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from .instructions import Instruction, InstructionSet
from ctypes import c_uint32
from .RV32I import *
RV64I = InstructionSet()
class ShiftImm64(ShiftImm):
# NOTE: This is an special type used for shifting operations because they
# have 7 bits left after the maximum shift (5bits -> 32 rotations)
# they can apply.
# In RV64I they can indicate rotation with 1 bit more (64 rotations) so
# they use a funct6 instead.
funct6 = None
funct3 = None
opcode = None
def __init__(self, rd, rs, imm):
self.rd = rd
self.rs = rs
self.imm = imm
def compile(self):
return c_uint32(
(self.funct6 << 26) +\
(self.imm << 20) +\
(self.rs << 15) +\
(self.funct3 << 12) +\
(self.rd << 7) +\
self.opcode
)
@RV64I.instruction
class slli(ShiftImm64):
name = "slli"
opcode = 0b0010011
funct3 = 0b001
funct6 = 0b000000
@RV64I.instruction
class srli(ShiftImm64):
name = "srli"
opcode = 0b0010011
funct3 = 0b101
funct6 = 0b000000
@RV64I.instruction
class srai(ShiftImm64):
name = "srai"
opcode = 0b0010011
funct3 = 0b101
funct6 = 0b010000
@RV64I.instruction
class sd(S):
name = "sd"
opcode = 0b0100011
funct3 = 0b011
@RV64I.instruction
class ld(I):
name = "ld"
opcode = 0b0000011
funct3 = 0b011
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