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RISC-V Instruction Set » History » Revision 49

Revision 48 (Andrei Tatarnikov, 07/26/2018 06:02 PM) → Revision 49/50 (Alexander Kamkin, 05/01/2020 10:38 AM)

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 of the meaning of the <code>Specified</code> and <code>Validated</code> columns:

To be supported in MicroTESK, instructions need to be described in formal specifications. The <code>Specified</code> column shows whether specific instructions have been 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 have been validated with tests.

_NOTE: Incomplete or invalid semantics of instruction in specifications does not mean that these instructions cannot be used in test programs. It just prevents 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 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 (specified, but not fully validated) |
{background:#fcc}. | Currently unsupported (not specified and not validated yet) |

h2. Instruction table

{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 | | | |