3b71a27632
Add preamble syntax for declaring static and dynamic heaps, and update the langref section on heaps. Add IR support for heap references. Remove the heap_load and heap_store as discussed in #144. We will use heap_addr along with native load and store instructions in their place. Add the heap_addr instruction and document its bounds checking semantics.
69 lines
2.6 KiB
Python
69 lines
2.6 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, uimm32, ieee32, ieee64
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from .immediates import offset32, uoffset32
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from .immediates import boolean, intcc, floatcc, memflags, regunit
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from . import entities
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from .entities import ebb, sig_ref, func_ref, stack_slot, heap
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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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UnaryBool = InstructionFormat(boolean)
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UnaryGlobalVar = InstructionFormat(entities.global_var)
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Binary = InstructionFormat(VALUE, VALUE)
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BinaryImm = InstructionFormat(VALUE, imm64)
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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)
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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, entities.jump_table)
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Call = InstructionFormat(func_ref, VARIABLE_ARGS)
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IndirectCall = InstructionFormat(sig_ref, VALUE, VARIABLE_ARGS)
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Load = InstructionFormat(memflags, VALUE, offset32)
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Store = InstructionFormat(memflags, VALUE, VALUE, offset32)
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StackLoad = InstructionFormat(stack_slot, offset32)
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StackStore = InstructionFormat(VALUE, stack_slot, offset32)
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# Accessing a WebAssembly heap.
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# TODO: Add a reference to a `heap` declared in the preamble.
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HeapLoad = InstructionFormat(VALUE, uoffset32)
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HeapStore = InstructionFormat(VALUE, VALUE, uoffset32)
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HeapAddr = InstructionFormat(heap, VALUE, uimm32)
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RegMove = InstructionFormat(VALUE, ('src', regunit), ('dst', regunit))
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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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