def sext( value, nbits ):
value = trim( value, nbits )
sign_mask = 0x1 << (nbits - 1)
mask = trim_64( r_ulonglong( 0xffffffffffffff ) << nbits )
if value & sign_mask:
return mask | value
return value
def sext(value, nbits):
value = trim(value, nbits)
sign_mask = 0x1 << (nbits - 1)
mask = trim_64(r_ulonglong(0xffffffffffffff) << nbits)
if value & sign_mask:
return mask | value
return value
def sext_32(value):
value = r_ulonglong(value)
value = 0x00000000ffffffff & value
if value & 0x80000000:
return r_ulonglong(0xffffffff00000000) | value
return value
def trim_64(value):
value = r_ulonglong(value)
return value & r_ulonglong(0xffffffffffffffff)
def trim(value, nbits):
value = r_ulonglong(value)
mask = r_ulonglong(0xffffffffffffffff) >> (64 - nbits)
return value & mask
def __init__( self, memory, debug, reset_addr=0x400,
xlen=64,
flen=64,
extensions="imafd" ):
self.pc = reset_addr
self.xlen = xlen # defines the bitwidth of int registers
self.flen = flen # defines the bitwidth of fp registers
# TODO: convert to lower
self.extensions = extensions
self.rf = RiscVRegisterFile( nbits=self.xlen )
self.csr = Csr( self )
# TODO: a bit hacky...
if self.extension_enabled( "f" ):
self.fp = RiscVFPRegisterFile()
self.fp.debug = debug
self.fcsr = r_ulonglong( 0 ) # Bits( 32 )
self.mem = memory
if self.extension_enabled( "a" ):
self.load_reservation = 0 # Bits( 64 )
self .debug = debug
self.rf .debug = debug
self.mem.debug = debug
# other state
self.prv = PRV_M
self.mepc = 0
self.mbadaddr = 0
self.mtimecmp = 0
self.mscratch = 0
self.mcause = 0
self.minstret = 0
self.mie = 0
self.mip = 0
self.sepc = 0
self.sbadaddr = 0
self.sscratch = 0
self.stvec = 0
self.sptbr = 0
self.scause = 0
self.sutime_delta = 0
self.suinstret_delta = 0
self.tohost = 0
self.fromhost = 0
# coprocessor registers
self.status = 0
self.stats_en = 0
self.num_insts = 0
self.stat_num_insts = 0
# we need a dedicated running flag bacase status could be 0 on a
# syscall_exit
self.running = True
# indicate if this is running a self-checking test
self.testbin = False
# executable name
self.exe_name = ""
# syscall stuff... TODO: should this be here?
self.breakpoint = 0
def execute_fsflags( s, inst ): old = s.fcsr & 0x1F new = s.rf[inst.rs1] & 0x1F s.fcsr = r_ulonglong((s.fcsr >> 5) << 5) | new s.rf[inst.rd] = old s.pc += 4
def x(self, lo, len):
mask = r_ulonglong(0xffffffffffffffff) >> (64 - len)
return (self.bits >> lo) & mask
def execute_fsgnjx_d( s, inst ): sign_mask = r_ulonglong( 1 << 63 ) body_mask = sign_mask - 1 a, b = s.fp[inst.rs1], s.fp[inst.rs2] s.fp[inst.rd] = (b & sign_mask) ^ a s.pc += 4
def execute_fsflags(s, inst):
old = s.fcsr & 0x1F
new = s.rf[inst.rs1] & 0x1F
s.fcsr = r_ulonglong((s.fcsr >> 5) << 5) | new
s.rf[inst.rd] = old
s.pc += 4
def fp_neg( value, nbits ): sign_mask = r_ulonglong( 1 << (nbits - 1) ) return sign_mask ^ value
def sext_32( value ):
value = r_ulonglong( value )
value = 0x00000000ffffffff & value
if value & 0x80000000:
return r_ulonglong( 0xffffffff00000000 ) | value
return value
def trim_64( value ): value = r_ulonglong( value ) return value & r_ulonglong( 0xffffffffffffffff )
def trim( value, nbits ): value = r_ulonglong( value ) mask = r_ulonglong( 0xffffffffffffffff ) >> (64 - nbits) return value & mask
def x(self, lo, len):
mask = r_ulonglong(0xFFFFFFFFFFFFFFFF) >> (64 - len)
return (self.bits >> lo) & mask
def fp_neg(value, nbits):
sign_mask = r_ulonglong(1 << (nbits - 1))
return sign_mask ^ value
def __init__(self,
memory,
debug,
reset_addr=0x400,
xlen=64,
flen=64,
extensions="imafd"):
self.pc = reset_addr
self.xlen = xlen # defines the bitwidth of int registers
self.flen = flen # defines the bitwidth of fp registers
# TODO: convert to lower
self.extensions = extensions
self.rf = RiscVRegisterFile(nbits=self.xlen)
self.csr = Csr(self)
# TODO: a bit hacky...
if self.extension_enabled("f"):
self.fp = RiscVFPRegisterFile()
self.fp.debug = debug
self.fcsr = r_ulonglong(0) # Bits( 32 )
self.mem = memory
if self.extension_enabled("a"):
self.load_reservation = 0 # Bits( 64 )
self.debug = debug
self.rf.debug = debug
self.mem.debug = debug
# other state
self.prv = PRV_M
self.mepc = 0
self.mbadaddr = 0
self.mtimecmp = 0
self.mscratch = 0
self.mcause = 0
self.minstret = 0
self.mie = 0
self.mip = 0
self.sepc = 0
self.sbadaddr = 0
self.sscratch = 0
self.stvec = 0
self.sptbr = 0
self.scause = 0
self.sutime_delta = 0
self.suinstret_delta = 0
self.tohost = 0
self.fromhost = 0
# coprocessor registers
self.status = 0
self.stats_en = 0
self.num_insts = 0
self.stat_num_insts = 0
# we need a dedicated running flag bacase status could be 0 on a
# syscall_exit
self.running = True
# indicate if this is running a self-checking test
self.testbin = False
# executable name
self.exe_name = ""
# syscall stuff... TODO: should this be here?
self.breakpoint = 0
