def push_field(self, num, value):
ptr = rffi.ptradd(self.ll_buffer, self.shape.ll_positions[num])
TP = lltype.typeOf(value)
# Handle bitfields
for c in unroll_letters_for_numbers:
if LL_TYPEMAP[c] is TP and self.shape.ll_bitsizes:
# Modify the current value with the bitfield changed
bitsize = self.shape.ll_bitsizes[num]
numbits = NUM_BITS(bitsize)
if numbits:
lowbit = LOW_BIT(bitsize)
bitmask = BIT_MASK(numbits, TP)
masktype = lltype.typeOf(bitmask)
value = rffi.cast(masktype, value)
current = rffi.cast(masktype, read_ptr(ptr, 0, TP))
current &= ~(bitmask << lowbit)
current |= (value & bitmask) << lowbit
value = rffi.cast(TP, current)
break
write_ptr(ptr, 0, value)
def push_field(self, num, value):
ptr = rffi.ptradd(self.ll_buffer, self.shape.ll_positions[num])
TP = lltype.typeOf(value)
# Handle bitfields
for c in unroll_letters_for_numbers:
if LL_TYPEMAP[c] is TP and self.shape.ll_bitsizes:
# Modify the current value with the bitfield changed
bitsize = self.shape.ll_bitsizes[num]
numbits = NUM_BITS(bitsize)
if numbits:
lowbit = LOW_BIT(bitsize)
bitmask = BIT_MASK(numbits, TP)
masktype = lltype.typeOf(bitmask)
value = rffi.cast(masktype, value)
current = rffi.cast(masktype, read_ptr(ptr, 0, TP))
current &= ~(bitmask << lowbit)
current |= (value & bitmask) << lowbit
value = rffi.cast(TP, current)
break
write_ptr(ptr, 0, value)
def cast_pos(self, i, ll_t):
pos = rffi.ptradd(self.ll_buffer, self.shape.ll_positions[i])
value = read_ptr(pos, 0, ll_t)
# Handle bitfields
for c in unroll_letters_for_numbers:
if LL_TYPEMAP[c] is ll_t and self.shape.ll_bitsizes:
bitsize = self.shape.ll_bitsizes[i]
numbits = NUM_BITS(bitsize)
if numbits:
lowbit = LOW_BIT(bitsize)
bitmask = BIT_MASK(numbits, ll_t)
masktype = lltype.typeOf(bitmask)
value = rffi.cast(masktype, value)
value >>= lowbit
value &= bitmask
if ll_t is lltype.Bool or signedtype(ll_t._type):
sign = (value >> (numbits - 1)) & 1
if sign:
value -= bitmask + 1
value = rffi.cast(ll_t, value)
break
return value
def cast_pos(self, i, ll_t):
pos = rffi.ptradd(self.ll_buffer, self.shape.ll_positions[i])
value = read_ptr(pos, 0, ll_t)
# Handle bitfields
for c in unroll_letters_for_numbers:
if LL_TYPEMAP[c] is ll_t and self.shape.ll_bitsizes:
bitsize = self.shape.ll_bitsizes[i]
numbits = NUM_BITS(bitsize)
if numbits:
lowbit = LOW_BIT(bitsize)
bitmask = BIT_MASK(numbits, ll_t)
masktype = lltype.typeOf(bitmask)
value = rffi.cast(masktype, value)
value >>= lowbit
value &= bitmask
if ll_t is lltype.Bool or signedtype(ll_t._type):
sign = (value >> (numbits - 1)) & 1
if sign:
value -= bitmask + 1
value = rffi.cast(ll_t, value)
break
return value
