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RISC-V Instruction Set » History » Revision 42

Revision 41 (Andrei Tatarnikov, 07/26/2018 05:41 PM) → Revision 42/50 (Andrei Tatarnikov, 07/26/2018 06:00 PM)

h1. Instructions supported by MicroTESK for RISC-V 

 The table below shows the status of support for particular instructions in MicroTESK for RISC-V. 

 Here is the explanation There are three stages of the meaning of the <code>Specified</code> and <code>Validated</code> columns: support marked with different colors: 
 {background:#cfc}. | Fully supported | 
 {background:#ff9}. | Partially supported | 
 {background:#fcc}. | Currently unsupported | 

 To be supported in MicroTESK, instructions need to be described in formal specifications. The <code>Specified</code> column shows whether specific instructions were described in the specifications. 

 The instruction semantics described in specifications may be incomplete or invalid. Therefore, instruction specifications must be validated with tests (e.g. ones ported from https://github.com/riscv/riscv-tests). To perform validation, the tests are executed in an ISA simulator constructed on the basis of the specifications. The <code>Validated</code> column shows whether the specifications of specific instructions were validated with tests. 

 NOTE: Incomplete or invalid semantics of instruction in specifications does not that these instructions cannot be used in test programs. It just prevents prevent using them in tests that require information on the current state of registers and memory (e.g. self-checking tests and constraint-based tests). In general, to generate random tests, only the syntax of instructions is required to be valid while whereas the semantics may be incomplete.  

 There are three statuses of support based on the two columns and marked with colors: 

 {background:#cfc}. | Fully supported (fully specified and validated) | 
 {background:#ff9}. | Partially supported (specified, but not fully validated) | 
 {background:#fcc}. | Currently unsupported (not specified and not validated yet) | 

 {font-weight:bold; background:#ddd}. | Instruction Set | Instructions | Specified | Validated | 
 {background:#cfc}. | *RV32I (User)* | LUI 
                                AUIPC 
                                JAL 
                                JALR 
                                BEQ 
                                BNE 
                                BLT 
                                BGE 
                                BLTU 
                                BGEU 
                                LB 
                                LH 
                                LW 
                                LBU 
                                LHU 
                                SB 
                                SH 
                                SW 
                                ADDI 
                                SLTI 
                                SLTIU 
                                XORI 
                                ORI 
                                ANDI 
                                SLLI 
                                SRLI 
                                SRAI 
                                SLL 
                                SRL 
                                SRA 
                                ADD 
                                SUB 
                                SLT 
                                SLTU 
                                XOR 
                                OR 
                                AND | Yes (37/37) | Yes (37/37) | 
 {background:#cfc}. | *RV64I (User)* | LWU 
                                LD 
                                SD 
                                ADDIW 
                                SLLIW 
                                SRLIW 
                                SRAIW 
                                ADDW 
                                SUBW 
                                SLLW 
                                SRLW 
                                SRAW | Yes (12/12) | Yes (12/12) | 
 {background:#ff9}. | *RV32I (System)* | ECALL 
                                         EBREAK 
                                         FENCE 
                                         FENCE.I 
                                         MRET 
                                         SRET 
                                         URET 
                                         WFI 
                                         CSRRW 
                                         CSRRS 
                                         CSRRC 
                                         CSRRWI 
                                         CSRRSI 
                                         CSRRCI | Yes (14/14) | No (0/14) | 
 {background:#cfc}. | *RV32M* | MUL 
                                MULH 
                                MULHSU 
                                MULHU 
                                DIV 
                                DIVU 
                                REM 
                                REMU | Yes (8/8) | Yes (8/8) | 
 {background:#cfc}. | *RV64M* | MULW 
                                DIVW 
                                DIVUW 
                                REMW 
                                REMUW | Yes (5/5) | Yes (5/5) | 
 {background:#cfc}. | *RV32A* | LR.W 
                                SC.W 
                                AMOSWAP.W 
                                AMOADD.W 
                                AMOXOR.W 
                                AMOAND.W 
                                AMOOR.W 
                                AMOMIN.W 
                                AMOMAX.W 
                                AMOMINU.W 
                                AMOMAXU.W | Yes (11/11) | Yes (11/11) | 
 {background:#cfc}. | *RV64A* | LR.D 
                                SC.D 
                                AMOSWAP.D 
                                AMOADD.D 
                                AMOXOR.D 
                                AMOAND.D 
                                AMOOR.D 
                                AMOMIN.D 
                                AMOMAX.D 
                                AMOMINU.D 
                                AMOMAXU.D | Yes (11/11) | Yes (11/11) | 
 {background:#ff9}. | *RV32F* | FLW 
                                FSW 
                                FMADD.S 
                                FMSUB.S 
                                FNMSUB.S 
                                FNMADD.S 
                                FADD.S 
                                FSUB.S 
                                FMUL.S 
                                FDIV.S 
                                FSQRT.S 
                                FSGNJ.S 
                                FSGNJN.S 
                                FSGNJX.S 
                                FMIN.S 
                                FMAX.S 
                                FCVT.W.S 
                                FCVT.WU.S 
                                FMV.X.W (FMV.X.S) 
                                FEQ.S 
                                FLT.S 
                                FLE.S 
                                FCLASS.S 
                                FCVT.S.W 
                                FCVT.S.WU 
                                FMV.W.X (FMV.S.X) | Yes (26/26) | Partially (8/26) 
                                                                  Including (8):  
                                                                  FLW 
                                                                  FSW 
                                                                  FEQ_S 
                                                                  FLE_S 
                                                                  FLT_S 
                                                                  FEQ_S 
                                                                  FLE_S 
                                                                  FLT_S | 
 {background:#ff9}. | *RV64F* | FCVT.L.S 
                                FCVT.LU.S 
                                FCVT.S.L 
                                FCVT.S.LU | Yes (4/4) | Partially (0/4) | 
 {background:#ff9}. | *RV32D* | FLD 
                                FSD 
                                FMADD.D 
                                FMSUB.D 
                                FNMSUB.D 
                                FNMADD.D 
                                FADD.D 
                                FSUB.D 
                                FMUL.D 
                                FDIV.D 
                                FSQRT.D 
                                FSGNJ.D 
                                FSGNJN.D 
                                FSGNJX.D 
                                FMIN.D 
                                FMAX.D 
                                FCVT.S.D 
                                FCVT.D.S 
                                FEQ.D 
                                FLT.D 
                                FLE.D 
                                FCLASS.D 
                                FCVT.W.D 
                                FCVT.WU.D 
                                FCVT.D.W 
                                FCVT.D.WU | Yes (26/26) | Partially (2/26)  
                                                          Including (2): 
                                                          FLD 
                                                          FSD | 
 {background:#ff9}. | *RV64D* | FCVT.L.D 
                                FCVT.LU.D 
                                FMV.X.D 
                                FCVT.D.L 
                                FCVT.D.LU 
                                FMV.D.X     | Yes (6/6) | No (0/6)    | 
 {background:#ff9}. | *RVC*     | C.ADDI4SPN 
                                C.FLD 
                                C.LQ 
                                C.LW 
                                C.FLW 
                                C.LD 
                                C.FSD 
                                C.SQ 
                                C.SW 
                                C.FSW 
                                C.SD 
                                C.NOP 
                                C.ADDI 
                                C.JAL 
                                C.ADDIW 
                                C.LI 
                                C.ADDI16SP 
                                C.LUI 
                                C.SRLI 
                                C.SRLI64 
                                C.SRAI 
                                C.SRAI64 
                                C.ANDI 
                                C.SUB 
                                C.XOR 
                                C.OR 
                                C.AND 
                                C.SUBW 
                                C.ADDW 
                                C.J 
                                C.BEQZ 
                                C.BNEZ 
                                C.SLLI 
                                C.SLLI64 
                                C.FLDSP 
                                C.LQSP 
                                C.LWSP 
                                C.FLWSP 
                                C.LDSP 
                                C.JR 
                                C.MV 
                                C.EBREAK 
                                C.JALR 
                                C.ADD 
                                C.FSDSP 
                                C.SQSP 
                                C.SWSP 
                                C.FSWSP 
                                C.SDSP | Yes (49/49) | Partially (36/49) 
                                                       Excluding (13):  
                                                       C.LQ 
                                                       C.FLW 
                                                       C.SQ 
                                                       C.FSW 
                                                       C.NOP 
                                                       C.SRLI64 
                                                       C.SRAI64 
                                                       C.SLLI64 
                                                       C.LQSP 
                                                       C.FLWSP 
                                                       C.EBREAK 
                                                       C.SQSP 
                                                       C.FSWSP | 
 {background:#fcc}. | *RV64Q* | | No | No | 
 {background:#fcc}. | *RV32V* | VADD 
                                VSUB 
                                VSL 
                                VSR 
                                VAND 
                                VOR 
                                VXOR 
                                VSEQ 
                                VSNE 
                                VSLT 
                                VSGE 
                                VCLIP 
                                VCVT 
                                VMPOP 
                                VMFIRST 
                                VEXTRACT 
                                VINSERT 
                                VMERGE 
                                VSELECT 
                                VSLIDE 
                                VDIV 
                                VREM 
                                VMUL 
                                VMULH 
                                VMIN 
                                VMAX 
                                VSGNJ 
                                VSGNJN 
                                VSGNJX 
                                VSQRT 
                                VCLASS 
                                VPOPC 
                                VADDI 
                                VSLI 
                                VSRI 
                                VANDI 
                                VORI 
                                VXORI 
                                VCLIPI 
                                VMADD 
                                VMSUB 
                                VNMADD 
                                VNMSUB | No | No | 
 {background:#ddd}. | Total |    |     | |