48 lines
1.5 KiB
Python
48 lines
1.5 KiB
Python
"""
|
|
Supplementary instruction definitions for Intel.
|
|
|
|
This module defines additional instructions that are useful only to the Intel
|
|
target ISA.
|
|
"""
|
|
|
|
from cdsl.operands import Operand
|
|
from cdsl.instructions import Instruction, InstructionGroup
|
|
from base.instructions import iB
|
|
|
|
|
|
GROUP = InstructionGroup("x86", "Intel-specific instruction set")
|
|
|
|
nlo = Operand('nlo', iB, doc='Low part of numerator')
|
|
nhi = Operand('nhi', iB, doc='High part of numerator')
|
|
d = Operand('d', iB, doc='Denominator')
|
|
q = Operand('q', iB, doc='Quotient')
|
|
r = Operand('r', iB, doc='Remainder')
|
|
|
|
udivmodx = Instruction(
|
|
'x86_udivmodx', r"""
|
|
Extended unsigned division.
|
|
|
|
Concatenate the bits in `nhi` and `nlo` to form the numerator.
|
|
Interpret the bits as an unsigned number and divide by the unsigned
|
|
denominator `d`. Trap when `d` is zero or if the quotient is larger
|
|
than the range of the output.
|
|
|
|
Return both quotient and remainder.
|
|
""",
|
|
ins=(nlo, nhi, d), outs=(q, r), can_trap=True)
|
|
|
|
sdivmodx = Instruction(
|
|
'x86_sdivmodx', r"""
|
|
Extended signed division.
|
|
|
|
Concatenate the bits in `nhi` and `nlo` to form the numerator.
|
|
Interpret the bits as a signed number and divide by the signed
|
|
denominator `d`. Trap when `d` is zero or if the quotient is outside
|
|
the range of the output.
|
|
|
|
Return both quotient and remainder.
|
|
""",
|
|
ins=(nlo, nhi, d), outs=(q, r), can_trap=True)
|
|
|
|
GROUP.close()
|