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Fix up adjust_sp_imm instruction.

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* Use imm64 rather than offset32
* Add predicate to enforce signed 32-bit limit to imm
* Remove AdjustSpImm format
* Add encoding tests for adjust_sp_imm
* Adjust use of adjust_sp_imm in Intel prologue_epilogue to match
This commit is contained in:
Tyler McMullen
2017-12-02 15:37:04 -08:00
committed by Jakob Stoklund Olesen
parent 1a11c351b5
commit ced39f5186
11 changed files with 46 additions and 27 deletions
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1
lib/cretonne/meta/base/formats.py
View File

@@ -69,7 +69,6 @@ RegSpill = InstructionFormat(
VALUE, ('src', regunit), ('dst', entities.stack_slot))
RegFill = InstructionFormat(
VALUE, ('src', entities.stack_slot), ('dst', regunit))
AdjustSpImm = InstructionFormat(offset32)
Trap = InstructionFormat(trapcode)
CondTrap = InstructionFormat(VALUE, trapcode)

10
lib/cretonne/meta/base/instructions.py
View File

@@ -549,12 +549,16 @@ copy_special = Instruction(
ins=(src, dst),
other_side_effects=True)
Offset = Operand('Offset', offset32, 'Offset from current stack pointer')
StackOffset = Operand('Offset', imm64, 'Offset from current stack pointer')
adjust_sp_imm = Instruction(
'adjust_sp_imm', r"""
Adds an immediate offset value to the stack pointer register.
Adds ``Offset`` immediate offset value to the stack pointer register.
This instruction is used to adjust the stack pointer, primarily in function
prologues and epilogues. ``Offset`` is constrained to the size of a signed
32-bit integer.
""",
ins=(Offset,),
ins=(StackOffset,),
other_side_effects=True)
regspill = Instruction(