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