Y
		ADC, ADD, ADR, AND, ASR, B, BFC, BFI, BIC, CDP, CLREX, CLZ, CMN, CMP, DBG, EOR, LDC, LDMA, LDMDB, LDR, LDRB, LDRBT, LDRD, LDREX, LDREXB, LDREXH, LDRH, LDRHT, LDRSB, LDRSBT, LDRSHT, LDRSH, LDRT, MCR, LSL, LSR, MLS, MCRR, MLA, MOV, MOVT, MRC, MRRC, MUL, MVN, NOP, ORN, ORR, PLD, PLDW, PLI, POP, PUSH, RBIT, REV, REV16, REVSH, ROR, RRX, RSB, SBC, SBFX, SEV, SMLAL, SMULL, SSAT, STC, STMDB, STR, STRB, STRBT, STRD, STREX, STREXB, STREXH, STRH, STRHT, STRT, SUB, SXTB, SXTH, TBB, TBH, TEQ, TST, UBFX, UMLAL, UMULL, USAT, UXTB, UXTH, WFE, WFI, YIELD	N	N	N	P	Y	Y	N	Y
		SDIV, UDIV（除法）	N	N	N	Y	Y	Y	Y	Y
数字信号处理	32	PKH, QADD, QADD16, QADD8, QASX, QDADD, QDSUB, QSAX, QSUB, QSUB16, QSUB8, SADD16, SADD8, SASX, SEL, SHADD16, SHADD8, SHASX, SHSAX, SHSUB16, SHSUB8, SMLABB, SMLABT, SMLATB, SMLATT, SMLAD, SMLALBB, SMLALBT, SMLALTB, SMLALTT, SMLALD, SMLAWB, SMLAWT, SMLSD, SMLSLD, SMMLA, SMMLS, SMMUL, SMUAD, SMULBB, SMULBT, SMULTT, SMULTB, SMULWT, SMULWB, SMUSD, SSAT16, SSAX, SSUB16, SSUB8, SXTAB, SXTAB16, SXTAH, SXTB16, UADD16, UADD8, UASX, UHADD16, UHADD8, UHASX, UHSAX, UHSUB16, UHSUB8, UMAAL, UQADD16, UQADD8, UQASX, UQSAX, UQSUB16, UQSUB8, USAD8, USADA8, USAT16, USAX, USUB16, USUB8, UXTAB, UXTAB16, UXTAH, UXTB16	N	N	N	N	Y	Y	N	O
单精度浮点	32	VABS, VADD, VCMP, VCMPE, VCVT, VCVTR, VDIV, VLDM, VLDR, VMLA, VMLS, VMOV, VMRS, VMSR, VMUL, VNEG, VNMLA, VNMLS, VNMUL, VPOP, VPUSH, VSQRT, VSTM, VSTR, VSUB	N	N	N	N	O	O	N	O
双精度浮点	32	VCVTA, VCVTM, VCVTN, VCVTP, VMAXNM, VMINNM, VRINTA, VRINTM, VRINTN, VRINTP, VRINTR, VRINTX, VRINTZ, VSEL	N	N	N	N	N	O	N	N
TrustZone	16	BLXNS, BXNS	N	N	N	N	N	N	O	O
	32	SG, TT, TTT, TTA, TTAT	N	N	N	N	N	N	O	O

Y - 支持
N - 不支持
P - 部分支持
O - 可选支持