d2ddc700a8
This instruction behaves like icmp fused with brnz, and it can be used to represent fused compare+branch instruction on Intel when optimizing for macro-op fusion. RISC-V provides compare-and-branch instructions directly, and it is needed there too.
57 lines
2.1 KiB
Python
57 lines
2.1 KiB
Python
"""
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The cretonne.formats defines all instruction formats.
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Every instruction format has a corresponding `InstructionData` variant in the
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Rust representation of cretonne IL, so all instruction formats must be defined
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in this module.
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"""
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from __future__ import absolute_import
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from cdsl.formats import InstructionFormat
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from cdsl.operands import VALUE, VARIABLE_ARGS
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from .immediates import imm64, uimm8, ieee32, ieee64, intcc, floatcc
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from .entities import ebb, sig_ref, func_ref, jump_table
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Nullary = InstructionFormat()
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Unary = InstructionFormat(VALUE)
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UnaryImm = InstructionFormat(imm64)
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UnaryIeee32 = InstructionFormat(ieee32)
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UnaryIeee64 = InstructionFormat(ieee64)
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UnarySplit = InstructionFormat(VALUE, multiple_results=True)
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Binary = InstructionFormat(VALUE, VALUE)
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BinaryImm = InstructionFormat(VALUE, imm64)
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# Generate result + overflow flag.
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BinaryOverflow = InstructionFormat(VALUE, VALUE, multiple_results=True)
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# The select instructions are controlled by the second VALUE operand.
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# The first VALUE operand is the controlling flag which has a derived type.
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# The fma instruction has the same constraint on all inputs.
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Ternary = InstructionFormat(VALUE, VALUE, VALUE, typevar_operand=1)
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# Catch-all for instructions with many outputs and inputs and no immediate
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# operands.
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MultiAry = InstructionFormat(VARIABLE_ARGS, multiple_results=True)
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InsertLane = InstructionFormat(VALUE, ('lane', uimm8), VALUE)
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ExtractLane = InstructionFormat(VALUE, ('lane', uimm8))
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IntCompare = InstructionFormat(intcc, VALUE, VALUE)
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IntCompareImm = InstructionFormat(intcc, VALUE, imm64)
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FloatCompare = InstructionFormat(floatcc, VALUE, VALUE)
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Jump = InstructionFormat(ebb, VARIABLE_ARGS)
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Branch = InstructionFormat(VALUE, ebb, VARIABLE_ARGS)
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BranchIcmp = InstructionFormat(intcc, VALUE, VALUE, ebb, VARIABLE_ARGS)
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BranchTable = InstructionFormat(VALUE, jump_table)
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Call = InstructionFormat(
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func_ref, VARIABLE_ARGS, multiple_results=True)
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IndirectCall = InstructionFormat(
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sig_ref, VALUE, VARIABLE_ARGS,
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multiple_results=True)
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# Finally extract the names of global variables in this module.
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InstructionFormat.extract_names(globals())
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