def illegal_compressed_op_c(self):
with vsc.if_then(self.exception == illegal_instr_type_e.kIllegalCompressedOpcode):
self.c_op != 1
with vsc.if_then(self.legal_c00_opcode.size == 8):
self.c_op != 0
with vsc.else_then():
self.c_msb.not_inside(vsc.rangelist(self.legal_c00_opcode))
with vsc.if_then(self.legal_c10_opcode.size == 8):
self.c_op != 2
with vsc.else_then():
self.c_msb.not_inside(vsc.rangelist(self.legal_c10_opcode))
def illegal_func3_c(self):
vsc.solve_order(self.opcode, self.func3)
with vsc.if_then(self.compressed == 0):
with vsc.if_then(
self.exception == illegal_instr_type_e.kIllegalFunc3):
with vsc.if_then(self.opcode == 103):
self.func3 != 0
with vsc.if_then(self.opcode == 99):
self.func3.inside(vsc.rangelist(2, 3))
with vsc.if_then(self.xlen == 32):
with vsc.if_then(self.opcode == 35):
self.func3 >= 3
with vsc.if_then(self.opcode == 3):
self.func3.inside(vsc.rangelist(3, 7))
with vsc.else_then():
with vsc.if_then(self.opcode == 35):
self.func3 > 3
with vsc.if_then(self.opcode == 3):
self.func3 == 7
with vsc.if_then(self.opcode == 15):
self.func3.not_inside(vsc.rangelist(0, 1))
with vsc.if_then(self.opcode == 115):
self.func3 == 4
with vsc.if_then(self.opcode == 27):
self.func3.not_inside(vsc.rangelist(0, 1, 5))
with vsc.if_then(self.opcode == 59):
self.func3.inside(vsc.rangelist(2, 3))
self.opcode.inside(
vsc.rangelist(103, 99, 3, 35, 15, 115, 27, 59))
with vsc.else_then():
with vsc.if_then(self.opcode == 103):
self.func3 == 0
with vsc.if_then(self.opcode == 99):
self.func3.inside(vsc.rangelist(2, 3))
with vsc.if_then(self.xlen == 32):
with vsc.if_then(self.opcode == 35):
self.func3 < 3
with vsc.if_then(self.opcode == 3):
self.func3.inside(vsc.rangelist(3, 7))
with vsc.else_then():
with vsc.if_then(self.opcode == 35):
self.func3 <= 3
with vsc.if_then(self.opcode == 3):
self.func3 != 7
with vsc.if_then(self.opcode == 15):
self.func3.inside(vsc.rangelist(0, 1))
with vsc.if_then(self.opcode == 115):
self.func3 != 4
with vsc.if_then(self.opcode == 27):
self.func3.inside(vsc.rangelist(0, 1, 5))
with vsc.if_then(self.opcode == 59):
self.func3.not_inside(vsc.rangelist(2, 3))
def mtvec_c(self):
self.mtvec_mode.inside(
vsc.rangelist(mtvec_mode_t.DIRECT, mtvec_mode_t.VECTORED))
with vsc.if_then(self.mtvec_mode == mtvec_mode_t.DIRECT):
vsc.soft(self.tvec_alignment == 2)
with vsc.else_then():
vsc.soft(self.tvec_alignment == (rcs.XLEN * 4) // 8)
def illegal_opcode_c(self):
vsc.solve_order(self.opcode, self.instr_bin)
with vsc.if_then(self.exception == illegal_instr_type_e.kIllegalOpcode):
self.opcode.not_inside(vsc.rangelist(self.legal_opcode))
self.opcode[1:0] == 3
with vsc.else_then():
self.opcode.inside(vsc.rangelist(self.legal_opcode))
def has_func7_c(self):
vsc.solve_order(self.opcode, self.func7)
with vsc.if_then((self.opcode == 19) and (self.func3 == 1 or self.func3 == 5) or
(self.opcode == 51 or self.opcode == 59)):
self.has_func7 == 1
with vsc.else_then():
self.has_func7 == 0
def addr_translation_c(self):
with vsc.if_then(
(self.init_privil_mode != privileged_mode_t.MACHINE_MODE)
& (self.SATP_MODE != satp_mode_t.BARE)):
self.virtual_addr_translation_on == 1
with vsc.else_then():
self.virtual_addr_translation_on == 0
def aligned_amo_c(self):
with vsc.foreach(self.offset, idx = True) as i:
with vsc.if_then(self.XLEN == 32):
self.offset[i] % 4 == 0
with vsc.else_then():
self.offset[i] % 8 == 0
def has_func3_c(self):
vsc.solve_order(self.opcode, self.func7)
with vsc.if_then(self.opcode == 55 or self.opcode == 111
or self.opcode == 23):
self.has_func3 == 0
with vsc.else_then():
self.has_func3 == 1
def legal_rv32_c_slli(self):
with vsc.if_then((self.c_msb == 0) and (self.c_op == 2)
and (self.xlen == 32)):
with vsc.if_then(self.exception ==
illegal_instr_type_e.kReservedCompressedInstr):
self.instr_bin[12] == 1
with vsc.else_then():
self.instr_bin[12] == 0
def ab_c(self):
self.a == 1
with vsc.if_then(self.a == 1):
self.b == 1
with vsc.else_then():
self.b == 2
def mtvec_c(self):
self.mtvec_mode.inside(vsc.rangelist(self.supported_interrupt_mode))
with vsc.if_then(self.mtvec_mode == mtvec_mode_t.DIRECT):
vsc.soft(self.tvec_alignment == 2)
with vsc.else_then():
# Setting MODE = Vectored may impose an additional alignmentconstraint on BASE,
# requiring up to 4×XLEN-byte alignment
vsc.soft(self.tvec_alignment == self.tvec_ceil)
def illegal_func7_c(self):
with vsc.if_then(self.compressed == 0):
with vsc.if_then(self.exception == illegal_instr_type_e.kIllegalFunc7):
self.func7.not_inside(vsc.rangelist(0, 32, 1))
with vsc.if_then(self.opcode == 9): # SLLI, SRLI, SRAI
self.func7[6:1].not_inside(vsc.rangelist(0, 16))
with vsc.else_then():
self.func7.inside(vsc.rangelist(0, 32, 1))
def mstatus_c(self):
with vsc.if_then(self.set_mstatus_mprv == 1):
self.mstatus_mprv == 1
with vsc.else_then():
self.mstatus_mprv == 0
with vsc.if_then(self.SATP_MODE == satp_mode_t.BARE):
self.mstatus_mxr == 0
self.mstatus_sum == 0
self.mstatus_tvm == 0
def post_randomize(self):
last_level = 0
last_level = self.stack_level[self.program_cnt - 1]
for i in range(len(self.program_h)):
self.program_h[i].program_id = i
self.program_h[i].call_stack_level = self.stack_level[i]
# Top-down generate the entire call stack.
# A program can only call the programs in the next level.
for i in range(last_level):
program_list = []
next_program_list = []
sub_program_id_pool = vsc.randlist_t()
sub_program_cnt = []
idx = 0
for j in range(self.program_cnt):
if self.stack_level[j] == i:
program_list.append(j)
if self.stack_level[j] == i + 1:
next_program_list.append(j)
# Randmly duplicate some sub programs in the pool to create a case that
# one sub program is called by multiple caller. Also it's possible to call
# the same sub program in one program multiple times.
total_sub_program_cnt = random.randrange(
len(next_program_list),
len(next_program_list) + 1)
sub_program_id_pool = [0] * total_sub_program_cnt
for i in range(len(sub_program_id_pool)):
with sub_program_id_pool[i].randomize_with():
with vsc.if_then(sub_program_id_pool[i]):
sub_program_id_pool[i] == next_program_list[i]
with vsc.else_then():
sub_program_id_pool[i].inside(
vsc.rangelist(next_program_list))
random.shuffle(sub_program_id_pool)
sub_program_cnt = [0] * len(program_list)
logging.info(
"{} programs @Lv{}-> {} programs at next level".format(
len(program_list), i, len(sub_program_id_pool)))
# Distribute the programs of the next level among the programs of current level
# Make sure all program has a caller so that no program is obsolete.
for j in range(len(sub_program_id_pool)):
caller_id = random.randrange(0, len(sub_program_cnt) - 1)
sub_program_cnt[caller_id] += 1
for j in range(len(program_list)):
id = program_list[j]
self.program_h[id].sub_program_id = [0] * sub_program_cnt[j]
logging.info(
"{} sub programs are assigned to program[{}]".format(
sub_program_cnt[j], id))
for k in range(len(self.program_h[id].sub_program_id)):
self.program_h[id].sub_program_id[k] = sub_program_id_pool[
idx]
idx += 1
def exception_type_c(self):
with vsc.if_then(self.compressed == 1):
self.exception.inside(vsc.rangelist(illegal_instr_type_e.kReservedCompressedInstr,
illegal_instr_type_e.kIllegalCompressedOpcode,
illegal_instr_type_e.kHintInstr))
with vsc.else_then():
self.exception.inside(vsc.rangelist(illegal_instr_type_e.kIllegalOpcode,
illegal_instr_type_e.kIllegalFunc3,
illegal_instr_type_e.kIllegalFunc7,
illegal_instr_type_e.kIllegalSystemInstr))
with vsc.if_then(self.has_func7 == 0):
self.exception != illegal_instr_type_e.kIllegalFunc7
with vsc.if_then(self.has_func3 == 0):
self.exception != illegal_instr_type_e.kIllegalFunc3
def system_instr_c(self):
with vsc.if_then(self.exception == illegal_instr_type_e.kIllegalSystemInstr):
self.opcode == 115
# ECALL/EBREAK/xRET/WFI
with vsc.if_then(self.func3 == 0):
# Constrain RS1 and RD to be non-zero
self.instr_bin[19:15] != 0
self.instr_bin[11:7] != 0
# Valid SYSTEM instructions considered by this
# Constrain the upper 12 bits to be invalid
self.instr_bin[31:20].not_inside(vsc.rangelist(0, 1, 2, 258, 770, 1970, 261))
with vsc.else_then():
# Invalid CSR instructions
self.instr_bin[31:20].not_inside(vsc.rangelist(self.csrs))
def instr_bit_assignment_c(self):
vsc.solve_order(self.opcode, self.instr_bin)
vsc.solve_order(self.func3, self.instr_bin)
vsc.solve_order(self.func7, self.instr_bin)
vsc.solve_order(self.c_msb, self.instr_bin)
# vsc.solve_order(self.c_op, self.instr_bin)
with vsc.if_then(self.compressed == 1):
self.instr_bin[1:0] == self.c_op
self.instr_bin[15:13] == self.c_msb
with vsc.else_then():
self.instr_bin[6:0] == self.opcode
with vsc.if_then(self.has_func7 == 1):
self.instr_bin[31:25] == self.func7
with vsc.if_then(self.has_func3 == 1):
self.instr_bin[14:12] == self.func3
def ab_c(self):
self.a == 5
with vsc.if_then(self.a == 1):
self.b == 1
with vsc.else_if(self.a == 2):
self.b == 2
with vsc.else_if(self.a == 3):
self.b == 4
with vsc.else_if(self.a == 4):
self.b == 8
with vsc.else_if(self.a == 5):
self.b == 16
with vsc.else_then():
self.b == 0
def loop_c(self):
vsc.solve_order(self.num_of_nested_loop, self.loop_init_val)
vsc.solve_order(self.num_of_nested_loop, self.loop_step_val)
vsc.solve_order(self.num_of_nested_loop, self.loop_limit_val)
vsc.solve_order(self.loop_limit_val, self.loop_limit_reg)
vsc.solve_order(self.branch_type, self.loop_init_val)
vsc.solve_order(self.branch_type, self.loop_step_val)
vsc.solve_order(self.branch_type, self.loop_limit_val)
self.num_of_instr_in_loop.inside(vsc.rangelist((1, 25)))
self.num_of_nested_loop.inside(vsc.rangelist(1, 2))
self.loop_init_val.size.inside(vsc.rangelist(1, 2))
self.loop_step_val.size.inside(vsc.rangelist(1, 2))
self.loop_limit_val.size.inside(vsc.rangelist(1, 2))
self.branch_type.size.inside(vsc.rangelist(1, 2))
self.loop_init_val.size == self.num_of_nested_loop
self.branch_type.size == self.num_of_nested_loop
self.loop_step_val.size == self.num_of_nested_loop
self.loop_limit_val.size == self.num_of_nested_loop
self.branch_type.size == self.num_of_nested_loop
with vsc.foreach(self.branch_type, idx=True) as i:
with vsc.if_then(cfg.disable_compressed_instr == 0):
self.branch_type[i].inside(
vsc.rangelist(
riscv_instr_name_t.C_BNEZ, riscv_instr_name_t.C_BEQZ,
riscv_instr_name_t.BEQ, riscv_instr_name_t.BNE,
riscv_instr_name_t.BLTU, riscv_instr_name_t.BLT,
riscv_instr_name_t.BGEU, riscv_instr_name_t.BGE))
with vsc.else_then():
self.branch_type[i].inside(
vsc.rangelist(riscv_instr_name_t.BEQ,
riscv_instr_name_t.BNE,
riscv_instr_name_t.BLTU,
riscv_instr_name_t.BLT,
riscv_instr_name_t.BGEU,
riscv_instr_name_t.BGE))
with vsc.foreach(self.loop_init_val, idx=True) as i:
with vsc.if_then(self.branch_type[i].inside(
vsc.rangelist(riscv_instr_name_t.C_BNEZ,
riscv_instr_name_t.C_BEQZ))):
self.loop_limit_val[i] == 0
self.loop_limit_reg[i] == riscv_reg_t.ZERO
self.loop_cnt_reg[i].inside(vsc.rangelist(compressed_gpr))
with vsc.else_then:
self.loop_limit_val[i].inside(vsc.rangelist((-20, 20)))
self.loop_limit_reg[i] != riscv_reg_t.ZERO
with vsc.if_then(self.branch_type[i].inside(
vsc.rangelist(riscv_instr_name_t.C_BNEZ,
riscv_instr_name_t.C_BEQZ,
riscv_instr_name_t.BEQ,
riscv_instr_name_t.BNE))):
self.loop_limit_val[i] != self.loop_init_val[i]
((self.loop_limit_val[i] - self.loop_init_val[i]) %
self.loop_step_val[i]) == 0
with vsc.else_if(self.branch_type[i] == riscv_instr_name_t.BGE):
self.loop_step_val[i] < 0
with vsc.else_if(self.branch_type[i].inside(
vsc.rangelist(riscv_instr_name_t.BGEU))):
self.loop_step_val[i] < 0
self.loop_init_val[i] > 0
# Avoid count to negative
(self.loop_step_val[i] + self.loop_limit_val[i]) > 0
with vsc.else_if(self.branch_type[i] == riscv_instr_name_t.BLT):
self.loop_step_val[i] > 0
with vsc.else_if(self.branch_type[i] == riscv_instr_name_t.BLTU):
self.loop_step_val[i] > 0
self.loop_limit_val[i] > 0
self.loop_init_val[i].inside(vsc.rangelist((-10, 10)))
self.loop_step_val[i].inside(vsc.rangelist((-10, 10)))
with vsc.if_then(self.loop_init_val[i] < self.loop_limit_val[i]):
self.loop_step_val[i] > 0
with vsc.else_then:
self.loop_step_val[i] < 0
def floating_point_c(self):
with vsc.if_then(self.enable_floating_point):
self.mstatus_fs == 1
with vsc.else_then():
self.mstatus_fs == 0
def my_a_c(self):
self.a < 10
with vsc.if_then(self.a == 2):
self.b < 1000
with vsc.else_then():
self.b < 2000
def ab_c(self):
with vsc.if_then(self.a < self.b):
self.c < self.d
with vsc.else_then():
self.c == self.d
def mtvec_c(self):
self.mtvec_mode.inside(vsc.rangelist(self.supported_interrupt_mode))
with vsc.if_then(self.mtvec_mode == mtvec_mode_t.DIRECT):
vsc.soft(self.tvec_alignment == 2)
with vsc.else_then():
vsc.soft(self.tvec_alignment == self.tvec_ceil)
